summaryrefslogtreecommitdiff
path: root/src/device/pci_rom.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/device/pci_rom.c')
-rw-r--r--src/device/pci_rom.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/src/device/pci_rom.c b/src/device/pci_rom.c
index 8366fea357..20621d36b2 100644
--- a/src/device/pci_rom.c
+++ b/src/device/pci_rom.c
@@ -169,3 +169,68 @@ struct rom_header *pci_rom_load(struct device *dev,
pci_ram_image_start += rom_size;
return (struct rom_header *) (pci_ram_image_start-rom_size);
}
+
+/* ACPI */
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+static unsigned long
+pci_rom_acpi_fill_vfct(struct device *device,
+ struct acpi_vfct *vfct_struct,
+ unsigned long current)
+{
+ struct acpi_vfct_image_hdr *header = &vfct_struct->image_hdr;
+ struct rom_header *rom;
+
+ vfct_struct->VBIOSImageOffset = (size_t)header - (size_t)vfct_struct;
+
+ rom = pci_rom_probe(device);
+ if (!rom) {
+ printk(BIOS_ERR, "pci_rom_acpi_fill_vfct failed\n");
+ return current;
+ }
+
+ header->DeviceID = device->device;
+ header->VendorID = device->vendor;
+ header->PCIBus = device->bus->secondary;
+ header->PCIFunction = PCI_FUNC(device->path.pci.devfn);
+ header->PCIDevice = PCI_SLOT(device->path.pci.devfn);
+ header->ImageLength = rom->size * 512;
+ memcpy((void *)&header->VbiosContent, rom, header->ImageLength);
+
+ current += header->ImageLength;
+ return current;
+}
+
+unsigned long
+pci_rom_write_acpi_tables(struct device *device,
+ unsigned long current,
+ struct acpi_rsdp *rsdp)
+{
+ struct acpi_vfct *vfct;
+ struct rom_header *rom;
+
+ /* Only handle VGA devices */
+ if ((device->class >> 8) != PCI_CLASS_DISPLAY_VGA)
+ return current;
+
+ /* Only handle enabled devices */
+ if (!device->enabled)
+ return current;
+
+ /* Probe for option rom */
+ rom = pci_rom_probe(device);
+ if (!rom)
+ return current;
+
+ /* AMD/ATI uses VFCT */
+ if (device->vendor == PCI_VENDOR_ID_ATI) {
+ current = ALIGN(current, 8);
+ printk(BIOS_DEBUG, "ACPI: * VFCT at %lx\n", current);
+ vfct = (struct acpi_vfct *)current;
+ acpi_create_vfct(device, vfct, pci_rom_acpi_fill_vfct);
+ current += vfct->header.length;
+ acpi_add_table(rsdp, vfct);
+ }
+
+ return current;
+}
+#endif