diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/pci-common.c | 21 | ||||
| -rw-r--r-- | arch/powerpc/kernel/pci_64.c | 15 |
2 files changed, 26 insertions, 10 deletions
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 9c69e7e145c..4fee63cb53f 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -1366,12 +1366,17 @@ static void __init pcibios_allocate_resources(int pass) for_each_pci_dev(dev) { pci_read_config_word(dev, PCI_COMMAND, &command); - for (idx = 0; idx < 6; idx++) { + for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) { r = &dev->resource[idx]; if (r->parent) /* Already allocated */ continue; if (!r->flags || (r->flags & IORESOURCE_UNSET)) continue; /* Not assigned at all */ + /* We only allocate ROMs on pass 1 just in case they + * have been screwed up by firmware + */ + if (idx == PCI_ROM_RESOURCE ) + disabled = 1; if (r->flags & IORESOURCE_IO) disabled = !(command & PCI_COMMAND_IO); else @@ -1382,17 +1387,19 @@ static void __init pcibios_allocate_resources(int pass) if (pass) continue; r = &dev->resource[PCI_ROM_RESOURCE]; - if (r->flags & IORESOURCE_ROM_ENABLE) { + if (r->flags) { /* Turn the ROM off, leave the resource region, * but keep it unregistered. */ u32 reg; - pr_debug("PCI: Switching off ROM of %s\n", - pci_name(dev)); - r->flags &= ~IORESOURCE_ROM_ENABLE; pci_read_config_dword(dev, dev->rom_base_reg, ®); - pci_write_config_dword(dev, dev->rom_base_reg, - reg & ~PCI_ROM_ADDRESS_ENABLE); + if (reg & PCI_ROM_ADDRESS_ENABLE) { + pr_debug("PCI: Switching off ROM of %s\n", + pci_name(dev)); + r->flags &= ~IORESOURCE_ROM_ENABLE; + pci_write_config_dword(dev, dev->rom_base_reg, + reg & ~PCI_ROM_ADDRESS_ENABLE); + } } } } diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index be574fc0d92..96edb6f8bab 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -64,7 +64,7 @@ static u32 get_int_prop(struct device_node *np, const char *name, u32 def) return def; } -static unsigned int pci_parse_of_flags(u32 addr0) +static unsigned int pci_parse_of_flags(u32 addr0, int bridge) { unsigned int flags = 0; @@ -75,8 +75,17 @@ static unsigned int pci_parse_of_flags(u32 addr0) if (addr0 & 0x40000000) flags |= IORESOURCE_PREFETCH | PCI_BASE_ADDRESS_MEM_PREFETCH; + /* Note: We don't know whether the ROM has been left enabled + * by the firmware or not. We mark it as disabled (ie, we do + * not set the IORESOURCE_ROM_ENABLE flag) for now rather than + * do a config space read, it will be force-enabled if needed + */ + if (!bridge && (addr0 & 0xff) == 0x30) + flags |= IORESOURCE_READONLY; } else if (addr0 & 0x01000000) flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO; + if (flags) + flags |= IORESOURCE_SIZEALIGN; return flags; } @@ -95,7 +104,7 @@ static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev) return; pr_debug(" parse addresses (%d bytes) @ %p\n", proplen, addrs); for (; proplen >= 20; proplen -= 20, addrs += 5) { - flags = pci_parse_of_flags(addrs[0]); + flags = pci_parse_of_flags(addrs[0], 0); if (!flags) continue; base = of_read_number(&addrs[1], 2); @@ -293,7 +302,7 @@ void __devinit of_scan_pci_bridge(struct device_node *node, } i = 1; for (; len >= 32; len -= 32, ranges += 8) { - flags = pci_parse_of_flags(ranges[0]); + flags = pci_parse_of_flags(ranges[0], 1); size = of_read_number(&ranges[6], 2); if (flags == 0 || size == 0) continue; |