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Add support for linuxefi

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Matthew Garrett 2012-07-10 11:58:52 -04:00 • committed by Michael Marineau
parent 6cee30ef82
commit 0de7775230
5 changed files with 415 additions and 0 deletions
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32
grub-core/kern/efi/mm.c
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@ -49,6 +49,38 @@ static grub_efi_uintn_t finish_desc_size;
static grub_efi_uint32_t finish_desc_version;
int grub_efi_is_finished = 0;
/* Allocate pages below a specified address */
void *
grub_efi_allocate_pages_max (grub_efi_physical_address_t max,
grub_efi_uintn_t pages)
{
grub_efi_status_t status;
grub_efi_boot_services_t *b;
grub_efi_physical_address_t address = max;
if (max > 0xffffffff)
return 0;
b = grub_efi_system_table->boot_services;
status = efi_call_4 (b->allocate_pages, GRUB_EFI_ALLOCATE_MAX_ADDRESS, GRUB_EFI_LOADER_DATA, pages, &address);
if (status != GRUB_EFI_SUCCESS)
return 0;
if (address == 0)
{
/* Uggh, the address 0 was allocated... This is too annoying,
so reallocate another one. */
address = max;
status = efi_call_4 (b->allocate_pages, GRUB_EFI_ALLOCATE_MAX_ADDRESS, GRUB_EFI_LOADER_DATA, pages, &address);
grub_efi_free_pages (0, pages);
if (status != GRUB_EFI_SUCCESS)
return 0;
}
return (void *) ((grub_addr_t) address);
}
/* Allocate pages. Return the pointer to the first of allocated pages. */
void *
grub_efi_allocate_pages (grub_efi_physical_address_t address,