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| author | Sonic Zhang <sonic.zhang@analog.com> | 2009-06-10 08:57:08 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2009-06-13 07:20:07 -0400 |
| commit | 47e9dedb720364e0adff0e99960fa294c6161f71 (patch) | |
| tree | fa5bcb532023a89fa11995e5ceca5ed5dfeabbba /arch/blackfin/mach-common | |
| parent | 2466ac65560ee8b7506eea3987aba9519355fd02 (diff) | |
| download | linux-47e9dedb720364e0adff0e99960fa294c6161f71.tar.gz linux-47e9dedb720364e0adff0e99960fa294c6161f71.tar.bz2 linux-47e9dedb720364e0adff0e99960fa294c6161f71.zip | |
Blackfin: add blackfin_invalidate_entire_icache for SMP systems
The KGDB code uses this when switching processors to make sure the icache
is in a valid state.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch/blackfin/mach-common')
| -rw-r--r-- | arch/blackfin/mach-common/cache-c.c | 14 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/smp.c | 11 |
2 files changed, 24 insertions, 1 deletions
diff --git a/arch/blackfin/mach-common/cache-c.c b/arch/blackfin/mach-common/cache-c.c index e6ab1f815123..b59ce3cb3807 100644 --- a/arch/blackfin/mach-common/cache-c.c +++ b/arch/blackfin/mach-common/cache-c.c @@ -16,9 +16,21 @@ void blackfin_invalidate_entire_dcache(void) { u32 dmem = bfin_read_DMEM_CONTROL(); - SSYNC(); bfin_write_DMEM_CONTROL(dmem & ~0xc); SSYNC(); bfin_write_DMEM_CONTROL(dmem); SSYNC(); } + +/* Invalidate the Entire Instruction cache by + * clearing IMC bit + */ +void blackfin_invalidate_entire_icache(void) +{ + u32 imem = bfin_read_IMEM_CONTROL(); + bfin_write_IMEM_CONTROL(imem & ~0x4); + SSYNC(); + bfin_write_IMEM_CONTROL(imem); + SSYNC(); +} + diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c index 3b8ebaee77f2..c187da2448bf 100644 --- a/arch/blackfin/mach-common/smp.c +++ b/arch/blackfin/mach-common/smp.c @@ -468,6 +468,17 @@ void smp_icache_flush_range_others(unsigned long start, unsigned long end) } EXPORT_SYMBOL_GPL(smp_icache_flush_range_others); +#ifdef __ARCH_SYNC_CORE_ICACHE +void resync_core_icache(void) +{ + unsigned int cpu = get_cpu(); + blackfin_invalidate_entire_icache(); + ++per_cpu(cpu_data, cpu).icache_invld_count; + put_cpu(); +} +EXPORT_SYMBOL(resync_core_icache); +#endif + #ifdef __ARCH_SYNC_CORE_DCACHE unsigned long barrier_mask __attribute__ ((__section__(".l2.bss"))); |