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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/sh/mm/cache-sh2.c | |
parent | Initial commit. (diff) | |
download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/sh/mm/cache-sh2.c')
-rw-r--r-- | arch/sh/mm/cache-sh2.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/sh/mm/cache-sh2.c b/arch/sh/mm/cache-sh2.c new file mode 100644 index 000000000..a74259f2f --- /dev/null +++ b/arch/sh/mm/cache-sh2.c @@ -0,0 +1,91 @@ +/* + * 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. + */ + +#include <linux/init.h> +#include <linux/mm.h> + +#include <asm/cache.h> +#include <asm/addrspace.h> +#include <asm/processor.h> +#include <asm/cacheflush.h> +#include <asm/io.h> + +static void sh2__flush_wback_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 addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0); + int way; + for (way = 0; way < 4; way++) { + unsigned long data = __raw_readl(addr | (way << 12)); + if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) { + data &= ~SH_CACHE_UPDATED; + __raw_writel(data, addr | (way << 12)); + } + } + } +} + +static void sh2__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) + __raw_writel((v & CACHE_PHYSADDR_MASK), + CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008); +} + +static void sh2__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 = __raw_readl(SH_CCR); + ccr |= CCR_CACHE_INVALIDATE; + __raw_writel(ccr, SH_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) + __raw_writel((v & CACHE_PHYSADDR_MASK), + CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008); +#endif +} + +void __init sh2_cache_init(void) +{ + __flush_wback_region = sh2__flush_wback_region; + __flush_purge_region = sh2__flush_purge_region; + __flush_invalidate_region = sh2__flush_invalidate_region; +} |