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u-boot/lib/fdtdec_test.c
Thierry Reding b9aad37591 fdtdec: Support reserved-memory flags 
Reserved memory nodes can have additional flags. Support reading and
writing these flags to ensure that reserved memory nodes can be properly
parsed and emitted.

This converts support for the existing "no-map" flag to avoid extending
the argument list for fdtdec_add_reserved_memory() to excessive length.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2021-10-13 14:18:30 -07:00

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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, &carveout,
"framebuffer", NULL, 0, 0);
}
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,
NULL, NULL, NULL, NULL));
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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