| 标题 | 阅读 | 评论 | 转发 | 发布日期 | |
|---|---|---|---|---|---|
| how to avoid "Symbolic link to SVN-controlled source file | 1218 | 1 | 0 | 2012-11-05 | |
| 非root权限访问/dev/ttyUSB* | 2086 | 0 | 0 | 2012-11-02 | |
| GREGORY的品牌背景以及2011年的产品系列介绍 | 6444 | 0 | 0 | 2012-10-27 | |
| Linux Device和Driver注册过程，以及Probe的时机 | 1181 | 0 | 0 | 2012-08-06 | |
| ubuntu与windows双系统启动顺序更改 | 814 | 0 | 0 | 2012-07-16 | |
| France visa | 501 | 0 | 0 | 2012-03-26 | |
| many kinds of cheese | 775 | 0 | 0 | 2012-02-15 | |
| 读写信号量(2.6.23内核，i386) | 801 | 0 | 0 | 2012-01-11 | |
| about adb permission | 594 | 0 | 0 | 2012-01-09 | |
| linux zip 加密 | 723 | 0 | 0 | 2011-12-28 | |
| dma | 959 | 0 | 0 | 2011-12-27 | |
| 界面打开文件夹 | 834 | 0 | 0 | 2011-12-27 | |
| windos exchange Caps Lock, Ctrl | 680 | 0 | 0 | 2011-12-20 | |
| 删除window linux 双系统，启动选择 | 1013 | 0 | 0 | 2011-12-20 | |
| cygwin source | 718 | 0 | 0 | 2011-12-20 | |
| 【推荐】 INIT_WORK的理解 | 4405 | 1 | 1 | 2011-12-07 | |
| 【推荐】 GREP --color | 1965 | 0 | 0 | 2011-12-01 | |
| linux cmd--ps | 690 | 0 | 0 | 2011-11-16 | |
| android adb by wifi | 982 | 0 | 0 | 2011-11-11 | |
| what's signed-off-by | 739 | 0 | 0 | 2011-10-28 |
config20102009-11-19 20:15
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
