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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Some very basic tests for fdtdec, accessed through test_fdtdec command.
- * They are easiest to use with sandbox.
- *
- * Copyright (c) 2011 The Chromium OS Authors.
- */
- #include <common.h>
- #include <command.h>
- #include <fdtdec.h>
- #include <linux/libfdt.h>
- #include <malloc.h>
- #include <os.h>
- /* The size of our test fdt blob */
- #define FDT_SIZE (16 * 1024)
- #define CHECK(op) ({ \
- int err = op; \
- if (err < 0) { \
- printf("%s: %s: %s\n", __func__, #op, \
- fdt_strerror(err)); \
- return err; \
- } \
- \
- err; \
- })
- #define CHECKVAL(op, expected) ({ \
- int err = op; \
- if (err != expected) { \
- printf("%s: %s: expected %d, but returned %d\n",\
- __func__, #op, expected, err); \
- return err; \
- } \
- \
- err; \
- })
- #define CHECKOK(op) CHECKVAL(op, 0)
- /* maximum number of nodes / aliases to generate */
- #define MAX_NODES 20
- /*
- * Make a test fdt
- *
- * @param fdt Device tree pointer
- * @param size Size of device tree blob
- * @param aliases Specifies alias assignments. Format is a list of items
- * separated by space. Items are #a where
- * # is the alias number
- * a is the node to point to
- * @param nodes Specifies nodes to generate (a=0, b=1), upper case
- * means to create a disabled node
- */
- static int make_fdt(void *fdt, int size, const char *aliases,
- const char *nodes)
- {
- char name[20], value[20];
- const char *s;
- #if defined(DEBUG) && defined(CONFIG_SANDBOX)
- int fd;
- #endif
- CHECK(fdt_create(fdt, size));
- CHECK(fdt_finish_reservemap(fdt));
- CHECK(fdt_begin_node(fdt, ""));
- CHECK(fdt_begin_node(fdt, "aliases"));
- for (s = aliases; *s;) {
- sprintf(name, "i2c%c", *s);
- sprintf(value, "/i2c%d@0", s[1] - 'a');
- CHECK(fdt_property_string(fdt, name, value));
- s += 2 + (s[2] != '\0');
- }
- CHECK(fdt_end_node(fdt));
- for (s = nodes; *s; s++) {
- sprintf(value, "i2c%d@0", (*s & 0xdf) - 'A');
- CHECK(fdt_begin_node(fdt, value));
- CHECK(fdt_property_string(fdt, "compatible",
- fdtdec_get_compatible(COMPAT_UNKNOWN)));
- if (*s <= 'Z')
- CHECK(fdt_property_string(fdt, "status", "disabled"));
- CHECK(fdt_end_node(fdt));
- }
- CHECK(fdt_end_node(fdt));
- CHECK(fdt_finish(fdt));
- CHECK(fdt_pack(fdt));
- #if defined(DEBUG) && defined(CONFIG_SANDBOX)
- fd = os_open("/tmp/fdtdec-text.dtb", OS_O_CREAT | OS_O_WRONLY);
- if (fd == -1) {
- printf("Could not open .dtb file to write\n");
- return -1;
- }
- os_write(fd, fdt, size);
- os_close(fd);
- #endif
- return 0;
- }
- static int run_test(const char *aliases, const char *nodes, const char *expect)
- {
- int list[MAX_NODES];
- const char *s;
- void *blob;
- int i;
- blob = malloc(FDT_SIZE);
- if (!blob) {
- printf("%s: out of memory\n", __func__);
- return 1;
- }
- printf("aliases=%s, nodes=%s, expect=%s: ", aliases, nodes, expect);
- CHECKVAL(make_fdt(blob, FDT_SIZE, aliases, nodes), 0);
- CHECKVAL(fdtdec_find_aliases_for_id(blob, "i2c",
- COMPAT_UNKNOWN,
- list, ARRAY_SIZE(list)), (int)strlen(expect));
- /* Check we got the right ones */
- for (i = 0, s = expect; *s; s++, i++) {
- int want = *s;
- const char *name;
- int got = ' ';
- name = list[i] ? fdt_get_name(blob, list[i], NULL) : NULL;
- if (name)
- got = name[3] + 'a' - '0';
- if (got != want) {
- printf("Position %d: Expected '%c', got '%c' ('%s')\n",
- i, want, got, name);
- return 1;
- }
- }
- printf("pass\n");
- free(blob);
- return 0;
- }
- static int make_fdt_carveout_device(void *fdt, uint32_t na, uint32_t ns)
- {
- const char *basename = "/display";
- struct fdt_memory carveout = {
- #ifdef CONFIG_PHYS_64BIT
- .start = 0x180000000,
- .end = 0x18fffffff,
- #else
- .start = 0x80000000,
- .end = 0x8fffffff,
- #endif
- };
- fdt32_t cells[4], *ptr = cells;
- uint32_t upper, lower;
- fdt_size_t size;
- char name[32];
- int offset;
- /* store one or two address cells */
- upper = upper_32_bits(carveout.start);
- lower = lower_32_bits(carveout.start);
- if (na > 1 && upper > 0)
- snprintf(name, sizeof(name), "%s@%x,%x", basename, upper,
- lower);
- else
- snprintf(name, sizeof(name), "%s@%x", basename, lower);
- if (na > 1)
- *ptr++ = cpu_to_fdt32(upper);
- *ptr++ = cpu_to_fdt32(lower);
- /* store one or two size cells */
- size = carveout.end - carveout.start + 1;
- upper = upper_32_bits(size);
- lower = lower_32_bits(size);
- if (ns > 1)
- *ptr++ = cpu_to_fdt32(upper);
- *ptr++ = cpu_to_fdt32(lower);
- offset = CHECK(fdt_add_subnode(fdt, 0, name + 1));
- CHECK(fdt_setprop(fdt, offset, "reg", cells, (na + ns) * sizeof(*cells)));
- return fdtdec_set_carveout(fdt, name, "memory-region", 0,
- "framebuffer", &carveout);
- }
- static int check_fdt_carveout(void *fdt, uint32_t address_cells,
- uint32_t size_cells)
- {
- #ifdef CONFIG_PHYS_64BIT
- const char *name = "/display@1,80000000";
- const struct fdt_memory expected = {
- .start = 0x180000000,
- .end = 0x18fffffff,
- };
- #else
- const char *name = "/display@80000000";
- const struct fdt_memory expected = {
- .start = 0x80000000,
- .end = 0x8fffffff,
- };
- #endif
- struct fdt_memory carveout;
- printf("carveout: %pap-%pap na=%u ns=%u: ", &expected.start,
- &expected.end, address_cells, size_cells);
- CHECK(fdtdec_get_carveout(fdt, name, "memory-region", 0, &carveout));
- if ((carveout.start != expected.start) ||
- (carveout.end != expected.end)) {
- printf("carveout: %pap-%pap, expected %pap-%pap\n",
- &carveout.start, &carveout.end,
- &expected.start, &expected.end);
- return 1;
- }
- printf("pass\n");
- return 0;
- }
- static int make_fdt_carveout(void *fdt, int size, uint32_t address_cells,
- uint32_t size_cells)
- {
- fdt32_t na = cpu_to_fdt32(address_cells);
- fdt32_t ns = cpu_to_fdt32(size_cells);
- #if defined(DEBUG) && defined(CONFIG_SANDBOX)
- char filename[512];
- int fd;
- #endif
- int err;
- CHECK(fdt_create(fdt, size));
- CHECK(fdt_finish_reservemap(fdt));
- CHECK(fdt_begin_node(fdt, ""));
- CHECK(fdt_property(fdt, "#address-cells", &na, sizeof(na)));
- CHECK(fdt_property(fdt, "#size-cells", &ns, sizeof(ns)));
- CHECK(fdt_end_node(fdt));
- CHECK(fdt_finish(fdt));
- CHECK(fdt_pack(fdt));
- CHECK(fdt_open_into(fdt, fdt, FDT_SIZE));
- err = make_fdt_carveout_device(fdt, address_cells, size_cells);
- #if defined(DEBUG) && defined(CONFIG_SANDBOX)
- snprintf(filename, sizeof(filename), "/tmp/fdtdec-carveout-%u-%u.dtb",
- address_cells, size_cells);
- fd = os_open(filename, OS_O_CREAT | OS_O_WRONLY);
- if (fd < 0) {
- printf("could not open .dtb file to write\n");
- goto out;
- }
- os_write(fd, fdt, size);
- os_close(fd);
- out:
- #endif
- return err;
- }
- static int check_carveout(void)
- {
- void *fdt;
- fdt = malloc(FDT_SIZE);
- if (!fdt) {
- printf("%s: out of memory\n", __func__);
- return 1;
- }
- #ifndef CONFIG_PHYS_64BIT
- CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 1, 1), 0);
- CHECKOK(check_fdt_carveout(fdt, 1, 1));
- CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 1, 2), 0);
- CHECKOK(check_fdt_carveout(fdt, 1, 2));
- #else
- CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 1, 1), -FDT_ERR_BADVALUE);
- CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 1, 2), -FDT_ERR_BADVALUE);
- #endif
- CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 2, 1), 0);
- CHECKOK(check_fdt_carveout(fdt, 2, 1));
- CHECKVAL(make_fdt_carveout(fdt, FDT_SIZE, 2, 2), 0);
- CHECKOK(check_fdt_carveout(fdt, 2, 2));
- free(fdt);
- return 0;
- }
- static int do_test_fdtdec(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
- {
- /* basic tests */
- CHECKOK(run_test("", "", ""));
- CHECKOK(run_test("1e 3d", "", ""));
- /*
- * 'a' represents 0, 'b' represents 1, etc.
- * The first character is the alias number, the second is the node
- * number. So the params mean:
- * 0a 1b : point alias 0 to node 0 (a), alias 1 to node 1(b)
- * ab : to create nodes 0 and 1 (a and b)
- * ab : we expect the function to return two nodes, in
- * the order 0, 1
- */
- CHECKOK(run_test("0a 1b", "ab", "ab"));
- CHECKOK(run_test("0a 1c", "ab", "ab"));
- CHECKOK(run_test("1c", "ab", "ab"));
- CHECKOK(run_test("1b", "ab", "ab"));
- CHECKOK(run_test("0b", "ab", "ba"));
- CHECKOK(run_test("0b 2d", "dbc", "bcd"));
- CHECKOK(run_test("0d 3a 1c 2b", "dbac", "dcba"));
- /* things with holes */
- CHECKOK(run_test("1b 3d", "dbc", "cb d"));
- CHECKOK(run_test("1e 3d", "dbc", "bc d"));
- /* no aliases */
- CHECKOK(run_test("", "dbac", "dbac"));
- /* disabled nodes */
- CHECKOK(run_test("0d 3a 1c 2b", "dBac", "dc a"));
- CHECKOK(run_test("0b 2d", "DBc", "c"));
- CHECKOK(run_test("0b 4d 2c", "DBc", " c"));
- /* conflicting aliases - first one gets it */
- CHECKOK(run_test("2a 1a 0a", "a", " a"));
- CHECKOK(run_test("0a 1a 2a", "a", "a"));
- CHECKOK(check_carveout());
- printf("Test passed\n");
- return 0;
- }
- U_BOOT_CMD(
- test_fdtdec, 3, 1, do_test_fdtdec,
- "test_fdtdec",
- "Run tests for fdtdec library");
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