| 标题 | 阅读 | 评论 | 转发 | 发布日期 | |
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| 中断和中断处理程序 | 1565 | 0 | 0 | 2010-05-05 | |
| socketpair | 827 | 0 | 1 | 2010-04-30 | |
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| 主次设备号 | 606 | 0 | 0 | 2010-04-29 | |
| umask | 803 | 0 | 0 | 2010-04-28 | |
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| __builtin_constant_p | 812 | 0 | 0 | 2010-01-08 |
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
