Changeset e8d3165e in mainline

Timestamp:

2019-01-01T21:48:25Z (6 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

ca645a2

Parents:

68f1254c

Message:

Treat additional region types as available memory

In order for the ia64 loader to find the memory map area occupied by the
kernel (a.k.a. ram_end), it needs to consider additioanl region types
which also denote available memory (after the call to ExitBootServices).
These are: EfiLoaderCode, EfiLoaderData, EfiBootServicesCode and
EfiBootServicesData. Without this the memory map is incomplete and
contains a big hole that covers the entire area of the loaded image. The
loader then cannot find ram_end and the boot fails. The memory map also
needs to be compacted so that adjacent regions of the same type are not
too small for a successful boot.

File:

• boot/arch/ia64/src/main.c (modified) (1 diff)

boot/arch/ia64/src/main.c

@@ -94 +94 @@
                     cur += md_size) {
                         efi_v1_memdesc_t *md = (efi_v1_memdesc_t *) cur;
+                        memmap_item_t *o = NULL;
+
+                        if (items)
+                                o = &memmap[items - 1];
 
                         switch ((efi_memory_type_t) md->type) {
+                        case EFI_LOADER_CODE:
+                        case EFI_LOADER_DATA:
+                        case EFI_BOOT_SERVICES_CODE:
+                        case EFI_BOOT_SERVICES_DATA:
                         case EFI_CONVENTIONAL_MEMORY:
+                                if (o && o->type == MEMMAP_FREE_MEM &&
+                                    o->base + o->size == md->phys_start) {
+                                        o->size += md->pages * EFI_PAGE_SIZE;
+                                        continue;
+                                }
                                 memmap[items].type = MEMMAP_FREE_MEM;
                                 break;