diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sh/mm/cache-sh3.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/sh/mm/cache-sh3.c')
-rw-r--r-- | arch/sh/mm/cache-sh3.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/arch/sh/mm/cache-sh3.c b/arch/sh/mm/cache-sh3.c new file mode 100644 index 00000000000..838731fc608 --- /dev/null +++ b/arch/sh/mm/cache-sh3.c @@ -0,0 +1,100 @@ +/* + * arch/sh/mm/cache-sh3.c + * + * Copyright (C) 1999, 2000 Niibe Yutaka + * Copyright (C) 2002 Paul Mundt + * + * Released under the terms of the GNU GPL v2.0. + */ + +#include <linux/init.h> +#include <linux/mman.h> +#include <linux/mm.h> +#include <linux/threads.h> +#include <asm/addrspace.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/processor.h> +#include <asm/cache.h> +#include <asm/io.h> +#include <asm/uaccess.h> +#include <asm/pgalloc.h> +#include <asm/mmu_context.h> +#include <asm/cacheflush.h> + +/* + * Write back the dirty D-caches, but not invalidate them. + * + * Is this really worth it, or should we just alias this routine + * to __flush_purge_region too? + * + * START: Virtual Address (U0, P1, or P3) + * SIZE: Size of the region. + */ + +void __flush_wback_region(void *start, int size) +{ + unsigned long v, j; + unsigned long begin, end; + unsigned long flags; + + 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) { + unsigned long addrstart = CACHE_OC_ADDRESS_ARRAY; + for (j = 0; j < cpu_data->dcache.ways; j++) { + unsigned long data, addr, p; + + p = __pa(v); + addr = addrstart | (v & cpu_data->dcache.entry_mask); + local_irq_save(flags); + data = ctrl_inl(addr); + + if ((data & CACHE_PHYSADDR_MASK) == + (p & CACHE_PHYSADDR_MASK)) { + data &= ~SH_CACHE_UPDATED; + ctrl_outl(data, addr); + local_irq_restore(flags); + break; + } + local_irq_restore(flags); + addrstart += cpu_data->dcache.way_incr; + } + } +} + +/* + * Write back the dirty D-caches and invalidate them. + * + * START: Virtual Address (U0, P1, or P3) + * SIZE: Size of the region. + */ +void __flush_purge_region(void *start, int size) +{ + 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) { + unsigned long data, addr; + + data = (v & 0xfffffc00); /* _Virtual_ address, ~U, ~V */ + addr = CACHE_OC_ADDRESS_ARRAY | + (v & cpu_data->dcache.entry_mask) | SH_CACHE_ASSOC; + ctrl_outl(data, addr); + } +} + +/* + * No write back please + * + * Except I don't think there's any way to avoid the writeback. So we + * just alias it to __flush_purge_region(). dwmw2. + */ +void __flush_invalidate_region(void *start, int size) + __attribute__((alias("__flush_purge_region"))); |