diff options
| -rw-r--r-- | common/fdt_support.c | 35 | ||||
| -rw-r--r-- | include/fdt_support.h | 1 |
2 files changed, 36 insertions, 0 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c index 68343990395..02cf5c6241b 100644 --- a/common/fdt_support.c +++ b/common/fdt_support.c @@ -467,6 +467,41 @@ int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) } return 0; } + +int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int areas) +{ + int err, nodeoffset; + int len; + u8 tmp[8 * 16]; /* Up to 64-bit address + 64-bit size */ + + if (areas > 8) { + printf("%s: num areas %d exceeds hardcoded limit %d\n", + __func__, areas, 8); + return -1; + } + + err = fdt_check_header(blob); + if (err < 0) { + printf("%s: %s\n", __func__, fdt_strerror(err)); + return err; + } + + /* find or create "/memory" node. */ + nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); + if (nodeoffset < 0) + return nodeoffset; + + len = fdt_pack_reg(blob, tmp, start, size, areas); + + err = fdt_setprop(blob, nodeoffset, "linux,usable-memory", tmp, len); + if (err < 0) { + printf("WARNING: could not set %s %s.\n", + "reg", fdt_strerror(err)); + return err; + } + + return 0; +} #endif int fdt_fixup_memory(void *blob, u64 start, u64 size) diff --git a/include/fdt_support.h b/include/fdt_support.h index cefb2b2cce2..2286ea77939 100644 --- a/include/fdt_support.h +++ b/include/fdt_support.h @@ -94,6 +94,7 @@ int fdt_fixup_memory(void *blob, u64 start, u64 size); */ #ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks); +int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int banks); #else static inline int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) |