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-rw-r--r--arch/ia64/kernel/efi.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
index 1291db581721..f72ea6aebcb1 100644
--- a/arch/ia64/kernel/efi.c
+++ b/arch/ia64/kernel/efi.c
@@ -923,3 +923,90 @@ efi_memmap_init(unsigned long *s, unsigned long *e)
923 *s = (u64)kern_memmap; 923 *s = (u64)kern_memmap;
924 *e = (u64)++k; 924 *e = (u64)++k;
925} 925}
926
927void
928efi_initialize_iomem_resources(struct resource *code_resource,
929 struct resource *data_resource)
930{
931 struct resource *res;
932 void *efi_map_start, *efi_map_end, *p;
933 efi_memory_desc_t *md;
934 u64 efi_desc_size;
935 char *name;
936 unsigned long flags;
937
938 efi_map_start = __va(ia64_boot_param->efi_memmap);
939 efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size;
940 efi_desc_size = ia64_boot_param->efi_memdesc_size;
941
942 res = NULL;
943
944 for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
945 md = p;
946
947 if (md->num_pages == 0) /* should not happen */
948 continue;
949
950 flags = IORESOURCE_MEM;
951 switch (md->type) {
952
953 case EFI_MEMORY_MAPPED_IO:
954 case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
955 continue;
956
957 case EFI_LOADER_CODE:
958 case EFI_LOADER_DATA:
959 case EFI_BOOT_SERVICES_DATA:
960 case EFI_BOOT_SERVICES_CODE:
961 case EFI_CONVENTIONAL_MEMORY:
962 if (md->attribute & EFI_MEMORY_WP) {
963 name = "System ROM";
964 flags |= IORESOURCE_READONLY;
965 } else {
966 name = "System RAM";
967 }
968 break;
969
970 case EFI_ACPI_MEMORY_NVS:
971 name = "ACPI Non-volatile Storage";
972 flags |= IORESOURCE_BUSY;
973 break;
974
975 case EFI_UNUSABLE_MEMORY:
976 name = "reserved";
977 flags |= IORESOURCE_BUSY | IORESOURCE_DISABLED;
978 break;
979
980 case EFI_RESERVED_TYPE:
981 case EFI_RUNTIME_SERVICES_CODE:
982 case EFI_RUNTIME_SERVICES_DATA:
983 case EFI_ACPI_RECLAIM_MEMORY:
984 default:
985 name = "reserved";
986 flags |= IORESOURCE_BUSY;
987 break;
988 }
989
990 if ((res = kcalloc(1, sizeof(struct resource), GFP_KERNEL)) == NULL) {
991 printk(KERN_ERR "failed to alocate resource for iomem\n");
992 return;
993 }
994
995 res->name = name;
996 res->start = md->phys_addr;
997 res->end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1;
998 res->flags = flags;
999
1000 if (insert_resource(&iomem_resource, res) < 0)
1001 kfree(res);
1002 else {
1003 /*
1004 * We don't know which region contains
1005 * kernel data so we try it repeatedly and
1006 * let the resource manager test it.
1007 */
1008 insert_resource(res, code_resource);
1009 insert_resource(res, data_resource);
1010 }
1011 }
1012}