arm: move C runtime setup code in crt0.S

[u-boot] / arch / arm / cpu / arm926ejs / start.S

diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index 6f05f1ac49c0e2c1d19a1eafb4bfdc418b214c35..3cdecd9cdd9e3f28b734e3e83fa0a490d2cca1dd 100644 (file)
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -198,23 +198,11 @@ reset:
        bl      cpu_init_crit
 #endif
 
-/* Set stackpointer in internal RAM to call board_init_f */
-call_board_init_f:
-#ifdef CONFIG_NAND_SPL /* deprecated, use instead CONFIG_SPL_BUILD */
-       ldr     sp, =(CONFIG_SYS_INIT_SP_ADDR)
-#else
-#ifdef CONFIG_SPL_BUILD
-       ldr     sp, =(CONFIG_SPL_STACK)
-#else
-       ldr     sp, =(CONFIG_SYS_INIT_SP_ADDR)
-#endif
-#endif
-       bic     sp, sp, #7 /* 8-byte alignment for ABI compliance */
-       ldr     r0,=0x00000000
-       bl      board_init_f
+       bl      _main
 
 /*------------------------------------------------------------------------------*/
 
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_NAND_SPL)
 /*
  * void relocate_code (addr_sp, gd, addr_moni)
  *
@@ -228,14 +216,11 @@ 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
        sub     r9, r6, r0              /* r9 <- relocation offset */
        cmp     r0, r6
-       beq     clear_bss               /* skip relocation */
+       moveq   r9, #0                  /* no relocation. offset(r9) = 0 */
+       beq     relocate_done           /* skip relocation */
        mov     r1, r6                  /* r1 <- scratch for copy loop */
        ldr     r3, _bss_start_ofs
        add     r2, r0, r3              /* r2 <- source end address         */
@@ -287,56 +272,9 @@ fixnext:
        blo     fixloop
 #endif
 
-clear_bss:
-#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                            */
+relocate_done:
 
-clbss_l:cmp    r0, r1                  /* clear loop... */
-       bhs     clbss_e                 /* if reached end of bss, exit */
-       str     r2, [r0]
-       add     r0, r0, #4
-       b       clbss_l
-clbss_e:
-
-#ifndef CONFIG_SPL_BUILD
-       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
-
-_nand_boot_ofs:
-       .word nand_boot
-#else
-       ldr     r0, _board_init_r_ofs
-       ldr     r1, _TEXT_BASE
-       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
+       bx      lr
 
 _rel_dyn_start_ofs:
        .word __rel_dyn_start - _start
@@ -345,6 +283,13 @@ _rel_dyn_end_ofs:
 _dynsym_start_ofs:
        .word __dynsym_start - _start
 
+#endif
+
+       .globl  c_runtime_cpu_setup
+c_runtime_cpu_setup:
+
+       bx      lr
+
 /*
  *************************************************************************
  *