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author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-08-07 10:55:03 +0200 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-08-07 10:55:03 +0200 |
commit | 4fb8af10d0fd09372d52966b76922b9e82bbc950 (patch) | |
tree | d240e4d40357583e3f3eb228dccf20122a5b31ed /arch/sh/mm/cache-sh2.c | |
parent | [ARM] Add support for arch/arm/mach-*/include and arch/arm/plat-*/include (diff) | |
parent | kbuild: a better way to generate cscope database change (diff) | |
download | linux-4fb8af10d0fd09372d52966b76922b9e82bbc950.tar.xz linux-4fb8af10d0fd09372d52966b76922b9e82bbc950.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-fixes
Diffstat (limited to 'arch/sh/mm/cache-sh2.c')
-rw-r--r-- | arch/sh/mm/cache-sh2.c | 45 |
1 files changed, 36 insertions, 9 deletions
diff --git a/arch/sh/mm/cache-sh2.c b/arch/sh/mm/cache-sh2.c index 6614033f6be9..c4e80d2b764b 100644 --- a/arch/sh/mm/cache-sh2.c +++ b/arch/sh/mm/cache-sh2.c @@ -2,6 +2,7 @@ * arch/sh/mm/cache-sh2.c * * Copyright (C) 2002 Paul Mundt + * Copyright (C) 2008 Yoshinori Sato * * Released under the terms of the GNU GPL v2.0. */ @@ -24,8 +25,15 @@ void __flush_wback_region(void *start, int size) end = ((unsigned long)start + size + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1); for (v = begin; v < end; v+=L1_CACHE_BYTES) { - /* FIXME cache purge */ - ctrl_outl((v & 0x1ffffc00), (v & 0x00000ff0) | 0x00000008); + unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0); + int way; + for (way = 0; way < 4; way++) { + unsigned long data = ctrl_inl(addr | (way << 12)); + if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) { + data &= ~SH_CACHE_UPDATED; + ctrl_outl(data, addr | (way << 12)); + } + } } } @@ -37,21 +45,40 @@ void __flush_purge_region(void *start, int size) begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); end = ((unsigned long)start + size + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1); - for (v = begin; v < end; v+=L1_CACHE_BYTES) { - ctrl_outl((v & 0x1ffffc00), (v & 0x00000ff0) | 0x00000008); - } + + for (v = begin; v < end; v+=L1_CACHE_BYTES) + ctrl_outl((v & CACHE_PHYSADDR_MASK), + CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008); } void __flush_invalidate_region(void *start, int size) { +#ifdef CONFIG_CACHE_WRITEBACK + /* + * SH-2 does not support individual line invalidation, only a + * global invalidate. + */ + unsigned long ccr; + unsigned long flags; + local_irq_save(flags); + jump_to_uncached(); + + ccr = ctrl_inl(CCR); + ccr |= CCR_CACHE_INVALIDATE; + ctrl_outl(ccr, CCR); + + back_to_cached(); + local_irq_restore(flags); +#else unsigned long v; unsigned long begin, end; begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); end = ((unsigned long)start + size + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1); - for (v = begin; v < end; v+=L1_CACHE_BYTES) { - ctrl_outl((v & 0x1ffffc00), (v & 0x00000ff0) | 0x00000008); - } -} + for (v = begin; v < end; v+=L1_CACHE_BYTES) + ctrl_outl((v & CACHE_PHYSADDR_MASK), + CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008); +#endif +} |