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u-boot/cmd/fdt.c
Tom Warren 0688b758a2 fdt: Fix 'system' command 
'fdt systemsetup' wasn't working, due to the fact that the 'set' command
was being parsed in do_fdt() by only testing for the leading 's' instead
of "se", which kept the "sys" test further down from executing. Changed
to test for "se" instead, now 'fdt systemsetup' works (to test the
ft_system_setup proc w/o having to boot a kernel).

Signed-off-by: Tom Warren <twarren@nvidia.com>
2020-04-16 08:07:58 -06:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2007
* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
* Based on code written by:
* Pantelis Antoniou <pantelis.antoniou@gmail.com> and
* Matthew McClintock <msm@freescale.com>
*/
#include <common.h>
#include <command.h>
#include <env.h>
#include <linux/ctype.h>
#include <linux/types.h>
#include <asm/global_data.h>
#include <linux/libfdt.h>
#include <fdt_support.h>
#include <mapmem.h>
#include <asm/io.h>
#define MAX_LEVEL 32 /* how deeply nested we will go */
#define SCRATCHPAD 1024 /* bytes of scratchpad memory */
#define CMD_FDT_MAX_DUMP 64
/*
* Global data (for the gd->bd)
*/
DECLARE_GLOBAL_DATA_PTR;
static int fdt_valid(struct fdt_header **blobp);
static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
static int fdt_print(const char *pathp, char *prop, int depth);
static int is_printable_string(const void *data, int len);
/*
* The working_fdt points to our working flattened device tree.
*/
struct fdt_header *working_fdt;
void set_working_fdt_addr(ulong addr)
{
void *buf;
buf = map_sysmem(addr, 0);
working_fdt = buf;
env_set_hex("fdtaddr", addr);
}
/*
* Get a value from the fdt and format it to be set in the environment
*/
static int fdt_value_env_set(const void *nodep, int len, const char *var)
{
if (is_printable_string(nodep, len))
env_set(var, (void *)nodep);
else if (len == 4) {
char buf[11];
sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
env_set(var, buf);
} else if (len%4 == 0 && len <= 20) {
/* Needed to print things like sha1 hashes. */
char buf[41];
int i;
for (i = 0; i < len; i += sizeof(unsigned int))
sprintf(buf + (i * 2), "%08x",
*(unsigned int *)(nodep + i));
env_set(var, buf);
} else {
printf("error: unprintable value\n");
return 1;
}
return 0;
}
static const char * const fdt_member_table[] = {
"magic",
"totalsize",
"off_dt_struct",
"off_dt_strings",
"off_mem_rsvmap",
"version",
"last_comp_version",
"boot_cpuid_phys",
"size_dt_strings",
"size_dt_struct",
};
static int fdt_get_header_value(int argc, char * const argv[])
{
fdt32_t *fdtp = (fdt32_t *)working_fdt;
ulong val;
int i;
if (argv[2][0] != 'g')
return CMD_RET_FAILURE;
for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
if (strcmp(fdt_member_table[i], argv[4]))
continue;
val = fdt32_to_cpu(fdtp[i]);
env_set_hex(argv[3], val);
return CMD_RET_SUCCESS;
}
return CMD_RET_FAILURE;
}
/*
* Flattened Device Tree command, see the help for parameter definitions.
*/
static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
if (argc < 2)
return CMD_RET_USAGE;
/*
* Set the address of the fdt
*/
if (strncmp(argv[1], "ad", 2) == 0) {
unsigned long addr;
int control = 0;
struct fdt_header *blob;
/*
* Set the address [and length] of the fdt.
*/
argc -= 2;
argv += 2;
/* Temporary #ifdef - some archs don't have fdt_blob yet */
#ifdef CONFIG_OF_CONTROL
if (argc && !strcmp(*argv, "-c")) {
control = 1;
argc--;
argv++;
}
#endif
if (argc == 0) {
if (control)
blob = (struct fdt_header *)gd->fdt_blob;
else
blob = working_fdt;
if (!blob || !fdt_valid(&blob))
return 1;
printf("The address of the fdt is %#08lx\n",
control ? (ulong)map_to_sysmem(blob) :
env_get_hex("fdtaddr", 0));
return 0;
}
addr = simple_strtoul(argv[0], NULL, 16);
blob = map_sysmem(addr, 0);
if (!fdt_valid(&blob))
return 1;
if (control)
gd->fdt_blob = blob;
else
set_working_fdt_addr(addr);
if (argc >= 2) {
int len;
int err;
/*
* Optional new length
*/
len = simple_strtoul(argv[1], NULL, 16);
if (len < fdt_totalsize(blob)) {
printf ("New length %d < existing length %d, "
"ignoring.\n",
len, fdt_totalsize(blob));
} else {
/*
* Open in place with a new length.
*/
err = fdt_open_into(blob, blob, len);
if (err != 0) {
printf ("libfdt fdt_open_into(): %s\n",
fdt_strerror(err));
}
}
}
return CMD_RET_SUCCESS;
}
if (!working_fdt) {
puts(
"No FDT memory address configured. Please configure\n"
"the FDT address via \"fdt addr <address>\" command.\n"
"Aborting!\n");
return CMD_RET_FAILURE;
}
/*
* Move the working_fdt
*/
if (strncmp(argv[1], "mo", 2) == 0) {
struct fdt_header *newaddr;
int len;
int err;
if (argc < 4)
return CMD_RET_USAGE;
/*
* Set the address and length of the fdt.
*/
working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
if (!fdt_valid(&working_fdt))
return 1;
newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
/*
* If the user specifies a length, use that. Otherwise use the
* current length.
*/
if (argc <= 4) {
len = fdt_totalsize(working_fdt);
} else {
len = simple_strtoul(argv[4], NULL, 16);
if (len < fdt_totalsize(working_fdt)) {
printf ("New length 0x%X < existing length "
"0x%X, aborting.\n",
len, fdt_totalsize(working_fdt));
return 1;
}
}
/*
* Copy to the new location.
*/
err = fdt_open_into(working_fdt, newaddr, len);
if (err != 0) {
printf ("libfdt fdt_open_into(): %s\n",
fdt_strerror(err));
return 1;
}
set_working_fdt_addr((ulong)newaddr);
#ifdef CONFIG_OF_SYSTEM_SETUP
/* Call the board-specific fixup routine */
} else if (strncmp(argv[1], "sys", 3) == 0) {
int err = ft_system_setup(working_fdt, gd->bd);
if (err) {
printf("Failed to add system information to FDT: %s\n",
fdt_strerror(err));
return CMD_RET_FAILURE;
}
#endif
/*
* Make a new node
*/
} else if (strncmp(argv[1], "mk", 2) == 0) {
char *pathp; /* path */
char *nodep; /* new node to add */
int nodeoffset; /* node offset from libfdt */
int err;
/*
* Parameters: Node path, new node to be appended to the path.
*/
if (argc < 4)
return CMD_RET_USAGE;
pathp = argv[2];
nodep = argv[3];
nodeoffset = fdt_path_offset (working_fdt, pathp);
if (nodeoffset < 0) {
/*
* Not found or something else bad happened.
*/
printf ("libfdt fdt_path_offset() returned %s\n",
fdt_strerror(nodeoffset));
return 1;
}
err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
if (err < 0) {
printf ("libfdt fdt_add_subnode(): %s\n",
fdt_strerror(err));
return 1;
}
/*
* Set the value of a property in the working_fdt.
*/
} else if (strncmp(argv[1], "se", 2) == 0) {
char *pathp; /* path */
char *prop; /* property */
int nodeoffset; /* node offset from libfdt */
static char data[SCRATCHPAD] __aligned(4);/* property storage */
const void *ptmp;
int len; /* new length of the property */
int ret; /* return value */
/*
* Parameters: Node path, property, optional value.
*/
if (argc < 4)
return CMD_RET_USAGE;
pathp = argv[2];
prop = argv[3];
nodeoffset = fdt_path_offset (working_fdt, pathp);
if (nodeoffset < 0) {
/*
* Not found or something else bad happened.
*/
printf ("libfdt fdt_path_offset() returned %s\n",
fdt_strerror(nodeoffset));
return 1;
}
if (argc == 4) {
len = 0;
} else {
ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
if (len > SCRATCHPAD) {
printf("prop (%d) doesn't fit in scratchpad!\n",
len);
return 1;
}
if (ptmp != NULL)
memcpy(data, ptmp, len);
ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
if (ret != 0)
return ret;
}
ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
if (ret < 0) {
printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
return 1;
}
/********************************************************************
* Get the value of a property in the working_fdt.
********************************************************************/
} else if (argv[1][0] == 'g') {
char *subcmd; /* sub-command */
char *pathp; /* path */
char *prop; /* property */
char *var; /* variable to store result */
int nodeoffset; /* node offset from libfdt */
const void *nodep; /* property node pointer */
int len = 0; /* new length of the property */
/*
* Parameters: Node path, property, optional value.
*/
if (argc < 5)
return CMD_RET_USAGE;
subcmd = argv[2];
if (argc < 6 && subcmd[0] != 's')
return CMD_RET_USAGE;
var = argv[3];
pathp = argv[4];
prop = argv[5];
nodeoffset = fdt_path_offset(working_fdt, pathp);
if (nodeoffset < 0) {
/*
* Not found or something else bad happened.
*/
printf("libfdt fdt_path_offset() returned %s\n",
fdt_strerror(nodeoffset));
return 1;
}
if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
int reqIndex = -1;
int startDepth = fdt_node_depth(
working_fdt, nodeoffset);
int curDepth = startDepth;
int curIndex = -1;
int nextNodeOffset = fdt_next_node(
working_fdt, nodeoffset, &curDepth);
if (subcmd[0] == 'n')
reqIndex = simple_strtoul(argv[5], NULL, 16);
while (curDepth > startDepth) {
if (curDepth == startDepth + 1)
curIndex++;
if (subcmd[0] == 'n' && curIndex == reqIndex) {
const char *node_name;
node_name = fdt_get_name(working_fdt,
nextNodeOffset,
NULL);
env_set(var, node_name);
return 0;
}
nextNodeOffset = fdt_next_node(
working_fdt, nextNodeOffset, &curDepth);
if (nextNodeOffset < 0)
break;
}
if (subcmd[0] == 's') {
/* get the num nodes at this level */
env_set_ulong(var, curIndex + 1);
} else {
/* node index not found */
printf("libfdt node not found\n");
return 1;
}
} else {
nodep = fdt_getprop(
working_fdt, nodeoffset, prop, &len);
if (len == 0) {
/* no property value */
env_set(var, "");
return 0;
} else if (nodep && len > 0) {
if (subcmd[0] == 'v') {
int ret;
ret = fdt_value_env_set(nodep, len,
var);
if (ret != 0)
return ret;
} else if (subcmd[0] == 'a') {
/* Get address */
char buf[11];
sprintf(buf, "0x%p", nodep);
env_set(var, buf);
} else if (subcmd[0] == 's') {
/* Get size */
char buf[11];
sprintf(buf, "0x%08X", len);
env_set(var, buf);
} else
return CMD_RET_USAGE;
return 0;
} else {
printf("libfdt fdt_getprop(): %s\n",
fdt_strerror(len));
return 1;
}
}
/*
* Print (recursive) / List (single level)
*/
} else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
int depth = MAX_LEVEL; /* how deep to print */
char *pathp; /* path */
char *prop; /* property */
int ret; /* return value */
static char root[2] = "/";
/*
* list is an alias for print, but limited to 1 level
*/
if (argv[1][0] == 'l') {
depth = 1;
}
/*
* Get the starting path. The root node is an oddball,
* the offset is zero and has no name.
*/
if (argc == 2)
pathp = root;
else
pathp = argv[2];
if (argc > 3)
prop = argv[3];
else
prop = NULL;
ret = fdt_print(pathp, prop, depth);
if (ret != 0)
return ret;
/*
* Remove a property/node
*/
} else if (strncmp(argv[1], "rm", 2) == 0) {
int nodeoffset; /* node offset from libfdt */
int err;
/*
* Get the path. The root node is an oddball, the offset
* is zero and has no name.
*/
nodeoffset = fdt_path_offset (working_fdt, argv[2]);
if (nodeoffset < 0) {
/*
* Not found or something else bad happened.
*/
printf ("libfdt fdt_path_offset() returned %s\n",
fdt_strerror(nodeoffset));
return 1;
}
/*
* Do the delete. A fourth parameter means delete a property,
* otherwise delete the node.
*/
if (argc > 3) {
err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
if (err < 0) {
printf("libfdt fdt_delprop(): %s\n",
fdt_strerror(err));
return err;
}
} else {
err = fdt_del_node(working_fdt, nodeoffset);
if (err < 0) {
printf("libfdt fdt_del_node(): %s\n",
fdt_strerror(err));
return err;
}
}
/*
* Display header info
*/
} else if (argv[1][0] == 'h') {
if (argc == 5)
return fdt_get_header_value(argc, argv);
u32 version = fdt_version(working_fdt);
printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
fdt_totalsize(working_fdt));
printf("off_dt_struct:\t\t0x%x\n",
fdt_off_dt_struct(working_fdt));
printf("off_dt_strings:\t\t0x%x\n",
fdt_off_dt_strings(working_fdt));
printf("off_mem_rsvmap:\t\t0x%x\n",
fdt_off_mem_rsvmap(working_fdt));
printf("version:\t\t%d\n", version);
printf("last_comp_version:\t%d\n",
fdt_last_comp_version(working_fdt));
if (version >= 2)
printf("boot_cpuid_phys:\t0x%x\n",
fdt_boot_cpuid_phys(working_fdt));
if (version >= 3)
printf("size_dt_strings:\t0x%x\n",
fdt_size_dt_strings(working_fdt));
if (version >= 17)
printf("size_dt_struct:\t\t0x%x\n",
fdt_size_dt_struct(working_fdt));
printf("number mem_rsv:\t\t0x%x\n",
fdt_num_mem_rsv(working_fdt));
printf("\n");
/*
* Set boot cpu id
*/
} else if (strncmp(argv[1], "boo", 3) == 0) {
unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
fdt_set_boot_cpuid_phys(working_fdt, tmp);
/*
* memory command
*/
} else if (strncmp(argv[1], "me", 2) == 0) {
uint64_t addr, size;
int err;
addr = simple_strtoull(argv[2], NULL, 16);
size = simple_strtoull(argv[3], NULL, 16);
err = fdt_fixup_memory(working_fdt, addr, size);
if (err < 0)
return err;
/*
* mem reserve commands
*/
} else if (strncmp(argv[1], "rs", 2) == 0) {
if (argv[2][0] == 'p') {
uint64_t addr, size;
int total = fdt_num_mem_rsv(working_fdt);
int j, err;
printf("index\t\t start\t\t size\n");
printf("-------------------------------"
"-----------------\n");
for (j = 0; j < total; j++) {
err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
if (err < 0) {
printf("libfdt fdt_get_mem_rsv(): %s\n",
fdt_strerror(err));
return err;
}
printf(" %x\t%08x%08x\t%08x%08x\n", j,
(u32)(addr >> 32),
(u32)(addr & 0xffffffff),
(u32)(size >> 32),
(u32)(size & 0xffffffff));
}
} else if (argv[2][0] == 'a') {
uint64_t addr, size;
int err;
addr = simple_strtoull(argv[3], NULL, 16);
size = simple_strtoull(argv[4], NULL, 16);
err = fdt_add_mem_rsv(working_fdt, addr, size);
if (err < 0) {
printf("libfdt fdt_add_mem_rsv(): %s\n",
fdt_strerror(err));
return err;
}
} else if (argv[2][0] == 'd') {
unsigned long idx = simple_strtoul(argv[3], NULL, 16);
int err = fdt_del_mem_rsv(working_fdt, idx);
if (err < 0) {
printf("libfdt fdt_del_mem_rsv(): %s\n",
fdt_strerror(err));
return err;
}
} else {
/* Unrecognized command */
return CMD_RET_USAGE;
}
}
#ifdef CONFIG_OF_BOARD_SETUP
/* Call the board-specific fixup routine */
else if (strncmp(argv[1], "boa", 3) == 0) {
int err = ft_board_setup(working_fdt, gd->bd);
if (err) {
printf("Failed to update board information in FDT: %s\n",
fdt_strerror(err));
return CMD_RET_FAILURE;
}
#ifdef CONFIG_SOC_KEYSTONE
ft_board_setup_ex(working_fdt, gd->bd);
#endif
}
#endif
/* Create a chosen node */
else if (strncmp(argv[1], "cho", 3) == 0) {
unsigned long initrd_start = 0, initrd_end = 0;
if ((argc != 2) && (argc != 4))
return CMD_RET_USAGE;
if (argc == 4) {
initrd_start = simple_strtoul(argv[2], NULL, 16);
initrd_end = simple_strtoul(argv[3], NULL, 16);
}
fdt_chosen(working_fdt);
fdt_initrd(working_fdt, initrd_start, initrd_end);
#if defined(CONFIG_FIT_SIGNATURE)
} else if (strncmp(argv[1], "che", 3) == 0) {
int cfg_noffset;
int ret;
unsigned long addr;
struct fdt_header *blob;
if (!working_fdt)
return CMD_RET_FAILURE;
if (argc > 2) {
addr = simple_strtoul(argv[2], NULL, 16);
blob = map_sysmem(addr, 0);
} else {
blob = (struct fdt_header *)gd->fdt_blob;
}
if (!fdt_valid(&blob))
return 1;
gd->fdt_blob = blob;
cfg_noffset = fit_conf_get_node(working_fdt, NULL);
if (!cfg_noffset) {
printf("Could not find configuration node: %s\n",
fdt_strerror(cfg_noffset));
return CMD_RET_FAILURE;
}
ret = fit_config_verify(working_fdt, cfg_noffset);
if (ret == 0)
return CMD_RET_SUCCESS;
else
return CMD_RET_FAILURE;
#endif
}
#ifdef CONFIG_OF_LIBFDT_OVERLAY
/* apply an overlay */
else if (strncmp(argv[1], "ap", 2) == 0) {
unsigned long addr;
struct fdt_header *blob;
int ret;
if (argc != 3)
return CMD_RET_USAGE;
if (!working_fdt)
return CMD_RET_FAILURE;
addr = simple_strtoul(argv[2], NULL, 16);
blob = map_sysmem(addr, 0);
if (!fdt_valid(&blob))
return CMD_RET_FAILURE;
/* apply method prints messages on error */
ret = fdt_overlay_apply_verbose(working_fdt, blob);
if (ret)
return CMD_RET_FAILURE;
}
#endif
/* resize the fdt */
else if (strncmp(argv[1], "re", 2) == 0) {
uint extrasize;
if (argc > 2)
extrasize = simple_strtoul(argv[2], NULL, 16);
else
extrasize = 0;
fdt_shrink_to_minimum(working_fdt, extrasize);
}
else {
/* Unrecognized command */
return CMD_RET_USAGE;
}
return 0;
}
/****************************************************************************/
/**
* fdt_valid() - Check if an FDT is valid. If not, change it to NULL
*
* @blobp: Pointer to FDT pointer
* @return 1 if OK, 0 if bad (in which case *blobp is set to NULL)
*/
static int fdt_valid(struct fdt_header **blobp)
{
const void *blob = *blobp;
int err;
if (blob == NULL) {
printf ("The address of the fdt is invalid (NULL).\n");
return 0;
}
err = fdt_check_header(blob);
if (err == 0)
return 1; /* valid */
if (err < 0) {
printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
/*
* Be more informative on bad version.
*/
if (err == -FDT_ERR_BADVERSION) {
if (fdt_version(blob) <
FDT_FIRST_SUPPORTED_VERSION) {
printf (" - too old, fdt %d < %d",
fdt_version(blob),
FDT_FIRST_SUPPORTED_VERSION);
}
if (fdt_last_comp_version(blob) >
FDT_LAST_SUPPORTED_VERSION) {
printf (" - too new, fdt %d > %d",
fdt_version(blob),
FDT_LAST_SUPPORTED_VERSION);
}
}
printf("\n");
*blobp = NULL;
return 0;
}
return 1;
}
/****************************************************************************/
/*
* Parse the user's input, partially heuristic. Valid formats:
* <0x00112233 4 05> - an array of cells. Numbers follow standard
* C conventions.
* [00 11 22 .. nn] - byte stream
* "string" - If the the value doesn't start with "<" or "[", it is
* treated as a string. Note that the quotes are
* stripped by the parser before we get the string.
* newval: An array of strings containing the new property as specified
* on the command line
* count: The number of strings in the array
* data: A bytestream to be placed in the property
* len: The length of the resulting bytestream
*/
static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
{
char *cp; /* temporary char pointer */
char *newp; /* temporary newval char pointer */
unsigned long tmp; /* holds converted values */
int stridx = 0;
*len = 0;
newp = newval[0];
/* An array of cells */
if (*newp == '<') {
newp++;
while ((*newp != '>') && (stridx < count)) {
/*
* Keep searching until we find that last ">"
* That way users don't have to escape the spaces
*/
if (*newp == '\0') {
newp = newval[++stridx];
continue;
}
cp = newp;
tmp = simple_strtoul(cp, &newp, 0);
if (*cp != '?')
*(fdt32_t *)data = cpu_to_fdt32(tmp);
else
newp++;
data += 4;
*len += 4;
/* If the ptr didn't advance, something went wrong */
if ((newp - cp) <= 0) {
printf("Sorry, I could not convert \"%s\"\n",
cp);
return 1;
}
while (*newp == ' ')
newp++;
}
if (*newp != '>') {
printf("Unexpected character '%c'\n", *newp);
return 1;
}
} else if (*newp == '[') {
/*
* Byte stream. Convert the values.
*/
newp++;
while ((stridx < count) && (*newp != ']')) {
while (*newp == ' ')
newp++;
if (*newp == '\0') {
newp = newval[++stridx];
continue;
}
if (!isxdigit(*newp))
break;
tmp = simple_strtoul(newp, &newp, 16);
*data++ = tmp & 0xFF;
*len = *len + 1;
}
if (*newp != ']') {
printf("Unexpected character '%c'\n", *newp);
return 1;
}
} else {
/*
* Assume it is one or more strings. Copy it into our
* data area for convenience (including the
* terminating '\0's).
*/
while (stridx < count) {
size_t length = strlen(newp) + 1;
strcpy(data, newp);
data += length;
*len += length;
newp = newval[++stridx];
}
}
return 0;
}
/****************************************************************************/
/*
* Heuristic to guess if this is a string or concatenated strings.
*/
static int is_printable_string(const void *data, int len)
{
const char *s = data;
/* zero length is not */
if (len == 0)
return 0;
/* must terminate with zero or '\n' */
if (s[len - 1] != '\0' && s[len - 1] != '\n')
return 0;
/* printable or a null byte (concatenated strings) */
while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
/*
* If we see a null, there are three possibilities:
* 1) If len == 1, it is the end of the string, printable
* 2) Next character also a null, not printable.
* 3) Next character not a null, continue to check.
*/
if (s[0] == '\0') {
if (len == 1)
return 1;
if (s[1] == '\0')
return 0;
}
s++;
len--;
}
/* Not the null termination, or not done yet: not printable */
if (*s != '\0' || (len != 0))
return 0;
return 1;
}
/*
* Print the property in the best format, a heuristic guess. Print as
* a string, concatenated strings, a byte, word, double word, or (if all
* else fails) it is printed as a stream of bytes.
*/
static void print_data(const void *data, int len)
{
int j;
/* no data, don't print */
if (len == 0)
return;
/*
* It is a string, but it may have multiple strings (embedded '\0's).
*/
if (is_printable_string(data, len)) {
puts("\"");
j = 0;
while (j < len) {
if (j > 0)
puts("\", \"");
puts(data);
j += strlen(data) + 1;
data += strlen(data) + 1;
}
puts("\"");
return;
}
if ((len %4) == 0) {
if (len > CMD_FDT_MAX_DUMP)
printf("* 0x%p [0x%08x]", data, len);
else {
const __be32 *p;
printf("<");
for (j = 0, p = data; j < len/4; j++)
printf("0x%08x%s", fdt32_to_cpu(p[j]),
j < (len/4 - 1) ? " " : "");
printf(">");
}
} else { /* anything else... hexdump */
if (len > CMD_FDT_MAX_DUMP)
printf("* 0x%p [0x%08x]", data, len);
else {
const u8 *s;
printf("[");
for (j = 0, s = data; j < len; j++)
printf("%02x%s", s[j], j < len - 1 ? " " : "");
printf("]");
}
}
}
/****************************************************************************/
/*
* Recursively print (a portion of) the working_fdt. The depth parameter
* determines how deeply nested the fdt is printed.
*/
static int fdt_print(const char *pathp, char *prop, int depth)
{
static char tabs[MAX_LEVEL+1] =
"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
const void *nodep; /* property node pointer */
int nodeoffset; /* node offset from libfdt */
int nextoffset; /* next node offset from libfdt */
uint32_t tag; /* tag */
int len; /* length of the property */
int level = 0; /* keep track of nesting level */
const struct fdt_property *fdt_prop;
nodeoffset = fdt_path_offset (working_fdt, pathp);
if (nodeoffset < 0) {
/*
* Not found or something else bad happened.
*/
printf ("libfdt fdt_path_offset() returned %s\n",
fdt_strerror(nodeoffset));
return 1;
}
/*
* The user passed in a property as well as node path.
* Print only the given property and then return.
*/
if (prop) {
nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
if (len == 0) {
/* no property value */
printf("%s %s\n", pathp, prop);
return 0;
} else if (nodep && len > 0) {
printf("%s = ", prop);
print_data (nodep, len);
printf("\n");
return 0;
} else {
printf ("libfdt fdt_getprop(): %s\n",
fdt_strerror(len));
return 1;
}
}
/*
* The user passed in a node path and no property,
* print the node and all subnodes.
*/
while(level >= 0) {
tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
switch(tag) {
case FDT_BEGIN_NODE:
pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
if (level <= depth) {
if (pathp == NULL)
pathp = "/* NULL pointer error */";
if (*pathp == '\0')
pathp = "/"; /* root is nameless */
printf("%s%s {\n",
&tabs[MAX_LEVEL - level], pathp);
}
level++;
if (level >= MAX_LEVEL) {
printf("Nested too deep, aborting.\n");
return 1;
}
break;
case FDT_END_NODE:
level--;
if (level <= depth)
printf("%s};\n", &tabs[MAX_LEVEL - level]);
if (level == 0) {
level = -1; /* exit the loop */
}
break;
case FDT_PROP:
fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
sizeof(*fdt_prop));
pathp = fdt_string(working_fdt,
fdt32_to_cpu(fdt_prop->nameoff));
len = fdt32_to_cpu(fdt_prop->len);
nodep = fdt_prop->data;
if (len < 0) {
printf ("libfdt fdt_getprop(): %s\n",
fdt_strerror(len));
return 1;
} else if (len == 0) {
/* the property has no value */
if (level <= depth)
printf("%s%s;\n",
&tabs[MAX_LEVEL - level],
pathp);
} else {
if (level <= depth) {
printf("%s%s = ",
&tabs[MAX_LEVEL - level],
pathp);
print_data (nodep, len);
printf(";\n");
}
}
break;
case FDT_NOP:
printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
break;
case FDT_END:
return 1;
default:
if (level <= depth)
printf("Unknown tag 0x%08X\n", tag);
return 1;
}
nodeoffset = nextoffset;
}
return 0;
}
/********************************************************************/
#ifdef CONFIG_SYS_LONGHELP
static char fdt_help_text[] =
"addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n"
#ifdef CONFIG_OF_LIBFDT_OVERLAY
"fdt apply <addr> - Apply overlay to the DT\n"
#endif
#ifdef CONFIG_OF_BOARD_SETUP
"fdt boardsetup - Do board-specific set up\n"
#endif
#ifdef CONFIG_OF_SYSTEM_SETUP
"fdt systemsetup - Do system-specific set up\n"
#endif
"fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
"fdt resize [<extrasize>] - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
"fdt print <path> [<prop>] - Recursive print starting at <path>\n"
"fdt list <path> [<prop>] - Print one level starting at <path>\n"
"fdt get value <var> <path> <prop> - Get <property> and store in <var>\n"
"fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n"
"fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n"
"fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n"
"fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
"fdt mknode <path> <node> - Create a new node after <path>\n"
"fdt rm <path> [<prop>] - Delete the node or <property>\n"
"fdt header [get <var> <member>] - Display header info\n"
" get - get header member <member> and store it in <var>\n"
"fdt bootcpu <id> - Set boot cpuid\n"
"fdt memory <addr> <size> - Add/Update memory node\n"
"fdt rsvmem print - Show current mem reserves\n"
"fdt rsvmem add <addr> <size> - Add a mem reserve\n"
"fdt rsvmem delete <index> - Delete a mem reserves\n"
"fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n"
" <start>/<end> - initrd start/end addr\n"
#if defined(CONFIG_FIT_SIGNATURE)
"fdt checksign [<addr>] - check FIT signature\n"
" <start> - addr of key blob\n"
" default gd->fdt_blob\n"
#endif
"NOTE: Dereference aliases by omitting the leading '/', "
"e.g. fdt print ethernet0.";
#endif
U_BOOT_CMD(
fdt, 255, 0, do_fdt,
"flattened device tree utility commands", fdt_help_text
);
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