SPL is expected to load and run U-Boot. This needs to work with sandbox also.
Provide a function to locate the U-Boot image, and another to start it. This
allows SPL to function on sandbox as it does on other archs.
Signed-off-by: Simon Glass <s...@chromium.org>
---
arch/sandbox/cpu/os.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
include/os.h | 25 +++++++++++++++++++++++++
2 files changed, 76 insertions(+)
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 8a4d719..2d63dd8 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -541,6 +541,57 @@ int os_jump_to_image(const void *dest, int size)
return unlink(fname);
}
+int os_find_u_boot(char *fname, int maxlen)
+{
+ struct sandbox_state *state = state_get_current();
+ const char *progname = state->argv[0];
+ int len = strlen(progname);
+ char *p;
+ int fd;
+
+ if (len >= maxlen || len < 4)
+ return -ENOSPC;
+
+ /* Look for 'u-boot' in the same directory as 'u-boot-spl' */
+ strcpy(fname, progname);
+ if (!strcmp(fname + len - 4, "-spl")) {
+ fname[len - 4] = '\0';
+ fd = os_open(fname, O_RDONLY);
+ if (fd >= 0) {
+ close(fd);
+ return 0;
+ }
+ }
+
+ /* Look for 'u-boot' in the parent directory of spl/ */
+ p = strstr(fname, "/spl/");
+ if (p) {
+ strcpy(p, p + 4);
+ fd = os_open(fname, O_RDONLY);
+ if (fd >= 0) {
+ close(fd);
+ return 0;
+ }
+ }
+
+ return -ENOENT;
+}
+
+int os_spl_to_uboot(const char *fname)
+{
+ struct sandbox_state *state = state_get_current();
+ char *argv[state->argc + 1];
+ int ret;
+
+ memcpy(argv, state->argv, sizeof(char *) * (state->argc + 1));
+ argv[0] = (char *)fname;
+ ret = execv(fname, argv);
+ if (ret)
+ return ret;
+
+ return unlink(fname);
+}
+
void os_localtime(struct rtc_time *rt)
{
time_t t = time(NULL);
diff --git a/include/os.h b/include/os.h
index 954a48c..1782e50 100644
--- a/include/os.h
+++ b/include/os.h
@@ -287,6 +287,31 @@ int os_read_ram_buf(const char *fname);
int os_jump_to_image(const void *dest, int size);
/**
+ * os_find_u_boot() - Determine the path to U-Boot proper
+ *
+ * This function is intended to be called from within sandbox SPL. It uses
+ * a few heuristics to find U-Boot proper. Normally it is either in the same
+ * directory, or the directory above (since u-boot-spl is normally in an
+ * spl/ subdirectory when built).
+ *
+ * @fname: Place to put full path to U-Boot
+ * @maxlen: Maximum size of @fname
+ * @return 0 if OK, -NOSPC if the filename is too large, -ENOENT if not found
+ */
+int os_find_u_boot(char *fname, int maxlen);
+
+/**
+ * os_spl_to_uboot() - Run U-Boot proper
+ *
+ * When called from SPL, this runs U-Boot proper. The filename is obtained by
+ * calling os_find_u_boot().
+ *
+ * @fname: Full pathname to U-Boot executable
+ * @return 0 if OK, -ve on error
+ */
+int os_spl_to_uboot(const char *fname);
+
+/**
* Read the current system time
*
* This reads the current Local Time and places it into the provided
--
2.8.0.rc3.226.g39d4020
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