developer | 880fb17 | 2022-09-05 19:08:59 +0800 | [diff] [blame] | 1 | /* |
developer | 76403b7 | 2022-12-06 15:22:33 +0800 | [diff] [blame^] | 2 | * Copyright (c) 2022-2023, ARM Limited and Contributors. All rights reserved. |
developer | 880fb17 | 2022-09-05 19:08:59 +0800 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <string.h> |
| 8 | #include <common/debug.h> |
| 9 | #include <lib/mmio.h> |
| 10 | #include <emi_mpu.h> |
| 11 | #include <lib/mtk_init/mtk_init.h> |
developer | 76403b7 | 2022-12-06 15:22:33 +0800 | [diff] [blame^] | 12 | #include <mtk_sip_svc.h> |
developer | 880fb17 | 2022-09-05 19:08:59 +0800 | [diff] [blame] | 13 | |
| 14 | #if ENABLE_EMI_MPU_SW_LOCK |
| 15 | static unsigned char region_lock_state[EMI_MPU_REGION_NUM]; |
| 16 | #endif |
| 17 | |
| 18 | #define EMI_MPU_START_MASK (0x00FFFFFF) |
| 19 | #define EMI_MPU_END_MASK (0x00FFFFFF) |
| 20 | #define EMI_MPU_APC_SW_LOCK_MASK (0x00FFFFFF) |
| 21 | #define EMI_MPU_APC_HW_LOCK_MASK (0x80FFFFFF) |
| 22 | |
| 23 | static int _emi_mpu_set_protection(unsigned int start, unsigned int end, |
| 24 | unsigned int apc) |
| 25 | { |
| 26 | unsigned int dgroup; |
| 27 | unsigned int region; |
| 28 | |
| 29 | region = (start >> 24) & 0xFF; |
| 30 | start &= EMI_MPU_START_MASK; |
| 31 | dgroup = (end >> 24) & 0xFF; |
| 32 | end &= EMI_MPU_END_MASK; |
| 33 | |
| 34 | if ((region >= EMI_MPU_REGION_NUM) || (dgroup > EMI_MPU_DGROUP_NUM)) { |
| 35 | WARN("invalid region, domain\n"); |
| 36 | return -1; |
| 37 | } |
| 38 | |
| 39 | #if ENABLE_EMI_MPU_SW_LOCK |
| 40 | if (region_lock_state[region] == 1) { |
| 41 | WARN("invalid region\n"); |
| 42 | return -1; |
| 43 | } |
| 44 | |
| 45 | if ((dgroup == 0) && ((apc >> 31) & 0x1)) { |
| 46 | region_lock_state[region] = 1; |
| 47 | } |
| 48 | |
| 49 | apc &= EMI_MPU_APC_SW_LOCK_MASK; |
| 50 | #else |
| 51 | apc &= EMI_MPU_APC_HW_LOCK_MASK; |
| 52 | #endif |
| 53 | |
| 54 | if ((start >= DRAM_OFFSET) && (end >= start)) { |
| 55 | start -= DRAM_OFFSET; |
| 56 | end -= DRAM_OFFSET; |
| 57 | } else { |
| 58 | WARN("invalid range\n"); |
| 59 | return -1; |
| 60 | } |
| 61 | |
| 62 | mmio_write_32(EMI_MPU_SA(region), start); |
| 63 | mmio_write_32(EMI_MPU_EA(region), end); |
| 64 | mmio_write_32(EMI_MPU_APC(region, dgroup), apc); |
| 65 | |
| 66 | #if defined(SUB_EMI_MPU_BASE) |
| 67 | mmio_write_32(SUB_EMI_MPU_SA(region), start); |
| 68 | mmio_write_32(SUB_EMI_MPU_EA(region), end); |
| 69 | mmio_write_32(SUB_EMI_MPU_APC(region, dgroup), apc); |
| 70 | #endif |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | static void dump_emi_mpu_regions(void) |
| 75 | { |
| 76 | int region, i; |
| 77 | |
| 78 | /* Only dump 8 regions(max: EMI_MPU_REGION_NUM --> 32) */ |
| 79 | for (region = 0; region < 8; ++region) { |
| 80 | INFO("region %d:\n", region); |
| 81 | INFO("\tsa: 0x%x, ea: 0x%x\n", |
| 82 | mmio_read_32(EMI_MPU_SA(region)), mmio_read_32(EMI_MPU_EA(region))); |
| 83 | |
| 84 | for (i = 0; i < EMI_MPU_DGROUP_NUM; ++i) { |
| 85 | INFO("\tapc%d: 0x%x\n", i, mmio_read_32(EMI_MPU_APC(region, i))); |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | int emi_mpu_set_protection(struct emi_region_info_t *region_info) |
| 91 | { |
| 92 | unsigned int start, end; |
| 93 | int i; |
| 94 | |
| 95 | if (region_info->region >= EMI_MPU_REGION_NUM) { |
| 96 | WARN("invalid region\n"); |
| 97 | return -1; |
| 98 | } |
| 99 | |
| 100 | start = (unsigned int)(region_info->start >> EMI_MPU_ALIGN_BITS) | |
| 101 | (region_info->region << 24); |
| 102 | |
| 103 | for (i = EMI_MPU_DGROUP_NUM - 1; i >= 0; i--) { |
| 104 | end = (unsigned int)(region_info->end >> EMI_MPU_ALIGN_BITS) | (i << 24); |
| 105 | |
| 106 | if (_emi_mpu_set_protection(start, end, region_info->apc[i]) < 0) { |
| 107 | WARN("Failed to set emi mpu protection(%d, %d, %d)\n", |
| 108 | start, end, region_info->apc[i]); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
developer | 76403b7 | 2022-12-06 15:22:33 +0800 | [diff] [blame^] | 115 | u_register_t mtk_emi_mpu_sip_handler(u_register_t x1, u_register_t x2, |
| 116 | u_register_t x3, u_register_t x4, |
| 117 | void *handle, struct smccc_res *smccc_ret) |
| 118 | { |
| 119 | /* TODO: implement emi mpu handler */ |
| 120 | |
| 121 | return 0; |
| 122 | } |
| 123 | DECLARE_SMC_HANDLER(MTK_SIP_TEE_MPU_PERM_SET, mtk_emi_mpu_sip_handler); |
| 124 | |
developer | 880fb17 | 2022-09-05 19:08:59 +0800 | [diff] [blame] | 125 | int emi_mpu_init(void) |
| 126 | { |
| 127 | INFO("[%s] emi mpu initialization\n", __func__); |
| 128 | |
| 129 | set_emi_mpu_regions(); |
| 130 | dump_emi_mpu_regions(); |
| 131 | |
| 132 | return 0; |
| 133 | } |
| 134 | MTK_PLAT_SETUP_0_INIT(emi_mpu_init); |