diff options
| author | Simon Glass <sjg@chromium.org> | 2011-08-22 08:06:19 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2011-09-13 15:53:29 -0700 |
| commit | 1ca0c7d8356936a85c91db14672aea95f3c822ef (patch) | |
| tree | 6743abc2334637deb4ca83cb1ce39ff3a80547ed /common | |
| parent | 391839609251aa6121399fd864c126b39d88319e (diff) | |
fdt: Add function to locate or allocate region
This function looks up a property in a node which contains a memory region
address and size. It returns a pointer to this address, but if the address
is zero, it is allocated with malloc() instead.
It is used to allocate Chrome OS GBB memory regions and the like.
BUG=chromium-os:19353
TEST=build for Seaboard
Change-Id: I91fe8656f3ea50839998ab0e16b023635adbc119
Reviewed-on: http://gerrit.chromium.org/gerrit/7640
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Tested-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common')
| -rw-r--r-- | common/fdt_decode.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/common/fdt_decode.c b/common/fdt_decode.c index 4e889db0eb..adad546fb0 100644 --- a/common/fdt_decode.c +++ b/common/fdt_decode.c @@ -20,9 +20,11 @@ */ #include <common.h> -#include <serial.h> -#include <libfdt.h> + #include <fdt_decode.h> +#include <libfdt.h> +#include <malloc.h> +#include <serial.h> /* we need a generic GPIO interface here */ #include <asm/arch/gpio.h> @@ -676,3 +678,23 @@ int fdt_decode_nand(const void *blob, int node, struct fdt_nand *config) config->width = get_int(blob, node, "width", 8); return fdt_decode_gpio(blob, node, "wp-gpio", &config->wp_gpio); } + +void *fdt_decode_alloc_region(const void *blob, int node, + const char *prop_name, size_t *size) +{ + const addr_t *cell; + void *ptr; + int len; + + debug("fdt_decode_alloc: %s\n", prop_name); + cell = fdt_getprop(blob, node, prop_name, &len); + if (!cell || (len != sizeof(addr_t) * 2)) + return NULL; + + ptr = (void *)addr_to_cpu(*cell); + *size = size_to_cpu(cell[1]); + debug("fdt_decode_alloc: size=%zx\n", *size); + if (!ptr) + ptr = malloc(*size); + return ptr; +} |