X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Farm%2Fcpu%2Fixp%2Fstart.S;h=a305ff5e0ae4ea47b1fc9a7ec06125c3cb8ab447;hb=7086e91b0e9930139e703c8f9f857b52baf2bef4;hp=d1ab19bf5da25cb4904c5de6a33786bd760f8b4b;hpb=41bb7531e1382e730b8a6b06d249ea72d936c468;p=u-boot diff --git a/arch/arm/cpu/ixp/start.S b/arch/arm/cpu/ixp/start.S index d1ab19bf5d..a305ff5e0a 100644 --- a/arch/arm/cpu/ixp/start.S +++ b/arch/arm/cpu/ixp/start.S @@ -65,7 +65,8 @@ .endm .globl _start -_start: b reset +_start: + ldr pc, _reset ldr pc, _undefined_instruction ldr pc, _software_interrupt ldr pc, _prefetch_abort @@ -74,6 +75,7 @@ _start: b reset ldr pc, _irq ldr pc, _fiq +_reset: .word reset _undefined_instruction: .word undefined_instruction _software_interrupt: .word software_interrupt _prefetch_abort: .word prefetch_abort @@ -96,7 +98,11 @@ _fiq: .word fiq .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. @@ -108,8 +114,16 @@ _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 __bss_end - _start + +.globl _end_ofs +_end_ofs: .word _end - _start #ifdef CONFIG_USE_IRQ @@ -163,12 +177,6 @@ reset: str r1, [r2] /* make sure flash is visible at 0 */ -#if 0 - ldr r2, =IXP425_EXP_CFG0 - ldr r1, [r2] - orr r1, r1, #0x80000000 - str r1, [r2] -#endif mov r1, #CONFIG_SYS_SDR_CONFIG ldr r2, =IXP425_SDR_CONFIG str r1, [r2] @@ -212,19 +220,6 @@ reset: str r1, [r4] DELAY_FOR 0x4000, r0 - /* copy */ - mov r0, #0 - mov r4, r0 - add r2, r0, #CONFIG_SYS_MONITOR_LEN - mov r1, #0x10000000 - mov r5, r1 - - 30: - ldr r3, [r0], #4 - str r3, [r1], #4 - cmp r0, r2 - bne 30b - /* invalidate I & D caches & BTB */ mcr p15, 0, r0, c7, c7, 0 CPWAIT r0 @@ -237,19 +232,12 @@ reset: mcr p15, 0, r0, c7, c10, 4 CPWAIT r0 - /* move flash to 0x50000000 */ + /* remove flash mirror at 0x00000000 */ ldr r2, =IXP425_EXP_CFG0 ldr r1, [r2] bic r1, r1, #0x80000000 str r1, [r2] - nop - nop - nop - nop - nop - nop - /* invalidate I & Data TLB */ mcr p15, 0, r0, c8, c7, 0 CPWAIT r0 @@ -265,51 +253,39 @@ reset: orr r0,r0,#0x13 msr cpsr,r0 -/* Set stackpointer in internal RAM to call board_init_f */ -call_board_init_f: - ldr sp, =(CONFIG_SYS_INIT_SP_ADDR) - ldr r0,=0x00000000 - bl board_init_f + 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. - * + * 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 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 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 */ @@ -320,10 +296,10 @@ 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 @@ -332,7 +308,7 @@ 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 */ @@ -345,41 +321,9 @@ 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, 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 - - bl coloured_LED_init - bl red_LED_on -#endif +relocate_done: -/* - * We are done. Do not return, instead branch to second part of board - * initialization, now running from RAM. - */ - 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, r7 /* dest_addr */ - /* jump to it ... */ - mov pc, lr - -_board_init_r_ofs: - .word board_init_r - _start + bx lr _rel_dyn_start_ofs: .word __rel_dyn_start - _start @@ -388,6 +332,11 @@ _rel_dyn_end_ofs: _dynsym_start_ofs: .word __dynsym_start - _start + .globl c_runtime_cpu_setup +c_runtime_cpu_setup: + + bx lr + /****************************************************************************/ /* */ /* Interrupt handling */ @@ -572,33 +521,5 @@ reset_cpu: str r1, [r2] b reset_endless - reset_endless: - b reset_endless - -#ifdef CONFIG_USE_IRQ - -.LC0: .word loops_per_jiffy - -/* - * 0 <= r0 <= 2000 - */ -.globl __udelay -__udelay: - mov r2, #0x6800 - orr r2, r2, #0x00db - mul r0, r2, r0 - ldr r2, .LC0 - ldr r2, [r2] @ max = 0x0fffffff - mov r0, r0, lsr #11 @ max = 0x00003fff - mov r2, r2, lsr #11 @ max = 0x0003ffff - mul r0, r2, r0 @ max = 2^32-1 - movs r0, r0, lsr #6 - -delay_loop: - subs r0, r0, #1 - bne delay_loop - mov pc, lr - -#endif /* CONFIG_USE_IRQ */