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Viewing changes to arch/arm/cpu/arm926ejs/start.S

  • Committer: Package Import Robot
  • Author(s): Clint Adams
  • Date: 2012-01-02 17:49:39 UTC
  • mfrom: (1.2.7)
  • Revision ID: package-import@ubuntu.com-20120102174939-iddq37p3372x10yp
Tags: 2011.12-1
* New upstream version.
  - Drop build-timestamp_autogenerated.h-without-config.patch (merged).
  - Drop ublimage-NAND-block-size-isn-t-set-at-build-time.patch (merged).
  - Update kerma-sheevaplug-mvsdio.diff
  - Update mipsel-native-endianness.diff
  - Drop dreamplug-v8.patch (merged).

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Lines of Context:
arch/arm/cpu/arm926ejs/start.S
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 */
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.globl _start
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_start:
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        b       reset
 
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#ifdef CONFIG_SYS_DV_NOR_BOOT_CFG
 
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.globl _start
 
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_start:
 
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.globl _NOR_BOOT_CFG
 
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_NOR_BOOT_CFG:
 
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        .word   CONFIG_SYS_DV_NOR_BOOT_CFG
 
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        b       reset
 
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#else
 
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.globl _start
 
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_start:
 
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        b       reset
 
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#endif
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#ifdef CONFIG_SPL_BUILD
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/* No exception handlers in preloader */
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        ldr     pc, _hang
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.globl _TEXT_BASE
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_TEXT_BASE:
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        .word   CONFIG_SYS_TEXT_BASE
 
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#ifdef CONFIG_NAND_SPL /* deprecated, use instead CONFIG_SPL_BUILD */
 
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        .word   CONFIG_SYS_TEXT_BASE
 
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#else
 
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#ifdef CONFIG_SPL_BUILD
 
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        .word   CONFIG_SPL_TEXT_BASE
 
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#else
 
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        .word   CONFIG_SYS_TEXT_BASE
 
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#endif
 
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#endif
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/*
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 * These are defined in the board-specific linker script.
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_end_ofs:
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        .word _end - _start
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#ifdef CONFIG_NAND_U_BOOT
 
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.globl _end
 
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_end:
 
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        .word __bss_end__
 
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#endif
 
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#ifdef CONFIG_USE_IRQ
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/* IRQ stack memory (calculated at run-time) */
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.globl IRQ_STACK_START
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         * we do sys-critical inits only at reboot,
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         * not when booting from ram!
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         */
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#ifndef CONFIG_SKIP_LOWLEVEL_INIT
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        bl      cpu_init_crit
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#endif
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/* Set stackpointer in internal RAM to call board_init_f */
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call_board_init_f:
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        ldr     sp, =(CONFIG_SYS_INIT_SP_ADDR)
 
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#ifdef CONFIG_NAND_SPL /* deprecated, use instead CONFIG_SPL_BUILD */
 
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        ldr     sp, =(CONFIG_SYS_INIT_SP_ADDR)
 
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#else
 
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#ifdef CONFIG_SPL_BUILD
 
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        ldr     sp, =(CONFIG_SPL_STACK)
 
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#else
 
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        ldr     sp, =(CONFIG_SYS_INIT_SP_ADDR)
 
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#endif
 
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#endif
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        bic     sp, sp, #7 /* 8-byte alignment for ABI compliance */
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        ldr     r0,=0x00000000
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        bl      board_init_f
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        mov     sp, r4
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        adr     r0, _start
 
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        sub     r9, r6, r0              /* r9 <- relocation offset */
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        cmp     r0, r6
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        beq     clear_bss               /* skip relocation */
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        mov     r1, r6                  /* r1 <- scratch for copy loop */
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#endif
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clear_bss:
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#ifndef CONFIG_SPL_BUILD
 
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#ifdef CONFIG_SPL_BUILD
 
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        /* No relocation for SPL */
 
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        ldr     r0, =__bss_start
 
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        ldr     r1, =__bss_end__
 
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#else
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        ldr     r0, _bss_start_ofs
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        ldr     r1, _bss_end_ofs
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        mov     r4, r6                  /* reloc addr */
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        add     r0, r0, r4
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        add     r1, r1, r4
 
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#endif
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        mov     r2, #0x00000000         /* clear                            */
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clbss_l:str     r2, [r0]                /* clear loop...                    */
 
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clbss_l:cmp     r0, r1                  /* clear loop... */
 
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        bhs     clbss_e                 /* if reached end of bss, exit */
 
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        str     r2, [r0]
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        add     r0, r0, #4
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        cmp     r0, r1
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        bne     clbss_l
 
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        b       clbss_l
 
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clbss_e:
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#ifndef CONFIG_SPL_BUILD
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        bl coloured_LED_init
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        bl red_led_on
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#endif
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 *
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 *************************************************************************
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 */
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#ifndef CONFIG_SKIP_LOWLEVEL_INIT
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cpu_init_crit:
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        /*
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         * flush v4 I/D caches
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        orr     r0, r0, #0x00001000     /* set bit 12 (I) I-Cache */
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        mcr     p15, 0, r0, c1, c0, 0
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#ifndef CONFIG_SKIP_LOWLEVEL_INIT
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        /*
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         * Go setup Memory and board specific bits prior to relocation.
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         */
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        mov     ip, lr          /* perserve link reg across call */
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        bl      lowlevel_init   /* go setup pll,mux,memory */
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        mov     lr, ip          /* restore link */
 
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#endif /* CONFIG_SKIP_LOWLEVEL_INIT */
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        mov     pc, lr          /* back to my caller */
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#endif /* CONFIG_SKIP_LOWLEVEL_INIT */
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#ifndef CONFIG_SPL_BUILD
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/*