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authorPeter Tyser <ptyser@xes-inc.com>2010-04-12 22:28:09 -0500
committerWolfgang Denk <wd@denx.de>2010-04-13 09:13:16 +0200
commit8d1f268204b07e172f3cb5cee0a3974d605b0b98 (patch)
treec3359e920cc886e7060fb099bf933496aca37153 /cpu/mpc85xx/start.S
parent819833af39a91fa1c1e8252862bbda6f5a602f7b (diff)
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ppc: Move cpu/$CPU to arch/ppc/cpu/$CPU
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'cpu/mpc85xx/start.S')
-rw-r--r--cpu/mpc85xx/start.S1195
1 files changed, 0 insertions, 1195 deletions
diff --git a/cpu/mpc85xx/start.S b/cpu/mpc85xx/start.S
deleted file mode 100644
index b3cb56a..0000000
--- a/cpu/mpc85xx/start.S
+++ /dev/null
@@ -1,1195 +0,0 @@
-/*
- * Copyright 2004, 2007-2010 Freescale Semiconductor, Inc.
- * Copyright (C) 2003 Motorola,Inc.
- *
- * 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
- */
-
-/* U-Boot Startup Code for Motorola 85xx PowerPC based Embedded Boards
- *
- * The processor starts at 0xfffffffc and the code is first executed in the
- * last 4K page(0xfffff000-0xffffffff) in flash/rom.
- *
- */
-
-#include <config.h>
-#include <mpc85xx.h>
-#include <timestamp.h>
-#include <version.h>
-
-#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
-
-#include <ppc_asm.tmpl>
-#include <ppc_defs.h>
-
-#include <asm/cache.h>
-#include <asm/mmu.h>
-
-#ifndef CONFIG_IDENT_STRING
-#define CONFIG_IDENT_STRING ""
-#endif
-
-#undef MSR_KERNEL
-#define MSR_KERNEL ( MSR_ME ) /* Machine Check */
-
-/*
- * Set up GOT: Global Offset Table
- *
- * Use r12 to access the GOT
- */
- START_GOT
- GOT_ENTRY(_GOT2_TABLE_)
- GOT_ENTRY(_FIXUP_TABLE_)
-
-#ifndef CONFIG_NAND_SPL
- GOT_ENTRY(_start)
- GOT_ENTRY(_start_of_vectors)
- GOT_ENTRY(_end_of_vectors)
- GOT_ENTRY(transfer_to_handler)
-#endif
-
- GOT_ENTRY(__init_end)
- GOT_ENTRY(_end)
- GOT_ENTRY(__bss_start)
- END_GOT
-
-/*
- * e500 Startup -- after reset only the last 4KB of the effective
- * address space is mapped in the MMU L2 TLB1 Entry0. The .bootpg
- * section is located at THIS LAST page and basically does three
- * things: clear some registers, set up exception tables and
- * add more TLB entries for 'larger spaces'(e.g. the boot rom) to
- * continue the boot procedure.
-
- * Once the boot rom is mapped by TLB entries we can proceed
- * with normal startup.
- *
- */
-
- .section .bootpg,"ax"
- .globl _start_e500
-
-_start_e500:
-
-/* clear registers/arrays not reset by hardware */
-
- /* L1 */
- li r0,2
- mtspr L1CSR0,r0 /* invalidate d-cache */
- mtspr L1CSR1,r0 /* invalidate i-cache */
-
- mfspr r1,DBSR
- mtspr DBSR,r1 /* Clear all valid bits */
-
- /*
- * Enable L1 Caches early
- *
- */
-
-#if defined(CONFIG_E500MC) && defined(CONFIG_SYS_CACHE_STASHING)
- /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
- li r2,(32 + 0)
- mtspr L1CSR2,r2
-#endif
-
- /* Enable/invalidate the I-Cache */
- lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
- ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
- mtspr SPRN_L1CSR1,r2
-1:
- mfspr r3,SPRN_L1CSR1
- and. r1,r3,r2
- bne 1b
-
- lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
- ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
- mtspr SPRN_L1CSR1,r3
- isync
-2:
- mfspr r3,SPRN_L1CSR1
- andi. r1,r3,L1CSR1_ICE@l
- beq 2b
-
- /* Enable/invalidate the D-Cache */
- lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
- ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
- mtspr SPRN_L1CSR0,r2
-1:
- mfspr r3,SPRN_L1CSR0
- and. r1,r3,r2
- bne 1b
-
- lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h
- ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
- mtspr SPRN_L1CSR0,r3
- isync
-2:
- mfspr r3,SPRN_L1CSR0
- andi. r1,r3,L1CSR0_DCE@l
- beq 2b
-
- /* Setup interrupt vectors */
- lis r1,TEXT_BASE@h
- mtspr IVPR,r1
-
- li r1,0x0100
- mtspr IVOR0,r1 /* 0: Critical input */
- li r1,0x0200
- mtspr IVOR1,r1 /* 1: Machine check */
- li r1,0x0300
- mtspr IVOR2,r1 /* 2: Data storage */
- li r1,0x0400
- mtspr IVOR3,r1 /* 3: Instruction storage */
- li r1,0x0500
- mtspr IVOR4,r1 /* 4: External interrupt */
- li r1,0x0600
- mtspr IVOR5,r1 /* 5: Alignment */
- li r1,0x0700
- mtspr IVOR6,r1 /* 6: Program check */
- li r1,0x0800
- mtspr IVOR7,r1 /* 7: floating point unavailable */
- li r1,0x0900
- mtspr IVOR8,r1 /* 8: System call */
- /* 9: Auxiliary processor unavailable(unsupported) */
- li r1,0x0a00
- mtspr IVOR10,r1 /* 10: Decrementer */
- li r1,0x0b00
- mtspr IVOR11,r1 /* 11: Interval timer */
- li r1,0x0c00
- mtspr IVOR12,r1 /* 12: Watchdog timer */
- li r1,0x0d00
- mtspr IVOR13,r1 /* 13: Data TLB error */
- li r1,0x0e00
- mtspr IVOR14,r1 /* 14: Instruction TLB error */
- li r1,0x0f00
- mtspr IVOR15,r1 /* 15: Debug */
-
- /* Clear and set up some registers. */
- li r0,0x0000
- lis r1,0xffff
- mtspr DEC,r0 /* prevent dec exceptions */
- mttbl r0 /* prevent fit & wdt exceptions */
- mttbu r0
- mtspr TSR,r1 /* clear all timer exception status */
- mtspr TCR,r0 /* disable all */
- mtspr ESR,r0 /* clear exception syndrome register */
- mtspr MCSR,r0 /* machine check syndrome register */
- mtxer r0 /* clear integer exception register */
-
-#ifdef CONFIG_SYS_BOOK3E_HV
- mtspr MAS8,r0 /* make sure MAS8 is clear */
-#endif
-
- /* Enable Time Base and Select Time Base Clock */
- lis r0,HID0_EMCP@h /* Enable machine check */
-#if defined(CONFIG_ENABLE_36BIT_PHYS)
- ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */
-#endif
-#ifndef CONFIG_E500MC
- ori r0,r0,HID0_TBEN@l /* Enable Timebase */
-#endif
- mtspr HID0,r0
-
-#ifndef CONFIG_E500MC
- li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
- mfspr r3,PVR
- andi. r3,r3, 0xff
- cmpwi r3,0x50@l /* if we are rev 5.0 or greater set MBDD */
- blt 1f
- /* Set MBDD bit also */
- ori r0, r0, HID1_MBDD@l
-1:
- mtspr HID1,r0
-#endif
-
- /* Enable Branch Prediction */
-#if defined(CONFIG_BTB)
- lis r0,BUCSR_ENABLE@h
- ori r0,r0,BUCSR_ENABLE@l
- mtspr SPRN_BUCSR,r0
-#endif
-
-#if defined(CONFIG_SYS_INIT_DBCR)
- lis r1,0xffff
- ori r1,r1,0xffff
- mtspr DBSR,r1 /* Clear all status bits */
- lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */
- ori r0,r0,CONFIG_SYS_INIT_DBCR@l
- mtspr DBCR0,r0
-#endif
-
-#ifdef CONFIG_MPC8569
-#define CONFIG_SYS_LBC_ADDR (CONFIG_SYS_CCSRBAR_DEFAULT + 0x5000)
-#define CONFIG_SYS_LBCR_ADDR (CONFIG_SYS_LBC_ADDR + 0xd0)
-
- /* MPC8569 Rev.0 silcon needs to set bit 13 of LBCR to allow elBC to
- * use address space which is more than 12bits, and it must be done in
- * the 4K boot page. So we set this bit here.
- */
-
- /* create a temp mapping TLB0[0] for LBCR */
- lis r6,FSL_BOOKE_MAS0(0, 0, 0)@h
- ori r6,r6,FSL_BOOKE_MAS0(0, 0, 0)@l
-
- lis r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@h
- ori r7,r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@l
-
- lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@h
- ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@l
-
- lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0,
- (MAS3_SX|MAS3_SW|MAS3_SR))@h
- ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0,
- (MAS3_SX|MAS3_SW|MAS3_SR))@l
-
- mtspr MAS0,r6
- mtspr MAS1,r7
- mtspr MAS2,r8
- mtspr MAS3,r9
- isync
- msync
- tlbwe
-
- /* Set LBCR register */
- lis r4,CONFIG_SYS_LBCR_ADDR@h
- ori r4,r4,CONFIG_SYS_LBCR_ADDR@l
-
- lis r5,CONFIG_SYS_LBC_LBCR@h
- ori r5,r5,CONFIG_SYS_LBC_LBCR@l
- stw r5,0(r4)
- isync
-
- /* invalidate this temp TLB */
- lis r4,CONFIG_SYS_LBC_ADDR@h
- ori r4,r4,CONFIG_SYS_LBC_ADDR@l
- tlbivax 0,r4
- isync
-
-#endif /* CONFIG_MPC8569 */
-
- lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h
- ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l
-
-#ifndef CONFIG_SYS_RAMBOOT
- /* create a temp mapping in AS=1 to the 4M boot window */
- lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@h
- ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@l
-
- lis r8,FSL_BOOKE_MAS2(TEXT_BASE & 0xffc00000, (MAS2_I|MAS2_G))@h
- ori r8,r8,FSL_BOOKE_MAS2(TEXT_BASE & 0xffc00000, (MAS2_I|MAS2_G))@l
-
- /* The 85xx has the default boot window 0xff800000 - 0xffffffff */
- lis r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
- ori r9,r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
-#else
- /*
- * create a temp mapping in AS=1 to the 1M TEXT_BASE space, the main
- * image has been relocated to TEXT_BASE on the second stage.
- */
- lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@h
- ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@l
-
- lis r8,FSL_BOOKE_MAS2(TEXT_BASE, (MAS2_I|MAS2_G))@h
- ori r8,r8,FSL_BOOKE_MAS2(TEXT_BASE, (MAS2_I|MAS2_G))@l
-
- lis r9,FSL_BOOKE_MAS3(TEXT_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
- ori r9,r9,FSL_BOOKE_MAS3(TEXT_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
-#endif
-
- mtspr MAS0,r6
- mtspr MAS1,r7
- mtspr MAS2,r8
- mtspr MAS3,r9
- isync
- msync
- tlbwe
-
- /* create a temp mapping in AS=1 to the stack */
- lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h
- ori r6,r6,FSL_BOOKE_MAS0(1, 14, 0)@l
-
- lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@h
- ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@l
-
- lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h
- ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l
-
- lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
- ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
-
- mtspr MAS0,r6
- mtspr MAS1,r7
- mtspr MAS2,r8
- mtspr MAS3,r9
- isync
- msync
- tlbwe
-
- lis r6,MSR_IS|MSR_DS@h
- ori r6,r6,MSR_IS|MSR_DS@l
- lis r7,switch_as@h
- ori r7,r7,switch_as@l
-
- mtspr SPRN_SRR0,r7
- mtspr SPRN_SRR1,r6
- rfi
-
-switch_as:
-/* L1 DCache is used for initial RAM */
-
- /* Allocate Initial RAM in data cache.
- */
- lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
- ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
- mfspr r2, L1CFG0
- andi. r2, r2, 0x1ff
- /* cache size * 1024 / (2 * L1 line size) */
- slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT)
- mtctr r2
- li r0,0
-1:
- dcbz r0,r3
- dcbtls 0,r0,r3
- addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
- bdnz 1b
-
- /* Jump out the last 4K page and continue to 'normal' start */
-#ifdef CONFIG_SYS_RAMBOOT
- b _start_cont
-#else
- /* Calculate absolute address in FLASH and jump there */
- /*--------------------------------------------------------------*/
- lis r3,CONFIG_SYS_MONITOR_BASE@h
- ori r3,r3,CONFIG_SYS_MONITOR_BASE@l
- addi r3,r3,_start_cont - _start + _START_OFFSET
- mtlr r3
- blr
-#endif
-
- .text
- .globl _start
-_start:
- .long 0x27051956 /* U-BOOT Magic Number */
- .globl version_string
-version_string:
- .ascii U_BOOT_VERSION
- .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
- .ascii CONFIG_IDENT_STRING, "\0"
-
- .align 4
- .globl _start_cont
-_start_cont:
- /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/
- lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
- ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
-
- li r0,0
- stwu r0,-4(r1)
- stwu r0,-4(r1) /* Terminate call chain */
-
- stwu r1,-8(r1) /* Save back chain and move SP */
- lis r0,RESET_VECTOR@h /* Address of reset vector */
- ori r0,r0,RESET_VECTOR@l
- stwu r1,-8(r1) /* Save back chain and move SP */
- stw r0,+12(r1) /* Save return addr (underflow vect) */
-
- GET_GOT
- bl cpu_init_early_f
-
- /* switch back to AS = 0 */
- lis r3,(MSR_CE|MSR_ME|MSR_DE)@h
- ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l
- mtmsr r3
- isync
-
- bl cpu_init_f
- bl board_init_f
- isync
-
-#ifndef CONFIG_NAND_SPL
- . = EXC_OFF_SYS_RESET
- .globl _start_of_vectors
-_start_of_vectors:
-
-/* Critical input. */
- CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException)
-
-/* Machine check */
- MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
-
-/* Data Storage exception. */
- STD_EXCEPTION(0x0300, DataStorage, UnknownException)
-
-/* Instruction Storage exception. */
- STD_EXCEPTION(0x0400, InstStorage, UnknownException)
-
-/* External Interrupt exception. */
- STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException)
-
-/* Alignment exception. */
- . = 0x0600
-Alignment:
- EXCEPTION_PROLOG(SRR0, SRR1)
- mfspr r4,DAR
- stw r4,_DAR(r21)
- mfspr r5,DSISR
- stw r5,_DSISR(r21)
- addi r3,r1,STACK_FRAME_OVERHEAD
- EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
-
-/* Program check exception */
- . = 0x0700
-ProgramCheck:
- EXCEPTION_PROLOG(SRR0, SRR1)
- addi r3,r1,STACK_FRAME_OVERHEAD
- EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
- MSR_KERNEL, COPY_EE)
-
- /* No FPU on MPC85xx. This exception is not supposed to happen.
- */
- STD_EXCEPTION(0x0800, FPUnavailable, UnknownException)
-
- . = 0x0900
-/*
- * r0 - SYSCALL number
- * r3-... arguments
- */
-SystemCall:
- addis r11,r0,0 /* get functions table addr */
- ori r11,r11,0 /* Note: this code is patched in trap_init */
- addis r12,r0,0 /* get number of functions */
- ori r12,r12,0
-
- cmplw 0,r0,r12
- bge 1f
-
- rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */
- add r11,r11,r0
- lwz r11,0(r11)
-
- li r20,0xd00-4 /* Get stack pointer */
- lwz r12,0(r20)
- subi r12,r12,12 /* Adjust stack pointer */
- li r0,0xc00+_end_back-SystemCall
- cmplw 0,r0,r12 /* Check stack overflow */
- bgt 1f
- stw r12,0(r20)
-
- mflr r0
- stw r0,0(r12)
- mfspr r0,SRR0
- stw r0,4(r12)
- mfspr r0,SRR1
- stw r0,8(r12)
-
- li r12,0xc00+_back-SystemCall
- mtlr r12
- mtspr SRR0,r11
-
-1: SYNC
- rfi
-_back:
-
- mfmsr r11 /* Disable interrupts */
- li r12,0
- ori r12,r12,MSR_EE
- andc r11,r11,r12
- SYNC /* Some chip revs need this... */
- mtmsr r11
- SYNC
-
- li r12,0xd00-4 /* restore regs */
- lwz r12,0(r12)
-
- lwz r11,0(r12)
- mtlr r11
- lwz r11,4(r12)
- mtspr SRR0,r11
- lwz r11,8(r12)
- mtspr SRR1,r11
-
- addi r12,r12,12 /* Adjust stack pointer */
- li r20,0xd00-4
- stw r12,0(r20)
-
- SYNC
- rfi
-_end_back:
-
- STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt)
- STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException)
- STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException)
-
- STD_EXCEPTION(0x0d00, DataTLBError, UnknownException)
- STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException)
-
- CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException )
-
- .globl _end_of_vectors
-_end_of_vectors:
-
-
- . = . + (0x100 - ( . & 0xff )) /* align for debug */
-
-/*
- * This code finishes saving the registers to the exception frame
- * and jumps to the appropriate handler for the exception.
- * Register r21 is pointer into trap frame, r1 has new stack pointer.
- */
- .globl transfer_to_handler
-transfer_to_handler:
- stw r22,_NIP(r21)
- lis r22,MSR_POW@h
- andc r23,r23,r22
- stw r23,_MSR(r21)
- SAVE_GPR(7, r21)
- SAVE_4GPRS(8, r21)
- SAVE_8GPRS(12, r21)
- SAVE_8GPRS(24, r21)
-
- mflr r23
- andi. r24,r23,0x3f00 /* get vector offset */
- stw r24,TRAP(r21)
- li r22,0
- stw r22,RESULT(r21)
- mtspr SPRG2,r22 /* r1 is now kernel sp */
-
- lwz r24,0(r23) /* virtual address of handler */
- lwz r23,4(r23) /* where to go when done */
- mtspr SRR0,r24
- mtspr SRR1,r20
- mtlr r23
- SYNC
- rfi /* jump to handler, enable MMU */
-
-int_return:
- mfmsr r28 /* Disable interrupts */
- li r4,0
- ori r4,r4,MSR_EE
- andc r28,r28,r4
- SYNC /* Some chip revs need this... */
- mtmsr r28
- SYNC
- lwz r2,_CTR(r1)
- lwz r0,_LINK(r1)
- mtctr r2
- mtlr r0
- lwz r2,_XER(r1)
- lwz r0,_CCR(r1)
- mtspr XER,r2
- mtcrf 0xFF,r0
- REST_10GPRS(3, r1)
- REST_10GPRS(13, r1)
- REST_8GPRS(23, r1)
- REST_GPR(31, r1)
- lwz r2,_NIP(r1) /* Restore environment */
- lwz r0,_MSR(r1)
- mtspr SRR0,r2
- mtspr SRR1,r0
- lwz r0,GPR0(r1)
- lwz r2,GPR2(r1)
- lwz r1,GPR1(r1)
- SYNC
- rfi
-
-crit_return:
- mfmsr r28 /* Disable interrupts */
- li r4,0
- ori r4,r4,MSR_EE
- andc r28,r28,r4
- SYNC /* Some chip revs need this... */
- mtmsr r28
- SYNC
- lwz r2,_CTR(r1)
- lwz r0,_LINK(r1)
- mtctr r2
- mtlr r0
- lwz r2,_XER(r1)
- lwz r0,_CCR(r1)
- mtspr XER,r2
- mtcrf 0xFF,r0
- REST_10GPRS(3, r1)
- REST_10GPRS(13, r1)
- REST_8GPRS(23, r1)
- REST_GPR(31, r1)
- lwz r2,_NIP(r1) /* Restore environment */
- lwz r0,_MSR(r1)
- mtspr SPRN_CSRR0,r2
- mtspr SPRN_CSRR1,r0
- lwz r0,GPR0(r1)
- lwz r2,GPR2(r1)
- lwz r1,GPR1(r1)
- SYNC
- rfci
-
-mck_return:
- mfmsr r28 /* Disable interrupts */
- li r4,0
- ori r4,r4,MSR_EE
- andc r28,r28,r4
- SYNC /* Some chip revs need this... */
- mtmsr r28
- SYNC
- lwz r2,_CTR(r1)
- lwz r0,_LINK(r1)
- mtctr r2
- mtlr r0
- lwz r2,_XER(r1)
- lwz r0,_CCR(r1)
- mtspr XER,r2
- mtcrf 0xFF,r0
- REST_10GPRS(3, r1)
- REST_10GPRS(13, r1)
- REST_8GPRS(23, r1)
- REST_GPR(31, r1)
- lwz r2,_NIP(r1) /* Restore environment */
- lwz r0,_MSR(r1)
- mtspr SPRN_MCSRR0,r2
- mtspr SPRN_MCSRR1,r0
- lwz r0,GPR0(r1)
- lwz r2,GPR2(r1)
- lwz r1,GPR1(r1)
- SYNC
- rfmci
-
-/* Cache functions.
-*/
-.globl invalidate_icache
-invalidate_icache:
- mfspr r0,L1CSR1
- ori r0,r0,L1CSR1_ICFI
- msync
- isync
- mtspr L1CSR1,r0
- isync
- blr /* entire I cache */
-
-.globl invalidate_dcache
-invalidate_dcache:
- mfspr r0,L1CSR0
- ori r0,r0,L1CSR0_DCFI
- msync
- isync
- mtspr L1CSR0,r0
- isync
- blr
-
- .globl icache_enable
-icache_enable:
- mflr r8
- bl invalidate_icache
- mtlr r8
- isync
- mfspr r4,L1CSR1
- ori r4,r4,0x0001
- oris r4,r4,0x0001
- mtspr L1CSR1,r4
- isync
- blr
-
- .globl icache_disable
-icache_disable:
- mfspr r0,L1CSR1
- lis r3,0
- ori r3,r3,L1CSR1_ICE
- andc r0,r0,r3
- mtspr L1CSR1,r0
- isync
- blr
-
- .globl icache_status
-icache_status:
- mfspr r3,L1CSR1
- andi. r3,r3,L1CSR1_ICE
- blr
-
- .globl dcache_enable
-dcache_enable:
- mflr r8
- bl invalidate_dcache
- mtlr r8
- isync
- mfspr r0,L1CSR0
- ori r0,r0,0x0001
- oris r0,r0,0x0001
- msync
- isync
- mtspr L1CSR0,r0
- isync
- blr
-
- .globl dcache_disable
-dcache_disable:
- mfspr r3,L1CSR0
- lis r4,0
- ori r4,r4,L1CSR0_DCE
- andc r3,r3,r4
- mtspr L1CSR0,r0
- isync
- blr
-
- .globl dcache_status
-dcache_status:
- mfspr r3,L1CSR0
- andi. r3,r3,L1CSR0_DCE
- blr
-
- .globl get_pir
-get_pir:
- mfspr r3,PIR
- blr
-
- .globl get_pvr
-get_pvr:
- mfspr r3,PVR
- blr
-
- .globl get_svr
-get_svr:
- mfspr r3,SVR
- blr
-
- .globl wr_tcr
-wr_tcr:
- mtspr TCR,r3
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: in8 */
-/* Description: Input 8 bits */
-/*------------------------------------------------------------------------------- */
- .globl in8
-in8:
- lbz r3,0x0000(r3)
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: out8 */
-/* Description: Output 8 bits */
-/*------------------------------------------------------------------------------- */
- .globl out8
-out8:
- stb r4,0x0000(r3)
- sync
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: out16 */
-/* Description: Output 16 bits */
-/*------------------------------------------------------------------------------- */
- .globl out16
-out16:
- sth r4,0x0000(r3)
- sync
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: out16r */
-/* Description: Byte reverse and output 16 bits */
-/*------------------------------------------------------------------------------- */
- .globl out16r
-out16r:
- sthbrx r4,r0,r3
- sync
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: out32 */
-/* Description: Output 32 bits */
-/*------------------------------------------------------------------------------- */
- .globl out32
-out32:
- stw r4,0x0000(r3)
- sync
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: out32r */
-/* Description: Byte reverse and output 32 bits */
-/*------------------------------------------------------------------------------- */
- .globl out32r
-out32r:
- stwbrx r4,r0,r3
- sync
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: in16 */
-/* Description: Input 16 bits */
-/*------------------------------------------------------------------------------- */
- .globl in16
-in16:
- lhz r3,0x0000(r3)
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: in16r */
-/* Description: Input 16 bits and byte reverse */
-/*------------------------------------------------------------------------------- */
- .globl in16r
-in16r:
- lhbrx r3,r0,r3
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: in32 */
-/* Description: Input 32 bits */
-/*------------------------------------------------------------------------------- */
- .globl in32
-in32:
- lwz 3,0x0000(3)
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: in32r */
-/* Description: Input 32 bits and byte reverse */
-/*------------------------------------------------------------------------------- */
- .globl in32r
-in32r:
- lwbrx r3,r0,r3
- blr
-#endif /* !CONFIG_NAND_SPL */
-
-/*------------------------------------------------------------------------------*/
-
-/*
- * void write_tlb(mas0, mas1, mas2, mas3, mas7)
- */
- .globl write_tlb
-write_tlb:
- mtspr MAS0,r3
- mtspr MAS1,r4
- mtspr MAS2,r5
- mtspr MAS3,r6
-#ifdef CONFIG_ENABLE_36BIT_PHYS
- mtspr MAS7,r7
-#endif
- li r3,0
-#ifdef CONFIG_SYS_BOOK3E_HV
- mtspr MAS8,r3
-#endif
- isync
- tlbwe
- msync
- isync
- blr
-
-/*
- * void relocate_code (addr_sp, gd, addr_moni)
- *
- * This "function" does not return, instead it continues in RAM
- * after relocating the monitor code.
- *
- * r3 = dest
- * r4 = src
- * r5 = length in bytes
- * r6 = cachelinesize
- */
- .globl relocate_code
-relocate_code:
- mr r1,r3 /* Set new stack pointer */
- mr r9,r4 /* Save copy of Init Data pointer */
- mr r10,r5 /* Save copy of Destination Address */
-
- GET_GOT
- mr r3,r5 /* Destination Address */
- lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */
- ori r4,r4,CONFIG_SYS_MONITOR_BASE@l
- lwz r5,GOT(__init_end)
- sub r5,r5,r4
- li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
-
- /*
- * Fix GOT pointer:
- *
- * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
- *
- * Offset:
- */
- sub r15,r10,r4
-
- /* First our own GOT */
- add r12,r12,r15
- /* the the one used by the C code */
- add r30,r30,r15
-
- /*
- * Now relocate code
- */
-
- cmplw cr1,r3,r4
- addi r0,r5,3
- srwi. r0,r0,2
- beq cr1,4f /* In place copy is not necessary */
- beq 7f /* Protect against 0 count */
- mtctr r0
- bge cr1,2f
-
- la r8,-4(r4)
- la r7,-4(r3)
-1: lwzu r0,4(r8)
- stwu r0,4(r7)
- bdnz 1b
- b 4f
-
-2: slwi r0,r0,2
- add r8,r4,r0
- add r7,r3,r0
-3: lwzu r0,-4(r8)
- stwu r0,-4(r7)
- bdnz 3b
-
-/*
- * Now flush the cache: note that we must start from a cache aligned
- * address. Otherwise we might miss one cache line.
- */
-4: cmpwi r6,0
- add r5,r3,r5
- beq 7f /* Always flush prefetch queue in any case */
- subi r0,r6,1
- andc r3,r3,r0
- mr r4,r3
-5: dcbst 0,r4
- add r4,r4,r6
- cmplw r4,r5
- blt 5b
- sync /* Wait for all dcbst to complete on bus */
- mr r4,r3
-6: icbi 0,r4
- add r4,r4,r6
- cmplw r4,r5
- blt 6b
-7: sync /* Wait for all icbi to complete on bus */
- isync
-
- /*
- * Re-point the IVPR at RAM
- */
- mtspr IVPR,r10
-
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
-
- addi r0,r10,in_ram - _start + _START_OFFSET
- mtlr r0
- blr /* NEVER RETURNS! */
- .globl in_ram
-in_ram:
-
- /*
- * Relocation Function, r12 point to got2+0x8000
- *
- * Adjust got2 pointers, no need to check for 0, this code
- * already puts a few entries in the table.
- */
- li r0,__got2_entries@sectoff@l
- la r3,GOT(_GOT2_TABLE_)
- lwz r11,GOT(_GOT2_TABLE_)
- mtctr r0
- sub r11,r3,r11
- addi r3,r3,-4
-1: lwzu r0,4(r3)
- cmpwi r0,0
- beq- 2f
- add r0,r0,r11
- stw r0,0(r3)
-2: bdnz 1b
-
- /*
- * Now adjust the fixups and the pointers to the fixups
- * in case we need to move ourselves again.
- */
- li r0,__fixup_entries@sectoff@l
- lwz r3,GOT(_FIXUP_TABLE_)
- cmpwi r0,0
- mtctr r0
- addi r3,r3,-4
- beq 4f
-3: lwzu r4,4(r3)
- lwzux r0,r4,r11
- add r0,r0,r11
- stw r10,0(r3)
- stw r0,0(r4)
- bdnz 3b
-4:
-clear_bss:
- /*
- * Now clear BSS segment
- */
- lwz r3,GOT(__bss_start)
- lwz r4,GOT(_end)
-
- cmplw 0,r3,r4
- beq 6f
-
- li r0,0
-5:
- stw r0,0(r3)
- addi r3,r3,4
- cmplw 0,r3,r4
- bne 5b
-6:
-
- mr r3,r9 /* Init Data pointer */
- mr r4,r10 /* Destination Address */
- bl board_init_r
-
-#ifndef CONFIG_NAND_SPL
- /*
- * Copy exception vector code to low memory
- *
- * r3: dest_addr
- * r7: source address, r8: end address, r9: target address
- */
- .globl trap_init
-trap_init:
- mflr r4 /* save link register */
- GET_GOT
- lwz r7,GOT(_start_of_vectors)
- lwz r8,GOT(_end_of_vectors)
-
- li r9,0x100 /* reset vector always at 0x100 */
-
- cmplw 0,r7,r8
- bgelr /* return if r7>=r8 - just in case */
-1:
- lwz r0,0(r7)
- stw r0,0(r9)
- addi r7,r7,4
- addi r9,r9,4
- cmplw 0,r7,r8
- bne 1b
-
- /*
- * relocate `hdlr' and `int_return' entries
- */
- li r7,.L_CriticalInput - _start + _START_OFFSET
- bl trap_reloc
- li r7,.L_MachineCheck - _start + _START_OFFSET
- bl trap_reloc
- li r7,.L_DataStorage - _start + _START_OFFSET
- bl trap_reloc
- li r7,.L_InstStorage - _start + _START_OFFSET
- bl trap_reloc
- li r7,.L_ExtInterrupt - _start + _START_OFFSET
- bl trap_reloc
- li r7,.L_Alignment - _start + _START_OFFSET
- bl trap_reloc
- li r7,.L_ProgramCheck - _start + _START_OFFSET
- bl trap_reloc
- li r7,.L_FPUnavailable - _start + _START_OFFSET
- bl trap_reloc
- li r7,.L_Decrementer - _start + _START_OFFSET
- bl trap_reloc
- li r7,.L_IntervalTimer - _start + _START_OFFSET
- li r8,_end_of_vectors - _start + _START_OFFSET
-2:
- bl trap_reloc
- addi r7,r7,0x100 /* next exception vector */
- cmplw 0,r7,r8
- blt 2b
-
- lis r7,0x0
- mtspr IVPR,r7
-
- mtlr r4 /* restore link register */
- blr
-
-.globl unlock_ram_in_cache
-unlock_ram_in_cache:
- /* invalidate the INIT_RAM section */
- lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h
- ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l
- mfspr r4,L1CFG0
- andi. r4,r4,0x1ff
- slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT)
- mtctr r4
-1: dcbi r0,r3
- addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
- bdnz 1b
- sync
-
- /* Invalidate the TLB entries for the cache */
- lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
- ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
- tlbivax 0,r3
- addi r3,r3,0x1000
- tlbivax 0,r3
- addi r3,r3,0x1000
- tlbivax 0,r3
- addi r3,r3,0x1000
- tlbivax 0,r3
- isync
- blr
-
-.globl flush_dcache
-flush_dcache:
- mfspr r3,SPRN_L1CFG0
-
- rlwinm r5,r3,9,3 /* Extract cache block size */
- twlgti r5,1 /* Only 32 and 64 byte cache blocks
- * are currently defined.
- */
- li r4,32
- subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) -
- * log2(number of ways)
- */
- slw r5,r4,r5 /* r5 = cache block size */
-
- rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */
- mulli r7,r7,13 /* An 8-way cache will require 13
- * loads per set.
- */
- slw r7,r7,r6
-
- /* save off HID0 and set DCFA */
- mfspr r8,SPRN_HID0
- ori r9,r8,HID0_DCFA@l
- mtspr SPRN_HID0,r9
- isync
-
- lis r4,0
- mtctr r7
-
-1: lwz r3,0(r4) /* Load... */
- add r4,r4,r5
- bdnz 1b
-
- msync
- lis r4,0
- mtctr r7
-
-1: dcbf 0,r4 /* ...and flush. */
- add r4,r4,r5
- bdnz 1b
-
- /* restore HID0 */
- mtspr SPRN_HID0,r8
- isync
-
- blr
-
-.globl setup_ivors
-setup_ivors:
-
-#include "fixed_ivor.S"
- blr
-#endif /* !CONFIG_NAND_SPL */