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authorPaul Brook <paul@codesourcery.com>2008-04-18 22:43:07 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2008-04-18 22:43:07 +0100
commit48d7927bdf071d05cf5d15b816cf06b0937cb84f (patch)
tree60f82f25897f9b3fd55148edac9348b451afc6cf /arch/arm/kernel
parentd7f864be8323e5394040e2877594645b0e7da85d (diff)
downloadop-kernel-dev-48d7927bdf071d05cf5d15b816cf06b0937cb84f.zip
op-kernel-dev-48d7927bdf071d05cf5d15b816cf06b0937cb84f.tar.gz
Add a prefetch abort handler
This patch adds a prefetch abort handler similar to the data abort one and renames the latter for consistency. Initial implementation by Paul Brook with some renaming by Catalin Marinas. Signed-off-by: Paul Brook <paul@codesourcery.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/asm-offsets.c7
-rw-r--r--arch/arm/kernel/entry-armv.S34
-rw-r--r--arch/arm/kernel/entry-common.S5
3 files changed, 36 insertions, 10 deletions
diff --git a/arch/arm/kernel/asm-offsets.c b/arch/arm/kernel/asm-offsets.c
index 6604b47..0a0d247 100644
--- a/arch/arm/kernel/asm-offsets.c
+++ b/arch/arm/kernel/asm-offsets.c
@@ -111,5 +111,12 @@ int main(void)
DEFINE(PROCINFO_INITFUNC, offsetof(struct proc_info_list, __cpu_flush));
DEFINE(PROCINFO_MM_MMUFLAGS, offsetof(struct proc_info_list, __cpu_mm_mmu_flags));
DEFINE(PROCINFO_IO_MMUFLAGS, offsetof(struct proc_info_list, __cpu_io_mmu_flags));
+ BLANK();
+#ifdef MULTI_DABORT
+ DEFINE(PROCESSOR_DABT_FUNC, offsetof(struct processor, _data_abort));
+#endif
+#ifdef MULTI_PABORT
+ DEFINE(PROCESSOR_PABT_FUNC, offsetof(struct processor, _prefetch_abort));
+#endif
return 0;
}
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index a46d5b4..5e647eb 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -166,12 +166,12 @@ __dabt_svc:
@ The abort handler must return the aborted address in r0, and
@ the fault status register in r1. r9 must be preserved.
@
-#ifdef MULTI_ABORT
+#ifdef MULTI_DABORT
ldr r4, .LCprocfns
mov lr, pc
- ldr pc, [r4]
+ ldr pc, [r4, #PROCESSOR_DABT_FUNC]
#else
- bl CPU_ABORT_HANDLER
+ bl CPU_DABORT_HANDLER
#endif
@
@@ -293,7 +293,6 @@ __pabt_svc:
mrs r9, cpsr
tst r3, #PSR_I_BIT
biceq r9, r9, #PSR_I_BIT
- msr cpsr_c, r9
@
@ set args, then call main handler
@@ -301,7 +300,15 @@ __pabt_svc:
@ r0 - address of faulting instruction
@ r1 - pointer to registers on stack
@
- mov r0, r2 @ address (pc)
+#ifdef MULTI_PABORT
+ mov r0, r2 @ pass address of aborted instruction.
+ ldr r4, .LCprocfns
+ mov lr, pc
+ ldr pc, [r4, #PROCESSOR_PABT_FUNC]
+#else
+ CPU_PABORT_HANDLER(r0, r2)
+#endif
+ msr cpsr_c, r9 @ Maybe enable interrupts
mov r1, sp @ regs
bl do_PrefetchAbort @ call abort handler
@@ -320,7 +327,7 @@ __pabt_svc:
.align 5
.LCcralign:
.word cr_alignment
-#ifdef MULTI_ABORT
+#ifdef MULTI_DABORT
.LCprocfns:
.word processor
#endif
@@ -404,12 +411,12 @@ __dabt_usr:
@ The abort handler must return the aborted address in r0, and
@ the fault status register in r1.
@
-#ifdef MULTI_ABORT
+#ifdef MULTI_DABORT
ldr r4, .LCprocfns
mov lr, pc
- ldr pc, [r4]
+ ldr pc, [r4, #PROCESSOR_DABT_FUNC]
#else
- bl CPU_ABORT_HANDLER
+ bl CPU_DABORT_HANDLER
#endif
@
@@ -619,8 +626,15 @@ __und_usr_unknown:
__pabt_usr:
usr_entry
+#ifdef MULTI_PABORT
+ mov r0, r2 @ pass address of aborted instruction.
+ ldr r4, .LCprocfns
+ mov lr, pc
+ ldr pc, [r4, #PROCESSOR_PABT_FUNC]
+#else
+ CPU_PABORT_HANDLER(r0, r2)
+#endif
enable_irq @ Enable interrupts
- mov r0, r2 @ address (pc)
mov r1, sp @ regs
bl do_PrefetchAbort @ call abort handler
/* fall through */
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 6c90c50..597ed00 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -352,6 +352,11 @@ sys_mmap2:
b do_mmap2
#endif
+ENTRY(pabort_ifar)
+ mrc p15, 0, r0, cr6, cr0, 2
+ENTRY(pabort_noifar)
+ mov pc, lr
+
#ifdef CONFIG_OABI_COMPAT
/*
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