ARM: Fix start.S when used with SPL in arm1136

[platform/kernel/u-boot.git] / arch / arm / cpu / arm1136 / start.S

diff --git a/arch/arm/cpu/arm1136/start.S b/arch/arm/cpu/arm1136/start.S
index 3c5f3ef..5d3b4c2 100644 (file)
--- a/arch/arm/cpu/arm1136/start.S
+++ b/arch/arm/cpu/arm1136/start.S
@@ -3,8 +3,8 @@
  *
  *  Copyright (c) 2004 Texas Instruments <r-woodruff2@ti.com>
  *
- *  Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
- *  Copyright (c) 2002 Alex Züpke <azu@sysgo.de>
+ *  Copyright (c) 2001 Marius Gröger <mag@sysgo.de>
+ *  Copyright (c) 2002 Alex Züpke <azu@sysgo.de>
  *  Copyright (c) 2002 Gary Jennejohn <garyj@denx.de>
  *  Copyright (c) 2003 Richard Woodruff <r-woodruff2@ti.com>
  *  Copyright (c) 2003 Kshitij <kshitij@ti.com>
@@ -33,7 +33,7 @@
 #include <version.h>
 .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:
 
@@ -100,6 +100,10 @@ _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 __bss_end__ - _start
@@ -190,9 +194,10 @@ stack_setup:
 
        adr     r0, _start
        cmp     r0, r6
+       moveq   r9, #0          /* no relocation. relocation offset(r9) = 0 */
        beq     clear_bss               /* 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:
@@ -201,7 +206,7 @@ copy_loop:
        cmp     r0, r2                  /* until source end address [r2]    */
        blo     copy_loop
 
-#ifndef CONFIG_PRELOADER
+#ifndef CONFIG_SPL_BUILD
        /*
         * fix .rel.dyn relocations
         */
@@ -240,22 +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
        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
@@ -270,7 +289,7 @@ _nand_boot_ofs:
 #else
 jump_2_ram:
        ldr     r0, _board_init_r_ofs
-       ldr     r1, _TEXT_BASE
+       adr     r1, _start
        add     lr, r0, r1
        add     lr, lr, r9
        /* setup parameters for board_init_r */
@@ -283,13 +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
-
 /*
  *************************************************************************
  *
@@ -329,7 +341,7 @@ cpu_init_crit:
        mov     pc, lr          /* back to my caller */
 #endif /* CONFIG_SKIP_LOWLEVEL_INIT */
 
-#ifndef CONFIG_PRELOADER
+#ifndef CONFIG_SPL_BUILD
 /*
  *************************************************************************
  *
@@ -436,17 +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
@@ -512,11 +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 */