1 // SPDX-License-Identifier: GPL-2.0
17 #include <asm/pci-direct.h>
27 	.name	= "System ROM",
34 	.name	= "Extension ROM",
41 	.name 	= "Adapter ROM",
46 	.name 	= "Adapter ROM",
51 	.name 	= "Adapter ROM",
56 	.name 	= "Adapter ROM",
61 	.name 	= "Adapter ROM",
66 	.name 	= "Adapter ROM",
73 	.name 	= "Video ROM",
84 	struct pci_driver *drv = to_pci_driver(pdev->dev.driver);  in match_id()
87 	if (pdev->vendor == vendor && pdev->device == device)  in match_id()
90 	for (id = drv ? drv->id_table : NULL; id && id->vendor; id++)  in match_id()
91 		if (id->vendor == vendor && id->device == device)  in match_id()
94 	return id && id->vendor;  in match_id()
123 		const void *rom;  in find_oprom()  local
125 		if (res->end == 0)  in find_oprom()
128 		rom = isa_bus_to_virt(res->start);  in find_oprom()
129 		if (get_kernel_nofault(offset, rom + 0x18) != 0)  in find_oprom()
132 		if (get_kernel_nofault(vendor, rom + offset + 0x4) != 0)  in find_oprom()
135 		if (get_kernel_nofault(device, rom + offset + 0x6) != 0)  in find_oprom()
143 		if (get_kernel_nofault(list, rom + offset + 0x8) == 0 &&  in find_oprom()
144 		    get_kernel_nofault(rev, rom + offset + 0xc) == 0 &&  in find_oprom()
146 		    probe_list(pdev, vendor, rom + offset + list)) {  in find_oprom()
162 	return ioremap(oprom->start, resource_size(oprom));  in pci_map_biosrom()
182 static int __init romsignature(const unsigned char *rom)  in romsignature()  argument
184 	const unsigned short * const ptr = (const unsigned short *)rom;  in romsignature()
190 static int __init romchecksum(const unsigned char *rom, unsigned long length)  in romchecksum()  argument
194 	for (sum = 0; length && get_kernel_nofault(c, rom++) == 0; length--)  in romchecksum()
202 	const unsigned char *rom;  in probe_roms()  local
206 	/* video rom */  in probe_roms()
209 		rom = isa_bus_to_virt(start);  in probe_roms()
210 		if (!romsignature(rom))  in probe_roms()
215 		if (get_kernel_nofault(c, rom + 2) != 0)  in probe_roms()
222 		if (length && romchecksum(rom, length))  in probe_roms()
223 			video_rom_resource.end = start + length - 1;  in probe_roms()
233 	/* system rom */  in probe_roms()
237 	/* check for extension rom (ignore length byte!) */  in probe_roms()
238 	rom = isa_bus_to_virt(extension_rom_resource.start);  in probe_roms()
239 	if (romsignature(rom)) {  in probe_roms()
241 		if (romchecksum(rom, length)) {  in probe_roms()
249 		rom = isa_bus_to_virt(start);  in probe_roms()
250 		if (!romsignature(rom))  in probe_roms()
253 		if (get_kernel_nofault(c, rom + 2) != 0)  in probe_roms()
260 		if (!length || start + length > upper || !romchecksum(rom, length))  in probe_roms()
264 		adapter_rom_resources[i].end = start + length - 1;  in probe_roms()