115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
/*
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* File : cache.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2010, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-05-17 swkyer first version
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*/
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#include <rtthread.h>
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#include "mipscfg.h"
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#include "cache.h"
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extern void cache_init(rt_ubase_t cache_size, rt_ubase_t cache_line_size);
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void r4k_cache_init(void)
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{
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cache_init(dcache_size, cpu_dcache_line_size());
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}
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void r4k_cache_flush_all(void)
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{
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blast_dcache16();
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blast_icache16();
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}
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void r4k_icache_flush_all(void)
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{
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blast_icache16();
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}
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void r4k_icache_flush_range(rt_ubase_t addr, rt_ubase_t size)
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{
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rt_ubase_t end, a;
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if (size > icache_size)
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{
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blast_icache16();
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}
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else
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{
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rt_ubase_t ic_lsize = cpu_icache_line_size();
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a = addr & ~(ic_lsize - 1);
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end = ((addr + size) - 1) & ~(ic_lsize - 1);
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while (1)
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{
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flush_icache_line(a);
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if (a == end)
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break;
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a += ic_lsize;
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}
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}
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}
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void r4k_icache_lock_range(rt_ubase_t addr, rt_ubase_t size)
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{
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rt_ubase_t end, a;
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rt_ubase_t ic_lsize = cpu_icache_line_size();
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a = addr & ~(ic_lsize - 1);
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end = ((addr + size) - 1) & ~(ic_lsize - 1);
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while (1)
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{
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lock_icache_line(a);
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if (a == end)
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break;
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a += ic_lsize;
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}
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}
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void r4k_dcache_inv(rt_ubase_t addr, rt_ubase_t size)
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{
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rt_ubase_t end, a;
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rt_ubase_t dc_lsize = cpu_dcache_line_size();
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a = addr & ~(dc_lsize - 1);
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end = ((addr + size) - 1) & ~(dc_lsize - 1);
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while (1)
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{
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invalidate_dcache_line(a);
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if (a == end)
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break;
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a += dc_lsize;
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}
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}
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void r4k_dcache_wback_inv(rt_ubase_t addr, rt_ubase_t size)
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{
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rt_ubase_t end, a;
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if (size >= dcache_size)
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{
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blast_dcache16();
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}
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else
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{
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rt_ubase_t dc_lsize = cpu_dcache_line_size();
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a = addr & ~(dc_lsize - 1);
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end = ((addr + size) - 1) & ~(dc_lsize - 1);
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while (1)
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{
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flush_dcache_line(a);
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if (a == end)
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break;
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a += dc_lsize;
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}
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}
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}
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