| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2015, Linaro Ltd and Contributors. All rights reserved. |
| 3 | * Copyright (c) 2015, Hisilicon Ltd and Contributors. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions are met: |
| 7 | * |
| 8 | * Redistributions of source code must retain the above copyright notice, this |
| 9 | * list of conditions and the following disclaimer. |
| 10 | * |
| 11 | * Redistributions in binary form must reproduce the above copyright notice, |
| 12 | * this list of conditions and the following disclaimer in the documentation |
| 13 | * and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * Neither the name of ARM nor the names of its contributors may be used |
| 16 | * to endorse or promote products derived from this software without specific |
| 17 | * prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <debug.h> |
| 33 | #include <stdint.h> |
| 34 | #include <strings.h> |
| 35 | #include <platform_def.h> |
| 36 | |
| 37 | #define PORTNUM_MAX 5 |
| 38 | |
| 39 | #define MDDRC_SECURITY_BASE 0xF7121000 |
| 40 | |
| 41 | struct int_en_reg { |
| 42 | unsigned in_en:1; |
| 43 | unsigned reserved:31; |
| 44 | }; |
| 45 | |
| 46 | struct rgn_map_reg { |
| 47 | unsigned rgn_base_addr:24; |
| 48 | unsigned rgn_size:6; |
| 49 | unsigned reserved:1; |
| 50 | unsigned rgn_en:1; |
| 51 | }; |
| 52 | |
| 53 | struct rgn_attr_reg { |
| 54 | unsigned sp:4; |
| 55 | unsigned security_inv:1; |
| 56 | unsigned reserved_0:3; |
| 57 | unsigned mid_en:1; |
| 58 | unsigned mid_inv:1; |
| 59 | unsigned reserved_1:6; |
| 60 | unsigned rgn_en:1; |
| 61 | unsigned subrgn_disable:16; |
| 62 | }; |
| 63 | |
| 64 | static volatile struct int_en_reg *get_int_en_reg(uint32_t base) |
| 65 | { |
| 66 | uint64_t addr = base + 0x20; |
| 67 | return (struct int_en_reg *)addr; |
| 68 | } |
| 69 | |
| 70 | static volatile struct rgn_map_reg *get_rgn_map_reg(uint32_t base, int region, int port) |
| 71 | { |
| 72 | uint64_t addr = base + 0x100 + 0x10 * region + 0x400 * port; |
| 73 | return (struct rgn_map_reg *)addr; |
| 74 | } |
| 75 | |
| 76 | static volatile struct rgn_attr_reg *get_rgn_attr_reg(uint32_t base, int region, |
| 77 | int port) |
| 78 | { |
| 79 | uint64_t addr = base + 0x104 + 0x10 * region + 0x400 * port; |
| 80 | return (struct rgn_attr_reg *)addr; |
| 81 | } |
| 82 | |
| 83 | static int is_power_of_two(uint32_t x) |
| 84 | { |
| 85 | return ((x != 0) && !(x & (x - 1))); |
| 86 | } |
| 87 | |
| 88 | /* |
| 89 | * Configure secure memory region |
| 90 | * region_size must be a power of 2 and at least 64KB |
| 91 | * region_base must be region_size aligned |
| 92 | */ |
| 93 | static void sec_protect(uint32_t region_base, uint32_t region_size) |
| 94 | { |
| 95 | volatile struct int_en_reg *int_en_reg ; |
| 96 | volatile struct rgn_map_reg *rgn_map_reg; |
| 97 | volatile struct rgn_attr_reg *rgn_attr_reg; |
| 98 | uint32_t i = 0; |
| 99 | |
| 100 | if (!is_power_of_two(region_size) || region_size < 0x10000) { |
| 101 | ERROR("Secure region size is not a power of 2 >= 64KB\n"); |
| 102 | return; |
| 103 | } |
| 104 | if (region_base & (region_size - 1)) { |
| 105 | ERROR("Secure region address is not aligned to region size\n"); |
| 106 | return; |
| 107 | } |
| 108 | |
| 109 | INFO("BL2: TrustZone: protecting %u bytes of memory at 0x%x\n", region_size, |
| 110 | region_base); |
| 111 | |
| 112 | int_en_reg = get_int_en_reg(MDDRC_SECURITY_BASE); |
| 113 | int_en_reg->in_en = 0x1; |
| 114 | |
| 115 | for (i = 0; i < PORTNUM_MAX; i++) { |
| 116 | rgn_map_reg = get_rgn_map_reg(MDDRC_SECURITY_BASE, 1, i); |
| 117 | rgn_attr_reg = get_rgn_attr_reg(MDDRC_SECURITY_BASE, 1, i); |
| 118 | rgn_map_reg->rgn_base_addr = region_base >> 16; |
| 119 | rgn_attr_reg->subrgn_disable = 0x0; |
| 120 | rgn_attr_reg->sp = (i == 3) ? 0xC : 0x0; |
| 121 | rgn_map_reg->rgn_size = __builtin_ffs(region_size) - 2; |
| 122 | rgn_map_reg->rgn_en = 0x1; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | /******************************************************************************* |
| 127 | * Initialize the secure environment. |
| 128 | ******************************************************************************/ |
| 129 | void plat_security_setup(void) |
| 130 | { |
| 131 | sec_protect(DRAM_SEC_BASE, DRAM_SEC_SIZE); |
| 132 | } |