diff options
Diffstat (limited to 'arch/ia64/pci/fixup.c')
| -rw-r--r-- | arch/ia64/pci/fixup.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/arch/ia64/pci/fixup.c b/arch/ia64/pci/fixup.c deleted file mode 100644 index 2bcdd7d3a1ad..000000000000 --- a/arch/ia64/pci/fixup.c +++ /dev/null @@ -1,80 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Exceptions for specific devices. Usually work-arounds for fatal design flaws. - * Derived from fixup.c of i386 tree. - */ - -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/vgaarb.h> -#include <linux/screen_info.h> -#include <asm/uv/uv.h> - -/* - * Fixup to mark boot BIOS video selected by BIOS before it changes - * - * From information provided by "Jon Smirl" <jonsmirl@gmail.com> - * - * 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 its BIOS copied to 0xC0000 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. Before marking the device - * with IORESOURCE_ROM_SHADOW check if a vga_default_device is already set - * by either arch code or vga-arbitration; if so only apply the fixup to this - * already-determined primary video card. - */ - -static void pci_fixup_video(struct pci_dev *pdev) -{ - struct pci_dev *bridge; - struct pci_bus *bus; - u16 config; - struct resource *res; - - if (is_uv_system()) - return; - /* Maybe, this machine supports legacy memory map. */ - - /* Is VGA routed to us? */ - bus = pdev->bus; - while (bus) { - bridge = bus->self; - - /* - * From information provided by - * "David Miller" <davem@davemloft.net> - * The bridge control register is valid for PCI header - * type BRIDGE, or CARDBUS. Host to PCI controllers use - * PCI header type NORMAL. - */ - if (bridge && (pci_is_bridge(bridge))) { - pci_read_config_word(bridge, PCI_BRIDGE_CONTROL, - &config); - if (!(config & PCI_BRIDGE_CTL_VGA)) - return; - } - bus = bus->parent; - } - if (!vga_default_device() || pdev == vga_default_device()) { - pci_read_config_word(pdev, PCI_COMMAND, &config); - if (config & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { - res = &pdev->resource[PCI_ROM_RESOURCE]; - - pci_disable_rom(pdev); - if (res->parent) - release_resource(res); - - res->start = 0xC0000; - res->end = res->start + 0x20000 - 1; - res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW | - IORESOURCE_PCI_FIXED; - dev_info(&pdev->dev, "Video device with shadowed ROM at %pR\n", - res); - } - } -} -DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_ANY_ID, PCI_ANY_ID, - PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video); |