| /* |
| * 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. |
| */ |
| |
| static void sh3__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 < current_cpu_data.dcache.ways; j++) { |
| unsigned long data, addr, p; |
| |
| p = __pa(v); |
| addr = addrstart | (v & current_cpu_data.dcache.entry_mask); |
| local_irq_save(flags); |
| data = __raw_readl(addr); |
| |
| if ((data & CACHE_PHYSADDR_MASK) == |
| (p & CACHE_PHYSADDR_MASK)) { |
| data &= ~SH_CACHE_UPDATED; |
| __raw_writel(data, addr); |
| local_irq_restore(flags); |
| break; |
| } |
| local_irq_restore(flags); |
| addrstart += current_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. |
| */ |
| static void sh3__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 & current_cpu_data.dcache.entry_mask) | SH_CACHE_ASSOC; |
| __raw_writel(data, addr); |
| } |
| } |
| |
| void __init sh3_cache_init(void) |
| { |
| __flush_wback_region = sh3__flush_wback_region; |
| __flush_purge_region = sh3__flush_purge_region; |
| |
| /* |
| * No write back please |
| * |
| * Except I don't think there's any way to avoid the writeback. |
| * So we just alias it to sh3__flush_purge_region(). dwmw2. |
| */ |
| __flush_invalidate_region = sh3__flush_purge_region; |
| } |