* [RFC PATCH 3/4] Add the dtc for device-tree manipulation
2012-09-05 11:43 [RFC PATCH 0/4] Add device-tree support to kexec-tools for ARM Matthew Leach
2012-09-05 11:44 ` [RFC PATCH 1/4] Fix an overflow bug with address comparison Matthew Leach
2012-09-05 11:44 ` [RFC PATCH 2/4] Move libfdt to a generic location Matthew Leach
@ 2012-09-05 11:44 ` Matthew Leach
2012-09-05 11:44 ` [RFC PATCH 4/4] Add device tree support to the ARM platform Matthew Leach
2012-09-05 12:38 ` [RFC PATCH 0/4] Add device-tree support to kexec-tools for ARM Simon Horman
4 siblings, 0 replies; 15+ messages in thread
From: Matthew Leach @ 2012-09-05 11:44 UTC (permalink / raw)
To: kexec; +Cc: Matthew Leach, will.deacon
The dtc includes functions for generating a dtb for the currently
running kernel that is exposed in /proc/device-tree. Include the dtc
so a dtb can be generated for a new kernel without the user having to
obtain a dtb file.
Signed-off-by: Matthew Leach <matthew.leach@arm.com>
---
util_lib/Makefile | 2 +
util_lib/dtc/Makefile.dtc | 9 +
util_lib/dtc/data.c | 321 ++++++++++++++++++++++
util_lib/dtc/dtc.c | 44 +++
util_lib/dtc/dtc.h | 244 +++++++++++++++++
util_lib/dtc/flattree.c | 649 +++++++++++++++++++++++++++++++++++++++++++++
util_lib/dtc/fstree.c | 91 +++++++
util_lib/dtc/livetree.c | 579 ++++++++++++++++++++++++++++++++++++++++
util_lib/dtc/srcpos.c | 252 ++++++++++++++++++
util_lib/dtc/srcpos.h | 87 ++++++
util_lib/dtc/util.c | 59 +++++
util_lib/dtc/util.h | 56 ++++
util_lib/dtc/version_gen.h | 1 +
13 files changed, 2394 insertions(+)
create mode 100644 util_lib/dtc/Makefile.dtc
create mode 100644 util_lib/dtc/data.c
create mode 100644 util_lib/dtc/dtc.c
create mode 100644 util_lib/dtc/dtc.h
create mode 100644 util_lib/dtc/flattree.c
create mode 100644 util_lib/dtc/fstree.c
create mode 100644 util_lib/dtc/livetree.c
create mode 100644 util_lib/dtc/srcpos.c
create mode 100644 util_lib/dtc/srcpos.h
create mode 100644 util_lib/dtc/util.c
create mode 100644 util_lib/dtc/util.h
create mode 100644 util_lib/dtc/version_gen.h
diff --git a/util_lib/Makefile b/util_lib/Makefile
index 54ccdc5..8b00944 100644
--- a/util_lib/Makefile
+++ b/util_lib/Makefile
@@ -1,6 +1,8 @@
#
# Utility function library
#
+include $(srcdir)/util_lib/dtc/Makefile.dtc
+
UTIL_LIB_SRCS +=
UTIL_LIB_SRCS += util_lib/compute_ip_checksum.c
UTIL_LIB_SRCS += util_lib/sha256.c
diff --git a/util_lib/dtc/Makefile.dtc b/util_lib/dtc/Makefile.dtc
new file mode 100644
index 0000000..3433d76
--- /dev/null
+++ b/util_lib/dtc/Makefile.dtc
@@ -0,0 +1,9 @@
+DTC_INCLUDES = dtc.h srcpos.h util.h version_gen.h
+DTC_SRCS = fstree.c flattree.c srcpos.c util.c livetree.c data.c dtc.c
+DTC_OBJS = $(DTC_SRCS:%.c=%.o)
+
+CPPFLAGS += -I$(srcdir)/util_lib/dtc/
+
+dist += util_lib/dtc/Makefile.dtc \
+ $(DTC_SRCS:%=util_lib/dtc/%) \
+ $(DTC_INCLUDES:%=util_lib/dtc/%)
\ No newline at end of file
diff --git a/util_lib/dtc/data.c b/util_lib/dtc/data.c
new file mode 100644
index 0000000..fe555e8
--- /dev/null
+++ b/util_lib/dtc/data.c
@@ -0,0 +1,321 @@
+/*
+ * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include "dtc.h"
+
+void data_free(struct data d)
+{
+ struct marker *m, *nm;
+
+ m = d.markers;
+ while (m) {
+ nm = m->next;
+ free(m->ref);
+ free(m);
+ m = nm;
+ }
+
+ if (d.val)
+ free(d.val);
+}
+
+struct data data_grow_for(struct data d, int xlen)
+{
+ struct data nd;
+ int newsize;
+
+ if (xlen == 0)
+ return d;
+
+ nd = d;
+
+ newsize = xlen;
+
+ while ((d.len + xlen) > newsize)
+ newsize *= 2;
+
+ nd.val = xrealloc(d.val, newsize);
+
+ return nd;
+}
+
+struct data data_copy_mem(const char *mem, int len)
+{
+ struct data d;
+
+ d = data_grow_for(empty_data, len);
+
+ d.len = len;
+ memcpy(d.val, mem, len);
+
+ return d;
+}
+
+static char get_oct_char(const char *s, int *i)
+{
+ char x[4];
+ char *endx;
+ long val;
+
+ x[3] = '\0';
+ strncpy(x, s + *i, 3);
+
+ val = strtol(x, &endx, 8);
+
+ assert(endx > x);
+
+ (*i) += endx - x;
+ return val;
+}
+
+static char get_hex_char(const char *s, int *i)
+{
+ char x[3];
+ char *endx;
+ long val;
+
+ x[2] = '\0';
+ strncpy(x, s + *i, 2);
+
+ val = strtol(x, &endx, 16);
+ if (!(endx > x))
+ die("\\x used with no following hex digits\n");
+
+ (*i) += endx - x;
+ return val;
+}
+
+struct data data_copy_escape_string(const char *s, int len)
+{
+ int i = 0;
+ struct data d;
+ char *q;
+
+ d = data_grow_for(empty_data, strlen(s)+1);
+
+ q = d.val;
+ while (i < len) {
+ char c = s[i++];
+
+ if (c != '\\') {
+ q[d.len++] = c;
+ continue;
+ }
+
+ c = s[i++];
+ assert(c);
+ switch (c) {
+ case 'a':
+ q[d.len++] = '\a';
+ break;
+ case 'b':
+ q[d.len++] = '\b';
+ break;
+ case 't':
+ q[d.len++] = '\t';
+ break;
+ case 'n':
+ q[d.len++] = '\n';
+ break;
+ case 'v':
+ q[d.len++] = '\v';
+ break;
+ case 'f':
+ q[d.len++] = '\f';
+ break;
+ case 'r':
+ q[d.len++] = '\r';
+ break;
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ i--; /* need to re-read the first digit as
+ * part of the octal value */
+ q[d.len++] = get_oct_char(s, &i);
+ break;
+ case 'x':
+ q[d.len++] = get_hex_char(s, &i);
+ break;
+ default:
+ q[d.len++] = c;
+ }
+ }
+
+ q[d.len++] = '\0';
+ return d;
+}
+
+struct data data_copy_file(FILE *f, size_t maxlen)
+{
+ struct data d = empty_data;
+
+ while (!feof(f) && (d.len < maxlen)) {
+ size_t chunksize, ret;
+
+ if (maxlen == -1)
+ chunksize = 4096;
+ else
+ chunksize = maxlen - d.len;
+
+ d = data_grow_for(d, chunksize);
+ ret = fread(d.val + d.len, 1, chunksize, f);
+
+ if (ferror(f))
+ die("Error reading file into data: %s", strerror(errno));
+
+ if (d.len + ret < d.len)
+ die("Overflow reading file into data\n");
+
+ d.len += ret;
+ }
+
+ return d;
+}
+
+struct data data_append_data(struct data d, const void *p, int len)
+{
+ d = data_grow_for(d, len);
+ memcpy(d.val + d.len, p, len);
+ d.len += len;
+ return d;
+}
+
+struct data data_insert_at_marker(struct data d, struct marker *m,
+ const void *p, int len)
+{
+ d = data_grow_for(d, len);
+ memmove(d.val + m->offset + len, d.val + m->offset, d.len - m->offset);
+ memcpy(d.val + m->offset, p, len);
+ d.len += len;
+
+ /* Adjust all markers after the one we're inserting at */
+ m = m->next;
+ for_each_marker(m)
+ m->offset += len;
+ return d;
+}
+
+static struct data data_append_markers(struct data d, struct marker *m)
+{
+ struct marker **mp = &d.markers;
+
+ /* Find the end of the markerlist */
+ while (*mp)
+ mp = &((*mp)->next);
+ *mp = m;
+ return d;
+}
+
+struct data data_merge(struct data d1, struct data d2)
+{
+ struct data d;
+ struct marker *m2 = d2.markers;
+
+ d = data_append_markers(data_append_data(d1, d2.val, d2.len), m2);
+
+ /* Adjust for the length of d1 */
+ for_each_marker(m2)
+ m2->offset += d1.len;
+
+ d2.markers = NULL; /* So data_free() doesn't clobber them */
+ data_free(d2);
+
+ return d;
+}
+
+struct data data_append_cell(struct data d, cell_t word)
+{
+ cell_t beword = cpu_to_fdt32(word);
+
+ return data_append_data(d, &beword, sizeof(beword));
+}
+
+struct data data_append_re(struct data d, const struct fdt_reserve_entry *re)
+{
+ struct fdt_reserve_entry bere;
+
+ bere.address = cpu_to_fdt64(re->address);
+ bere.size = cpu_to_fdt64(re->size);
+
+ return data_append_data(d, &bere, sizeof(bere));
+}
+
+struct data data_append_addr(struct data d, uint64_t addr)
+{
+ uint64_t beaddr = cpu_to_fdt64(addr);
+
+ return data_append_data(d, &beaddr, sizeof(beaddr));
+}
+
+struct data data_append_byte(struct data d, uint8_t byte)
+{
+ return data_append_data(d, &byte, 1);
+}
+
+struct data data_append_zeroes(struct data d, int len)
+{
+ d = data_grow_for(d, len);
+
+ memset(d.val + d.len, 0, len);
+ d.len += len;
+ return d;
+}
+
+struct data data_append_align(struct data d, int align)
+{
+ int newlen = ALIGN(d.len, align);
+ return data_append_zeroes(d, newlen - d.len);
+}
+
+struct data data_add_marker(struct data d, enum markertype type, char *ref)
+{
+ struct marker *m;
+
+ m = xmalloc(sizeof(*m));
+ m->offset = d.len;
+ m->type = type;
+ m->ref = ref;
+ m->next = NULL;
+
+ return data_append_markers(d, m);
+}
+
+int data_is_one_string(struct data d)
+{
+ int i;
+ int len = d.len;
+
+ if (len == 0)
+ return 0;
+
+ for (i = 0; i < len-1; i++)
+ if (d.val[i] == '\0')
+ return 0;
+
+ if (d.val[len-1] != '\0')
+ return 0;
+
+ return 1;
+}
diff --git a/util_lib/dtc/dtc.c b/util_lib/dtc/dtc.c
new file mode 100644
index 0000000..b812dfc
--- /dev/null
+++ b/util_lib/dtc/dtc.c
@@ -0,0 +1,44 @@
+/*
+ * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include "dtc.h"
+#include "srcpos.h"
+
+#include "version_gen.h"
+
+static void fill_fullpaths(struct node *tree, const char *prefix)
+{
+ struct node *child;
+ const char *unit;
+
+ tree->fullpath = join_path(prefix, tree->name);
+
+ unit = strchr(tree->name, '@');
+ if (unit)
+ tree->basenamelen = unit - tree->name;
+ else
+ tree->basenamelen = strlen(tree->name);
+
+ for_each_child(tree, child)
+ fill_fullpaths(child, tree->fullpath);
+}
+
+
+
diff --git a/util_lib/dtc/dtc.h b/util_lib/dtc/dtc.h
new file mode 100644
index 0000000..afb26f6
--- /dev/null
+++ b/util_lib/dtc/dtc.h
@@ -0,0 +1,244 @@
+#ifndef _DTC_H
+#define _DTC_H
+
+/*
+ * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include <libfdt_env.h>
+#include <fdt.h>
+
+#include "util.h"
+
+#ifdef DEBUG
+#define debug(fmt,args...) printf(fmt, ##args)
+#else
+#define debug(fmt,args...)
+#endif
+
+
+#define DEFAULT_FDT_VERSION 17
+
+/*
+ * Command line options
+ */
+extern int quiet; /* Level of quietness */
+extern int reservenum; /* Number of memory reservation slots */
+extern int minsize; /* Minimum blob size */
+extern int padsize; /* Additional padding to blob */
+extern int phandle_format; /* Use linux,phandle or phandle properties */
+
+#define PHANDLE_LEGACY 0x1
+#define PHANDLE_EPAPR 0x2
+#define PHANDLE_BOTH 0x3
+
+typedef uint32_t cell_t;
+
+
+#define streq(a, b) (strcmp((a), (b)) == 0)
+#define strneq(a, b, n) (strncmp((a), (b), (n)) == 0)
+
+#define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+/* Data blobs */
+enum markertype {
+ REF_PHANDLE,
+ REF_PATH,
+ LABEL,
+};
+
+struct marker {
+ enum markertype type;
+ int offset;
+ char *ref;
+ struct marker *next;
+};
+
+struct data {
+ int len;
+ char *val;
+ struct marker *markers;
+};
+
+
+#define empty_data ((struct data){ /* all .members = 0 or NULL */ })
+
+#define for_each_marker(m) \
+ for (; (m); (m) = (m)->next)
+#define for_each_marker_of_type(m, t) \
+ for_each_marker(m) \
+ if ((m)->type == (t))
+
+void data_free(struct data d);
+
+struct data data_grow_for(struct data d, int xlen);
+
+struct data data_copy_mem(const char *mem, int len);
+struct data data_copy_escape_string(const char *s, int len);
+struct data data_copy_file(FILE *f, size_t len);
+
+struct data data_append_data(struct data d, const void *p, int len);
+struct data data_insert_at_marker(struct data d, struct marker *m,
+ const void *p, int len);
+struct data data_merge(struct data d1, struct data d2);
+struct data data_append_cell(struct data d, cell_t word);
+struct data data_append_re(struct data d, const struct fdt_reserve_entry *re);
+struct data data_append_addr(struct data d, uint64_t addr);
+struct data data_append_byte(struct data d, uint8_t byte);
+struct data data_append_zeroes(struct data d, int len);
+struct data data_append_align(struct data d, int align);
+
+struct data data_add_marker(struct data d, enum markertype type, char *ref);
+
+int data_is_one_string(struct data d);
+
+/* DT constraints */
+
+#define MAX_PROPNAME_LEN 31
+#define MAX_NODENAME_LEN 31
+
+/* Live trees */
+struct label {
+ char *label;
+ struct label *next;
+};
+
+struct property {
+ char *name;
+ struct data val;
+
+ struct property *next;
+
+ struct label *labels;
+};
+
+struct node {
+ char *name;
+ struct property *proplist;
+ struct node *children;
+
+ struct node *parent;
+ struct node *next_sibling;
+
+ char *fullpath;
+ int basenamelen;
+
+ cell_t phandle;
+ int addr_cells, size_cells;
+
+ struct label *labels;
+};
+
+#define for_each_label(l0, l) \
+ for ((l) = (l0); (l); (l) = (l)->next)
+
+#define for_each_property(n, p) \
+ for ((p) = (n)->proplist; (p); (p) = (p)->next)
+
+#define for_each_child(n, c) \
+ for ((c) = (n)->children; (c); (c) = (c)->next_sibling)
+
+void add_label(struct label **labels, char *label);
+
+struct property *build_property(char *name, struct data val);
+struct property *chain_property(struct property *first, struct property *list);
+struct property *reverse_properties(struct property *first);
+
+struct node *build_node(struct property *proplist, struct node *children);
+struct node *name_node(struct node *node, char *name);
+struct node *chain_node(struct node *first, struct node *list);
+struct node *merge_nodes(struct node *old_node, struct node *new_node);
+
+void add_property(struct node *node, struct property *prop);
+void add_child(struct node *parent, struct node *child);
+
+const char *get_unitname(struct node *node);
+struct property *get_property(struct node *node, const char *propname);
+cell_t propval_cell(struct property *prop);
+struct property *get_property_by_label(struct node *tree, const char *label,
+ struct node **node);
+struct marker *get_marker_label(struct node *tree, const char *label,
+ struct node **node, struct property **prop);
+struct node *get_subnode(struct node *node, const char *nodename);
+struct node *get_node_by_path(struct node *tree, const char *path);
+struct node *get_node_by_label(struct node *tree, const char *label);
+struct node *get_node_by_phandle(struct node *tree, cell_t phandle);
+struct node *get_node_by_ref(struct node *tree, const char *ref);
+cell_t get_node_phandle(struct node *root, struct node *node);
+
+uint32_t guess_boot_cpuid(struct node *tree);
+
+/* Boot info (tree plus memreserve information */
+
+struct reserve_info {
+ struct fdt_reserve_entry re;
+
+ struct reserve_info *next;
+
+ struct label *labels;
+};
+
+struct reserve_info *build_reserve_entry(uint64_t start, uint64_t len);
+struct reserve_info *chain_reserve_entry(struct reserve_info *first,
+ struct reserve_info *list);
+struct reserve_info *add_reserve_entry(struct reserve_info *list,
+ struct reserve_info *new);
+
+
+struct boot_info {
+ struct reserve_info *reservelist;
+ struct node *dt; /* the device tree */
+ uint32_t boot_cpuid_phys;
+};
+
+struct boot_info *build_boot_info(struct reserve_info *reservelist,
+ struct node *tree, uint32_t boot_cpuid_phys);
+void sort_tree(struct boot_info *bi);
+
+/* Checks */
+
+void process_checks(int force, struct boot_info *bi);
+
+/* Flattened trees */
+
+void* dt_to_blob_buf(off_t* size, struct boot_info *bi, int version);
+
+struct boot_info *dt_from_blob(const char *fname);
+
+/* Tree source */
+
+void dt_to_source(FILE *f, struct boot_info *bi);
+struct boot_info *dt_from_source(const char *f);
+
+/* FS trees */
+
+struct boot_info *dt_from_fs(const char *dirname);
+
+#endif /* _DTC_H */
diff --git a/util_lib/dtc/flattree.c b/util_lib/dtc/flattree.c
new file mode 100644
index 0000000..d110001
--- /dev/null
+++ b/util_lib/dtc/flattree.c
@@ -0,0 +1,649 @@
+/*
+ * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include "dtc.h"
+#include "srcpos.h"
+
+#define FTF_FULLPATH 0x1
+#define FTF_VARALIGN 0x2
+#define FTF_NAMEPROPS 0x4
+#define FTF_BOOTCPUID 0x8
+#define FTF_STRTABSIZE 0x10
+#define FTF_STRUCTSIZE 0x20
+#define FTF_NOPS 0x40
+
+static struct version_info {
+ int version;
+ int last_comp_version;
+ int hdr_size;
+ int flags;
+} version_table[] = {
+ {1, 1, FDT_V1_SIZE,
+ FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS},
+ {2, 1, FDT_V2_SIZE,
+ FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS|FTF_BOOTCPUID},
+ {3, 1, FDT_V3_SIZE,
+ FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS|FTF_BOOTCPUID|FTF_STRTABSIZE},
+ {16, 16, FDT_V3_SIZE,
+ FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_NOPS},
+ {17, 16, FDT_V17_SIZE,
+ FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_STRUCTSIZE|FTF_NOPS},
+};
+
+struct emitter {
+ void (*cell)(void *, cell_t);
+ void (*string)(void *, char *, int);
+ void (*align)(void *, int);
+ void (*data)(void *, struct data);
+ void (*beginnode)(void *, struct label *labels);
+ void (*endnode)(void *, struct label *labels);
+ void (*property)(void *, struct label *labels);
+};
+
+static void bin_emit_cell(void *e, cell_t val)
+{
+ struct data *dtbuf = e;
+
+ *dtbuf = data_append_cell(*dtbuf, val);
+}
+
+static void bin_emit_string(void *e, char *str, int len)
+{
+ struct data *dtbuf = e;
+
+ if (len == 0)
+ len = strlen(str);
+
+ *dtbuf = data_append_data(*dtbuf, str, len);
+ *dtbuf = data_append_byte(*dtbuf, '\0');
+}
+
+static void bin_emit_align(void *e, int a)
+{
+ struct data *dtbuf = e;
+
+ *dtbuf = data_append_align(*dtbuf, a);
+}
+
+static void bin_emit_data(void *e, struct data d)
+{
+ struct data *dtbuf = e;
+
+ *dtbuf = data_append_data(*dtbuf, d.val, d.len);
+}
+
+static void bin_emit_beginnode(void *e, struct label *labels)
+{
+ bin_emit_cell(e, FDT_BEGIN_NODE);
+}
+
+static void bin_emit_endnode(void *e, struct label *labels)
+{
+ bin_emit_cell(e, FDT_END_NODE);
+}
+
+static void bin_emit_property(void *e, struct label *labels)
+{
+ bin_emit_cell(e, FDT_PROP);
+}
+
+static struct emitter bin_emitter = {
+ .cell = bin_emit_cell,
+ .string = bin_emit_string,
+ .align = bin_emit_align,
+ .data = bin_emit_data,
+ .beginnode = bin_emit_beginnode,
+ .endnode = bin_emit_endnode,
+ .property = bin_emit_property,
+};
+
+
+#define ASM_EMIT_BELONG(f, fmt, ...) \
+ { \
+ fprintf((f), "\t.byte\t((" fmt ") >> 24) & 0xff\n", __VA_ARGS__); \
+ fprintf((f), "\t.byte\t((" fmt ") >> 16) & 0xff\n", __VA_ARGS__); \
+ fprintf((f), "\t.byte\t((" fmt ") >> 8) & 0xff\n", __VA_ARGS__); \
+ fprintf((f), "\t.byte\t(" fmt ") & 0xff\n", __VA_ARGS__); \
+ }
+
+
+
+
+static int stringtable_insert(struct data *d, const char *str)
+{
+ int i;
+
+ /* FIXME: do this more efficiently? */
+
+ for (i = 0; i < d->len; i++) {
+ if (streq(str, d->val + i))
+ return i;
+ }
+
+ *d = data_append_data(*d, str, strlen(str)+1);
+ return i;
+}
+
+static void flatten_tree(struct node *tree, struct emitter *emit,
+ void *etarget, struct data *strbuf,
+ struct version_info *vi)
+{
+ struct property *prop;
+ struct node *child;
+ int seen_name_prop = 0;
+
+ emit->beginnode(etarget, tree->labels);
+
+ if (vi->flags & FTF_FULLPATH)
+ emit->string(etarget, tree->fullpath, 0);
+ else
+ emit->string(etarget, tree->name, 0);
+
+ emit->align(etarget, sizeof(cell_t));
+
+ for_each_property(tree, prop) {
+ int nameoff;
+
+ if (streq(prop->name, "name"))
+ seen_name_prop = 1;
+
+ nameoff = stringtable_insert(strbuf, prop->name);
+
+ emit->property(etarget, prop->labels);
+ emit->cell(etarget, prop->val.len);
+ emit->cell(etarget, nameoff);
+
+ if ((vi->flags & FTF_VARALIGN) && (prop->val.len >= 8))
+ emit->align(etarget, 8);
+
+ emit->data(etarget, prop->val);
+ emit->align(etarget, sizeof(cell_t));
+ }
+
+ if ((vi->flags & FTF_NAMEPROPS) && !seen_name_prop) {
+ emit->property(etarget, NULL);
+ emit->cell(etarget, tree->basenamelen+1);
+ emit->cell(etarget, stringtable_insert(strbuf, "name"));
+
+ if ((vi->flags & FTF_VARALIGN) && ((tree->basenamelen+1) >= 8))
+ emit->align(etarget, 8);
+
+ emit->string(etarget, tree->name, tree->basenamelen);
+ emit->align(etarget, sizeof(cell_t));
+ }
+
+ for_each_child(tree, child) {
+ flatten_tree(child, emit, etarget, strbuf, vi);
+ }
+
+ emit->endnode(etarget, tree->labels);
+}
+
+static struct data flatten_reserve_list(struct reserve_info *reservelist,
+ struct version_info *vi)
+{
+ struct reserve_info *re;
+ struct data d = empty_data;
+
+ for (re = reservelist; re; re = re->next) {
+ d = data_append_re(d, &re->re);
+ }
+
+ return d;
+}
+
+static void make_fdt_header(struct fdt_header *fdt,
+ struct version_info *vi,
+ int reservesize, int dtsize, int strsize,
+ int boot_cpuid_phys)
+{
+ int reserve_off;
+
+ reservesize += sizeof(struct fdt_reserve_entry);
+
+ memset(fdt, 0xff, sizeof(*fdt));
+
+ fdt->magic = cpu_to_fdt32(FDT_MAGIC);
+ fdt->version = cpu_to_fdt32(vi->version);
+ fdt->last_comp_version = cpu_to_fdt32(vi->last_comp_version);
+
+ /* Reserve map should be doubleword aligned */
+ reserve_off = ALIGN(vi->hdr_size, 8);
+
+ fdt->off_mem_rsvmap = cpu_to_fdt32(reserve_off);
+ fdt->off_dt_struct = cpu_to_fdt32(reserve_off + reservesize);
+ fdt->off_dt_strings = cpu_to_fdt32(reserve_off + reservesize
+ + dtsize);
+ fdt->totalsize = cpu_to_fdt32(reserve_off + reservesize + dtsize + strsize);
+
+ if (vi->flags & FTF_BOOTCPUID)
+ fdt->boot_cpuid_phys = cpu_to_fdt32(boot_cpuid_phys);
+ if (vi->flags & FTF_STRTABSIZE)
+ fdt->size_dt_strings = cpu_to_fdt32(strsize);
+ if (vi->flags & FTF_STRUCTSIZE)
+ fdt->size_dt_struct = cpu_to_fdt32(dtsize);
+}
+
+void* dt_to_blob_buf(off_t* size, struct boot_info *bi, int version)
+{
+ struct version_info *vi = NULL;
+ int i;
+ struct data blob = empty_data;
+ struct data reservebuf = empty_data;
+ struct data dtbuf = empty_data;
+ struct data strbuf = empty_data;
+ struct fdt_header fdt;
+ int padlen = 0;
+
+ for (i = 0; i < ARRAY_SIZE(version_table); i++) {
+ if (version_table[i].version == version)
+ vi = &version_table[i];
+ }
+
+ if (!vi)
+ die("Unknown device tree blob version %d\n", version);
+
+ flatten_tree(bi->dt, &bin_emitter, &dtbuf, &strbuf, vi);
+ bin_emit_cell(&dtbuf, FDT_END);
+
+ reservebuf = flatten_reserve_list(bi->reservelist, vi);
+
+ /* Make header */
+ make_fdt_header(&fdt, vi, reservebuf.len, dtbuf.len, strbuf.len,
+ bi->boot_cpuid_phys);
+
+ if (padlen > 0) {
+ int tsize = fdt32_to_cpu(fdt.totalsize);
+ tsize += padlen;
+ fdt.totalsize = cpu_to_fdt32(tsize);
+ }
+
+ /*
+ * Assemble the blob: start with the header, add with alignment
+ * the reserve buffer, add the reserve map terminating zeroes,
+ * the device tree itself, and finally the strings.
+ */
+ blob = data_append_data(blob, &fdt, vi->hdr_size);
+ blob = data_append_align(blob, 8);
+ blob = data_merge(blob, reservebuf);
+ blob = data_append_zeroes(blob, sizeof(struct fdt_reserve_entry));
+ blob = data_merge(blob, dtbuf);
+ blob = data_merge(blob, strbuf);
+
+ *size = blob.len;
+
+ return blob.val;
+}
+
+
+struct inbuf {
+ char *base, *limit, *ptr;
+};
+
+static void inbuf_init(struct inbuf *inb, void *base, void *limit)
+{
+ inb->base = base;
+ inb->limit = limit;
+ inb->ptr = inb->base;
+}
+
+static void flat_read_chunk(struct inbuf *inb, void *p, int len)
+{
+ if ((inb->ptr + len) > inb->limit)
+ die("Premature end of data parsing flat device tree\n");
+
+ memcpy(p, inb->ptr, len);
+
+ inb->ptr += len;
+}
+
+static uint32_t flat_read_word(struct inbuf *inb)
+{
+ uint32_t val;
+
+ assert(((inb->ptr - inb->base) % sizeof(val)) == 0);
+
+ flat_read_chunk(inb, &val, sizeof(val));
+
+ return fdt32_to_cpu(val);
+}
+
+static void flat_realign(struct inbuf *inb, int align)
+{
+ int off = inb->ptr - inb->base;
+
+ inb->ptr = inb->base + ALIGN(off, align);
+ if (inb->ptr > inb->limit)
+ die("Premature end of data parsing flat device tree\n");
+}
+
+static char *flat_read_string(struct inbuf *inb)
+{
+ int len = 0;
+ const char *p = inb->ptr;
+ char *str;
+
+ do {
+ if (p >= inb->limit)
+ die("Premature end of data parsing flat device tree\n");
+ len++;
+ } while ((*p++) != '\0');
+
+ str = xstrdup(inb->ptr);
+
+ inb->ptr += len;
+
+ flat_realign(inb, sizeof(uint32_t));
+
+ return str;
+}
+
+static struct data flat_read_data(struct inbuf *inb, int len)
+{
+ struct data d = empty_data;
+
+ if (len == 0)
+ return empty_data;
+
+ d = data_grow_for(d, len);
+ d.len = len;
+
+ flat_read_chunk(inb, d.val, len);
+
+ flat_realign(inb, sizeof(uint32_t));
+
+ return d;
+}
+
+static char *flat_read_stringtable(struct inbuf *inb, int offset)
+{
+ const char *p;
+
+ p = inb->base + offset;
+ while (1) {
+ if (p >= inb->limit || p < inb->base)
+ die("String offset %d overruns string table\n",
+ offset);
+
+ if (*p == '\0')
+ break;
+
+ p++;
+ }
+
+ return xstrdup(inb->base + offset);
+}
+
+static struct property *flat_read_property(struct inbuf *dtbuf,
+ struct inbuf *strbuf, int flags)
+{
+ uint32_t proplen, stroff;
+ char *name;
+ struct data val;
+
+ proplen = flat_read_word(dtbuf);
+ stroff = flat_read_word(dtbuf);
+
+ name = flat_read_stringtable(strbuf, stroff);
+
+ if ((flags & FTF_VARALIGN) && (proplen >= 8))
+ flat_realign(dtbuf, 8);
+
+ val = flat_read_data(dtbuf, proplen);
+
+ return build_property(name, val);
+}
+
+
+static struct reserve_info *flat_read_mem_reserve(struct inbuf *inb)
+{
+ struct reserve_info *reservelist = NULL;
+ struct reserve_info *new;
+ struct fdt_reserve_entry re;
+
+ /*
+ * Each entry is a pair of u64 (addr, size) values for 4 cell_t's.
+ * List terminates at an entry with size equal to zero.
+ *
+ * First pass, count entries.
+ */
+ while (1) {
+ flat_read_chunk(inb, &re, sizeof(re));
+ re.address = fdt64_to_cpu(re.address);
+ re.size = fdt64_to_cpu(re.size);
+ if (re.size == 0)
+ break;
+
+ new = build_reserve_entry(re.address, re.size);
+ reservelist = add_reserve_entry(reservelist, new);
+ }
+
+ return reservelist;
+}
+
+
+static char *nodename_from_path(const char *ppath, const char *cpath)
+{
+ int plen;
+
+ plen = strlen(ppath);
+
+ if (!strneq(ppath, cpath, plen))
+ die("Path \"%s\" is not valid as a child of \"%s\"\n",
+ cpath, ppath);
+
+ /* root node is a special case */
+ if (!streq(ppath, "/"))
+ plen++;
+
+ return xstrdup(cpath + plen);
+}
+
+static struct node *unflatten_tree(struct inbuf *dtbuf,
+ struct inbuf *strbuf,
+ const char *parent_flatname, int flags)
+{
+ struct node *node;
+ char *flatname;
+ uint32_t val;
+
+ node = build_node(NULL, NULL);
+
+ flatname = flat_read_string(dtbuf);
+
+ if (flags & FTF_FULLPATH)
+ node->name = nodename_from_path(parent_flatname, flatname);
+ else
+ node->name = flatname;
+
+ do {
+ struct property *prop;
+ struct node *child;
+
+ val = flat_read_word(dtbuf);
+ switch (val) {
+ case FDT_PROP:
+ if (node->children)
+ fprintf(stderr, "Warning: Flat tree input has "
+ "subnodes preceding a property.\n");
+ prop = flat_read_property(dtbuf, strbuf, flags);
+ add_property(node, prop);
+ break;
+
+ case FDT_BEGIN_NODE:
+ child = unflatten_tree(dtbuf,strbuf, flatname, flags);
+ add_child(node, child);
+ break;
+
+ case FDT_END_NODE:
+ break;
+
+ case FDT_END:
+ die("Premature FDT_END in device tree blob\n");
+ break;
+
+ case FDT_NOP:
+ if (!(flags & FTF_NOPS))
+ fprintf(stderr, "Warning: NOP tag found in flat tree"
+ " version <16\n");
+
+ /* Ignore */
+ break;
+
+ default:
+ die("Invalid opcode word %08x in device tree blob\n",
+ val);
+ }
+ } while (val != FDT_END_NODE);
+
+ return node;
+}
+
+
+struct boot_info *dt_from_blob(const char *fname)
+{
+ FILE *f;
+ uint32_t magic, totalsize, version, size_dt, boot_cpuid_phys;
+ uint32_t off_dt, off_str, off_mem_rsvmap;
+ int rc;
+ char *blob;
+ struct fdt_header *fdt;
+ char *p;
+ struct inbuf dtbuf, strbuf;
+ struct inbuf memresvbuf;
+ int sizeleft;
+ struct reserve_info *reservelist;
+ struct node *tree;
+ uint32_t val;
+ int flags = 0;
+
+ f = srcfile_relative_open(fname, NULL);
+
+ rc = fread(&magic, sizeof(magic), 1, f);
+ if (ferror(f))
+ die("Error reading DT blob magic number: %s\n",
+ strerror(errno));
+ if (rc < 1) {
+ if (feof(f))
+ die("EOF reading DT blob magic number\n");
+ else
+ die("Mysterious short read reading magic number\n");
+ }
+
+ magic = fdt32_to_cpu(magic);
+ if (magic != FDT_MAGIC)
+ die("Blob has incorrect magic number\n");
+
+ rc = fread(&totalsize, sizeof(totalsize), 1, f);
+ if (ferror(f))
+ die("Error reading DT blob size: %s\n", strerror(errno));
+ if (rc < 1) {
+ if (feof(f))
+ die("EOF reading DT blob size\n");
+ else
+ die("Mysterious short read reading blob size\n");
+ }
+
+ totalsize = fdt32_to_cpu(totalsize);
+ if (totalsize < FDT_V1_SIZE)
+ die("DT blob size (%d) is too small\n", totalsize);
+
+ blob = xmalloc(totalsize);
+
+ fdt = (struct fdt_header *)blob;
+ fdt->magic = cpu_to_fdt32(magic);
+ fdt->totalsize = cpu_to_fdt32(totalsize);
+
+ sizeleft = totalsize - sizeof(magic) - sizeof(totalsize);
+ p = blob + sizeof(magic) + sizeof(totalsize);
+
+ while (sizeleft) {
+ if (feof(f))
+ die("EOF before reading %d bytes of DT blob\n",
+ totalsize);
+
+ rc = fread(p, 1, sizeleft, f);
+ if (ferror(f))
+ die("Error reading DT blob: %s\n",
+ strerror(errno));
+
+ sizeleft -= rc;
+ p += rc;
+ }
+
+ off_dt = fdt32_to_cpu(fdt->off_dt_struct);
+ off_str = fdt32_to_cpu(fdt->off_dt_strings);
+ off_mem_rsvmap = fdt32_to_cpu(fdt->off_mem_rsvmap);
+ version = fdt32_to_cpu(fdt->version);
+ boot_cpuid_phys = fdt32_to_cpu(fdt->boot_cpuid_phys);
+
+ if (off_mem_rsvmap >= totalsize)
+ die("Mem Reserve structure offset exceeds total size\n");
+
+ if (off_dt >= totalsize)
+ die("DT structure offset exceeds total size\n");
+
+ if (off_str > totalsize)
+ die("String table offset exceeds total size\n");
+
+ if (version >= 3) {
+ uint32_t size_str = fdt32_to_cpu(fdt->size_dt_strings);
+ if (off_str+size_str > totalsize)
+ die("String table extends past total size\n");
+ inbuf_init(&strbuf, blob + off_str, blob + off_str + size_str);
+ } else {
+ inbuf_init(&strbuf, blob + off_str, blob + totalsize);
+ }
+
+ if (version >= 17) {
+ size_dt = fdt32_to_cpu(fdt->size_dt_struct);
+ if (off_dt+size_dt > totalsize)
+ die("Structure block extends past total size\n");
+ }
+
+ if (version < 16) {
+ flags |= FTF_FULLPATH | FTF_NAMEPROPS | FTF_VARALIGN;
+ } else {
+ flags |= FTF_NOPS;
+ }
+
+ inbuf_init(&memresvbuf,
+ blob + off_mem_rsvmap, blob + totalsize);
+ inbuf_init(&dtbuf, blob + off_dt, blob + totalsize);
+
+ reservelist = flat_read_mem_reserve(&memresvbuf);
+
+ val = flat_read_word(&dtbuf);
+
+ if (val != FDT_BEGIN_NODE)
+ die("Device tree blob doesn't begin with FDT_BEGIN_NODE (begins with 0x%08x)\n", val);
+
+ tree = unflatten_tree(&dtbuf, &strbuf, "", flags);
+
+ val = flat_read_word(&dtbuf);
+ if (val != FDT_END)
+ die("Device tree blob doesn't end with FDT_END\n");
+
+ free(blob);
+
+ fclose(f);
+
+ return build_boot_info(reservelist, tree, boot_cpuid_phys);
+}
diff --git a/util_lib/dtc/fstree.c b/util_lib/dtc/fstree.c
new file mode 100644
index 0000000..f377453
--- /dev/null
+++ b/util_lib/dtc/fstree.c
@@ -0,0 +1,91 @@
+/*
+ * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include "dtc.h"
+
+#include <dirent.h>
+#include <sys/stat.h>
+
+static struct node *read_fstree(const char *dirname)
+{
+ DIR *d;
+ struct dirent *de;
+ struct stat st;
+ struct node *tree;
+
+ d = opendir(dirname);
+ if (!d)
+ die("Couldn't opendir() \"%s\": %s\n", dirname, strerror(errno));
+
+ tree = build_node(NULL, NULL);
+
+ while ((de = readdir(d)) != NULL) {
+ char *tmpnam;
+
+ if (streq(de->d_name, ".")
+ || streq(de->d_name, ".."))
+ continue;
+
+ tmpnam = join_path(dirname, de->d_name);
+
+ if (lstat(tmpnam, &st) < 0)
+ die("stat(%s): %s\n", tmpnam, strerror(errno));
+
+ if (S_ISREG(st.st_mode)) {
+ struct property *prop;
+ FILE *pfile;
+
+ pfile = fopen(tmpnam, "r");
+ if (! pfile) {
+ fprintf(stderr,
+ "WARNING: Cannot open %s: %s\n",
+ tmpnam, strerror(errno));
+ } else {
+ prop = build_property(xstrdup(de->d_name),
+ data_copy_file(pfile,
+ st.st_size));
+ add_property(tree, prop);
+ fclose(pfile);
+ }
+ } else if (S_ISDIR(st.st_mode)) {
+ struct node *newchild;
+
+ newchild = read_fstree(tmpnam);
+ newchild = name_node(newchild, xstrdup(de->d_name));
+ add_child(tree, newchild);
+ }
+
+ free(tmpnam);
+ }
+
+ closedir(d);
+ return tree;
+}
+
+struct boot_info *dt_from_fs(const char *dirname)
+{
+ struct node *tree;
+
+ tree = read_fstree(dirname);
+ tree = name_node(tree, "");
+
+ return build_boot_info(NULL, tree, guess_boot_cpuid(tree));
+}
+
diff --git a/util_lib/dtc/livetree.c b/util_lib/dtc/livetree.c
new file mode 100644
index 0000000..1420804
--- /dev/null
+++ b/util_lib/dtc/livetree.c
@@ -0,0 +1,579 @@
+/*
+ * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include "dtc.h"
+
+/*
+ * Tree building functions
+ */
+
+void add_label(struct label **labels, char *label)
+{
+ struct label *new;
+
+ /* Make sure the label isn't already there */
+ for_each_label(*labels, new)
+ if (streq(new->label, label))
+ return;
+
+ new = xmalloc(sizeof(*new));
+ new->label = label;
+ new->next = *labels;
+ *labels = new;
+}
+
+struct property *build_property(char *name, struct data val)
+{
+ struct property *new = xmalloc(sizeof(*new));
+
+ memset(new, 0, sizeof(*new));
+
+ new->name = name;
+ new->val = val;
+
+ return new;
+}
+
+struct property *chain_property(struct property *first, struct property *list)
+{
+ assert(first->next == NULL);
+
+ first->next = list;
+ return first;
+}
+
+struct property *reverse_properties(struct property *first)
+{
+ struct property *p = first;
+ struct property *head = NULL;
+ struct property *next;
+
+ while (p) {
+ next = p->next;
+ p->next = head;
+ head = p;
+ p = next;
+ }
+ return head;
+}
+
+struct node *build_node(struct property *proplist, struct node *children)
+{
+ struct node *new = xmalloc(sizeof(*new));
+ struct node *child;
+
+ memset(new, 0, sizeof(*new));
+
+ new->proplist = reverse_properties(proplist);
+ new->children = children;
+
+ for_each_child(new, child) {
+ child->parent = new;
+ }
+
+ return new;
+}
+
+struct node *name_node(struct node *node, char *name)
+{
+ assert(node->name == NULL);
+
+ node->name = name;
+
+ return node;
+}
+
+struct node *merge_nodes(struct node *old_node, struct node *new_node)
+{
+ struct property *new_prop, *old_prop;
+ struct node *new_child, *old_child;
+ struct label *l;
+
+ /* Add new node labels to old node */
+ for_each_label(new_node->labels, l)
+ add_label(&old_node->labels, l->label);
+
+ /* Move properties from the new node to the old node. If there
+ * is a collision, replace the old value with the new */
+ while (new_node->proplist) {
+ /* Pop the property off the list */
+ new_prop = new_node->proplist;
+ new_node->proplist = new_prop->next;
+ new_prop->next = NULL;
+
+ /* Look for a collision, set new value if there is */
+ for_each_property(old_node, old_prop) {
+ if (streq(old_prop->name, new_prop->name)) {
+ /* Add new labels to old property */
+ for_each_label(new_prop->labels, l)
+ add_label(&old_prop->labels, l->label);
+
+ old_prop->val = new_prop->val;
+ free(new_prop);
+ new_prop = NULL;
+ break;
+ }
+ }
+
+ /* if no collision occurred, add property to the old node. */
+ if (new_prop)
+ add_property(old_node, new_prop);
+ }
+
+ /* Move the override child nodes into the primary node. If
+ * there is a collision, then merge the nodes. */
+ while (new_node->children) {
+ /* Pop the child node off the list */
+ new_child = new_node->children;
+ new_node->children = new_child->next_sibling;
+ new_child->parent = NULL;
+ new_child->next_sibling = NULL;
+
+ /* Search for a collision. Merge if there is */
+ for_each_child(old_node, old_child) {
+ if (streq(old_child->name, new_child->name)) {
+ merge_nodes(old_child, new_child);
+ new_child = NULL;
+ break;
+ }
+ }
+
+ /* if no collision occurred, add child to the old node. */
+ if (new_child)
+ add_child(old_node, new_child);
+ }
+
+ /* The new node contents are now merged into the old node. Free
+ * the new node. */
+ free(new_node);
+
+ return old_node;
+}
+
+struct node *chain_node(struct node *first, struct node *list)
+{
+ assert(first->next_sibling == NULL);
+
+ first->next_sibling = list;
+ return first;
+}
+
+void add_property(struct node *node, struct property *prop)
+{
+ struct property **p;
+
+ prop->next = NULL;
+
+ p = &node->proplist;
+ while (*p)
+ p = &((*p)->next);
+
+ *p = prop;
+}
+
+void add_child(struct node *parent, struct node *child)
+{
+ struct node **p;
+
+ child->next_sibling = NULL;
+ child->parent = parent;
+
+ p = &parent->children;
+ while (*p)
+ p = &((*p)->next_sibling);
+
+ *p = child;
+}
+
+struct reserve_info *build_reserve_entry(uint64_t address, uint64_t size)
+{
+ struct reserve_info *new = xmalloc(sizeof(*new));
+
+ memset(new, 0, sizeof(*new));
+
+ new->re.address = address;
+ new->re.size = size;
+
+ return new;
+}
+
+struct reserve_info *chain_reserve_entry(struct reserve_info *first,
+ struct reserve_info *list)
+{
+ assert(first->next == NULL);
+
+ first->next = list;
+ return first;
+}
+
+struct reserve_info *add_reserve_entry(struct reserve_info *list,
+ struct reserve_info *new)
+{
+ struct reserve_info *last;
+
+ new->next = NULL;
+
+ if (! list)
+ return new;
+
+ for (last = list; last->next; last = last->next)
+ ;
+
+ last->next = new;
+
+ return list;
+}
+
+struct boot_info *build_boot_info(struct reserve_info *reservelist,
+ struct node *tree, uint32_t boot_cpuid_phys)
+{
+ struct boot_info *bi;
+
+ bi = xmalloc(sizeof(*bi));
+ bi->reservelist = reservelist;
+ bi->dt = tree;
+ bi->boot_cpuid_phys = boot_cpuid_phys;
+
+ return bi;
+}
+
+/*
+ * Tree accessor functions
+ */
+
+const char *get_unitname(struct node *node)
+{
+ if (node->name[node->basenamelen] == '\0')
+ return "";
+ else
+ return node->name + node->basenamelen + 1;
+}
+
+struct property *get_property(struct node *node, const char *propname)
+{
+ struct property *prop;
+
+ for_each_property(node, prop)
+ if (streq(prop->name, propname))
+ return prop;
+
+ return NULL;
+}
+
+cell_t propval_cell(struct property *prop)
+{
+ assert(prop->val.len == sizeof(cell_t));
+ return fdt32_to_cpu(*((cell_t *)prop->val.val));
+}
+
+struct property *get_property_by_label(struct node *tree, const char *label,
+ struct node **node)
+{
+ struct property *prop;
+ struct node *c;
+
+ *node = tree;
+
+ for_each_property(tree, prop) {
+ struct label *l;
+
+ for_each_label(prop->labels, l)
+ if (streq(l->label, label))
+ return prop;
+ }
+
+ for_each_child(tree, c) {
+ prop = get_property_by_label(c, label, node);
+ if (prop)
+ return prop;
+ }
+
+ *node = NULL;
+ return NULL;
+}
+
+struct marker *get_marker_label(struct node *tree, const char *label,
+ struct node **node, struct property **prop)
+{
+ struct marker *m;
+ struct property *p;
+ struct node *c;
+
+ *node = tree;
+
+ for_each_property(tree, p) {
+ *prop = p;
+ m = p->val.markers;
+ for_each_marker_of_type(m, LABEL)
+ if (streq(m->ref, label))
+ return m;
+ }
+
+ for_each_child(tree, c) {
+ m = get_marker_label(c, label, node, prop);
+ if (m)
+ return m;
+ }
+
+ *prop = NULL;
+ *node = NULL;
+ return NULL;
+}
+
+struct node *get_subnode(struct node *node, const char *nodename)
+{
+ struct node *child;
+
+ for_each_child(node, child)
+ if (streq(child->name, nodename))
+ return child;
+
+ return NULL;
+}
+
+struct node *get_node_by_path(struct node *tree, const char *path)
+{
+ const char *p;
+ struct node *child;
+
+ if (!path || ! (*path))
+ return tree;
+
+ while (path[0] == '/')
+ path++;
+
+ p = strchr(path, '/');
+
+ for_each_child(tree, child) {
+ if (p && strneq(path, child->name, p-path))
+ return get_node_by_path(child, p+1);
+ else if (!p && streq(path, child->name))
+ return child;
+ }
+
+ return NULL;
+}
+
+struct node *get_node_by_label(struct node *tree, const char *label)
+{
+ struct node *child, *node;
+ struct label *l;
+
+ assert(label && (strlen(label) > 0));
+
+ for_each_label(tree->labels, l)
+ if (streq(l->label, label))
+ return tree;
+
+ for_each_child(tree, child) {
+ node = get_node_by_label(child, label);
+ if (node)
+ return node;
+ }
+
+ return NULL;
+}
+
+struct node *get_node_by_phandle(struct node *tree, cell_t phandle)
+{
+ struct node *child, *node;
+
+ assert((phandle != 0) && (phandle != -1));
+
+ if (tree->phandle == phandle)
+ return tree;
+
+ for_each_child(tree, child) {
+ node = get_node_by_phandle(child, phandle);
+ if (node)
+ return node;
+ }
+
+ return NULL;
+}
+
+struct node *get_node_by_ref(struct node *tree, const char *ref)
+{
+ if (ref[0] == '/')
+ return get_node_by_path(tree, ref);
+ else
+ return get_node_by_label(tree, ref);
+}
+
+
+uint32_t guess_boot_cpuid(struct node *tree)
+{
+ struct node *cpus, *bootcpu;
+ struct property *reg;
+
+ cpus = get_node_by_path(tree, "/cpus");
+ if (!cpus)
+ return 0;
+
+
+ bootcpu = cpus->children;
+ if (!bootcpu)
+ return 0;
+
+ reg = get_property(bootcpu, "reg");
+ if (!reg || (reg->val.len != sizeof(uint32_t)))
+ return 0;
+
+ /* FIXME: Sanity check node? */
+
+ return propval_cell(reg);
+}
+
+static int cmp_reserve_info(const void *ax, const void *bx)
+{
+ const struct reserve_info *a, *b;
+
+ a = *((const struct reserve_info * const *)ax);
+ b = *((const struct reserve_info * const *)bx);
+
+ if (a->re.address < b->re.address)
+ return -1;
+ else if (a->re.address > b->re.address)
+ return 1;
+ else if (a->re.size < b->re.size)
+ return -1;
+ else if (a->re.size > b->re.size)
+ return 1;
+ else
+ return 0;
+}
+
+static void sort_reserve_entries(struct boot_info *bi)
+{
+ struct reserve_info *ri, **tbl;
+ int n = 0, i = 0;
+
+ for (ri = bi->reservelist;
+ ri;
+ ri = ri->next)
+ n++;
+
+ if (n == 0)
+ return;
+
+ tbl = xmalloc(n * sizeof(*tbl));
+
+ for (ri = bi->reservelist;
+ ri;
+ ri = ri->next)
+ tbl[i++] = ri;
+
+ qsort(tbl, n, sizeof(*tbl), cmp_reserve_info);
+
+ bi->reservelist = tbl[0];
+ for (i = 0; i < (n-1); i++)
+ tbl[i]->next = tbl[i+1];
+ tbl[n-1]->next = NULL;
+
+ free(tbl);
+}
+
+static int cmp_prop(const void *ax, const void *bx)
+{
+ const struct property *a, *b;
+
+ a = *((const struct property * const *)ax);
+ b = *((const struct property * const *)bx);
+
+ return strcmp(a->name, b->name);
+}
+
+static void sort_properties(struct node *node)
+{
+ int n = 0, i = 0;
+ struct property *prop, **tbl;
+
+ for_each_property(node, prop)
+ n++;
+
+ if (n == 0)
+ return;
+
+ tbl = xmalloc(n * sizeof(*tbl));
+
+ for_each_property(node, prop)
+ tbl[i++] = prop;
+
+ qsort(tbl, n, sizeof(*tbl), cmp_prop);
+
+ node->proplist = tbl[0];
+ for (i = 0; i < (n-1); i++)
+ tbl[i]->next = tbl[i+1];
+ tbl[n-1]->next = NULL;
+
+ free(tbl);
+}
+
+static int cmp_subnode(const void *ax, const void *bx)
+{
+ const struct node *a, *b;
+
+ a = *((const struct node * const *)ax);
+ b = *((const struct node * const *)bx);
+
+ return strcmp(a->name, b->name);
+}
+
+static void sort_subnodes(struct node *node)
+{
+ int n = 0, i = 0;
+ struct node *subnode, **tbl;
+
+ for_each_child(node, subnode)
+ n++;
+
+ if (n == 0)
+ return;
+
+ tbl = xmalloc(n * sizeof(*tbl));
+
+ for_each_child(node, subnode)
+ tbl[i++] = subnode;
+
+ qsort(tbl, n, sizeof(*tbl), cmp_subnode);
+
+ node->children = tbl[0];
+ for (i = 0; i < (n-1); i++)
+ tbl[i]->next_sibling = tbl[i+1];
+ tbl[n-1]->next_sibling = NULL;
+
+ free(tbl);
+}
+
+static void sort_node(struct node *node)
+{
+ struct node *c;
+
+ sort_properties(node);
+ sort_subnodes(node);
+ for_each_child(node, c)
+ sort_node(c);
+}
+
+void sort_tree(struct boot_info *bi)
+{
+ sort_reserve_entries(bi);
+ sort_node(bi->dt);
+}
diff --git a/util_lib/dtc/srcpos.c b/util_lib/dtc/srcpos.c
new file mode 100644
index 0000000..36a38e9
--- /dev/null
+++ b/util_lib/dtc/srcpos.c
@@ -0,0 +1,252 @@
+/*
+ * Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#define _GNU_SOURCE
+
+#include <stdio.h>
+
+#include "dtc.h"
+#include "srcpos.h"
+
+
+static char *dirname(const char *path)
+{
+ const char *slash = strrchr(path, '/');
+
+ if (slash) {
+ int len = slash - path;
+ char *dir = xmalloc(len + 1);
+
+ memcpy(dir, path, len);
+ dir[len] = '\0';
+ return dir;
+ }
+ return NULL;
+}
+
+FILE *depfile; /* = NULL */
+struct srcfile_state *current_srcfile; /* = NULL */
+
+/* Detect infinite include recursion. */
+#define MAX_SRCFILE_DEPTH (100)
+static int srcfile_depth; /* = 0 */
+
+FILE *srcfile_relative_open(const char *fname, char **fullnamep)
+{
+ FILE *f;
+ char *fullname;
+
+ if (streq(fname, "-")) {
+ f = stdin;
+ fullname = xstrdup("<stdin>");
+ } else {
+ if (!current_srcfile || !current_srcfile->dir
+ || (fname[0] == '/'))
+ fullname = xstrdup(fname);
+ else
+ fullname = join_path(current_srcfile->dir, fname);
+
+ f = fopen(fullname, "r");
+ if (!f)
+ die("Couldn't open \"%s\": %s\n", fname,
+ strerror(errno));
+ }
+
+ if (depfile)
+ fprintf(depfile, " %s", fullname);
+
+ if (fullnamep)
+ *fullnamep = fullname;
+ else
+ free(fullname);
+
+ return f;
+}
+
+void srcfile_push(const char *fname)
+{
+ struct srcfile_state *srcfile;
+
+ if (srcfile_depth++ >= MAX_SRCFILE_DEPTH)
+ die("Includes nested too deeply");
+
+ srcfile = xmalloc(sizeof(*srcfile));
+
+ srcfile->f = srcfile_relative_open(fname, &srcfile->name);
+ srcfile->dir = dirname(srcfile->name);
+ srcfile->prev = current_srcfile;
+
+ srcfile->lineno = 1;
+ srcfile->colno = 1;
+
+ current_srcfile = srcfile;
+}
+
+int srcfile_pop(void)
+{
+ struct srcfile_state *srcfile = current_srcfile;
+
+ assert(srcfile);
+
+ current_srcfile = srcfile->prev;
+
+ if (fclose(srcfile->f))
+ die("Error closing \"%s\": %s\n", srcfile->name,
+ strerror(errno));
+
+ /* FIXME: We allow the srcfile_state structure to leak,
+ * because it could still be referenced from a location
+ * variable being carried through the parser somewhere. To
+ * fix this we could either allocate all the files from a
+ * table, or use a pool allocator. */
+
+ return current_srcfile ? 1 : 0;
+}
+
+/*
+ * The empty source position.
+ */
+
+struct srcpos srcpos_empty = {
+ .first_line = 0,
+ .first_column = 0,
+ .last_line = 0,
+ .last_column = 0,
+ .file = NULL,
+};
+
+#define TAB_SIZE 8
+
+void srcpos_update(struct srcpos *pos, const char *text, int len)
+{
+ int i;
+
+ pos->file = current_srcfile;
+
+ pos->first_line = current_srcfile->lineno;
+ pos->first_column = current_srcfile->colno;
+
+ for (i = 0; i < len; i++)
+ if (text[i] == '\n') {
+ current_srcfile->lineno++;
+ current_srcfile->colno = 1;
+ } else if (text[i] == '\t') {
+ current_srcfile->colno =
+ ALIGN(current_srcfile->colno, TAB_SIZE);
+ } else {
+ current_srcfile->colno++;
+ }
+
+ pos->last_line = current_srcfile->lineno;
+ pos->last_column = current_srcfile->colno;
+}
+
+struct srcpos *
+srcpos_copy(struct srcpos *pos)
+{
+ struct srcpos *pos_new;
+
+ pos_new = xmalloc(sizeof(struct srcpos));
+ memcpy(pos_new, pos, sizeof(struct srcpos));
+
+ return pos_new;
+}
+
+
+
+void
+srcpos_dump(struct srcpos *pos)
+{
+ printf("file : \"%s\"\n",
+ pos->file ? (char *) pos->file : "<no file>");
+ printf("first_line : %d\n", pos->first_line);
+ printf("first_column: %d\n", pos->first_column);
+ printf("last_line : %d\n", pos->last_line);
+ printf("last_column : %d\n", pos->last_column);
+ printf("file : %s\n", pos->file->name);
+}
+
+
+char *
+srcpos_string(struct srcpos *pos)
+{
+ const char *fname = "<no-file>";
+ char *pos_str;
+ int rc;
+
+ if (pos)
+ fname = pos->file->name;
+
+
+ if (pos->first_line != pos->last_line)
+ rc = asprintf(&pos_str, "%s:%d.%d-%d.%d", fname,
+ pos->first_line, pos->first_column,
+ pos->last_line, pos->last_column);
+ else if (pos->first_column != pos->last_column)
+ rc = asprintf(&pos_str, "%s:%d.%d-%d", fname,
+ pos->first_line, pos->first_column,
+ pos->last_column);
+ else
+ rc = asprintf(&pos_str, "%s:%d.%d", fname,
+ pos->first_line, pos->first_column);
+
+ if (rc == -1)
+ die("Couldn't allocate in srcpos string");
+
+ return pos_str;
+}
+
+void
+srcpos_verror(struct srcpos *pos, char const *fmt, va_list va)
+{
+ const char *srcstr;
+
+ srcstr = srcpos_string(pos);
+
+ fprintf(stdout, "Error: %s ", srcstr);
+ vfprintf(stdout, fmt, va);
+ fprintf(stdout, "\n");
+}
+
+void
+srcpos_error(struct srcpos *pos, char const *fmt, ...)
+{
+ va_list va;
+
+ va_start(va, fmt);
+ srcpos_verror(pos, fmt, va);
+ va_end(va);
+}
+
+
+void
+srcpos_warn(struct srcpos *pos, char const *fmt, ...)
+{
+ const char *srcstr;
+ va_list va;
+ va_start(va, fmt);
+
+ srcstr = srcpos_string(pos);
+
+ fprintf(stderr, "Warning: %s ", srcstr);
+ vfprintf(stderr, fmt, va);
+ fprintf(stderr, "\n");
+
+ va_end(va);
+}
diff --git a/util_lib/dtc/srcpos.h b/util_lib/dtc/srcpos.h
new file mode 100644
index 0000000..ce980ca
--- /dev/null
+++ b/util_lib/dtc/srcpos.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2007 Jon Loeliger, Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#ifndef _SRCPOS_H_
+#define _SRCPOS_H_
+
+#include <stdio.h>
+
+struct srcfile_state {
+ FILE *f;
+ char *name;
+ char *dir;
+ int lineno, colno;
+ struct srcfile_state *prev;
+};
+
+extern FILE *depfile; /* = NULL */
+extern struct srcfile_state *current_srcfile; /* = NULL */
+
+FILE *srcfile_relative_open(const char *fname, char **fullnamep);
+void srcfile_push(const char *fname);
+int srcfile_pop(void);
+
+struct srcpos {
+ int first_line;
+ int first_column;
+ int last_line;
+ int last_column;
+ struct srcfile_state *file;
+};
+
+#define YYLTYPE struct srcpos
+
+#define YYLLOC_DEFAULT(Current, Rhs, N) \
+ do { \
+ if (N) { \
+ (Current).first_line = YYRHSLOC(Rhs, 1).first_line; \
+ (Current).first_column = YYRHSLOC(Rhs, 1).first_column; \
+ (Current).last_line = YYRHSLOC(Rhs, N).last_line; \
+ (Current).last_column = YYRHSLOC (Rhs, N).last_column; \
+ (Current).file = YYRHSLOC(Rhs, N).file; \
+ } else { \
+ (Current).first_line = (Current).last_line = \
+ YYRHSLOC(Rhs, 0).last_line; \
+ (Current).first_column = (Current).last_column = \
+ YYRHSLOC(Rhs, 0).last_column; \
+ (Current).file = YYRHSLOC (Rhs, 0).file; \
+ } \
+ } while (0)
+
+
+/*
+ * Fictional source position used for IR nodes that are
+ * created without otherwise knowing a true source position.
+ * For example,constant definitions from the command line.
+ */
+extern struct srcpos srcpos_empty;
+
+extern void srcpos_update(struct srcpos *pos, const char *text, int len);
+extern struct srcpos *srcpos_copy(struct srcpos *pos);
+extern char *srcpos_string(struct srcpos *pos);
+extern void srcpos_dump(struct srcpos *pos);
+
+extern void srcpos_verror(struct srcpos *pos, char const *, va_list va)
+ __attribute__((format(printf, 2, 0)));
+extern void srcpos_error(struct srcpos *pos, char const *, ...)
+ __attribute__((format(printf, 2, 3)));
+extern void srcpos_warn(struct srcpos *pos, char const *, ...)
+ __attribute__((format(printf, 2, 3)));
+
+#endif /* _SRCPOS_H_ */
diff --git a/util_lib/dtc/util.c b/util_lib/dtc/util.c
new file mode 100644
index 0000000..d7ac27d
--- /dev/null
+++ b/util_lib/dtc/util.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+
+#include "util.h"
+
+char *xstrdup(const char *s)
+{
+ int len = strlen(s) + 1;
+ char *dup = xmalloc(len);
+
+ memcpy(dup, s, len);
+
+ return dup;
+}
+
+char *join_path(const char *path, const char *name)
+{
+ int lenp = strlen(path);
+ int lenn = strlen(name);
+ int len;
+ int needslash = 1;
+ char *str;
+
+ len = lenp + lenn + 2;
+ if ((lenp > 0) && (path[lenp-1] == '/')) {
+ needslash = 0;
+ len--;
+ }
+
+ str = xmalloc(len);
+ memcpy(str, path, lenp);
+ if (needslash) {
+ str[lenp] = '/';
+ lenp++;
+ }
+ memcpy(str+lenp, name, lenn+1);
+ return str;
+}
diff --git a/util_lib/dtc/util.h b/util_lib/dtc/util.h
new file mode 100644
index 0000000..9cead84
--- /dev/null
+++ b/util_lib/dtc/util.h
@@ -0,0 +1,56 @@
+#ifndef _UTIL_H
+#define _UTIL_H
+
+/*
+ * Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+static inline void __attribute__((noreturn)) die(char * str, ...)
+{
+ va_list ap;
+
+ va_start(ap, str);
+ fprintf(stderr, "FATAL ERROR: ");
+ vfprintf(stderr, str, ap);
+ exit(1);
+}
+
+static inline void *xmalloc(size_t len)
+{
+ void *new = malloc(len);
+
+ if (!new)
+ die("malloc() failed\n");
+
+ return new;
+}
+
+static inline void *xrealloc(void *p, size_t len)
+{
+ void *new = realloc(p, len);
+
+ if (!new)
+ die("realloc() failed (len=%d)\n", len);
+
+ return new;
+}
+
+extern char *xstrdup(const char *s);
+extern char *join_path(const char *path, const char *name);
+
+#endif /* _UTIL_H */
diff --git a/util_lib/dtc/version_gen.h b/util_lib/dtc/version_gen.h
new file mode 100644
index 0000000..6158b86
--- /dev/null
+++ b/util_lib/dtc/version_gen.h
@@ -0,0 +1 @@
+#define DTC_VERSION "DTC 1.2.0-g37c0b6a0"
--
1.7.12
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^ permalink raw reply related [flat|nested] 15+ messages in thread* [RFC PATCH 4/4] Add device tree support to the ARM platform
2012-09-05 11:43 [RFC PATCH 0/4] Add device-tree support to kexec-tools for ARM Matthew Leach
` (2 preceding siblings ...)
2012-09-05 11:44 ` [RFC PATCH 3/4] Add the dtc for device-tree manipulation Matthew Leach
@ 2012-09-05 11:44 ` Matthew Leach
2012-09-05 12:38 ` [RFC PATCH 0/4] Add device-tree support to kexec-tools for ARM Simon Horman
4 siblings, 0 replies; 15+ messages in thread
From: Matthew Leach @ 2012-09-05 11:44 UTC (permalink / raw)
To: kexec; +Cc: Matthew Leach, will.deacon
To allow newer ARM platforms to use kexec, pass device tree
information to the kernel during boot.
By default the dtb is found from /proc/device-tree. A user can specify
a dtb file or use legacy ATAGs
Signed-off-by: Matthew Leach <matthew.leach@arm.com>
---
kexec/arch/arm/Makefile | 10 +++
kexec/arch/arm/include/arch/options.h | 6 +-
kexec/arch/arm/kexec-zImage-arm.c | 140 ++++++++++++++++++++++++++++++++--
3 files changed, 150 insertions(+), 6 deletions(-)
diff --git a/kexec/arch/arm/Makefile b/kexec/arch/arm/Makefile
index 288ec33..f25ce15 100644
--- a/kexec/arch/arm/Makefile
+++ b/kexec/arch/arm/Makefile
@@ -1,12 +1,22 @@
#
# kexec arm (linux booting linux)
#
+include $(srcdir)/util_lib/dtc/Makefile.dtc
+
arm_KEXEC_SRCS= kexec/arch/arm/kexec-elf-rel-arm.c
arm_KEXEC_SRCS+= kexec/arch/arm/kexec-zImage-arm.c
arm_KEXEC_SRCS+= kexec/arch/arm/kexec-uImage-arm.c
arm_KEXEC_SRCS+= kexec/arch/arm/kexec-arm.c
arm_KEXEC_SRCS+= kexec/arch/arm/crashdump-arm.c
+libfdt_SRCS += $(LIBFDT_SRCS:%=util_lib/libfdt/%)
+dtc_SRCS += $(DTC_SRCS:%=util_lib/dtc/%)
+
+arm_KEXEC_SRCS+= $(libfdt_SRCS)
+arm_KEXEC_SRCS+= $(dtc_SRCS)
+
+CPPFLAGS+=-I$(srcdir)/util_lib/libfdt
+
arm_UIMAGE = kexec/kexec-uImage.c
arm_PHYS_TO_VIRT = kexec/arch/arm/phys_to_virt.c
diff --git a/kexec/arch/arm/include/arch/options.h b/kexec/arch/arm/include/arch/options.h
index d89c91f..b355c26 100644
--- a/kexec/arch/arm/include/arch/options.h
+++ b/kexec/arch/arm/include/arch/options.h
@@ -5,6 +5,8 @@
#define OPT_APPEND 'a'
#define OPT_RAMDISK 'r'
+#define OPT_DTB (OPT_ARCH_MAX+0)
+#define OPT_ATAGS (OPT_ARCH_MAX+1)
/* Options relevant to the architecture (excluding loader-specific ones),
* in this case none:
@@ -33,7 +35,9 @@
{ "command-line", 1, 0, OPT_APPEND }, \
{ "append", 1, 0, OPT_APPEND }, \
{ "initrd", 1, 0, OPT_RAMDISK }, \
- { "ramdisk", 1, 0, OPT_RAMDISK },
+ { "ramdisk", 1, 0, OPT_RAMDISK }, \
+ { "dtb", 1, 0, OPT_DTB }, \
+ { "atags", 0, 0, OPT_ATAGS },
#define KEXEC_ALL_OPT_STR KEXEC_ARCH_OPT_STR "a:r:"
diff --git a/kexec/arch/arm/kexec-zImage-arm.c b/kexec/arch/arm/kexec-zImage-arm.c
index 88a6c29..74028b8 100644
--- a/kexec/arch/arm/kexec-zImage-arm.c
+++ b/kexec/arch/arm/kexec-zImage-arm.c
@@ -13,6 +13,8 @@
#include <unistd.h>
#include <getopt.h>
#include <unistd.h>
+#include <dtc.h>
+#include <libfdt.h>
#include <arch/options.h>
#include "../../kexec.h"
#include "../../kexec-syscall.h"
@@ -96,6 +98,8 @@ void zImage_arm_usage(void)
" --append=STRING Set the kernel command line to STRING.\n"
" --initrd=FILE Use FILE as the kernel's initial ramdisk.\n"
" --ramdisk=FILE Use FILE as the kernel's initial ramdisk.\n"
+ " --dtb=FILE Use FILE as the fdt blob.\n"
+ " --atags Use ATAGs instead of device-tree.\n"
);
}
@@ -208,6 +212,63 @@ int atag_arm_load(struct kexec_info *info, unsigned long base,
return 0;
}
+void dtb_fixup_chosen_node(char **dtb_buf, off_t *buf_sz, const char *command_line,
+ unsigned long initrd_start, unsigned long initrd_end)
+{
+ if (command_line || initrd_start != initrd_end) {
+ int chosen_offset;
+ int root_offset;
+ int command_line_len = strlen(command_line);
+ off_t new_buf_sz = *buf_sz + command_line_len + 0x50; /* extra space for new node */
+ void *new_buf = malloc(new_buf_sz);
+
+ fdt_open_into(*dtb_buf, new_buf, new_buf_sz);
+
+ root_offset = fdt_path_offset(new_buf, "/");
+ chosen_offset = fdt_path_offset(new_buf, "/chosen");
+ if (chosen_offset == -FDT_ERR_NOTFOUND) {
+ chosen_offset = fdt_add_subnode(new_buf, root_offset, "chosen");
+ }
+ if (chosen_offset < 0) {
+ fprintf(stderr, "Warning: failed to find the chosen node, a specified command line and"
+ " initrd will not be set.\n");
+ free(new_buf);
+ return;
+ }
+
+ /*
+ * Add the 'bootargs' proerpty to the chosen node if the command
+ * line is specified.
+ */
+ if (command_line) {
+ if (fdt_setprop_string(new_buf, chosen_offset,
+ "bootargs", command_line) < 0) {
+ fprintf(stderr, "Warning: failed to set the command line.\n");
+ free(new_buf);
+ return;
+ }
+ }
+
+ /*
+ * Add the 'initrd-start' and 'initrd-end' properties to the
+ * chosen node if an initrd is specified.
+ */
+ if (initrd_start != initrd_end) {
+ if ((fdt_setprop_cell(new_buf, chosen_offset,
+ "initrd-start", initrd_start) < 0) ||
+ (fdt_setprop_cell(new_buf, chosen_offset,
+ "initrd-end", initrd_end) < 0)) {
+ fprintf(stderr, "Warning: failed to set the initrd addresses.\n");
+ return;
+ }
+ }
+
+ free(*dtb_buf);
+ *dtb_buf = new_buf;
+ *buf_sz = new_buf_sz;
+ }
+}
+
int zImage_arm_load(int argc, char **argv, const char *buf, off_t len,
struct kexec_info *info)
{
@@ -222,6 +283,12 @@ int zImage_arm_load(int argc, char **argv, const char *buf, off_t len,
off_t ramdisk_length;
off_t ramdisk_offset;
int opt;
+ int use_atags;
+ char *dtb_buf;
+ off_t dtb_length;
+ char *dtb_file;
+ off_t dtb_offset;
+
/* See options.h -- add any more there, too. */
static const struct option options[] = {
KEXEC_ARCH_OPTIONS
@@ -229,6 +296,8 @@ int zImage_arm_load(int argc, char **argv, const char *buf, off_t len,
{ "append", 1, 0, OPT_APPEND },
{ "initrd", 1, 0, OPT_RAMDISK },
{ "ramdisk", 1, 0, OPT_RAMDISK },
+ { "dtb", 1, 0, OPT_DTB },
+ { "atags", 0, 0, OPT_ATAGS },
{ 0, 0, 0, 0 },
};
static const char short_options[] = KEXEC_ARCH_OPT_STR "a:r:";
@@ -241,6 +310,8 @@ int zImage_arm_load(int argc, char **argv, const char *buf, off_t len,
ramdisk = 0;
ramdisk_buf = 0;
ramdisk_length = 0;
+ use_atags = 0;
+ dtb_file = NULL;
while((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) {
switch(opt) {
default:
@@ -257,8 +328,21 @@ int zImage_arm_load(int argc, char **argv, const char *buf, off_t len,
case OPT_RAMDISK:
ramdisk = optarg;
break;
+ case OPT_DTB:
+ dtb_file = optarg;
+ break;
+ case OPT_ATAGS:
+ use_atags = 1;
+ break;
}
}
+
+ if (use_atags && dtb_file) {
+ fprintf(stderr, "You can only use ATAGs if you don't specify a "
+ "dtb file.\n");
+ return -1;
+ }
+
if (command_line) {
command_line_len = strlen(command_line) + 1;
if (command_line_len > COMMAND_LINE_SIZE)
@@ -315,12 +399,58 @@ int zImage_arm_load(int argc, char **argv, const char *buf, off_t len,
/* assume the maximum kernel compression ratio is 4,
* and just to be safe, place ramdisk after that
*/
- ramdisk_offset = base + len * 4;
+ ramdisk_offset = base + len * 4;
- if (atag_arm_load(info, base + atag_offset,
- command_line, command_line_len,
- ramdisk_buf, ramdisk_length, ramdisk_offset) == -1)
- return -1;
+ if (use_atags) {
+ /*
+ * use ATAGs from /proc/atags
+ */
+ if (atag_arm_load(info, base + atag_offset,
+ command_line, command_line_len,
+ ramdisk_buf, ramdisk_length, ramdisk_offset) == -1)
+ return -1;
+ } else {
+ /*
+ * Read a user-specified DTB file.
+ */
+ if (dtb_file) {
+ dtb_buf = slurp_file(dtb_file, &dtb_length);
+ } else {
+ /*
+ * Extract the DTB from /proc/device-tree.
+ */
+ struct boot_info *bi;
+ bi = dt_from_fs("/proc/device-tree");
+ dtb_buf = dt_to_blob_buf(&dtb_length, bi, DEFAULT_FDT_VERSION);
+ }
+
+ dtb_fixup_chosen_node(&dtb_buf, &dtb_length, command_line,
+ ramdisk_offset, ramdisk_offset + ramdisk_length);
+
+ if (fdt_check_header(dtb_buf) != 0) {
+ fprintf(stderr, "Invalid FDT buffer.\n");
+ return -1;
+ }
+
+ if (base + atag_offset + dtb_length > base + offset) {
+ fprintf(stderr, "DTB too large!\n");
+ return -1;
+ }
+
+ if (ramdisk) {
+ add_segment(info, ramdisk_buf, ramdisk_length,
+ ramdisk_offset, ramdisk_length);
+ }
+
+ /* Stick the dtb at the end of the initrd and page
+ * align it.
+ */
+ dtb_offset = ramdisk_offset + ramdisk_length + getpagesize();
+ dtb_offset &= ~(getpagesize() - 1);
+
+ add_segment(info, dtb_buf, dtb_length,
+ dtb_offset, dtb_length);
+ }
add_segment(info, buf, len, base + offset, len);
--
1.7.12
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^ permalink raw reply related [flat|nested] 15+ messages in thread