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90 lines
2.2 KiB
90 lines
2.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* arch/sh/mm/cache-sh2.c |
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* |
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* Copyright (C) 2002 Paul Mundt |
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* Copyright (C) 2008 Yoshinori Sato |
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*/ |
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#include <linux/init.h> |
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#include <linux/mm.h> |
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#include <asm/cache.h> |
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#include <asm/addrspace.h> |
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#include <asm/processor.h> |
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#include <asm/cacheflush.h> |
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#include <asm/io.h> |
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static void sh2__flush_wback_region(void *start, int size) |
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{ |
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unsigned long v; |
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unsigned long begin, end; |
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begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); |
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end = ((unsigned long)start + size + L1_CACHE_BYTES-1) |
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& ~(L1_CACHE_BYTES-1); |
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for (v = begin; v < end; v+=L1_CACHE_BYTES) { |
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unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0); |
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int way; |
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for (way = 0; way < 4; way++) { |
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unsigned long data = __raw_readl(addr | (way << 12)); |
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if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) { |
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data &= ~SH_CACHE_UPDATED; |
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__raw_writel(data, addr | (way << 12)); |
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} |
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} |
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} |
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} |
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static void sh2__flush_purge_region(void *start, int size) |
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{ |
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unsigned long v; |
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unsigned long begin, end; |
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begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); |
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end = ((unsigned long)start + size + L1_CACHE_BYTES-1) |
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& ~(L1_CACHE_BYTES-1); |
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for (v = begin; v < end; v+=L1_CACHE_BYTES) |
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__raw_writel((v & CACHE_PHYSADDR_MASK), |
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CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008); |
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} |
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static void sh2__flush_invalidate_region(void *start, int size) |
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{ |
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#ifdef CONFIG_CACHE_WRITEBACK |
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/* |
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* SH-2 does not support individual line invalidation, only a |
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* global invalidate. |
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*/ |
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unsigned long ccr; |
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unsigned long flags; |
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local_irq_save(flags); |
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jump_to_uncached(); |
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ccr = __raw_readl(SH_CCR); |
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ccr |= CCR_CACHE_INVALIDATE; |
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__raw_writel(ccr, SH_CCR); |
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back_to_cached(); |
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local_irq_restore(flags); |
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#else |
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unsigned long v; |
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unsigned long begin, end; |
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begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); |
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end = ((unsigned long)start + size + L1_CACHE_BYTES-1) |
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& ~(L1_CACHE_BYTES-1); |
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for (v = begin; v < end; v+=L1_CACHE_BYTES) |
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__raw_writel((v & CACHE_PHYSADDR_MASK), |
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CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008); |
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#endif |
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} |
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void __init sh2_cache_init(void) |
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{ |
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__flush_wback_region = sh2__flush_wback_region; |
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__flush_purge_region = sh2__flush_purge_region; |
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__flush_invalidate_region = sh2__flush_invalidate_region; |
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}
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