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authorMichael Schwingen <michael@schwingen.org>2011-05-23 00:00:00 +0200
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2011-06-23 08:24:55 +0200
commitce04bb41a60b87236ff5294a7508ebb5afc014e4 (patch)
tree283dab38709b0618948f5bc975487dcd28cff76b /arch/arm/cpu/ixp/start.S
parent009e464802569bc97c03c52f76fdf7e38040b634 (diff)
downloadblackbird-obmc-uboot-ce04bb41a60b87236ff5294a7508ebb5afc014e4.tar.gz
blackbird-obmc-uboot-ce04bb41a60b87236ff5294a7508ebb5afc014e4.zip
Fix IXP code to work after relocation was added
- jump to real flash location after reset before turning off flash mirror - fix timer system to use HZ == 1000, remove broken interrupt-based code Signed-off-by: Michael Schwingen <michael@schwingen.org>
Diffstat (limited to 'arch/arm/cpu/ixp/start.S')
-rw-r--r--arch/arm/cpu/ixp/start.S59
1 files changed, 5 insertions, 54 deletions
diff --git a/arch/arm/cpu/ixp/start.S b/arch/arm/cpu/ixp/start.S
index 561c1f4795..faa9a8ff99 100644
--- a/arch/arm/cpu/ixp/start.S
+++ b/arch/arm/cpu/ixp/start.S
@@ -65,7 +65,8 @@
.endm
.globl _start
-_start: b reset
+_start:
+ ldr pc, _reset
ldr pc, _undefined_instruction
ldr pc, _software_interrupt
ldr pc, _prefetch_abort
@@ -74,6 +75,7 @@ _start: b reset
ldr pc, _irq
ldr pc, _fiq
+_reset: .word reset
_undefined_instruction: .word undefined_instruction
_software_interrupt: .word software_interrupt
_prefetch_abort: .word prefetch_abort
@@ -167,12 +169,6 @@ reset:
str r1, [r2]
/* make sure flash is visible at 0 */
-#if 0
- ldr r2, =IXP425_EXP_CFG0
- ldr r1, [r2]
- orr r1, r1, #0x80000000
- str r1, [r2]
-#endif
mov r1, #CONFIG_SYS_SDR_CONFIG
ldr r2, =IXP425_SDR_CONFIG
str r1, [r2]
@@ -216,19 +212,6 @@ reset:
str r1, [r4]
DELAY_FOR 0x4000, r0
- /* copy */
- mov r0, #0
- mov r4, r0
- add r2, r0, #CONFIG_SYS_MONITOR_LEN
- mov r1, #0x10000000
- mov r5, r1
-
- 30:
- ldr r3, [r0], #4
- str r3, [r1], #4
- cmp r0, r2
- bne 30b
-
/* invalidate I & D caches & BTB */
mcr p15, 0, r0, c7, c7, 0
CPWAIT r0
@@ -241,19 +224,12 @@ reset:
mcr p15, 0, r0, c7, c10, 4
CPWAIT r0
- /* move flash to 0x50000000 */
+ /* remove flash mirror at 0x00000000 */
ldr r2, =IXP425_EXP_CFG0
ldr r1, [r2]
bic r1, r1, #0x80000000
str r1, [r2]
- nop
- nop
- nop
- nop
- nop
- nop
-
/* invalidate I & Data TLB */
mcr p15, 0, r0, c8, c7, 0
CPWAIT r0
@@ -269,7 +245,7 @@ reset:
orr r0,r0,#0x13
msr cpsr,r0
-/* Set stackpointer in internal RAM to call board_init_f */
+/* Set initial stackpointer in SDRAM to call board_init_f */
call_board_init_f:
ldr sp, =(CONFIG_SYS_INIT_SP_ADDR)
bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
@@ -580,28 +556,3 @@ reset_endless:
b reset_endless
-#ifdef CONFIG_USE_IRQ
-
-.LC0: .word loops_per_jiffy
-
-/*
- * 0 <= r0 <= 2000
- */
-.globl __udelay
-__udelay:
- mov r2, #0x6800
- orr r2, r2, #0x00db
- mul r0, r2, r0
- ldr r2, .LC0
- ldr r2, [r2] @ max = 0x0fffffff
- mov r0, r0, lsr #11 @ max = 0x00003fff
- mov r2, r2, lsr #11 @ max = 0x0003ffff
- mul r0, r2, r0 @ max = 2^32-1
- movs r0, r0, lsr #6
-
-delay_loop:
- subs r0, r0, #1
- bne delay_loop
- mov pc, lr
-
-#endif /* CONFIG_USE_IRQ */
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