developer | bd48115 | 2020-11-02 10:45:34 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2020, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <common/debug.h> |
| 8 | #include <emi_mpu.h> |
| 9 | #include <lib/mmio.h> |
| 10 | |
| 11 | /* |
| 12 | * emi_mpu_set_region_protection: protect a region. |
| 13 | * @start: start address of the region |
| 14 | * @end: end address of the region |
| 15 | * @access_permission: EMI MPU access permission |
| 16 | * Return 0 for success, otherwise negative status code. |
| 17 | */ |
| 18 | static int _emi_mpu_set_protection( |
| 19 | unsigned long start, unsigned long end, |
| 20 | unsigned int apc) |
| 21 | { |
| 22 | unsigned int dgroup; |
| 23 | unsigned int region; |
| 24 | |
| 25 | region = (start >> 24) & 0xFF; |
| 26 | start &= 0x00FFFFFF; |
| 27 | dgroup = (end >> 24) & 0xFF; |
| 28 | end &= 0x00FFFFFF; |
| 29 | |
| 30 | if ((region >= EMI_MPU_REGION_NUM) || (dgroup > EMI_MPU_DGROUP_NUM)) { |
| 31 | WARN("Region:%u or dgroup:%u is wrong!\n", region, dgroup); |
| 32 | return -1; |
| 33 | } |
| 34 | |
| 35 | apc &= 0x80FFFFFF; |
| 36 | |
| 37 | if ((start >= DRAM_OFFSET) && (end >= start)) { |
| 38 | start -= DRAM_OFFSET; |
| 39 | end -= DRAM_OFFSET; |
| 40 | } else { |
| 41 | WARN("start:0x%lx or end:0x%lx address is wrong!\n", |
| 42 | start, end); |
| 43 | return -2; |
| 44 | } |
| 45 | |
| 46 | mmio_write_32(EMI_MPU_SA(region), start); |
| 47 | mmio_write_32(EMI_MPU_EA(region), end); |
| 48 | mmio_write_32(EMI_MPU_APC(region, dgroup), apc); |
| 49 | |
| 50 | return 0; |
| 51 | } |
| 52 | |
| 53 | void dump_emi_mpu_regions(void) |
| 54 | { |
| 55 | unsigned long apc[EMI_MPU_DGROUP_NUM], sa, ea; |
| 56 | |
| 57 | int region, i; |
| 58 | |
| 59 | /* Only dump 8 regions(max: EMI_MPU_REGION_NUM --> 32) */ |
| 60 | for (region = 0; region < 8; ++region) { |
| 61 | for (i = 0; i < EMI_MPU_DGROUP_NUM; ++i) |
| 62 | apc[i] = mmio_read_32(EMI_MPU_APC(region, i)); |
| 63 | sa = mmio_read_32(EMI_MPU_SA(region)); |
| 64 | ea = mmio_read_32(EMI_MPU_EA(region)); |
| 65 | |
| 66 | WARN("region %d:\n", region); |
| 67 | WARN("\tsa:0x%lx, ea:0x%lx, apc0: 0x%lx apc1: 0x%lx\n", |
| 68 | sa, ea, apc[0], apc[1]); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | int emi_mpu_set_protection(struct emi_region_info_t *region_info) |
| 73 | { |
| 74 | unsigned long start, end; |
| 75 | int i; |
| 76 | |
| 77 | if (region_info->region >= EMI_MPU_REGION_NUM) |
| 78 | return -1; |
| 79 | |
| 80 | start = (unsigned long)(region_info->start >> EMI_MPU_ALIGN_BITS) | |
| 81 | (region_info->region << 24); |
| 82 | |
| 83 | for (i = EMI_MPU_DGROUP_NUM - 1; i >= 0; i--) { |
| 84 | end = (unsigned long)(region_info->end >> EMI_MPU_ALIGN_BITS) | |
| 85 | (i << 24); |
| 86 | _emi_mpu_set_protection(start, end, region_info->apc[i]); |
| 87 | } |
| 88 | |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | void emi_mpu_init(void) |
| 93 | { |
developer | bd48115 | 2020-11-02 10:45:34 +0800 | [diff] [blame] | 94 | struct emi_region_info_t region_info; |
| 95 | |
developer | e96daea | 2021-01-06 16:05:01 +0800 | [diff] [blame^] | 96 | /* reserve region 0 for future use */ |
| 97 | |
| 98 | /* PCI-e protect address(64MB) */ |
| 99 | region_info.start = 0xC0000000ULL; |
| 100 | region_info.end = 0xC3FF0000ULL; |
developer | bd48115 | 2020-11-02 10:45:34 +0800 | [diff] [blame] | 101 | region_info.region = 1; |
| 102 | SET_ACCESS_PERMISSION(region_info.apc, 1, |
| 103 | FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| 104 | FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| 105 | FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
developer | e96daea | 2021-01-06 16:05:01 +0800 | [diff] [blame^] | 106 | FORBIDDEN, FORBIDDEN, NO_PROT, NO_PROT); |
| 107 | emi_mpu_set_protection(®ion_info); |
| 108 | |
| 109 | /* SCP protect address */ |
| 110 | region_info.start = 0x50000000ULL; |
| 111 | region_info.end = 0x513F0000ULL; |
| 112 | region_info.region = 2; |
| 113 | SET_ACCESS_PERMISSION(region_info.apc, 1, |
| 114 | FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| 115 | FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| 116 | FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| 117 | NO_PROT, FORBIDDEN, FORBIDDEN, NO_PROT); |
developer | bd48115 | 2020-11-02 10:45:34 +0800 | [diff] [blame] | 118 | emi_mpu_set_protection(®ion_info); |
| 119 | |
| 120 | /* Forbidden All */ |
| 121 | region_info.start = 0x40000000ULL; /* dram base addr */ |
| 122 | region_info.end = 0x1FFFF0000ULL; |
developer | e96daea | 2021-01-06 16:05:01 +0800 | [diff] [blame^] | 123 | region_info.region = 3; |
developer | bd48115 | 2020-11-02 10:45:34 +0800 | [diff] [blame] | 124 | SET_ACCESS_PERMISSION(region_info.apc, 1, |
developer | e96daea | 2021-01-06 16:05:01 +0800 | [diff] [blame^] | 125 | FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| 126 | FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| 127 | FORBIDDEN, FORBIDDEN, FORBIDDEN, FORBIDDEN, |
| 128 | FORBIDDEN, FORBIDDEN, FORBIDDEN, NO_PROT); |
developer | bd48115 | 2020-11-02 10:45:34 +0800 | [diff] [blame] | 129 | emi_mpu_set_protection(®ion_info); |
| 130 | |
| 131 | dump_emi_mpu_regions(); |
| 132 | } |
| 133 | |