diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/pci/i386.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 5807d1bc73f..d765da91384 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -31,8 +31,11 @@ #include <linux/ioport.h> #include <linux/errno.h> #include <linux/bootmem.h> +#include <linux/acpi.h> #include <asm/pat.h> +#include <asm/hpet.h> +#include <asm/io_apic.h> #include "pci.h" @@ -77,6 +80,77 @@ pcibios_align_resource(void *data, struct resource *res, } EXPORT_SYMBOL(pcibios_align_resource); +static int check_res_with_valid(struct pci_dev *dev, struct resource *res) +{ + unsigned long base; + unsigned long size; + int i; + + base = res->start; + size = (res->start == 0 && res->end == res->start) ? 0 : + (res->end - res->start + 1); + + if (!base || !size) + return 0; + +#ifdef CONFIG_HPET_TIMER + /* for hpet */ + if (base == hpet_address && (res->flags & IORESOURCE_MEM)) { + dev_info(&dev->dev, "BAR has HPET at %08lx-%08lx\n", + base, base + size - 1); + return 1; + } +#endif + +#ifdef CONFIG_X86_IO_APIC + for (i = 0; i < nr_ioapics; i++) { + unsigned long ioapic_phys = mp_ioapics[i].mp_apicaddr; + + if (base == ioapic_phys && (res->flags & IORESOURCE_MEM)) { + dev_info(&dev->dev, "BAR has ioapic at %08lx-%08lx\n", + base, base + size - 1); + return 1; + } + } +#endif + +#ifdef CONFIG_PCI_MMCONFIG + for (i = 0; i < pci_mmcfg_config_num; i++) { + unsigned long addr; + + addr = pci_mmcfg_config[i].address; + if (base == addr && (res->flags & IORESOURCE_MEM)) { + dev_info(&dev->dev, "BAR has MMCONFIG at %08lx-%08lx\n", + base, base + size - 1); + return 1; + } + } +#endif + + return 0; +} + +static int check_platform(struct pci_dev *dev, struct resource *res) +{ + struct resource *root = NULL; + + /* + * forcibly insert it into the + * resource tree + */ + if (res->flags & IORESOURCE_MEM) + root = &iomem_resource; + else if (res->flags & IORESOURCE_IO) + root = &ioport_resource; + + if (root && check_res_with_valid(dev, res)) { + insert_resource(root, res); + + return 1; + } + + return 0; +} /* * Handle resources of PCI devices. If the world were perfect, we could * just allocate all the resource regions and do nothing more. It isn't. @@ -128,6 +202,8 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list) pr = pci_find_parent_resource(dev, r); if (!r->start || !pr || request_resource(pr, r) < 0) { + if (check_platform(dev, r)) + continue; dev_err(&dev->dev, "BAR %d: can't " "allocate resource\n", idx); /* @@ -171,6 +247,8 @@ static void __init pcibios_allocate_resources(int pass) r->flags, disabled, pass); pr = pci_find_parent_resource(dev, r); if (!pr || request_resource(pr, r) < 0) { + if (check_platform(dev, r)) + continue; dev_err(&dev->dev, "BAR %d: can't " "allocate resource\n", idx); /* We'll assign a new address later */ |