text: /*
   * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
   *
   * SPDX-License-Identifier: BSD-3-Clause
   */
  
  /* Top level SMC handler for SiP calls. Dispatch PM calls to PM SMC handler. */
  
  #include <runtime_svc.h>
  #include <uuid.h>
  #include "ipi_mailbox_svc.h"
  #include "pm_svc_main.h"
  
  /* SMC function IDs for SiP Service queries */
  #define ZYNQMP_SIP_SVC_CALL_COUNT	0x8200ff00
  #define ZYNQMP_SIP_SVC_UID		0x8200ff01
  #define ZYNQMP_SIP_SVC_VERSION		0x8200ff03
  
  /* SiP Service Calls version numbers */
  #define SIP_SVC_VERSION_MAJOR	0
  #define SIP_SVC_VERSION_MINOR	1
  
  /* These macros are used to identify PM, IPI calls from the SMC function ID */
  #define PM_FID_MASK	0xf000u
  #define PM_FID_VALUE	0u
  #define IPI_FID_VALUE	0x1000u
  #define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE)
  #define is_ipi_fid(_fid) (((_fid) & PM_FID_MASK) == IPI_FID_VALUE)
  
  /* SiP Service UUID */
  DEFINE_SVC_UUID2(zynqmp_sip_uuid,
  	0x5c9b1b2a, 0x0586, 0x2340, 0xa6, 0x1b,
  	0xb9, 0x25, 0x82, 0x2d, 0xe3, 0xa5);
  
  /**
   * sip_svc_setup() - Setup SiP Service
   *
   * Invokes PM setup
   */
  static int32_t sip_svc_setup(void)
  {
  	int32_t ret;
  
  	/* PM implementation as SiP Service */
  	ret = pm_setup();
  
  	return ret;
  }
  
  /**
   * sip_svc_smc_handler() - Top-level SiP Service SMC handler
   *
   * Handler for all SiP SMC calls. Handles standard SIP requests
   * and calls PM SMC handler if the call is for a PM-API function.
   */
  uintptr_t sip_svc_smc_handler(uint32_t smc_fid,
  			      u_register_t x1,
  			      u_register_t x2,
  			      u_register_t x3,
  			      u_register_t x4,
  			      void *cookie,
  			      void *handle,
  			      u_register_t flags)
  {
  	/* Let PM SMC handler deal with PM-related requests */
  	if (is_pm_fid(smc_fid)) {
  		return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
  				      flags);
  	}
  
  	/* Let IPI SMC handler deal with IPI-related requests */
  	if (is_ipi_fid(smc_fid)) {
  		return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
  				      flags);
  	}
  
  	switch (smc_fid) {
  	case ZYNQMP_SIP_SVC_CALL_COUNT:
  		/* PM functions + default functions */
  		SMC_RET1(handle, PM_API_MAX + 2);
  
  	case ZYNQMP_SIP_SVC_UID:
  		SMC_UUID_RET(handle, zynqmp_sip_uuid);
  
  	case ZYNQMP_SIP_SVC_VERSION:
  		SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR);
  
  	default:
  		WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid);
  		SMC_RET1(handle, SMC_UNK);
  	}
  }
  
  /* Register PM Service Calls as runtime service */
  DECLARE_RT_SVC(
  		sip_svc,
  		OEN_SIP_START,
  		OEN_SIP_END,
  		SMC_TYPE_FAST,
  		sip_svc_setup,
  		sip_svc_smc_handler);
  