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sandbox: Use os functions to read host device tree

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At present we use U-Boot's filesystem layer to read the sandbox device tree,
but this is problematic since it relies on a temporary feauture added
there. Since we plan to implement proper block layer support for sandbox,
change this code to use the os layer functions instead. Also use the new
fdt_create_empty_tree() instead of our own code.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2014-02-27 13:25:58 -07:00
parent 9f6044256e
commit 95fac6ab45
2 changed files with 21 additions and 44 deletions
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48
common/board_f.c
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@@ -282,45 +282,39 @@ __weak int arch_cpu_init(void)
#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();
const char *fname = state->fdt_fname;
void *blob;
int size;
ssize_t size;
int err;
int fd;
blob = map_sysmem(CONFIG_SYS_FDT_LOAD_ADDR, 0);
if (!state->fdt_fname) {
err = make_empty_fdt(blob);
err = fdt_create_empty_tree(blob, 256);
if (!err)
goto done;
return err;
printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
return -EINVAL;
}
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)
size = os_get_filesize(fname);
if (size < 0) {
printf("Failed to file FDT file '%s'\n", fname);
return -ENOENT;
}
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;