diff options
| -rw-r--r-- | arch/x86/include/asm/probe_roms.h | 8 | ||||
| -rw-r--r-- | arch/x86/include/asm/setup.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/head32.c | 1 | ||||
| -rw-r--r-- | arch/x86/kernel/probe_roms.c (renamed from arch/x86/kernel/probe_roms_32.c) | 101 | ||||
| -rw-r--r-- | arch/x86/kernel/x86_init.c | 2 |
6 files changed, 112 insertions, 4 deletions
diff --git a/arch/x86/include/asm/probe_roms.h b/arch/x86/include/asm/probe_roms.h new file mode 100644 index 0000000..4950a0b --- /dev/null +++ b/arch/x86/include/asm/probe_roms.h @@ -0,0 +1,8 @@ +#ifndef _PROBE_ROMS_H_ +#define _PROBE_ROMS_H_ +struct pci_dev; + +extern void __iomem *pci_map_biosrom(struct pci_dev *pdev); +extern void pci_unmap_biosrom(void __iomem *rom); +extern size_t pci_biosrom_size(struct pci_dev *pdev); +#endif diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h index db8aa19..03d3a32 100644 --- a/arch/x86/include/asm/setup.h +++ b/arch/x86/include/asm/setup.h @@ -104,10 +104,10 @@ void *extend_brk(size_t size, size_t align); type *name; \ RESERVE_BRK(name, sizeof(type) * entries) +extern void probe_roms(void); #ifdef __i386__ void __init i386_start_kernel(void); -extern void probe_roms(void); #else void __init x86_64_start_kernel(char *real_mode); diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 62445ba..f33d738 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -36,7 +36,7 @@ obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o obj-y += time.o ioport.o ldt.o dumpstack.o obj-y += setup.o x86_init.o i8259.o irqinit.o jump_label.o obj-$(CONFIG_IRQ_WORK) += irq_work.o -obj-$(CONFIG_X86_32) += probe_roms_32.o +obj-y += probe_roms.o obj-$(CONFIG_X86_32) += sys_i386_32.o i386_ksyms_32.o obj-$(CONFIG_X86_64) += sys_x86_64.o x8664_ksyms_64.o obj-$(CONFIG_X86_64) += syscall_64.o vsyscall_64.o diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c index 7f138b3..eab4940 100644 --- a/arch/x86/kernel/head32.c +++ b/arch/x86/kernel/head32.c @@ -23,7 +23,6 @@ static void __init i386_default_early_setup(void) { /* Initialize 32bit specific setup functions */ - x86_init.resources.probe_roms = probe_roms; x86_init.resources.reserve_resources = i386_reserve_resources; x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc; diff --git a/arch/x86/kernel/probe_roms_32.c b/arch/x86/kernel/probe_roms.c index 071e7fe..ba0a4cc 100644 --- a/arch/x86/kernel/probe_roms_32.c +++ b/arch/x86/kernel/probe_roms.c @@ -73,6 +73,107 @@ static struct resource video_rom_resource = { .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) diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c index c11514e9..6eee082 100644 --- a/arch/x86/kernel/x86_init.c +++ b/arch/x86/kernel/x86_init.c @@ -35,7 +35,7 @@ void iommu_shutdown_noop(void) { } struct x86_init_ops x86_init __initdata = { .resources = { - .probe_roms = x86_init_noop, + .probe_roms = probe_roms, .reserve_resources = reserve_standard_io_resources, .memory_setup = default_machine_specific_memory_setup, }, |