Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
dp-arm | fa3cf0b | 2017-05-03 09:38:09 +0100 | [diff] [blame] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #ifndef __EP_INFO_H__ |
| 8 | #define __EP_INFO_H__ |
| 9 | |
| 10 | #include <param_header.h> |
Varun Wadekar | c6a11f6 | 2017-05-25 18:04:48 -0700 | [diff] [blame] | 11 | #include <utils_def.h> |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 12 | |
Varun Wadekar | c6a11f6 | 2017-05-25 18:04:48 -0700 | [diff] [blame] | 13 | #define SECURE U(0x0) |
| 14 | #define NON_SECURE U(0x1) |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 15 | #define sec_state_is_valid(s) (((s) == SECURE) || ((s) == NON_SECURE)) |
| 16 | |
| 17 | /******************************************************************************* |
| 18 | * Constants that allow assembler code to access members of and the |
| 19 | * 'entry_point_info' structure at their correct offsets. |
| 20 | ******************************************************************************/ |
Varun Wadekar | c6a11f6 | 2017-05-25 18:04:48 -0700 | [diff] [blame] | 21 | #define ENTRY_POINT_INFO_PC_OFFSET U(0x08) |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 22 | #ifdef AARCH32 |
Varun Wadekar | c6a11f6 | 2017-05-25 18:04:48 -0700 | [diff] [blame] | 23 | #define ENTRY_POINT_INFO_ARGS_OFFSET U(0x10) |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 24 | #else |
Varun Wadekar | c6a11f6 | 2017-05-25 18:04:48 -0700 | [diff] [blame] | 25 | #define ENTRY_POINT_INFO_ARGS_OFFSET U(0x18) |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 26 | #endif |
| 27 | |
| 28 | /* The following are used to set/get image attributes. */ |
Varun Wadekar | c6a11f6 | 2017-05-25 18:04:48 -0700 | [diff] [blame] | 29 | #define PARAM_EP_SECURITY_MASK U(0x1) |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 30 | |
| 31 | #define GET_SECURITY_STATE(x) (x & PARAM_EP_SECURITY_MASK) |
| 32 | #define SET_SECURITY_STATE(x, security) \ |
| 33 | ((x) = ((x) & ~PARAM_EP_SECURITY_MASK) | (security)) |
| 34 | |
Varun Wadekar | c6a11f6 | 2017-05-25 18:04:48 -0700 | [diff] [blame] | 35 | #define EP_EE_MASK U(0x2) |
| 36 | #define EP_EE_LITTLE U(0x0) |
| 37 | #define EP_EE_BIG U(0x2) |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 38 | #define EP_GET_EE(x) (x & EP_EE_MASK) |
| 39 | #define EP_SET_EE(x, ee) ((x) = ((x) & ~EP_EE_MASK) | (ee)) |
| 40 | |
Varun Wadekar | c6a11f6 | 2017-05-25 18:04:48 -0700 | [diff] [blame] | 41 | #define EP_ST_MASK U(0x4) |
| 42 | #define EP_ST_DISABLE U(0x0) |
| 43 | #define EP_ST_ENABLE U(0x4) |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 44 | #define EP_GET_ST(x) (x & EP_ST_MASK) |
| 45 | #define EP_SET_ST(x, ee) ((x) = ((x) & ~EP_ST_MASK) | (ee)) |
| 46 | |
Varun Wadekar | c6a11f6 | 2017-05-25 18:04:48 -0700 | [diff] [blame] | 47 | #define EP_EXE_MASK U(0x8) |
| 48 | #define NON_EXECUTABLE U(0x0) |
| 49 | #define EXECUTABLE U(0x8) |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 50 | #define EP_GET_EXE(x) (x & EP_EXE_MASK) |
| 51 | #define EP_SET_EXE(x, ee) ((x) = ((x) & ~EP_EXE_MASK) | (ee)) |
| 52 | |
Varun Wadekar | c6a11f6 | 2017-05-25 18:04:48 -0700 | [diff] [blame] | 53 | #define EP_FIRST_EXE_MASK U(0x10) |
| 54 | #define EP_FIRST_EXE U(0x10) |
Soby Mathew | b911cc7 | 2017-02-13 12:46:28 +0000 | [diff] [blame] | 55 | #define EP_GET_FIRST_EXE(x) ((x) & EP_FIRST_EXE_MASK) |
| 56 | #define EP_SET_FIRST_EXE(x, ee) ((x) = ((x) & ~EP_FIRST_EXE_MASK) | (ee)) |
| 57 | |
| 58 | #ifndef __ASSEMBLY__ |
| 59 | |
| 60 | #include <cassert.h> |
| 61 | #include <types.h> |
| 62 | |
| 63 | typedef struct aapcs64_params { |
| 64 | u_register_t arg0; |
| 65 | u_register_t arg1; |
| 66 | u_register_t arg2; |
| 67 | u_register_t arg3; |
| 68 | u_register_t arg4; |
| 69 | u_register_t arg5; |
| 70 | u_register_t arg6; |
| 71 | u_register_t arg7; |
| 72 | } aapcs64_params_t; |
| 73 | |
| 74 | typedef struct aapcs32_params { |
| 75 | u_register_t arg0; |
| 76 | u_register_t arg1; |
| 77 | u_register_t arg2; |
| 78 | u_register_t arg3; |
| 79 | } aapcs32_params_t; |
| 80 | |
| 81 | /***************************************************************************** |
| 82 | * This structure represents the superset of information needed while |
| 83 | * switching exception levels. The only two mechanisms to do so are |
| 84 | * ERET & SMC. Security state is indicated using bit zero of header |
| 85 | * attribute |
| 86 | * NOTE: BL1 expects entrypoint followed by spsr at an offset from the start |
| 87 | * of this structure defined by the macro `ENTRY_POINT_INFO_PC_OFFSET` while |
| 88 | * processing SMC to jump to BL31. |
| 89 | *****************************************************************************/ |
| 90 | typedef struct entry_point_info { |
| 91 | param_header_t h; |
| 92 | uintptr_t pc; |
| 93 | uint32_t spsr; |
| 94 | #ifdef AARCH32 |
| 95 | aapcs32_params_t args; |
| 96 | #else |
| 97 | aapcs64_params_t args; |
| 98 | #endif |
| 99 | } entry_point_info_t; |
| 100 | |
| 101 | /* |
| 102 | * Compile time assertions related to the 'entry_point_info' structure to |
| 103 | * ensure that the assembler and the compiler view of the offsets of |
| 104 | * the structure members is the same. |
| 105 | */ |
| 106 | CASSERT(ENTRY_POINT_INFO_PC_OFFSET == |
| 107 | __builtin_offsetof(entry_point_info_t, pc), \ |
| 108 | assert_BL31_pc_offset_mismatch); |
| 109 | |
| 110 | CASSERT(ENTRY_POINT_INFO_ARGS_OFFSET == \ |
| 111 | __builtin_offsetof(entry_point_info_t, args), \ |
| 112 | assert_BL31_args_offset_mismatch); |
| 113 | |
| 114 | CASSERT(sizeof(uintptr_t) == |
| 115 | __builtin_offsetof(entry_point_info_t, spsr) - \ |
| 116 | __builtin_offsetof(entry_point_info_t, pc), \ |
| 117 | assert_entrypoint_and_spsr_should_be_adjacent); |
| 118 | |
| 119 | #endif /*__ASSEMBLY__*/ |
| 120 | |
| 121 | #endif /* __EP_INFO_H__ */ |
| 122 | |