| 标题 | 阅读 | 评论 | 转发 | 发布日期 | |
|---|---|---|---|---|---|
| fcntl | 865 | 0 | 0 | 2011-10-25 | |
| Linux错误号(errno)对应错误一览 | 1385 | 0 | 0 | 2011-10-24 | |
| property_get and property_set | 863 | 0 | 0 | 2011-09-16 | |
| linux kernel !! usage | 559 | 0 | 0 | 2011-09-02 | |
| list_for_each_entry | 690 | 0 | 0 | 2011-08-26 | |
| linux2.6中的原子 | 541 | 0 | 0 | 2011-08-24 | |
| Linux内核中通知块操作 | 548 | 0 | 0 | 2011-08-23 | |
| change Caps Lock to ctrl | 658 | 0 | 0 | 2011-08-15 | |
| module_param | 596 | 0 | 0 | 2011-08-06 | |
| vmlinux, zImage, Image的区别 | 830 | 0 | 0 | 2011-07-21 | |
| kernel config | 868 | 0 | 0 | 2011-07-21 | |
| trace32 | 1213 | 0 | 0 | 2011-07-20 | |
| Linux内核中的jiffies | 698 | 0 | 0 | 2011-07-06 | |
| nvidia driveir 173 version bug in ubuntu 11.04 | 810 | 0 | 0 | 2011-07-04 | |
| 如何查看ubuntu版本号 | 797 | 0 | 0 | 2011-06-29 | |
| 【推荐】 在终端输出彩色字体 | 810 | 0 | 0 | 2011-06-23 | |
| emacs ecb cedit | 903 | 0 | 0 | 2011-06-14 | |
| 用awk去除C语言的注释 | 1452 | 0 | 0 | 2011-06-14 | |
| container_of | 728 | 0 | 0 | 2011-06-14 | |
| drvier and devices register | 704 | 0 | 0 | 2011-06-01 |
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
