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diff --git a/cpu/mpc83xx/start.S b/cpu/mpc83xx/start.S
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-/*
- * Copyright (C) 1998 Dan Malek <dmalek@jlc.net>
- * Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
- * Copyright (C) 2000, 2001,2002 Wolfgang Denk <wd@denx.de>
- * Copyright Freescale Semiconductor, Inc. 2004, 2006, 2008.
- *
- * 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 MPC83xx PowerPC based Embedded Boards
- */
-
-#include <config.h>
-#include <mpc83xx.h>
-#include <timestamp.h>
-#include <version.h>
-
-#define CONFIG_83XX 1 /* needed for Linux kernel header files*/
-#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 "MPC83XX"
-#endif
-
-/* We don't want the MMU yet.
- */
-#undef MSR_KERNEL
-
-/*
- * Floating Point enable, Machine Check and Recoverable Interr.
- */
-#ifdef DEBUG
-#define MSR_KERNEL (MSR_FP|MSR_RI)
-#else
-#define MSR_KERNEL (MSR_FP|MSR_ME|MSR_RI)
-#endif
-
-#if !defined(CONFIG_NAND_SPL) && !defined(CONFIG_SYS_RAMBOOT)
-#define CONFIG_SYS_FLASHBOOT
-#endif
-
-/*
- * Set up GOT: Global Offset Table
- *
- * Use r12 to access the GOT
- */
- START_GOT
- GOT_ENTRY(_GOT2_TABLE_)
- GOT_ENTRY(__bss_start)
- GOT_ENTRY(_end)
-
-#ifndef CONFIG_NAND_SPL
- GOT_ENTRY(_FIXUP_TABLE_)
- GOT_ENTRY(_start)
- GOT_ENTRY(_start_of_vectors)
- GOT_ENTRY(_end_of_vectors)
- GOT_ENTRY(transfer_to_handler)
-#endif
- END_GOT
-
-/*
- * The Hard Reset Configuration Word (HRCW) table is in the first 64
- * (0x40) bytes of flash. It has 8 bytes, but each byte is repeated 8
- * times so the processor can fetch it out of flash whether the flash
- * is 8, 16, 32, or 64 bits wide (hardware trickery).
- */
- .text
-#define _HRCW_TABLE_ENTRY(w) \
- .fill 8,1,(((w)>>24)&0xff); \
- .fill 8,1,(((w)>>16)&0xff); \
- .fill 8,1,(((w)>> 8)&0xff); \
- .fill 8,1,(((w) )&0xff)
-
- _HRCW_TABLE_ENTRY(CONFIG_SYS_HRCW_LOW)
- _HRCW_TABLE_ENTRY(CONFIG_SYS_HRCW_HIGH)
-
-/*
- * Magic number and version string - put it after the HRCW since it
- * cannot be first in flash like it is in many other processors.
- */
- .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 2
-
- .globl enable_addr_trans
-enable_addr_trans:
- /* enable address translation */
- mfmsr r5
- ori r5, r5, (MSR_IR | MSR_DR)
- mtmsr r5
- isync
- blr
-
- .globl disable_addr_trans
-disable_addr_trans:
- /* disable address translation */
- mflr r4
- mfmsr r3
- andi. r0, r3, (MSR_IR | MSR_DR)
- beqlr
- andc r3, r3, r0
- mtspr SRR0, r4
- mtspr SRR1, r3
- rfi
-
- .globl get_pvr
-get_pvr:
- mfspr r3, PVR
- blr
-
- .globl ppcDWstore
-ppcDWstore:
- lfd 1, 0(r4)
- stfd 1, 0(r3)
- blr
-
- .globl ppcDWload
-ppcDWload:
- lfd 1, 0(r3)
- stfd 1, 0(r4)
- blr
-
-#ifndef CONFIG_DEFAULT_IMMR
-#error CONFIG_DEFAULT_IMMR must be defined
-#endif /* CONFIG_SYS_DEFAULT_IMMR */
-#ifndef CONFIG_SYS_IMMR
-#define CONFIG_SYS_IMMR CONFIG_DEFAULT_IMMR
-#endif /* CONFIG_SYS_IMMR */
-
-/*
- * After configuration, a system reset exception is executed using the
- * vector at offset 0x100 relative to the base set by MSR[IP]. If
- * MSR[IP] is 0, the base address is 0x00000000. If MSR[IP] is 1, the
- * base address is 0xfff00000. In the case of a Power On Reset or Hard
- * Reset, the value of MSR[IP] is determined by the CIP field in the
- * HRCW.
- *
- * Other bits in the HRCW set up the Base Address and Port Size in BR0.
- * This determines the location of the boot ROM (flash or EPROM) in the
- * processor's address space at boot time. As long as the HRCW is set up
- * so that we eventually end up executing the code below when the
- * processor executes the reset exception, the actual values used should
- * not matter.
- *
- * Once we have got here, the address mask in OR0 is cleared so that the
- * bottom 32K of the boot ROM is effectively repeated all throughout the
- * processor's address space, after which we can jump to the absolute
- * address at which the boot ROM was linked at compile time, and proceed
- * to initialise the memory controller without worrying if the rug will
- * be pulled out from under us, so to speak (it will be fine as long as
- * we configure BR0 with the same boot ROM link address).
- */
- . = EXC_OFF_SYS_RESET
-
- .globl _start
-_start: /* time t 0 */
- li r21, BOOTFLAG_COLD /* Normal Power-On: Boot from FLASH*/
- nop
- b boot_cold
-
- . = EXC_OFF_SYS_RESET + 0x10
-
- .globl _start_warm
-_start_warm:
- li r21, BOOTFLAG_WARM /* Software reboot */
- b boot_warm
-
-
-boot_cold: /* time t 3 */
- lis r4, CONFIG_DEFAULT_IMMR@h
- nop
-boot_warm: /* time t 5 */
- mfmsr r5 /* save msr contents */
-
- /* 83xx manuals prescribe a specific sequence for updating IMMRBAR. */
- bl 1f
-1: mflr r7
-
- lis r3, CONFIG_SYS_IMMR@h
- ori r3, r3, CONFIG_SYS_IMMR@l
-
- lwz r6, IMMRBAR(r4)
- isync
-
- stw r3, IMMRBAR(r4)
- lwz r6, 0(r7) /* Arbitrary external load */
- isync
-
- lwz r6, IMMRBAR(r3)
- isync
-
- /* Initialise the E300 processor core */
- /*------------------------------------------*/
-
-#ifdef CONFIG_NAND_SPL
- /* The FCM begins execution after only the first page
- * is loaded. Wait for the rest before branching
- * to another flash page.
- */
-1: lwz r6, 0x50b0(r3)
- andi. r6, r6, 1
- beq 1b
-#endif
-
- bl init_e300_core
-
-#ifdef CONFIG_SYS_FLASHBOOT
-
- /* Inflate flash location so it appears everywhere, calculate */
- /* the absolute address in final location of the FLASH, jump */
- /* there and deflate the flash size back to minimal size */
- /*------------------------------------------------------------*/
- bl map_flash_by_law1
- lis r4, (CONFIG_SYS_MONITOR_BASE)@h
- ori r4, r4, (CONFIG_SYS_MONITOR_BASE)@l
- addi r5, r4, in_flash - _start + EXC_OFF_SYS_RESET
- mtlr r5
- blr
-in_flash:
-#if 1 /* Remapping flash with LAW0. */
- bl remap_flash_by_law0
-#endif
-#endif /* CONFIG_SYS_FLASHBOOT */
-
- /* setup the bats */
- bl setup_bats
- sync
-
- /*
- * Cache must be enabled here for stack-in-cache trick.
- * This means we need to enable the BATS.
- * This means:
- * 1) for the EVB, original gt regs need to be mapped
- * 2) need to have an IBAT for the 0xf region,
- * we are running there!
- * Cache should be turned on after BATs, since by default
- * everything is write-through.
- * The init-mem BAT can be reused after reloc. The old
- * gt-regs BAT can be reused after board_init_f calls
- * board_early_init_f (EVB only).
- */
- /* enable address translation */
- bl enable_addr_trans
- sync
-
- /* enable the data cache */
- bl dcache_enable
- sync
-#ifdef CONFIG_SYS_INIT_RAM_LOCK
- bl lock_ram_in_cache
- sync
-#endif
-
- /* set up the stack pointer in our newly created
- * cache-ram (r1) */
- lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h
- ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@l
-
- li r0, 0 /* Make room for stack frame header and */
- stwu r0, -4(r1) /* clear final stack frame so that */
- stwu r0, -4(r1) /* stack backtraces terminate cleanly */
-
-
- /* let the C-code set up the rest */
- /* */
- /* Be careful to keep code relocatable & stack humble */
- /*------------------------------------------------------*/
-
- GET_GOT /* initialize GOT access */
-
- /* r3: IMMR */
- lis r3, CONFIG_SYS_IMMR@h
- /* run low-level CPU init code (in Flash)*/
- bl cpu_init_f
-
- /* r3: BOOTFLAG */
- mr r3, r21
- /* run 1st part of board init code (in Flash)*/
- bl board_init_f
-
-#ifndef CONFIG_NAND_SPL
-/*
- * Vector Table
- */
-
- .globl _start_of_vectors
-_start_of_vectors:
-
-/* Machine check */
- STD_EXCEPTION(0x200, MachineCheck, MachineCheckException)
-
-/* Data Storage exception. */
- STD_EXCEPTION(0x300, DataStorage, UnknownException)
-
-/* Instruction Storage exception. */
- STD_EXCEPTION(0x400, InstStorage, UnknownException)
-
-/* External Interrupt exception. */
-#ifndef FIXME
- STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
-#endif
-
-/* Alignment exception. */
- . = 0x600
-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 */
- . = 0x700
-ProgramCheck:
- EXCEPTION_PROLOG(SRR0, SRR1)
- addi r3,r1,STACK_FRAME_OVERHEAD
- EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
- MSR_KERNEL, COPY_EE)
-
- STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
-
- /* I guess we could implement decrementer, and may have
- * to someday for timekeeping.
- */
- STD_EXCEPTION(0x900, Decrementer, timer_interrupt)
-
- STD_EXCEPTION(0xa00, Trap_0a, UnknownException)
- STD_EXCEPTION(0xb00, Trap_0b, UnknownException)
- STD_EXCEPTION(0xc00, SystemCall, UnknownException)
- STD_EXCEPTION(0xd00, SingleStep, UnknownException)
-
- STD_EXCEPTION(0xe00, Trap_0e, UnknownException)
- STD_EXCEPTION(0xf00, Trap_0f, UnknownException)
-
- STD_EXCEPTION(0x1000, InstructionTLBMiss, UnknownException)
- STD_EXCEPTION(0x1100, DataLoadTLBMiss, UnknownException)
- STD_EXCEPTION(0x1200, DataStoreTLBMiss, UnknownException)
-#ifdef DEBUG
- . = 0x1300
- /*
- * This exception occurs when the program counter matches the
- * Instruction Address Breakpoint Register (IABR).
- *
- * I want the cpu to halt if this occurs so I can hunt around
- * with the debugger and look at things.
- *
- * When DEBUG is defined, both machine check enable (in the MSR)
- * and checkstop reset enable (in the reset mode register) are
- * turned off and so a checkstop condition will result in the cpu
- * halting.
- *
- * I force the cpu into a checkstop condition by putting an illegal
- * instruction here (at least this is the theory).
- *
- * well - that didnt work, so just do an infinite loop!
- */
-1: b 1b
-#else
- STD_EXCEPTION(0x1300, InstructionBreakpoint, DebugException)
-#endif
- STD_EXCEPTION(0x1400, SMI, UnknownException)
-
- STD_EXCEPTION(0x1500, Trap_15, UnknownException)
- STD_EXCEPTION(0x1600, Trap_16, UnknownException)
- STD_EXCEPTION(0x1700, Trap_17, UnknownException)
- STD_EXCEPTION(0x1800, Trap_18, UnknownException)
- STD_EXCEPTION(0x1900, Trap_19, UnknownException)
- STD_EXCEPTION(0x1a00, Trap_1a, UnknownException)
- STD_EXCEPTION(0x1b00, Trap_1b, UnknownException)
- STD_EXCEPTION(0x1c00, Trap_1c, UnknownException)
- STD_EXCEPTION(0x1d00, Trap_1d, UnknownException)
- STD_EXCEPTION(0x1e00, Trap_1e, UnknownException)
- STD_EXCEPTION(0x1f00, Trap_1f, UnknownException)
- STD_EXCEPTION(0x2000, Trap_20, UnknownException)
- STD_EXCEPTION(0x2100, Trap_21, UnknownException)
- STD_EXCEPTION(0x2200, Trap_22, UnknownException)
- STD_EXCEPTION(0x2300, Trap_23, UnknownException)
- STD_EXCEPTION(0x2400, Trap_24, UnknownException)
- STD_EXCEPTION(0x2500, Trap_25, UnknownException)
- STD_EXCEPTION(0x2600, Trap_26, UnknownException)
- STD_EXCEPTION(0x2700, Trap_27, UnknownException)
- STD_EXCEPTION(0x2800, Trap_28, UnknownException)
- STD_EXCEPTION(0x2900, Trap_29, UnknownException)
- STD_EXCEPTION(0x2a00, Trap_2a, UnknownException)
- STD_EXCEPTION(0x2b00, Trap_2b, UnknownException)
- STD_EXCEPTION(0x2c00, Trap_2c, UnknownException)
- STD_EXCEPTION(0x2d00, Trap_2d, UnknownException)
- STD_EXCEPTION(0x2e00, Trap_2e, UnknownException)
- STD_EXCEPTION(0x2f00, Trap_2f, UnknownException)
-
-
- .globl _end_of_vectors
-_end_of_vectors:
-
- . = 0x3000
-
-/*
- * 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)
- 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
-#endif /* !CONFIG_NAND_SPL */
-
-/*
- * This code initialises the E300 processor core
- * (conforms to PowerPC 603e spec)
- * Note: expects original MSR contents to be in r5.
- */
- .globl init_e300_core
-init_e300_core: /* time t 10 */
- /* Initialize machine status; enable machine check interrupt */
- /*-----------------------------------------------------------*/
-
- li r3, MSR_KERNEL /* Set ME and RI flags */
- rlwimi r3, r5, 0, 25, 25 /* preserve IP bit set by HRCW */
-#ifdef DEBUG
- rlwimi r3, r5, 0, 21, 22 /* debugger might set SE & BE bits */
-#endif
- SYNC /* Some chip revs need this... */
- mtmsr r3
- SYNC
- mtspr SRR1, r3 /* Make SRR1 match MSR */
-
-
- lis r3, CONFIG_SYS_IMMR@h
-#if defined(CONFIG_WATCHDOG)
- /* Initialise the Wathcdog values and reset it (if req) */
- /*------------------------------------------------------*/
- lis r4, CONFIG_SYS_WATCHDOG_VALUE
- ori r4, r4, (SWCRR_SWEN | SWCRR_SWRI | SWCRR_SWPR)
- stw r4, SWCRR(r3)
-
- /* and reset it */
-
- li r4, 0x556C
- sth r4, SWSRR@l(r3)
- li r4, -0x55C7
- sth r4, SWSRR@l(r3)
-#else
- /* Disable Wathcdog */
- /*-------------------*/
- lwz r4, SWCRR(r3)
- /* Check to see if its enabled for disabling
- once disabled by SW you can't re-enable */
- andi. r4, r4, 0x4
- beq 1f
- xor r4, r4, r4
- stw r4, SWCRR(r3)
-1:
-#endif /* CONFIG_WATCHDOG */
-
-#if defined(CONFIG_MASK_AER_AO)
- /* Write the Arbiter Event Enable to mask Address Only traps. */
- /* This prevents the dcbz instruction from being trapped when */
- /* HID0_ABE Address Broadcast Enable is set and the MEMORY */
- /* COHERENCY bit is set in the WIMG bits, which is often */
- /* needed for PCI operation. */
- lwz r4, 0x0808(r3)
- rlwinm r0, r4, 0, ~AER_AO
- stw r0, 0x0808(r3)
-#endif /* CONFIG_MASK_AER_AO */
-
- /* Initialize the Hardware Implementation-dependent Registers */
- /* HID0 also contains cache control */
- /* - force invalidation of data and instruction caches */
- /*------------------------------------------------------*/
-
- lis r3, CONFIG_SYS_HID0_INIT@h
- ori r3, r3, (CONFIG_SYS_HID0_INIT | HID0_ICFI | HID0_DCFI)@l
- SYNC
- mtspr HID0, r3
-
- lis r3, CONFIG_SYS_HID0_FINAL@h
- ori r3, r3, (CONFIG_SYS_HID0_FINAL & ~(HID0_ICFI | HID0_DCFI))@l
- SYNC
- mtspr HID0, r3
-
- lis r3, CONFIG_SYS_HID2@h
- ori r3, r3, CONFIG_SYS_HID2@l
- SYNC
- mtspr HID2, r3
-
- /* Done! */
- /*------------------------------*/
- blr
-
- /* setup_bats - set them up to some initial state */
- .globl setup_bats
-setup_bats:
- addis r0, r0, 0x0000
-
- /* IBAT 0 */
- addis r4, r0, CONFIG_SYS_IBAT0L@h
- ori r4, r4, CONFIG_SYS_IBAT0L@l
- addis r3, r0, CONFIG_SYS_IBAT0U@h
- ori r3, r3, CONFIG_SYS_IBAT0U@l
- mtspr IBAT0L, r4
- mtspr IBAT0U, r3
-
- /* DBAT 0 */
- addis r4, r0, CONFIG_SYS_DBAT0L@h
- ori r4, r4, CONFIG_SYS_DBAT0L@l
- addis r3, r0, CONFIG_SYS_DBAT0U@h
- ori r3, r3, CONFIG_SYS_DBAT0U@l
- mtspr DBAT0L, r4
- mtspr DBAT0U, r3
-
- /* IBAT 1 */
- addis r4, r0, CONFIG_SYS_IBAT1L@h
- ori r4, r4, CONFIG_SYS_IBAT1L@l
- addis r3, r0, CONFIG_SYS_IBAT1U@h
- ori r3, r3, CONFIG_SYS_IBAT1U@l
- mtspr IBAT1L, r4
- mtspr IBAT1U, r3
-
- /* DBAT 1 */
- addis r4, r0, CONFIG_SYS_DBAT1L@h
- ori r4, r4, CONFIG_SYS_DBAT1L@l
- addis r3, r0, CONFIG_SYS_DBAT1U@h
- ori r3, r3, CONFIG_SYS_DBAT1U@l
- mtspr DBAT1L, r4
- mtspr DBAT1U, r3
-
- /* IBAT 2 */
- addis r4, r0, CONFIG_SYS_IBAT2L@h
- ori r4, r4, CONFIG_SYS_IBAT2L@l
- addis r3, r0, CONFIG_SYS_IBAT2U@h
- ori r3, r3, CONFIG_SYS_IBAT2U@l
- mtspr IBAT2L, r4
- mtspr IBAT2U, r3
-
- /* DBAT 2 */
- addis r4, r0, CONFIG_SYS_DBAT2L@h
- ori r4, r4, CONFIG_SYS_DBAT2L@l
- addis r3, r0, CONFIG_SYS_DBAT2U@h
- ori r3, r3, CONFIG_SYS_DBAT2U@l
- mtspr DBAT2L, r4
- mtspr DBAT2U, r3
-
- /* IBAT 3 */
- addis r4, r0, CONFIG_SYS_IBAT3L@h
- ori r4, r4, CONFIG_SYS_IBAT3L@l
- addis r3, r0, CONFIG_SYS_IBAT3U@h
- ori r3, r3, CONFIG_SYS_IBAT3U@l
- mtspr IBAT3L, r4
- mtspr IBAT3U, r3
-
- /* DBAT 3 */
- addis r4, r0, CONFIG_SYS_DBAT3L@h
- ori r4, r4, CONFIG_SYS_DBAT3L@l
- addis r3, r0, CONFIG_SYS_DBAT3U@h
- ori r3, r3, CONFIG_SYS_DBAT3U@l
- mtspr DBAT3L, r4
- mtspr DBAT3U, r3
-
-#ifdef CONFIG_HIGH_BATS
- /* IBAT 4 */
- addis r4, r0, CONFIG_SYS_IBAT4L@h
- ori r4, r4, CONFIG_SYS_IBAT4L@l
- addis r3, r0, CONFIG_SYS_IBAT4U@h
- ori r3, r3, CONFIG_SYS_IBAT4U@l
- mtspr IBAT4L, r4
- mtspr IBAT4U, r3
-
- /* DBAT 4 */
- addis r4, r0, CONFIG_SYS_DBAT4L@h
- ori r4, r4, CONFIG_SYS_DBAT4L@l
- addis r3, r0, CONFIG_SYS_DBAT4U@h
- ori r3, r3, CONFIG_SYS_DBAT4U@l
- mtspr DBAT4L, r4
- mtspr DBAT4U, r3
-
- /* IBAT 5 */
- addis r4, r0, CONFIG_SYS_IBAT5L@h
- ori r4, r4, CONFIG_SYS_IBAT5L@l
- addis r3, r0, CONFIG_SYS_IBAT5U@h
- ori r3, r3, CONFIG_SYS_IBAT5U@l
- mtspr IBAT5L, r4
- mtspr IBAT5U, r3
-
- /* DBAT 5 */
- addis r4, r0, CONFIG_SYS_DBAT5L@h
- ori r4, r4, CONFIG_SYS_DBAT5L@l
- addis r3, r0, CONFIG_SYS_DBAT5U@h
- ori r3, r3, CONFIG_SYS_DBAT5U@l
- mtspr DBAT5L, r4
- mtspr DBAT5U, r3
-
- /* IBAT 6 */
- addis r4, r0, CONFIG_SYS_IBAT6L@h
- ori r4, r4, CONFIG_SYS_IBAT6L@l
- addis r3, r0, CONFIG_SYS_IBAT6U@h
- ori r3, r3, CONFIG_SYS_IBAT6U@l
- mtspr IBAT6L, r4
- mtspr IBAT6U, r3
-
- /* DBAT 6 */
- addis r4, r0, CONFIG_SYS_DBAT6L@h
- ori r4, r4, CONFIG_SYS_DBAT6L@l
- addis r3, r0, CONFIG_SYS_DBAT6U@h
- ori r3, r3, CONFIG_SYS_DBAT6U@l
- mtspr DBAT6L, r4
- mtspr DBAT6U, r3
-
- /* IBAT 7 */
- addis r4, r0, CONFIG_SYS_IBAT7L@h
- ori r4, r4, CONFIG_SYS_IBAT7L@l
- addis r3, r0, CONFIG_SYS_IBAT7U@h
- ori r3, r3, CONFIG_SYS_IBAT7U@l
- mtspr IBAT7L, r4
- mtspr IBAT7U, r3
-
- /* DBAT 7 */
- addis r4, r0, CONFIG_SYS_DBAT7L@h
- ori r4, r4, CONFIG_SYS_DBAT7L@l
- addis r3, r0, CONFIG_SYS_DBAT7U@h
- ori r3, r3, CONFIG_SYS_DBAT7U@l
- mtspr DBAT7L, r4
- mtspr DBAT7U, r3
-#endif
-
- isync
-
- /* invalidate all tlb's
- *
- * From the 603e User Manual: "The 603e provides the ability to
- * invalidate a TLB entry. The TLB Invalidate Entry (tlbie)
- * instruction invalidates the TLB entry indexed by the EA, and
- * operates on both the instruction and data TLBs simultaneously
- * invalidating four TLB entries (both sets in each TLB). The
- * index corresponds to bits 15-19 of the EA. To invalidate all
- * entries within both TLBs, 32 tlbie instructions should be
- * issued, incrementing this field by one each time."
- *
- * "Note that the tlbia instruction is not implemented on the
- * 603e."
- *
- * bits 15-19 correspond to addresses 0x00000000 to 0x0001F000
- * incrementing by 0x1000 each time. The code below is sort of
- * based on code in "flush_tlbs" from arch/ppc/kernel/head.S
- *
- */
- lis r3, 0
- lis r5, 2
-
-1:
- tlbie r3
- addi r3, r3, 0x1000
- cmp 0, 0, r3, r5
- blt 1b
-
- blr
-
-/* Cache functions.
- *
- * Note: requires that all cache bits in
- * HID0 are in the low half word.
- */
- .globl icache_enable
-icache_enable:
- mfspr r3, HID0
- ori r3, r3, HID0_ICE
- li r4, HID0_ICFI|HID0_ILOCK
- andc r3, r3, r4
- ori r4, r3, HID0_ICFI
- isync
- mtspr HID0, r4 /* sets enable and invalidate, clears lock */
- isync
- mtspr HID0, r3 /* clears invalidate */
- blr
-
- .globl icache_disable
-icache_disable:
- mfspr r3, HID0
- lis r4, 0
- ori r4, r4, HID0_ICE|HID0_ICFI|HID0_ILOCK
- andc r3, r3, r4
- isync
- mtspr HID0, r3 /* clears invalidate, enable and lock */
- blr
-
- .globl icache_status
-icache_status:
- mfspr r3, HID0
- rlwinm r3, r3, (31 - HID0_ICE_SHIFT + 1), 31, 31
- blr
-
- .globl dcache_enable
-dcache_enable:
- mfspr r3, HID0
- li r5, HID0_DCFI|HID0_DLOCK
- andc r3, r3, r5
- ori r3, r3, HID0_DCE
- sync
- mtspr HID0, r3 /* enable, no invalidate */
- blr
-
- .globl dcache_disable
-dcache_disable:
- mflr r4
- bl flush_dcache /* uses r3 and r5 */
- mfspr r3, HID0
- li r5, HID0_DCE|HID0_DLOCK
- andc r3, r3, r5
- ori r5, r3, HID0_DCFI
- sync
- mtspr HID0, r5 /* sets invalidate, clears enable and lock */
- sync
- mtspr HID0, r3 /* clears invalidate */
- mtlr r4
- blr
-
- .globl dcache_status
-dcache_status:
- mfspr r3, HID0
- rlwinm r3, r3, (31 - HID0_DCE_SHIFT + 1), 31, 31
- blr
-
- .globl flush_dcache
-flush_dcache:
- lis r3, 0
- lis r5, CONFIG_SYS_CACHELINE_SIZE
-1: cmp 0, 1, r3, r5
- bge 2f
- lwz r5, 0(r3)
- lis r5, CONFIG_SYS_CACHELINE_SIZE
- addi r3, r3, 0x4
- b 1b
-2: 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 Global 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(__bss_start)
- 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
- /* then 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)
-
- /* copy */
-1: lwzu r0,4(r8)
- stwu r0,4(r7)
- bdnz 1b
-
- addi r0,r5,3
- srwi. r0,r0,2
- mtctr r0
- la r8,-4(r4)
- la r7,-4(r3)
-
- /* and compare */
-20: lwzu r20,4(r8)
- lwzu r21,4(r7)
- xor. r22, r20, r21
- bne 30f
- bdnz 20b
- b 4f
-
- /* compare failed */
-30: li r3, 0
- blr
-
-2: slwi r0,r0,2 /* re copy in reverse order ... y do we needed it? */
- 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
-
-/*
- * We are done. Do not return, instead branch to second part of board
- * initialization, now running from RAM.
- */
- addi r0, r10, in_ram - _start + EXC_OFF_SYS_RESET
- mtlr r0
- blr
-
-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
-
-#ifndef CONFIG_NAND_SPL
- /*
- * 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:
-#endif
-
-clear_bss:
- /*
- * Now clear BSS segment
- */
- lwz r3,GOT(__bss_start)
-#if defined(CONFIG_HYMOD)
- /*
- * For HYMOD - the environment is the very last item in flash.
- * The real .bss stops just before environment starts, so only
- * clear up to that point.
- *
- * taken from mods for FADS board
- */
- lwz r4,GOT(environment)
-#else
- lwz r4,GOT(_end)
-#endif
-
- 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 /* Global 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)
- 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_MachineCheck - _start + EXC_OFF_SYS_RESET
- li r8, Alignment - _start + EXC_OFF_SYS_RESET
-2:
- bl trap_reloc
- addi r7, r7, 0x100 /* next exception vector */
- cmplw 0, r7, r8
- blt 2b
-
- li r7, .L_Alignment - _start + EXC_OFF_SYS_RESET
- bl trap_reloc
-
- li r7, .L_ProgramCheck - _start + EXC_OFF_SYS_RESET
- bl trap_reloc
-
- li r7, .L_FPUnavailable - _start + EXC_OFF_SYS_RESET
- li r8, SystemCall - _start + EXC_OFF_SYS_RESET
-3:
- bl trap_reloc
- addi r7, r7, 0x100 /* next exception vector */
- cmplw 0, r7, r8
- blt 3b
-
- li r7, .L_SingleStep - _start + EXC_OFF_SYS_RESET
- li r8, _end_of_vectors - _start + EXC_OFF_SYS_RESET
-4:
- bl trap_reloc
- addi r7, r7, 0x100 /* next exception vector */
- cmplw 0, r7, r8
- blt 4b
-
- mfmsr r3 /* now that the vectors have */
- lis r7, MSR_IP@h /* relocated into low memory */
- ori r7, r7, MSR_IP@l /* MSR[IP] can be turned off */
- andc r3, r3, r7 /* (if it was on) */
- SYNC /* Some chip revs need this... */
- mtmsr r3
- SYNC
-
- mtlr r4 /* restore link register */
- blr
-
-#endif /* !CONFIG_NAND_SPL */
-
-#ifdef CONFIG_SYS_INIT_RAM_LOCK
-lock_ram_in_cache:
- /* Allocate Initial RAM in data cache.
- */
- lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h
- ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l
- li r4, ((CONFIG_SYS_INIT_RAM_END & ~31) + \
- (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32
- mtctr r4
-1:
- dcbz r0, r3
- addi r3, r3, 32
- bdnz 1b
-
- /* Lock the data cache */
- mfspr r0, HID0
- ori r0, r0, HID0_DLOCK
- sync
- mtspr HID0, r0
- sync
- blr
-
-#ifndef CONFIG_NAND_SPL
-.globl unlock_ram_in_cache
-unlock_ram_in_cache:
- /* invalidate the INIT_RAM section */
- lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h
- ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l
- li r4, ((CONFIG_SYS_INIT_RAM_END & ~31) + \
- (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32
- mtctr r4
-1: icbi r0, r3
- dcbi r0, r3
- addi r3, r3, 32
- bdnz 1b
- sync /* Wait for all icbi to complete on bus */
- isync
-
- /* Unlock the data cache and invalidate it */
- mfspr r3, HID0
- li r5, HID0_DLOCK|HID0_DCFI
- andc r3, r3, r5 /* no invalidate, unlock */
- ori r5, r3, HID0_DCFI /* invalidate, unlock */
- sync
- mtspr HID0, r5 /* invalidate, unlock */
- sync
- mtspr HID0, r3 /* no invalidate, unlock */
- blr
-#endif /* !CONFIG_NAND_SPL */
-#endif /* CONFIG_SYS_INIT_RAM_LOCK */
-
-#ifdef CONFIG_SYS_FLASHBOOT
-map_flash_by_law1:
- /* When booting from ROM (Flash or EPROM), clear the */
- /* Address Mask in OR0 so ROM appears everywhere */
- /*----------------------------------------------------*/
- lis r3, (CONFIG_SYS_IMMR)@h /* r3 <= CONFIG_SYS_IMMR */
- lwz r4, OR0@l(r3)
- li r5, 0x7fff /* r5 <= 0x00007FFFF */
- and r4, r4, r5
- stw r4, OR0@l(r3) /* OR0 <= OR0 & 0x00007FFFF */
-
- /* As MPC8349E User's Manual presented, when RCW[BMS] is set to 0,
- * system will boot from 0x0000_0100, and the LBLAWBAR0[BASE_ADDR]
- * reset value is 0x00000; when RCW[BMS] is set to 1, system will boot
- * from 0xFFF0_0100, and the LBLAWBAR0[BASE_ADDR] reset value is
- * 0xFF800. From the hard resetting to here, the processor fetched and
- * executed the instructions one by one. There is not absolutely
- * jumping happened. Laterly, the u-boot code has to do an absolutely
- * jumping to tell the CPU instruction fetching component what the
- * u-boot TEXT base address is. Because the TEXT base resides in the
- * boot ROM memory space, to garantee the code can run smoothly after
- * that jumping, we must map in the entire boot ROM by Local Access
- * Window. Sometimes, we desire an non-0x00000 or non-0xFF800 starting
- * address for boot ROM, such as 0xFE000000. In this case, the default
- * LBIU Local Access Widow 0 will not cover this memory space. So, we
- * need another window to map in it.
- */
- lis r4, (CONFIG_SYS_FLASH_BASE)@h
- ori r4, r4, (CONFIG_SYS_FLASH_BASE)@l
- stw r4, LBLAWBAR1(r3) /* LBLAWBAR1 <= CONFIG_SYS_FLASH_BASE */
-
- /* Store 0x80000012 + log2(CONFIG_SYS_FLASH_SIZE) into LBLAWAR1 */
- lis r4, (0x80000012)@h
- ori r4, r4, (0x80000012)@l
- li r5, CONFIG_SYS_FLASH_SIZE
-1: srawi. r5, r5, 1 /* r5 = r5 >> 1 */
- addi r4, r4, 1
- bne 1b
-
- stw r4, LBLAWAR1(r3) /* LBLAWAR1 <= 8MB Flash Size */
- blr
-
- /* Though all the LBIU Local Access Windows and LBC Banks will be
- * initialized in the C code, we'd better configure boot ROM's
- * window 0 and bank 0 correctly at here.
- */
-remap_flash_by_law0:
- /* Initialize the BR0 with the boot ROM starting address. */
- lwz r4, BR0(r3)
- li r5, 0x7FFF
- and r4, r4, r5
- lis r5, (CONFIG_SYS_FLASH_BASE & 0xFFFF8000)@h
- ori r5, r5, (CONFIG_SYS_FLASH_BASE & 0xFFFF8000)@l
- or r5, r5, r4
- stw r5, BR0(r3) /* r5 <= (CONFIG_SYS_FLASH_BASE & 0xFFFF8000) | (BR0 & 0x00007FFF) */
-
- lwz r4, OR0(r3)
- lis r5, ~((CONFIG_SYS_FLASH_SIZE << 4) - 1)
- or r4, r4, r5
- stw r4, OR0(r3)
-
- lis r4, (CONFIG_SYS_FLASH_BASE)@h
- ori r4, r4, (CONFIG_SYS_FLASH_BASE)@l
- stw r4, LBLAWBAR0(r3) /* LBLAWBAR0 <= CONFIG_SYS_FLASH_BASE */
-
- /* Store 0x80000012 + log2(CONFIG_SYS_FLASH_SIZE) into LBLAWAR0 */
- lis r4, (0x80000012)@h
- ori r4, r4, (0x80000012)@l
- li r5, CONFIG_SYS_FLASH_SIZE
-1: srawi. r5, r5, 1 /* r5 = r5 >> 1 */
- addi r4, r4, 1
- bne 1b
- stw r4, LBLAWAR0(r3) /* LBLAWAR0 <= Flash Size */
-
-
- xor r4, r4, r4
- stw r4, LBLAWBAR1(r3)
- stw r4, LBLAWAR1(r3) /* Off LBIU LAW1 */
- blr
-#endif /* CONFIG_SYS_FLASHBOOT */