{"id":1094,"date":"2016-05-11T14:25:58","date_gmt":"2016-05-11T06:25:58","guid":{"rendered":"http:\/\/www.kumouse.com\/?p=1094"},"modified":"2016-05-11T14:29:27","modified_gmt":"2016-05-11T06:29:27","slug":"arqca-spi-%e5%90%af%e5%8a%a8%e5%8e%9f%e7%90%86%e5%92%8c-art-%e5%9c%b0%e5%9d%80%e5%ae%9a%e4%bd%8d%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.kumouse.com\/?p=1094","title":{"rendered":"AR\/QCA SPI \u542f\u52a8\u539f\u7406\u548c ART \u5730\u5740\u5b9a\u4f4d\u539f\u7406"},"content":{"rendered":"<p>\u672c\u8d34\u4e3b\u8981\u8bb2\u89e3 Bootloader \u662f\u5982\u4f55\u5728\u4f7f\u7528 SPI Flash \u7684 AR\/QCA \u7684\u82af\u7247\u4e0a\u542f\u52a8\u7684\uff0c\u4ee5\u53ca OpenWrt \u4ee3\u7801 ar71xx \u7684 mach \u6587\u4ef6\u4e2d\u7c7b\u4f3c\u4e8e u8 *art = KSEG1ADDR(0x1fff0000) \u4e2d 0x1fff0000 \u662f\u5982\u4f55\u5f97\u6765\u7684\u3002<br \/>\n\u697c\u4e3b\u4e4b\u524d\u5728 U-Boot \u7f16\u8bd1\u6559\u7a0b\u4e2d\u8fdb\u884c\u8fc7\u7b80\u5355\u7684\u63cf\u8ff0\uff0c\u4f46\u662f\u56e0\u4e3a\u5b9e\u5728\u662f\u592a\u7b80\u7565\u4e86\uff0c\u6240\u4ee5\u6253\u7b97\u5199\u4e00\u4e2a\u8be6\u7ec6\u7248\u7684\u3002<\/p>\n<p>\u4e0b\u9762\u697c\u4e3b\u5c06\u6309\u7167\u5fc5\u8981\u7684\u987a\u5e8f\u4f9d\u6b21\u8bb2\u89e3\u3002<\/p>\n<p><strong><span style=\"font-size: x-large;\">1. CPU \u5730\u5740\u3001\u603b\u7ebf\u5730\u5740\u3001\u6620\u5c04<\/span><\/strong><\/p>\n<p>\u5bf9\u4e8e MIPS CPU \u6765\u8bf4\uff0c\u53ea\u6709\u4e00\u79cd\u5730\u5740\uff0c\u5373 CPU \u5730\u5740\u300232 \u4f4d CPU \u7684\u5bfb\u5740\u8303\u56f4\u79f0\u4e3a\u5b83\u7684\u5730\u5740\u7a7a\u95f4\uff0c\u4e5f\u5c31\u662f 4GB\uff0c\u4ece 0x00000000 \u5230 0xffffffff\u3002<br \/>\n\u800c\u603b\u7ebf\uff0c\u5219\u662f\u7528\u6765\u8fde\u63a5\u5916\u8bbe\u7684\uff0c\u5916\u8bbe\u7684\u5bc4\u5b58\u5668\u3001RAM\u3001ROM\u7b49\uff0c\u90fd\u8981\u901a\u8fc7\u603b\u7ebf\u6765\u8bbf\u95ee\u3002\u603b\u7ebf\u4e5f\u6709\u81ea\u5df1\u7684\u5730\u5740\u7a7a\u95f4\u3002<\/p>\n<p>CPU \u5730\u5740\u8ddf\u603b\u7ebf\u5730\u5740\u662f\u76f8\u4e92\u72ec\u7acb\u7684\u3002\u56e0\u6b64\uff0c\u8981\u8ba9 CPU \u80fd\u591f\u8bbf\u95ee\u5230\u5916\u8bbe\uff0c\u5c31\u5fc5\u987b\u8981\u8ba9 CPU \u5730\u5740\u8ddf\u603b\u7ebf\u5730\u5740\u4ea7\u751f\u67d0\u79cd\u5173\u8054\uff0c\u8fd9\u5c31\u662f\u6620\u5c04\u3002<br \/>\n\u8fd9\u5c31\u597d\u6bd4\u6570\u5b66\u91cc\u9762\u7684\u6620\u5c04\u3002MIPS CPU \u4e0a\u7684\u6620\u5c04\u662f\u4ece CPU \u4e0a\u4e00\u6bb5\u5730\u5740\u7a7a\u95f4\u5230\u603b\u7ebf\u4e0a\u4e00\u6bb5\u5730\u5740\u7a7a\u95f4\u7684\u4e00\u4e00\u6620\u5c04\u3002<\/p>\n<p>\u6709\u4e86\u8fd9\u6837\u7684\u5173\u8054\u540e\uff0c\u5c31\u5f88\u5bb9\u6613\u901a\u8fc7\u5bf9 CPU \u5730\u5740\u7684\u64cd\u4f5c\u6765\u53d8\u6210\u5bf9\u603b\u7ebf\u4e0a\u5916\u8bbe\u7684\u64cd\u4f5c\u4e86\u3002<\/p>\n<p><span style=\"font-size: x-large;\"><strong>2. AR\/QCA \u7684\u603b\u7ebf\u5730\u5740\u5e03\u5c40<\/strong><\/span><\/p>\n<p>\u4ee5 AR9344 \u4e3a\u4f8b\uff0c\u5982\u56fe\uff1a<a href=\"http:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/ar9344_1.png\" rel=\"attachment wp-att-1098\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1098 alignleft\" src=\"http:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/ar9344_1-300x181.png\" alt=\"ar9344_1\" width=\"300\" height=\"181\" srcset=\"https:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/ar9344_1-300x181.png 300w, https:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/ar9344_1.png 694w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u53ef\u4ee5\u770b\u5230 AR\/QCA \u7684 CPU \u4f7f\u7528\u4e86\u603b\u7ebf\u5730\u5740\u7684 0x00000000 ~ 0x1fffffff \u5171 512MB \u7684\u5730\u5740\u7a7a\u95f4\u3002<br \/>\n\u6ce8\u610f\u5230\u5185\u5b58\u4e5f\u662f\u901a\u8fc7\u603b\u7ebf\u6765\u8bbf\u95ee\u7684\u3002\u7531\u56fe\u53ef\u77e5 AR\/QCA \u53ea\u6709\u6700\u5927 256MB \u7684\u5185\u5b58\u5bfb\u5740\u80fd\u529b\u3002<\/p>\n<p><strong><span style=\"font-size: x-large;\">3. MIPS \u7684\u5185\u5b58\u5e03\u5c40<\/span><\/strong><\/p>\n<p>MIPS32 (\u5373 32 \u4f4d) \u7684\u5185\u5b58\u6a21\u578b\u90fd\u662f\u4e00\u81f4\u7684\uff0c\u5982\u56fe\uff1a<br \/>\n<a href=\"http:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/addrspace_1.png\" rel=\"attachment wp-att-1099\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1099 alignleft\" src=\"http:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/addrspace_1-300x270.png\" alt=\"addrspace_1\" width=\"300\" height=\"270\" srcset=\"https:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/addrspace_1-300x270.png 300w, https:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/addrspace_1.png 747w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>(\u56fe\u7247\u6765\u81ea MIPS32 74K Processor Core Family Software User\u2019s Manual)<\/p>\n<p>\u7531\u4e8e Bootloader \u8ddf Linux \u5185\u6838\u90fd\u8fd0\u884c\u5728 Kernel Mode \u4e0b\uff0c\u6240\u4ee5\u8fd9\u91cc\u4e5f\u53ea\u5c31 Kernel Mode \u8fdb\u884c\u8ba8\u8bba\u3002<\/p>\n<p>\u7531\u56fe\u53ef\u4ee5\u770b\u5230\uff0cKernel Mode \u4e0b\uff0cCPU \u7684\u5730\u5740\u7a7a\u95f4\u88ab\u5206\u4e3a\u4e865\u6bb5\uff1a kuseg kseg0 kseg1 kseg2 kseg3\u3002<br \/>\nkuseg \u7a7a\u95f4\u4e3a 2GB\uff0c\u662f\u7528\u4e8e\u7528\u6237\u6001\u7a0b\u5e8f\u8bbf\u95ee\u7528\u7684\uff0ckseg2 kseg3 \u662f\u7528\u4f5c\u5185\u6838\u7684\u5185\u5b58\u5206\u9875\u7528\u7684\u3002<br \/>\n\u8fd9\u91cc\u53ea\u91cd\u70b9\u8ba8\u8bba kseg0 \u548c kseg1\u3002kseg0 \u548c kseg1 \u90fd\u5360\u7528 512MB \u7684\u5730\u5740\u7a7a\u95f4\u3002<\/p>\n<p>\u7531 MIPS \u624b\u518c\u53ef\u77e5\uff0ckseg0 \u548c kseg1 \u90fd\u6620\u5c04\u5230\u4e86\u603b\u7ebf\u5730\u5740\u4e0a\u7684\u76f8\u540c\u533a\u57df\uff0c\u4e5f\u5c31\u662f\u603b\u7ebf\u5730\u5740\u7684 0x00000000 ~ 0x1fffffff \u5171 512MB \u7684\u7a7a\u95f4\u3002<br \/>\n\u8fd9\u4e2a\u6620\u5c04\u662f\u56fa\u5b9a\u6620\u5c04\uff0c\u4e5f\u5c31\u662f\u4e0d\u4f1a\u7ecf\u8fc7 MMU \u7684\u8f6c\u6362\uff0c\u8bbf\u95ee kseg0 \u8ddf kseg1 \u90fd\u4f1a\u76f4\u63a5\u88ab\u6620\u5c04\u5230\u603b\u7ebf\u4e0a 0x00000000 ~ 0x1fffffff \u7684\u5bf9\u5e94\u4f4d\u7f6e\u3002<\/p>\n<p>\u7531\u4e8e AR\/QCA \u4f7f\u7528\u7684\u603b\u7ebf\u5730\u5740\u7a7a\u95f4\u4e5f\u662f\u8fd9\u4e2a\u8303\u56f4\uff0c\u56e0\u6b64\u901a\u8fc7 kseg0 \u6216 kseg1 \u5c31\u90fd\u80fd\u8bbf\u95ee\u5230\u6574\u4e2a\u603b\u7ebf\u5730\u5740\u7a7a\u95f4\u3002<br \/>\n\u5982\u56fe\uff1a<br \/>\n<a href=\"http:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/map_1.png\" rel=\"attachment wp-att-1100\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1100 alignleft\" src=\"http:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/map_1-281x300.png\" alt=\"map_1\" width=\"281\" height=\"300\" srcset=\"https:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/map_1-281x300.png 281w, https:\/\/www.kumouse.com\/wp-content\/uploads\/2016\/05\/map_1.png 705w\" sizes=\"auto, (max-width: 281px) 100vw, 281px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u4ece\u8fd9\u91cc\u53ef\u4ee5\u770b\u5230\uff0ckseg0 \u7684\u8303\u56f4\u662f 0x80000000 ~0x9fffffff\uff0ckseg1 \u7684\u8303\u56f4\u662f 0xa0000000 ~ 0xbfffffff\u3002<br \/>\n\u53c8\uff0c\u603b\u7ebf\u5730\u5740\u7a7a\u95f4\u8303\u56f4\u662f 0x00000000 ~ 0x1fffffff\uff0c\u90a3\u4e48\uff1a<\/p>\n<p>1. \u4ece\u603b\u7ebf\u5730\u5740\u6620\u5c04\u5230 kseg0 \u7684\u65b9\u6cd5\u662f\uff1a\u5728\u4fdd\u8bc1\u603b\u7ebf\u5730\u5740\u6709\u6548 (\u5373\u603b\u7ebf\u5730\u5740\u5728 0x00000000 ~ 0x1fffffff \u5185) \u7684\u60c5\u51b5\u4e0b\uff0c\u5c06\u603b\u7ebf\u5730\u5740\u52a0\u4e0a kseg0 \u7684\u8d77\u59cb\u5730\u5740\uff0c\u5373\uff1a<br \/>\nkseg0(addr) = 0x80000000 + addr<br \/>\n2. \u4ece\u603b\u7ebf\u5730\u5740\u6620\u5c04\u5230 kseg1 \u7684\u65b9\u6cd5\u4e0e\u4ece\u603b\u7ebf\u5730\u5740\u6620\u5c04\u5230 kseg0 \u7684\u65b9\u6cd5\u7c7b\u4f3c\uff0c\u5373\uff1a<br \/>\nkseg1(addr) = 0xa0000000 + addr<br \/>\n3. \u4ece kseg0 \u548c kseg1 \u6620\u5c04\u5230\u603b\u7ebf\u7684\u65b9\u6cd5\u662f\uff1a\u5c06 CPU \u5730\u5740\u9664\u4ee5 kseg0 \u6216 kseg1 \u6bb5\u957f\u5ea6\uff0c\u53d6\u4f59\uff0c\u5f97\u5230\u7684\u5c31\u662f\u603b\u7ebf\u5730\u5740\uff0c\u5373\uff1a<br \/>\nbus(addr) = addr % 0x20000000<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0c\u5728 Linux \u5185\u6838\u4e2d\uff0carch\/mips\/include\/asm\/addrspace.h \u63d0\u4f9b\u4e86\u76f8\u5e94\u7684\u5b8f\u6765\u8fdb\u884c\u4e0a\u8ff0\u7684\u5730\u5740\u8f6c\u6362\uff0c\u7b80\u5316\u540e\u5982\u4e0b\uff1a<\/p>\n<p>#define virt_to_bus(_virt) ((_virt) &amp; 0x1fffffff)<br \/>\n#define KSEG0ADDR(_addr) ((_addr &amp; 0x1fffffff) | 0x80000000)<br \/>\n#define KSEG1ADDR(_addr) ((_addr &amp; 0x1fffffff) | 0xa0000000)<br \/>\nvirt_to_bus \u5373\u4e3a\u603b CPU \u5730\u5740\u8f6c\u6362\u5230\u603b\u7ebf\u5730\u5740\uff0c \u4e0e 0x1fffffff (\u5373\u4f4e 512MB \u7684\u63a9\u7801) \u8fdb\u884c\u6309\u4f4d\u4e0e\u64cd\u4f5c\uff0c\u76f8\u5f53\u4e8e\u9664\u4ee5 0x20000000 \u53d6\u4f59\uff0c\u5373\u820d\u5f03\u6389 512MB \u4e4b\u4e0a\u7684\u90e8\u5206\uff0c\u53ea\u5269\u4e0b\u4f4e 512MB \u7684\u90e8\u5206\uff1bKSEG0ADDR \u4e0e KSEG1ADDR \u90fd\u5148\u4fdd\u8bc1\u8f93\u5165\u5730\u5740\u662f\u6709\u6548\u7684\uff0c\u518d\u8fdb\u884c\u8f6c\u6362\uff0c\u8fd9\u91cc\u7684\u6309\u4f4d\u6216\u8fd0\u7b97\uff0c\u5728\u7ed3\u679c\u4e0a\u7b49\u540c\u4e8e\u52a0\u6cd5\u8fd0\u7b97<\/p>\n<p>\u867d\u7136 kseg0 \u8ddf kseg1 \u90fd\u6620\u5c04\u5728\u603b\u7ebf\u76f8\u540c\u7684\u5730\u5740\u7a7a\u95f4\u4e0a\uff0c\u4f46\u662f\uff0c\u5b83\u4eec\u7684\u4f5c\u7528\u5374\u5e76\u4e0d\u76f8\u540c\uff1a<\/p>\n<p>kseg0 \u7ecf\u8fc7\u4e86\u7f13\u5b58\uff0ckseg1 \u6ca1\u6709\u7ecf\u8fc7\u7f13\u5b58\u3002<\/p>\n<p>kseg0 \u7ecf\u8fc7\u4e86\u7f13\u5b58\uff0c\u4e5f\u5c31\u662f\u8bf4\u4ece\u8fd9\u4e2a\u6bb5\u8bfb\u53d6\u51fa\u6765\u7684\u6570\u636e\uff0c\u53ef\u80fd\u662f\u7f13\u5b58\u8fc7\u7684\uff0c\u8ddf\u603b\u7ebf\u4e0a\u5b9e\u9645\u7684\u6570\u636e\u53ef\u80fd\u4e0d\u540c\uff1b\u5411\u5176\u5199\u5165\u7684\u6570\u636e\uff0c\u53ef\u80fd\u4f1a\u88ab\u5ef6\u8fdf\u5199\u5165\u603b\u7ebf\u3002<br \/>\nkseg1 \u5219\u6ca1\u6709\u7ecf\u8fc7\u7f13\u5b58\uff0c\u5bf9\u8fd9\u4e2a\u6bb5\u7684\u4efb\u4f55\u8bfb\u5199\u64cd\u4f5c\u90fd\u5c06\u7acb\u5373\u53cd\u6620\u5728\u603b\u7ebf\u4e0a\u3002<\/p>\n<p>\u6240\u4ee5\uff1a<br \/>\nkseg0 \u4e3b\u8981\u7528\u4e8e\u9700\u8981\u52a0\u901f\u7684\u5185\u5b58\u8bbf\u95ee\u548c ROM \u8bbf\u95ee<br \/>\nkseg1 \u4e3b\u8981\u7528\u4e8e\u8bbe\u5907\u5bc4\u5b58\u5668\u7684\u8bbf\u95ee<\/p>\n<p><strong><span style=\"font-size: x-large;\">4. MIPS \u4e0a\u7684\u542f\u52a8\u5730\u5740<\/span><\/strong><\/p>\n<p>MIPS \u7684 CPU \u5728\u590d\u4f4d\u540e\uff0c\u4f1a\u4ece CPU \u5730\u5740\u7684 0xbfc00000 \u5f00\u59cb\u6267\u884c\uff0c\u4e5f\u5c31\u662f\u603b\u7ebf\u5730\u5740\u7684 0x1fc00000\u3002<br \/>\n\u53ef\u4ee5\u770b\u51fa CPU \u662f\u5728 kseg1 \u6bb5\u4e0a\u5f00\u59cb\u6267\u884c\u7684\uff0c\u8fd9\u662f\u56e0\u4e3a\u5728 CPU \u590d\u4f4d\u540e\uff0c\u7f13\u5b58\u8fd8\u6ca1\u7528\u521d\u59cb\u5316\uff0c\u53ef\u80fd\u5e76\u4e0d\u80fd\u4f7f\u7528\u3002\u5728\u4e0d\u80fd\u4fdd\u8bc1 kseg0 \u6bb5\u4e00\u5b9a\u80fd\u4f7f\u7528\u7684\u60c5\u51b5\u4e0b\uff0c\u90a3\u4e48\u80af\u5b9a\u53ea\u6709\u4ece kseg1 \u6bb5\u5f00\u59cb\u6267\u884c\u4e86\u3002<\/p>\n<p><strong><span style=\"font-size: x-large;\">5. SPI Flash \u548c\u6620\u5c04<\/span><\/strong><\/p>\n<p>\u8fd9\u91cc\u7684 SPI Flash \u7279\u6307 SPI \u63a5\u53e3\u7684 NOR Flash \uff08\u5f53\u7136\u4e5f\u6709 SPI NAND Flash\uff09\u3002<\/p>\n<p>NOR Flash \u6709\u4e2a\u7279\u70b9\uff0c\u5373\u7ed9\u51fa\u4e00\u4e2a\u786e\u5207\u7684\u5730\u5740\uff0c\u90a3\u4e48\u5b83\u5c31\u80fd\u8fde\u7eed\u8f93\u51fa\u4ece\u8fd9\u4e2a\u5730\u5740\u5f00\u59cb\u7684\u6570\u636e\u3002\u8fd9\u4e2a\u7279\u70b9\u8ddf DRAM \u7c7b\u4f3c\uff0c\u56e0\u6b64\u5b83\u53ef\u4ee5\u88ab\u7528\u4f5c\u542f\u52a8\u8bbe\u5907\u3002<br \/>\n\u8fd9\u4e2a\u7279\u6027\u88ab\u79f0\u4e3a XIP \uff08eXecute-In-Place)\u3002<\/p>\n<p>\u4e3a\u4e86\u5b9e\u73b0\u8fd9\u4e2a\u7279\u6027\uff0c\u5c31\u9700\u8981 CPU \u80fd\u591f\u901a\u8fc7 CPU \u5730\u5740\u7a7a\u95f4\u8bbf\u95ee\u5230 Flash \u4e0a\u7684\u6570\u636e\u3002<br \/>\n\u7531\u4e8e Flash \u662f\u4e00\u4e2a\u5916\u8bbe\uff0c\u56e0\u6b64\u5bf9\u5b83\u7684\u8bbf\u95ee\u662f\u901a\u8fc7\u603b\u7ebf\u6765\u8fdb\u884c\u7684\u3002<\/p>\n<p>\u8fd9\u91cc\uff0c\u53c8\u7528\u5230\u4e86\u6620\u5c04\uff1a<br \/>\nFlash \u6709\u81ea\u5df1\u7684\u5730\u5740\u7a7a\u95f4\uff0c\u5373\u5b58\u50a8\u6570\u636e\u7684\u5730\u5740\u3002<br \/>\n\u7531\u4e8e Flash \u662f\u5916\u8bbe\uff0c\u56e0\u6b64\u5b83\u7684\u5730\u5740\u7a7a\u95f4\u4f1a\u88ab\u6620\u5c04\u5728\u603b\u7ebf\u4e0a\u9762\u3002\u8fd9\u53c8\u662f\u4e00\u4e2a\u6620\u5c04\uff0c\u53ea\u4e0d\u8fc7\u662f\u4ece\u603b\u7ebf\u5230 Flash \u7684\u6620\u5c04\u3002<\/p>\n<p>\u90a3\u4e48\uff0c\u901a\u8fc7 CPU \u8bbf\u95ee Flash\uff0c\u5b9e\u9645\u4e0a\u7ecf\u8fc7\u4e86\u4e24\u6b21\u6620\u5c04\uff1a\u7b2c\u4e00\u6b21\u662f CPU \u5730\u5740\u5230\u603b\u7ebf\u5730\u5740\u7684\u6620\u5c04\uff0c\u7b2c\u4e8c\u6b21\u662f\u603b\u7ebf\u5730\u5740\u5230 Flash \u5730\u5740\u7684\u6620\u5c04\u3002<br \/>\n\u8fd9\u6837\uff0cCPU \u5c31\u80fd\u591f\u76f4\u63a5\u8bfb\u53d6 Flash \u7684\u6570\u636e\u4e86\u3002<\/p>\n<p><strong><span style=\"font-size: x-large;\">6. AR\/QCA \u7684 CPU \u5728 SPI Flash \u4e0a\u7684\u542f\u52a8<\/span><\/strong><\/p>\n<p>\u4ee5 AR9344 \u4e3a\u4f8b\uff0c\u5176\u5b83\u7684\u578b\u53f7\u4e5f\u90fd\u57fa\u672c\u76f8\u540c<\/p>\n<p>AR9344 \u9075\u5faa MIPS \u7684\u8981\u6c42\uff0cCPU \u590d\u4f4d\u540e\uff0c\u4ece 0xbfc00000 \u5f00\u59cb\u6267\u884c\u3002<\/p>\n<p>\u90a3\u4e48\uff0c\u603b\u7ebf\u5730\u5740 0x1fc00000 \u5bf9\u5e94\u4e86\u4ec0\u4e48\u5916\u8bbe\u5462\uff1f<br \/>\n\u4ece\u7b2c 2 \u8282\u53ef\u4ee5\u770b\u51fa\uff0c 0x1f000000 ~ 0x1fffffff \u5bf9\u5e94\u7684\u6b63\u662f SPI Flash\u3002<\/p>\n<p>\u4f46\u662f\uff0cFlash \u662f\u4ece 0x1f000000 \u5f00\u59cb\u6620\u5c04\u7684\uff0c\u90a3\u4e48 0x1fc00000 \u5904\u6620\u5c04\u7684\u53c8\u662f\u4ec0\u4e48\u5462\uff1f<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0cFlash \u786e\u5b9e\u662f\u4ece 0x1f000000 \u5f00\u59cb\u6620\u5c04\u7684\uff0c\u603b\u5171\u53ef\u4ee5\u6620\u5c04 16MB \u7684 Flash \u7a7a\u95f4\u3002<br \/>\n\u4e3a\u4e86\u517c\u5bb9 MIPS \u8981\u6c42\u7684 0xbfc00000 \u7684\u590d\u4f4d\u5730\u5740\uff0cAR9344 \u5728 0x1fc00000 \u5904\u53c8\u91cd\u65b0\u5bf9 Flash \u8fdb\u884c\u4e86\u4e00\u6b21\u6620\u5c04\uff0c\u6620\u5c04\u4e86 Flash \u5f00\u5934\u7684 4MB<\/p>\n<p>\u4f46\u662f\uff0c\u5982\u679c 0x1fc00000 \u5904\u6620\u5c04\u4e86 Flash\uff0c \u90a3\u4e48\u4ece 0x1f000000 \u5904\u5c31\u53ea\u80fd\u8bbf\u95ee 12MB \u7684 Flash \u7a7a\u95f4\u4e86\u3002<br \/>\n\u56e0\u6b64 AR9344 \u4e13\u95e8\u8bbe\u7f6e\u4e86\u4e00\u4e2a\u5bc4\u5b58\u5668\uff0c\u7528\u6765\u63a7\u5236\u662f\u5426\u4ece 0x1fc00000 \u5904\u91cd\u65b0\u6620\u5c04 Flash\u3002<br \/>\n\u8fd9\u6837\u7684\u8bdd\uff0c\u5f53 Bootloader \u5b8c\u6210\u4e86\u542f\u52a8\u8fc7\u7a0b\uff0c\u5c31\u53ef\u4ee5\u5173\u95ed\u5728 0x1fc00000 \u7684\u91cd\u65b0\u6620\u5c04\uff0c\u8fd9\u6837\u5c31\u80fd\u4ece 0x1f000000 \u5904\u8bbf\u95ee\u5230\u5b8c\u6574\u7684 16MB \u7684 Flash \u7a7a\u95f4\u4e86\u3002<\/p>\n<p><span style=\"font-size: x-large;\"><strong>7. \u5982\u679c Flash \u5bb9\u91cf\u5c0f\u4e8e 16MB\uff0c\u90a3\u4e48\u4f1a\u600e\u6837<\/strong><\/span><\/p>\n<p>\u4e0a\u4e00\u8282\u5df2\u7ecf\u8bf4\u4e86\uff0c\u4ece 0x1f000000 \u53ef\u4ee5\u6620\u5c04 16MB \u7684 Flash \u7a7a\u95f4\uff0c\u90a3\u4e48\u5982\u679c Flash \u5bb9\u91cf\u5c0f\u4e8e 16M\uff0c\u4f1a\u600e\u4e48\u6837\uff1f<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0cFlash \u5bf9\u4e8e\u5730\u5740\u6709\u4e2a\u56de\u7ed5\u529f\u80fd\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u7ed9\u5b9a\u7684\u5730\u5740\u8d85\u8fc7\u4e86 Flash \u7684\u5730\u5740\u8303\u56f4\uff0c\u90a3\u4e48 Flash \u4f1a\u81ea\u52a8\u8ba9\u5730\u5740\u53d8\u6210 0\uff0c\u5373\u53c8\u4ece\u5934\u5f00\u59cb\u3002<br \/>\n<strong>\u60f3\u5f53\u4e8e\u7528\u7ed9\u51fa\u7684\u5730\u5740\u9664\u4ee5 Flash \u7684\u5bb9\u91cf\u53d6\u4f59\u6570\u3002<\/strong><br \/>\n\u8fd9\u6837\u5bf9 Flash \u6765\u8bf4\uff0c\u5730\u5740\u603b\u662f\u6709\u6548\u7684\uff0c\u5bf9\u5916\u754c\u6765\u8bf4\uff0c\u5c31\u50cf\u662f Flash \u7684\u6570\u636e\u5728\u5faa\u73af\u3002<\/p>\n<p>\u4f8b\u5982\uff1a\u67d0\u4e2a Flash \u7684\u5bb9\u91cf\u662f 4MB\uff0c\u90a3\u4e48\u5b83\u7684\u5730\u5740\u8303\u56f4\u5c31\u662f 0x000000 ~ 0x3fffff\u3002<br \/>\n\u5982\u679c\u8bbf\u95ee 0x400000\uff0c\u5c31\u53d8\u6210\u4e86\u8bbf\u95ee 0x000000\uff1b\u5982\u679c\u8bbf\u95ee 0x7f0000\uff0c\u5c31\u53d8\u6210\u4e86\u8bbf\u95ee 0x3f0000\uff1b\u5982\u679c\u8bbf\u95ee 0xff0000\uff0c\u4e5f\u662f\u53d8\u6210\u4e86\u8bbf\u95ee 0x3f0000\u3002<\/p>\n<p>\u56de\u5230 AR9344 \u7684 16MB \u6620\u5c04\uff0c\u5982\u679c Flash \u5bb9\u91cf\u5c0f\u4e8e 16MB\uff0c\u90a3\u4e48\u5728\u8fd9 16MB \u4e0a\u7684\u4f53\u73b0\u5c31\u662f Flash \u6570\u636e\u91cd\u590d\u6620\u5c04\u4e86\u591a\u6b21<br \/>\n\u4f8b\u5982\uff1aFlash \u662f 8MB \u7684\uff0c\u90a3\u4e48\u5b83\u5c31\u5728 0x1f000000 \u548c 0x1f800000 \u4e0a\u5404\u6620\u5c04\u4e86\u4e00\u6b21\uff1b<br \/>\n\u5982\u679c Flash \u662f 4MB \u7684\uff0c\u90a3\u4e48\u5b83\u5c31\u5728 0x1f000000\u30010x1f400000\u30010x1f800000\u30010x1fc00000 \u4e0a\u5404\u6620\u5c04\u4e86\u4e00\u6b21\uff1b<\/p>\n<p><strong><span style=\"font-size: x-large;\">8. OpenWrt \u7684 mach \u6587\u4ef6\u4e2d\uff0cART \u6570\u636e\u5730\u5740\u7684\u6765\u5386<\/span><\/strong><\/p>\n<p>\u5728\u4e0a\u9762\u51e0\u8282\u8bf4\u6765\u8fd9\u4e48\u591a\u4e4b\u540e\uff0c\u5bf9\u4e8e\u7c7b\u4f3c\u4e8e u8 *art = KSEG1ADDR(0x1fff0000) \u8fd9\u6837\u7684\u5730\u5740\u5c31\u5e94\u8be5\u5f88\u597d\u7406\u89e3\u4e86\uff1a<\/p>\n<p>\u5047\u8bbe ART \u4f4d\u4e8e Flash \u7684\u6700\u540e 64KB\uff0c\u90a3\u4e48\u5b83\u5728 Flash \u4e2d\u7684\u5730\u5740\u5c31\u662f Flash \u5bb9\u91cf &#8211; 64KB\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<br \/>\nFlash \u662f 4MB \u7684\uff0c\u90a3\u4e48 ART \u5728 Flash \u4e2d\u7684\u8d77\u59cb\u5730\u5740\u5c31\u662f 0x400000 &#8211; 0x10000 = 0x3f0000\uff1b<br \/>\nFlash \u662f 8MB \u7684\uff0c\u90a3\u4e48 ART \u5728 Flash \u4e2d\u7684\u8d77\u59cb\u5730\u5740\u5c31\u662f 0x800000 &#8211; 0x10000 = 0x7f0000\uff1b<br \/>\nFlash \u662f 16MB \u7684\uff0c\u90a3\u4e48 ART \u5728 Flash \u4e2d\u7684\u8d77\u59cb\u5730\u5740\u5c31\u662f 0x1000000 &#8211; 0x10000 = 0xff0000\uff1b<\/p>\n<p>\u90a3\u4e48\uff0c\u8fd9\u4e2a\u5730\u5740\u5728\u603b\u4e0a\u7684\u6620\u5c04\u5c31\u662f 0x1f000000 + ART \u5730\u5740\uff0c\u5373\uff1a<br \/>\nFlash \u662f 4MB \u7684\uff0c\u90a3\u4e48 ART \u5728\u603b\u7ebf\u4e2d\u7684\u8d77\u59cb\u5730\u5740\u5c31\u662f 0x1f000000 + 0x3f0000 = 0x1f3f0000\uff1b<br \/>\nFlash \u662f 8MB \u7684\uff0c\u90a3\u4e48 ART \u5728\u603b\u7ebf\u4e2d\u7684\u8d77\u59cb\u5730\u5740\u5c31\u662f 0x1f000000 + 0x7f0000 = 0x1f7f0000\uff1b<br \/>\nFlash \u662f 16MB \u7684\uff0c\u90a3\u4e48 ART \u5728\u603b\u7ebf\u4e2d\u7684\u8d77\u59cb\u5730\u5740\u5c31\u662f 0x1f000000 + 0xff0000 = 0x1fff0000\uff1b<\/p>\n<p>\u73b0\u5728\uff0c\u5047\u8bbe OpenWrt \u5e76\u4e0d\u77e5\u9053 Flash \u7684\u5bb9\u91cf\uff1a<br \/>\n\u5982\u679c\u5728 mach \u4e2d\u4f7f\u7528 8MB Flash \u7684 ART \u5730\u5740 0x1f7f0000\uff0c\u5982\u679c Flash \u662f 16MB \u7684\uff0c\u90a3\u4e48\u901a\u8fc7 0x1f7f0000 \u5c31\u65e0\u6cd5\u83b7\u53d6\u6b63\u786e\u7684 ART \u6570\u636e\u3002<\/p>\n<p>\u90a3\u4e48\u89e3\u51b3\u65b9\u6cd5\u662f\u4ec0\u4e48\u5462\uff1a<br \/>\n\u90a3\u5c31\u662f\u5047\u8bbe Flash \u90fd\u662f 16MB \u7684\uff0c\u8fd9\u6837\u7684\u8bdd\u5c31\u4f1a\u4f7f\u7528 0x1fff0000 \u8fd9\u4e2a\u5730\u5740\u3002<br \/>\n\u5f53 Flash \u5bb9\u91cf\u5c0f\u4e8e 16MB \u65f6\uff0c\u6839\u636e\u4e0a\u4e00\u8282\u6240\u8bf4\u7684\u5730\u5740\u56de\u7ed5\u529f\u80fd\uff0c\u901a\u8fc7 0xff0000 \u8bbf\u95ee\u5230\u7684\u5c31\u662f Flash \u5b9e\u9645\u6700\u540e 64KB \u7684\u5185\u5bb9\u3002<\/p>\n<p>\u8fd9\u5c31\u662f mach \u6587\u4ef6\u4e2d\u8fd9\u4e2a\u5730\u5740\u7684\u6765\u5386\u3002<\/p>\n<p><span style=\"font-size: x-large;\"><strong>9. \u540e\u8bb0<\/strong><\/span><\/p>\n<p>\u5d4c\u5165\u5f0f\u8bbe\u5907\u5f00\u53d1\u9700\u8981\u638c\u63e1\u5f88\u591a\u7684\u77e5\u8bc6\uff0c\u5e76\u4e0d\u662f\u53ea\u4f1a\u7f16\u7a0b\u5c31\u884c\u4e86\u3002\u4f8b\u5982\u8fd8\u9700\u8981\u5b66\u4e60\u8ba1\u7b97\u673a\u7ec4\u6210\u539f\u7406\u3001\u64cd\u4f5c\u7cfb\u7edf\u539f\u7406\u7b49\u7b49\u3002<br \/>\n\u5f88\u591a\u5f00\u53d1\u8005\u5bf9\u8fd9\u4e9b\u5e76\u4e0d\u4e86\u89e3\uff0c\u56e0\u6b64\u5bf9\u4e8e\u8fd9\u4e9b\u6587\u4ef6\u90fd\u4f1a\u6709\u76f8\u5f53\u591a\u7684\u7591\u95ee\u3002<br \/>\n\u697c\u4e3b\u5c3d\u91cf\u5c06\u6587\u7ae0\u5185\u5bb9\u7b80\u5316\uff0c\u4ee5\u4f7f\u5176\u53d8\u5f97\u80fd\u591f\u5bb9\u6613\u7406\u89e3\uff0c\u5e76\u5e0c\u671b\u80fd\u591f\u8d77\u5230\u629b\u7816\u5f15\u7389\u7684\u4f5c\u7528\u3002<br \/>\n\u5e0c\u671b\u901a\u8fc7\u6b64\u6587\u8ba9\u5f00\u53d1\u8005\u80fd\u8fc7\u5bf9\u5d4c\u5165\u5f0f\u8bbe\u5907\u5f00\u53d1\u6709\u66f4\u6df1\u5165\u7684\u4e86\u89e3\uff0c\u6d88\u9664\u7591\u60d1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u8d34\u4e3b\u8981\u8bb2\u89e3 Bootloader \u662f\u5982\u4f55\u5728\u4f7f\u7528 SPI Flash \u7684 AR\/QCA \u7684\u82af\u7247\u4e0a\u542f\u52a8\u7684\uff0c\u4ee5\u53ca  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1098,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-1094","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-13"],"_links":{"self":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts\/1094","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1094"}],"version-history":[{"count":4,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts\/1094\/revisions"}],"predecessor-version":[{"id":1101,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts\/1094\/revisions\/1101"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/media\/1098"}],"wp:attachment":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}