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https://github.com/Atmosphere-NX/Atmosphere.git
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40 lines
1.6 KiB
C
40 lines
1.6 KiB
C
/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include "mc.h"
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#include "utils.h"
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void disable_bpmp_access_to_dram(void) {
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/* Modify carveout 4 to prevent BPMP access to dram (TZ will fix it). */
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volatile security_carveout_t *carveout = (volatile security_carveout_t *)(MC_BASE + 0xC08 + 0x50 * (4 - CARVEOUT_ID_MIN));
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carveout->paddr_low = 0;
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carveout->paddr_high = 0;
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carveout->size_big_pages = 1; /* 128 KiB */
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carveout->client_access_0 = 0;
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carveout->client_access_1 = 0;
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carveout->client_access_2 = 0;
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carveout->client_access_3 = 0;
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carveout->client_access_4 = 0;
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carveout->client_force_internal_access_0 = BIT(CSR_AVPCARM7R);
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carveout->client_force_internal_access_1 = BIT(CSW_AVPCARM7W);
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carveout->client_force_internal_access_2 = 0;
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carveout->client_force_internal_access_3 = 0;
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carveout->client_force_internal_access_4 = 0;
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/* Set config to LOCKED, TZ-SECURE, untranslated addresses only. */
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carveout->config = 0x8F;
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}
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