C++ (Cpp) ddr3_write示例

示例#1

文件： dram.c 项目： soaph/NEMU_2015

void dram_write(hwaddr_t addr, size_t len, uint32_t data) {
	uint32_t offset = addr & BURST_MASK;
	uint8_t temp[2 * BURST_LEN];
	uint8_t mask[2 * BURST_LEN];
	memset(mask, 0, 2 * BURST_LEN);

	*(uint32_t *)(temp + offset) = data;
	memset(mask + offset, 1, len);

	ddr3_write(addr, temp, mask);

	if(offset + len > BURST_LEN) {
		/* data cross the burst boundary */
		ddr3_write(addr + BURST_LEN, temp + BURST_LEN, mask + BURST_LEN);
	}
}

示例#2

文件： dram.c 项目： snlia/programming-assignment

void dram_write(hwaddr_t addr, size_t len, uint32_t data) {
#ifdef O1
    switch (len) {
        case 1 : unalign_rw (hw_mem + addr, 1) = data; break;
        case 2 : unalign_rw (hw_mem + addr, 2) = data; break;
        case 4 : unalign_rw (hw_mem + addr, 4) = data;
    }
#else
	uint32_t offset = addr & BURST_MASK;
	uint8_t temp[2 * BURST_LEN];
	uint8_t mask[2 * BURST_LEN];
	memset(mask, 0, 2 * BURST_LEN);

	*(uint32_t *)(temp + offset) = data;
	memset(mask + offset, 1, len);

	ddr3_write(addr, temp, mask);

	if(offset + len > BURST_LEN) {
		/* data cross the burst boundary */
		ddr3_write(addr + BURST_LEN, temp + BURST_LEN, mask + BURST_LEN);
	}
#endif
}