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author | Vicente Bergas <vicencb@gmail.com> | 2013-02-12 00:04:59 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-02-12 09:04:27 +0100 |
commit | afab6ac78303dd86bd7de62f17b32daf444f8d1a (patch) | |
tree | 51cc3b179034506f8d56cafc0a3ac97e7ced831c /common/oftree.c | |
parent | c0ba0a64ae16bc9f722187acb0769bb48d674c5d (diff) | |
download | barebox-afab6ac78303dd86bd7de62f17b32daf444f8d1a.tar.gz barebox-afab6ac78303dd86bd7de62f17b32daf444f8d1a.tar.xz |
DeviceTree: add support for initrd in the DT
Add the initrd start and end address to the DT, code comes from u-boot.
Signed-off-by: Vicente Bergas <vicencb@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'common/oftree.c')
-rw-r--r-- | common/oftree.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/common/oftree.c b/common/oftree.c index 0df5209bda..6b20cdbd8a 100644 --- a/common/oftree.c +++ b/common/oftree.c @@ -246,6 +246,72 @@ int fdt_get_path_or_create(struct fdt_header *fdt, const char *path) return nodeoffset; } +int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force) +{ + int nodeoffset; + int err, j, total; + u32 tmp; + const char *path; + uint64_t addr, size; + + /* Find the "chosen" node */ + nodeoffset = fdt_path_offset(fdt, "/chosen"); + + /* If there is no "chosen" node in the blob return */ + if (nodeoffset < 0) { + printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset)); + return nodeoffset; + } + + /* just return if initrd_start/end aren't valid */ + if ((initrd_start == 0) || (initrd_end == 0)) + return 0; + + total = fdt_num_mem_rsv(fdt); + + /* + * Look for an existing entry and update it. If we don't find + * the entry, we will j be the next available slot. + */ + for (j = 0; j < total; j++) { + err = fdt_get_mem_rsv(fdt, j, &addr, &size); + if (addr == initrd_start) { + fdt_del_mem_rsv(fdt, j); + break; + } + } + + err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); + if (err < 0) { + printf("fdt_initrd: %s\n", fdt_strerror(err)); + return err; + } + + path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL); + if (!path || force) { + tmp = __cpu_to_be32(initrd_start); + err = fdt_setprop(fdt, nodeoffset, + "linux,initrd-start", &tmp, sizeof(tmp)); + if (err < 0) { + printf("WARNING: " + "could not set linux,initrd-start %s.\n", + fdt_strerror(err)); + return err; + } + tmp = __cpu_to_be32(initrd_end); + err = fdt_setprop(fdt, nodeoffset, + "linux,initrd-end", &tmp, sizeof(tmp)); + if (err < 0) { + printf("WARNING: could not set linux,initrd-end %s.\n", + fdt_strerror(err)); + + return err; + } + } + + return 0; +} + static int of_fixup_bootargs(struct fdt_header *fdt) { int nodeoffset; |