diff options
Diffstat (limited to 'cpu/bf533')
| -rw-r--r-- | cpu/bf533/Makefile | 46 | ||||
| -rw-r--r-- | cpu/bf533/bf533_serial.h | 78 | ||||
| -rw-r--r-- | cpu/bf533/cache.S | 125 | ||||
| -rw-r--r-- | cpu/bf533/config.mk | 27 | ||||
| -rw-r--r-- | cpu/bf533/cplbhdlr.S | 194 | ||||
| -rw-r--r-- | cpu/bf533/cplbmgr.S | 601 | ||||
| -rw-r--r-- | cpu/bf533/cpu.c | 194 | ||||
| -rw-r--r-- | cpu/bf533/cpu.h | 65 | ||||
| -rw-r--r-- | cpu/bf533/flush.S | 402 | ||||
| -rw-r--r-- | cpu/bf533/interrupt.S | 391 | ||||
| -rw-r--r-- | cpu/bf533/interrupts.c | 165 | ||||
| -rw-r--r-- | cpu/bf533/ints.c | 107 | ||||
| -rw-r--r-- | cpu/bf533/serial.c | 194 | ||||
| -rw-r--r-- | cpu/bf533/start.S | 435 | ||||
| -rw-r--r-- | cpu/bf533/start1.S | 38 | ||||
| -rw-r--r-- | cpu/bf533/traps.c | 73 |
16 files changed, 3135 insertions, 0 deletions
diff --git a/cpu/bf533/Makefile b/cpu/bf533/Makefile new file mode 100644 index 0000000..c63a8f6 --- /dev/null +++ b/cpu/bf533/Makefile @@ -0,0 +1,46 @@ +# U-boot - Makefile +# +# Copyright (c) 2005 blackfin.uclinux.org +# +# (C) Copyright 2000-2004 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# See file CREDITS for list of people who contributed to this +# project. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2 of +# the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, +# MA 02111-1307 USA +# + +include $(TOPDIR)/config.mk + +LIB = lib$(CPU).a + +START = start.o start1.o interrupt.o cache.o cplbhdlr.o cplbmgr.o flush.o +OBJS = cpu.o traps.o ints.o serial.o interrupts.o + +all: .depend $(START) $(LIB) + +$(LIB): $(OBJS) + $(AR) crv $@ $(OBJS) + +######################################################################### + +.depend: Makefile $(START:.o=.S) $(OBJS:.o=.c) + $(CC) -M $(CFLAGS) $(START:.o=.S) $(OBJS:.o=.c) > $@ + +sinclude .depend + +######################################################################### diff --git a/cpu/bf533/bf533_serial.h b/cpu/bf533/bf533_serial.h new file mode 100644 index 0000000..ec63a5e --- /dev/null +++ b/cpu/bf533/bf533_serial.h @@ -0,0 +1,78 @@ +/* + * U-boot - bf533_serial.h Serial Driver defines + * + * Copyright (c) 2005 blackfin.uclinux.org + * + * This file is based on + * bf533_serial.h: Definitions for the BlackFin BF533 DSP serial driver. + * Copyright (C) 2003 Bas Vermeulen <bas@buyways.nl> + * BuyWays B.V. (www.buyways.nl) + * + * Based heavily on: + * blkfinserial.h: Definitions for the BlackFin DSP serial driver. + * + * Copyright (C) 2001 Tony Z. Kou tonyko@arcturusnetworks.com + * Copyright (C) 2001 Arcturus Networks Inc. <www.arcturusnetworks.com> + * + * Based on code from 68328serial.c which was: + * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu> + * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> + * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org> + * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com> + * + * (C) Copyright 2000-2004 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef _Bf533_SERIAL_H +#define _Bf533_SERIAL_H + +#include <linux/config.h> +#include <asm/blackfin.h> + +#define SYNC_ALL __asm__ __volatile__ ("ssync;\n") +#define ACCESS_LATCH *pUART_LCR |= UART_LCR_DLAB; +#define ACCESS_PORT_IER *pUART_LCR &= (~UART_LCR_DLAB); + +void serial_setbrg(void); +static void local_put_char(char ch); +void calc_baud(void); +void serial_setbrg(void); +int serial_init(void); +void serial_putc(const char c); +int serial_tstc(void); +int serial_getc(void); +void serial_puts(const char *s); +static void local_put_char(char ch); + +extern int get_clock(void); +int baud_table[5] = {9600, 19200, 38400, 57600, 115200}; + +struct { + unsigned char dl_high; + unsigned char dl_low; +} hw_baud_table[5]; + +#ifdef CONFIG_STAMP +extern unsigned long pll_div_fact; +#endif + +#endif diff --git a/cpu/bf533/cache.S b/cpu/bf533/cache.S new file mode 100644 index 0000000..1822d1f --- /dev/null +++ b/cpu/bf533/cache.S @@ -0,0 +1,125 @@ + + +#define ASSEMBLY +#include <asm/linkage.h> +#include <asm/cpu/def_LPBlackfin.h> + +.text +.align 2 +ENTRY(blackfin_icache_flush_range) + R2 = -32; + R2 = R0 & R2; + P0 = R2; + P1 = R1; + CSYNC; +1: + IFLUSH[P0++]; + CC = P0 < P1(iu); + IF CC JUMP 1b(bp); + IFLUSH[P0]; + SSYNC; + RTS; + +ENTRY(blackfin_dcache_flush_range) + R2 = -32; + R2 = R0 & R2; + P0 = R2; + P1 = R1; + CSYNC; +1: + FLUSH[P0++]; + CC = P0 < P1(iu); + IF CC JUMP 1b(bp); + FLUSH[P0]; + SSYNC; + RTS; + +ENTRY(_icache_invalidate) +ENTRY(invalidate_entire_icache) + [--SP] = ( R7:5); + + P0.L = (IMEM_CONTROL & 0xFFFF); + P0.H = (IMEM_CONTROL >> 16); + R7 = [P0]; + + /* Clear the IMC bit , All valid bits in the instruction + * cache are set to the invalid state + */ + BITCLR(R7,IMC_P); + CLI R6; + SSYNC; /* SSYNC required before invalidating cache. */ + .align 8; + [P0] = R7; + SSYNC; + STI R6; + + /* Configures the instruction cache agian */ + R6 = (IMC | ENICPLB); + R7 = R7 | R6; + + CLI R6; + SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */ + .align 8; + [P0] = R7; + SSYNC; + STI R6; + + ( R7:5) = [SP++]; + RTS; + +/* Invalidate the Entire Data cache by + * clearing DMC[1:0] bits + */ +ENTRY(invalidate_entire_dcache) +ENTRY(_dcache_invalidate) + [--SP] = ( R7:6); + + P0.L = (DMEM_CONTROL & 0xFFFF); + P0.H = (DMEM_CONTROL >> 16); + R7 = [P0]; + + /* Clear the DMC[1:0] bits, All valid bits in the data + * cache are set to the invalid state + */ + BITCLR(R7,DMC0_P); + BITCLR(R7,DMC1_P); + CLI R6; + SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */ + .align 8; + [P0] = R7; + SSYNC; + STI R6; + + /* Configures the data cache again */ + + R6 = (ACACHE_BCACHE | ENDCPLB | PORT_PREF0); + R7 = R7 | R6; + + CLI R6; + SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */ + .align 8; + [P0] = R7; + SSYNC; + STI R6; + + ( R7:6) = [SP++]; + RTS; + +ENTRY(blackfin_dcache_invalidate_range) + R2 = -32; + R2 = R0 & R2; + P0 = R2; + P1 = R1; + CSYNC; +1: + FLUSHINV[P0++]; + CC = P0 < P1 (iu); + IF CC JUMP 1b (bp); + + /* If the data crosses a cache line, then we'll be pointing to + ** the last cache line, but won't have flushed/invalidated it yet, so do + ** one more. + */ + FLUSHINV[P0]; + SSYNC; + RTS; diff --git a/cpu/bf533/config.mk b/cpu/bf533/config.mk new file mode 100644 index 0000000..a9d529e --- /dev/null +++ b/cpu/bf533/config.mk @@ -0,0 +1,27 @@ +# U-boot - config.mk +# +# Copyright (c) 2005 blackfin.uclinux.org +# +# (C) Copyright 2000-2004 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# See file CREDITS for list of people who contributed to this +# project. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2 of +# the License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, +# MA 02111-1307 USA +# + +PLATFORM_RELFLAGS += -ffixed-P5 diff --git a/cpu/bf533/cplbhdlr.S b/cpu/bf533/cplbhdlr.S new file mode 100644 index 0000000..b5abbbc --- /dev/null +++ b/cpu/bf533/cplbhdlr.S @@ -0,0 +1,194 @@ +/* Copyright (C) 2003 Analog Devices, Inc. All Rights Reserved. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. + * + * Blackfin BF533/2.6 support : LG Soft India + */ + + +/* Include an exception handler to invoke the CPLB manager + */ + +#include <asm-blackfin/linkage.h> +#include <asm/cplb.h> +#include <asm/entry.h> + + +.text + +.globl _cplb_hdr; +.type _cplb_hdr, STT_FUNC; +.extern _cplb_mgr; +.type _cplb_mgr, STT_FUNC; +.extern __unknown_exception_occurred; +.type __unknown_exception_occurred, STT_FUNC; +.extern __cplb_miss_all_locked; +.type __cplb_miss_all_locked, STT_FUNC; +.extern __cplb_miss_without_replacement; +.type __cplb_miss_without_replacement, STT_FUNC; +.extern __cplb_protection_violation; +.type __cplb_protection_violation, STT_FUNC; +.extern panic_pv; + +.align 2; + +ENTRY(_cplb_hdr) + SSYNC; + [--SP] = ( R7:0, P5:0 ); + [--SP] = ASTAT; + [--SP] = SEQSTAT; + [--SP] = I0; + [--SP] = I1; + [--SP] = I2; + [--SP] = I3; + [--SP] = LT0; + [--SP] = LB0; + [--SP] = LC0; + [--SP] = LT1; + [--SP] = LB1; + [--SP] = LC1; + R2 = SEQSTAT; + + /*Mask the contents of SEQSTAT and leave only EXCAUSE in R2*/ + R2 <<= 26; + R2 >>= 26; + + R1 = 0x23; /* Data access CPLB protection violation */ + CC = R2 == R1; + IF !CC JUMP not_data_write; + R0 = 2; /* is a write to data space*/ + JUMP is_icplb_miss; + +not_data_write: + R1 = 0x2C; /* CPLB miss on an instruction fetch */ + CC = R2 == R1; + R0 = 0; /* is_data_miss == False*/ + IF CC JUMP is_icplb_miss; + + R1 = 0x26; + CC = R2 == R1; + IF !CC JUMP unknown; + + R0 = 1; /* is_data_miss == True*/ + +is_icplb_miss: + +#if ( defined (CONFIG_BLKFIN_CACHE) || defined (CONFIG_BLKFIN_DCACHE)) +#if ( defined (CONFIG_BLKFIN_CACHE) && !defined (CONFIG_BLKFIN_DCACHE)) + R1 = CPLB_ENABLE_ICACHE; +#endif +#if ( !defined (CONFIG_BLKFIN_CACHE) && defined (CONFIG_BLKFIN_DCACHE)) + R1 = CPLB_ENABLE_DCACHE; +#endif +#if ( defined (CONFIG_BLKFIN_CACHE) && defined (CONFIG_BLKFIN_DCACHE)) + R1 = CPLB_ENABLE_DCACHE | CPLB_ENABLE_ICACHE; +#endif +#else + R1 = 0; +#endif + + [--SP] = RETS; + CALL _cplb_mgr; + RETS = [SP++]; + CC = R0 == 0; + IF !CC JUMP not_replaced; + LC1 = [SP++]; + LB1 = [SP++]; + LT1 = [SP++]; + LC0 = [SP++]; + LB0 = [SP++]; + LT0 = [SP++]; + I3 = [SP++]; + I2 = [SP++]; + I1 = [SP++]; + I0 = [SP++]; + SEQSTAT = [SP++]; + ASTAT = [SP++]; + ( R7:0, P5:0 ) = [SP++]; + RTS; + +unknown: + [--SP] = RETS; + CALL __unknown_exception_occurred; + RETS = [SP++]; + JUMP unknown; +not_replaced: + CC = R0 == CPLB_NO_UNLOCKED; + IF !CC JUMP next_check; + [--SP] = RETS; + CALL __cplb_miss_all_locked; + RETS = [SP++]; +next_check: + CC = R0 == CPLB_NO_ADDR_MATCH; + IF !CC JUMP next_check2; + [--SP] = RETS; + CALL __cplb_miss_without_replacement; + RETS = [SP++]; + JUMP not_replaced; +next_check2: + CC = R0 == CPLB_PROT_VIOL; + IF !CC JUMP strange_return_from_cplb_mgr; + [--SP] = RETS; + CALL __cplb_protection_violation; + RETS = [SP++]; + JUMP not_replaced; +strange_return_from_cplb_mgr: + IDLE; + CSYNC; + JUMP strange_return_from_cplb_mgr; + +/************************************ + * Diagnostic exception handlers + */ + +__cplb_miss_all_locked: + sp += -12; + R0 = CPLB_NO_UNLOCKED; + call panic_bfin; + SP += 12; + RTS; + + __cplb_miss_without_replacement: + sp += -12; + R0 = CPLB_NO_ADDR_MATCH; + call panic_bfin; + SP += 12; + RTS; + +__cplb_protection_violation: + sp += -12; + R0 = CPLB_PROT_VIOL; + call panic_bfin; + SP += 12; + RTS; + +__unknown_exception_occurred: + + /* This function is invoked by the default exception + * handler, if it does not recognise the kind of + * exception that has occurred. In other words, the + * default handler only handles some of the system's + * exception types, and it does not expect any others + * to occur. If your application is going to be using + * other kinds of exceptions, you must replace the + * default handler with your own, that handles all the + * exceptions you will use. + * + * Since there's nothing we can do, we just loop here + * at what we hope is a suitably informative label. + */ + + IDLE; +do_not_know_what_to_do: + CSYNC; + JUMP __unknown_exception_occurred; + + RTS; +.__unknown_exception_occurred.end: +.global __unknown_exception_occurred; +.type __unknown_exception_occurred, STT_FUNC; + +panic_bfin: + RTS; + diff --git a/cpu/bf533/cplbmgr.S b/cpu/bf533/cplbmgr.S new file mode 100644 index 0000000..fc3e3a8 --- /dev/null +++ b/cpu/bf533/cplbmgr.S @@ -0,0 +1,601 @@ +/*This file is subject to the terms and conditions of the GNU General Public + * License. + * + * Blackfin BF533/2.6 support : LG Soft India + * Modification: Dec 07 2004 + * 1. Correction in icheck_lock. Valid lock entries were + * geting victimized, for instruction cplb replacement. + * 2. Setup loop's are modified as now toolchain support's P Indexed + * addressing + * :LG Soft India + * + */ + +/* Usage: int _cplb_mgr(is_data_miss,int enable_cache) + * is_data_miss==2 => Mark as Dirty, write to the clean data page + * is_data_miss==1 => Replace a data CPLB. + * is_data_miss==0 => Replace an instruction CPLB. + * + * Returns: + * CPLB_RELOADED => Successfully updated CPLB table. + * CPLB_NO_UNLOCKED => All CPLBs are locked, so cannot be evicted.This indicates + * that the CPLBs in the configuration tablei are badly + * configured, as this should never occur. + * CPLB_NO_ADDR_MATCH => The address being accessed, that triggered the exception, + * is not covered by any of the CPLBs in the configuration + * table. The application isi presumably misbehaving. + * CPLB_PROT_VIOL => The address being accessed, that triggered thei exception, + * was not a first-write to a clean Write Back Data page, + * and so presumably is a genuine violation of the page's + * protection attributes. The application is misbehaving. + */ +#define ASSEMBLY + +#include <asm-blackfin/linkage.h> +#include <asm-blackfin/blackfin.h> +#include <asm-blackfin/cplbtab.h> +#include <asm-blackfin/cplb.h> + +.text + +.align 2; +ENTRY(_cplb_mgr) + + [--SP]=( R7:0,P5:0 ); + + CC = R0 == 2; + IF CC JUMP dcplb_write; + + CC = R0 == 0; + IF !CC JUMP dcplb_miss_compare; + + /* ICPLB Miss Exception. We need to choose one of the + * currently-installed CPLBs, and replace it with one + * from the configuration table. + */ + + P4.L = (ICPLB_FAULT_ADDR & 0xFFFF); + P4.H = (ICPLB_FAULT_ADDR >> 16); + + P1 = 16; + P5.L = page_size_table; + P5.H = page_size_table; + + P0.L = (ICPLB_DATA0 & 0xFFFF); + P0.H = (ICPLB_DATA0 >> 16); + R4 = [P4]; /* Get faulting address*/ + R6 = 64; /* Advance past the fault address, which*/ + R6 = R6 + R4; /* we'll use if we find a match*/ + R3 = ((16 << 8) | 2); /* Extract mask, bits 16 and 17.*/ + + R5 = 0; +isearch: + + R1 = [P0-0x100]; /* Address for this CPLB */ + + R0 = [P0++]; /* Info for this CPLB*/ + CC = BITTST(R0,0); /* Is the CPLB valid?*/ + IF !CC JUMP nomatch; /* Skip it, if not.*/ + CC = R4 < R1(IU); /* If fault address less than page start*/ + IF CC JUMP nomatch; /* then skip this one.*/ + R2 = EXTRACT(R0,R3.L) (Z); /* Get page size*/ + P1 = R2; + P1 = P5 + (P1<<2); /* index into page-size table*/ + R2 = [P1]; /* Get the page size*/ + R1 = R1 + R2; /* and add to page start, to get page end*/ + CC = R4 < R1(IU); /* and see whether fault addr is in page.*/ + IF !CC R4 = R6; /* If so, advance the address and finish loop.*/ + IF !CC JUMP isearch_done; +nomatch: + /* Go around again*/ + R5 += 1; + CC = BITTST(R5, 4); /* i.e CC = R5 >= 16*/ + IF !CC JUMP isearch; + +isearch_done: + I0 = R4; /* Fault address we'll search for*/ + + /* set up pointers */ + P0.L = (ICPLB_DATA0 & 0xFFFF); + P0.H = (ICPLB_DATA0 >> 16); + + /* The replacement procedure for ICPLBs */ + + P4.L = (IMEM_CONTROL & 0xFFFF); + P4.H = (IMEM_CONTROL >> 16); + + /* disable cplbs */ + R5 = [P4]; /* Control Register*/ + BITCLR(R5,ENICPLB_P); + CLI R1; + SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */ + .align 8; + [P4] = R5; + SSYNC; + STI R1; + + R1 = -1; /* end point comparison */ + R3 = 16; /* counter */ + + /* Search through CPLBs for first non-locked entry */ + /* Overwrite it by moving everyone else up by 1 */ +icheck_lock: + R0 = [P0++]; + R3 = R3 + R1; + CC = R3 == R1; + IF CC JUMP all_locked; + CC = BITTST(R0, 0); /* an invalid entry is good */ + IF !CC JUMP ifound_victim; + CC = BITTST(R0,1); /* but a locked entry isn't */ + IF CC JUMP icheck_lock; + +ifound_victim: +#ifdef CONFIG_CPLB_INFO + R7 = [P0 - 0x104]; + P2.L = ipdt_table; + P2.H = ipdt_table; + P3.L = ipdt_swapcount_table; + P3.H = ipdt_swapcount_table; + P3 += -4; +icount: + R2 = [P2]; /* address from config table */ + P2 += 8; + P3 += 8; + CC = R2==-1; + IF CC JUMP icount_done; + CC = R7==R2; + IF !CC JUMP icount; + R7 = [P3]; + R7 += 1; + [P3] = R7; + CSYNC; +icount_done: +#endif + LC0=R3; + LSETUP(is_move,ie_move) LC0; +is_move: + R0 = [P0]; + [P0 - 4] = R0; + R0 = [P0 - 0x100]; + [P0-0x104] = R0; +ie_move:P0+=4; + + /* We've made space in the ICPLB table, so that ICPLB15 + * is now free to be overwritten. Next, we have to determine + * which CPLB we need to install, from the configuration + * table. This is a matter of getting the start-of-page + * addresses and page-lengths from the config table, and + * determining whether the fault address falls within that + * range. + */ + + P2.L = ipdt_table; + P2.H = ipdt_table; +#ifdef CONFIG_CPLB_INFO + P3.L = ipdt_swapcount_table; + P3.H = ipdt_swapcount_table; + P3 += -8; +#endif + P0.L = page_size_table; + P0.H = page_size_table; + + /* Retrieve our fault address (which may have been advanced + * because the faulting instruction crossed a page boundary). + */ + + R0 = I0; + + /* An extraction pattern, to get the page-size bits from + * the CPLB data entry. Bits 16-17, so two bits at posn 16. + */ + + R1 = ((16<<8)|2); +inext: R4 = [P2++]; /* address from config table */ + R2 = [P2++]; /* data from config table */ +#ifdef CONFIG_CPLB_INFO + P3 += 8; +#endif + + CC = R4 == -1; /* End of config table*/ + IF CC JUMP no_page_in_table; + + /* See if failed address > start address */ + CC = R4 <= R0(IU); + IF !CC JUMP inext; + + /* extract page size (17:16)*/ + R3 = EXTRACT(R2, R1.L) (Z); + + /* add page size to addr to get range */ + + P5 = R3; + P5 = P0 + (P5 << 2); /* scaled, for int access*/ + R3 = [P5]; + R3 = R3 + R4; + + /* See if failed address < (start address + page size) */ + CC = R0 < R3(IU); + IF !CC JUMP inext; + + /* We've found a CPLB in the config table that covers + * the faulting address, so install this CPLB into the + * last entry of the table. + */ + + P1.L = (ICPLB_DATA15 & 0xFFFF); /*ICPLB_DATA15*/ + P1.H = (ICPLB_DATA15 >> 16); + [P1] = R2; + [P1-0x100] = R4; +#ifdef CONFIG_CPLB_INFO + R3 = [P3]; + R3 += 1; + [P3] = R3; +#endif + + /* P4 points to IMEM_CONTROL, and R5 contains its old + * value, after we disabled ICPLBS. Re-enable them. + */ + + BITSET(R5,ENICPLB_P); + CLI R2; + SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */ + .align 8; + [P4] = R5; + SSYNC; + STI R2; + + ( R7:0,P5:0 ) = [SP++]; + R0 = CPLB_RELOADED; + RTS; + +/* FAILED CASES*/ +no_page_in_table: + ( R7:0,P5:0 ) = [SP++]; + R0 = CPLB_NO_ADDR_MATCH; + RTS; +all_locked: + ( R7:0,P5:0 ) = [SP++]; + R0 = CPLB_NO_UNLOCKED; + RTS; +prot_violation: + ( R7:0,P5:0 ) = [SP++]; + R0 = CPLB_PROT_VIOL; + RTS; + +dcplb_write: + + /* if a DCPLB is marked as write-back (CPLB_WT==0), and + * it is clean (CPLB_DIRTY==0), then a write to the + * CPLB's page triggers a protection violation. We have to + * mark the CPLB as dirty, to indicate that there are + * pending writes associated with the CPLB. + */ + + P4.L = (DCPLB_STATUS & 0xFFFF); + P4.H = (DCPLB_STATUS >> 16); + P3.L = (DCPLB_DATA0 & 0xFFFF); + P3.H = (DCPLB_DATA0 >> 16); + R5 = [P4]; + + /* A protection violation can be caused by more than just writes + * to a clean WB page, so we have to ensure that: + * - It's a write + * - to a clean WB page + * - and is allowed in the mode the access occurred. + */ + + CC = BITTST(R5, 16); /* ensure it was a write*/ + IF !CC JUMP prot_violation; + + /* to check the rest, we have to retrieve the DCPLB.*/ + + /* The low half of DCPLB_STATUS is a bit mask*/ + + R2 = R5.L (Z); /* indicating which CPLB triggered the event.*/ + R3 = 30; /* so we can use this to determine the offset*/ + R2.L = SIGNBITS R2; + R2 = R2.L (Z); /* into the DCPLB table.*/ + R3 = R3 - R2; + P4 = R3; + P3 = P3 + (P4<<2); + R3 = [P3]; /* Retrieve the CPLB*/ + + /* Now we can check whether it's a clean WB page*/ + + CC = BITTST(R3, 14); /* 0==WB, 1==WT*/ + IF CC JUMP prot_violation; + CC = BITTST(R3, 7); /* 0 == clean, 1 == dirty*/ + IF CC JUMP prot_violation; + + /* Check whether the write is allowed in the mode that was active.*/ + + R2 = 1<<3; /* checking write in user mode*/ + CC = BITTST(R5, 17); /* 0==was user, 1==was super*/ + R5 = CC; + R2 <<= R5; /* if was super, check write in super mode*/ + R2 = R3 & R2; + CC = R2 == 0; + IF CC JUMP prot_violation; + + /* It's a genuine write-to-clean-page.*/ + + BITSET(R3, 7); /* mark as dirty*/ + [P3] = R3; /* and write back.*/ + CSYNC; + ( R7:0,P5:0 ) = [SP++]; + R0 = CPLB_RELOADED; + RTS; + +dcplb_miss_compare: + + /* Data CPLB Miss event. We need to choose a CPLB to + * evict, and then locate a new CPLB to install from the + * config table, that covers the faulting address. + */ + + P1.L = (DCPLB_DATA15 & 0xFFFF); + P1.H = (DCPLB_DATA15 >> 16); + + P4.L = (DCPLB_FAULT_ADDR & 0xFFFF); + P4.H = (DCPLB_FAULT_ADDR >> 16); + R4 = [P4]; + I0 = R4; + + /* The replacement procedure for DCPLBs*/ + + R6 = R1; /* Save for later*/ + + /* Turn off CPLBs while we work.*/ + P4.L = (DMEM_CONTROL & 0xFFFF); + P4.H = (DMEM_CONTROL >> 16); + R5 = [P4]; + BITCLR(R5,ENDCPLB_P); + CLI R0; + SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */ + .align 8; + [P4] = R5; + SSYNC; + STI R0; + + /* Start looking for a CPLB to evict. Our order of preference + * is: invalid CPLBs, clean CPLBs, dirty CPLBs. Locked CPLBs + * are no good. + */ + + I1.L = (DCPLB_DATA0 & 0xFFFF); + I1.H = (DCPLB_DATA0 >> 16); + P1 = 3; + P2 = 16; + I2.L = dcplb_preference; + I2.H = dcplb_preference; + LSETUP(sdsearch1, edsearch1) LC0 = P1; +sdsearch1: + R0 = [I2++]; /* Get the bits we're interested in*/ + P0 = I1; /* Go back to start of table*/ + LSETUP (sdsearch2, edsearch2) LC1 = P2; +sdsearch2: + R1 = [P0++]; /* Fetch each installed CPLB in turn*/ + R2 = R1 & R0; /* and test for interesting bits.*/ + CC = R2 == 0; /* If none are set, it'll do.*/ + IF !CC JUMP skip_stack_check; + + R2 = [P0 - 0x104]; /* R2 - PageStart */ + P3.L = page_size_table; /* retrive end address */ + P3.H = page_size_table; /* retrive end address */ + R3 = 0x2; /* 0th - position, 2 bits -length */ + nop; /*Anamoly 05000209*/ + R7 = EXTRACT(R1,R3.l); + R7 = R7 << 2; /* Page size index offset */ + P5 = R7; + P3 = P3 + P5; + R7 = [P3]; /* page size in 1K bytes */ + + R7 = R7 << 0xA; /* in bytes * 1024*/ + R7 = R2 + R7; /* R7 - PageEnd */ + R4 = SP; /* Test SP is in range */ + + CC = R7 < R4; /* if PageEnd < SP */ + IF CC JUMP dfound_victim; + R3 = 0x284; /* stack length from start of trap till the point */ + /* 20 stack locations for future modifications */ + R4 = R4 + R3; + CC = R4 < R2; /* if SP + stacklen < PageStart */ + IF CC JUMP dfound_victim; +skip_stack_check: + +edsearch2: NOP; +edsearch1: NOP; + + /* If we got here, we didn't find a DCPLB we considered + * replacable, which means all of them were locked. + */ + + JUMP all_locked; +dfound_victim: + +#ifdef CONFIG_CPLB_INFO + R1 = [P0 - 0x104]; + P2.L = dpdt_table; + P2.H = dpdt_table; + P3.L = dpdt_swapcount_table; + P3.H = dpdt_swapcount_table; + P3 += -4; +dicount: + R2 = [P2]; + P2 += 8; + P3 += 8; + CC = R2==-1; + IF CC JUMP dicount_done; + CC = R1==R2; + IF !CC JUMP dicount; + R1 = [P3]; + R1 += 1; + [P3] = R1; + CSYNC; +dicount_done: +#endif + + /* Clean down the hardware loops*/ + R2 = 0; + LC1 = R2; + LC0 = R2; + + /* There's a suitable victim in [P0-4] (because we've + * advanced already). If it's a valid dirty write-back + * CPLB, we need to flush the pending writes first. + */ + + CC = BITTST(R1, 0); /* Is it valid?*/ + IF !CC JUMP Ddoverwrite;/* nope.*/ + CC = BITTST(R1, 7); /* Is it dirty?*/ + IF !CC JUMP Ddoverwrite (BP); /* Nope.*/ + CC = BITTST(R1, 14); /* Is it Write-Through?*/ + IF CC JUMP Ddoverwrite; /* Yep*/ + + /* This is a dirty page, so we need to flush all writes + * that are pending on the page. + */ + + /* Retrieve the page start address*/ + R0 = [P0 - 0x104]; + [--sp] = rets; + CALL dcplb_flush; /* R0==CPLB addr, R1==CPLB data*/ + rets = [sp++]; +Ddoverwrite: + + /* [P0-4] is a suitable victim CPLB, so we want to + * overwrite it by moving all the following CPLBs + * one space closer to the start. + */ + + R1.L = ((DCPLB_DATA15+4) & 0xFFFF); /*DCPLB_DATA15+4*/ + R1.H = ((DCPLB_DATA15+4) >> 16); + R0 = P0; + + /* If the victim happens to be in DCPLB15, + * we don't need to move anything. + */ + + CC = R1 == R0; + IF CC JUMP de_moved; + R1 = R1 - R0; + R1 >>= 2; + P1 = R1; + LSETUP(ds_move, de_move) LC0=P1; +ds_move: + R0 = [P0++]; /* move data */ + [P0 - 8] = R0; + R0 = [P0-0x104] /* move address */ +de_move: [P0-0x108] = R0; + + /* We've now made space in DCPLB15 for the new CPLB to be + * installed. The next stage is to locate a CPLB in the + * config table that covers the faulting address. + */ + +de_moved:NOP; + R0 = I0; /* Our faulting address */ + + P2.L = dpdt_table; + P2.H = dpdt_table; +#ifdef CONFIG_CPLB_INFO + P3.L = dpdt_swapcount_table; + P3.H = dpdt_swapcount_table; + P3 += -8; +#endif + + P1.L = page_size_table; + P1.H = page_size_table; + + /* An extraction pattern, to retrieve bits 17:16.*/ + + R1 = (16<<8)|2; +dnext: R4 = [P2++]; /* address */ + R2 = [P2++]; /* data */ +#ifdef CONFIG_CPLB_INFO + P3 += 8; +#endif + + CC = R4 == -1; + IF CC JUMP no_page_in_table; + + /* See if failed address > start address */ + CC = R4 <= R0(IU); + IF !CC JUMP dnext; + + /* extract page size (17:16)*/ + R3 = EXTRACT(R2, R1.L) (Z); + + /* add page size to addr to get range */ + + P5 = R3; + P5 = P1 + (P5 << 2); + R3 = [P5]; + R3 = R3 + R4; + + /* See if failed address < (start address + page size) */ + CC = R0 < R3(IU); + IF !CC JUMP dnext; + + /* We've found the CPLB that should be installed, so + * write it into CPLB15, masking off any caching bits + * if necessary. + */ + + P1.L = (DCPLB_DATA15 & 0xFFFF); + P1.H = (DCPLB_DATA15 >> 16); + + /* If the DCPLB has cache bits set, but caching hasn't + * been enabled, then we want to mask off the cache-in-L1 + * bit before installing. Moreover, if caching is off, we + * also want to ensure that the DCPLB has WT mode set, rather + * than WB, since WB pages still trigger first-write exceptions + * even when not caching is off, and the page isn't marked as + * cachable. Finally, we could mark the page as clean, not dirty, + * but we choose to leave that decision to the user; if the user + * chooses to have a CPLB pre-defined as dirty, then they always + * pay the cost of flushing during eviction, but don't pay the + * cost of first-write exceptions to mark the page as dirty. + */ + +#ifdef CONFIG_BLKFIN_WT + BITSET(R6, 14); /* Set WT*/ +#endif + + [P1] = R2; + [P1-0x100] = R4; +#ifdef CONFIG_CPLB_INFO + R3 = [P3]; + R3 += 1; + [P3] = R3; +#endif + + /* We've installed the CPLB, so re-enable CPLBs. P4 + * points to DMEM_CONTROL, and R5 is the value we + * last wrote to it, when we were disabling CPLBs. + */ + + BITSET(R5,ENDCPLB_P); + CLI R2; + .align 8; + [P4] = R5; + SSYNC; + STI R2; + + ( R7:0,P5:0 ) = [SP++]; + R0 = CPLB_RELOADED; + RTS; + +.data +.align 4; +page_size_table: +.byte4 0x00000400; /* 1K */ +.byte4 0x00001000; /* 4K */ +.byte4 0x00100000; /* 1M */ +.byte4 0x00400000; /* 4M */ + +.align 4; +dcplb_preference: +.byte4 0x00000001; /* valid bit */ +.byte4 0x00000082; /* dirty+lock bits */ +.byte4 0x00000002; /* lock bit */ diff --git a/cpu/bf533/cpu.c b/cpu/bf533/cpu.c new file mode 100644 index 0000000..2c139f5 --- /dev/null +++ b/cpu/bf533/cpu.c @@ -0,0 +1,194 @@ +/* + * U-boot - cpu.c CPU specific functions + * + * Copyright (c) 2005 blackfin.uclinux.org + * + * (C) Copyright 2000-2004 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/blackfin.h> +#include <command.h> +#include <asm/entry.h> + +#define SSYNC() asm("ssync;") +#define CACHE_ON 1 +#define CACHE_OFF 0 + +/* Data Attibutes*/ + +#define SDRAM_IGENERIC (PAGE_SIZE_4MB | CPLB_L1_CHBL | CPLB_USER_RD | CPLB_VALID) +#define SDRAM_IKERNEL (PAGE_SIZE_4MB | CPLB_L1_CHBL | CPLB_USER_RD | CPLB_VALID | CPLB_LOCK) +#define L1_IMEMORY (PAGE_SIZE_1MB | CPLB_L1_CHBL | CPLB_USER_RD | CPLB_VALID | CPLB_LOCK) +#define SDRAM_INON_CHBL (PAGE_SIZE_4MB | CPLB_USER_RD | CPLB_VALID) + +#define ANOMALY_05000158 0x200 +#define SDRAM_DGENERIC (PAGE_SIZE_4MB | CPLB_L1_CHBL | CPLB_WT | CPLB_L1_AOW | CPLB_SUPV_WR | CPLB_USER_RD | CPLB_USER_WR | CPLB_VALID | ANOMALY_05000158) +#define SDRAM_DNON_CHBL (PAGE_SIZE_4MB | CPLB_WT | CPLB_L1_AOW | CPLB_SUPV_WR | CPLB_USER_WR | CPLB_USER_RD | CPLB_VALID | ANOMALY_05000158) +#define SDRAM_DKERNEL (PAGE_SIZE_4MB | CPLB_L1_CHBL | CPLB_WT | CPLB_L1_AOW | CPLB_USER_RD | CPLB_SUPV_WR | CPLB_USER_WR | CPLB_VALID | CPLB_LOCK | ANOMALY_05000158) +#define L1_DMEMORY (PAGE_SIZE_4KB | CPLB_L1_CHBL | CPLB_L1_AOW | CPLB_WT | CPLB_SUPV_WR | CPLB_USER_WR | CPLB_VALID | ANOMALY_05000158) +#define SDRAM_EBIU (PAGE_SIZE_4MB | CPLB_WT | CPLB_L1_AOW | CPLB_USER_RD | CPLB_USER_WR | CPLB_SUPV_WR | CPLB_VALID | ANOMALY_05000158) + +static unsigned int icplb_table[16][2]={ + {0xFFA00000, L1_IMEMORY}, + {0x00000000, SDRAM_IKERNEL}, /*SDRAM_Page1*/ + {0x00400000, SDRAM_IKERNEL}, /*SDRAM_Page1*/ + {0x07C00000, SDRAM_IKERNEL}, /*SDRAM_Page14*/ + {0x00800000, SDRAM_IGENERIC}, /*SDRAM_Page2*/ + {0x00C00000, SDRAM_IGENERIC}, /*SDRAM_Page2*/ + {0x01000000, SDRAM_IGENERIC}, /*SDRAM_Page4*/ + {0x01400000, SDRAM_IGENERIC}, /*SDRAM_Page5*/ + {0x01800000, SDRAM_IGENERIC}, /*SDRAM_Page6*/ + {0x01C00000, SDRAM_IGENERIC}, /*SDRAM_Page7*/ + {0x02000000, SDRAM_IGENERIC}, /*SDRAM_Page8*/ + {0x02400000, SDRAM_IGENERIC}, /*SDRAM_Page9*/ + {0x02800000, SDRAM_IGENERIC}, /*SDRAM_Page10*/ + {0x02C00000, SDRAM_IGENERIC}, /*SDRAM_Page11*/ + {0x03000000, SDRAM_IGENERIC}, /*SDRAM_Page12*/ + {0x03400000, SDRAM_IGENERIC}, /*SDRAM_Page13*/ +}; + +static unsigned int dcplb_table[16][2]={ + {0xFFA00000,L1_DMEMORY}, + {0x00000000,SDRAM_DKERNEL}, /*SDRAM_Page1*/ + {0x00400000,SDRAM_DKERNEL}, /*SDRAM_Page1*/ + {0x07C00000,SDRAM_DKERNEL}, /*SDRAM_Page15*/ + {0x00800000,SDRAM_DGENERIC}, /*SDRAM_Page2*/ + {0x00C00000,SDRAM_DGENERIC}, /*SDRAM_Page3*/ + {0x01000000,SDRAM_DGENERIC}, /*SDRAM_Page4*/ + {0x01400000,SDRAM_DGENERIC}, /*SDRAM_Page5*/ + {0x01800000,SDRAM_DGENERIC}, /*SDRAM_Page6*/ + {0x01C00000,SDRAM_DGENERIC}, /*SDRAM_Page7*/ + {0x02000000,SDRAM_DGENERIC}, /*SDRAM_Page8*/ + {0x02400000,SDRAM_DGENERIC}, /*SDRAM_Page9*/ + {0x02800000,SDRAM_DGENERIC}, /*SDRAM_Page10*/ + {0x02C00000,SDRAM_DGENERIC}, /*SDRAM_Page11*/ + {0x03000000,SDRAM_DGENERIC}, /*SDRAM_Page12*/ + {0x20000000,SDRAM_EBIU}, /*For Network */ +}; + + + + + +int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) +{ + __asm__ __volatile__ + ("cli r3;" + "P0 = %0;" + "JUMP (P0);" + : + : "r" (L1_ISRAM) + ); + + return 0; +} + +/* These functions are just used to satisfy the linker */ +int cpu_init(void) +{ + return 0; +} + +int cleanup_before_linux(void) +{ + return 0; +} + +void icache_enable(void) +{ + unsigned int *I0,*I1; + int i; + + I0 = (unsigned int *)ICPLB_ADDR0; + I1 = (unsigned int *)ICPLB_DATA0; + + for(i=0;i<16;i++){ + *I0++ = icplb_table[i][0]; + *I1++ = icplb_table[i][1]; + } + cli(); + SSYNC(); + *(unsigned int *)IMEM_CONTROL = IMC | ENICPLB; + SSYNC(); + sti(); +} + +void icache_disable(void) +{ + cli(); + SSYNC(); + *(unsigned int *)IMEM_CONTROL &= ~(IMC | ENICPLB); + SSYNC(); + sti(); +} + +int icache_status(void) +{ + unsigned int value; + value = *(unsigned int *)IMEM_CONTROL; + + if( value & (IMC|ENICPLB) ) + return CACHE_ON; + else + return CACHE_OFF; +} + +void dcache_enable(void) +{ + unsigned int *I0,*I1; + unsigned int temp; + int i; + I0 = (unsigned int *)DCPLB_ADDR0; + I1 = (unsigned int *)DCPLB_DATA0; + + for(i=0;i<16;i++){ + *I0++ = dcplb_table[i][0]; + *I1++ = dcplb_table[i][1]; + } + cli(); + temp = *(unsigned int *)DMEM_CONTROL; + SSYNC(); + *(unsigned int *)DMEM_CONTROL = ACACHE_BCACHE |ENDCPLB |PORT_PREF0|temp; + SSYNC(); + sti(); +} + + +void dcache_disable(void) +{ + cli(); + SSYNC(); + *(unsigned int *)DMEM_CONTROL &= ~(ACACHE_BCACHE |ENDCPLB |PORT_PREF0); + SSYNC(); + sti(); +} + +int dcache_status(void) +{ + unsigned int value; + value = *(unsigned int *)DMEM_CONTROL; + if( value & (ENDCPLB)) + return CACHE_ON; + else + return CACHE_OFF; +} diff --git a/cpu/bf533/cpu.h b/cpu/bf533/cpu.h new file mode 100644 index 0000000..7ec3387 --- /dev/null +++ b/cpu/bf533/cpu.h @@ -0,0 +1,65 @@ +/* + * U-boot - cpu.h + * + * Copyright (c) 2005 blackfin.uclinux.org + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef _CPU_H_ +#define _CPU_H_ + +#include <command.h> + +#define INTERNAL_IRQS (32) +#define NUM_IRQ_NODES 16 +#define DEF_INTERRUPT_FLAGS 1 +#define MAX_TIM_LOAD 0xFFFFFFFF + +void blackfin_irq_panic(int reason, struct pt_regs * reg); +extern void dump(struct pt_regs * regs); +void display_excp(void); +asmlinkage void evt_nmi(void); +asmlinkage void evt_exception(void); +asmlinkage void trap(void); +asmlinkage void evt_ivhw(void); +asmlinkage void evt_rst(void); +asmlinkage void evt_timer(void); +asmlinkage void evt_evt7(void); +asmlinkage void evt_evt8(void); +asmlinkage void evt_evt9(void); +asmlinkage void evt_evt10(void); +asmlinkage void evt_evt11(void); +asmlinkage void evt_evt12(void); +asmlinkage void evt_evt13(void); +asmlinkage void evt_soft_int1(void); +asmlinkage void evt_system_call(void); +void blackfin_irq_panic(int reason, struct pt_regs * regs); +void blackfin_free_irq(unsigned int irq, void *dev_id); +void call_isr(int irq, struct pt_regs * fp); +void blackfin_do_irq(int vec, struct pt_regs *fp); +void blackfin_init_IRQ(void); +void blackfin_enable_irq(unsigned int irq); +void blackfin_disable_irq(unsigned int irq); +extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); +int blackfin_request_irq(unsigned int irq, + void (*handler)(int, void *, struct pt_regs *), + unsigned long flags,const char *devname,void *dev_id); +void timer_init(void); +#endif diff --git a/cpu/bf533/flush.S b/cpu/bf533/flush.S new file mode 100644 index 0000000..1f9ec98 --- /dev/null +++ b/cpu/bf533/flush.S @@ -0,0 +1,402 @@ +/* Copyright (C) 2003 Analog Devices, Inc. All Rights Reserved. + * Copyright (C) 2004 LG SOft India. All Rights Reserved. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. + * + * Blackfin BF533/2.6 support : LG Soft India + */ +#define ASSEMBLY + +#include <asm/linkage.h> +#include <asm/cplb.h> +#include <asm/blackfin.h> + +.text + +/* This is an external function being called by the user + * application through __flush_cache_all. Currently this function + * serves the purpose of flushing all the pending writes in + * in the instruction cache. + */ + +ENTRY(flush_instruction_cache) + [--SP] = ( R7:6, P5:4 ); + LINK 12; + SP += -12; + P5.H = (ICPLB_ADDR0 >> 16); + P5.L = (ICPLB_ADDR0 & 0xFFFF); + P4.H = (ICPLB_DATA0 >> 16); + P4.L = (ICPLB_DATA0 & 0xFFFF); + R7 = CPLB_VALID | CPLB_L1_CHBL; + R6 = 16; +inext: R0 = [P5++]; + R1 = [P4++]; + [--SP] = RETS; + CALL icplb_flush; /* R0 = page, R1 = data*/ + RETS = [SP++]; +iskip: R6 += -1; + CC = R6; + IF CC JUMP inext; + SSYNC; + SP += 12; + UNLINK; + ( R7:6, P5:4 ) = [SP++]; + RTS; + +/* This is an internal function to flush all pending + * writes in the cache associated with a particular ICPLB. + * + * R0 - page's start address + * R1 - CPLB's data field. + */ + +.align 2 +ENTRY(icplb_flush) + [--SP] = ( R7:0, P5:0 ); + [--SP] = LC0; + [--SP] = LT0; + [--SP] = LB0; + [--SP] = LC1; + [--SP] = LT1; + [--SP] = LB1; + + /* If it's a 1K or 4K page, then it's quickest to + * just systematically flush all the addresses in + * the page, regardless of whether they're in the + * cache, or dirty. If it's a 1M or 4M page, there + * are too many addresses, and we have to search the + * cache for lines corresponding to the page. + */ + + CC = BITTST(R1, 17); /* 1MB or 4MB */ + IF !CC JUMP iflush_whole_page; + + /* We're only interested in the page's size, so extract + * this from the CPLB (bits 17:16), and scale to give an + * offset into the page_size and page_prefix tables. + */ + + R1 <<= 14; + R1 >>= 30; + R1 <<= 2; + + /* We can also determine the sub-bank used, because this is + * taken from bits 13:12 of the address. + */ + + R3 = ((12<<8)|2); /* Extraction pattern */ + nop; /*Anamoly 05000209*/ + R4 = EXTRACT(R0, R3.L) (Z); /* Extract bits*/ + R3.H = R4.L << 0 ; /* Save in extraction pattern for later deposit.*/ + + + /* So: + * R0 = Page start + * R1 = Page length (actually, offset into size/prefix tables) + * R3 = sub-bank deposit values + * + * The cache has 2 Ways, and 64 sets, so we iterate through + * the sets, accessing the tag for each Way, for our Bank and + * sub-bank, looking for dirty, valid tags that match our + * address prefix. + */ + + P5.L = (ITEST_COMMAND & 0xFFFF); + P5.H = (ITEST_COMMAND >> 16); + P4.L = (ITEST_DATA0 & 0xFFFF); + P4.H = (ITEST_DATA0 >> 16); + + P0.L = page_prefix_table; + P0.H = page_prefix_table; + P1 = R1; + R5 = 0; /* Set counter*/ + P0 = P1 + P0; + R4 = [P0]; /* This is the address prefix*/ + + /* We're reading (bit 1==0) the tag (bit 2==0), and we + * don't care about which double-word, since we're only + * fetching tags, so we only have to set Set, Bank, + * Sub-bank and Way. + */ + + P2 = 4; + LSETUP (ifs1, ife1) LC1 = P2; +ifs1: P0 = 32; /* iterate over all sets*/ + LSETUP (ifs0, ife0) LC0 = P0; +ifs0: R6 = R5 << 5; /* Combine set*/ + R6.H = R3.H << 0 ; /* and sub-bank*/ + [P5] = R6; /* Issue Command*/ + SSYNC; /* CSYNC will not work here :(*/ + R7 = [P4]; /* and read Tag.*/ + CC = BITTST(R7, 0); /* Check if valid*/ + IF !CC JUMP ifskip; /* and skip if not.*/ + + /* Compare against the page address. First, plant bits 13:12 + * into the tag, since those aren't part of the returned data. + */ + + R7 = DEPOSIT(R7, R3); /* set 13:12*/ + R1 = R7 & R4; /* Mask off lower bits*/ + CC = R1 == R0; /* Compare against page start.*/ + IF !CC JUMP ifskip; /* Skip it if it doesn't match.*/ + + /* Tag address matches against page, so this is an entry + * we must flush. + */ + + R7 >>= 10; /* Mask off the non-address bits*/ + R7 <<= 10; + P3 = R7; + IFLUSH [P3]; /* And flush the entry*/ +ifskip: +ife0: R5 += 1; /* Advance to next Set*/ +ife1: NOP; + +ifinished: + SSYNC; /* Ensure the data gets out to mem.*/ + + /*Finished. Restore context.*/ + LB1 = [SP++]; + LT1 = [SP++]; + LC1 = [SP++]; + LB0 = [SP++]; + LT0 = [SP++]; + LC0 = [SP++]; + ( R7:0, P5:0 ) = [SP++]; + RTS; + +iflush_whole_page: + /* It's a 1K or 4K page, so quicker to just flush the + * entire page. + */ + + P1 = 32; /* For 1K pages*/ + P2 = P1 << 2; /* For 4K pages*/ + P0 = R0; /* Start of page*/ + CC = BITTST(R1, 16); /* Whether 1K or 4K*/ + IF CC P1 = P2; + P1 += -1; /* Unroll one iteration*/ + SSYNC; + IFLUSH [P0++]; /* because CSYNC can't end loops.*/ + LSETUP (isall, ieall) LC0 = P1; +isall:IFLUSH [P0++]; +ieall: NOP; + SSYNC; + JUMP ifinished; + +/* This is an external function being called by the user + * application through __flush_cache_all. Currently this function + * serves the purpose of flushing all the pending writes in + * in the data cache. + */ + +ENTRY(flush_data_cache) + [--SP] = ( R7:6, P5:4 ); + LINK 12; + SP += -12; + P5.H = (DCPLB_ADDR0 >> 16); + P5.L = (DCPLB_ADDR0 & 0xFFFF); + P4.H = (DCPLB_DATA0 >> 16); + P4.L = (DCPLB_DATA0 & 0xFFFF); + R7 = CPLB_VALID | CPLB_L1_CHBL | CPLB_DIRTY (Z); + R6 = 16; +next: R0 = [P5++]; + R1 = [P4++]; + CC = BITTST(R1, 14); /* Is it write-through?*/ + IF CC JUMP skip; /* If so, ignore it.*/ + R2 = R1 & R7; /* Is it a dirty, cached page?*/ + CC = R2; + IF !CC JUMP skip; /* If not, ignore it.*/ + [--SP] = RETS; + CALL dcplb_flush; /* R0 = page, R1 = data*/ + RETS = [SP++]; +skip: R6 += -1; + CC = R6; + IF CC JUMP next; + SSYNC; + SP += 12; + UNLINK; + ( R7:6, P5:4 ) = [SP++]; + RTS; + +/* This is an internal function to flush all pending + * writes in the cache associated with a particular DCPLB. + * + * R0 - page's start address + * R1 - CPLB's data field. + */ + +.align 2 +ENTRY(dcplb_flush) + [--SP] = ( R7:0, P5:0 ); + [--SP] = LC0; + [--SP] = LT0; + [--SP] = LB0; + [--SP] = LC1; + [--SP] = LT1; + [--SP] = LB1; + + /* If it's a 1K or 4K page, then it's quickest to + * just systematically flush all the addresses in + * the page, regardless of whether they're in the + * cache, or dirty. If it's a 1M or 4M page, there + * are too many addresses, and we have to search the + * cache for lines corresponding to the page. + */ + + CC = BITTST(R1, 17); /* 1MB or 4MB */ + IF !CC JUMP dflush_whole_page; + + /* We're only interested in the page's size, so extract + * this from the CPLB (bits 17:16), and scale to give an + * offset into the page_size and page_prefix tables. + */ + + R1 <<= 14; + R1 >>= 30; + R1 <<= 2; + + /* The page could be mapped into Bank A or Bank B, depending + * on (a) whether both banks are configured as cache, and + * (b) on whether address bit A[x] is set. x is determined + * by DCBS in DMEM_CONTROL + */ + + R2 = 0; /* Default to Bank A (Bank B would be 1)*/ + + P0.L = (DMEM_CONTROL & 0xFFFF); + P0.H = (DMEM_CONTROL >> 16); + + R3 = [P0]; /* If Bank B is not enabled as cache*/ + CC = BITTST(R3, 2); /* then Bank A is our only option.*/ + IF CC JUMP bank_chosen; + + R4 = 1<<14; /* If DCBS==0, use A[14].*/ + R5 = R4 << 7; /* If DCBS==1, use A[23];*/ + CC = BITTST(R3, 4); + IF CC R4 = R5; /* R4 now has either bit 14 or bit 23 set.*/ + R5 = R0 & R4; /* Use it to test the Page address*/ + CC = R5; /* and if that bit is set, we use Bank B,*/ + R2 = CC; /* else we use Bank A.*/ + R2 <<= 23; /* The Bank selection's at posn 23.*/ + +bank_chosen: + + /* We can also determine the sub-bank used, because this is + * taken from bits 13:12 of the address. + */ + + R3 = ((12<<8)|2); /* Extraction pattern */ + nop; /*Anamoly 05000209*/ + R4 = EXTRACT(R0, R3.L) (Z); /* Extract bits*/ + R3.H = R4.L << 0 ; /* Save in extraction pattern for later deposit.*/ + + /* So: + * R0 = Page start + * R1 = Page length (actually, offset into size/prefix tables) + * R2 = Bank select mask + * R3 = sub-bank deposit values + * + * The cache has 2 Ways, and 64 sets, so we iterate through + * the sets, accessing the tag for each Way, for our Bank and + * sub-bank, looking for dirty, valid tags that match our + * address prefix. + */ + + P5.L = (DTEST_COMMAND & 0xFFFF); + P5.H = (DTEST_COMMAND >> 16); + P4.L = (DTEST_DATA0 & 0xFFFF); + P4.H = (DTEST_DATA0 >> 16); + + P0.L = page_prefix_table; + P0.H = page_prefix_table; + P1 = R1; + R5 = 0; /* Set counter*/ + P0 = P1 + P0; + R4 = [P0]; /* This is the address prefix*/ + + + /* We're reading (bit 1==0) the tag (bit 2==0), and we + * don't care about which double-word, since we're only + * fetching tags, so we only have to set Set, Bank, + * Sub-bank and Way. + */ + + P2 = 2; + LSETUP (fs1, fe1) LC1 = P2; +fs1: P0 = 64; /* iterate over all sets*/ + LSETUP (fs0, fe0) LC0 = P0; +fs0: R6 = R5 << 5; /* Combine set*/ + R6.H = R3.H << 0 ; /* and sub-bank*/ + R6 = R6 | R2; /* and Bank. Leave Way==0 at first.*/ + BITSET(R6,14); + [P5] = R6; /* Issue Command*/ + SSYNC; + R7 = [P4]; /* and read Tag.*/ + CC = BITTST(R7, 0); /* Check if valid*/ + IF !CC JUMP fskip; /* and skip if not.*/ + CC = BITTST(R7, 1); /* Check if dirty*/ + IF !CC JUMP fskip; /* and skip if not.*/ + + /* Compare against the page address. First, plant bits 13:12 + * into the tag, since those aren't part of the returned data. + */ + + R7 = DEPOSIT(R7, R3); /* set 13:12*/ + R1 = R7 & R4; /* Mask off lower bits*/ + CC = R1 == R0; /* Compare against page start.*/ + IF !CC JUMP fskip; /* Skip it if it doesn't match.*/ + + /* Tag address matches against page, so this is an entry + * we must flush. + */ + + R7 >>= 10; /* Mask off the non-address bits*/ + R7 <<= 10; + P3 = R7; + SSYNC; + FLUSHINV [P3]; /* And flush the entry*/ +fskip: +fe0: R5 += 1; /* Advance to next Set*/ +fe1: BITSET(R2, 26); /* Go to next Way.*/ + +dfinished: + SSYNC; /* Ensure the data gets out to mem.*/ + + /*Finished. Restore context.*/ + LB1 = [SP++]; + LT1 = [SP++]; + LC1 = [SP++]; + LB0 = [SP++]; + LT0 = [SP++]; + LC0 = [SP++]; + ( R7:0, P5:0 ) = [SP++]; + RTS; + +dflush_whole_page: + + /* It's a 1K or 4K page, so quicker to just flush the + * entire page. + */ + + P1 = 32; /* For 1K pages*/ + P2 = P1 << 2; /* For 4K pages*/ + P0 = R0; /* Start of page*/ + CC = BITTST(R1, 16); /* Whether 1K or 4K*/ + IF CC P1 = P2; + P1 += -1; /* Unroll one iteration*/ + SSYNC; + FLUSHINV [P0++]; /* because CSYNC can't end loops.*/ + LSETUP (eall, eall) LC0 = P1; +eall: FLUSHINV [P0++]; + SSYNC; + JUMP dfinished; + +.align 4; +page_prefix_table: +.byte4 0xFFFFFC00; /* 1K */ +.byte4 0xFFFFF000; /* 4K */ +.byte4 0xFFF00000; /* 1M */ +.byte4 0xFFC00000; /* 4M */ +.page_prefix_table.end: diff --git a/cpu/bf533/interrupt.S b/cpu/bf533/interrupt.S new file mode 100644 index 0000000..b4d2579 --- /dev/null +++ b/cpu/bf533/interrupt.S @@ -0,0 +1,391 @@ +/* + * U-boot - interrupt.S Processing of interrupts and exception handling + * + * Copyright (c) 2005 blackfin.uclinux.org + * + * (C) Copyright 2000-2004 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * This file is based on interrupt.S + * + * Copyright (C) 2003 Metrowerks, Inc. <mwaddel@metrowerks.com> + * Copyright (C) 2002 Arcturus Networks Ltd. Ted Ma <mated@sympatico.ca> + * Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>, + * Kenneth Albanowski <kjahds@kjahds.com>, + * The Silver Hammer Group, Ltd. + * + * (c) 1995, Dionne & Associates + * (c) 1995, DKG Display Tech. + * + * This file is also based on exception.asm + * (C) Copyright 2001-2005 - Analog Devices, Inc. All rights reserved. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#define ASSEMBLY + +#include <asm/hw_irq.h> +#include <asm/entry.h> +#include <asm/blackfin_defs.h> +#include <asm/cpu/bf533_irq.h> + +.global blackfin_irq_panic; + +.text +.align 2 + +#ifndef CONFIG_KGDB +.global evt_emulation +evt_emulation: + SAVE_CONTEXT + r0 = IRQ_EMU; + r1 = seqstat; + sp += -12; + call blackfin_irq_panic; + sp += 12; + rte; +#endif + +.global evt_nmi +evt_nmi: + SAVE_CONTEXT + r0 = IRQ_NMI; + r1 = RETN; + sp += -12; + call blackfin_irq_panic; + sp += 12; + +_evt_nmi_exit: + rtn; + +.global trap +trap: + [--sp] = r0; + [--sp] = r1; + [--sp] = p0; + [--sp] = p1; + [--sp] = astat; + r0 = seqstat; + R0 <<= 26; + R0 >>= 26; + p0 = r0; + p1.l = EVTABLE; + p1.h = EVTABLE; + p0 = p1 + (p0 << 1); + r1 = W[p0] (Z); + p1 = r1; + jump (pc + p1); + +.global _EVENT1 +_EVENT1: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT2 +_EVENT2: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT3 +_EVENT3: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT4 +_EVENT4: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT5 +_EVENT5: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT6 +_EVENT6: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT7 +_EVENT7: + RAISE 15; + JUMP.S _EXIT; + +.global _EVENT8 +_EVENT8: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT9 +_EVENT9: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT10 +_EVENT10: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT11 +_EVENT11: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT12 +_EVENT12: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT13 +_EVENT13: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT14 +_EVENT14: +/* RAISE 14; */ + CALL _cplb_hdr; + JUMP.S _EXIT; + +.global _EVENT19 +_EVENT19: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT20 +_EVENT20: + RAISE 14; + JUMP.S _EXIT; + +.global _EVENT21 +_EVENT21: + RAISE 14; + JUMP.S _EXIT; + +.global _EXIT +_EXIT: + ASTAT = [sp++]; + p1 = [sp++]; + p0 = [sp++]; + r1 = [sp++]; + r0 = [sp++]; + RTX; + +EVTABLE: + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x0000; + .byte2 0x003E; + .byte2 0x0042; + .byte4 0x0000; + .byte4 0x0000; + .byte4 0x0000; + .byte4 0x0000; + .byte4 0x0000; + .byte4 0x0000; + .byte4 0x0000; + .byte2 0x0000; + .byte2 0x001E; + .byte2 0x0022; + .byte2 0x0032; + .byte2 0x002e; + .byte2 0x0002; + .byte2 0x0036; + .byte2 0x002A; + .byte2 0x001A; + .byte2 0x0016; + .byte2 0x000A; + .byte2 0x000E; + .byte2 0x0012; + .byte2 0x0006; + .byte2 0x0026; + +.global evt_rst +evt_rst: + SAVE_CONTEXT + r0 = IRQ_RST; + r1 = RETN; + sp += -12; + call do_reset; + sp += 12; + +_evt_rst_exit: + rtn; + +irq_panic: + r0 = IRQ_EVX; + r1 = sp; + sp += -12; + call blackfin_irq_panic; + sp += 12; + +.global evt_ivhw +evt_ivhw: + SAVE_CONTEXT + RAISE 14; + +_evt_ivhw_exit: + rti; + +.global evt_timer +evt_timer: + SAVE_CONTEXT + r0 = IRQ_CORETMR; + sp += -12; + /* Polling method used now. */ + /* call timer_int; */ + sp += 12; + RESTORE_CONTEXT + rti; + nop; + +.global evt_evt7 +evt_evt7: + SAVE_CONTEXT + r0 = 7; + sp += -12; + call process_int; + sp += 12; + +evt_evt7_exit: + RESTORE_CONTEXT + rti; + +.global evt_evt8 +evt_evt8: + SAVE_CONTEXT + r0 = 8; + sp += -12; + call process_int; + sp += 12; + +evt_evt8_exit: + RESTORE_CONTEXT + rti; + +.global evt_evt9 +evt_evt9: + SAVE_CONTEXT + r0 = 9; + sp += -12; + call process_int; + sp += 12; + +evt_evt9_exit: + RESTORE_CONTEXT + rti; + +.global evt_evt10 +evt_evt10: + SAVE_CONTEXT + r0 = 10; + sp += -12; + call process_int; + sp += 12; + +evt_evt10_exit: + RESTORE_CONTEXT + rti; + +.global evt_evt11 +evt_evt11: + SAVE_CONTEXT + r0 = 11; + sp += -12; + call process_int; + sp += 12; + +evt_evt11_exit: + RESTORE_CONTEXT + rti; + +.global evt_evt12 +evt_evt12: + SAVE_CONTEXT + r0 = 12; + sp += -12; + call process_int; + sp += 12; +evt_evt12_exit: + RESTORE_CONTEXT + rti; + +.global evt_evt13 +evt_evt13: + SAVE_CONTEXT + r0 = 13; + sp += -12; + call process_int; + sp += 12; + +evt_evt13_exit: + RESTORE_CONTEXT + rti; + +.global evt_system_call +evt_system_call: + [--sp] = r0; + [--SP] = RETI; + r0 = [sp++]; + r0 += 2; + [--sp] = r0; + RETI = [SP++]; + r0 = [SP++]; + SAVE_CONTEXT + sp += -12; + call display_excp; + sp += 12; + RESTORE_CONTEXT + RTI; + +evt_system_call_exit: + rti; + +.global evt_soft_int1 +evt_soft_int1: + [--sp] = r0; + [--SP] = RETI; + r0 = [sp++]; + r0 += 2; + [--sp] = r0; + RETI = [SP++]; + r0 = [SP++]; + SAVE_CONTEXT + sp += -12; + call display_excp; + sp += 12; + RESTORE_CONTEXT + RTI; + +evt_soft_int1_exit: + rti; diff --git a/cpu/bf533/interrupts.c b/cpu/bf533/interrupts.c new file mode 100644 index 0000000..df1a25e --- /dev/null +++ b/cpu/bf533/interrupts.c @@ -0,0 +1,165 @@ +/* + * U-boot - interrupts.c Interrupt related routines + * + * Copyright (c) 2005 blackfin.uclinux.org + * + * This file is based on interrupts.c + * Copyright 1996 Roman Zippel + * Copyright 1999 D. Jeff Dionne <jeff@uclinux.org> + * Copyright 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca> + * Copyright 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca> + * Copyright 2003 Metrowerks/Motorola + * Copyright 2003 Bas Vermeulen <bas@buyways.nl>, + * BuyWays B.V. (www.buyways.nl) + * + * (C) Copyright 2000-2004 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/machdep.h> +#include <asm/irq.h> +#include <asm/cpu/defBF533.h> +#include "cpu.h" + +static ulong timestamp; +static ulong last_time; +static int int_flag; + +int irq_flags; /* needed by asm-blackfin/system.h */ + +/* Functions just to satisfy the linker */ + +/* + * This function is derived from PowerPC code (read timebase as long long). + * On BF533 it just returns the timer value. + */ +unsigned long long get_ticks(void) +{ + return get_timer(0); +} + +/* + * This function is derived from PowerPC code (timebase clock frequency). + * On BF533 it returns the number of timer ticks per second. + */ +ulong get_tbclk (void) +{ + ulong tbclk; + + tbclk = CFG_HZ; + return tbclk; +} + +void enable_interrupts(void) +{ + restore_flags(int_flag); +} + +int disable_interrupts(void) +{ + save_and_cli(int_flag); + return 1; +} + +int interrupt_init(void) +{ + return (0); +} + +void udelay(unsigned long usec) +{ + unsigned long delay, start, stop; + unsigned long cclk; + cclk = (CONFIG_CCLK_HZ); + + while ( usec > 1 ) { + /* + * how many clock ticks to delay? + * - request(in useconds) * clock_ticks(Hz) / useconds/second + */ + if (usec < 1000) { + delay = (usec * (cclk/244)) >> 12 ; + usec = 0; + } else { + delay = (1000 * (cclk/244)) >> 12 ; + usec -= 1000; + } + + asm volatile (" %0 = CYCLES;": "=g"(start)); + do { + asm volatile (" %0 = CYCLES; ": "=g"(stop)); + } while (stop - start < delay); + } + + return; +} + +void timer_init(void) +{ + *pTCNTL = 0x1; + *pTSCALE = 0x0; + *pTCOUNT = MAX_TIM_LOAD; + *pTPERIOD = MAX_TIM_LOAD; + *pTCNTL = 0x7; + asm("CSYNC;"); + + timestamp = 0; + last_time = 0; +} + +/* Any network command or flash + * command is started get_timer shall + * be called before TCOUNT gets reset, + * to implement the accurate timeouts. + * + * How ever milliconds doesn't return + * the number that has been elapsed from + * the last reset. + * + * As get_timer is used in the u-boot + * only for timeouts this should be + * sufficient + */ +ulong get_timer(ulong base) +{ + ulong milisec; + + /* Number of clocks elapsed */ + ulong clocks = (MAX_TIM_LOAD - (*pTCOUNT)); + + /* Find if the TCOUNT is reset + timestamp gives the number of times + TCOUNT got reset */ + if(clocks < last_time) + timestamp++; + last_time = clocks; + + /* Get the number of milliseconds */ + milisec = clocks/(CONFIG_CCLK_HZ / 1000); + + /* Find the number of millisonds + that got elapsed before this TCOUNT + cycle */ + milisec += timestamp * (MAX_TIM_LOAD/(CONFIG_CCLK_HZ / 1000)); + + return (milisec - base); +} diff --git a/cpu/bf533/ints.c b/cpu/bf533/ints.c new file mode 100644 index 0000000..859f4b2 --- /dev/null +++ b/cpu/bf533/ints.c @@ -0,0 +1,107 @@ +/* + * U-boot - ints.c Interrupt related routines + * + * Copyright (c) 2005 blackfin.uclinux.org + * + * This file is based on ints.c + * + * Apr18 2003, Changed by HuTao to support interrupt cascading for Blackfin + * drivers + * + * Copyright 1996 Roman Zippel + * Copyright 1999 D. Jeff Dionne <jeff@uclinux.org> + * Copyright 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca> + * Copyright 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca> + * Copyright 2003 Metrowerks/Motorola + * + * (C) Copyright 2000-2004 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <linux/stddef.h> +#include <asm/system.h> +#include <asm/irq.h> +#include <asm/traps.h> +#include <asm/io.h> +#include <asm/errno.h> +#include <asm/machdep.h> +#include <asm/setup.h> +#include <asm/blackfin.h> +#include "cpu.h" + +void blackfin_irq_panic(int reason, struct pt_regs *regs) +{ + printf("\n\nException: IRQ 0x%x entered\n", reason); + printf("code=[0x%x], ", (unsigned int) (regs->seqstat & 0x3f)); + printf("stack frame=0x%x, ", (unsigned int) regs); + printf("bad PC=0x%04x\n", (unsigned int) regs->pc); + dump(regs); + printf("Unhandled IRQ or exceptions!\n"); + printf("Please reset the board \n"); +} + +void blackfin_init_IRQ(void) +{ + *(unsigned volatile long *) (SIC_IMASK) = SIC_UNMASK_ALL; + cli(); +#ifndef CONFIG_KGDB + *(unsigned volatile long *) (EVT_EMULATION_ADDR) = 0x0; +#endif + *(unsigned volatile long *) (EVT_NMI_ADDR) = + (unsigned volatile long) evt_nmi; + *(unsigned volatile long *) (EVT_EXCEPTION_ADDR) = + (unsigned volatile long) trap; + *(unsigned volatile long *) (EVT_HARDWARE_ERROR_ADDR) = + (unsigned volatile long) evt_ivhw; + *(unsigned volatile long *) (EVT_RESET_ADDR) = + (unsigned volatile long) evt_rst; + *(unsigned volatile long *) (EVT_TIMER_ADDR) = + (unsigned volatile long) evt_timer; + *(unsigned volatile long *) (EVT_IVG7_ADDR) = + (unsigned volatile long) evt_evt7; + *(unsigned volatile long *) (EVT_IVG8_ADDR) = + (unsigned volatile long) evt_evt8; + *(unsigned volatile long *) (EVT_IVG9_ADDR) = + (unsigned volatile long) evt_evt9; + *(unsigned volatile long *) (EVT_IVG10_ADDR) = + (unsigned volatile long) evt_evt10; + *(unsigned volatile long *) (EVT_IVG11_ADDR) = + (unsigned volatile long) evt_evt11; + *(unsigned volatile long *) (EVT_IVG12_ADDR) = + (unsigned volatile long) evt_evt12; + *(unsigned volatile long *) (EVT_IVG13_ADDR) = + (unsigned volatile long) evt_evt13; + *(unsigned volatile long *) (EVT_IVG14_ADDR) = + (unsigned volatile long) evt_system_call; + *(unsigned volatile long *) (EVT_IVG15_ADDR) = + (unsigned volatile long) evt_soft_int1; + *(volatile unsigned long *) ILAT = 0; + asm("csync;"); + sti(); + *(volatile unsigned long *) IMASK = 0xffbf; + asm("csync;"); +} + +void display_excp(void) +{ + printf("Exception!\n"); +} diff --git a/cpu/bf533/serial.c b/cpu/bf533/serial.c new file mode 100644 index 0000000..8f0cd16 --- /dev/null +++ b/cpu/bf533/serial.c @@ -0,0 +1,194 @@ +/* + * U-boot - serial.c Serial driver for BF533 + * + * Copyright (c) 2005 blackfin.uclinux.org + * + * This file is based on + * bf533_serial.c: Serial driver for BlackFin BF533 DSP internal UART. + * Copyright (c) 2003 Bas Vermeulen <bas@buyways.nl>, + * BuyWays B.V. (www.buyways.nl) + * + * Based heavily on blkfinserial.c + * blkfinserial.c: Serial driver for BlackFin DSP internal USRTs. + * Copyright(c) 2003 Metrowerks <mwaddel@metrowerks.com> + * Copyright(c) 2001 Tony Z. Kou <tonyko@arcturusnetworks.com> + * Copyright(c) 2001-2002 Arcturus Networks Inc. <www.arcturusnetworks.com> + * + * Based on code from 68328 version serial driver imlpementation which was: + * Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu> + * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> + * Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org> + * Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com> + * + * (C) Copyright 2000-2004 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/irq.h> +#include <asm/system.h> +#include <asm/segment.h> +#include <asm/bitops.h> +#include <asm/delay.h> +#include <asm/uaccess.h> +#include "bf533_serial.h" + +unsigned long pll_div_fact; + +void calc_baud(void) +{ + unsigned char i; + int temp; + + for(i = 0; i < sizeof(baud_table)/sizeof(int); i++) { + temp = CONFIG_SCLK_HZ/(baud_table[i]*8); + if ( temp && 0x1 == 1 ) { + temp++; + } + temp = temp/2; + hw_baud_table[i].dl_high = (temp >> 8)& 0xFF; + hw_baud_table[i].dl_low = (temp) & 0xFF; + } +} + +void serial_setbrg(void) +{ + int i; + DECLARE_GLOBAL_DATA_PTR; + + calc_baud(); + + for (i = 0; i < sizeof(baud_table) / sizeof(int); i++) { + if (gd->baudrate == baud_table[i]) + break; + } + + /* Enable UART */ + *pUART_GCTL |= UART_GCTL_UCEN; + asm("ssync;"); + + /* Set DLAB in LCR to Access DLL and DLH */ + ACCESS_LATCH; + asm("ssync;"); + + *pUART_DLL = hw_baud_table[i].dl_low; + asm("ssync;"); + *pUART_DLH = hw_baud_table[i].dl_high; + asm("ssync;"); + + /* Clear DLAB in LCR to Access THR RBR IER */ + ACCESS_PORT_IER; + asm("ssync;"); + + /* Enable ERBFI and ELSI interrupts + * to poll SIC_ISR register*/ + *pUART_IER = UART_IER_ELSI | UART_IER_ERBFI | UART_IER_ETBEI; + asm("ssync;"); + + /* Set LCR to Word Lengh 8-bit word select */ + *pUART_LCR = UART_LCR_WLS8; + asm("ssync;"); + + return; +} + +int serial_init(void) +{ + serial_setbrg(); + return (0); +} + +void serial_putc(const char c) +{ + if ((*pUART_LSR) & UART_LSR_TEMT) + { + if (c == '\n') + serial_putc('\r'); + + local_put_char(c); + } + + while (!((*pUART_LSR) & UART_LSR_TEMT)) + SYNC_ALL; + + return; +} + +int serial_tstc(void) +{ + if (*pUART_LSR & UART_LSR_DR) + return 1; + else + return 0; +} + +int serial_getc(void) +{ + unsigned short uart_lsr_val, uart_rbr_val; + unsigned long isr_val; + int ret; + + /* Poll for RX Interrupt */ + while (!((isr_val = *(volatile unsigned long *)SIC_ISR) & IRQ_UART_RX_BIT)); + asm("csync;"); + + uart_lsr_val = *pUART_LSR; /* Clear status bit */ + uart_rbr_val = *pUART_RBR; /* getc() */ + + if (isr_val & IRQ_UART_ERROR_BIT) { + ret = -1; + } + else + { + ret = uart_rbr_val & 0xff; + } + + return ret; +} + +void serial_puts(const char *s) +{ + while (*s) { + serial_putc(*s++); + } +} + +static void local_put_char(char ch) +{ + int flags = 0; + unsigned long isr_val; + + save_and_cli(flags); + + /* Poll for TX Interruput */ + while (!((isr_val = *pSIC_ISR) & IRQ_UART_TX_BIT)); + asm("csync;"); + + *pUART_THR = ch; /* putc() */ + + if (isr_val & IRQ_UART_ERROR_BIT) { + printf("?"); + } + + restore_flags(flags); + + return ; +} diff --git a/cpu/bf533/start.S b/cpu/bf533/start.S new file mode 100644 index 0000000..7414d88 --- /dev/null +++ b/cpu/bf533/start.S @@ -0,0 +1,435 @@ +/* + * U-boot - start.S Startup file of u-boot for BF533 + * + * Copyright (c) 2005 blackfin.uclinux.org + * + * This file is based on head.S + * Copyright (c) 2003 Metrowerks/Motorola + * Copyright (C) 1998 D. Jeff Dionne <jeff@ryeham.ee.ryerson.ca>, + * Kenneth Albanowski <kjahds@kjahds.com>, + * The Silver Hammer Group, Ltd. + * (c) 1995, Dionne & Associates + * (c) 1995, DKG Display Tech. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* + * Note: A change in this file subsequently requires a change in + * board/$(board_name)/config.mk for a valid u-boot.bin + */ + +#define ASSEMBLY + +#include <linux/config.h> +#include <asm/blackfin.h> +#include <config.h> +#include <asm/mem_init.h> + +#if (CONFIG_CCLK_DIV == 1) +#define CONFIG_CCLK_ACT_DIV CCLK_DIV1 +#endif +#if (CONFIG_CCLK_DIV == 2) +#define CONFIG_CCLK_ACT_DIV CCLK_DIV2 +#endif +#if (CONFIG_CCLK_DIV == 4) +#define CONFIG_CCLK_ACT_DIV CCLK_DIV4 +#endif +#if (CONFIG_CCLK_DIV == 8) +#define CONFIG_CCLK_ACT_DIV CCLK_DIV8 +#endif +#ifndef CONFIG_CCLK_ACT_DIV +#define CONFIG_CCLK_ACT_DIV CONFIG_CCLK_DIV_not_defined_properly +#endif + +.global _stext; +.global __bss_start; +.global start; +.global _start; +.global _rambase; +.global _ramstart; +.global _ramend; +.global _bf533_data_dest; +.global _bf533_data_size; +.global edata; +.global _initialize; +.global _exit; +.global flashdataend; + +.text +_start: +start: +_stext: + + R0 = 0x30; + SYSCFG = R0; + SSYNC; + + /* As per HW reference manual DAG registers, + * DATA and Address resgister shall be zero'd + * in initialization, after a reset state + */ + r1 = 0; /* Data registers zero'd */ + r2 = 0; + r3 = 0; + r4 = 0; + r5 = 0; + r6 = 0; + r7 = 0; + + p0 = 0; /* Address registers zero'd */ + p1 = 0; + p2 = 0; + p3 = 0; + p4 = 0; + p5 = 0; + + i0 = 0; /* DAG Registers zero'd */ + i1 = 0; + i2 = 0; + i3 = 0; + m0 = 0; + m1 = 0; + m3 = 0; + m3 = 0; + l0 = 0; + l1 = 0; + l2 = 0; + l3 = 0; + b0 = 0; + b1 = 0; + b2 = 0; + b3 = 0; + + /* Set loop counters to zero, to make sure that + * hw loops are disabled. + */ + lc0 = 0; + lc1 = 0; + + SSYNC; + + /* Check soft reset status */ + p0.h = SWRST >> 16; + p0.l = SWRST & 0xFFFF; + r0.l = w[p0]; + + cc = bittst(r0, 15); + if !cc jump no_soft_reset; + + /* Clear Soft reset */ + r0 = 0x0000; + w[p0] = r0; + ssync; + +no_soft_reset: + nop; + + /* Clear EVT registers */ + p0.h = (EVT_EMULATION_ADDR >> 16); + p0.l = (EVT_EMULATION_ADDR & 0xFFFF); + p0 += 8; + p1 = 14; + r1 = 0; + LSETUP(4,4) lc0 = p1; + [ p0 ++ ] = r1; + + /* + * Set PLL_CTL + * - [14:09] = MSEL[5:0] : CLKIN / VCO multiplication factors + * - [8] = BYPASS : BYPASS the PLL, run CLKIN into CCLK/SCLK + * - [7] = output delay (add 200ps of delay to mem signals) + * - [6] = input delay (add 200ps of input delay to mem signals) + * - [5] = PDWN : 1=All Clocks off + * - [3] = STOPCK : 1=Core Clock off + * - [1] = PLL_OFF : 1=Disable Power to PLL + * - [0] = DF : 1=Pass CLKIN/2 to PLL / 0=Pass CLKIN to PLL + * all other bits set to zero + */ + + r0 = CONFIG_VCO_MULT; /* Load the VCO multiplier */ + r0 = r0 << 9; /* Shift it over */ + r1 = CONFIG_CLKIN_HALF; /* Do we need to divide CLKIN by 2? */ + r0 = r1 | r0; + r1 = CONFIG_PLL_BYPASS; /* Bypass the PLL? */ + r1 = r1 << 8; /* Shift it over */ + r0 = r1 | r0; /* add them all together */ + + p0.h = (PLL_CTL >> 16); + p0.l = (PLL_CTL & 0xFFFF); /* Load the address */ + cli r2; /* Disable interrupts */ + w[p0] = r0; /* Set the value */ + idle; /* Wait for the PLL to stablize */ + sti r2; /* Enable interrupts */ + ssync; + + /* + * Turn on the CYCLES COUNTER + */ + r2 = SYSCFG; + BITSET (r2,1); + SYSCFG = r2; + + /* Configure SCLK & CCLK Dividers */ + r0 = CONFIG_CCLK_ACT_DIV | CONFIG_SCLK_DIV; + p0.h = (PLL_DIV >> 16); + p0.l = (PLL_DIV & 0xFFFF); + w[p0] = r0; + ssync; + +wait_for_pll_stab: + p0.h = (PLL_STAT >> 16); + p0.l = (PLL_STAT & 0xFFFF); + r0.l = w[p0]; + cc = bittst(r0,5); + if !cc jump wait_for_pll_stab; + + /* Configure SDRAM if SDRAM is already not enabled */ + p0.l = (EBIU_SDSTAT & 0xFFFF); + p0.h = (EBIU_SDSTAT >> 16); + r0.l = w[p0]; + cc = bittst(r0, 3); + if !cc jump skip_sdram_enable; + + /* SDRAM initialization */ + p0.l = (EBIU_SDGCTL & 0xFFFF); + p0.h = (EBIU_SDGCTL >> 16); /* SDRAM Memory Global Control Register */ + r0.h = (mem_SDGCTL >> 16); + r0.l = (mem_SDGCTL & 0xFFFF); + [p0] = r0; + ssync; + + p0.l = (EBIU_SDBCTL & 0xFFFF); + p0.h = (EBIU_SDBCTL >> 16); /* SDRAM Memory Bank Control Register */ + r0 = mem_SDBCTL; + w[p0] = r0.l; + ssync; + + p0.l = (EBIU_SDRRC & 0xFFFF); + p0.h = (EBIU_SDRRC >> 16); /* SDRAM Refresh Rate Control Register */ + r0 = mem_SDRRC; + w[p0] = r0.l; + ssync; + +skip_sdram_enable: + nop; + +#ifndef CFG_NO_FLASH + /* relocate into to RAM */ + p1.l = (CFG_FLASH_BASE & 0xffff); + p1.h = (CFG_FLASH_BASE >> 16); + p2.l = (CFG_MONITOR_BASE & 0xffff); + p2.h = (CFG_MONITOR_BASE >> 16); + r0.l = (CFG_MONITOR_LEN & 0xffff); + r0.h = (CFG_MONITOR_LEN >> 16); +loop1: + r1 = [p1]; + [p2] = r1; + p3=0x4; + p1=p1+p3; + p2=p2+p3; + r2=0x4; + r0=r0-r2; + cc=r0==0x0; + if !cc jump loop1; +#endif + /* + * configure STACK + */ + r0.h = (CONFIG_STACKBASE >> 16); + r0.l = (CONFIG_STACKBASE & 0xFFFF); + sp = r0; + fp = sp; + + /* + * This next section keeps the processor in supervisor mode + * during kernel boot. Switches to user mode at end of boot. + * See page 3-9 of Hardware Reference manual for documentation. + */ + + /* To keep ourselves in the supervisor mode */ + p0.l = (EVT_IVG15_ADDR & 0xFFFF); + p0.h = (EVT_IVG15_ADDR >> 16); + + p1.l = _real_start; + p1.h = _real_start; + [p0] = p1; + + p0.l = (IMASK & 0xFFFF); + p0.h = (IMASK >> 16); + r0 = IVG15_POS; + [p0] = r0; + raise 15; + p0.l = WAIT_HERE; + p0.h = WAIT_HERE; + reti = p0; + rti; + +WAIT_HERE: + jump WAIT_HERE; + +.global _real_start; +_real_start: + [ -- sp ] = reti; + +#ifdef CONFIG_EZKIT533 + p0.l = (WDOG_CTL & 0xFFFF); + p0.h = (WDOG_CTL >> 16); + r0 = WATCHDOG_DISABLE(z); + w[p0] = r0; +#endif + + /* Code for initializing Async mem banks */ + p2.h = (EBIU_AMBCTL1 >> 16); + p2.l = (EBIU_AMBCTL1 & 0xFFFF); + r0.h = (AMBCTL1VAL >> 16); + r0.l = (AMBCTL1VAL & 0xFFFF); + [p2] = r0; + ssync; + + p2.h = (EBIU_AMBCTL0 >> 16); + p2.l = (EBIU_AMBCTL0 & 0xFFFF); + r0.h = (AMBCTL0VAL >> 16); + r0.l = (AMBCTL0VAL & 0xFFFF); + [p2] = r0; + ssync; + + p2.h = (EBIU_AMGCTL >> 16); + p2.l = (EBIU_AMGCTL & 0xffff); + r0 = AMGCTLVAL; + w[p2] = r0; + ssync; + + /* DMA reset code to Hi of L1 SRAM */ +copy: + P1.H = hi(SYSMMR_BASE); /* P1 Points to the beginning of SYSTEM MMR Space */ + P1.L = lo(SYSMMR_BASE); + + R0.H = reset_start; /* Source Address (high) */ + R0.L = reset_start; /* Source Address (low) */ + R1.H = reset_end; + R1.L = reset_end; + R2 = R1 - R0; /* Count */ + R1.H = hi(L1_ISRAM); /* Destination Address (high) */ + R1.L = lo(L1_ISRAM); /* Destination Address (low) */ + R3.L = DMAEN; /* Source DMAConfig Value (8-bit words) */ + R4.L = (DI_EN | WNR | DMAEN); /* Destination DMAConfig Value (8-bit words) */ + +DMA: + R6 = 0x1 (Z); + W[P1+OFFSET_(MDMA_S0_X_MODIFY)] = R6; /* Source Modify = 1 */ + W[P1+OFFSET_(MDMA_D0_X_MODIFY)] = R6; /* Destination Modify = 1 */ + + [P1+OFFSET_(MDMA_S0_START_ADDR)] = R0; /* Set Source Base Address */ + W[P1+OFFSET_(MDMA_S0_X_COUNT)] = R2; /* Set Source Count */ + /* Set Source DMAConfig = DMA Enable, + Memory Read, 8-Bit Transfers, 1-D DMA, Flow - Stop */ + W[P1+OFFSET_(MDMA_S0_CONFIG)] = R3; + + [P1+OFFSET_(MDMA_D0_START_ADDR)] = R1; /* Set Destination Base Address */ + W[P1+OFFSET_(MDMA_D0_X_COUNT)] = R2; /* Set Destination Count */ + /* Set Destination DMAConfig = DMA Enable, + Memory Write, 8-Bit Transfers, 1-D DMA, Flow - Stop, IOC */ + W[P1+OFFSET_(MDMA_D0_CONFIG)] = R4; + + IDLE; /* Wait for DMA to Complete */ + + R0 = 0x1; + W[P1+OFFSET_(MDMA_D0_IRQ_STATUS)] = R0; /* Write 1 to clear DMA interrupt */ + + /* DMA reset code to DATA BANK A which uses this port + * to avoid following problem + * " Data from a Data Cache fill can be corrupoted after or during + * instruction DMA if certain core stalls exist" + */ + +copy_as_data: + R0.H = reset_start; /* Source Address (high) */ + R0.L = reset_start; /* Source Address (low) */ + R1.H = reset_end; + R1.L = reset_end; + R2 = R1 - R0; /* Count */ + R1.H = hi(DATA_BANKA_SRAM); /* Destination Address (high) */ + R1.L = lo(DATA_BANKA_SRAM); /* Destination Address (low) */ + R3.L = DMAEN; /* Source DMAConfig Value (8-bit words) */ + R4.L = (DI_EN | WNR | DMAEN); /* Destination DMAConfig Value (8-bit words) */ + +DMA_DATA: + R6 = 0x1 (Z); + W[P1+OFFSET_(MDMA_S0_X_MODIFY)] = R6; /* Source Modify = 1 */ + W[P1+OFFSET_(MDMA_D0_X_MODIFY)] = R6; /* Destination Modify = 1 */ + + [P1+OFFSET_(MDMA_S0_START_ADDR)] = R0; /* Set Source Base Address */ + W[P1+OFFSET_(MDMA_S0_X_COUNT)] = R2; /* Set Source Count */ + /* Set Source DMAConfig = DMA Enable, + Memory Read, 8-Bit Transfers, 1-D DMA, Flow - Stop */ + W[P1+OFFSET_(MDMA_S0_CONFIG)] = R3; + + [P1+OFFSET_(MDMA_D0_START_ADDR)] = R1; /* Set Destination Base Address */ + W[P1+OFFSET_(MDMA_D0_X_COUNT)] = R2; /* Set Destination Count */ + /* Set Destination DMAConfig = DMA Enable, + Memory Write, 8-Bit Transfers, 1-D DMA, Flow - Stop, IOC */ + W[P1+OFFSET_(MDMA_D0_CONFIG)] = R4; + + IDLE; /* Wait for DMA to Complete */ + + R0 = 0x1; + W[P1+OFFSET_(MDMA_D0_IRQ_STATUS)] = R0; /* Write 1 to clear DMA interrupt */ + +copy_end: nop; + + /* Initialize BSS Section with 0 s */ + p1.l = __bss_start; + p1.h = __bss_start; + p2.l = _end; + p2.h = _end; + r1 = p1; + r2 = p2; + r3 = r2 - r1; + r3 = r3 >> 2; + p3 = r3; + lsetup (_clear_bss, _clear_bss_end ) lc1 = p3; + CC = p2<=p1; + if CC jump _clear_bss_skip; + r0 = 0; +_clear_bss: +_clear_bss_end: + [p1++] = r0; +_clear_bss_skip: + + p0.l = _start1; + p0.h = _start1; + jump (p0); + +reset_start: + p0.h = WDOG_CNT >> 16; + p0.l = WDOG_CNT & 0xffff; + r0 = 0x0010; + w[p0] = r0; + p0.h = WDOG_CTL >> 16; + p0.l = WDOG_CTL & 0xffff; + r0 = 0x0000; + w[p0] = r0; +reset_wait: + jump reset_wait; + +reset_end: nop; + +_exit: + jump.s _exit; diff --git a/cpu/bf533/start1.S b/cpu/bf533/start1.S new file mode 100644 index 0000000..6f48124 --- /dev/null +++ b/cpu/bf533/start1.S @@ -0,0 +1,38 @@ +/* + * U-boot - start1.S Code running out of RAM after relocation + * + * Copyright (c) 2005 blackfin.uclinux.org + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#define ASSEMBLY +#include <linux/config.h> +#include <asm/blackfin.h> +#include <config.h> + +.global start1; +.global _start1; + +.text +_start1: +start1: + sp += -12; + call board_init_f; + sp += 12; diff --git a/cpu/bf533/traps.c b/cpu/bf533/traps.c new file mode 100644 index 0000000..37470d5 --- /dev/null +++ b/cpu/bf533/traps.c @@ -0,0 +1,73 @@ +/* + * U-boot - traps.c Routines related to interrupts and exceptions + * + * Copyright (c) 2005 blackfin.uclinux.org + * + * This file is based on + * No original Copyright holder listed, + * Probabily original (C) Roman Zippel (assigned DJD, 1999) + * + * Copyright 2003 Metrowerks - for Blackfin + * Copyright 2000-2001 Lineo, Inc. D. Jeff Dionne <jeff@lineo.ca> + * Copyright 1999-2000 D. Jeff Dionne, <jeff@uclinux.org> + * + * (C) Copyright 2000-2004 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <linux/types.h> +#include <asm/errno.h> +#include <asm/irq.h> +#include <asm/system.h> +#include <asm/traps.h> +#include <asm/page.h> +#include <asm/machdep.h> +#include "cpu.h" + +void init_IRQ(void) +{ + blackfin_init_IRQ(); + return; +} + +void process_int(unsigned long vec, struct pt_regs *fp) +{ + return; +} + +void dump(struct pt_regs *fp) +{ + printf("PC: %08lx\n", fp->pc); + printf("SEQSTAT: %08lx SP: %08lx\n", (long) fp->seqstat, + (long) fp); + printf("R0: %08lx R1: %08lx R2: %08lx R3: %08lx\n", + fp->r0, fp->r1, fp->r2, fp->r3); + printf("R4: %08lx R5: %08lx R6: %08lx R7: %08lx\n", + fp->r4, fp->r5, fp->r6, fp->r7); + printf("P0: %08lx P1: %08lx P2: %08lx P3: %08lx\n", + fp->p0, fp->p1, fp->p2, fp->p3); + printf("P4: %08lx P5: %08lx FP: %08lx\n", fp->p4, fp->p5, + fp->fp); + printf("A0.w: %08lx A0.x: %08lx A1.w: %08lx A1.x: %08lx\n", + fp->a0w, fp->a0x, fp->a1w, fp->a1x); + printf("\n"); +} |