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Diffstat (limited to 'arch/x86/kernel/e820.c')
-rw-r--r--arch/x86/kernel/e820.c30
1 files changed, 28 insertions, 2 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 9af89078f7b..78e642feac3 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -148,6 +148,9 @@ void __init e820_print_map(char *who)
case E820_NVS:
printk(KERN_CONT "(ACPI NVS)\n");
break;
+ case E820_UNUSABLE:
+ printk("(unusable)\n");
+ break;
default:
printk(KERN_CONT "type %u\n", e820.map[i].type);
break;
@@ -1203,7 +1206,7 @@ static int __init parse_memmap_opt(char *p)
if (!p)
return -EINVAL;
- if (!strcmp(p, "exactmap")) {
+ if (!strncmp(p, "exactmap", 8)) {
#ifdef CONFIG_CRASH_DUMP
/*
* If we are doing a crash dump, we still need to know
@@ -1260,6 +1263,7 @@ static inline const char *e820_type_to_string(int e820_type)
case E820_RAM: return "System RAM";
case E820_ACPI: return "ACPI Tables";
case E820_NVS: return "ACPI Non-volatile Storage";
+ case E820_UNUSABLE: return "Unusable memory";
default: return "reserved";
}
}
@@ -1267,6 +1271,7 @@ static inline const char *e820_type_to_string(int e820_type)
/*
* Mark e820 reserved areas as busy for the resource manager.
*/
+static struct resource __initdata *e820_res;
void __init e820_reserve_resources(void)
{
int i;
@@ -1274,6 +1279,7 @@ void __init e820_reserve_resources(void)
u64 end;
res = alloc_bootmem_low(sizeof(struct resource) * e820.nr_map);
+ e820_res = res;
for (i = 0; i < e820.nr_map; i++) {
end = e820.map[i].addr + e820.map[i].size - 1;
#ifndef CONFIG_RESOURCES_64BIT
@@ -1287,7 +1293,14 @@ void __init e820_reserve_resources(void)
res->end = end;
res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
- insert_resource(&iomem_resource, res);
+
+ /*
+ * don't register the region that could be conflicted with
+ * pci device BAR resource and insert them later in
+ * pcibios_resource_survey()
+ */
+ if (e820.map[i].type != E820_RESERVED || res->start < (1ULL<<20))
+ insert_resource(&iomem_resource, res);
res++;
}
@@ -1299,6 +1312,19 @@ void __init e820_reserve_resources(void)
}
}
+void __init e820_reserve_resources_late(void)
+{
+ int i;
+ struct resource *res;
+
+ res = e820_res;
+ for (i = 0; i < e820.nr_map; i++) {
+ if (!res->parent && res->end)
+ reserve_region_with_split(&iomem_resource, res->start, res->end, res->name);
+ res++;
+ }
+}
+
char *__init default_machine_specific_memory_setup(void)
{
char *who = "BIOS-e820";