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efi: refactor grub_efi_allocate_pages

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Expose a new function, grub_efi_allocate_pages_real(), making it possible
to specify allocation type and memory type as supported by the UEFI
AllocatePages boot service.

Make grub_efi_allocate_pages() a consumer of the new function,
maintaining its old functionality.

Also delete some left-around #if 1/#else blocks in the affected
functions.

Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Leif Lindholm 2017-08-03 11:04:23 +01:00 committed by Vincent Batts
parent 184d71d527
commit 22619f1593
2 changed files with 29 additions and 22 deletions
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46
grub-core/kern/efi/mm.c
View file

@ -83,36 +83,20 @@ grub_efi_allocate_pages_max (grub_efi_physical_address_t max,
/* Allocate pages. Return the pointer to the first of allocated pages. */
void *
grub_efi_allocate_pages (grub_efi_physical_address_t address,
grub_efi_uintn_t pages)
grub_efi_allocate_pages_real (grub_efi_physical_address_t address,
grub_efi_uintn_t pages,
grub_efi_allocate_type_t alloctype,
grub_efi_memory_type_t memtype)
{
grub_efi_allocate_type_t type;
grub_efi_status_t status;
grub_efi_boot_services_t *b;
#if 1
/* Limit the memory access to less than 4GB for 32-bit platforms. */
if (address > GRUB_EFI_MAX_USABLE_ADDRESS)
return 0;
#endif
#if 1
if (address == 0)
{
type = GRUB_EFI_ALLOCATE_MAX_ADDRESS;
address = GRUB_EFI_MAX_USABLE_ADDRESS;
}
else
type = GRUB_EFI_ALLOCATE_ADDRESS;
#else
if (address == 0)
type = GRUB_EFI_ALLOCATE_ANY_PAGES;
else
type = GRUB_EFI_ALLOCATE_ADDRESS;
#endif
b = grub_efi_system_table->boot_services;
status = efi_call_4 (b->allocate_pages, type, GRUB_EFI_LOADER_DATA, pages, &address);
status = efi_call_4 (b->allocate_pages, alloctype, memtype, pages, &address);
if (status != GRUB_EFI_SUCCESS)
return 0;
@ -121,7 +105,7 @@ grub_efi_allocate_pages (grub_efi_physical_address_t address,
/* Uggh, the address 0 was allocated... This is too annoying,
so reallocate another one. */
address = GRUB_EFI_MAX_USABLE_ADDRESS;
status = efi_call_4 (b->allocate_pages, type, GRUB_EFI_LOADER_DATA, pages, &address);
status = efi_call_4 (b->allocate_pages, alloctype, memtype, pages, &address);
grub_efi_free_pages (0, pages);
if (status != GRUB_EFI_SUCCESS)
return 0;
@ -130,6 +114,24 @@ grub_efi_allocate_pages (grub_efi_physical_address_t address,
return (void *) ((grub_addr_t) address);
}
void *
grub_efi_allocate_pages (grub_efi_physical_address_t address,
grub_efi_uintn_t pages)
{
grub_efi_allocate_type_t alloctype;
if (address == 0)
{
alloctype = GRUB_EFI_ALLOCATE_MAX_ADDRESS;
address = GRUB_EFI_MAX_USABLE_ADDRESS;
}
else
alloctype = GRUB_EFI_ALLOCATE_ADDRESS;
return grub_efi_allocate_pages_real (address, pages, alloctype,
GRUB_EFI_LOADER_DATA);
}
/* Free pages starting from ADDRESS. */
void
grub_efi_free_pages (grub_efi_physical_address_t address,

5
include/grub/efi/efi.h
View file

@ -38,6 +38,11 @@ void *EXPORT_FUNC(grub_efi_open_protocol) (grub_efi_handle_t handle,
int EXPORT_FUNC(grub_efi_set_text_mode) (int on);
void EXPORT_FUNC(grub_efi_stall) (grub_efi_uintn_t microseconds);
void *
EXPORT_FUNC(grub_efi_allocate_pages_real) (grub_efi_physical_address_t address,
grub_efi_uintn_t pages,
grub_efi_allocate_type_t alloctype,
grub_efi_memory_type_t memtype);
void *
EXPORT_FUNC(grub_efi_allocate_pages) (grub_efi_physical_address_t address,
grub_efi_uintn_t pages);
void *