104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
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* Copyright (c) 2019-2020, NVIDIA CORPORATION. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <arch.h>
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#include <arch_helpers.h>
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#include <assert.h>
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#include <common/bl_common.h>
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#include <lib/el3_runtime/context_mgmt.h>
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#include <common/debug.h>
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#include <errno.h>
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#include <mce.h>
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#include <mce_private.h>
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#include <memctrl.h>
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#include <common/runtime_svc.h>
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#include <tegra_private.h>
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#include <tegra_platform.h>
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#include <smmu.h>
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#include <stdbool.h>
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/*******************************************************************************
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* Tegra194 SiP SMCs
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******************************************************************************/
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#define TEGRA_SIP_GET_SMMU_PER 0xC200FF00U
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#define TEGRA_SIP_CLEAR_RAS_CORRECTED_ERRORS 0xC200FF01U
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/*******************************************************************************
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* This function is responsible for handling all T194 SiP calls
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******************************************************************************/
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int32_t plat_sip_handler(uint32_t smc_fid,
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uint64_t x1,
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uint64_t x2,
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uint64_t x3,
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uint64_t x4,
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const void *cookie,
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void *handle,
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uint64_t flags)
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{
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int32_t ret = 0;
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uint32_t i, smmu_per[6] = {0};
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uint32_t num_smmu_devices = plat_get_num_smmu_devices();
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uint64_t per[3] = {0ULL};
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(void)x1;
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(void)x4;
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(void)cookie;
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(void)flags;
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switch (smc_fid) {
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case TEGRA_SIP_GET_SMMU_PER:
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/* make sure we dont go past the array length */
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assert(num_smmu_devices <= ARRAY_SIZE(smmu_per));
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/* read all supported SMMU_PER records */
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for (i = 0U; i < num_smmu_devices; i++) {
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smmu_per[i] = tegra_smmu_read_32(i, SMMU_GSR0_PER);
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}
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/* pack results into 3 64bit variables. */
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per[0] = smmu_per[0] | ((uint64_t)smmu_per[1] << 32U);
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per[1] = smmu_per[2] | ((uint64_t)smmu_per[3] << 32U);
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per[2] = smmu_per[4] | ((uint64_t)smmu_per[5] << 32U);
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/* provide the results via X1-X3 CPU registers */
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write_ctx_reg(get_gpregs_ctx(handle), CTX_GPREG_X1, per[0]);
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write_ctx_reg(get_gpregs_ctx(handle), CTX_GPREG_X2, per[1]);
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write_ctx_reg(get_gpregs_ctx(handle), CTX_GPREG_X3, per[2]);
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break;
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#if RAS_FFH_SUPPORT
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case TEGRA_SIP_CLEAR_RAS_CORRECTED_ERRORS:
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{
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/*
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* clear all RAS error records for corrected errors at first.
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* x1 shall be 0 for first SMC call after FHI is asserted.
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* */
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uint64_t local_x1 = x1;
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tegra194_ras_corrected_err_clear(&local_x1);
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if (local_x1 == 0ULL) {
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/* clear HSM corrected error status after all corrected
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* RAS errors are cleared.
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*/
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mce_clear_hsm_corr_status();
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}
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write_ctx_reg(get_gpregs_ctx(handle), CTX_GPREG_X1, local_x1);
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break;
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}
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#endif
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default:
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ret = -ENOTSUP;
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break;
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}
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return ret;
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}
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