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yaml --- r: 99870 b: refs/heads/master c: a9c1182 h: refs/heads/master v: v3
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Yinghai Lu
authored and
Ingo Molnar
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Jul 8, 2008
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 7a1fd9866cbb59a00006f1e0fd5726951b167c97 | ||
| refs/heads/master: a9c1182fbd349882fe912245d6e03cd30943be2d |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,166 @@ | ||
| #include <linux/sched.h> | ||
| #include <linux/mm.h> | ||
| #include <linux/uaccess.h> | ||
| #include <linux/mmzone.h> | ||
| #include <linux/ioport.h> | ||
| #include <linux/seq_file.h> | ||
| #include <linux/console.h> | ||
| #include <linux/init.h> | ||
| #include <linux/edd.h> | ||
| #include <linux/dmi.h> | ||
| #include <linux/pfn.h> | ||
| #include <linux/pci.h> | ||
| #include <asm/pci-direct.h> | ||
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| #include <asm/e820.h> | ||
| #include <asm/mmzone.h> | ||
| #include <asm/setup.h> | ||
| #include <asm/sections.h> | ||
| #include <asm/io.h> | ||
| #include <setup_arch.h> | ||
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| static struct resource system_rom_resource = { | ||
| .name = "System ROM", | ||
| .start = 0xf0000, | ||
| .end = 0xfffff, | ||
| .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | ||
| }; | ||
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| static struct resource extension_rom_resource = { | ||
| .name = "Extension ROM", | ||
| .start = 0xe0000, | ||
| .end = 0xeffff, | ||
| .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | ||
| }; | ||
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| static struct resource adapter_rom_resources[] = { { | ||
| .name = "Adapter ROM", | ||
| .start = 0xc8000, | ||
| .end = 0, | ||
| .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | ||
| }, { | ||
| .name = "Adapter ROM", | ||
| .start = 0, | ||
| .end = 0, | ||
| .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | ||
| }, { | ||
| .name = "Adapter ROM", | ||
| .start = 0, | ||
| .end = 0, | ||
| .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | ||
| }, { | ||
| .name = "Adapter ROM", | ||
| .start = 0, | ||
| .end = 0, | ||
| .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | ||
| }, { | ||
| .name = "Adapter ROM", | ||
| .start = 0, | ||
| .end = 0, | ||
| .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | ||
| }, { | ||
| .name = "Adapter ROM", | ||
| .start = 0, | ||
| .end = 0, | ||
| .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | ||
| } }; | ||
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| static struct resource video_rom_resource = { | ||
| .name = "Video ROM", | ||
| .start = 0xc0000, | ||
| .end = 0xc7fff, | ||
| .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM | ||
| }; | ||
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| #define ROMSIGNATURE 0xaa55 | ||
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| static int __init romsignature(const unsigned char *rom) | ||
| { | ||
| const unsigned short * const ptr = (const unsigned short *)rom; | ||
| unsigned short sig; | ||
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| return probe_kernel_address(ptr, sig) == 0 && sig == ROMSIGNATURE; | ||
| } | ||
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| static int __init romchecksum(const unsigned char *rom, unsigned long length) | ||
| { | ||
| unsigned char sum, c; | ||
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| for (sum = 0; length && probe_kernel_address(rom++, c) == 0; length--) | ||
| sum += c; | ||
| return !length && !sum; | ||
| } | ||
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| void __init probe_roms(void) | ||
| { | ||
| const unsigned char *rom; | ||
| unsigned long start, length, upper; | ||
| unsigned char c; | ||
| int i; | ||
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| /* video rom */ | ||
| upper = adapter_rom_resources[0].start; | ||
| for (start = video_rom_resource.start; start < upper; start += 2048) { | ||
| rom = isa_bus_to_virt(start); | ||
| if (!romsignature(rom)) | ||
| continue; | ||
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| video_rom_resource.start = start; | ||
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| if (probe_kernel_address(rom + 2, c) != 0) | ||
| continue; | ||
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| /* 0 < length <= 0x7f * 512, historically */ | ||
| length = c * 512; | ||
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| /* if checksum okay, trust length byte */ | ||
| if (length && romchecksum(rom, length)) | ||
| video_rom_resource.end = start + length - 1; | ||
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| request_resource(&iomem_resource, &video_rom_resource); | ||
| break; | ||
| } | ||
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| start = (video_rom_resource.end + 1 + 2047) & ~2047UL; | ||
| if (start < upper) | ||
| start = upper; | ||
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| /* system rom */ | ||
| request_resource(&iomem_resource, &system_rom_resource); | ||
| upper = system_rom_resource.start; | ||
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| /* check for extension rom (ignore length byte!) */ | ||
| rom = isa_bus_to_virt(extension_rom_resource.start); | ||
| if (romsignature(rom)) { | ||
| length = extension_rom_resource.end - extension_rom_resource.start + 1; | ||
| if (romchecksum(rom, length)) { | ||
| request_resource(&iomem_resource, &extension_rom_resource); | ||
| upper = extension_rom_resource.start; | ||
| } | ||
| } | ||
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| /* check for adapter roms on 2k boundaries */ | ||
| for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) { | ||
| rom = isa_bus_to_virt(start); | ||
| if (!romsignature(rom)) | ||
| continue; | ||
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| if (probe_kernel_address(rom + 2, c) != 0) | ||
| continue; | ||
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| /* 0 < length <= 0x7f * 512, historically */ | ||
| length = c * 512; | ||
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| /* but accept any length that fits if checksum okay */ | ||
| if (!length || start + length > upper || !romchecksum(rom, length)) | ||
| continue; | ||
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| adapter_rom_resources[i].start = start; | ||
| adapter_rom_resources[i].end = start + length - 1; | ||
| request_resource(&iomem_resource, &adapter_rom_resources[i]); | ||
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| start = adapter_rom_resources[i++].end & ~2047UL; | ||
| } | ||
| } | ||
|
|
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