1 /* 2 * Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef CSS_SCP_H 8 #define CSS_SCP_H 9 10 #include <stdint.h> 11 12 #include <platform_def.h> 13 14 #include <lib/cassert.h> 15 16 /* Forward declarations */ 17 struct psci_power_state; 18 19 /* API for power management by SCP */ 20 int css_system_reset2(int is_vendor, int reset_type, u_register_t cookie); 21 void css_scp_suspend(const struct psci_power_state *target_state); 22 void css_scp_off(const struct psci_power_state *target_state); 23 void css_scp_on(u_register_t mpidr); 24 int css_scp_get_power_state(u_register_t mpidr, unsigned int power_level); 25 void __dead2 css_scp_sys_shutdown(void); 26 void __dead2 css_scp_sys_reboot(void); 27 void __dead2 css_scp_system_off(int state); 28 29 /* API for SCP Boot Image transfer. Return 0 on success, -1 on error */ 30 int css_scp_boot_image_xfer(void *image, unsigned int image_size); 31 32 /* 33 * API to wait for SCP to signal till it's ready after booting the transferred 34 * image. 35 */ 36 int css_scp_boot_ready(void); 37 38 #if CSS_LOAD_SCP_IMAGES 39 40 /* 41 * All CSS platforms load SCP_BL2/SCP_BL2U just below BL2 (this is where BL31 42 * usually resides except when ARM_BL31_IN_DRAM is 43 * set). Ensure that SCP_BL2/SCP_BL2U do not overflow into fw_config. 44 */ 45 CASSERT(SCP_BL2_LIMIT <= BL2_BASE, assert_scp_bl2_overwrite_bl2); 46 CASSERT(SCP_BL2U_LIMIT <= BL2_BASE, assert_scp_bl2u_overwrite_bl2); 47 48 CASSERT(SCP_BL2_BASE >= ARM_FW_CONFIG_LIMIT, assert_scp_bl2_overflow); 49 CASSERT(SCP_BL2U_BASE >= ARM_FW_CONFIG_LIMIT, assert_scp_bl2u_overflow); 50 #endif 51 52 #endif /* CSS_SCP_H */ 53