--- /dev/null
+/*
+ * (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>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <linux/ctype.h>
+#include <linux/types.h>
+#include <asm/global_data.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+#include <asm/io.h>
+
+#define MAX_LEVEL 32 /* how deeply nested we will go */
+#define SCRATCHPAD 1024 /* bytes of scratchpad memory */
+#ifndef CONFIG_CMD_FDT_MAX_DUMP
+#define CONFIG_CMD_FDT_MAX_DUMP 64
+#endif
+
+/*
+ * 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(void *addr)
+{
+ void *buf;
+
+ buf = map_sysmem((ulong)addr, 0);
+ working_fdt = buf;
+ setenv_addr("fdtaddr", addr);
+}
+
+/*
+ * Get a value from the fdt and format it to be set in the environment
+ */
+static int fdt_value_setenv(const void *nodep, int len, const char *var)
+{
+ if (is_printable_string(nodep, len))
+ setenv(var, (void *)nodep);
+ else if (len == 4) {
+ char buf[11];
+
+ sprintf(buf, "0x%08X", *(uint32_t *)nodep);
+ setenv(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));
+ setenv(var, buf);
+ } else {
+ printf("error: unprintable value\n");
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * 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 (argv[1][0] == 'a') {
+ 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)blob :
+ getenv_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(blob);
+
+ 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;
+ }
+ working_fdt = newaddr;
+
+ /*
+ * 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 (argv[1][0] == 's') {
+ char *pathp; /* path */
+ char *prop; /* property */
+ int nodeoffset; /* node offset from libfdt */
+ static char data[SCRATCHPAD]; /* storage for the property */
+ 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];
+ if (argc == 4) {
+ len = 0;
+ } else {
+ ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
+ if (ret != 0)
+ return ret;
+ }
+
+ 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;
+ }
+
+ 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 *nodeName = fdt_get_name(
+ working_fdt, nextNodeOffset, NULL);
+
+ setenv(var, (char *)nodeName);
+ 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 */
+ setenv_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 */
+ setenv(var, "");
+ return 0;
+ } else if (len > 0) {
+ if (subcmd[0] == 'v') {
+ int ret;
+
+ ret = fdt_value_setenv(nodep, len, var);
+ if (ret != 0)
+ return ret;
+ } else if (subcmd[0] == 'a') {
+ /* Get address */
+ char buf[11];
+
+ sprintf(buf, "0x%p", nodep);
+ setenv(var, buf);
+ } else if (subcmd[0] == 's') {
+ /* Get size */
+ char buf[11];
+
+ sprintf(buf, "0x%08X", len);
+ setenv(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') {
+ 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)
+ ft_board_setup(working_fdt, gd->bd);
+#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, 1);
+ fdt_initrd(working_fdt, initrd_start, initrd_end, 1);
+
+#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 == 1)
+ return CMD_RET_SUCCESS;
+ else
+ return CMD_RET_FAILURE;
+#endif
+
+ }
+ /* resize the fdt */
+ else if (strncmp(argv[1], "re", 2) == 0) {
+ fdt_resize(working_fdt);
+ }
+ 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);
+ *(__be32 *)data = __cpu_to_be32(tmp);
+ 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 > CONFIG_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 > CONFIG_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 (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_BOARD_SETUP
+ "fdt boardsetup - Do board-specific set up\n"
+#endif
+ "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
+ "fdt resize - Resize fdt to size + padding to 4k addr\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 - Display header info\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 omiting the leading '/', "
+ "e.g. fdt print ethernet0.";
+#endif
+
+U_BOOT_CMD(
+ fdt, 255, 0, do_fdt,
+ "flattened device tree utility commands", fdt_help_text
+);
Code Review / kvmfornfv.git / blobdiff