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/*
* Copyright (c) 2018-2019, Arm Limited and Contributors. All rights reserved.
* Copyright (c) 2018-2022, Xilinx, Inc. All rights reserved.
* Copyright (C) 2022, Advanced Micro Devices, Inc. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
/* Top level SMC handler for SiP calls. Dispatch PM calls to PM SMC handler. */
#include <errno.h>
#include <inttypes.h>
#include <common/debug.h>
#include <common/runtime_svc.h>
#include <tools_share/uuid.h>
#include "ipi_mailbox_svc.h"
#include "plat_private.h"
#include "pm_svc_main.h"
/* SMC function IDs for SiP Service queries */
#define VERSAL_NET_SIP_SVC_CALL_COUNT (0x8200ff00U)
#define VERSAL_NET_SIP_SVC_UID (0x8200ff01U)
#define VERSAL_NET_SIP_SVC_VERSION (0x8200ff03U)
/* SiP Service Calls version numbers */
#define SIP_SVC_VERSION_MAJOR (0U)
#define SIP_SVC_VERSION_MINOR (1U)
/* These macros are used to identify PM calls from the SMC function ID */
#define SIP_FID_MASK GENMASK(23, 16)
#define XLNX_FID_MASK GENMASK(23, 12)
#define PM_FID_VALUE 0u
#define IPI_FID_VALUE 0x1000u
#define is_pm_fid(_fid) (((_fid) & XLNX_FID_MASK) == PM_FID_VALUE)
#define is_ipi_fid(_fid) (((_fid) & XLNX_FID_MASK) == IPI_FID_VALUE)
/* SiP Service UUID */
DEFINE_SVC_UUID2(versal_net_sip_uuid,
0x80d4c25a, 0xebaf, 0x11eb, 0x94, 0x68,
0x0b, 0x4e, 0x3b, 0x8f, 0xc3, 0x60);
/**
* sip_svc_setup() - Setup SiP Service
*/
static int32_t sip_svc_setup(void)
{
return sip_svc_setup_init();
}
/*
* 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.
*/
static 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)
{
VERBOSE("SMCID: 0x%08x, x1: 0x%016" PRIx64 ", x2: 0x%016" PRIx64 ", x3: 0x%016" PRIx64 ", x4: 0x%016" PRIx64 "\n",
smc_fid, x1, x2, x3, x4);
if (smc_fid & SIP_FID_MASK) {
WARN("SMC out of SiP assinged range: 0x%x\n", smc_fid);
SMC_RET1(handle, SMC_UNK);
}
/* Let PM SMC handler deal with PM-related requests */
if (is_pm_fid(smc_fid)) {
return smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
flags);
}
/* Let IPI SMC handler deal with IPI-related requests if platform */
if (is_ipi_fid(smc_fid)) {
return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags);
}
/* Let PM SMC handler deal with PM-related requests */
switch (smc_fid) {
case VERSAL_NET_SIP_SVC_CALL_COUNT:
/* PM functions + default functions */
SMC_RET1(handle, 2);
case VERSAL_NET_SIP_SVC_UID:
SMC_UUID_RET(handle, versal_net_sip_uuid);
case VERSAL_NET_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);
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