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authorLinus Torvalds <torvalds@linux-foundation.org>2011-05-19 18:08:06 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-19 18:08:06 -0700
commit08b5d06ec6cff1d952f13cfcffcbf41ff0ce2c86 (patch)
tree0d087f009b80bdf54f22fdb78437af790c1afc27 /arch/x86/kernel
parent13588209aa90d9c8e502750fc86160314555612f (diff)
parent5d94e81f69d4b1d1102d3ab557ce0a817c11fbbb (diff)
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Introduce pci_map_biosrom() x86, olpc: Use device tree for platform identification
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/Makefile2
-rw-r--r--arch/x86/kernel/head32.c1
-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.c2
4 files changed, 103 insertions, 3 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 97ebf82e0b7f..250806472a7e 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 d6d6bb361931..3bb08509a7a1 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 071e7fea42e5..ba0a4cce53be 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 75ef4b18e9b7..6f164bd5e14d 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,
},

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