void __iomem *pci_map_rom(struct pci_dev *pdev, size_t *size) { struct resource *res = &pdev->resource[PCI_ROM_RESOURCE]; loff_t start; void __iomem *rom; /* */ if (res->flags & IORESOURCE_ROM_SHADOW) { /* */ start = (loff_t)0xC0000; *size = 0x20000; /* */ } else { if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_BIOS_COPY)) { *size = pci_resource_len(pdev, PCI_ROM_RESOURCE); return (void __iomem *)(unsigned long) pci_resource_start(pdev, PCI_ROM_RESOURCE); } else { /* */ if (res->parent == NULL && pci_assign_resource(pdev,PCI_ROM_RESOURCE)) return NULL; start = pci_resource_start(pdev, PCI_ROM_RESOURCE); *size = pci_resource_len(pdev, PCI_ROM_RESOURCE); if (*size == 0) return NULL; /* */ if (pci_enable_rom(pdev)) return NULL; } } rom = ioremap(start, *size); if (!rom) { /* */ if (!(res->flags & (IORESOURCE_ROM_ENABLE | IORESOURCE_ROM_SHADOW | IORESOURCE_ROM_COPY))) pci_disable_rom(pdev); return NULL; } /* */ *size = pci_get_rom_size(pdev, rom, *size); return rom; }
/** * pci_map_rom - map a PCI ROM to kernel space * @pdev: pointer to pci device struct * @size: pointer to receive size of pci window over ROM * @return: kernel virtual pointer to image of ROM * * Map a PCI ROM into kernel space. If ROM is boot video ROM, * the shadow BIOS copy will be returned instead of the * actual ROM. */ void __iomem *pci_map_rom(struct pci_dev *pdev, size_t *size) { struct resource *res = &pdev->resource[PCI_ROM_RESOURCE]; loff_t start; void __iomem *rom; /* * IORESOURCE_ROM_SHADOW set on x86, x86_64 and IA64 supports legacy * memory map 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; *size = 0x20000; /* cover C000:0 through E000:0 */ } else { if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_BIOS_COPY)) { *size = pci_resource_len(pdev, PCI_ROM_RESOURCE); return (void __iomem *)(unsigned long) pci_resource_start(pdev, PCI_ROM_RESOURCE); } else { /* assign the ROM an address if it doesn't have one */ if (res->parent == NULL && pci_assign_resource(pdev,PCI_ROM_RESOURCE)) return NULL; start = pci_resource_start(pdev, PCI_ROM_RESOURCE); *size = pci_resource_len(pdev, PCI_ROM_RESOURCE); if (*size == 0) return NULL; /* Enable ROM space decodes */ if (pci_enable_rom(pdev)) return NULL; } } rom = ioremap(start, *size); if (!rom) { /* restore enable if ioremap fails */ if (!(res->flags & (IORESOURCE_ROM_ENABLE | IORESOURCE_ROM_SHADOW | IORESOURCE_ROM_COPY))) pci_disable_rom(pdev); return NULL; } /* * Try to find the true size of the ROM since sometimes the PCI window * size is much larger than the actual size of the ROM. * True size is important if the ROM is going to be copied. */ *size = pci_get_rom_size(rom, *size); return rom; }
/** * pci_map_rom - map a PCI ROM to kernel space * @pdev: pointer to pci device struct * @size: pointer to receive size of pci window over ROM * * Return: kernel virtual pointer to image of ROM * * Map a PCI ROM into kernel space. If ROM is boot video ROM, * the shadow BIOS copy will be returned instead of the * actual ROM. */ void __iomem *pci_map_rom(struct pci_dev *pdev, size_t *size) { struct resource *res = &pdev->resource[PCI_ROM_RESOURCE]; loff_t start = 0; void __iomem *rom; /* * IORESOURCE_ROM_SHADOW set on x86, x86_64 and IA64 supports legacy * memory map 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; *size = 0x20000; /* cover C000:0 through E000:0 */ } else { if (res->flags & (IORESOURCE_ROM_COPY | IORESOURCE_ROM_BIOS_COPY)) { *size = pci_resource_len(pdev, PCI_ROM_RESOURCE); return (void __iomem *)(unsigned long) pci_resource_start(pdev, PCI_ROM_RESOURCE); } else { start = pci_find_rom(pdev, size); } } /* * Some devices may provide ROMs via a source other than the BAR */ if (!start && pdev->rom && pdev->romlen) { *size = pdev->romlen; return phys_to_virt(pdev->rom); } if (!start) return NULL; rom = ioremap(start, *size); if (!rom) { /* restore enable if ioremap fails */ if (!(res->flags & (IORESOURCE_ROM_ENABLE | IORESOURCE_ROM_SHADOW | IORESOURCE_ROM_COPY))) pci_disable_rom(pdev); return NULL; } /* * Try to find the true size of the ROM since sometimes the PCI window * size is much larger than the actual size of the ROM. * True size is important if the ROM is going to be copied. */ *size = pci_get_rom_size(pdev, rom, *size); return rom; }