mirror of
https://github.com/AsahiLinux/u-boot
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2694bb9bcc
Signed-off-by: Marek Vasut <marex@denx.de> Cc: Stefano Babic <sbabic@denx.de> Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/*
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* (C) Copyright 2011
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* Ilya Yanok, EmCraft Systems
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc.
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*/
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#include <linux/types.h>
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#include <common.h>
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#ifndef CONFIG_SYS_DCACHE_OFF
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#ifndef CONFIG_SYS_CACHELINE_SIZE
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#define CONFIG_SYS_CACHELINE_SIZE 32
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#endif
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void invalidate_dcache_all(void)
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{
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asm volatile("mcr p15, 0, %0, c7, c6, 0\n" : : "r"(0));
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}
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void flush_dcache_all(void)
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{
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asm volatile(
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"0:"
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"mrc p15, 0, r15, c7, c14, 3\n"
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"bne 0b\n"
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"mcr p15, 0, %0, c7, c10, 4\n"
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: : "r"(0) : "memory"
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);
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}
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static int check_cache_range(unsigned long start, unsigned long stop)
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{
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int ok = 1;
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if (start & (CONFIG_SYS_CACHELINE_SIZE - 1))
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ok = 0;
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if (stop & (CONFIG_SYS_CACHELINE_SIZE - 1))
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ok = 0;
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if (!ok)
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debug("CACHE: Misaligned operation at range [%08lx, %08lx]\n",
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start, stop);
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return ok;
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}
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void invalidate_dcache_range(unsigned long start, unsigned long stop)
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{
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if (!check_cache_range(start, stop))
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return;
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while (start < stop) {
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asm volatile("mcr p15, 0, %0, c7, c6, 1\n" : : "r"(start));
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start += CONFIG_SYS_CACHELINE_SIZE;
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}
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}
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void flush_dcache_range(unsigned long start, unsigned long stop)
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{
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if (!check_cache_range(start, stop))
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return;
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while (start < stop) {
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asm volatile("mcr p15, 0, %0, c7, c14, 1\n" : : "r"(start));
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start += CONFIG_SYS_CACHELINE_SIZE;
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}
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asm volatile("mcr p15, 0, %0, c7, c10, 4\n" : : "r"(0));
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}
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void flush_cache(unsigned long start, unsigned long size)
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{
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flush_dcache_range(start, start + size);
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}
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#else /* #ifndef CONFIG_SYS_DCACHE_OFF */
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void invalidate_dcache_all(void)
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{
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}
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void flush_dcache_all(void)
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{
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}
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void invalidate_dcache_range(unsigned long start, unsigned long stop)
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{
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}
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void flush_dcache_range(unsigned long start, unsigned long stop)
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{
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}
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void flush_cache(unsigned long start, unsigned long size)
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{
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}
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#endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
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/*
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* Stub implementations for l2 cache operations
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*/
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void __l2_cache_disable(void) {}
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void l2_cache_disable(void)
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__attribute__((weak, alias("__l2_cache_disable")));
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