1*1da177e4SLinus Torvalds /* 2*1da177e4SLinus Torvalds * arch/sh/mm/cache-sh3.c 3*1da177e4SLinus Torvalds * 4*1da177e4SLinus Torvalds * Copyright (C) 1999, 2000 Niibe Yutaka 5*1da177e4SLinus Torvalds * Copyright (C) 2002 Paul Mundt 6*1da177e4SLinus Torvalds * 7*1da177e4SLinus Torvalds * Released under the terms of the GNU GPL v2.0. 8*1da177e4SLinus Torvalds */ 9*1da177e4SLinus Torvalds 10*1da177e4SLinus Torvalds #include <linux/init.h> 11*1da177e4SLinus Torvalds #include <linux/mman.h> 12*1da177e4SLinus Torvalds #include <linux/mm.h> 13*1da177e4SLinus Torvalds #include <linux/threads.h> 14*1da177e4SLinus Torvalds #include <asm/addrspace.h> 15*1da177e4SLinus Torvalds #include <asm/page.h> 16*1da177e4SLinus Torvalds #include <asm/pgtable.h> 17*1da177e4SLinus Torvalds #include <asm/processor.h> 18*1da177e4SLinus Torvalds #include <asm/cache.h> 19*1da177e4SLinus Torvalds #include <asm/io.h> 20*1da177e4SLinus Torvalds #include <asm/uaccess.h> 21*1da177e4SLinus Torvalds #include <asm/pgalloc.h> 22*1da177e4SLinus Torvalds #include <asm/mmu_context.h> 23*1da177e4SLinus Torvalds #include <asm/cacheflush.h> 24*1da177e4SLinus Torvalds 25*1da177e4SLinus Torvalds /* 26*1da177e4SLinus Torvalds * Write back the dirty D-caches, but not invalidate them. 27*1da177e4SLinus Torvalds * 28*1da177e4SLinus Torvalds * Is this really worth it, or should we just alias this routine 29*1da177e4SLinus Torvalds * to __flush_purge_region too? 30*1da177e4SLinus Torvalds * 31*1da177e4SLinus Torvalds * START: Virtual Address (U0, P1, or P3) 32*1da177e4SLinus Torvalds * SIZE: Size of the region. 33*1da177e4SLinus Torvalds */ 34*1da177e4SLinus Torvalds 35*1da177e4SLinus Torvalds void __flush_wback_region(void *start, int size) 36*1da177e4SLinus Torvalds { 37*1da177e4SLinus Torvalds unsigned long v, j; 38*1da177e4SLinus Torvalds unsigned long begin, end; 39*1da177e4SLinus Torvalds unsigned long flags; 40*1da177e4SLinus Torvalds 41*1da177e4SLinus Torvalds begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); 42*1da177e4SLinus Torvalds end = ((unsigned long)start + size + L1_CACHE_BYTES-1) 43*1da177e4SLinus Torvalds & ~(L1_CACHE_BYTES-1); 44*1da177e4SLinus Torvalds 45*1da177e4SLinus Torvalds for (v = begin; v < end; v+=L1_CACHE_BYTES) { 46*1da177e4SLinus Torvalds unsigned long addrstart = CACHE_OC_ADDRESS_ARRAY; 47*1da177e4SLinus Torvalds for (j = 0; j < cpu_data->dcache.ways; j++) { 48*1da177e4SLinus Torvalds unsigned long data, addr, p; 49*1da177e4SLinus Torvalds 50*1da177e4SLinus Torvalds p = __pa(v); 51*1da177e4SLinus Torvalds addr = addrstart | (v & cpu_data->dcache.entry_mask); 52*1da177e4SLinus Torvalds local_irq_save(flags); 53*1da177e4SLinus Torvalds data = ctrl_inl(addr); 54*1da177e4SLinus Torvalds 55*1da177e4SLinus Torvalds if ((data & CACHE_PHYSADDR_MASK) == 56*1da177e4SLinus Torvalds (p & CACHE_PHYSADDR_MASK)) { 57*1da177e4SLinus Torvalds data &= ~SH_CACHE_UPDATED; 58*1da177e4SLinus Torvalds ctrl_outl(data, addr); 59*1da177e4SLinus Torvalds local_irq_restore(flags); 60*1da177e4SLinus Torvalds break; 61*1da177e4SLinus Torvalds } 62*1da177e4SLinus Torvalds local_irq_restore(flags); 63*1da177e4SLinus Torvalds addrstart += cpu_data->dcache.way_incr; 64*1da177e4SLinus Torvalds } 65*1da177e4SLinus Torvalds } 66*1da177e4SLinus Torvalds } 67*1da177e4SLinus Torvalds 68*1da177e4SLinus Torvalds /* 69*1da177e4SLinus Torvalds * Write back the dirty D-caches and invalidate them. 70*1da177e4SLinus Torvalds * 71*1da177e4SLinus Torvalds * START: Virtual Address (U0, P1, or P3) 72*1da177e4SLinus Torvalds * SIZE: Size of the region. 73*1da177e4SLinus Torvalds */ 74*1da177e4SLinus Torvalds void __flush_purge_region(void *start, int size) 75*1da177e4SLinus Torvalds { 76*1da177e4SLinus Torvalds unsigned long v; 77*1da177e4SLinus Torvalds unsigned long begin, end; 78*1da177e4SLinus Torvalds 79*1da177e4SLinus Torvalds begin = (unsigned long)start & ~(L1_CACHE_BYTES-1); 80*1da177e4SLinus Torvalds end = ((unsigned long)start + size + L1_CACHE_BYTES-1) 81*1da177e4SLinus Torvalds & ~(L1_CACHE_BYTES-1); 82*1da177e4SLinus Torvalds 83*1da177e4SLinus Torvalds for (v = begin; v < end; v+=L1_CACHE_BYTES) { 84*1da177e4SLinus Torvalds unsigned long data, addr; 85*1da177e4SLinus Torvalds 86*1da177e4SLinus Torvalds data = (v & 0xfffffc00); /* _Virtual_ address, ~U, ~V */ 87*1da177e4SLinus Torvalds addr = CACHE_OC_ADDRESS_ARRAY | 88*1da177e4SLinus Torvalds (v & cpu_data->dcache.entry_mask) | SH_CACHE_ASSOC; 89*1da177e4SLinus Torvalds ctrl_outl(data, addr); 90*1da177e4SLinus Torvalds } 91*1da177e4SLinus Torvalds } 92*1da177e4SLinus Torvalds 93*1da177e4SLinus Torvalds /* 94*1da177e4SLinus Torvalds * No write back please 95*1da177e4SLinus Torvalds * 96*1da177e4SLinus Torvalds * Except I don't think there's any way to avoid the writeback. So we 97*1da177e4SLinus Torvalds * just alias it to __flush_purge_region(). dwmw2. 98*1da177e4SLinus Torvalds */ 99*1da177e4SLinus Torvalds void __flush_invalidate_region(void *start, int size) 100*1da177e4SLinus Torvalds __attribute__((alias("__flush_purge_region"))); 101