void __init probe_roms(void) { const unsigned char *rom; unsigned long start, length, upper; unsigned char c; int i; /* */ 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; video_rom_resource.start = start; if (probe_kernel_address(rom + 2, c) != 0) continue; /* */ length = c * 512; /* */ if (length && romchecksum(rom, length)) video_rom_resource.end = start + length - 1; request_resource(&iomem_resource, &video_rom_resource); break; } start = (video_rom_resource.end + 1 + 2047) & ~2047UL; if (start < upper) start = upper; /* */ request_resource(&iomem_resource, &system_rom_resource); upper = system_rom_resource.start; /* */ rom = isa_bus_to_virt(extension_rom_resource.start); if (romsignature(rom)) { length = resource_size(&extension_rom_resource); if (romchecksum(rom, length)) { request_resource(&iomem_resource, &extension_rom_resource); upper = extension_rom_resource.start; } } /* */ for (i = 0; i < ARRAY_SIZE(adapter_rom_resources) && start < upper; start += 2048) { rom = isa_bus_to_virt(start); if (!romsignature(rom)) continue; if (probe_kernel_address(rom + 2, c) != 0) continue; /* */ length = c * 512; /* */ if (!length || start + length > upper || !romchecksum(rom, length)) continue; adapter_rom_resources[i].start = start; adapter_rom_resources[i].end = start + length - 1; request_resource(&iomem_resource, &adapter_rom_resources[i]); start = adapter_rom_resources[i++].end & ~2047UL; } }
static void __init probe_roms(void) { unsigned long start, length, upper; unsigned char *rom; int i; /* 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; video_rom_resource.start = start; /* 0 < length <= 0x7f * 512, historically */ length = rom[2] * 512; /* if checksum okay, trust length byte */ if (length && romchecksum(rom, length)) video_rom_resource.end = start + length - 1; request_resource(&iomem_resource, &video_rom_resource); break; } start = (video_rom_resource.end + 1 + 2047) & ~2047UL; if (start < upper) start = upper; /* system rom */ request_resource(&iomem_resource, &system_rom_resource); upper = system_rom_resource.start; /* 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; } } /* check for adapter roms on 2k boundaries */ for (i = 0; i < ADAPTER_ROM_RESOURCES && start < upper; start += 2048) { rom = isa_bus_to_virt(start); if (!romsignature(rom)) continue; /* 0 < length <= 0x7f * 512, historically */ length = rom[2] * 512; /* but accept any length that fits if checksum okay */ if (!length || start + length > upper || !romchecksum(rom, length)) continue; adapter_rom_resources[i].start = start; adapter_rom_resources[i].end = start + length - 1; request_resource(&iomem_resource, &adapter_rom_resources[i]); start = adapter_rom_resources[i++].end & ~2047UL; } }