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Diffstat (limited to 'common/board_f.c')
-rw-r--r--common/board_f.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/common/board_f.c b/common/board_f.c
index 2045055..3a6638f 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -31,6 +31,7 @@
#include <version.h>
#include <environment.h>
#include <fdtdec.h>
+#include <fs.h>
#if defined(CONFIG_CMD_IDE)
#include <ide.h>
#endif
@@ -305,6 +306,55 @@ __weak int arch_cpu_init(void)
return 0;
}
+#ifdef CONFIG_OF_HOSTFILE
+
+#define CHECK(x) err = (x); if (err) goto failed;
+
+/* Create an empty device tree blob */
+static int make_empty_fdt(void *fdt)
+{
+ int err;
+
+ CHECK(fdt_create(fdt, 256));
+ CHECK(fdt_finish_reservemap(fdt));
+ CHECK(fdt_begin_node(fdt, ""));
+ CHECK(fdt_end_node(fdt));
+ CHECK(fdt_finish(fdt));
+
+ return 0;
+failed:
+ printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
+ return -EACCES;
+}
+
+static int read_fdt_from_file(void)
+{
+ struct sandbox_state *state = state_get_current();
+ void *blob;
+ int size;
+ int err;
+
+ blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0);
+ if (!state->fdt_fname) {
+ err = make_empty_fdt(blob);
+ if (!err)
+ goto done;
+ return err;
+ }
+ err = fs_set_blk_dev("host", NULL, FS_TYPE_SANDBOX);
+ if (err)
+ return err;
+ size = fs_read(state->fdt_fname, CONFIG_SYS_FDT_LOAD_ADDR, 0, 0);
+ if (size < 0)
+ return -EIO;
+
+done:
+ gd->fdt_blob = blob;
+
+ return 0;
+}
+#endif
+
#ifdef CONFIG_SANDBOX
static int setup_ram_buf(void)
{
@@ -328,6 +378,11 @@ static int setup_fdt(void)
# else
gd->fdt_blob = (ulong *)&_end;
# endif
+#elif defined(CONFIG_OF_HOSTFILE)
+ if (read_fdt_from_file()) {
+ puts("Failed to read control FDT\n");
+ return -1;
+ }
#endif
/* Allow the early environment to override the fdt address */
gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,