ARM: cache: implement a default weak flush_cache() function

[karo-tx-uboot.git] / arch / arm / cpu / arm926ejs / mxs / start.S

diff --git a/arch/arm/cpu/arm926ejs/mxs/start.S b/arch/arm/cpu/arm926ejs/mxs/start.S
index 3e454ae1bca419c7d3fd1f8517a687a22e1766dd..48abcd5260c93d29a7b0b6640e81277a1fa0456f 100644 (file)
--- a/arch/arm/cpu/arm926ejs/mxs/start.S
+++ b/arch/arm/cpu/arm926ejs/mxs/start.S
@@ -22,71 +22,6 @@
 #include <asm-offsets.h>
 #include <config.h>
 #include <common.h>
-#include <version.h>
-
-/*
- *************************************************************************
- *
- * Jump vector table as in table 3.1 in [1]
- *
- *************************************************************************
- */
-
-
-.globl _start
-_start:
-       b       reset
-       b       undefined_instruction
-       b       software_interrupt
-       b       prefetch_abort
-       b       data_abort
-       b       not_used
-       b       irq
-       b       fiq
-
-/*
- * Vector table, located at address 0x20.
- * This table allows the code running AFTER SPL, the U-Boot, to install it's
- * interrupt handlers here. The problem is that the U-Boot is loaded into RAM,
- * including it's interrupt vectoring table and the table at 0x0 is still the
- * SPLs. So if interrupt happens in U-Boot, the SPLs interrupt vectoring table
- * is still used.
- */
-_vt_reset:
-       .word   _reset
-_vt_undefined_instruction:
-       .word   _hang
-_vt_software_interrupt:
-       .word   _hang
-_vt_prefetch_abort:
-       .word   _hang
-_vt_data_abort:
-       .word   _hang
-_vt_not_used:
-       .word   _reset
-_vt_irq:
-       .word   _hang
-_vt_fiq:
-       .word   _hang
-
-reset:
-       ldr     pc, _vt_reset
-undefined_instruction:
-       ldr     pc, _vt_undefined_instruction
-software_interrupt:
-       ldr     pc, _vt_software_interrupt
-prefetch_abort:
-       ldr     pc, _vt_prefetch_abort
-data_abort:
-       ldr     pc, _vt_data_abort
-not_used:
-       ldr     pc, _vt_not_used
-irq:
-       ldr     pc, _vt_irq
-fiq:
-       ldr     pc, _vt_fiq
-
-       .balignl 16,0xdeadbeef
 
 /*
  *************************************************************************
@@ -101,54 +36,17 @@ fiq:
  *************************************************************************
  */
 
-.globl _TEXT_BASE
-_TEXT_BASE:
-#ifdef 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.
- * Subtracting _start from them lets the linker put their
- * relative position in the executable instead of leaving
- * them null.
- */
-.globl _bss_start_ofs
-_bss_start_ofs:
-       .word __bss_start - _start
-
-.globl _bss_end_ofs
-_bss_end_ofs:
-       .word __bss_end - _start
-
-.globl _end_ofs
-_end_ofs:
-       .word _end - _start
-
-#ifdef CONFIG_USE_IRQ
-/* IRQ stack memory (calculated at run-time) */
-.globl IRQ_STACK_START
-IRQ_STACK_START:
-       .word   0x0badc0de
-
-/* IRQ stack memory (calculated at run-time) */
-.globl FIQ_STACK_START
-FIQ_STACK_START:
-       .word 0x0badc0de
-#endif
-
-/* IRQ stack memory (calculated at run-time) + 8 bytes */
-.globl IRQ_STACK_START_IN
-IRQ_STACK_START_IN:
-       .word   0x0badc0de
-
-/*
- * the actual reset code
- */
+       .globl  reset
+reset:
+       /*
+        * If the CPU is configured in "Wait JTAG connection mode", the stack
+        * pointer is not configured and is zero. This will cause crash when
+        * trying to push data onto stack right below here. Load the SP and make
+        * it point to the end of OCRAM if the SP is zero.
+        */
+       cmp     sp, #0x00000000
+       ldreq   sp, =CONFIG_SYS_INIT_SP_ADDR
 
-_reset:
        /*
         * Store all registers on old stack pointer, this will allow us later to
         * return to the BootROM and let the BootROM load U-Boot into RAM.
@@ -196,8 +94,3 @@ _reset:
        mov r0, #0
 
        bx      lr
-
-_hang:
-       ldr     sp, _TEXT_BASE                  /* switch to abort stack */
-1:
-       bl      1b                              /* hang and never return */