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Diffstat (limited to 'arch/i386/kernel/acpi')
-rw-r--r--arch/i386/kernel/acpi/boot.c41
1 files changed, 33 insertions, 8 deletions
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c
index f5360d88bcf..b7808a89d94 100644
--- a/arch/i386/kernel/acpi/boot.c
+++ b/arch/i386/kernel/acpi/boot.c
@@ -159,9 +159,15 @@ char *__acpi_map_table(unsigned long phys, unsigned long size)
#endif
#ifdef CONFIG_PCI_MMCONFIG
-static int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
+/* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
+struct acpi_table_mcfg_config *pci_mmcfg_config;
+int pci_mmcfg_config_num;
+
+int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
{
struct acpi_table_mcfg *mcfg;
+ unsigned long i;
+ int config_size;
if (!phys_addr || !size)
return -EINVAL;
@@ -172,18 +178,38 @@ static int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
return -ENODEV;
}
- if (mcfg->base_reserved) {
- printk(KERN_ERR PREFIX "MMCONFIG not in low 4GB of memory\n");
+ /* how many config structures do we have */
+ pci_mmcfg_config_num = 0;
+ i = size - sizeof(struct acpi_table_mcfg);
+ while (i >= sizeof(struct acpi_table_mcfg_config)) {
+ ++pci_mmcfg_config_num;
+ i -= sizeof(struct acpi_table_mcfg_config);
+ };
+ if (pci_mmcfg_config_num == 0) {
+ printk(KERN_ERR PREFIX "MMCONFIG has no entries\n");
return -ENODEV;
}
- pci_mmcfg_base_addr = mcfg->base_address;
+ config_size = pci_mmcfg_config_num * sizeof(*pci_mmcfg_config);
+ pci_mmcfg_config = kmalloc(config_size, GFP_KERNEL);
+ if (!pci_mmcfg_config) {
+ printk(KERN_WARNING PREFIX
+ "No memory for MCFG config tables\n");
+ return -ENOMEM;
+ }
+
+ memcpy(pci_mmcfg_config, &mcfg->config, config_size);
+ for (i = 0; i < pci_mmcfg_config_num; ++i) {
+ if (mcfg->config[i].base_reserved) {
+ printk(KERN_ERR PREFIX
+ "MMCONFIG not in low 4GB of memory\n");
+ return -ENODEV;
+ }
+ }
return 0;
}
-#else
-#define acpi_parse_mcfg NULL
-#endif /* !CONFIG_PCI_MMCONFIG */
+#endif /* CONFIG_PCI_MMCONFIG */
#ifdef CONFIG_X86_LOCAL_APIC
static int __init
@@ -1139,7 +1165,6 @@ int __init acpi_boot_init(void)
acpi_process_madt();
acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
- acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
return 0;
}