pci_fixup_video turns into generic code because there are many platforms need this fixup
for embedded VGA as well as x86. The Video BIOS integrates into System BIOS on a machine
has embedded VGA although embedded VGA generally don't have PCI ROM. As a result,
embedded VGA need the way that the sysfs rom points to the Video BIOS of System
RAM (0xC0000). PCI-to-PCI Bridge Architecture specification describes the condition whether
or not PCI ROM forwards VGA compatible memory address. fixup_video suits this specification.
Although the Video ROM generally implements in x86 code regardless of platform, some
application such as X Window System can run this code by dosemu86. Therefore,
pci_fixup_video should turn into generic code.
Signed-off-by: Eiichiro Oiwa <[email protected]>
---
diff -dupNr linux-2.6.18.orig/arch/i386/pci/fixup.c linux-2.6.18/arch/i386/pci/fixup.c
--- linux-2.6.18.orig/arch/i386/pci/fixup.c 2006-09-20 12:42:06.000000000 +0900
+++ linux-2.6.18/arch/i386/pci/fixup.c 2006-09-27 14:18:55.000000000 +0900
@@ -343,51 +343,6 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_IN
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MCH_PC1, pcie_rootport_aspm_quirk );
/*
- * Fixup to mark boot BIOS video selected by BIOS before it changes
- *
- * From information provided by "Jon Smirl" <[email protected]>
- *
- * The standard boot ROM sequence for an x86 machine uses the BIOS
- * to select an initial video card for boot display. This boot video
- * card will have it's BIOS copied to C0000 in system RAM.
- * IORESOURCE_ROM_SHADOW is used to associate the boot video
- * card with this copy. On laptops this copy has to be used since
- * the main ROM may be compressed or combined with another image.
- * See pci_map_rom() for use of this flag. IORESOURCE_ROM_SHADOW
- * is marked here since the boot video device will be the only enabled
- * video device at this point.
- */
-
-static void __devinit pci_fixup_video(struct pci_dev *pdev)
-{
- struct pci_dev *bridge;
- struct pci_bus *bus;
- u16 config;
-
- if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
- return;
-
- /* Is VGA routed to us? */
- bus = pdev->bus;
- while (bus) {
- bridge = bus->self;
- if (bridge) {
- pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
- &config);
- if (!(config & PCI_BRIDGE_CTL_VGA))
- return;
- }
- bus = bus->parent;
- }
- pci_read_config_word(pdev, PCI_COMMAND, &config);
- if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
- pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
- printk(KERN_DEBUG "Boot video device is %s\n", pci_name(pdev));
- }
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_video);
-
-/*
* Some Toshiba laptops need extra code to enable their TI TSB43AB22/A.
*
* We pretend to bring them out of full D3 state, and restore the proper
diff -dupNr linux-2.6.18.orig/drivers/pci/quirks.c linux-2.6.18/drivers/pci/quirks.c
--- linux-2.6.18.orig/drivers/pci/quirks.c 2006-09-20 12:42:06.000000000 +0900
+++ linux-2.6.18/drivers/pci/quirks.c 2006-09-27 14:46:40.000000000 +0900
@@ -1590,6 +1590,51 @@ static void __devinit fixup_rev1_53c810(
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NCR, PCI_DEVICE_ID_NCR_53C810, fixup_rev1_53c810);
+/*
+ * Fixup to mark boot BIOS video selected by BIOS before it changes
+ *
+ * From information provided by "Jon Smirl" <[email protected]>
+ *
+ * The standard boot ROM sequence for an x86 machine uses the BIOS
+ * to select an initial video card for boot display. This boot video
+ * card will have it's BIOS copied to C0000 in system RAM.
+ * IORESOURCE_ROM_SHADOW is used to associate the boot video
+ * card with this copy. On laptops this copy has to be used since
+ * the main ROM may be compressed or combined with another image.
+ * See pci_map_rom() for use of this flag. IORESOURCE_ROM_SHADOW
+ * is marked here since the boot video device will be the only enabled
+ * video device at this point.
+ */
+
+static void __devinit fixup_video(struct pci_dev *pdev)
+{
+ struct pci_dev *bridge;
+ struct pci_bus *bus;
+ u16 config;
+
+ if ((pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
+ return;
+
+ /* Is VGA routed to us? */
+ bus = pdev->bus;
+ while (bus) {
+ bridge = bus->self;
+ if (bridge) {
+ pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
+ &config);
+ if (!(config & PCI_BRIDGE_CTL_VGA))
+ return;
+ }
+ bus = bus->parent;
+ }
+ pci_read_config_word(pdev, PCI_COMMAND, &config);
+ if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
+ pdev->resource[PCI_ROM_RESOURCE].flags |= IORESOURCE_ROM_SHADOW;
+ printk(KERN_DEBUG "Boot video device is %s\n", pci_name(pdev));
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, fixup_video);
+
static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f, struct pci_fixup *end)
{
diff -dupNr linux-2.6.18.orig/drivers/pci/rom.c linux-2.6.18/drivers/pci/rom.c
--- linux-2.6.18.orig/drivers/pci/rom.c 2006-09-20 12:42:06.000000000 +0900
+++ linux-2.6.18/drivers/pci/rom.c 2006-09-28 12:30:24.000000000 +0900
@@ -71,7 +71,10 @@ void __iomem *pci_map_rom(struct pci_dev
void __iomem *image;
int last_image;
- /* IORESOURCE_ROM_SHADOW only set on x86 */
+ /*
+ * IORESOURCE_ROM_SHADOW set if the VGA enable bit of the Bridge Control
+ * register is set for embedded VGA.
+ */
if (res->flags & IORESOURCE_ROM_SHADOW) {
/* primary video rom always starts here */
start = (loff_t)0xC0000;
-
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