^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-sh3.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1999, 2000 Niibe Yutaka
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2002 Paul Mundt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/threads.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/addrspace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/cache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/mmu_context.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Write back the dirty D-caches, but not invalidate them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * Is this really worth it, or should we just alias this routine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * to __flush_purge_region too?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * START: Virtual Address (U0, P1, or P3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * SIZE: Size of the region.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static void sh3__flush_wback_region(void *start, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) unsigned long v, j;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) unsigned long begin, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) for (v = begin; v < end; v+=L1_CACHE_BYTES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned long addrstart = CACHE_OC_ADDRESS_ARRAY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) for (j = 0; j < current_cpu_data.dcache.ways; j++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) unsigned long data, addr, p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) p = __pa(v);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) addr = addrstart | (v & current_cpu_data.dcache.entry_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) data = __raw_readl(addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if ((data & CACHE_PHYSADDR_MASK) ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) (p & CACHE_PHYSADDR_MASK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) data &= ~SH_CACHE_UPDATED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) __raw_writel(data, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) addrstart += current_cpu_data.dcache.way_incr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * Write back the dirty D-caches and invalidate them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) * START: Virtual Address (U0, P1, or P3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * SIZE: Size of the region.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static void sh3__flush_purge_region(void *start, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) unsigned long v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) unsigned long begin, end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) & ~(L1_CACHE_BYTES-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) for (v = begin; v < end; v+=L1_CACHE_BYTES) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) unsigned long data, addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) data = (v & 0xfffffc00); /* _Virtual_ address, ~U, ~V */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) addr = CACHE_OC_ADDRESS_ARRAY |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) (v & current_cpu_data.dcache.entry_mask) | SH_CACHE_ASSOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) __raw_writel(data, addr);
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) void __init sh3_cache_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) __flush_wback_region = sh3__flush_wback_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) __flush_purge_region = sh3__flush_purge_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * No write back please
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * Except I don't think there's any way to avoid the writeback.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) * So we just alias it to sh3__flush_purge_region(). dwmw2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) __flush_invalidate_region = sh3__flush_purge_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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