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| author | Chris Metcalf <cmetcalf@tilera.com> | 2012-03-29 23:25:59 +0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2012-05-25 20:48:24 +0400 |
| commit | cd6f32aa088f4d328e676c35f51b440f2fe5b98c (patch) | |
| tree | 5668ff37a8690e5f5d919992756edb4466c37de2 /arch/tile/kernel/sys.c | |
| parent | d5d14ed6f2db7287a5088e1350cf422bf72140b3 (diff) | |
| download | linux-cd6f32aa088f4d328e676c35f51b440f2fe5b98c.tar.xz | |
arch/tile: support <asm/cachectl.h> header for cacheflush() syscall
We already had a syscall that did some dcache flushing, but it was
not used in practice. Make it MIPS compatible instead so it can
do both the DCACHE and ICACHE actions. We have code that wants to
be able to use the ICACHE flush mode from userspace so this change
enables that.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel/sys.c')
| -rw-r--r-- | arch/tile/kernel/sys.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/tile/kernel/sys.c b/arch/tile/kernel/sys.c index cb44ba7ccd2d..b08095b402d6 100644 --- a/arch/tile/kernel/sys.c +++ b/arch/tile/kernel/sys.c @@ -32,11 +32,17 @@ #include <asm/syscalls.h> #include <asm/pgtable.h> #include <asm/homecache.h> +#include <asm/cachectl.h> #include <arch/chip.h> -SYSCALL_DEFINE0(flush_cache) +SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len, + unsigned long, flags) { - homecache_evict(cpumask_of(smp_processor_id())); + if (flags & DCACHE) + homecache_evict(cpumask_of(smp_processor_id())); + if (flags & ICACHE) + flush_remote(0, HV_FLUSH_EVICT_L1I, mm_cpumask(current->mm), + 0, 0, 0, NULL, NULL, 0); return 0; } |