2N/A/* Mmap management. */
2N/A/*
2N/A * GRUB -- GRand Unified Bootloader
2N/A * Copyright (C) 2009 Free Software Foundation, Inc.
2N/A * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.
2N/A *
2N/A * GRUB is free software: you can redistribute it and/or modify
2N/A * it under the terms of the GNU General Public License as published by
2N/A * the Free Software Foundation, either version 3 of the License, or
2N/A * (at your option) any later version.
2N/A *
2N/A * GRUB is distributed in the hope that it will be useful,
2N/A * but WITHOUT ANY WARRANTY; without even the implied warranty of
2N/A * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2N/A * GNU General Public License for more details.
2N/A *
2N/A * You should have received a copy of the GNU General Public License
2N/A * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
2N/A */
2N/A
2N/A#include <grub/machine/memory.h>
2N/A#include <grub/memory.h>
2N/A#include <grub/err.h>
2N/A#include <grub/efi/api.h>
2N/A#include <grub/efi/efi.h>
2N/A#include <grub/mm.h>
2N/A#include <grub/misc.h>
2N/A
2N/A#define NEXT_MEMORY_DESCRIPTOR(desc, size) \
2N/A ((grub_efi_memory_descriptor_t *) ((char *) (desc) + (size)))
2N/A
2N/Agrub_err_t
2N/Agrub_machine_mmap_iterate (grub_memory_hook_t hook)
2N/A{
2N/A grub_efi_uintn_t mmap_size = 0;
2N/A grub_efi_memory_descriptor_t *map_buf = 0;
2N/A grub_efi_uintn_t map_key = 0;
2N/A grub_efi_uintn_t desc_size = 0;
2N/A grub_efi_uint32_t desc_version = 0;
2N/A grub_efi_memory_descriptor_t *desc;
2N/A
2N/A if (grub_efi_get_memory_map (&mmap_size, map_buf,
2N/A &map_key, &desc_size,
2N/A &desc_version) < 0)
2N/A return grub_errno;
2N/A
2N/A map_buf = grub_malloc (mmap_size);
2N/A if (! map_buf)
2N/A return grub_errno;
2N/A
2N/A if (grub_efi_get_memory_map (&mmap_size, map_buf,
2N/A &map_key, &desc_size,
2N/A &desc_version) <= 0)
2N/A {
2N/A grub_free (map_buf);
2N/A return grub_errno;
2N/A }
2N/A
2N/A for (desc = map_buf;
2N/A desc < NEXT_MEMORY_DESCRIPTOR (map_buf, mmap_size);
2N/A desc = NEXT_MEMORY_DESCRIPTOR (desc, desc_size))
2N/A {
2N/A grub_dprintf ("mmap", "EFI memory region 0x%llx-0x%llx: %d\n",
2N/A (unsigned long long) desc->physical_start,
2N/A (unsigned long long) desc->physical_start
2N/A + desc->num_pages * 4096, desc->type);
2N/A switch (desc->type)
2N/A {
2N/A case GRUB_EFI_RUNTIME_SERVICES_CODE:
2N/A hook (desc->physical_start, desc->num_pages * 4096,
2N/A GRUB_MEMORY_CODE);
2N/A break;
2N/A
2N/A case GRUB_EFI_UNUSABLE_MEMORY:
2N/A hook (desc->physical_start, desc->num_pages * 4096,
2N/A GRUB_MEMORY_BADRAM);
2N/A break;
2N/A
2N/A case GRUB_EFI_RUNTIME_SERVICES_DATA:
2N/A hook (desc->physical_start, desc->num_pages * 4096,
2N/A GRUB_MEMORY_DATA);
2N/A break;
2N/A
2N/A default:
2N/A grub_printf ("Unknown memory type %d, considering reserved\n",
2N/A desc->type);
2N/A
2N/A case GRUB_EFI_RESERVED_MEMORY_TYPE:
2N/A case GRUB_EFI_MEMORY_MAPPED_IO:
2N/A case GRUB_EFI_MEMORY_MAPPED_IO_PORT_SPACE:
2N/A case GRUB_EFI_PAL_CODE:
2N/A hook (desc->physical_start, desc->num_pages * 4096,
2N/A GRUB_MEMORY_RESERVED);
2N/A break;
2N/A
2N/A case GRUB_EFI_LOADER_CODE:
2N/A case GRUB_EFI_LOADER_DATA:
2N/A case GRUB_EFI_BOOT_SERVICES_CODE:
2N/A case GRUB_EFI_BOOT_SERVICES_DATA:
2N/A case GRUB_EFI_CONVENTIONAL_MEMORY:
2N/A hook (desc->physical_start, desc->num_pages * 4096,
2N/A GRUB_MEMORY_AVAILABLE);
2N/A break;
2N/A
2N/A case GRUB_EFI_ACPI_RECLAIM_MEMORY:
2N/A hook (desc->physical_start, desc->num_pages * 4096,
2N/A GRUB_MEMORY_ACPI);
2N/A break;
2N/A
2N/A case GRUB_EFI_ACPI_MEMORY_NVS:
2N/A hook (desc->physical_start, desc->num_pages * 4096,
2N/A GRUB_MEMORY_NVS);
2N/A break;
2N/A }
2N/A }
2N/A
2N/A return GRUB_ERR_NONE;
2N/A}
2N/A
2N/Astatic inline grub_efi_memory_type_t
2N/Amake_efi_memtype (int type)
2N/A{
2N/A switch (type)
2N/A {
2N/A case GRUB_MEMORY_CODE:
2N/A return GRUB_EFI_RUNTIME_SERVICES_CODE;
2N/A
2N/A /* No way to remove a chunk of memory from EFI mmap.
2N/A So mark it as unusable. */
2N/A case GRUB_MEMORY_HOLE:
2N/A case GRUB_MEMORY_RESERVED:
2N/A return GRUB_EFI_UNUSABLE_MEMORY;
2N/A
2N/A case GRUB_MEMORY_AVAILABLE:
2N/A return GRUB_EFI_CONVENTIONAL_MEMORY;
2N/A
2N/A case GRUB_MEMORY_ACPI:
2N/A return GRUB_EFI_ACPI_RECLAIM_MEMORY;
2N/A
2N/A case GRUB_MEMORY_NVS:
2N/A return GRUB_EFI_ACPI_MEMORY_NVS;
2N/A }
2N/A
2N/A return GRUB_EFI_UNUSABLE_MEMORY;
2N/A}
2N/A
2N/Astruct overlay
2N/A{
2N/A struct overlay *next;
2N/A grub_efi_physical_address_t address;
2N/A grub_efi_uintn_t pages;
2N/A int handle;
2N/A};
2N/A
2N/Astatic struct overlay *overlays = 0;
2N/Astatic int curhandle = 1;
2N/A
2N/Aint
2N/Agrub_mmap_register (grub_uint64_t start, grub_uint64_t size, int type)
2N/A{
2N/A grub_uint64_t end = start + size;
2N/A grub_efi_physical_address_t address;
2N/A grub_efi_boot_services_t *b;
2N/A grub_efi_uintn_t pages;
2N/A grub_efi_status_t status;
2N/A struct overlay *curover;
2N/A
2N/A curover = (struct overlay *) grub_malloc (sizeof (struct overlay));
2N/A if (! curover)
2N/A return 0;
2N/A
2N/A b = grub_efi_system_table->boot_services;
2N/A address = start & (~0x3ffULL);
2N/A pages = (end - address + 0x3ff) >> 12;
2N/A status = efi_call_2 (b->free_pages, address, pages);
2N/A if (status != GRUB_EFI_SUCCESS && status != GRUB_EFI_NOT_FOUND)
2N/A {
2N/A grub_free (curover);
2N/A return 0;
2N/A }
2N/A status = efi_call_4 (b->allocate_pages, GRUB_EFI_ALLOCATE_ADDRESS,
2N/A make_efi_memtype (type), pages, &address);
2N/A if (status != GRUB_EFI_SUCCESS)
2N/A {
2N/A grub_free (curover);
2N/A return 0;
2N/A }
2N/A curover->next = overlays;
2N/A curover->handle = curhandle++;
2N/A curover->address = address;
2N/A curover->pages = pages;
2N/A overlays = curover;
2N/A
2N/A return curover->handle;
2N/A}
2N/A
2N/Agrub_err_t
2N/Agrub_mmap_unregister (int handle)
2N/A{
2N/A struct overlay *curover, *prevover;
2N/A grub_efi_boot_services_t *b;
2N/A
2N/A b = grub_efi_system_table->boot_services;
2N/A
2N/A
2N/A for (curover = overlays, prevover = 0; curover;
2N/A prevover = curover, curover = curover->next)
2N/A {
2N/A if (curover->handle == handle)
2N/A {
2N/A efi_call_2 (b->free_pages, curover->address, curover->pages);
2N/A if (prevover != 0)
2N/A prevover->next = curover->next;
2N/A else
2N/A overlays = curover->next;
2N/A grub_free (curover);
2N/A return GRUB_ERR_NONE;
2N/A }
2N/A }
2N/A return grub_error (GRUB_ERR_BAD_ARGUMENT, "handle %d not found", handle);
2N/A}
2N/A
2N/A/* Result is always page-aligned. */
2N/Avoid *
2N/Agrub_mmap_malign_and_register (grub_uint64_t align __attribute__ ((unused)),
2N/A grub_uint64_t size,
2N/A int *handle, int type,
2N/A int flags __attribute__ ((unused)))
2N/A{
2N/A grub_efi_physical_address_t address;
2N/A grub_efi_boot_services_t *b;
2N/A grub_efi_uintn_t pages;
2N/A grub_efi_status_t status;
2N/A struct overlay *curover;
2N/A grub_efi_allocate_type_t atype;
2N/A
2N/A curover = (struct overlay *) grub_malloc (sizeof (struct overlay));
2N/A if (! curover)
2N/A return 0;
2N/A
2N/A b = grub_efi_system_table->boot_services;
2N/A
2N/A address = 0xffffffff;
2N/A
2N/A#if GRUB_TARGET_SIZEOF_VOID_P < 8
2N/A /* Limit the memory access to less than 4GB for 32-bit platforms. */
2N/A atype = GRUB_EFI_ALLOCATE_MAX_ADDRESS;
2N/A#else
2N/A atype = GRUB_EFI_ALLOCATE_ANY_PAGES;
2N/A#endif
2N/A
2N/A pages = (size + 0x3ff) >> 12;
2N/A status = efi_call_4 (b->allocate_pages, atype,
2N/A make_efi_memtype (type), pages, &address);
2N/A if (status != GRUB_EFI_SUCCESS)
2N/A {
2N/A grub_free (curover);
2N/A return 0;
2N/A }
2N/A
2N/A if (address == 0)
2N/A {
2N/A /* Uggh, the address 0 was allocated... This is too annoying,
2N/A so reallocate another one. */
2N/A address = 0xffffffff;
2N/A status = efi_call_4 (b->allocate_pages, atype,
2N/A make_efi_memtype (type), pages, &address);
2N/A grub_efi_free_pages (0, pages);
2N/A if (status != GRUB_EFI_SUCCESS)
2N/A return 0;
2N/A }
2N/A
2N/A curover->next = overlays;
2N/A curover->handle = curhandle++;
2N/A curover->address = address;
2N/A curover->pages = pages;
2N/A overlays = curover;
2N/A *handle = curover->handle;
2N/A
2N/A return (void *) (grub_addr_t) curover->address;
2N/A}
2N/A
2N/Avoid
2N/Agrub_mmap_free_and_unregister (int handle)
2N/A{
2N/A grub_mmap_unregister (handle);
2N/A}