1 /* 2 * Copyright (c) 2024-2025, MediaTek Inc. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #define ENABLE_SMPU_PROTECT (1) 8 9 #include <common/debug.h> 10 #include <lib/mmio.h> 11 12 #include <apusys_security_ctrl_plat.h> 13 #include <mtk_bl31_interface.h> 14 15 #define APUSYS_SEC_FW_EMI_REGION (23) 16 17 #define bits_clr(x, m, o) (x & (~(m << o))) 18 #define bits_set(x, v, m, o) ((bits_clr(x, m, o)) | ((v & m) << o)) 19 20 static void sec_sideband_init(void) 21 { 22 uint32_t value = mmio_read_32(SEC_CTRL_SIDE_BAND); 23 24 value = bits_set(value, SEC_CTRL_NARE_DOMAIN, SEC_CTRL_DOMAIN_MASK, 25 SEC_CTRL_NARE_DOMAIN_SHF); 26 value = bits_set(value, SEC_CTRL_NARE_NS, SEC_CTRL_NS_MASK, SEC_CTRL_NARE_NS_SHF); 27 value = bits_set(value, SEC_CTRL_SARE0_DOMAIN, SEC_CTRL_DOMAIN_MASK, 28 SEC_CTRL_SARE0_DOMAIN_SHF); 29 value = bits_set(value, SEC_CTRL_SARE0_NS, SEC_CTRL_NS_MASK, SEC_CTRL_SARE0_NS_SHF); 30 value = bits_set(value, SEC_CTRL_SARE1_DOMAIN, SEC_CTRL_DOMAIN_MASK, 31 SEC_CTRL_SARE1_DOMAIN_SHF); 32 value = bits_set(value, SEC_CTRL_SARE1_NS, SEC_CTRL_NS_MASK, SEC_CTRL_SARE1_NS_SHF); 33 34 mmio_write_32(SEC_CTRL_SIDE_BAND, value); 35 } 36 37 static void domain_remap_init(void) 38 { 39 const uint32_t remap_domains[] = { 40 D0_REMAP_DOMAIN, D1_REMAP_DOMAIN, D2_REMAP_DOMAIN, D3_REMAP_DOMAIN, 41 D4_REMAP_DOMAIN, D5_REMAP_DOMAIN, D6_REMAP_DOMAIN, D7_REMAP_DOMAIN, 42 D8_REMAP_DOMAIN, D9_REMAP_DOMAIN, D10_REMAP_DOMAIN, D11_REMAP_DOMAIN, 43 D12_REMAP_DOMAIN, D13_REMAP_DOMAIN, D14_REMAP_DOMAIN, D15_REMAP_DOMAIN, 44 }; 45 uint32_t lower_domain = 0; 46 uint32_t higher_domain = 0; 47 int i; 48 49 for (i = 0; i < ARRAY_SIZE(remap_domains); i++) { 50 if (i < SEC_CTRL_REG_DOMAIN_NUM) 51 lower_domain |= (remap_domains[i] << (i * REG_DOMAIN_BITS)); 52 else 53 higher_domain |= (remap_domains[i] << 54 ((i - SEC_CTRL_REG_DOMAIN_NUM) * REG_DOMAIN_BITS)); 55 } 56 57 mmio_write_32(SEC_CTRL_SOC2APU_SET1_0, lower_domain); 58 mmio_write_32(SEC_CTRL_SOC2APU_SET1_1, higher_domain); 59 mmio_setbits_32(APU_SEC_CON, SEC_CTRL_DOMAIN_REMAP_SEL); 60 } 61 62 void apusys_security_ctrl_init(void) 63 { 64 domain_remap_init(); 65 sec_sideband_init(); 66 } 67 68 int apusys_plat_setup_sec_mem(void) 69 { 70 #if ENABLE_SMPU_PROTECT 71 return emi_mpu_set_protection(APU_RESERVE_MEMORY >> EMI_MPU_ALIGN_BITS, 72 (APU_RESERVE_MEMORY + APU_RESERVE_SIZE) >> 73 EMI_MPU_ALIGN_BITS, 74 APUSYS_SEC_FW_EMI_REGION); 75 #else 76 INFO("%s: Bypass SMPU protection setup.\n", __func__); 77 return 0; 78 #endif 79 } 80