lib/efi_selftest/efi_selftest_mem.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * efi_selftest_memory
   4  *
   5  * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
   6  *
   7  * This unit test checks the following boottime services:
   8  * CopyMem, SetMem, CalculateCrc32
   9  *
  10  * The memory type used for the device tree is checked.
  11  */
  12
  13 #include <efi_selftest.h>
  14
  15 static struct efi_boot_services *boottime;
  16
  17 /**
  18  * setup() - setup unit test
  19  *
  20  * @handle:     handle of the loaded image
  21  * @systable:   system table
  22  * Return:      EFI_ST_SUCCESS for success
  23  */
  24 static int setup(const efi_handle_t handle,
  25                  const struct efi_system_table *systable)
  26 {
  27         boottime = systable->boottime;
  28
  29         return EFI_ST_SUCCESS;
  30 }
  31
  32 /*
  33  * execute() - execute unit test
  34  *
  35  * Return:      EFI_ST_SUCCESS for success
  36  */
  37 static int execute(void)
  38 {
  39         u8 c1[] = "abcdefghijklmnop";
  40         u8 c2[] = "abcdefghijklmnop";
  41         u32 crc32;
  42         efi_status_t ret;
  43
  44         ret = boottime->calculate_crc32(c1, 16, &crc32);
  45         if (ret != EFI_SUCCESS) {
  46                 efi_st_error("CalculateCrc32 failed\n");
  47                 return EFI_ST_FAILURE;
  48         }
  49         if (crc32 != 0x943ac093) {
  50                 efi_st_error("CalculateCrc32 returned wrong value\n");
  51                 return EFI_ST_FAILURE;
  52         }
  53         boottime->copy_mem(&c1[5], &c1[3], 8);
  54         if (memcmp(c1, "abcdedefghijknop", 16)) {
  55                 efi_st_error("CopyMem forward copy failed: %s\n", c1);
  56                 return EFI_ST_FAILURE;
  57         }
  58         boottime->copy_mem(&c2[3], &c2[5], 8);
  59         if (memcmp(c2, "abcfghijklmlmnop", 16)) {
  60                 efi_st_error("CopyMem backward copy failed: %s\n", c2);
  61                 return EFI_ST_FAILURE;
  62         }
  63         boottime->set_mem(&c1[3], 8, 'x');
  64         if (memcmp(c1, "abcxxxxxxxxjknop", 16)) {
  65                 efi_st_error("SetMem failed: %s\n", c1);
  66                 return EFI_ST_FAILURE;
  67         }
  68
  69         return EFI_ST_SUCCESS;
  70 }
  71
  72 EFI_UNIT_TEST(mem) = {
  73         .name = "mem",
  74         .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
  75         .setup = setup,
  76         .execute = execute,
  77 };