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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 424 | giacomo | 1 | /* |
| 2 | * include/asm-i386/mach-default/mach_resources.h |
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| 3 | * |
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| 4 | * Machine specific resource allocation for generic. |
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| 5 | * Split out from setup.c by Osamu Tomita <tomita@cinet.co.jp> |
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| 6 | */ |
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| 7 | #ifndef _MACH_RESOURCES_H |
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| 8 | #define _MACH_RESOURCES_H |
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| 9 | |||
| 10 | struct resource standard_io_resources[] = { |
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| 11 | { "dma1", 0x00, 0x1f, IORESOURCE_BUSY }, |
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| 12 | { "pic1", 0x20, 0x21, IORESOURCE_BUSY }, |
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| 13 | { "timer", 0x40, 0x5f, IORESOURCE_BUSY }, |
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| 14 | { "keyboard", 0x60, 0x6f, IORESOURCE_BUSY }, |
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| 15 | { "dma page reg", 0x80, 0x8f, IORESOURCE_BUSY }, |
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| 16 | { "pic2", 0xa0, 0xa1, IORESOURCE_BUSY }, |
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| 17 | { "dma2", 0xc0, 0xdf, IORESOURCE_BUSY }, |
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| 18 | { "fpu", 0xf0, 0xff, IORESOURCE_BUSY } |
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| 19 | }; |
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| 20 | |||
| 21 | #define STANDARD_IO_RESOURCES (sizeof(standard_io_resources)/sizeof(struct resource)) |
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| 22 | |||
| 23 | static struct resource vram_resource = { "Video RAM area", 0xa0000, 0xbffff, IORESOURCE_BUSY }; |
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| 24 | |||
| 25 | /* System ROM resources */ |
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| 26 | #define MAXROMS 6 |
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| 27 | static struct resource rom_resources[MAXROMS] = { |
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| 28 | { "System ROM", 0xF0000, 0xFFFFF, IORESOURCE_BUSY }, |
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| 29 | { "Video ROM", 0xc0000, 0xc7fff, IORESOURCE_BUSY } |
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| 30 | }; |
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| 31 | |||
| 32 | #define romsignature(x) (*(unsigned short *)(x) == 0xaa55) |
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| 33 | |||
| 34 | static inline void probe_video_rom(int roms) |
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| 35 | { |
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| 36 | unsigned long base; |
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| 37 | unsigned char *romstart; |
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| 38 | |||
| 39 | |||
| 40 | /* Video ROM is standard at C000:0000 - C7FF:0000, check signature */ |
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| 41 | for (base = 0xC0000; base < 0xE0000; base += 2048) { |
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| 42 | romstart = isa_bus_to_virt(base); |
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| 43 | if (!romsignature(romstart)) |
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| 44 | continue; |
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| 45 | request_resource(&iomem_resource, rom_resources + roms); |
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| 46 | roms++; |
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| 47 | break; |
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| 48 | } |
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| 49 | } |
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| 50 | |||
| 51 | static inline void probe_extension_roms(int roms) |
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| 52 | { |
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| 53 | unsigned long base; |
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| 54 | unsigned char *romstart; |
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| 55 | |||
| 56 | /* Extension roms at C800:0000 - DFFF:0000 */ |
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| 57 | for (base = 0xC8000; base < 0xE0000; base += 2048) { |
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| 58 | unsigned long length; |
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| 59 | |||
| 60 | romstart = isa_bus_to_virt(base); |
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| 61 | if (!romsignature(romstart)) |
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| 62 | continue; |
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| 63 | length = romstart[2] * 512; |
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| 64 | if (length) { |
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| 65 | unsigned int i; |
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| 66 | unsigned char chksum; |
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| 67 | |||
| 68 | chksum = 0; |
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| 69 | for (i = 0; i < length; i++) |
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| 70 | chksum += romstart[i]; |
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| 71 | |||
| 72 | /* Good checksum? */ |
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| 73 | if (!chksum) { |
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| 74 | rom_resources[roms].start = base; |
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| 75 | rom_resources[roms].end = base + length - 1; |
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| 76 | rom_resources[roms].name = "Extension ROM"; |
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| 77 | rom_resources[roms].flags = IORESOURCE_BUSY; |
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| 78 | |||
| 79 | request_resource(&iomem_resource, rom_resources + roms); |
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| 80 | roms++; |
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| 81 | if (roms >= MAXROMS) |
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| 82 | return; |
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| 83 | } |
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| 84 | } |
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| 85 | } |
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| 86 | |||
| 87 | /* Final check for motherboard extension rom at E000:0000 */ |
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| 88 | base = 0xE0000; |
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| 89 | romstart = isa_bus_to_virt(base); |
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| 90 | |||
| 91 | if (romsignature(romstart)) { |
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| 92 | rom_resources[roms].start = base; |
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| 93 | rom_resources[roms].end = base + 65535; |
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| 94 | rom_resources[roms].name = "Extension ROM"; |
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| 95 | rom_resources[roms].flags = IORESOURCE_BUSY; |
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| 96 | |||
| 97 | request_resource(&iomem_resource, rom_resources + roms); |
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| 98 | } |
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| 99 | } |
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| 100 | |||
| 101 | static inline void request_graphics_resource(void) |
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| 102 | { |
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| 103 | request_resource(&iomem_resource, &vram_resource); |
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| 104 | } |
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| 105 | |||
| 106 | #endif /* !_MACH_RESOURCES_H */ |