sandbox: add concept of sandbox state

The state exists through the life of U-Boot. It can be adjusted by command
line options and perhaps later through a config file.  It is available to
U-Boot through state_...() calls (within sandbox code).

The primary purpose of this is to contain the "hardware" state.  It should
only be used by sandbox internal code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

3 files changed, 60 insertions, 2 deletions

diff --git a/arch/sandbox/cpu/Makefile b/arch/sandbox/cpu/Makefile
index 2ae0f71..6fd09ff 100644
--- a/arch/sandbox/cpu/Makefile
+++ b/arch/sandbox/cpu/Makefile
@@ -27,7 +27,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(CPU).o
 
-COBJS	:= cpu.o start.o os.o
+COBJS	:= cpu.o os.o start.o state.o
 
 SRCS	:= $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))
diff --git a/arch/sandbox/cpu/start.c b/arch/sandbox/cpu/start.c
index a429e29..2b66eed 100644
--- a/arch/sandbox/cpu/start.c
+++ b/arch/sandbox/cpu/start.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011 The Chromium OS Authors.
+ * Copyright (c) 2011-2012 The Chromium OS Authors.
  * See file CREDITS for list of people who contributed to this
  * project.
  *
@@ -20,9 +20,16 @@
  */
 
 #include <common.h>
+#include <asm/state.h>
 
 int main(int argc, char *argv[])
 {
+	int err;
+
+	err = state_init();
+	if (err)
+		return err;
+
 	/*
 	 * Do pre- and post-relocation init, then start up U-Boot. This will
 	 * never return.
diff --git a/arch/sandbox/cpu/state.c b/arch/sandbox/cpu/state.c
new file mode 100644
index 0000000..88ae2b0
--- /dev/null
+++ b/arch/sandbox/cpu/state.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2011-2012 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/state.h>
+
+/* Main state record for the sandbox */
+static struct sandbox_state main_state;
+static struct sandbox_state *state;	/* Pointer to current state record */
+
+void state_record_exit(enum exit_type_id exit_type)
+{
+	state->exit_type = exit_type;
+}
+
+struct sandbox_state *state_get_current(void)
+{
+	assert(state);
+	return state;
+}
+
+int state_init(void)
+{
+	state = &main_state;
+
+	/*
+	 * Example of how to use GPIOs:
+	 *
+	 * sandbox_gpio_set_direction(170, 0);
+	 * sandbox_gpio_set_value(170, 0);
+	 */
+	return 0;
+}