diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/probe_roms.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/kernel/probe_roms.c | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/probe_roms.c b/ANDROID_3.4.5/arch/x86/kernel/probe_roms.c deleted file mode 100644 index 0bc72e20..00000000 --- a/ANDROID_3.4.5/arch/x86/kernel/probe_roms.c +++ /dev/null @@ -1,268 +0,0 @@ -#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 <linux/export.h> - -#include <asm/probe_roms.h> -#include <asm/pci-direct.h> -#include <asm/e820.h> -#include <asm/mmzone.h> -#include <asm/setup.h> -#include <asm/sections.h> -#include <asm/io.h> -#include <asm/setup_arch.h> - -static struct resource system_rom_resource = { - .name = "System ROM", - .start = 0xf0000, - .end = 0xfffff, - .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM -}; - -static struct resource extension_rom_resource = { - .name = "Extension ROM", - .start = 0xe0000, - .end = 0xeffff, - .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM -}; - -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 -} }; - -static struct resource video_rom_resource = { - .name = "Video ROM", - .start = 0xc0000, - .end = 0xc7fff, - .flags = IORESOURCE_BUSY | IORESOURCE_READONLY | IORESOURCE_MEM -}; - -/* does this oprom support the given pci device, or any of the devices - * that the driver supports? - */ -static bool match_id(struct pci_dev *pdev, unsigned short vendor, unsigned short device) -{ - struct pci_driver *drv = pdev->driver; - const struct pci_device_id *id; - - if (pdev->vendor == vendor && pdev->device == device) - return true; - - for (id = drv ? drv->id_table : NULL; id && id->vendor; id++) - if (id->vendor == vendor && id->device == device) - break; - - return id && id->vendor; -} - -static bool probe_list(struct pci_dev *pdev, unsigned short vendor, - const unsigned char *rom_list) -{ - unsigned short device; - - do { - if (probe_kernel_address(rom_list, device) != 0) - device = 0; - - if (device && match_id(pdev, vendor, device)) - break; - - rom_list += 2; - } while (device); - - return !!device; -} - -static struct resource *find_oprom(struct pci_dev *pdev) -{ - struct resource *oprom = NULL; - int i; - - for (i = 0; i < ARRAY_SIZE(adapter_rom_resources); i++) { - struct resource *res = &adapter_rom_resources[i]; - unsigned short offset, vendor, device, list, rev; - const unsigned char *rom; - - if (res->end == 0) - break; - - rom = isa_bus_to_virt(res->start); - if (probe_kernel_address(rom + 0x18, offset) != 0) - continue; - - if (probe_kernel_address(rom + offset + 0x4, vendor) != 0) - continue; - - if (probe_kernel_address(rom + offset + 0x6, device) != 0) - continue; - - if (match_id(pdev, vendor, device)) { - oprom = res; - break; - } - - if (probe_kernel_address(rom + offset + 0x8, list) == 0 && - probe_kernel_address(rom + offset + 0xc, rev) == 0 && - rev >= 3 && list && - probe_list(pdev, vendor, rom + offset + list)) { - oprom = res; - break; - } - } - - return oprom; -} - -void *pci_map_biosrom(struct pci_dev *pdev) -{ - struct resource *oprom = find_oprom(pdev); - - if (!oprom) - return NULL; - - return ioremap(oprom->start, resource_size(oprom)); -} -EXPORT_SYMBOL(pci_map_biosrom); - -void pci_unmap_biosrom(void __iomem *image) -{ - iounmap(image); -} -EXPORT_SYMBOL(pci_unmap_biosrom); - -size_t pci_biosrom_size(struct pci_dev *pdev) -{ - struct resource *oprom = find_oprom(pdev); - - return oprom ? resource_size(oprom) : 0; -} -EXPORT_SYMBOL(pci_biosrom_size); - -#define ROMSIGNATURE 0xaa55 - -static int __init romsignature(const unsigned char *rom) -{ - const unsigned short * const ptr = (const unsigned short *)rom; - unsigned short sig; - - return probe_kernel_address(ptr, sig) == 0 && sig == ROMSIGNATURE; -} - -static int __init romchecksum(const unsigned char *rom, unsigned long length) -{ - unsigned char sum, c; - - for (sum = 0; length && probe_kernel_address(rom++, c) == 0; length--) - sum += c; - return !length && !sum; -} - -void __init probe_roms(void) -{ - const unsigned char *rom; - unsigned long start, length, upper; - unsigned char c; - 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; - - if (probe_kernel_address(rom + 2, c) != 0) - continue; - - /* 0 < length <= 0x7f * 512, historically */ - length = c * 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 = resource_size(&extension_rom_resource); - 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 < 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; - - /* 0 < length <= 0x7f * 512, historically */ - length = c * 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; - } -} - |