sandbox: Support multiple reset types

Add settings for the last reset generated, and the types of resets which
are permitted. This will be used for testing.

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

arch/sandbox/cpu/state.c

@@ -345,6 +345,10 @@ int state_init(void)
 	state->ram_buf = os_malloc(state->ram_size);
 	assert(state->ram_buf);
 
+	/* No reset yet, so mark it as such. Always allow power reset */
+	state->last_reset = RESET_COUNT;
+	state->reset_allowed[RESET_POWER] = true;
+
 	/*
 	 * Example of how to use GPIOs:
 	 *

arch/sandbox/include/asm/state.h

@@ -7,6 +7,7 @@
 #define __SANDBOX_STATE_H
 
 #include <config.h>
+#include <reset.h>
 #include <stdbool.h>
 #include <linux/stringify.h>
 
@@ -59,6 +60,8 @@ struct sandbox_state {
 	bool write_state;		/* Write sandbox state on exit */
 	bool ignore_missing_state_on_read;	/* No error if state missing */
 	bool show_lcd;			/* Show LCD on start-up */
+	enum reset_t last_reset;	/* Last reset type */
+	bool reset_allowed[RESET_COUNT];	/* Allowed reset types */
 	enum state_terminal_raw term_raw;	/* Terminal raw/cooked */
 
 	/* Pointer to information for each SPI bus/cs */