diff options
author | Daniel Mack <zonque@gmail.com> | 2012-12-13 14:35:34 +0100 |
---|---|---|
committer | Simon Horman <horms@verge.net.au> | 2012-12-14 22:32:41 +0900 |
commit | 20f722ebafd0b639080e2ca8acb9cfad4df407c4 (patch) | |
tree | 3fc493de786d555670a30ea6773c52d9761560b1 | |
parent | 5f15eaafe79f1ca44015821e8134d15554344cb0 (diff) | |
download | kexec-tools-20f722ebafd0b639080e2ca8acb9cfad4df407c4.tar.gz |
kexec-zImage-arm: add code to support --command-line along with --dtb
If --dtb is called together with --command-line, we need to modify the
binary dtb buffer. Luckily, we have libfdt functions available, so this
is straight forward.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Tested-by: Sven Neumann <s.neumann@raumfeld.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
-rw-r--r-- | kexec/arch/arm/kexec-zImage-arm.c | 48 |
1 files changed, 43 insertions, 5 deletions
diff --git a/kexec/arch/arm/kexec-zImage-arm.c b/kexec/arch/arm/kexec-zImage-arm.c index 46cedbf9..0950897a 100644 --- a/kexec/arch/arm/kexec-zImage-arm.c +++ b/kexec/arch/arm/kexec-zImage-arm.c @@ -359,6 +359,49 @@ int zImage_arm_load(int argc, char **argv, const char *buf, off_t len, */ if (dtb_file) { dtb_buf = slurp_file(dtb_file, &dtb_length); + + if (fdt_check_header(dtb_buf) != 0) { + fprintf(stderr, "Invalid FDT buffer.\n"); + return -1; + } + + if (command_line) { + const char *node_name = "/chosen"; + const char *prop_name = "bootargs"; + int off; + + /* check if a /choosen subnode already exists */ + off = fdt_path_offset(dtb_buf, node_name); + + if (off == -FDT_ERR_NOTFOUND) { + dtb_length = fdt_totalsize(dtb_buf) + + strlen(node_name) + 1 + + sizeof(struct fdt_node_header) + + FDT_TAGSIZE; + dtb_buf = xrealloc(dtb_buf, dtb_length); + fdt_set_totalsize(dtb_buf, dtb_length); + off = fdt_add_subnode(dtb_buf, off, node_name); + } + + if (off < 0) { + fprintf(stderr, "FDT: Error adding %s node.\n", node_name); + return -1; + } + + dtb_length = fdt_totalsize(dtb_buf) + + strlen(prop_name) + + strlen(command_line) + 1 + + sizeof(struct fdt_property); + dtb_buf = xrealloc(dtb_buf, dtb_length); + fdt_set_totalsize(dtb_buf, dtb_length); + + if (fdt_setprop(dtb_buf, off, prop_name, + command_line, strlen(command_line) + 1) != 0) { + fprintf(stderr, "FDT: Error setting %s/%s property.\n", + node_name, prop_name); + return -1; + } + } } else { /* * Extract the DTB from /proc/device-tree. @@ -366,11 +409,6 @@ int zImage_arm_load(int argc, char **argv, const char *buf, off_t len, create_flatten_tree(&dtb_buf, &dtb_length, command_line); } - 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; |