mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-05-02 00:20:05 +00:00
76a21174d2
By default the Arm Ethos-N NPU will boot up in secure mode. In this mode the non-secure world cannot access the registers needed to use the NPU. To still allow the non-secure world to use the NPU, a SiP service has been added that can delegate non-secure access to the registers needed to use it. Only the HW_CONFIG for the Arm Juno platform has been updated to include the device tree for the NPU and the platform currently only loads the HW_CONFIG in AArch64 builds. Signed-off-by: Mikael Olsson <mikael.olsson@arm.com> Change-Id: I65dfd864042ed43faae0a259dcf319cbadb5f3d2
143 lines
2.9 KiB
C
143 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2016-2019,2021, ARM Limited and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <common/debug.h>
|
|
#include <common/runtime_svc.h>
|
|
#include <drivers/arm/ethosn.h>
|
|
#include <lib/debugfs.h>
|
|
#include <lib/pmf/pmf.h>
|
|
#include <plat/arm/common/arm_sip_svc.h>
|
|
#include <plat/arm/common/plat_arm.h>
|
|
#include <tools_share/uuid.h>
|
|
|
|
/* ARM SiP Service UUID */
|
|
DEFINE_SVC_UUID2(arm_sip_svc_uid,
|
|
0x556d75e2, 0x6033, 0xb54b, 0xb5, 0x75,
|
|
0x62, 0x79, 0xfd, 0x11, 0x37, 0xff);
|
|
|
|
static int arm_sip_setup(void)
|
|
{
|
|
if (pmf_setup() != 0) {
|
|
return 1;
|
|
}
|
|
|
|
#if USE_DEBUGFS
|
|
|
|
if (debugfs_smc_setup() != 0) {
|
|
return 1;
|
|
}
|
|
|
|
#endif /* USE_DEBUGFS */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This function handles ARM defined SiP Calls
|
|
*/
|
|
static uintptr_t arm_sip_handler(unsigned int 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)
|
|
{
|
|
int call_count = 0;
|
|
|
|
#if ENABLE_PMF
|
|
|
|
/*
|
|
* Dispatch PMF calls to PMF SMC handler and return its return
|
|
* value
|
|
*/
|
|
if (is_pmf_fid(smc_fid)) {
|
|
return pmf_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
|
|
handle, flags);
|
|
}
|
|
|
|
#endif /* ENABLE_PMF */
|
|
|
|
#if USE_DEBUGFS
|
|
|
|
if (is_debugfs_fid(smc_fid)) {
|
|
return debugfs_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
|
|
handle, flags);
|
|
}
|
|
|
|
#endif /* USE_DEBUGFS */
|
|
|
|
#if ARM_ETHOSN_NPU_DRIVER
|
|
|
|
if (is_ethosn_fid(smc_fid)) {
|
|
return ethosn_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
|
|
handle, flags);
|
|
}
|
|
|
|
#endif /* ARM_ETHOSN_NPU_DRIVER */
|
|
|
|
switch (smc_fid) {
|
|
case ARM_SIP_SVC_EXE_STATE_SWITCH: {
|
|
/* Execution state can be switched only if EL3 is AArch64 */
|
|
#ifdef __aarch64__
|
|
/* Allow calls from non-secure only */
|
|
if (!is_caller_non_secure(flags))
|
|
SMC_RET1(handle, STATE_SW_E_DENIED);
|
|
|
|
/*
|
|
* Pointers used in execution state switch are all 32 bits wide
|
|
*/
|
|
return (uintptr_t) arm_execution_state_switch(smc_fid,
|
|
(uint32_t) x1, (uint32_t) x2, (uint32_t) x3,
|
|
(uint32_t) x4, handle);
|
|
#else
|
|
/* State switch denied */
|
|
SMC_RET1(handle, STATE_SW_E_DENIED);
|
|
#endif /* __aarch64__ */
|
|
}
|
|
|
|
case ARM_SIP_SVC_CALL_COUNT:
|
|
/* PMF calls */
|
|
call_count += PMF_NUM_SMC_CALLS;
|
|
|
|
#if ARM_ETHOSN_NPU_DRIVER
|
|
/* ETHOSN calls */
|
|
call_count += ETHOSN_NUM_SMC_CALLS;
|
|
#endif /* ARM_ETHOSN_NPU_DRIVER */
|
|
|
|
/* State switch call */
|
|
call_count += 1;
|
|
|
|
SMC_RET1(handle, call_count);
|
|
|
|
case ARM_SIP_SVC_UID:
|
|
/* Return UID to the caller */
|
|
SMC_UUID_RET(handle, arm_sip_svc_uid);
|
|
|
|
case ARM_SIP_SVC_VERSION:
|
|
/* Return the version of current implementation */
|
|
SMC_RET2(handle, ARM_SIP_SVC_VERSION_MAJOR, ARM_SIP_SVC_VERSION_MINOR);
|
|
|
|
default:
|
|
WARN("Unimplemented ARM SiP Service Call: 0x%x \n", smc_fid);
|
|
SMC_RET1(handle, SMC_UNK);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
/* Define a runtime service descriptor for fast SMC calls */
|
|
DECLARE_RT_SVC(
|
|
arm_sip_svc,
|
|
OEN_SIP_START,
|
|
OEN_SIP_END,
|
|
SMC_TYPE_FAST,
|
|
arm_sip_setup,
|
|
arm_sip_handler
|
|
);
|