[U-Boot] [PATCH v2 17/23] sandbox: Add a new 'sb' command

[Simon Glass]

The old 'sb' command was deprecated in 2015 and replaced with 'host'. It
is useful to be able to access some internal sandbox state, particularly
for testing.

Resurrect the old command and provide a way to print some basic state
information (currently just the arguments to sandbox).

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

Changes in v2: None

 arch/sandbox/cpu/start.c         | 10 +++++++
 arch/sandbox/include/asm/state.h |  7 +++++
 cmd/Makefile                     |  1 +
 cmd/sb.c                         | 46 ++++++++++++++++++++++++++++++++
 4 files changed, 64 insertions(+)
 create mode 100644 cmd/sb.c

diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c
index 2879b438d25..2251ec4c53f 100644
--- a/arch/sandbox/cpu/start.c
+++ b/arch/sandbox/cpu/start.c
@@ -295,6 +295,16 @@ static void setup_ram_buf(struct sandbox_state *state)
 	gd->ram_size = state->ram_size;
 }
 
+void state_show(struct sandbox_state *state)
+{
+	char **p;
+
+	printf("Arguments:\n");
+	for (p = state->argv; *p; p++)
+		printf("%s ", *p);
+	printf("\n");
+}
+
 int main(int argc, char *argv[])
 {
 	struct sandbox_state *state;
diff --git a/arch/sandbox/include/asm/state.h b/arch/sandbox/include/asm/state.h
index 6506ec9ba31..4e4c71b8062 100644
--- a/arch/sandbox/include/asm/state.h
+++ b/arch/sandbox/include/asm/state.h
@@ -242,6 +242,13 @@ bool state_get_skip_delays(void);
  */
 void state_reset_for_test(struct sandbox_state *state);
 
+/**
+ * state_show() - Show information about the sandbox state
+ *
+ * @param state		Sandbox state to show
+ */
+void state_show(struct sandbox_state *state);
+
 /**
  * Initialize the test system state
  */
diff --git a/cmd/Makefile b/cmd/Makefile
index 2c858f9500a..33604716c4b 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -114,6 +114,7 @@ obj-$(CONFIG_CMD_ROCKUSB) += rockusb.o
 obj-$(CONFIG_SANDBOX) += host.o
 obj-$(CONFIG_CMD_SATA) += sata.o
 obj-$(CONFIG_CMD_NVME) += nvme.o
+obj-$(CONFIG_SANDBOX) += sb.o
 obj-$(CONFIG_CMD_SF) += sf.o
 obj-$(CONFIG_CMD_SCSI) += scsi.o disk.o
 obj-$(CONFIG_CMD_SHA1SUM) += sha1sum.o
diff --git a/cmd/sb.c b/cmd/sb.c
new file mode 100644
index 00000000000..6ca3361d7e3
--- /dev/null
+++ b/cmd/sb.c
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018, Google Inc.
+ * Written by Simon Glass <sjg at chromium.org>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <spl.h>
+#include <asm/state.h>
+
+static int do_sb_state(cmd_tbl_t *cmdtp, int flag, int argc,
+		       char * const argv[])
+{
+	struct sandbox_state *state;
+
+	state = state_get_current();
+	state_show(state);
+
+	return 0;
+}
+
+static cmd_tbl_t cmd_sb_sub[] = {
+	U_BOOT_CMD_MKENT(state, 1, 0, do_sb_state, "", ""),
+};
+
+static int do_sb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	cmd_tbl_t *c;
+
+	/* Skip past 'sb' */
+	argc--;
+	argv++;
+
+	c = find_cmd_tbl(argv[0], cmd_sb_sub, ARRAY_SIZE(cmd_sb_sub));
+	if (c)
+		return c->cmd(cmdtp, flag, argc, argv);
+	else
+		return CMD_RET_USAGE;
+}
+
+U_BOOT_CMD(
+	sb,	8,	1,	do_sb,
+	"Sandbox status commands",
+	"state       - Show sandbox state"
+);
-- 
2.19.0.605.g01d371f741-goog