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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-07-09 01:03:17 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-07-31 21:34:56 +0100 |
| commit | e39e3f3ebfef03450cf7bfa7a974a8c61f7980c8 (patch) | |
| tree | f54303b9ba055b020579a3231ff36ea30b2f9044 /arch/arm/kernel | |
| parent | b9b32bf70f2fb710b07c94e13afbc729afe221da (diff) | |
| download | blackbird-obmc-linux-e39e3f3ebfef03450cf7bfa7a974a8c61f7980c8.tar.gz blackbird-obmc-linux-e39e3f3ebfef03450cf7bfa7a974a8c61f7980c8.zip | |
ARM: update FIQ support for relocation of vectors
FIQ should no longer copy the FIQ code into the user visible vector
page. Instead, it should use the hidden page. This change makes
that happen.
Cc: <stable@vger.kernel.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 3 | ||||
| -rw-r--r-- | arch/arm/kernel/fiq.c | 19 |
2 files changed, 17 insertions, 5 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 7e1ae91e5b1a..94caefb550bf 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -1120,6 +1120,9 @@ vector_addrexcptn: vector_fiq: subs pc, lr, #4 + .globl vector_fiq_offset + .equ vector_fiq_offset, vector_fiq + .section .vectors, "ax", %progbits __vectors_start: W(b) vector_rst diff --git a/arch/arm/kernel/fiq.c b/arch/arm/kernel/fiq.c index 2adda11f712f..25442f451148 100644 --- a/arch/arm/kernel/fiq.c +++ b/arch/arm/kernel/fiq.c @@ -47,6 +47,11 @@ #include <asm/irq.h> #include <asm/traps.h> +#define FIQ_OFFSET ({ \ + extern void *vector_fiq_offset; \ + (unsigned)&vector_fiq_offset; \ + }) + static unsigned long no_fiq_insn; /* Default reacquire function @@ -80,13 +85,16 @@ int show_fiq_list(struct seq_file *p, int prec) void set_fiq_handler(void *start, unsigned int length) { #if defined(CONFIG_CPU_USE_DOMAINS) - memcpy((void *)0xffff001c, start, length); + void *base = (void *)0xffff0000; #else - memcpy(vectors_page + 0x1c, start, length); + void *base = vectors_page; #endif - flush_icache_range(0xffff001c, 0xffff001c + length); + unsigned offset = FIQ_OFFSET; + + memcpy(base + offset, start, length); + flush_icache_range(0xffff0000 + offset, 0xffff0000 + offset + length); if (!vectors_high()) - flush_icache_range(0x1c, 0x1c + length); + flush_icache_range(offset, offset + length); } int claim_fiq(struct fiq_handler *f) @@ -144,6 +152,7 @@ EXPORT_SYMBOL(disable_fiq); void __init init_FIQ(int start) { - no_fiq_insn = *(unsigned long *)0xffff001c; + unsigned offset = FIQ_OFFSET; + no_fiq_insn = *(unsigned long *)(0xffff0000 + offset); fiq_start = start; } |
