X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Farm920t%2Fstart.S;h=2864d128c7b49046e7c94b6c5ba6f7566f8154db;hb=412665b46134f93464c09405e02f08ac9c62526d;hp=08f178de10f7a1382adbaa9bb777d930bebdfedb;hpb=3600945b5aebb2d029c97c48a38d8dc960ad6935;p=u-boot diff --git a/arch/arm/cpu/arm920t/start.S b/arch/arm/cpu/arm920t/start.S index 08f178de10..2864d128c7 100644 --- a/arch/arm/cpu/arm920t/start.S +++ b/arch/arm/cpu/arm920t/start.S @@ -1,8 +1,8 @@ /* * armboot - Startup Code for ARM920 CPU-core * - * 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 * * See file CREDITS for list of people who contributed to this @@ -87,6 +87,10 @@ _bss_start_ofs: .globl _bss_end_ofs _bss_end_ofs: + .word __bss_end - _start + +.globl _end_ofs +_end_ofs: .word _end - _start #ifdef CONFIG_USE_IRQ @@ -119,9 +123,6 @@ start_code: orr r0, r0, #0xd3 msr cpsr, r0 - bl coloured_LED_init - bl red_LED_on - #if defined(CONFIG_AT91RM9200DK) || defined(CONFIG_AT91RM9200EK) /* * relocate exception table @@ -141,11 +142,11 @@ copyex: # if defined(CONFIG_S3C2400) # define pWTCON 0x15300000 -# define INTMSK 0x14400008 /* Interupt-Controller base addresses */ +# define INTMSK 0x14400008 /* Interrupt-Controller base addresses */ # define CLKDIVN 0x14800014 /* clock divisor register */ #else # define pWTCON 0x53000000 -# define INTMSK 0x4A000008 /* Interupt-Controller base addresses */ +# define INTMSK 0x4A000008 /* Interrupt-Controller base addresses */ # define INTSUBMSK 0x4A00001C # define CLKDIVN 0x4C000014 /* clock divisor register */ # endif @@ -181,12 +182,7 @@ copyex: 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) - bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ - ldr r0,=0x00000000 - bl board_init_f + bl _main /*------------------------------------------------------------------------------*/ @@ -203,15 +199,11 @@ relocate_code: mov r5, r1 /* save addr of gd */ mov r6, r2 /* save addr of destination */ - /* Set up the stack */ -stack_setup: - mov sp, r4 - adr r0, _start cmp r0, r6 - beq clear_bss /* skip relocation */ + moveq r9, #0 /* no relocation. relocation offset(r9) = 0 */ + beq relocate_done /* skip relocation */ mov r1, r6 /* r1 <- scratch for copy_loop */ - ldr r2, _TEXT_BASE ldr r3, _bss_start_ofs add r2, r0, r3 /* r2 <- source end address */ @@ -221,7 +213,7 @@ copy_loop: cmp r0, r2 /* until source end address [r2] */ blo copy_loop -#ifndef CONFIG_PRELOADER +#ifndef CONFIG_SPL_BUILD /* * fix .rel.dyn relocations */ @@ -262,50 +254,10 @@ fixnext: blo fixloop #endif -clear_bss: -#ifndef CONFIG_PRELOADER - ldr r0, _bss_start_ofs - ldr r1, _bss_end_ofs - ldr r3, _TEXT_BASE /* Text base */ - mov r4, r6 /* 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 - - bl coloured_LED_init - bl red_LED_on -#endif - -/* - * 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 - mov pc, r0 +relocate_done: -_nand_boot_ofs: - .word nand_boot -#else - ldr r0, _board_init_r_ofs - adr r1, _start - add lr, r0, r1 - add lr, lr, r9 - /* setup parameters for board_init_r */ - mov r0, r5 /* gd_t */ - mov r1, r6 /* dest_addr */ - /* jump to it ... */ mov pc, lr -_board_init_r_ofs: - .word board_init_r - _start -#endif - _rel_dyn_start_ofs: .word __rel_dyn_start - _start _rel_dyn_end_ofs: @@ -313,6 +265,11 @@ _rel_dyn_end_ofs: _dynsym_start_ofs: .word __dynsym_start - _start + .globl c_runtime_cpu_setup +c_runtime_cpu_setup: + + mov pc, lr + /* ************************************************************************* *