blob: ddc7ad3e8a99ca32a9750f467a468df9ae0d7771 [file] [log] [blame]
/*
* Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <stdint.h>
#include <common/debug.h>
#include <common/runtime_svc.h>
#include <lib/el3_runtime/cpu_data.h>
#include <lib/pmf/pmf.h>
#include <lib/psci/psci.h>
#include <lib/runtime_instr.h>
#include <services/sdei.h>
#include <services/spm_mm_svc.h>
#include <services/spmd_svc.h>
#include <services/std_svc.h>
#include <smccc_helpers.h>
#include <tools_share/uuid.h>
/* Standard Service UUID */
static uuid_t arm_svc_uid = {
{0x5b, 0x90, 0x8d, 0x10},
{0x63, 0xf8},
{0xe8, 0x47},
0xae, 0x2d,
{0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2}
};
/* Setup Standard Services */
static int32_t std_svc_setup(void)
{
uintptr_t svc_arg;
int ret = 0;
svc_arg = get_arm_std_svc_args(PSCI_FID_MASK);
assert(svc_arg);
/*
* PSCI is one of the specifications implemented as a Standard Service.
* The `psci_setup()` also does EL3 architectural setup.
*/
if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) {
ret = 1;
}
#if SPM_MM
if (spm_mm_setup() != 0) {
ret = 1;
}
#endif
#if defined(SPD_spmd)
if (spmd_setup() != 0) {
ret = 1;
}
#endif
#if SDEI_SUPPORT
/* SDEI initialisation */
sdei_init();
#endif
return ret;
}
/*
* Top-level Standard Service SMC handler. This handler will in turn dispatch
* calls to PSCI SMC handler
*/
static uintptr_t std_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)
{
/*
* Dispatch PSCI calls to PSCI SMC handler and return its return
* value
*/
if (is_psci_fid(smc_fid)) {
uint64_t ret;
#if ENABLE_RUNTIME_INSTRUMENTATION
/*
* Flush cache line so that even if CPU power down happens
* the timestamp update is reflected in memory.
*/
PMF_WRITE_TIMESTAMP(rt_instr_svc,
RT_INSTR_ENTER_PSCI,
PMF_CACHE_MAINT,
get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX]));
#endif
ret = psci_smc_handler(smc_fid, x1, x2, x3, x4,
cookie, handle, flags);
#if ENABLE_RUNTIME_INSTRUMENTATION
PMF_CAPTURE_TIMESTAMP(rt_instr_svc,
RT_INSTR_EXIT_PSCI,
PMF_NO_CACHE_MAINT);
#endif
SMC_RET1(handle, ret);
}
#if SPM_MM || TRUSTY_SPM
/*
* Dispatch SPM calls to SPM SMC handler and return its return
* value
*/
if (is_spm_mm_fid(smc_fid)) {
return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
handle, flags);
}
#endif
#if defined(SPD_spmd)
/*
* Dispatch FFA calls to the FFA SMC handler implemented by the SPM
* dispatcher and return its return value
*/
if (is_ffa_fid(smc_fid)) {
return spmd_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
handle, flags);
}
#endif
#if SDEI_SUPPORT
if (is_sdei_fid(smc_fid)) {
return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
flags);
}
#endif
switch (smc_fid) {
case ARM_STD_SVC_CALL_COUNT:
/*
* Return the number of Standard Service Calls. PSCI is the only
* standard service implemented; so return number of PSCI calls
*/
SMC_RET1(handle, PSCI_NUM_CALLS);
case ARM_STD_SVC_UID:
/* Return UID to the caller */
SMC_UUID_RET(handle, arm_svc_uid);
case ARM_STD_SVC_VERSION:
/* Return the version of current implementation */
SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR);
default:
WARN("Unimplemented Standard Service Call: 0x%x \n", smc_fid);
SMC_RET1(handle, SMC_UNK);
}
}
/* Register Standard Service Calls as runtime service */
DECLARE_RT_SVC(
std_svc,
OEN_STD_START,
OEN_STD_END,
SMC_TYPE_FAST,
std_svc_setup,
std_svc_smc_handler
);