arm: move exception handling out of start.S files
Exception handling is basically identical for all ARM targets.
Factorize it out of the various start.S files and into a
single vectors.S file, and adjust linker scripts accordingly.
Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S
index b353d696..0704bdd 100644
--- a/arch/arm/cpu/arm1176/start.S
+++ b/arch/arm/cpu/arm1176/start.S
@@ -25,46 +25,6 @@
/*
*************************************************************************
*
- * Jump vector table as in table 3.1 in [1]
- *
- *************************************************************************
- */
-
-.globl _start
-_start: b reset
-#ifndef CONFIG_SPL_BUILD
- ldr pc, _undefined_instruction
- ldr pc, _software_interrupt
- ldr pc, _prefetch_abort
- ldr pc, _data_abort
- ldr pc, _not_used
- ldr pc, _irq
- ldr pc, _fiq
-
-_undefined_instruction:
- .word undefined_instruction
-_software_interrupt:
- .word software_interrupt
-_prefetch_abort:
- .word prefetch_abort
-_data_abort:
- .word data_abort
-_not_used:
- .word not_used
-_irq:
- .word irq
-_fiq:
- .word fiq
-_pad:
- .word 0x12345678 /* now 16*4=64 */
-#else
- . = _start + 64
-#endif
-
- .balignl 16,0xdeadbeef
-/*
- *************************************************************************
- *
* Startup Code (reset vector)
*
* do important init only if we don't start from memory!
@@ -75,14 +35,7 @@
*************************************************************************
*/
-/* 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:
/*
@@ -180,150 +133,3 @@
c_runtime_cpu_setup:
mov pc, lr
-
-#ifndef CONFIG_SPL_BUILD
-/*
- *************************************************************************
- *
- * Interrupt handling
- *
- *************************************************************************
- */
-@
-@ IRQ stack frame.
-@
-#define S_FRAME_SIZE 72
-
-#define S_OLD_R0 68
-#define S_PSR 64
-#define S_PC 60
-#define S_LR 56
-#define S_SP 52
-
-#define S_IP 48
-#define S_FP 44
-#define S_R10 40
-#define S_R9 36
-#define S_R8 32
-#define S_R7 28
-#define S_R6 24
-#define S_R5 20
-#define S_R4 16
-#define S_R3 12
-#define S_R2 8
-#define S_R1 4
-#define S_R0 0
-
-#define MODE_SVC 0x13
-#define I_BIT 0x80
-
-/*
- * use bad_save_user_regs for abort/prefetch/undef/swi ...
- */
-
- .macro bad_save_user_regs
- /* carve out a frame on current user stack */
- sub sp, sp, #S_FRAME_SIZE
- /* Save user registers (now in svc mode) r0-r12 */
- stmia sp, {r0 - r12}
-
- ldr r2, IRQ_STACK_START_IN
- /* get values for "aborted" pc and cpsr (into parm regs) */
- ldmia r2, {r2 - r3}
- /* grab pointer to old stack */
- add r0, sp, #S_FRAME_SIZE
-
- add r5, sp, #S_SP
- mov r1, lr
- /* save sp_SVC, lr_SVC, pc, cpsr */
- stmia r5, {r0 - r3}
- /* save current stack into r0 (param register) */
- mov r0, sp
- .endm
-
- .macro get_bad_stack
- ldr r13, IRQ_STACK_START_IN @ setup our mode stack
-
- /* save caller lr in position 0 of saved stack */
- str lr, [r13]
- /* get the spsr */
- mrs lr, spsr
- /* save spsr in position 1 of saved stack */
- str lr, [r13, #4]
-
- /* prepare SVC-Mode */
- mov r13, #MODE_SVC
- @ msr spsr_c, r13
- /* switch modes, make sure moves will execute */
- msr spsr, r13
- /* capture return pc */
- mov lr, pc
- /* jump to next instruction & switch modes. */
- movs pc, lr
- .endm
-
- .macro get_bad_stack_swi
- /* space on current stack for scratch reg. */
- sub r13, r13, #4
- /* save R0's value. */
- str r0, [r13]
- ldr r13, IRQ_STACK_START_IN @ setup our mode stack
- /* save caller lr in position 0 of saved stack */
- str lr, [r0]
- /* get the spsr */
- mrs lr, spsr
- /* save spsr in position 1 of saved stack */
- str lr, [r0, #4]
- /* restore lr */
- ldr lr, [r0]
- /* restore r0 */
- ldr r0, [r13]
- /* pop stack entry */
- add r13, r13, #4
- .endm
-
-/*
- * exception handlers
- */
- .align 5
-undefined_instruction:
- get_bad_stack
- bad_save_user_regs
- bl do_undefined_instruction
-
- .align 5
-software_interrupt:
- get_bad_stack_swi
- bad_save_user_regs
- bl do_software_interrupt
-
- .align 5
-prefetch_abort:
- get_bad_stack
- bad_save_user_regs
- bl do_prefetch_abort
-
- .align 5
-data_abort:
- get_bad_stack
- bad_save_user_regs
- bl do_data_abort
-
- .align 5
-not_used:
- get_bad_stack
- bad_save_user_regs
- bl do_not_used
-
- .align 5
-irq:
- get_bad_stack
- bad_save_user_regs
- bl do_irq
-
- .align 5
-fiq:
- get_bad_stack
- bad_save_user_regs
- bl do_fiq
-#endif /* CONFIG_SPL_BUILD */