sandbox: Support executables for more phases

The SPL header has a function for obtaining the phase in capital letters,
e.g. 'SPL'. Add one for lower-case also, as used by sandbox.

Use this to generalise the sandbox logic for determining the filename of
the next sandbox executable. This can provide support for VPL.

Signed-off-by: Simon Glass <sjg@chromium.org>

2 files changed, 25 insertions, 1 deletions

diff --git a/include/os.h b/include/os.h
index bd1096e..7b20d60 100644
--- a/include/os.h
+++ b/include/os.h
@@ -327,9 +327,12 @@ int os_jump_to_image(const void *dest, int size);
  * @fname:	place to put full path to U-Boot
  * @maxlen:	maximum size of @fname
  * @use_img:	select the 'u-boot.img' file instead of the 'u-boot' ELF file
+ * @cur_prefix:	prefix of current executable, e.g. "spl" or "tpl"
+ * @next_prefix: prefix of executable to find, e.g. "spl" or ""
  * Return:	0 if OK, -NOSPC if the filename is too large, -ENOENT if not found
  */
-int os_find_u_boot(char *fname, int maxlen, bool use_img);
+int os_find_u_boot(char *fname, int maxlen, bool use_img,
+		   const char *cur_prefix, const char *next_prefix);
 
 /**
  * os_spl_to_uboot() - Run U-Boot proper
diff --git a/include/spl.h b/include/spl.h
index c643943..d88fb79 100644
--- a/include/spl.h
+++ b/include/spl.h
@@ -176,6 +176,27 @@ static inline const char *spl_phase_name(enum u_boot_phase phase)
 	}
 }
 
+/**
+ * spl_phase_prefix() - Get the prefix  of the current phase
+ *
+ * @phase: Phase to look up
+ * @return phase prefix ("spl", "tpl", etc.)
+ */
+static inline const char *spl_phase_prefix(enum u_boot_phase phase)
+{
+	switch (phase) {
+	case PHASE_TPL:
+		return "tpl";
+	case PHASE_SPL:
+		return "spl";
+	case PHASE_BOARD_F:
+	case PHASE_BOARD_R:
+		return "";
+	default:
+		return "phase?";
+	}
+}
+
 /* A string name for SPL or TPL */
 #ifdef CONFIG_SPL_BUILD
 # ifdef CONFIG_TPL_BUILD