标题 | 阅读 | 评论 | 转发 | 发布日期 | |
---|---|---|---|---|---|
2. nand初始化 | 3984 | 0 | 2 | 2009-11-19 | |
uboot浅析 - start_armboot | 4750 | 0 | 3 | 2009-11-18 | |
1. gd_t && bd_t | 1946 | 0 | 1 | 2009-11-18 | |
7. dram_init | 2222 | 0 | 1 | 2009-11-18 | |
6. display_banner && print_cpuinfo | 1966 | 0 | 1 | 2009-11-18 | |
6. console_init_f | 1341 | 0 | 0 | 2009-11-18 | |
5. serial_init | 2651 | 0 | 0 | 2009-11-18 | |
4. init_baudrate | 1124 | 0 | 0 | 2009-11-18 | |
3. env_init | 2861 | 0 | 0 | 2009-11-18 | |
2. interrupt_init | 1979 | 0 | 1 | 2009-11-18 | |
1. board_init | 2795 | 0 | 2 | 2009-11-18 | |
uboot 初始化循环体 | 2236 | 0 | 1 | 2009-11-18 | |
initrd | 1260 | 0 | 0 | 2009-11-10 | |
最近的一些计划 | 1187 | 0 | 0 | 2009-11-03 |
config20102009-11-19 19:42
外设fpga做的8k的memory,用arm9去读写它,在linux2.6系统下;这样做对吗?
实际地址映射到虚拟内存中,用得到的虚拟地址去读写。
地址总线:a1-a14 数据总线:d0-d15
#define FPGA_BASE_ADDR (0x18000000)//片选为nGCS3
#define BWSCON (0x48000000)
#define BANKCON3 (0x48000010)
#define IP_SIZE (0x1FFF)//13根地址线8K的物理空间
static void *bwscon,*bankcon3,*fpga_base_addr;
bwscon = ioremap_nocache(BWSCON,0x0000004);
bankcon3 = ioremap_nocache(BANKCON3,0x0000004);
fpga_base_addr = ioremap_nocache(FPGA_BASE_ADDR,IP_SIZE);
writel(readl(bwscon)|0xD000,bwscon);
writel(0x7FFC,bankcon3);
for(i=0;i