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![Heinrich Schuchardt](/assets/img/avatar_default.png)
The EBBR specification prescribes that we should have either an ACPI table or a device tree but not both. So do not run the device tree unit test on boards with an ACPI table. Hence there is no need any longer to make it 'on request' only. Do not pass $fdtcontroladdr to `bootefi selftest`. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
207 lines
4.2 KiB
C
207 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* efi_selftest_pos
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*
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* Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
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*
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* Test the EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL.
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*
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* The following services are tested:
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* OutputString, TestString, SetAttribute.
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*/
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#include <efi_selftest.h>
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#include <linux/libfdt.h>
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static const struct efi_system_table *systemtab;
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static const struct efi_boot_services *boottime;
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static const char *fdt;
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/* This should be sufficient for */
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#define BUFFERSIZE 0x100000
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static const efi_guid_t fdt_guid = EFI_FDT_GUID;
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static const efi_guid_t acpi_guid = EFI_ACPI_TABLE_GUID;
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/*
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* Convert FDT value to host endianness.
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*
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* @val FDT value
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* @return converted value
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*/
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static uint32_t f2h(fdt32_t val)
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{
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char *buf = (char *)&val;
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char i;
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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/* Swap the bytes */
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i = buf[0]; buf[0] = buf[3]; buf[3] = i;
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i = buf[1]; buf[1] = buf[2]; buf[2] = i;
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#endif
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return *(uint32_t *)buf;
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}
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/*
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* Return the value of a property of the FDT root node.
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*
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* @name name of the property
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* @return value of the property
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*/
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static char *get_property(const u16 *property)
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{
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struct fdt_header *header = (struct fdt_header *)fdt;
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const fdt32_t *pos;
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const char *strings;
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if (!header)
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return NULL;
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if (f2h(header->magic) != FDT_MAGIC) {
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printf("Wrong magic\n");
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return NULL;
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}
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pos = (fdt32_t *)(fdt + f2h(header->off_dt_struct));
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strings = fdt + f2h(header->off_dt_strings);
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for (;;) {
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switch (f2h(pos[0])) {
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case FDT_BEGIN_NODE: {
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char *c = (char *)&pos[1];
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size_t i;
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for (i = 0; c[i]; ++i)
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;
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pos = &pos[2 + (i >> 2)];
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break;
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}
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case FDT_PROP: {
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struct fdt_property *prop = (struct fdt_property *)pos;
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const char *label = &strings[f2h(prop->nameoff)];
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efi_status_t ret;
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/* Check if this is the property to be returned */
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if (!efi_st_strcmp_16_8(property, label)) {
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char *str;
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efi_uintn_t len = f2h(prop->len);
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if (!len)
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return NULL;
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/*
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* The string might not be 0 terminated.
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* It is safer to make a copy.
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*/
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ret = boottime->allocate_pool(
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EFI_LOADER_DATA, len + 1,
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(void **)&str);
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if (ret != EFI_SUCCESS) {
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efi_st_printf("AllocatePool failed\n");
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return NULL;
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}
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boottime->copy_mem(str, &pos[3], len);
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str[len] = 0;
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return str;
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}
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pos = &pos[3 + ((f2h(prop->len) + 3) >> 2)];
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break;
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}
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case FDT_NOP:
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pos = &pos[1];
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break;
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default:
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return NULL;
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}
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}
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}
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/**
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* efi_st_get_config_table() - get configuration table
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*
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* @guid: GUID of the configuration table
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* Return: pointer to configuration table or NULL
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*/
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static void *efi_st_get_config_table(const efi_guid_t *guid)
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{
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size_t i;
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for (i = 0; i < systab.nr_tables; i++) {
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if (!guidcmp(guid, &systemtab->tables[i].guid))
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return systemtab->tables[i].table;
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}
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return NULL;
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}
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/*
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* Setup unit test.
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*
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* @handle: handle of the loaded image
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* @systable: system table
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* @return: EFI_ST_SUCCESS for success
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*/
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static int setup(const efi_handle_t img_handle,
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const struct efi_system_table *systable)
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{
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void *acpi;
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systemtab = systable;
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boottime = systable->boottime;
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acpi = efi_st_get_config_table(&acpi_guid);
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fdt = efi_st_get_config_table(&fdt_guid);
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if (!fdt) {
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efi_st_error("Missing device tree\n");
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return EFI_ST_FAILURE;
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}
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if (acpi) {
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efi_st_error("Found ACPI table and device tree\n");
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return EFI_ST_FAILURE;
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}
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return EFI_ST_SUCCESS;
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}
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/*
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* Execute unit test.
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*
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* @return: EFI_ST_SUCCESS for success
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*/
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static int execute(void)
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{
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char *str;
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efi_status_t ret;
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str = get_property(L"compatible");
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if (str) {
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efi_st_printf("compatible: %s\n", str);
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ret = boottime->free_pool(str);
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if (ret != EFI_SUCCESS) {
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efi_st_error("FreePool failed\n");
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return EFI_ST_FAILURE;
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}
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} else {
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efi_st_printf("Missing property 'compatible'\n");
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return EFI_ST_FAILURE;
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}
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str = get_property(L"serial-number");
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if (str) {
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efi_st_printf("serial-number: %s\n", str);
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ret = boottime->free_pool(str);
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if (ret != EFI_SUCCESS) {
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efi_st_error("FreePool failed\n");
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return EFI_ST_FAILURE;
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}
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}
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return EFI_ST_SUCCESS;
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}
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EFI_UNIT_TEST(fdt) = {
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.name = "device tree",
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.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
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.setup = setup,
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.execute = execute,
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};
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