Add a flattened device tree (fdt) command (2 of 2)
Modifications to the existing code to support the new fdt command.
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index c0ed076..ab8648f 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -34,7 +34,11 @@
#include <environment.h>
#include <asm/byteorder.h>
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_LIBFDT)
+#include <fdt.h>
+#include <libfdt.h>
+#endif
+#if defined(CONFIG_OF_FLAT_TREE)
#include <ft_build.h>
#endif
@@ -467,7 +471,7 @@
"[addr [arg ...]]\n - boot application image stored in memory\n"
"\tpassing arguments 'arg ...'; when booting a Linux kernel,\n"
"\t'arg' can be the address of an initrd image\n"
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
"\tWhen booting a Linux kernel which requires a flat device-tree\n"
"\ta third argument is required which is the address of the of the\n"
"\tdevice-tree blob. To boot that kernel without an initrd image,\n"
@@ -529,7 +533,7 @@
bd_t *kbd;
void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
image_header_t *hdr = &header;
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
char *of_flat_tree = NULL;
ulong of_data = 0;
#endif
@@ -622,7 +626,7 @@
* Check if there is an initrd image
*/
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
/* Look for a '-' which indicates to ignore the ramdisk argument */
if (argc >= 3 && strcmp(argv[2], "-") == 0) {
debug ("Skipping initrd\n");
@@ -739,12 +743,15 @@
len = data = 0;
}
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
if(argc > 3) {
of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16);
hdr = (image_header_t *)of_flat_tree;
-
- if (*(ulong *)of_flat_tree == OF_DT_HEADER) {
+#if defined(CONFIG_OF_LIBFDT)
+ if (be32_to_cpu(fdt_magic(of_flat_tree)) == FDT_MAGIC) {
+#else
+ if (*(ulong *)of_flat_tree == OF_DT_HEADER) {
+#endif
#ifndef CFG_NO_FLASH
if (addr2info((ulong)of_flat_tree) != NULL)
of_data = (ulong)of_flat_tree;
@@ -787,7 +794,11 @@
printf("ERROR: uImage is not uncompressed\n");
return;
}
+#if defined(CONFIG_OF_LIBFDT)
+ if (be32_to_cpu(fdt_magic(of_flat_tree + sizeof(image_header_t))) != FDT_MAGIC) {
+#else
if (*((ulong *)(of_flat_tree + sizeof(image_header_t))) != OF_DT_HEADER) {
+#endif
printf ("ERROR: uImage data is not a flat device tree\n");
return;
}
@@ -824,12 +835,20 @@
of_data += 4 - tail;
}
+#if defined(CONFIG_OF_LIBFDT)
+ if (be32_to_cpu(fdt_magic(of_data)) != FDT_MAGIC) {
+#else
if (((struct boot_param_header *)of_data)->magic != OF_DT_HEADER) {
+#endif
printf ("ERROR: image is not a flat device tree\n");
return;
}
+#if defined(CONFIG_OF_LIBFDT)
+ if (be32_to_cpu(fdt_totalsize(of_data)) != ntohl(len_ptr[2])) {
+#else
if (((struct boot_param_header *)of_data)->totalsize != ntohl(len_ptr[2])) {
+#endif
printf ("ERROR: flat device tree size does not agree with image\n");
return;
}
@@ -913,7 +932,31 @@
unlock_ram_in_cache();
#endif
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_LIBFDT)
+ /* move of_flat_tree if needed */
+ if (of_data) {
+ int err;
+ ulong of_start, of_len;
+ of_len = be32_to_cpu(fdt_totalsize(of_data));
+ /* provide extra 8k pad */
+ if (initrd_start)
+ of_start = initrd_start - of_len - 8192;
+ else
+ of_start = (ulong)kbd - of_len - 8192;
+ of_start &= ~(4096 - 1); /* align on page */
+ debug ("## device tree at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
+ of_data, of_data + of_len - 1, of_len, of_len);
+
+
+ printf (" Loading Device Tree to %08lx, end %08lx ... ",
+ of_start, of_start + of_len - 1);
+ err = fdt_open_into(of_start, of_data, of_len);
+ if (err != 0) {
+ printf ("libfdt: %s\n", fdt_strerror(err));
+ }
+ }
+#endif
+#if defined(CONFIG_OF_FLAT_TREE)
/* move of_flat_tree if needed */
if (of_data) {
ulong of_start, of_len;
@@ -942,13 +985,13 @@
* r6: Start of command line string
* r7: End of command line string
*/
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
if (!of_flat_tree) /* no device tree; boot old style */
#endif
(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
/* does not return */
-#ifdef CONFIG_OF_FLAT_TREE
+#if defined(CONFIG_OF_FLAT_TREE) || defined(CONFIG_OF_LIBFDT)
/*
* Linux Kernel Parameters (passing device tree):
* r3: ptr to OF flat tree, followed by the board info data
@@ -957,8 +1000,10 @@
* r6: NULL
* r7: NULL
*/
+#if defined(CONFIG_OF_FLAT_TREE)
ft_setup(of_flat_tree, kbd, initrd_start, initrd_end);
/* ft_dump_blob(of_flat_tree); */
+#endif
(*kernel) ((bd_t *)of_flat_tree, (ulong)kernel, 0, 0, 0);
#endif