ENTRY(__flush_dcache_all) //保证之前的訪存指令的顺序 dsb sy //读cache level id register mrs x0,clidr_el1// read clidr //取bits[26:24](Level of Coherency for the cache hierarchy.) //须要遵循cache一致性的cache层级(比如有3级cache,但2级须要做一致性) and x3, x0, #0x7000000 // ...
//x1存储ccsidr_el1内容,低三位是(Log2(Number of bytes in cache line)) – 4 //加4后x2=(Log2(Numberof bytes in cache line)) and x2, x1, #7 // extract the length of the cachelines add x2, x2, #4 // add 4 (line length offset) mov x4, #0x3ff //逻辑右移3位,提取bits...
//如果需要做cache一致性的层级为0,则不需要flush,跳转到finished标记处。 cbz x3, finished // if loc is 0, then no need toclean //x10存放cache级,从level0 cache开始做flush //以下三个循环loop3是set/way(x9), //loop2是index(x7),loop1是cache level(x10) mov x10, #0 // start clean at...
//如果需要做cache一致性的层级为0,则不需要flush,跳转到finished标记处。 cbz x3, finished // if loc is 0, then no need toclean //x10存放cache级,从level0 cache开始做flush //以下三个循环loop3是set/way(x9), //loop2是index(x7),loop1是cache level(x10) mov x10, #0 // start clean at...
flush_dcache_all(); if(err==0) { lock_byte_mutex(&print_mutex); Expand DownExpand Up@@ -791,12 +791,14 @@ static void page_inv_up(void *src_addr, struct stressapptest_params *sat) for(inti=0;i<sat->block_num;i++) { ...
在驱动程序的设计中,我们可能会用到flush_cache_all将ARM cache的内容刷新到RAM,这是因为ARM Linux中cache一般会被设定为write back的。而通常象DMA是访问不了cache,所以如果我们需要启动DMA将RAM中的内容写到Flash中或LCD framebuffer,那么我们就需要调用flush_cache_all将cache中最新的内容刷新到RAM中。如果不这样...
Minimum Time Visiting All Points 2019-11-24 21:40 − On a plane there are n points with integer coordinates points[i] = [xi, yi]. Your task is to find the minimum time in seconds to visit a... 琴影 0 622 wx-all 2019-12-15 19:00 − ## 学习这部分时也学了不少代码...
To flush and invalidate the data cache, use the OEMCacheRangeFlush function instead.This function is called by the kernel to flush and invalidate the data cache. The data cache is flushed/invalidated when CacheSync is called.Copy void FlushDCache(void); ...
To flush and invalidate the data cache, use the OEMCacheRangeFlush function instead.This function is called by the kernel to flush and invalidate the data cache. The data cache is flushed/invalidated when CacheSync is called.複製 void FlushDCache(void); ...
void FlushDCache(void); Parameters None. Return Values None. Remarks Only the MIPS and ARM kernels support this function. This is a required function of OAL, first called inKernelStart. Requirements OS Versions:Windows CE .NET 4.0 and later. ...