Heinrich Schuchardt | 43d2799 | 2018-03-03 15:29:04 +0100 | [diff] [blame] | 1 | /* |
| 2 | * efi_selftest_pos |
| 3 | * |
| 4 | * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de> |
| 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0+ |
| 7 | * |
| 8 | * Test the EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL. |
| 9 | * |
| 10 | * The following services are tested: |
| 11 | * OutputString, TestString, SetAttribute. |
| 12 | */ |
| 13 | |
| 14 | #include <efi_selftest.h> |
Heinrich Schuchardt | 0a9b9e5 | 2018-03-12 19:52:25 +0100 | [diff] [blame] | 15 | #include <linux/libfdt.h> |
Heinrich Schuchardt | 43d2799 | 2018-03-03 15:29:04 +0100 | [diff] [blame] | 16 | |
| 17 | static struct efi_boot_services *boottime; |
| 18 | static const char *fdt; |
| 19 | |
| 20 | /* This should be sufficent for */ |
| 21 | #define BUFFERSIZE 0x100000 |
| 22 | |
| 23 | static efi_guid_t fdt_guid = EFI_FDT_GUID; |
| 24 | |
| 25 | /* |
| 26 | * Convert FDT value to host endianness. |
| 27 | * |
| 28 | * @val FDT value |
| 29 | * @return converted value |
| 30 | */ |
| 31 | static uint32_t f2h(fdt32_t val) |
| 32 | { |
| 33 | char *buf = (char *)&val; |
| 34 | char i; |
| 35 | |
| 36 | #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
| 37 | /* Swap the bytes */ |
| 38 | i = buf[0]; buf[0] = buf[3]; buf[3] = i; |
| 39 | i = buf[1]; buf[1] = buf[2]; buf[2] = i; |
| 40 | #endif |
| 41 | return *(uint32_t *)buf; |
| 42 | } |
| 43 | |
| 44 | /* |
| 45 | * Return the value of a property of the FDT root node. |
| 46 | * |
| 47 | * @name name of the property |
| 48 | * @return value of the property |
| 49 | */ |
| 50 | static char *get_property(const u16 *property) |
| 51 | { |
| 52 | struct fdt_header *header = (struct fdt_header *)fdt; |
| 53 | const fdt32_t *pos; |
| 54 | const char *strings; |
| 55 | |
| 56 | if (!header) |
| 57 | return NULL; |
| 58 | |
| 59 | if (f2h(header->magic) != FDT_MAGIC) { |
| 60 | printf("Wrong magic\n"); |
| 61 | return NULL; |
| 62 | } |
| 63 | |
| 64 | pos = (fdt32_t *)(fdt + f2h(header->off_dt_struct)); |
| 65 | strings = fdt + f2h(header->off_dt_strings); |
| 66 | |
| 67 | for (;;) { |
| 68 | switch (f2h(pos[0])) { |
| 69 | case FDT_BEGIN_NODE: { |
| 70 | char *c = (char *)&pos[1]; |
| 71 | size_t i; |
| 72 | |
| 73 | for (i = 0; c[i]; ++i) |
| 74 | ; |
| 75 | pos = &pos[2 + (i >> 2)]; |
| 76 | break; |
| 77 | } |
| 78 | case FDT_PROP: { |
| 79 | struct fdt_property *prop = (struct fdt_property *)pos; |
| 80 | const char *label = &strings[f2h(prop->nameoff)]; |
| 81 | efi_status_t ret; |
| 82 | |
| 83 | /* Check if this is the property to be returned */ |
| 84 | if (!efi_st_strcmp_16_8(property, label)) { |
| 85 | char *str; |
| 86 | efi_uintn_t len = f2h(prop->len); |
| 87 | |
| 88 | if (!len) |
| 89 | return NULL; |
| 90 | /* |
| 91 | * The string might not be 0 terminated. |
| 92 | * It is safer to make a copy. |
| 93 | */ |
| 94 | ret = boottime->allocate_pool( |
| 95 | EFI_LOADER_DATA, len + 1, |
| 96 | (void **)&str); |
| 97 | if (ret != EFI_SUCCESS) { |
| 98 | efi_st_printf("AllocatePool failed\n"); |
| 99 | return NULL; |
| 100 | } |
| 101 | boottime->copy_mem(str, &pos[3], len); |
| 102 | str[len] = 0; |
| 103 | |
| 104 | return str; |
| 105 | } |
| 106 | |
| 107 | pos = &pos[3 + ((f2h(prop->len) + 3) >> 2)]; |
| 108 | break; |
| 109 | } |
| 110 | case FDT_NOP: |
| 111 | pos = &pos[1]; |
| 112 | break; |
| 113 | default: |
| 114 | return NULL; |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | /* |
| 120 | * Setup unit test. |
| 121 | * |
| 122 | * @handle: handle of the loaded image |
| 123 | * @systable: system table |
| 124 | * @return: EFI_ST_SUCCESS for success |
| 125 | */ |
| 126 | static int setup(const efi_handle_t img_handle, |
| 127 | const struct efi_system_table *systable) |
| 128 | { |
| 129 | efi_uintn_t i; |
| 130 | |
| 131 | boottime = systable->boottime; |
| 132 | |
| 133 | /* Find configuration tables */ |
| 134 | for (i = 0; i < systable->nr_tables; ++i) { |
| 135 | if (!efi_st_memcmp(&systable->tables[i].guid, &fdt_guid, |
| 136 | sizeof(efi_guid_t))) |
| 137 | fdt = systable->tables[i].table; |
| 138 | } |
| 139 | if (!fdt) { |
| 140 | efi_st_error("Missing device tree\n"); |
| 141 | return EFI_ST_FAILURE; |
| 142 | } |
| 143 | |
| 144 | return EFI_ST_SUCCESS; |
| 145 | } |
| 146 | |
| 147 | /* |
| 148 | * Execute unit test. |
| 149 | * |
| 150 | * @return: EFI_ST_SUCCESS for success |
| 151 | */ |
| 152 | static int execute(void) |
| 153 | { |
| 154 | char *str; |
| 155 | efi_status_t ret; |
| 156 | |
| 157 | str = get_property(L"compatible"); |
| 158 | if (str) { |
| 159 | efi_st_printf("compatible: %s\n", str); |
| 160 | ret = boottime->free_pool(str); |
| 161 | if (ret != EFI_SUCCESS) { |
| 162 | efi_st_error("FreePool failed\n"); |
| 163 | return EFI_ST_FAILURE; |
| 164 | } |
| 165 | } else { |
| 166 | efi_st_printf("Missing property 'compatible'\n"); |
| 167 | return EFI_ST_FAILURE; |
| 168 | } |
| 169 | str = get_property(L"serial-number"); |
| 170 | if (str) { |
| 171 | efi_st_printf("serial-number: %s\n", str); |
| 172 | ret = boottime->free_pool(str); |
| 173 | if (ret != EFI_SUCCESS) { |
| 174 | efi_st_error("FreePool failed\n"); |
| 175 | return EFI_ST_FAILURE; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | return EFI_ST_SUCCESS; |
| 180 | } |
| 181 | |
| 182 | EFI_UNIT_TEST(fdt) = { |
| 183 | .name = "device tree", |
| 184 | .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT, |
| 185 | .setup = setup, |
| 186 | .execute = execute, |
| 187 | .on_request = true, |
| 188 | }; |