From: Yoshinori Sato Date: Mon, 4 Aug 2008 07:33:47 +0000 (+0900) Subject: SH2(A) cache update X-Git-Tag: v2.6.27-rc2~42^2~1 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cce2d453e4940d3fccd42a6917d01027148e11c3;p=linux-2.6 SH2(A) cache update Includes: - SH2 (7619) Writeback support. - SH2A cache handling fix. Signed-off-by: Yoshinori Sato Signed-off-by: Paul Mundt --- diff --git a/arch/sh/include/cpu-sh2/cpu/cache.h b/arch/sh/include/cpu-sh2/cpu/cache.h index 4e0b165006..673515bc41 100644 --- a/arch/sh/include/cpu-sh2/cpu/cache.h +++ b/arch/sh/include/cpu-sh2/cpu/cache.h @@ -21,11 +21,11 @@ #define CCR 0xffffffec #define CCR_CACHE_CE 0x01 /* Cache enable */ -#define CCR_CACHE_WT 0x06 /* CCR[bit1=1,bit2=1] */ +#define CCR_CACHE_WT 0x02 /* CCR[bit1=1,bit2=1] */ /* 0x00000000-0x7fffffff: Write-through */ /* 0x80000000-0x9fffffff: Write-back */ /* 0xc0000000-0xdfffffff: Write-through */ -#define CCR_CACHE_CB 0x00 /* CCR[bit1=0,bit2=0] */ +#define CCR_CACHE_CB 0x04 /* CCR[bit1=0,bit2=0] */ /* 0x00000000-0x7fffffff: Write-back */ /* 0x80000000-0x9fffffff: Write-through */ /* 0xc0000000-0xdfffffff: Write-back */ @@ -36,6 +36,8 @@ #define CCR_CACHE_ENABLE CCR_CACHE_CE #define CCR_CACHE_INVALIDATE CCR_CACHE_CF +#define CACHE_PHYSADDR_MASK 0x1ffffc00 + #endif #endif /* __ASM_CPU_SH2_CACHE_H */ diff --git a/arch/sh/include/cpu-sh2a/cpu/cache.h b/arch/sh/include/cpu-sh2a/cpu/cache.h index afe228b3f4..defb0baa5a 100644 --- a/arch/sh/include/cpu-sh2a/cpu/cache.h +++ b/arch/sh/include/cpu-sh2a/cpu/cache.h @@ -36,5 +36,8 @@ #define CCR_CACHE_ENABLE (CCR_CACHE_OCE | CCR_CACHE_ICE) #define CCR_CACHE_INVALIDATE (CCR_CACHE_OCI | CCR_CACHE_ICI) +#define CCR_ICACHE_INVALIDATE CCR_CACHE_ICI +#define CCR_OCACHE_INVALIDATE CCR_CACHE_OCI +#define CACHE_PHYSADDR_MASK 0x1ffffc00 #endif /* __ASM_CPU_SH2A_CACHE_H */ diff --git a/arch/sh/include/cpu-sh2a/cpu/cacheflush.h b/arch/sh/include/cpu-sh2a/cpu/cacheflush.h new file mode 100644 index 0000000000..3d3b9205d2 --- /dev/null +++ b/arch/sh/include/cpu-sh2a/cpu/cacheflush.h @@ -0,0 +1,34 @@ +#ifndef __ASM_CPU_SH2A_CACHEFLUSH_H +#define __ASM_CPU_SH2A_CACHEFLUSH_H + +/* + * Cache flushing: + * + * - flush_cache_all() flushes entire cache + * - flush_cache_mm(mm) flushes the specified mm context's cache lines + * - flush_cache_dup mm(mm) handles cache flushing when forking + * - flush_cache_page(mm, vmaddr, pfn) flushes a single page + * - flush_cache_range(vma, start, end) flushes a range of pages + * + * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache + * - flush_icache_range(start, end) flushes(invalidates) a range for icache + * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache + * + * Caches are indexed (effectively) by physical address on SH-2, so + * we don't need them. + */ +#define flush_cache_all() do { } while (0) +#define flush_cache_mm(mm) do { } while (0) +#define flush_cache_dup_mm(mm) do { } while (0) +#define flush_cache_range(vma, start, end) do { } while (0) +#define flush_cache_page(vma, vmaddr, pfn) do { } while (0) +#define flush_dcache_page(page) do { } while (0) +#define flush_dcache_mmap_lock(mapping) do { } while (0) +#define flush_dcache_mmap_unlock(mapping) do { } while (0) +void flush_icache_range(unsigned long start, unsigned long end); +#define flush_icache_page(vma,pg) do { } while (0) +#define flush_icache_user_range(vma,pg,adr,len) do { } while (0) +#define flush_cache_sigtramp(vaddr) do { } while (0) + +#define p3_cache_init() do { } while (0) +#endif /* __ASM_CPU_SH2A_CACHEFLUSH_H */ diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index 56d0a7daa3..9c131cac91 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig @@ -237,7 +237,6 @@ choice config CACHE_WRITEBACK bool "Write-back" - depends on CPU_SH2A || CPU_SH3 || CPU_SH4 || CPU_SH5 config CACHE_WRITETHROUGH bool "Write-through" diff --git a/arch/sh/mm/Makefile_32 b/arch/sh/mm/Makefile_32 index e295db60b9..70e0906023 100644 --- a/arch/sh/mm/Makefile_32 +++ b/arch/sh/mm/Makefile_32 @@ -5,12 +5,15 @@ obj-y := init.o extable_32.o consistent.o ifndef CONFIG_CACHE_OFF -obj-$(CONFIG_CPU_SH2) += cache-sh2.o -obj-$(CONFIG_CPU_SH3) += cache-sh3.o -obj-$(CONFIG_CPU_SH4) += cache-sh4.o -obj-$(CONFIG_SH7705_CACHE_32KB) += cache-sh7705.o +cache-$(CONFIG_CPU_SH2) := cache-sh2.o +cache-$(CONFIG_CPU_SH2A) := cache-sh2a.o +cache-$(CONFIG_CPU_SH3) := cache-sh3.o +cache-$(CONFIG_CPU_SH4) := cache-sh4.o +cache-$(CONFIG_SH7705_CACHE_32KB) += cache-sh7705.o endif +obj-y += $(cache-y) + mmu-y := tlb-nommu.o pg-nommu.o mmu-$(CONFIG_MMU) := fault_32.o tlbflush_32.o ioremap_32.o diff --git a/arch/sh/mm/cache-sh2.c b/arch/sh/mm/cache-sh2.c index 6614033f6b..c4e80d2b76 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 +} diff --git a/arch/sh/mm/cache-sh2a.c b/arch/sh/mm/cache-sh2a.c new file mode 100644 index 0000000000..62c0c5f351 --- /dev/null +++ b/arch/sh/mm/cache-sh2a.c @@ -0,0 +1,129 @@ +/* + * arch/sh/mm/cache-sh2a.c + * + * Copyright (C) 2008 Yoshinori Sato + * + * Released under the terms of the GNU GPL v2.0. + */ + +#include +#include + +#include +#include +#include +#include +#include + +void __flush_wback_region(void *start, int size) +{ + unsigned long v; + 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); + + local_irq_save(flags); + jump_to_uncached(); + + for (v = begin; v < end; v+=L1_CACHE_BYTES) { + unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0); + int way; + for (way = 0; way < 4; way++) { + unsigned long data = ctrl_inl(addr | (way << 11)); + if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) { + data &= ~SH_CACHE_UPDATED; + ctrl_outl(data, addr | (way << 11)); + } + } + } + + back_to_cached(); + local_irq_restore(flags); +} + +void __flush_purge_region(void *start, int size) +{ + unsigned long v; + 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); + + local_irq_save(flags); + jump_to_uncached(); + + for (v = begin; v < end; v+=L1_CACHE_BYTES) { + ctrl_outl((v & CACHE_PHYSADDR_MASK), + CACHE_OC_ADDRESS_ARRAY | (v & 0x000003f0) | 0x00000008); + } + back_to_cached(); + local_irq_restore(flags); +} + +void __flush_invalidate_region(void *start, int size) +{ + unsigned long v; + 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); + local_irq_save(flags); + jump_to_uncached(); + +#ifdef CONFIG_CACHE_WRITEBACK + ctrl_outl(ctrl_inl(CCR) | CCR_OCACHE_INVALIDATE, CCR); + /* I-cache invalidate */ + for (v = begin; v < end; v+=L1_CACHE_BYTES) { + ctrl_outl((v & CACHE_PHYSADDR_MASK), + CACHE_IC_ADDRESS_ARRAY | (v & 0x000003f0) | 0x00000008); + } +#else + for (v = begin; v < end; v+=L1_CACHE_BYTES) { + ctrl_outl((v & CACHE_PHYSADDR_MASK), + CACHE_IC_ADDRESS_ARRAY | (v & 0x000003f0) | 0x00000008); + ctrl_outl((v & CACHE_PHYSADDR_MASK), + CACHE_OC_ADDRESS_ARRAY | (v & 0x000003f0) | 0x00000008); + } +#endif + back_to_cached(); + local_irq_restore(flags); +} + +/* WBack O-Cache and flush I-Cache */ +void flush_icache_range(unsigned long start, unsigned long end) +{ + unsigned long v; + unsigned long flags; + + start = start & ~(L1_CACHE_BYTES-1); + end = (end + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1); + + local_irq_save(flags); + jump_to_uncached(); + + for (v = start; v < end; v+=L1_CACHE_BYTES) { + unsigned long addr = (v & 0x000007f0); + int way; + /* O-Cache writeback */ + for (way = 0; way < 4; way++) { + unsigned long data = ctrl_inl(CACHE_OC_ADDRESS_ARRAY | addr | (way << 11)); + if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) { + data &= ~SH_CACHE_UPDATED; + ctrl_outl(data, CACHE_OC_ADDRESS_ARRAY | addr | (way << 11)); + } + } + /* I-Cache invalidate */ + ctrl_outl(addr, + CACHE_IC_ADDRESS_ARRAY | addr | 0x00000008); + } + + back_to_cached(); + local_irq_restore(flags); +}