diff options
Diffstat (limited to 'arch/powerpc/platforms/powermac')
| -rw-r--r-- | arch/powerpc/platforms/powermac/cpufreq_32.c | 8 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powermac/feature.c | 13 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powermac/pci.c | 61 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powermac/smp.c | 2 |
4 files changed, 72 insertions, 12 deletions
diff --git a/arch/powerpc/platforms/powermac/cpufreq_32.c b/arch/powerpc/platforms/powermac/cpufreq_32.c index 65c585b8b00..08d94e4cedd 100644 --- a/arch/powerpc/platforms/powermac/cpufreq_32.c +++ b/arch/powerpc/platforms/powermac/cpufreq_32.c @@ -44,14 +44,6 @@ */ #undef DEBUG_FREQ -/* - * There is a problem with the core cpufreq code on SMP kernels, - * it won't recalculate the Bogomips properly - */ -#ifdef CONFIG_SMP -#warning "WARNING, CPUFREQ not recommended on SMP kernels" -#endif - extern void low_choose_7447a_dfs(int dfs); extern void low_choose_750fx_pll(int pll); extern void low_sleep_handler(void); diff --git a/arch/powerpc/platforms/powermac/feature.c b/arch/powerpc/platforms/powermac/feature.c index e6c0040ee79..fbc9bbd74db 100644 --- a/arch/powerpc/platforms/powermac/feature.c +++ b/arch/powerpc/platforms/powermac/feature.c @@ -2419,13 +2419,13 @@ static int __init probe_motherboard(void) dt = of_find_node_by_name(NULL, "device-tree"); if (dt != NULL) model = of_get_property(dt, "model", NULL); - for(i=0; model && i<(sizeof(pmac_mb_defs)/sizeof(struct pmac_mb_def)); i++) { + for(i=0; model && i<ARRAY_SIZE(pmac_mb_defs); i++) { if (strcmp(model, pmac_mb_defs[i].model_string) == 0) { pmac_mb = pmac_mb_defs[i]; goto found; } } - for(i=0; i<(sizeof(pmac_mb_defs)/sizeof(struct pmac_mb_def)); i++) { + for(i=0; i<ARRAY_SIZE(pmac_mb_defs); i++) { if (machine_is_compatible(pmac_mb_defs[i].model_string)) { pmac_mb = pmac_mb_defs[i]; goto found; @@ -2589,9 +2589,16 @@ static void __init probe_uninorth(void) if (address == 0) return; uninorth_base = ioremap(address, 0x40000); + if (uninorth_base == NULL) + return; uninorth_rev = in_be32(UN_REG(UNI_N_VERSION)); - if (uninorth_maj == 3 || uninorth_maj == 4) + if (uninorth_maj == 3 || uninorth_maj == 4) { u3_ht_base = ioremap(address + U3_HT_CONFIG_BASE, 0x1000); + if (u3_ht_base == NULL) { + iounmap(uninorth_base); + return; + } + } printk(KERN_INFO "Found %s memory controller & host bridge" " @ 0x%08x revision: 0x%02x\n", uninorth_maj == 3 ? "U3" : diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c index 04cdd32624d..e81403b245b 100644 --- a/arch/powerpc/platforms/powermac/pci.c +++ b/arch/powerpc/platforms/powermac/pci.c @@ -1286,3 +1286,64 @@ static void fixup_k2_sata(struct pci_dev* dev) } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SERVERWORKS, 0x0240, fixup_k2_sata); +/* + * On U4 (aka CPC945) the PCIe root complex "P2P" bridge resource ranges aren't + * configured by the firmware. The bridge itself seems to ignore them but it + * causes problems with Linux which then re-assigns devices below the bridge, + * thus changing addresses of those devices from what was in the device-tree, + * which sucks when those are video cards using offb + * + * We could just mark it transparent but I prefer fixing up the resources to + * properly show what's going on here, as I have some doubts about having them + * badly configured potentially being an issue for DMA. + * + * We leave PIO alone, it seems to be fine + * + * Oh and there's another funny bug. The OF properties advertize the region + * 0xf1000000..0xf1ffffff as being forwarded as memory space. But that's + * actually not true, this region is the memory mapped config space. So we + * also need to filter it out or we'll map things in the wrong place. + */ +static void fixup_u4_pcie(struct pci_dev* dev) +{ + struct pci_controller *host = pci_bus_to_host(dev->bus); + struct resource *region = NULL; + u32 reg; + int i; + + /* Only do that on PowerMac */ + if (!machine_is(powermac)) + return; + + /* Find the largest MMIO region */ + for (i = 0; i < 3; i++) { + struct resource *r = &host->mem_resources[i]; + if (!(r->flags & IORESOURCE_MEM)) + continue; + /* Skip the 0xf0xxxxxx..f2xxxxxx regions, we know they + * are reserved by HW for other things + */ + if (r->start >= 0xf0000000 && r->start < 0xf3000000) + continue; + if (!region || (r->end - r->start) > + (region->end - region->start)) + region = r; + } + /* Nothing found, bail */ + if (region == 0) + return; + + /* Print things out */ + printk(KERN_INFO "PCI: Fixup U4 PCIe bridge range: %pR\n", region); + + /* Fixup bridge config space. We know it's a Mac, resource aren't + * offset so let's just blast them as-is. We also know that they + * fit in 32 bits + */ + reg = ((region->start >> 16) & 0xfff0) | (region->end & 0xfff00000); + pci_write_config_dword(dev, PCI_MEMORY_BASE, reg); + pci_write_config_dword(dev, PCI_PREF_BASE_UPPER32, 0); + pci_write_config_dword(dev, PCI_PREF_LIMIT_UPPER32, 0); + pci_write_config_dword(dev, PCI_PREF_MEMORY_BASE, 0); +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_U4_PCIE, fixup_u4_pcie); diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c index 6d4da7b46b4..937a38e7317 100644 --- a/arch/powerpc/platforms/powermac/smp.c +++ b/arch/powerpc/platforms/powermac/smp.c @@ -408,7 +408,7 @@ static void __init smp_psurge_setup_cpu(int cpu_nr) /* reset the entry point so if we get another intr we won't * try to startup again */ out_be32(psurge_start, 0x100); - if (setup_irq(30, &psurge_irqaction)) + if (setup_irq(irq_create_mapping(NULL, 30), &psurge_irqaction)) printk(KERN_ERR "Couldn't get primary IPI interrupt"); } |