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author | Peter Tyser <ptyser@xes-inc.com> | 2010-04-12 22:28:09 -0500 |
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committer | Wolfgang Denk <wd@denx.de> | 2010-04-13 09:13:16 +0200 |
commit | 8d1f268204b07e172f3cb5cee0a3974d605b0b98 (patch) | |
tree | c3359e920cc886e7060fb099bf933496aca37153 /cpu/74xx_7xx/start.S | |
parent | 819833af39a91fa1c1e8252862bbda6f5a602f7b (diff) | |
download | u-boot-imx-8d1f268204b07e172f3cb5cee0a3974d605b0b98.zip u-boot-imx-8d1f268204b07e172f3cb5cee0a3974d605b0b98.tar.gz u-boot-imx-8d1f268204b07e172f3cb5cee0a3974d605b0b98.tar.bz2 |
ppc: Move cpu/$CPU to arch/ppc/cpu/$CPU
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'cpu/74xx_7xx/start.S')
-rw-r--r-- | cpu/74xx_7xx/start.S | 874 |
1 files changed, 0 insertions, 874 deletions
diff --git a/cpu/74xx_7xx/start.S b/cpu/74xx_7xx/start.S deleted file mode 100644 index 88fdf88..0000000 --- a/cpu/74xx_7xx/start.S +++ /dev/null @@ -1,874 +0,0 @@ -/* - * 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 (C) 2001 Josh Huber <huber@mclx.com> - * - * 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 PowerPC based Embedded Boards - * - * - * The processor starts at 0xfff00100 and the code is executed - * from flash. The code is organized to be at an other address - * in memory, but as long we don't jump around before relocating. - * board_init lies at a quite high address and when the cpu has - * jumped there, everything is ok. - */ -#include <config.h> -#include <74xx_7xx.h> -#include <timestamp.h> -#include <version.h> - -#include <ppc_asm.tmpl> -#include <ppc_defs.h> - -#include <asm/cache.h> -#include <asm/mmu.h> - -#if !defined(CONFIG_DB64360) && \ - !defined(CONFIG_DB64460) && \ - !defined(CONFIG_CPCI750) && \ - !defined(CONFIG_P3Mx) -#include <galileo/gt64260R.h> -#endif - -#ifndef CONFIG_IDENT_STRING -#define CONFIG_IDENT_STRING "" -#endif - -/* We don't want the MMU yet. -*/ -#undef MSR_KERNEL -/* Machine Check and Recoverable Interr. */ -#define MSR_KERNEL ( MSR_ME | MSR_RI ) - -/* - * Set up GOT: Global Offset Table - * - * Use r12 to access the GOT - */ - START_GOT - GOT_ENTRY(_GOT2_TABLE_) - GOT_ENTRY(_FIXUP_TABLE_) - - GOT_ENTRY(_start) - GOT_ENTRY(_start_of_vectors) - GOT_ENTRY(_end_of_vectors) - GOT_ENTRY(transfer_to_handler) - - GOT_ENTRY(__init_end) - GOT_ENTRY(_end) - GOT_ENTRY(__bss_start) - END_GOT - -/* - * r3 - 1st arg to board_init(): IMMP pointer - * r4 - 2nd arg to board_init(): boot flag - */ - .text - .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" - - . = EXC_OFF_SYS_RESET - .globl _start -_start: - li r21, BOOTFLAG_COLD /* Normal Power-On: Boot from FLASH */ - b boot_cold - sync - - . = EXC_OFF_SYS_RESET + 0x10 - - .globl _start_warm -_start_warm: - li r21, BOOTFLAG_WARM /* Software reboot */ - b boot_warm - sync - - /* the boot code is located below the exception table */ - - .globl _start_of_vectors -_start_of_vectors: - -/* Machine check */ - STD_EXCEPTION(0x200, MachineCheck, MachineCheckException) - -/* Data Storage exception. "Never" generated on the 860. */ - STD_EXCEPTION(0x300, DataStorage, UnknownException) - -/* Instruction Storage exception. "Never" generated on the 860. */ - STD_EXCEPTION(0x400, InstStorage, UnknownException) - -/* External Interrupt exception. */ - STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt) - -/* 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) - - /* No FPU on MPC8xx. This exception is not supposed to happen. - */ - 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) - - /* - * On the MPC8xx, this is a software emulation interrupt. It - * occurs for all unimplemented and illegal instructions. - */ - STD_EXCEPTION(0x1000, SoftEmu, SoftEmuException) - - STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException) - STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException) - STD_EXCEPTION(0x1300, InstructionTLBError, UnknownException) - STD_EXCEPTION(0x1400, DataTLBError, UnknownException) - - STD_EXCEPTION(0x1500, Reserved5, UnknownException) - STD_EXCEPTION(0x1600, Reserved6, UnknownException) - STD_EXCEPTION(0x1700, Reserved7, UnknownException) - STD_EXCEPTION(0x1800, Reserved8, UnknownException) - STD_EXCEPTION(0x1900, Reserved9, UnknownException) - STD_EXCEPTION(0x1a00, ReservedA, UnknownException) - STD_EXCEPTION(0x1b00, ReservedB, UnknownException) - - STD_EXCEPTION(0x1c00, DataBreakpoint, UnknownException) - STD_EXCEPTION(0x1d00, InstructionBreakpoint, UnknownException) - STD_EXCEPTION(0x1e00, PeripheralBreakpoint, UnknownException) - STD_EXCEPTION(0x1f00, DevPortBreakpoint, UnknownException) - - .globl _end_of_vectors -_end_of_vectors: - - . = 0x2000 - -boot_cold: -boot_warm: - /* disable everything */ - li r0, 0 - mtspr HID0, r0 - sync - mtmsr 0 - bl invalidate_bats - sync - -#ifdef CONFIG_SYS_L2 - /* init the L2 cache */ - addis r3, r0, L2_INIT@h - ori r3, r3, L2_INIT@l - sync - mtspr l2cr, r3 -#endif -#if defined(CONFIG_ALTIVEC) && defined(CONFIG_74xx) - .long 0x7e00066c - /* - * dssall instruction, gas doesn't have it yet - * ...for altivec, data stream stop all this probably - * isn't needed unless we warm (software) reboot U-Boot - */ -#endif - -#ifdef CONFIG_SYS_L2 - /* invalidate the L2 cache */ - bl l2cache_invalidate - sync -#endif -#ifdef CONFIG_SYS_BOARD_ASM_INIT - /* do early init */ - bl board_asm_init -#endif - - /* - * 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, in_flash - _start + EXC_OFF_SYS_RESET - mtlr r3 - blr - -in_flash: - /* let the C-code set up the rest */ - /* */ - /* Be careful to keep code relocatable ! */ - /*------------------------------------------------------*/ - - /* perform low-level init */ - /* sdram init, galileo init, etc */ - /* r3: NHR bit from HID0 */ - - /* 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). - */ -#if !defined(CONFIG_BAB7xx) && !defined(CONFIG_ELPPC) && !defined(CONFIG_P3Mx) - /* enable address translation */ - bl enable_addr_trans - sync - - /* enable and invalidate the data cache */ - bl l1dcache_enable - sync -#endif -#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 */ - - GET_GOT /* initialize GOT access */ - - /* run low-level CPU init code (from Flash) */ - bl cpu_init_f - sync - - mr r3, r21 - - /* r3: BOOTFLAG */ - /* run 1st part of board init code (from Flash) */ - bl board_init_f - sync - - /* NOTREACHED */ - - .globl invalidate_bats -invalidate_bats: - /* invalidate BATs */ - mtspr IBAT0U, r0 - mtspr IBAT1U, r0 - mtspr IBAT2U, r0 - mtspr IBAT3U, r0 -#ifdef CONFIG_HIGH_BATS - mtspr IBAT4U, r0 - mtspr IBAT5U, r0 - mtspr IBAT6U, r0 - mtspr IBAT7U, r0 -#endif - isync - mtspr DBAT0U, r0 - mtspr DBAT1U, r0 - mtspr DBAT2U, r0 - mtspr DBAT3U, r0 -#ifdef CONFIG_HIGH_BATS - mtspr DBAT4U, r0 - mtspr DBAT5U, r0 - mtspr DBAT6U, r0 - mtspr DBAT7U, r0 -#endif - isync - sync - 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 - isync - - /* 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 - isync - - /* 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 - isync - - /* 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 - isync - - /* 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 - isync - - /* 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 - isync - - /* 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 - isync - - /* 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 - isync - -#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 - isync - - /* 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 - isync - - /* 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 - isync - - /* 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 - isync - - /* 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 - isync - - /* 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 - isync - - /* 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 - isync - - /* 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 - isync -#endif - - /* bats are done, now invalidate the TLBs */ - - addis r3, 0, 0x0000 - addis r5, 0, 0x4 /* upper bound of 0x00040000 for 7400/750 */ - - isync - -tlblp: - tlbie r3 - sync - addi r3, r3, 0x1000 - cmp 0, 0, r3, r5 - blt tlblp - - blr - - .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 - -/* - * 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 - - .globl dc_read -dc_read: - blr - - .globl get_pvr -get_pvr: - mfspr r3, PVR - 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(__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 - /* then the one used by the C code */ - add r30, r30, r15 - - /* - * Now relocate code - */ -#ifdef CONFIG_ECC - bl board_relocate_rom - sync - mr r3, r10 /* 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 */ -#else - 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 -#endif -/* - * 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: -#ifdef CONFIG_ECC - bl board_init_ecc -#endif - /* - * 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, r10 /* Destination Address */ -#if defined(CONFIG_AMIGAONEG3SE) || \ - defined(CONFIG_DB64360) || \ - defined(CONFIG_DB64460) || \ - defined(CONFIG_CPCI750) || \ - defined(CONFIG_PPMC7XX) || \ - defined(CONFIG_P3Mx) - mr r4, r9 /* Use RAM copy of the global data */ -#endif - bl after_reloc - - /* not reached - end relocate_code */ -/*-----------------------------------------------------------------------*/ - - /* - * 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 - - /* enable execptions from RAM vectors */ - mfmsr r7 - li r8,MSR_IP - andc r7,r7,r8 - mtmsr r7 - - mtlr r4 /* restore link register */ - blr - -#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, 0x1000 - sync - mtspr HID0, r0 - sync - blr - -.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 - addi r3, r3, 32 - bdnz 1b - sync /* Wait for all icbi to complete on bus */ - isync - - /* Unlock the data cache and invalidate it */ - mfspr r0, HID0 - li r3,0x1000 - andc r0,r0,r3 - li r3,0x0400 - or r0,r0,r3 - sync - mtspr HID0, r0 - sync - blr -#endif |