^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * arch/sh/mm/cache-sh2a.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2008 Yoshinori Sato
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/cache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/addrspace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * The maximum number of pages we support up to when doing ranged dcache
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * flushing. Anything exceeding this will simply flush the dcache in its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * entirety.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define MAX_OCACHE_PAGES 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define MAX_ICACHE_PAGES 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #ifdef CONFIG_CACHE_WRITEBACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static void sh2a_flush_oc_line(unsigned long v, int way)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) unsigned long addr = (v & 0x000007f0) | (way << 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) unsigned long data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) data = __raw_readl(CACHE_OC_ADDRESS_ARRAY | addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) data &= ~SH_CACHE_UPDATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) __raw_writel(data, CACHE_OC_ADDRESS_ARRAY | addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static void sh2a_invalidate_line(unsigned long cache_addr, unsigned long v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* Set associative bit to hit all ways */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) unsigned long addr = (v & 0x000007f0) | SH_CACHE_ASSOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) __raw_writel((addr & CACHE_PHYSADDR_MASK), cache_addr | addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * Write back the dirty D-caches, but not invalidate them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static void sh2a__flush_wback_region(void *start, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #ifdef CONFIG_CACHE_WRITEBACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) unsigned long v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) unsigned long begin, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) int nr_ways;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) nr_ways = current_cpu_data.dcache.ways;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) jump_to_uncached();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /* If there are too many pages then flush the entire cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (((end - begin) >> PAGE_SHIFT) >= MAX_OCACHE_PAGES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) begin = CACHE_OC_ADDRESS_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) end = begin + (nr_ways * current_cpu_data.dcache.way_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) for (v = begin; v < end; v += L1_CACHE_BYTES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) unsigned long data = __raw_readl(v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (data & SH_CACHE_UPDATED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) __raw_writel(data & ~SH_CACHE_UPDATED, v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) int way;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) for (way = 0; way < nr_ways; way++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) for (v = begin; v < end; v += L1_CACHE_BYTES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) sh2a_flush_oc_line(v, way);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) back_to_cached();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * Write back the dirty D-caches and invalidate them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static void sh2a__flush_purge_region(void *start, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) unsigned long v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned long begin, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) jump_to_uncached();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) for (v = begin; v < end; v+=L1_CACHE_BYTES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #ifdef CONFIG_CACHE_WRITEBACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) int way;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) int nr_ways = current_cpu_data.dcache.ways;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) for (way = 0; way < nr_ways; way++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) sh2a_flush_oc_line(v, way);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) sh2a_invalidate_line(CACHE_OC_ADDRESS_ARRAY, v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) back_to_cached();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * Invalidate the D-caches, but no write back please
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static void sh2a__flush_invalidate_region(void *start, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) unsigned long v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) unsigned long begin, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) jump_to_uncached();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /* If there are too many pages then just blow the cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (((end - begin) >> PAGE_SHIFT) >= MAX_OCACHE_PAGES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) __raw_writel(__raw_readl(SH_CCR) | CCR_OCACHE_INVALIDATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) SH_CCR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) for (v = begin; v < end; v += L1_CACHE_BYTES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) sh2a_invalidate_line(CACHE_OC_ADDRESS_ARRAY, v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) back_to_cached();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * Write back the range of D-cache, and purge the I-cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static void sh2a_flush_icache_range(void *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct flusher_data *data = args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) unsigned long start, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) unsigned long v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) start = data->addr1 & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) end = (data->addr2 + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) #ifdef CONFIG_CACHE_WRITEBACK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) sh2a__flush_wback_region((void *)start, end-start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) jump_to_uncached();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /* I-Cache invalidate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) /* If there are too many pages then just blow the cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (((end - start) >> PAGE_SHIFT) >= MAX_ICACHE_PAGES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) __raw_writel(__raw_readl(SH_CCR) | CCR_ICACHE_INVALIDATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) SH_CCR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) for (v = start; v < end; v += L1_CACHE_BYTES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) sh2a_invalidate_line(CACHE_IC_ADDRESS_ARRAY, v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) back_to_cached();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) void __init sh2a_cache_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) local_flush_icache_range = sh2a_flush_icache_range;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) __flush_wback_region = sh2a__flush_wback_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) __flush_purge_region = sh2a__flush_purge_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) __flush_invalidate_region = sh2a__flush_invalidate_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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