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authorMarshall Dawson <marshalldawson3rd@gmail.com>2017-04-19 18:31:07 -0600
committerMarc Jones <marc@marcjonesconsulting.com>2017-04-27 18:17:57 +0200
commit6f978cfd1ab6a57e5729e19bed3df7702c4f09cb (patch)
treeb3247db4f40891eab2e41401b34df9f32e998eea
parent790aab6c778c35e0fff662ee03be04cc79c81685 (diff)
downloadcoreboot-6f978cfd1ab6a57e5729e19bed3df7702c4f09cb.tar.xz
x86/acpi: Use initialized VBIOS in VFCT table
AMD VBIOS option ROMs often modify themselves during initialization. Check for the presence of a VBIOS at 0xc0000 before populating the VFCT table. If a matching ROM is found, use it for the source of the copy. Tested on Gardenia (Stoney) variant by observing amdgpu driver's dmesg output. Change-Id: I5be7e1562bde51800c5b0e704c79812d85bcf362 Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com> Reviewed-on: https://review.coreboot.org/19383 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>
-rw-r--r--src/device/pci_rom.c38
1 files changed, 36 insertions, 2 deletions
diff --git a/src/device/pci_rom.c b/src/device/pci_rom.c
index 20621d36b2..a3f5775a1b 100644
--- a/src/device/pci_rom.c
+++ b/src/device/pci_rom.c
@@ -18,6 +18,7 @@
*/
#include <console/console.h>
+#include <commonlib/endian.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
@@ -172,6 +173,31 @@ struct rom_header *pci_rom_load(struct device *dev,
/* ACPI */
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+
+/* VBIOS may be modified after oprom init so use the copy if present. */
+static struct rom_header *check_initialized(struct device *dev)
+{
+ struct rom_header *run_rom;
+ struct pci_data *rom_data;
+
+ if (!IS_ENABLED(CONFIG_VGA_ROM_RUN))
+ return NULL;
+
+ run_rom = (struct rom_header *)(uintptr_t)PCI_VGA_RAM_IMAGE_START;
+ if (read_le16(&run_rom->signature) != PCI_ROM_HDR)
+ return NULL;
+
+ rom_data = (struct pci_data *)((u8 *)run_rom
+ + read_le32(&run_rom->data));
+
+ if (read_le32(&rom_data->signature) == PCI_DATA_HDR
+ && read_le16(&rom_data->device) == dev->device
+ && read_le16(&rom_data->vendor) == dev->vendor)
+ return run_rom;
+ else
+ return NULL;
+}
+
static unsigned long
pci_rom_acpi_fill_vfct(struct device *device,
struct acpi_vfct *vfct_struct,
@@ -182,12 +208,20 @@ pci_rom_acpi_fill_vfct(struct device *device,
vfct_struct->VBIOSImageOffset = (size_t)header - (size_t)vfct_struct;
- rom = pci_rom_probe(device);
+ rom = check_initialized(device);
+ if (!rom)
+ rom = pci_rom_probe(device);
if (!rom) {
printk(BIOS_ERR, "pci_rom_acpi_fill_vfct failed\n");
return current;
}
+ printk(BIOS_DEBUG, " Copying %sVBIOS image from %p\n",
+ rom == (struct rom_header *)
+ (uintptr_t)PCI_VGA_RAM_IMAGE_START ?
+ "initialized " : "",
+ rom);
+
header->DeviceID = device->device;
header->VendorID = device->vendor;
header->PCIBus = device->bus->secondary;
@@ -224,7 +258,7 @@ pci_rom_write_acpi_tables(struct device *device,
/* AMD/ATI uses VFCT */
if (device->vendor == PCI_VENDOR_ID_ATI) {
current = ALIGN(current, 8);
- printk(BIOS_DEBUG, "ACPI: * VFCT at %lx\n", current);
+ 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;