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Diffstat (limited to 'arch/i386/kernel/efi.c')
-rw-r--r--arch/i386/kernel/efi.c101
1 files changed, 50 insertions, 51 deletions
diff --git a/arch/i386/kernel/efi.c b/arch/i386/kernel/efi.c
index 385883ea8c1..850648ae830 100644
--- a/arch/i386/kernel/efi.c
+++ b/arch/i386/kernel/efi.c
@@ -233,22 +233,23 @@ void __init efi_map_memmap(void)
{
memmap.map = NULL;
- memmap.map = (efi_memory_desc_t *)
- bt_ioremap((unsigned long) memmap.phys_map,
- (memmap.nr_map * sizeof(efi_memory_desc_t)));
-
+ memmap.map = bt_ioremap((unsigned long) memmap.phys_map,
+ (memmap.nr_map * memmap.desc_size));
if (memmap.map == NULL)
printk(KERN_ERR PFX "Could not remap the EFI memmap!\n");
+
+ memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
}
#if EFI_DEBUG
static void __init print_efi_memmap(void)
{
efi_memory_desc_t *md;
+ void *p;
int i;
- for (i = 0; i < memmap.nr_map; i++) {
- md = &memmap.map[i];
+ for (p = memmap.map, i = 0; p < memmap.map_end; p += memmap.desc_size, i++) {
+ md = p;
printk(KERN_INFO "mem%02u: type=%u, attr=0x%llx, "
"range=[0x%016llx-0x%016llx) (%lluMB)\n",
i, md->type, md->attribute, md->phys_addr,
@@ -271,10 +272,10 @@ void efi_memmap_walk(efi_freemem_callback_t callback, void *arg)
} prev, curr;
efi_memory_desc_t *md;
unsigned long start, end;
- int i;
+ void *p;
- for (i = 0; i < memmap.nr_map; i++) {
- md = &memmap.map[i];
+ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ md = p;
if ((md->num_pages == 0) || (!is_available_memory(md)))
continue;
@@ -325,6 +326,7 @@ void __init efi_init(void)
memmap.phys_map = EFI_MEMMAP;
memmap.nr_map = EFI_MEMMAP_SIZE/EFI_MEMDESC_SIZE;
memmap.desc_version = EFI_MEMDESC_VERSION;
+ memmap.desc_size = EFI_MEMDESC_SIZE;
efi.systab = (efi_system_table_t *)
boot_ioremap((unsigned long) efi_phys.systab,
@@ -428,22 +430,30 @@ void __init efi_init(void)
printk(KERN_ERR PFX "Could not map the runtime service table!\n");
/* Map the EFI memory map for use until paging_init() */
-
- memmap.map = (efi_memory_desc_t *)
- boot_ioremap((unsigned long) EFI_MEMMAP, EFI_MEMMAP_SIZE);
-
+ memmap.map = boot_ioremap((unsigned long) EFI_MEMMAP, EFI_MEMMAP_SIZE);
if (memmap.map == NULL)
printk(KERN_ERR PFX "Could not map the EFI memory map!\n");
- if (EFI_MEMDESC_SIZE != sizeof(efi_memory_desc_t)) {
- printk(KERN_WARNING PFX "Warning! Kernel-defined memdesc doesn't "
- "match the one from EFI!\n");
- }
+ memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
+
#if EFI_DEBUG
print_efi_memmap();
#endif
}
+static inline void __init check_range_for_systab(efi_memory_desc_t *md)
+{
+ if (((unsigned long)md->phys_addr <= (unsigned long)efi_phys.systab) &&
+ ((unsigned long)efi_phys.systab < md->phys_addr +
+ ((unsigned long)md->num_pages << EFI_PAGE_SHIFT))) {
+ unsigned long addr;
+
+ addr = md->virt_addr - md->phys_addr +
+ (unsigned long)efi_phys.systab;
+ efi.systab = (efi_system_table_t *)addr;
+ }
+}
+
/*
* This function will switch the EFI runtime services to virtual mode.
* Essentially, look through the EFI memmap and map every region that
@@ -457,43 +467,32 @@ void __init efi_enter_virtual_mode(void)
{
efi_memory_desc_t *md;
efi_status_t status;
- int i;
+ void *p;
efi.systab = NULL;
- for (i = 0; i < memmap.nr_map; i++) {
- md = &memmap.map[i];
+ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ md = p;
- if (md->attribute & EFI_MEMORY_RUNTIME) {
- md->virt_addr =
- (unsigned long)ioremap(md->phys_addr,
- md->num_pages << EFI_PAGE_SHIFT);
- if (!(unsigned long)md->virt_addr) {
- printk(KERN_ERR PFX "ioremap of 0x%lX failed\n",
- (unsigned long)md->phys_addr);
- }
+ if (!(md->attribute & EFI_MEMORY_RUNTIME))
+ continue;
- if (((unsigned long)md->phys_addr <=
- (unsigned long)efi_phys.systab) &&
- ((unsigned long)efi_phys.systab <
- md->phys_addr +
- ((unsigned long)md->num_pages <<
- EFI_PAGE_SHIFT))) {
- unsigned long addr;
-
- addr = md->virt_addr - md->phys_addr +
- (unsigned long)efi_phys.systab;
- efi.systab = (efi_system_table_t *)addr;
- }
+ md->virt_addr = (unsigned long)ioremap(md->phys_addr,
+ md->num_pages << EFI_PAGE_SHIFT);
+ if (!(unsigned long)md->virt_addr) {
+ printk(KERN_ERR PFX "ioremap of 0x%lX failed\n",
+ (unsigned long)md->phys_addr);
}
+ /* update the virtual address of the EFI system table */
+ check_range_for_systab(md);
}
if (!efi.systab)
BUG();
status = phys_efi_set_virtual_address_map(
- sizeof(efi_memory_desc_t) * memmap.nr_map,
- sizeof(efi_memory_desc_t),
+ memmap.desc_size * memmap.nr_map,
+ memmap.desc_size,
memmap.desc_version,
memmap.phys_map);
@@ -533,10 +532,10 @@ efi_initialize_iomem_resources(struct resource *code_resource,
{
struct resource *res;
efi_memory_desc_t *md;
- int i;
+ void *p;
- for (i = 0; i < memmap.nr_map; i++) {
- md = &memmap.map[i];
+ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ md = p;
if ((md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT)) >
0x100000000ULL)
@@ -613,10 +612,10 @@ efi_initialize_iomem_resources(struct resource *code_resource,
u32 efi_mem_type(unsigned long phys_addr)
{
efi_memory_desc_t *md;
- int i;
+ void *p;
- for (i = 0; i < memmap.nr_map; i++) {
- md = &memmap.map[i];
+ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ md = p;
if ((md->phys_addr <= phys_addr) && (phys_addr <
(md->phys_addr + (md-> num_pages << EFI_PAGE_SHIFT)) ))
return md->type;
@@ -627,10 +626,10 @@ u32 efi_mem_type(unsigned long phys_addr)
u64 efi_mem_attributes(unsigned long phys_addr)
{
efi_memory_desc_t *md;
- int i;
+ void *p;
- for (i = 0; i < memmap.nr_map; i++) {
- md = &memmap.map[i];
+ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ md = p;
if ((md->phys_addr <= phys_addr) && (phys_addr <
(md->phys_addr + (md-> num_pages << EFI_PAGE_SHIFT)) ))
return md->attribute;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-14 20:37:34 +0000