96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/*
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* (C) Copyright 2003
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* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/cacheops.h>
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#include <asm/mipsregs.h>
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static inline unsigned long icache_line_size(void)
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{
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unsigned long conf1, il;
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if (!config_enabled(CONFIG_SYS_CACHE_SIZE_AUTO))
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return CONFIG_SYS_ICACHE_LINE_SIZE;
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conf1 = read_c0_config1();
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il = (conf1 & MIPS_CONF1_IL) >> MIPS_CONF1_IL_SHF;
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if (!il)
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return 0;
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return 2 << il;
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}
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static inline unsigned long dcache_line_size(void)
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{
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unsigned long conf1, dl;
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if (!config_enabled(CONFIG_SYS_CACHE_SIZE_AUTO))
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return CONFIG_SYS_DCACHE_LINE_SIZE;
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conf1 = read_c0_config1();
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dl = (conf1 & MIPS_CONF1_DL) >> MIPS_CONF1_DL_SHF;
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if (!dl)
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return 0;
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return 2 << dl;
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}
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#define cache_loop(start, end, lsize, ops...) do { \
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const void *addr = (const void *)(start & ~(lsize - 1)); \
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const void *aend = (const void *)((end - 1) & ~(lsize - 1)); \
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const unsigned int cache_ops[] = { ops }; \
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unsigned int i; \
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\
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for (; addr <= aend; addr += lsize) { \
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for (i = 0; i < ARRAY_SIZE(cache_ops); i++) \
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mips_cache(cache_ops[i], addr); \
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} \
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} while (0)
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void flush_cache(ulong start_addr, ulong size)
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{
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unsigned long ilsize = icache_line_size();
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unsigned long dlsize = dcache_line_size();
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/* aend will be miscalculated when size is zero, so we return here */
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if (size == 0)
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return;
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if (ilsize == dlsize) {
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/* flush I-cache & D-cache simultaneously */
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cache_loop(start_addr, start_addr + size, ilsize,
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HIT_WRITEBACK_INV_D, HIT_INVALIDATE_I);
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return;
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}
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/* flush D-cache */
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cache_loop(start_addr, start_addr + size, dlsize, HIT_WRITEBACK_INV_D);
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/* flush I-cache */
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cache_loop(start_addr, start_addr + size, ilsize, HIT_INVALIDATE_I);
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}
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void flush_dcache_range(ulong start_addr, ulong stop)
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{
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unsigned long lsize = dcache_line_size();
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/* aend will be miscalculated when size is zero, so we return here */
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if (start_addr == stop)
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return;
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cache_loop(start_addr, stop, lsize, HIT_WRITEBACK_INV_D);
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}
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void invalidate_dcache_range(ulong start_addr, ulong stop)
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{
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unsigned long lsize = dcache_line_size();
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/* aend will be miscalculated when size is zero, so we return here */
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if (start_addr == stop)
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return;
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cache_loop(start_addr, stop, lsize, HIT_INVALIDATE_D);
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}
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