Add the initrd start and end address to the DT, code comes from u-boot.
Signed-off-by: Vicente Bergas <vicencb@xxxxxxxxx>
---
arch/arm/lib/armlinux.c | 2 ++
common/oftree.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++
include/of.h | 1 +
3 files changed, 69 insertions(+)
diff --git a/arch/arm/lib/armlinux.c b/arch/arm/lib/armlinux.c
index 40a63ea..8052ca4 100644
--- a/arch/arm/lib/armlinux.c
+++ b/arch/arm/lib/armlinux.c
@@ -266,6 +266,8 @@ void start_linux(void *adr, int swap, unsigned long initrd_address,
if (oftree) {
printf("booting Linux kernel with devicetree\n");
+ fdt_initrd(oftree, initrd_address,
+ initrd_address+initrd_size, 1);
params = oftree;
} else {
setup_tags(initrd_address, initrd_size, swap);
diff --git a/common/oftree.c b/common/oftree.c
index 0df5209..7c118d2 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;
diff --git a/include/of.h b/include/of.h
index d3a310f..dcb4c4b 100644
--- a/include/of.h
+++ b/include/of.h
@@ -18,6 +18,7 @@ void do_fixup_by_path(struct fdt_header *fdt, const char *path, const char *prop
void do_fixup_by_path_u32(struct fdt_header *fdt, const char *path, const char *prop,
u32 val, int create);
int fdt_get_path_or_create(struct fdt_header *fdt, const char *path);
+int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force);
#define OF_BAD_ADDR ((u64)-1)
--
1.8.1.3
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