On 10/06/2015 02:55 PM, Thomas Chou wrote:
Convert copy_exception_trampoline() to use dm cpu data.
Signed-off-by: Thomas Chou <[email protected]>
---
v2
fix exception address references.
arch/nios2/cpu/cpu.c | 24 ++++++++++++++++++++++++
arch/nios2/cpu/start.S | 24 +-----------------------
2 files changed, 25 insertions(+), 23 deletions(-)
Applied to u-boot-nios.
diff --git a/arch/nios2/cpu/cpu.c b/arch/nios2/cpu/cpu.c
index 229a07b..5403c0d 100644
--- a/arch/nios2/cpu/cpu.c
+++ b/arch/nios2/cpu/cpu.c
@@ -44,6 +44,27 @@ void dcache_disable(void)
flush_dcache(CONFIG_SYS_DCACHE_SIZE, CONFIG_SYS_DCACHELINE_SIZE);
}
+/*
+ * COPY EXCEPTION TRAMPOLINE -- copy the tramp to the
+ * exception address. Define CONFIG_ROM_STUBS to prevent
+ * the copy (e.g. exception in flash or in other
+ * softare/firmware component).
+ */
+#ifndef CONFIG_ROM_STUBS
+static void copy_exception_trampoline(void)
+{
+ extern int _except_start, _except_end;
+ void *except_target = (void *)gd->arch.exception_addr;
+
+ if (&_except_start != except_target) {
+ memcpy(except_target, &_except_start,
+ &_except_end - &_except_start);
+ flush_cache(gd->arch.exception_addr,
+ &_except_end - &_except_start);
+ }
+}
+#endif
+
int arch_cpu_init_dm(void)
{
struct udevice *dev;
@@ -56,6 +77,9 @@ int arch_cpu_init_dm(void)
return -ENODEV;
gd->ram_size = CONFIG_SYS_SDRAM_SIZE;
+#ifndef CONFIG_ROM_STUBS
+ copy_exception_trampoline();
+#endif
return 0;
}
diff --git a/arch/nios2/cpu/start.S b/arch/nios2/cpu/start.S
index 6c7c777..90e0310 100644
--- a/arch/nios2/cpu/start.S
+++ b/arch/nios2/cpu/start.S
@@ -14,7 +14,7 @@
************************************************************************/
.text
- .global _start
+ .global _start, _except_start, _except_end
_start:
wrctl status, r0 /* Disable interrupts */
@@ -89,28 +89,6 @@ _cur: movhi r5, %hi(_cur - _start)
jmp r4
_reloc:
- /* COPY EXCEPTION TRAMPOLINE -- copy the tramp to the
- * exception address. Define CONFIG_ROM_STUBS to prevent
- * the copy (e.g. exception in flash or in other
- * softare/firmware component).
- */
-#if !defined(CONFIG_ROM_STUBS)
- movhi r4, %hi(_except_start)
- ori r4, r4, %lo(_except_start)
- movhi r5, %hi(_except_end)
- ori r5, r5, %lo(_except_end)
- movhi r6, %hi(CONFIG_SYS_EXCEPTION_ADDR)
- ori r6, r6, %lo(CONFIG_SYS_EXCEPTION_ADDR)
- beq r4, r6, 7f /* Skip if at proper addr */
-
-6: ldwio r7, 0(r4)
- stwio r7, 0(r6)
- addi r4, r4, 4
- addi r6, r6, 4
- bne r4, r5, 6b
-7:
-#endif
-
/* STACK INIT -- zero top two words for call back chain.
*/
movhi sp, %hi(CONFIG_SYS_INIT_SP)
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