1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * efi_selftest_rtc
4 *
5 * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
6 *
7 * Test the real time clock runtime services.
8 */
9
10 #include <efi_selftest.h>
11
12 #define EFI_ST_NO_RTC "Could not read real time clock\n"
13 #define EFI_ST_NO_RTC_SET "Could not set real time clock\n"
14
15 static struct efi_runtime_services *runtime;
16
17 /*
18 * Setup unit test.
19 *
20 * @handle: handle of the loaded image
21 * @systable: system table
22 * @return: EFI_ST_SUCCESS for success
23 */
setup(const efi_handle_t handle,const struct efi_system_table * systable)24 static int setup(const efi_handle_t handle,
25 const struct efi_system_table *systable)
26 {
27 runtime = systable->runtime;
28 return EFI_ST_SUCCESS;
29 }
30
31 /*
32 * Execute unit test.
33 *
34 * Read and display current time.
35 * Set a new value and read it back.
36 * Set the real time clock back the current time.
37 *
38 * @return: EFI_ST_SUCCESS for success
39 */
execute(void)40 static int execute(void)
41 {
42 efi_status_t ret;
43 struct efi_time tm_old;
44 #ifdef CONFIG_EFI_SET_TIME
45 struct efi_time tm, tm_new = {
46 .year = 2017,
47 .month = 5,
48 .day = 19,
49 .hour = 13,
50 .minute = 47,
51 .second = 53,
52 };
53 #endif
54
55 /* Display current time */
56 ret = runtime->get_time(&tm_old, NULL);
57 if (ret != EFI_SUCCESS) {
58 efi_st_error(EFI_ST_NO_RTC);
59 return EFI_ST_FAILURE;
60 }
61 efi_st_printf("Time according to real time clock: "
62 "%.4u-%.2u-%.2u %.2u:%.2u:%.2u\n",
63 tm_old.year, tm_old.month, tm_old.day,
64 tm_old.hour, tm_old.minute, tm_old.second);
65 #ifdef CONFIG_EFI_SET_TIME
66 ret = runtime->set_time(&tm_new);
67 if (ret != EFI_SUCCESS) {
68 efi_st_error(EFI_ST_NO_RTC_SET);
69 return EFI_ST_FAILURE;
70 }
71 ret = runtime->get_time(&tm, NULL);
72 if (ret != EFI_SUCCESS) {
73 efi_st_error(EFI_ST_NO_RTC);
74 return EFI_ST_FAILURE;
75 }
76 if (tm.year != tm_new.year ||
77 tm.month != tm_new.month ||
78 tm.day != tm_new.day ||
79 tm.hour != tm_new.hour ||
80 tm.minute != tm_new.minute ||
81 tm.second < tm_new.second ||
82 tm.second > tm_new.second + 2) {
83 efi_st_error(EFI_ST_NO_RTC_SET);
84 return EFI_ST_FAILURE;
85 }
86 /* Set time back to old value */
87 ret = runtime->set_time(&tm_old);
88 if (ret != EFI_SUCCESS) {
89 efi_st_error(EFI_ST_NO_RTC_SET);
90 return EFI_ST_FAILURE;
91 }
92 #endif
93
94 return EFI_ST_SUCCESS;
95 }
96
97 EFI_UNIT_TEST(rtc) = {
98 .name = "real time clock",
99 .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
100 .setup = setup,
101 .execute = execute,
102 };
103