invalidate_dcache_range函数是一个在嵌入式系统和操作系统中常用的函数,特别是在涉及到直接内存访问(DMA)操作时。以下是关于invalidate_dcache_range函数的详细解释: 1. invalidate_dcache_range函数的作用invalidate_dcache_range函数用于使指定范围内的数据缓存(D-cache)中的数据无效。这意味着CPU在访问这些内存地址...
*/invalidate_dcache_range(desc_start, desc_end);/* Check if the descriptor is owned by CPU */if(desc_p->txrx_status & DESC_TXSTS_OWNBYDMA) {printf("CPU not owner of tx frame\n");return-EPERM; }memcpy((void*)data_start, packet, length);/* Flush data to be sent */flush_dca...
在sdk调试ddr的时候,想要使用memory窗口观察写入情况,需要使用到Xil_DCacheInvalidateRange函数无效化数据缓存,memory窗口才能刷新最新的数据。 Xil_DCacheInvalidateRange 这个函数用于无效化指定范围内的数据缓存。当你无效化缓存时,缓存中的数据将被标记为无效,但是并不会写回主存储器。这在你确定缓存中的数据已经过时...
When the DMA completes, I use Xil_DCacheInvalidateRange() on the destination buffer, and then check the data values for correctness. I find that unless I disable the cache completely (Xil_DCacheDisable) or call Xil_DCacheInvalidateRange() on a range larger than my buffer, then my buffer ...
60671 - 2014.1 SDK: BSP standalone v4.0 Xil_DCacheInvalidateRange boundary check issues cause more cachelines to be invalidated Description This issue arises in the standalone_v4_0 BSP in Vivado Design Suite 2014.1. The "Xil_DCacheInvalidateRange" API in src/cortexa9/xil_cache.c is invalida...
@@ -19,7 +19,7 @@ __weak void flush_dcache_range(unsigned long start, unsigned long end) { } void invalidate_icache_range(unsigned long start, unsigned long end) __weak void invalidate_icache_range(unsigned long start, unsigned long end) { /* * RISC-V does not have an instructio...
orca_flush_dcache_range((void *)base_to_flush, (void *)last_to_flush); //Write initial test pattern for(int word = 0; word < (cache_size/sizeof(uint32_t)); word++){ mem_base32[word] = 0-word; } //Flush/invalidate and overwrite the range to test if(invalidate){ orca_invali...
1. i don't know the meaning of the function parameter Xil_DCacheInvalidateRange(addr,size);, if i capture len, what size should I set for Xil_DCacheInvalidateRange. 2. in function Xil_DCacheInvalidateRange, i see this: ... int32_t cache...
flush_dcache_range(addr, addr + size);elseinvalidate_dcache_range(addr, addr + size); } 开发者ID:IngenicC,项目名称:u-boot,代码行数:12,代码来源:ehci-hcd.c 示例3: rtl_inval_buffer ▲点赞 4▼ staticvoidrtl_inval_buffer(void*buf,size_tsize){unsignedlongstart = (unsignedlong)buf & ~...
1. i don't know the meaning of the function parameter Xil_DCacheInvalidateRange(addr,size);, if i capture len, what size should I set for Xil_DCacheInvalidateRange. 2. in function Xil_DCacheInvalidateRange, i see this: ... int32_t cache...