X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farm1136%2Fstart.S;h=5d3b4c2299ef05659066c2f259205274a5c4710e;hb=b736e4b929197b5141b883f4f3906c4bd38dd4f3;hp=aecc943c8e980be314a38bd0582fa790da87b674;hpb=1ecb758341bac03994ed045821f9c0f7d1686d07;p=platform%2Fkernel%2Fu-boot.git diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S index aecc943..5d3b4c2 100644 --- a/arch/arm/cpu/arm1136/start.S +++ b/arch/arm/cpu/arm1136/start.S @@ -3,8 +3,8 @@ * * Copyright (c) 2004 Texas Instruments * - * Copyright (c) 2001 Marius Gröger - * Copyright (c) 2002 Alex Züpke + * Copyright (c) 2001 Marius Gröger + * Copyright (c) 2002 Alex Züpke * Copyright (c) 2002 Gary Jennejohn * Copyright (c) 2003 Richard Woodruff * Copyright (c) 2003 Kshitij @@ -33,7 +33,7 @@ #include .globl _start _start: b reset -#ifdef CONFIG_PRELOADER +#ifdef CONFIG_SPL_BUILD ldr pc, _hang ldr pc, _hang ldr pc, _hang @@ -68,7 +68,7 @@ _not_used: .word not_used _irq: .word irq _fiq: .word fiq _pad: .word 0x12345678 /* now 16*4=64 */ -#endif /* CONFIG_PRELOADER */ +#endif /* CONFIG_SPL_BUILD */ .global _end_vect _end_vect: @@ -100,25 +100,17 @@ _TEXT_BASE: _bss_start_ofs: .word __bss_start - _start +.global _image_copy_end_ofs +_image_copy_end_ofs: + .word __image_copy_end - _start + .globl _bss_end_ofs _bss_end_ofs: - .word _end - _start - -.globl _datarel_start_ofs -_datarel_start_ofs: - .word __datarel_start - _start - -.globl _datarelrolocal_start_ofs -_datarelrolocal_start_ofs: - .word __datarelrolocal_start - _start + .word __bss_end__ - _start -.globl _datarellocal_start_ofs -_datarellocal_start_ofs: - .word __datarellocal_start - _start - -.globl _datarelro_start_ofs -_datarelro_start_ofs: - .word __datarelro_start - _start +.globl _end_ofs +_end_ofs: + .word _end - _start #ifdef CONFIG_USE_IRQ /* IRQ stack memory (calculated at run-time) */ @@ -176,17 +168,10 @@ next: /* Set stackpointer in internal RAM to call board_init_f */ call_board_init_f: ldr sp, =(CONFIG_SYS_INIT_SP_ADDR) + bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ ldr r0,=0x00000000 -#ifdef CONFIG_NAND_SPL - bl nand_boot -#else -#ifdef CONFIG_ONENAND_IPL - bl start_oneboot -#else bl board_init_f -#endif /* CONFIG_ONENAND_IPL */ -#endif /* CONFIG_NAND_SPL */ /*------------------------------------------------------------------------------*/ @@ -202,31 +187,31 @@ relocate_code: mov r4, r0 /* save addr_sp */ mov r5, r1 /* save addr of gd */ mov r6, r2 /* save addr of destination */ - mov r7, r2 /* save addr of destination */ /* Set up the stack */ stack_setup: mov sp, r4 adr r0, _start - ldr r2, _TEXT_BASE - ldr r3, _bss_start_ofs - add r2, r0, r3 /* r2 <- source end address */ cmp r0, r6 - beq clear_bss + moveq r9, #0 /* no relocation. relocation offset(r9) = 0 */ + beq clear_bss /* skip relocation */ + mov r1, r6 /* r1 <- scratch for copy_loop */ + 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 r6!, {r9-r10} /* copy to target address [r1] */ + stmia r1!, {r9-r10} /* copy to target address [r1] */ cmp r0, r2 /* until source end address [r2] */ blo copy_loop -#ifndef CONFIG_PRELOADER +#ifndef CONFIG_SPL_BUILD /* * fix .rel.dyn relocations */ ldr r0, _TEXT_BASE /* r0 <- Text base */ - sub r9, r7, r0 /* r9 <- relocation offset */ + 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 */ @@ -237,10 +222,10 @@ fixloop: ldr r0, [r2] /* r0 <- location to fix up, IN FLASH! */ add r0, r0, r9 /* r0 <- location to fix up in RAM */ ldr r1, [r2, #4] - and r8, r1, #0xff - cmp r8, #23 /* relative fixup? */ + and r7, r1, #0xff + cmp r7, #23 /* relative fixup? */ beq fixrel - cmp r8, #2 /* absolute fixup? */ + cmp r7, #2 /* absolute fixup? */ beq fixabs /* ignore unknown type of fixup */ b fixnext @@ -249,7 +234,7 @@ fixabs: mov r1, r1, LSR #4 /* r1 <- symbol index in .dynsym */ add r1, r10, r1 /* r1 <- address of symbol in table */ ldr r1, [r1, #4] /* r1 <- symbol value */ - add r1, r9 /* r1 <- relocated sym addr */ + add r1, r1, r9 /* r1 <- relocated sym addr */ b fixnext fixrel: /* relative fix: increase location by offset */ @@ -260,23 +245,36 @@ fixnext: add r2, r2, #8 /* each rel.dyn entry is 8 bytes */ cmp r2, r3 blo fixloop + b clear_bss + +_rel_dyn_start_ofs: + .word __rel_dyn_start - _start +_rel_dyn_end_ofs: + .word __rel_dyn_end - _start +_dynsym_start_ofs: + .word __dynsym_start - _start #endif clear_bss: -#ifndef CONFIG_PRELOADER +#ifdef CONFIG_SPL_BUILD + /* No relocation for SPL */ + ldr r0, =__bss_start + ldr r1, =__bss_end__ +#else ldr r0, _bss_start_ofs ldr r1, _bss_end_ofs - ldr r3, _TEXT_BASE /* Text base */ - mov r4, r7 /* reloc addr */ + mov r4, r6 /* reloc addr */ add r0, r0, r4 add r1, r1, r4 +#endif mov r2, #0x00000000 /* clear */ -clbss_l:str r2, [r0] /* clear loop... */ +clbss_l:cmp r0, r1 /* clear loop... */ + bhs clbss_e /* if reached end of bss, exit */ + str r2, [r0] add r0, r0, #4 - cmp r0, r1 - bne clbss_l -#endif /* #ifndef CONFIG_PRELOADER */ + b clbss_l +clbss_e: /* * We are done. Do not return, instead branch to second part of board @@ -284,10 +282,10 @@ clbss_l:str r2, [r0] /* clear loop... */ */ #ifdef CONFIG_NAND_SPL ldr r0, _nand_boot_ofs - adr r1, _start - add pc, r0, r1 -_nand_boot_ofs - : .word nand_boot - _start + mov pc, r0 + +_nand_boot_ofs: + .word nand_boot #else jump_2_ram: ldr r0, _board_init_r_ofs @@ -296,7 +294,7 @@ jump_2_ram: add lr, lr, r9 /* setup parameters for board_init_r */ mov r0, r5 /* gd_t */ - mov r1, r7 /* dest_addr */ + mov r1, r6 /* dest_addr */ /* jump to it ... */ mov pc, lr @@ -304,13 +302,6 @@ _board_init_r_ofs: .word board_init_r - _start #endif -_rel_dyn_start_ofs: - .word __rel_dyn_start - _start -_rel_dyn_end_ofs: - .word __rel_dyn_end - _start -_dynsym_start_ofs: - .word __dynsym_start - _start - /* ************************************************************************* * @@ -350,7 +341,7 @@ cpu_init_crit: mov pc, lr /* back to my caller */ #endif /* CONFIG_SKIP_LOWLEVEL_INIT */ -#ifndef CONFIG_PRELOADER +#ifndef CONFIG_SPL_BUILD /* ************************************************************************* * @@ -457,17 +448,17 @@ cpu_init_crit: .macro get_fiq_stack @ setup FIQ stack ldr sp, FIQ_STACK_START .endm -#endif /* CONFIG_PRELOADER */ +#endif /* CONFIG_SPL_BUILD */ /* * exception handlers */ -#ifdef CONFIG_PRELOADER +#ifdef CONFIG_SPL_BUILD .align 5 do_hang: ldr sp, _TEXT_BASE /* use 32 words about stack */ bl hang /* hang and never return */ -#else /* !CONFIG_PRELOADER */ +#else /* !CONFIG_SPL_BUILD */ .align 5 undefined_instruction: get_bad_stack @@ -533,11 +524,11 @@ fiq: .align 5 .global arm1136_cache_flush arm1136_cache_flush: -#if !defined(CONFIG_SYS_NO_ICACHE) +#if !defined(CONFIG_SYS_ICACHE_OFF) mcr p15, 0, r1, c7, c5, 0 @ invalidate I cache #endif -#if !defined(CONFIG_SYS_NO_DCACHE) +#if !defined(CONFIG_SYS_DCACHE_OFF) mcr p15, 0, r1, c7, c14, 0 @ invalidate D cache #endif mov pc, lr @ back to caller -#endif /* CONFIG_PRELOADER */ +#endif /* CONFIG_SPL_BUILD */