X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farm1136%2Fstart.S;h=ccea2d5cb4248e9fb1c7f13978d2842984b83e1d;hp=29ed065c011f8d3c972d2ad6ed8733c89de85c27;hb=8dc16cf9dd6196d99969d12741df186a61a2f9a3;hpb=1ed3b710d04e21dd34f61cfd129cbe18bef91598 diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S index 29ed065c01..ccea2d5cb4 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 @@ -28,11 +28,12 @@ * MA 02111-1307 USA */ +#include #include #include .globl _start _start: b reset -#ifdef CONFIG_PRELOADER +#ifdef CONFIG_SPL_BUILD ldr pc, _hang ldr pc, _hang ldr pc, _hang @@ -67,7 +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: @@ -87,7 +88,11 @@ _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 +#endif /* * These are defined in the board-specific linker script. @@ -99,25 +104,17 @@ _TEXT_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 _end - _start - -.globl _datarel_start_ofs -_datarel_start_ofs: - .word __datarel_start - _start + .word __bss_end - _start -.globl _datarelrolocal_start_ofs -_datarelrolocal_start_ofs: - .word __datarelrolocal_start - _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) */ @@ -131,14 +128,11 @@ FIQ_STACK_START: .word 0x0badc0de #endif -#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) /* IRQ stack memory (calculated at run-time) + 8 bytes */ .globl IRQ_STACK_START_IN IRQ_STACK_START_IN: .word 0x0badc0de -#endif -#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) /* * the actual reset code */ @@ -175,61 +169,37 @@ next: bl cpu_init_crit #endif -/* Set stackpointer in internal RAM to call board_init_f */ -call_board_init_f: - ldr sp, =(CONFIG_SYS_INIT_SP_ADDR) - 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 */ + bl _main /*------------------------------------------------------------------------------*/ /* - * 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 r7, r2 /* save addr of destination */ - - /* Set up the stack */ -stack_setup: - mov sp, r4 + mov r6, r0 /* save addr of destination */ adr r0, _start - ldr r2, _TEXT_BASE - ldr r3, _bss_start_ofs + subs r9, r6, r0 /* r9 <- relocation offset */ + beq relocate_done /* skip relocation */ + mov r1, r6 /* r1 <- scratch for copy_loop */ + ldr r3, _image_copy_end_ofs add r2, r0, r3 /* r2 <- source end address */ - cmp r0, r6 - beq clear_bss -#ifndef CONFIG_SKIP_RELOCATE_UBOOT copy_loop: - ldmia r0!, {r9-r10} /* copy from source address [r0] */ - stmia r6!, {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 -#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 */ 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 */ @@ -237,13 +207,13 @@ copy_loop: ldr r3, _rel_dyn_end_ofs /* r3 <- rel dyn end ofs */ add r3, r3, r0 /* r3 <- rel dyn end in FLASH */ fixloop: - ldr r0, [r2] /* r0 <- location to fix up, IN FLASH! */ - add r0, r9 /* r0 <- location to fix up in RAM */ + 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 @@ -252,7 +222,7 @@ 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 */ @@ -260,53 +230,16 @@ fixrel: add r1, r1, r9 fixnext: str r1, [r0] - add r2, r2, #8 /* each rel.dyn entry is 8 bytes */ + add r2, r2, #8 /* each rel.dyn entry is 8 bytes */ cmp r2, r3 - ble fixloop + blo fixloop #endif -#endif /* #ifndef CONFIG_SKIP_RELOCATE_UBOOT */ - -clear_bss: -#ifndef CONFIG_PRELOADER - ldr r0, _bss_start_ofs - ldr r1, _bss_end_ofs - ldr r3, _TEXT_BASE /* Text base */ - mov r4, r7 /* reloc addr */ - add r0, r0, r4 - add r1, r1, r4 - mov r2, #0x00000000 /* clear */ - -clbss_l:str r2, [r0] /* clear loop... */ - add r0, r0, #4 - cmp r0, r1 - bne clbss_l -#endif /* #ifndef CONFIG_PRELOADER */ -/* - * We are done. Do not return, instead branch to second part of board - * initialization, now running from RAM. - */ -#ifdef CONFIG_NAND_SPL - ldr r0, _nand_boot_ofs - adr r1, _start - add pc, r0, r1 -_nand_boot_ofs - : .word nand_boot - _start -#else -jump_2_ram: - ldr r0, _board_init_r_ofs - adr r1, _start - add r0, r0, r1 - add lr, r0, r9 - /* setup parameters for board_init_r */ - mov r0, r5 /* gd_t */ - mov r1, r7 /* dest_addr */ - /* jump to it ... */ - mov pc, lr - -_board_init_r_ofs: - .word board_init_r - _start -#endif +relocate_done: + + bx lr + +#ifndef CONFIG_SPL_BUILD _rel_dyn_start_ofs: .word __rel_dyn_start - _start @@ -315,111 +248,12 @@ _rel_dyn_end_ofs: _dynsym_start_ofs: .word __dynsym_start - _start -#else /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */ -/* - * the actual reset code - */ - -reset: - /* - * set the cpu to SVC32 mode - */ - mrs r0,cpsr - bic r0,r0,#0x1f - orr r0,r0,#0xd3 - msr cpsr,r0 - -#ifdef CONFIG_OMAP2420H4 - /* Copy vectors to mask ROM indirect addr */ - adr r0, _start /* r0 <- current position of code */ - add r0, r0, #4 /* skip reset vector */ - mov r2, #64 /* r2 <- size to copy */ - add r2, r0, r2 /* r2 <- source end address */ - mov r1, #SRAM_OFFSET0 /* build vect addr */ - mov r3, #SRAM_OFFSET1 - add r1, r1, r3 - mov r3, #SRAM_OFFSET2 - add r1, r1, r3 -next: - ldmia r0!, {r3-r10} /* copy from source address [r0] */ - stmia r1!, {r3-r10} /* copy to target address [r1] */ - cmp r0, r2 /* until source end address [r2] */ - bne next /* loop until equal */ - bl cpy_clk_code /* put dpll adjust code behind vectors */ -#endif - /* the mask ROM code should have PLL and others stable */ -#ifndef CONFIG_SKIP_LOWLEVEL_INIT - bl cpu_init_crit -#endif - -#ifndef CONFIG_SKIP_RELOCATE_UBOOT -relocate: /* relocate U-Boot to RAM */ - adr r0, _start /* r0 <- current position of code */ - ldr r1, _TEXT_BASE /* test if we run from flash or RAM */ - cmp r0, r1 /* don't reloc during debug */ -#ifndef CONFIG_PRELOADER - beq stack_setup -#endif /* CONFIG_PRELOADER */ - - ldr r2, _armboot_start - ldr r3, _bss_start - sub r2, r3, r2 /* r2 <- size of armboot */ - add r2, r0, r2 /* r2 <- source end address */ - -copy_loop: - ldmia r0!, {r3-r10} /* copy from source address [r0] */ - stmia r1!, {r3-r10} /* copy to target address [r1] */ - cmp r0, r2 /* until source end address [r2] */ - blo copy_loop -#endif /* CONFIG_SKIP_RELOCATE_UBOOT */ - - /* Set up the stack */ -stack_setup: - ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */ -#ifdef CONFIG_PRELOADER - sub sp, r0, #128 /* leave 32 words for abort-stack */ -#else - sub r0, r0, #CONFIG_SYS_MALLOC_LEN /* malloc area */ - sub r0, r0, #CONFIG_SYS_GBL_DATA_SIZE /* bdinfo */ -#ifdef CONFIG_USE_IRQ - sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ) -#endif - sub sp, r0, #12 /* leave 3 words for abort-stack */ -#endif /* CONFIG_PRELOADER */ - bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ - -clear_bss: - adr r2, _start - ldr r0, _bss_start_ofs /* find start of bss segment */ - add r0, r0, r2 - ldr r1, _bss_end_ofs /* stop here */ - add r1, r1, r2 - mov r2, #0x00000000 /* clear */ - -#ifndef CONFIG_PRELOADER -clbss_l:str r2, [r0] /* clear loop... */ - add r0, r0, #4 - cmp r0, r1 - bne clbss_l #endif - ldr r0, _start_armboot_ofs - adr r1, _start - add r0, r0, r1 - ldr pc, r0 + .globl c_runtime_cpu_setup +c_runtime_cpu_setup: -_start_armboot_ofs: -#ifdef CONFIG_NAND_SPL - .word nand_boot - _start -#else -#ifdef CONFIG_ONENAND_IPL - .word start_oneboot - _start -#else - .word start_armboot - _start -#endif /* CONFIG_ONENAND_IPL */ -#endif /* CONFIG_NAND_SPL */ - -#endif /* #if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) */ + bx lr /* ************************************************************************* @@ -460,7 +294,7 @@ cpu_init_crit: mov pc, lr /* back to my caller */ #endif /* CONFIG_SKIP_LOWLEVEL_INIT */ -#ifndef CONFIG_PRELOADER +#ifndef CONFIG_SPL_BUILD /* ************************************************************************* * @@ -505,13 +339,7 @@ cpu_init_crit: sub sp, sp, #S_FRAME_SIZE @ carve out a frame on current user stack stmia sp, {r0 - r12} @ Save user registers (now in svc mode) r0-r12 -#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) ldr r2, IRQ_STACK_START_IN @ set base 2 words into abort stack -#else - adr r2, _start - sub r2, r2, #(CONFIG_SYS_MALLOC_LEN) - sub r2, r2, #(CONFIG_SYS_GBL_DATA_SIZE+8) @ set base 2 words into abort stack -#endif ldmia r2, {r2 - r3} @ get values for "aborted" pc and cpsr (into parm regs) add r0, sp, #S_FRAME_SIZE @ grab pointer to old stack @@ -542,13 +370,7 @@ cpu_init_crit: .endm .macro get_bad_stack -#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) ldr r13, IRQ_STACK_START_IN @ setup our mode stack (enter in banked mode) -#else - adr r13, _start @ setup our mode stack (enter in banked mode) - sub r13, r13, #(CONFIG_STACKSIZE+CONFIG_SYS_MALLOC_LEN) @ move past malloc pool - sub r13, r13, #(CONFIG_SYS_GBL_DATA_SIZE+8) @ move to reserved a couple spots for abort stack -#endif str lr, [r13] @ save caller lr in position 0 of saved stack mrs lr, spsr @ get the spsr @@ -564,16 +386,11 @@ cpu_init_crit: .macro get_bad_stack_swi sub r13, r13, #4 @ space on current stack for scratch reg. str r0, [r13] @ save R0's value. -#if !defined(CONFIG_SYS_ARM_WITHOUT_RELOC) ldr r0, IRQ_STACK_START_IN @ get data regions start -#else - ldr r0, _armboot_start @ get data regions start - sub r0, r0, #(CONFIG_SYS_MALLOC_LEN) @ move past malloc pool - sub r0, r0, #(CONFIG_SYS_GBL_DATA_SIZE+8) @ move past gbl and a couple spots for abort stack -#endif str lr, [r0] @ save caller lr in position 0 of saved stack - mrs r0, spsr @ get the spsr + mrs lr, spsr @ get the spsr str lr, [r0, #4] @ save spsr in position 1 of saved stack + ldr lr, [r0] @ restore lr ldr r0, [r13] @ restore r0 add r13, r13, #4 @ pop stack entry .endm @@ -585,17 +402,17 @@ 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 @@ -661,11 +478,11 @@ 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 */