developer | 644ec1c | 2019-08-23 15:50:58 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <common/debug.h> |
| 8 | #include <lib/mmio.h> |
| 9 | #include <emi_mpu.h> |
| 10 | |
| 11 | int is_4GB(void) |
| 12 | { |
| 13 | return 0; /* 8183 doesn't use 4GB */ |
| 14 | } |
| 15 | |
| 16 | /* |
| 17 | * emi_mpu_set_region_protection: protect a region. |
| 18 | * @start: start address of the region |
| 19 | * @end: end address of the region |
| 20 | * @region: EMI MPU region id |
| 21 | * @access_permission: EMI MPU access permission |
| 22 | * Return 0 for success, otherwise negative status code. |
| 23 | */ |
| 24 | int emi_mpu_set_region_protection( |
| 25 | unsigned long start, unsigned long end, |
| 26 | int region, |
| 27 | unsigned int access_permission) |
| 28 | { |
| 29 | int ret = 0; |
| 30 | |
| 31 | if (end <= start) { |
| 32 | ERROR("[EMI][MTEE][MPU] Invalid address!.\n"); |
| 33 | return -1; |
| 34 | } |
| 35 | |
| 36 | if (is_4GB()) { |
| 37 | /* 4GB mode: emi_addr = phy_addr & 0xffff */ |
| 38 | start = EMI_PHY_OFFSET & 0xffff; |
| 39 | end = EMI_PHY_OFFSET & 0xffff; |
| 40 | } else { |
| 41 | /* non-4GB mode: emi_addr = phy_addr - MEM_OFFSET */ |
| 42 | start = start - EMI_PHY_OFFSET; |
| 43 | end = end - EMI_PHY_OFFSET; |
| 44 | } |
| 45 | |
| 46 | /*Address 64KB alignment*/ |
| 47 | start = start >> 16; |
| 48 | end = end >> 16; |
| 49 | |
| 50 | switch (region) { |
| 51 | case 0: |
| 52 | mmio_write_32(EMI_MPU_APC0, 0); |
| 53 | mmio_write_32(EMI_MPU_SA0, start); |
| 54 | mmio_write_32(EMI_MPU_EA0, end); |
| 55 | mmio_write_32(EMI_MPU_APC0, access_permission); |
| 56 | break; |
| 57 | |
| 58 | case 1: |
| 59 | mmio_write_32(EMI_MPU_APC1, 0); |
| 60 | mmio_write_32(EMI_MPU_SA1, start); |
| 61 | mmio_write_32(EMI_MPU_EA1, end); |
| 62 | mmio_write_32(EMI_MPU_APC1, access_permission); |
| 63 | break; |
| 64 | |
| 65 | case 2: |
| 66 | mmio_write_32(EMI_MPU_APC2, 0); |
| 67 | mmio_write_32(EMI_MPU_SA2, start); |
| 68 | mmio_write_32(EMI_MPU_EA2, end); |
| 69 | mmio_write_32(EMI_MPU_APC2, access_permission); |
| 70 | break; |
| 71 | |
| 72 | case 3: |
| 73 | mmio_write_32(EMI_MPU_APC3, 0); |
| 74 | mmio_write_32(EMI_MPU_SA3, start); |
| 75 | mmio_write_32(EMI_MPU_EA3, end); |
| 76 | mmio_write_32(EMI_MPU_APC3, access_permission); |
| 77 | break; |
| 78 | |
| 79 | case 4: |
| 80 | mmio_write_32(EMI_MPU_APC4, 0); |
| 81 | mmio_write_32(EMI_MPU_SA4, start); |
| 82 | mmio_write_32(EMI_MPU_EA4, end); |
| 83 | mmio_write_32(EMI_MPU_APC4, access_permission); |
| 84 | break; |
| 85 | |
| 86 | case 5: |
| 87 | mmio_write_32(EMI_MPU_APC5, 0); |
| 88 | mmio_write_32(EMI_MPU_SA5, start); |
| 89 | mmio_write_32(EMI_MPU_EA5, end); |
| 90 | mmio_write_32(EMI_MPU_APC5, access_permission); |
| 91 | break; |
| 92 | |
| 93 | case 6: |
| 94 | mmio_write_32(EMI_MPU_APC6, 0); |
| 95 | mmio_write_32(EMI_MPU_SA6, start); |
| 96 | mmio_write_32(EMI_MPU_EA6, end); |
| 97 | mmio_write_32(EMI_MPU_APC6, access_permission); |
| 98 | break; |
| 99 | |
| 100 | case 7: |
| 101 | mmio_write_32(EMI_MPU_APC7, 0); |
| 102 | mmio_write_32(EMI_MPU_SA7, start); |
| 103 | mmio_write_32(EMI_MPU_EA7, end); |
| 104 | mmio_write_32(EMI_MPU_APC7, access_permission); |
| 105 | break; |
| 106 | |
| 107 | default: |
| 108 | ret = -1; |
| 109 | break; |
| 110 | } |
| 111 | |
| 112 | return ret; |
| 113 | } |
| 114 | |
| 115 | void dump_emi_mpu_regions(void) |
| 116 | { |
| 117 | unsigned int apc, sa, ea; |
| 118 | unsigned int apc_addr = EMI_MPU_APC0; |
| 119 | unsigned int sa_addr = EMI_MPU_SA0; |
| 120 | unsigned int ea_addr = EMI_MPU_EA0; |
| 121 | int i; |
| 122 | |
| 123 | for (i = 0; i < 8; ++i) { |
| 124 | apc = mmio_read_32(apc_addr + i * 4); |
| 125 | sa = mmio_read_32(sa_addr + i * 4); |
| 126 | ea = mmio_read_32(ea_addr + i * 4); |
| 127 | WARN("region %d:\n", i); |
| 128 | WARN("\tapc:0x%x, sa:0x%x, ea:0x%x\n", apc, sa, ea); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | void emi_mpu_init(void) |
| 133 | { |
| 134 | /* Set permission */ |
| 135 | emi_mpu_set_region_protection(0x40000000UL, 0x4FFFFFFFUL, 0, |
| 136 | (FORBIDDEN << 3 | FORBIDDEN << 6)); |
| 137 | emi_mpu_set_region_protection(0x50000000UL, 0x528FFFFFUL, 1, |
| 138 | (FORBIDDEN << 6)); |
| 139 | emi_mpu_set_region_protection(0x52900000UL, 0x5FFFFFFFUL, 2, |
| 140 | (FORBIDDEN << 3 | FORBIDDEN << 6)); |
| 141 | emi_mpu_set_region_protection(0x60000000UL, 0x7FFFFFFFUL, 3, |
| 142 | (FORBIDDEN << 3 | FORBIDDEN << 6)); |
| 143 | emi_mpu_set_region_protection(0x80000000UL, 0x9FFFFFFFUL, 4, |
| 144 | (FORBIDDEN << 3 | FORBIDDEN << 6)); |
| 145 | emi_mpu_set_region_protection(0xA0000000UL, 0xBFFFFFFFUL, 5, |
| 146 | (FORBIDDEN << 3 | FORBIDDEN << 6)); |
| 147 | emi_mpu_set_region_protection(0xC0000000UL, 0xDFFFFFFFUL, 6, |
| 148 | (FORBIDDEN << 3 | FORBIDDEN << 6)); |
| 149 | emi_mpu_set_region_protection(0xE0000000UL, 0xFFFFFFFFUL, 7, |
| 150 | (FORBIDDEN << 3 | FORBIDDEN << 6)); |
| 151 | dump_emi_mpu_regions(); |
| 152 | } |
| 153 | |