CSS: Reorganize the SCP Image transfer functionality
The SCP_BL2 is transferred to SCP during BL2 image load and authenticate
sequence. The Boot-Over-MHU (BOM) protocol is used as transport for this. After
the SCP boots using the transferred image, the AP CPU waits till the `READY`
message is received from SCP. This patch separates the API for transport of
image from the wait for `READY` message and also moves the related files to
the `css/drivers` folder. The previous API `scp_bootloader_transfer` is
renamed to `css_scp_boot_image_xfer` to reflect the css naming convention.
This reorganisation also allows easier switch to a different transport
(eg: Shared Data Structure based transfer) in future
Change-Id: I8a96f9c4616ffde6dbfdf7c18f6f6f8bfa40bbf0
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
diff --git a/plat/arm/css/drivers/scp/css_scp.h b/plat/arm/css/drivers/scp/css_scp.h
index 165226d..097a9f5 100644
--- a/plat/arm/css/drivers/scp/css_scp.h
+++ b/plat/arm/css/drivers/scp/css_scp.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -7,13 +7,31 @@
#ifndef __CSS_SCP_H__
#define __CSS_SCP_H__
-#include <psci.h>
+#include <types.h>
+#include "../scpi/css_scpi.h"
-void css_scp_suspend(const psci_power_state_t *target_state);
-void css_scp_off(const psci_power_state_t *target_state);
+/* Forward declarations */
+struct psci_power_state;
+
+/* API for power management by SCP */
+void css_scp_suspend(const struct psci_power_state *target_state);
+void css_scp_off(const struct psci_power_state *target_state);
void css_scp_on(u_register_t mpidr);
int css_scp_get_power_state(u_register_t mpidr, unsigned int power_level);
void __dead2 css_scp_sys_shutdown(void);
void __dead2 css_scp_sys_reboot(void);
+/* API for SCP Boot Image transfer. Return 0 on success, -1 on error */
+int css_scp_boot_image_xfer(void *image, unsigned int image_size);
+
+/*
+ * API to wait for SCP to signal till it's ready after booting the transferred
+ * image.
+ */
+static inline int css_scp_boot_ready(void)
+{
+ VERBOSE("Waiting for SCP to signal it is ready to go on\n");
+ return scpi_wait_ready();
+}
+
#endif /* __CSS_SCP_H__ */