blob: 4007d5c8f7390cb69aa3005c5ee43f720f22b621 [file] [log] [blame]
/*
* Copyright (c) 2018, 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 <debug.h>
#include <runtime_svc.h>
#include <uuid.h>
/* SMC function IDs for SiP Service queries */
#define VERSAL_SIP_SVC_CALL_COUNT 0x8200ff00
#define VERSAL_SIP_SVC_UID 0x8200ff01
#define VERSAL_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 calls from the SMC function ID */
#define PM_FID_MASK 0xf000u
#define PM_FID_VALUE 0u
#define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE)
/* SiP Service UUID */
DEFINE_SVC_UUID2(versal_sip_uuid,
0x2ab9e4ec, 0x93b9, 0x11e7, 0xa0, 0x19,
0xdf, 0xe0, 0xdb, 0xad, 0x0a, 0xe0);
/**
* sip_svc_setup() - Setup SiP Service
*
* Invokes PM setup
*/
static int32_t sip_svc_setup(void)
{
return 0;
}
/**
* 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 */
switch (smc_fid) {
case VERSAL_SIP_SVC_CALL_COUNT:
/* PM functions + default functions */
SMC_RET1(handle, 2);
case VERSAL_SIP_SVC_UID:
SMC_UUID_RET(handle, versal_sip_uuid);
case VERSAL_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);