/** * 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; }
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; }
static int intel_dc21285_init(struct pci_dev *dev, struct map_pci_info *map) { unsigned long base, len; base = pci_resource_start(dev, PCI_ROM_RESOURCE); len = pci_resource_len(dev, PCI_ROM_RESOURCE); if (!len || !base) { /* * No ROM resource */ base = pci_resource_start(dev, 2); len = pci_resource_len(dev, 2); /* * We need to re-allocate PCI BAR2 address range to the * PCI ROM BAR, and disable PCI BAR2. */ } else { /* * Hmm, if an address was allocated to the ROM resource, but * not enabled, should we be allocating a new resource for it * or simply enabling it? */ pci_enable_rom(dev); printk("%s: enabling expansion ROM\n", pci_name(dev)); } if (!len || !base) return -ENXIO; map->map.bankwidth = 4; map->map.read = mtd_pci_read32, map->map.write = mtd_pci_write32, map->map.size = len; map->base = ioremap_nocache(base, len); if (!map->base) return -ENOMEM; return 0; }
static loff_t pci_find_rom(struct pci_dev *pdev, size_t *size) { struct resource *res = &pdev->resource[PCI_ROM_RESOURCE]; loff_t start; /* assign the ROM an address if it doesn't have one */ if (res->parent == NULL && pci_assign_resource(pdev, PCI_ROM_RESOURCE)) return 0; start = pci_resource_start(pdev, PCI_ROM_RESOURCE); *size = pci_resource_len(pdev, PCI_ROM_RESOURCE); if (*size == 0) return 0; /* Enable ROM space decodes */ if (pci_enable_rom(pdev)) return 0; return start; }
static void nouveau_bios_shadow_pci(struct nouveau_bios *bios) { struct pci_dev *pdev = nv_device(bios)->pdev; size_t size; if (!pci_enable_rom(pdev)) { void __iomem *rom = pci_map_rom(pdev, &size); if (rom && size) { bios->data = kmalloc(size, GFP_KERNEL); if (bios->data) { memcpy_fromio(bios->data, rom, size); bios->size = size; } } if (rom) pci_unmap_rom(pdev, rom); pci_disable_rom(pdev); } }
/** * 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; void __iomem *image; int last_image; /* * 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. */ image = rom; do { void __iomem *pds; /* Standard PCI ROMs start out with these bytes 55 AA */ if (readb(image) != 0x55) break; if (readb(image + 1) != 0xAA) break; /* get the PCI data structure and check its signature */ pds = image + readw(image + 24); if (readb(pds) != 'P') break; if (readb(pds + 1) != 'C') break; if (readb(pds + 2) != 'I') break; if (readb(pds + 3) != 'R') break; last_image = readb(pds + 21) & 0x80; /* this length is reliable */ image += readw(pds + 16) * 512; } while (!last_image); /* never return a size larger than the PCI resource window */ /* there are known ROMs that get the size wrong */ *size = min((size_t)(image - rom), *size); return rom; }
/** * pci_map_rom - map a PCI ROM to kernel space * @dev: 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; void __iomem *image; int last_image; if (res->flags & IORESOURCE_ROM_SHADOW) { /* IORESOURCE_ROM_SHADOW only set on x86 */ start = (loff_t)0xC0000; /* primary video rom always starts here */ *size = 0x20000; /* cover C000:0 through E000:0 */ } else { if (res->flags & IORESOURCE_ROM_COPY) { *size = pci_resource_len(pdev, PCI_ROM_RESOURCE); return (void __iomem *)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); 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 */ pci_enable_rom(pdev); } } 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. */ image = rom; do { void __iomem *pds; /* Standard PCI ROMs start out with these bytes 55 AA */ if (readb(image) != 0x55) break; if (readb(image + 1) != 0xAA) break; /* get the PCI data structure and check its signature */ pds = image + readw(image + 24); if (readb(pds) != 'P') break; if (readb(pds + 1) != 'C') break; if (readb(pds + 2) != 'I') break; if (readb(pds + 3) != 'R') break; last_image = readb(pds + 21) & 0x80; /* this length is reliable */ image += readw(pds + 16) * 512; } while (!last_image); *size = image - rom; return rom; }