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Diffstat (limited to 'arch/sandbox/cpu/cpu.c')
-rw-r--r--arch/sandbox/cpu/cpu.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c
index f0dafedc25..168f2efa33 100644
--- a/arch/sandbox/cpu/cpu.c
+++ b/arch/sandbox/cpu/cpu.c
@@ -6,6 +6,7 @@
#include <common.h>
#include <dm/root.h>
#include <os.h>
+#include <asm/io.h>
#include <asm/state.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -97,3 +98,43 @@ phys_addr_t map_to_sysmem(const void *ptr)
void flush_dcache_range(unsigned long start, unsigned long stop)
{
}
+
+int sandbox_read_fdt_from_file(void)
+{
+ struct sandbox_state *state = state_get_current();
+ const char *fname = state->fdt_fname;
+ void *blob;
+ loff_t size;
+ int err;
+ int fd;
+
+ blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0);
+ if (!state->fdt_fname) {
+ err = fdt_create_empty_tree(blob, 256);
+ if (!err)
+ goto done;
+ printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
+ return -EINVAL;
+ }
+
+ err = os_get_filesize(fname, &size);
+ if (err < 0) {
+ printf("Failed to file FDT file '%s'\n", fname);
+ return err;
+ }
+ fd = os_open(fname, OS_O_RDONLY);
+ if (fd < 0) {
+ printf("Failed to open FDT file '%s'\n", fname);
+ return -EACCES;
+ }
+ if (os_read(fd, blob, size) != size) {
+ os_close(fd);
+ return -EIO;
+ }
+ os_close(fd);
+
+done:
+ gd->fdt_blob = blob;
+
+ return 0;
+}