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authorMaurus Cuelenaere <mcuelenaere@gmail.com>2008-08-15 15:52:54 +0000
committerMaurus Cuelenaere <mcuelenaere@gmail.com>2008-08-15 15:52:54 +0000
commit63212628543e4f7e6b2e7a30c8c815231d1d3140 (patch)
treea4faf3ae046d56019332ffad4fb22a8b5d1c4f74 /firmware/target/mips/ingenic_jz47xx/crt0.S
parent57c0b6a4740d7a900dff7ff0230da1c7942a46b0 (diff)
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Jz4740: get exception handling working
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18287 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/mips/ingenic_jz47xx/crt0.S')
-rw-r--r--firmware/target/mips/ingenic_jz47xx/crt0.S18
1 files changed, 12 insertions, 6 deletions
diff --git a/firmware/target/mips/ingenic_jz47xx/crt0.S b/firmware/target/mips/ingenic_jz47xx/crt0.S
index 3d2308a578..b9ffde3b65 100644
--- a/firmware/target/mips/ingenic_jz47xx/crt0.S
+++ b/firmware/target/mips/ingenic_jz47xx/crt0.S
@@ -135,15 +135,14 @@ except_common_entry:
nop
nop
nop
-
+ .fill 0x20
+
.extern _int
.extern _exception
.global real_exception_handler
.type real_exception_handler,@function
.set noreorder
real_exception_handler:
-
-
addiu sp, -0x80
sw ra, 0(sp)
sw fp, 4(sp)
@@ -196,8 +195,7 @@ real_exception_handler:
and k0, k1
beq zero, k0, _int
nop
- la k0, _exception
- jr k0
+ j _exception
nop
.global _int
@@ -261,9 +259,17 @@ _int:
.global _exception
.type _exception,@function
_exception:
- move a0, sp
+ add a0, sp, $0
mfc0 a1, C0_CAUSE # C0_CAUSE of last exception
+ sll zero, 1
+ sll zero, 1
+ sll zero, 1
+ sll zero, 1
mfc0 a2, C0_EPC # Exception Program Counter
+ sll zero, 1
+ sll zero, 1
+ sll zero, 1
+ sll zero, 1
la k0, exception_handler
jr k0
nop