1 files changed, 59 insertions, 0 deletions
diff --git a/chip_interface/ec_system.h b/chip_interface/ec_system.h
new file mode 100644
index 0000000000..da3874d8c1
--- /dev/null
+++ b/chip_interface/ec_system.h
@@ -0,0 +1,59 @@
+/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* System module for Chrome EC */
+
+#ifndef __CROS_EC_SYSTEM_H
+#define __CROS_EC_SYSTEM_H
+
+#include "ec_common.h"
+
+/* Reset causes */
+typedef enum EcSystemResetCause {
+  /* Unknown reset cause */
+  EC_SYSTEM_RESET_UNKNOWN = 0,
+  /* System reset cause is known, but not one of the causes listed below */
+  EC_SYSTEM_RESET_OTHER,
+  /* Brownout */
+  EC_SYSTEM_RESET_BROWNOUT,
+  /* Power-on reset */
+  EC_SYSTEM_RESET_POWER_ON,
+  /* Reset caused by asserting reset (RST#) pin */
+  EC_SYSTEM_RESET_RESET_PIN,
+  /* Software requested cold reset */
+  EC_SYSTEM_RESET_SOFT_COLD,
+  /* Software requested warm reset */
+  EC_SYSTEM_RESET_SOFT_WARM,
+  /* Watchdog timer reset */
+  EC_SYSTEM_RESET_WATCHDOG,
+} EcSystemResetCause;
+
+
+/* Initializes the system module. */
+EcError EcSystemInit(void);
+
+/* Returns the cause of the last reset, or EC_SYSTEM_RESET_UNKNOWN if
+ * the cause is not known. */
+EcSystemResetCause EcSystemGetResetCause(void);
+
+/* Resets the system.  If is_cold!=0, performs a cold reset (which
+ * resets on-chip peripherals); else performs a warm reset (which does
+ * not reset on-chip peripherals).  If successful, does not return.
+ * Returns error if the reboot type cannot be requested (e.g. brownout
+ * or reset pin). */
+EcError EcSystemReset(int is_cold);
+
+/* Sets a scratchpad register to the specified value.  The scratchpad
+ * register must maintain its contents across a software-requested
+ * warm reset. */
+EcError EcSystemSetScratchpad(uint32_t value);
+
+/* Stores the current scratchpad register value into <value_ptr>. */
+EcError EcSystemGetScratchpad(uint32_t* value_ptr);
+
+/* TODO: request sleep.  How do we want to handle transitioning
+ * to/from low-power states? */
+
+#endif  /* __CROS_EC_SYSTEM_H */