diff options
Diffstat (limited to 'arch/arm/cpu/arm1176/start.S')
| -rw-r--r-- | arch/arm/cpu/arm1176/start.S | 131 |
1 files changed, 23 insertions, 108 deletions
diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S index 3c291fbe42..f20da8eb7b 100644 --- a/arch/arm/cpu/arm1176/start.S +++ b/arch/arm/cpu/arm1176/start.S @@ -33,11 +33,8 @@ #include <asm-offsets.h> #include <config.h> #include <version.h> -#ifdef CONFIG_ENABLE_MMU -#include <asm/proc/domain.h> -#endif -#if !defined(CONFIG_ENABLE_MMU) && !defined(CONFIG_SYS_PHY_UBOOT_BASE) +#ifndef CONFIG_SYS_PHY_UBOOT_BASE #define CONFIG_SYS_PHY_UBOOT_BASE CONFIG_SYS_UBOOT_BASE #endif @@ -51,7 +48,7 @@ .globl _start _start: b reset -#ifndef CONFIG_NAND_SPL +#ifndef CONFIG_SPL_BUILD ldr pc, _undefined_instruction ldr pc, _software_interrupt ldr pc, _prefetch_abort @@ -98,15 +95,11 @@ _end_vect: .globl _TEXT_BASE _TEXT_BASE: +#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_TEXT_BASE) + .word CONFIG_SPL_TEXT_BASE +#else .word CONFIG_SYS_TEXT_BASE - -/* - * Below variable is very important because we use MMU in U-Boot. - * Without it, we cannot run code correctly before MMU is ON. - * by scsuh. - */ -_TEXT_PHY_BASE: - .word CONFIG_SYS_PHY_UBOOT_BASE +#endif /* * These are defined in the board-specific linker script. @@ -119,6 +112,10 @@ _TEXT_PHY_BASE: _bss_start_ofs: .word __bss_start - _start +.globl _image_copy_end_ofs +_image_copy_end_ofs: + .word __image_copy_end - _start + .globl _bss_end_ofs _bss_end_ofs: .word __bss_end - _start @@ -164,7 +161,7 @@ cpu_init_crit: * When booting from NAND - it has definitely been a reset, so, no need * to flush caches and disable the MMU */ -#ifndef CONFIG_NAND_SPL +#ifndef CONFIG_SPL_BUILD /* * flush v4 I/D caches */ @@ -229,29 +226,24 @@ skip_tcmdisable: /*------------------------------------------------------------------------------*/ /* - * void relocate_code (addr_sp, gd, addr_moni) - * - * This "function" does not return, instead it continues in RAM - * after relocating the monitor code. + * void relocate_code(addr_moni) * + * This function relocates the monitor code. */ .globl relocate_code relocate_code: - mov r4, r0 /* save addr_sp */ - mov r5, r1 /* save addr of gd */ - mov r6, r2 /* save addr of destination */ + mov r6, r0 /* save addr of destination */ adr r0, _start - cmp r0, r6 - moveq r9, #0 /* no relocation. relocation offset(r9) = 0 */ + subs r9, r6, r0 /* r9 <- relocation offset */ beq relocate_done /* skip relocation */ mov r1, r6 /* r1 <- scratch for copy_loop */ - ldr r3, _bss_start_ofs + ldr r3, _image_copy_end_ofs add r2, r0, r3 /* r2 <- source end address */ copy_loop: - ldmia r0!, {r9-r10} /* copy from source address [r0] */ - stmia r1!, {r9-r10} /* copy to target address [r1] */ + ldmia r0!, {r10-r11} /* copy from source address [r0] */ + stmia r1!, {r10-r11} /* copy to target address [r1] */ cmp r0, r2 /* until source end address [r2] */ blo copy_loop @@ -260,7 +252,6 @@ copy_loop: * fix .rel.dyn relocations */ ldr r0, _TEXT_BASE /* r0 <- Text base */ - sub r9, r6, r0 /* r9 <- relocation offset */ ldr r10, _dynsym_start_ofs /* r10 <- sym table ofs */ add r10, r10, r0 /* r10 <- sym table in FLASH */ ldr r2, _rel_dyn_start_ofs /* r2 <- rel dyn start ofs */ @@ -296,44 +287,6 @@ fixnext: blo fixloop #endif -#ifdef CONFIG_ENABLE_MMU -enable_mmu: - /* enable domain access */ - ldr r5, =0x0000ffff - mcr p15, 0, r5, c3, c0, 0 /* load domain access register */ - - /* Set the TTB register */ - ldr r0, _mmu_table_base - ldr r1, =CONFIG_SYS_PHY_UBOOT_BASE - ldr r2, =0xfff00000 - bic r0, r0, r2 - orr r1, r0, r1 - mcr p15, 0, r1, c2, c0, 0 - - /* Enable the MMU */ - mrc p15, 0, r0, c1, c0, 0 - orr r0, r0, #1 /* Set CR_M to enable MMU */ - - /* Prepare to enable the MMU */ - adr r1, skip_hw_init - and r1, r1, #0x3fc - ldr r2, _TEXT_BASE - ldr r3, =0xfff00000 - and r2, r2, r3 - orr r2, r2, r1 - b mmu_enable - - .align 5 - /* Run in a single cache-line */ -mmu_enable: - - mcr p15, 0, r0, c1, c0, 0 - nop - nop - mov pc, r2 -skip_hw_init: -#endif - relocate_done: bx lr @@ -345,52 +298,12 @@ _rel_dyn_end_ofs: _dynsym_start_ofs: .word __dynsym_start - _start -#ifdef CONFIG_ENABLE_MMU -_mmu_table_base: - .word mmu_table -#endif - .globl c_runtime_cpu_setup c_runtime_cpu_setup: mov pc, lr -#ifndef CONFIG_NAND_SPL -/* - * we assume that cache operation is done before. (eg. cleanup_before_linux()) - * actually, we don't need to do anything about cache if not use d-cache in - * U-Boot. So, in this function we clean only MMU. by scsuh - * - * void theLastJump(void *kernel, int arch_num, uint boot_params); - */ -#ifdef CONFIG_ENABLE_MMU - .globl theLastJump -theLastJump: - mov r9, r0 - ldr r3, =0xfff00000 - ldr r4, _TEXT_PHY_BASE - adr r5, phy_last_jump - bic r5, r5, r3 - orr r5, r5, r4 - mov pc, r5 -phy_last_jump: - /* - * disable MMU stuff - */ - mrc p15, 0, r0, c1, c0, 0 - bic r0, r0, #0x00002300 /* clear bits 13, 9:8 (--V- --RS) */ - bic r0, r0, #0x00000087 /* clear bits 7, 2:0 (B--- -CAM) */ - orr r0, r0, #0x00000002 /* set bit 2 (A) Align */ - orr r0, r0, #0x00001000 /* set bit 12 (I) I-Cache */ - mcr p15, 0, r0, c1, c0, 0 - - mcr p15, 0, r0, c8, c7, 0 /* flush v4 TLB */ - - mov r0, #0 - mov pc, r9 -#endif - - +#ifndef CONFIG_SPL_BUILD /* ************************************************************************* * @@ -480,9 +393,11 @@ phy_last_jump: /* save caller lr in position 0 of saved stack */ str lr, [r0] /* get the spsr */ - mrs r0, spsr + mrs lr, spsr /* save spsr in position 1 of saved stack */ str lr, [r0, #4] + /* restore lr */ + ldr lr, [r0] /* restore r0 */ ldr r0, [r13] /* pop stack entry */ @@ -533,4 +448,4 @@ fiq: get_bad_stack bad_save_user_regs bl do_fiq -#endif /* CONFIG_NAND_SPL */ +#endif /* CONFIG_SPL_BUILD */ |
