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bced7ccefa
If we call flush_cache(0xfffff000, 0x1000) it would never terminate the loop since end = 0xffffffff and we'd roll over our counter from 0xfffffe0 to 0 (assuming a 32-byte cache line) Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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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., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/cache.h>
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#include <watchdog.h>
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void flush_cache(ulong start_addr, ulong size)
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{
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#ifndef CONFIG_5xx
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ulong addr, start, end;
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start = start_addr & ~(CONFIG_SYS_CACHELINE_SIZE - 1);
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end = start_addr + size - 1;
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for (addr = start; (addr <= end) && (addr >= start);
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addr += CONFIG_SYS_CACHELINE_SIZE) {
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asm volatile("dcbst 0,%0" : : "r" (addr) : "memory");
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WATCHDOG_RESET();
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}
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/* wait for all dcbst to complete on bus */
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asm volatile("sync" : : : "memory");
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for (addr = start; (addr <= end) && (addr >= start);
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addr += CONFIG_SYS_CACHELINE_SIZE) {
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asm volatile("icbi 0,%0" : : "r" (addr) : "memory");
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WATCHDOG_RESET();
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}
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asm volatile("sync" : : : "memory");
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/* flush prefetch queue */
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asm volatile("isync" : : : "memory");
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#endif
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}
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