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https://github.com/brain-hackers/u-boot-brain
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![Heinrich Schuchardt](/assets/img/avatar_default.png)
On RISC-V check that the /chosen node has a boot-hartid property. To run the test configure with CONFIG_CMD_BOOTEFI_SELFTEST=y and issue setenv efi_selftest device tree setenv serial# myserial bootefi selftest If the test succeeds, it reports the boot-hartid, e.g. boot-hartid: 1 Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
247 lines
5.3 KiB
C
247 lines
5.3 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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* get_property() - return value of a property of an FDT node
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*
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* A property of the root node or one of its direct children can be
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* retrieved.
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*
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* @property name of the property
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* @node name of the node or NULL for root node
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* @return value of the property
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*/
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static char *get_property(const u16 *property, const u16 *node)
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{
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struct fdt_header *header = (struct fdt_header *)fdt;
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const fdt32_t *end;
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const fdt32_t *pos;
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const char *strings;
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size_t level = 0;
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const char *nodelabel = NULL;
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if (!header) {
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efi_st_error("Missing device tree\n");
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return NULL;
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}
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if (f2h(header->magic) != FDT_MAGIC) {
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efi_st_error("Wrong device tree 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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end = &pos[f2h(header->totalsize) >> 2];
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strings = fdt + f2h(header->off_dt_strings);
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for (; pos < end;) {
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switch (f2h(pos[0])) {
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case FDT_BEGIN_NODE: {
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const char *c = (char *)&pos[1];
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size_t i;
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if (level == 1)
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nodelabel = c;
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++level;
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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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((level == 1 && !node) ||
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(level == 2 && node &&
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!efi_st_strcmp_16_8(node, nodelabel)))) {
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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_error("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;
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break;
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case FDT_END_NODE:
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--level;
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++pos;
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break;
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case FDT_END:
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return NULL;
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default:
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efi_st_error("Invalid device tree token\n");
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return NULL;
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}
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}
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efi_st_error("Missing FDT_END token\n");
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return NULL;
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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", NULL);
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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_error("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", NULL);
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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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str = get_property(L"boot-hartid", L"chosen");
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if (IS_ENABLED(CONFIG_RISCV)) {
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if (str) {
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efi_st_printf("boot-hartid: %u\n",
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f2h(*(fdt32_t *)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_error("boot-hartid not found\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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