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Diffstat (limited to 'include/export/common/ep_info_exp.h')
| -rw-r--r-- | include/export/common/ep_info_exp.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/include/export/common/ep_info_exp.h b/include/export/common/ep_info_exp.h new file mode 100644 index 00000000..4c703e6d --- /dev/null +++ b/include/export/common/ep_info_exp.h @@ -0,0 +1,107 @@ +/* + * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef ARM_TRUSTED_FIRMWARE_EXPORT_COMMON_EP_INFO_EXP_H +#define ARM_TRUSTED_FIRMWARE_EXPORT_COMMON_EP_INFO_EXP_H + +/* EXPORT HEADER -- See include/export/README for details! -- EXPORT HEADER */ + +#include "../lib/utils_def_exp.h" +#include "param_header_exp.h" + +/******************************************************************************* + * Constants that allow assembler code to access members of and the + * 'entry_point_info' structure at their correct offsets. + ******************************************************************************/ +#define ENTRY_POINT_INFO_PC_OFFSET U(0x08) +#ifdef __aarch64__ +#define ENTRY_POINT_INFO_ARGS_OFFSET U(0x18) +#else +#define ENTRY_POINT_INFO_LR_SVC_OFFSET U(0x10) +#define ENTRY_POINT_INFO_ARGS_OFFSET U(0x14) +#endif + +/* Security state of the image. */ +#define EP_SECURITY_MASK U(0x1) +#define EP_SECURITY_SHIFT U(0) +#define EP_SECURE U(0x0) +#define EP_NON_SECURE U(0x1) + +/* Endianness of the image. */ +#define EP_EE_MASK U(0x2) +#define EP_EE_SHIFT U(1) +#define EP_EE_LITTLE U(0x0) +#define EP_EE_BIG U(0x2) +#define EP_GET_EE(x) ((x) & EP_EE_MASK) +#define EP_SET_EE(x, ee) ((x) = ((x) & ~EP_EE_MASK) | (ee)) + +/* Enable or disable access to the secure timer from secure images. */ +#define EP_ST_MASK U(0x4) +#define EP_ST_SHIFT U(2) +#define EP_ST_DISABLE U(0x0) +#define EP_ST_ENABLE U(0x4) +#define EP_GET_ST(x) ((x) & EP_ST_MASK) +#define EP_SET_ST(x, ee) ((x) = ((x) & ~EP_ST_MASK) | (ee)) + +/* Determine if an image is executable or not. */ +#define EP_EXE_MASK U(0x8) +#define EP_EXE_SHIFT U(3) +#define EP_NON_EXECUTABLE U(0x0) +#define EP_EXECUTABLE U(0x8) +#define EP_GET_EXE(x) ((x) & EP_EXE_MASK) +#define EP_SET_EXE(x, ee) ((x) = ((x) & ~EP_EXE_MASK) | (ee)) + +/* Flag to indicate the first image that is executed. */ +#define EP_FIRST_EXE_MASK U(0x10) +#define EP_FIRST_EXE_SHIFT U(4) +#define EP_FIRST_EXE U(0x10) +#define EP_GET_FIRST_EXE(x) ((x) & EP_FIRST_EXE_MASK) +#define EP_SET_FIRST_EXE(x, ee) ((x) = ((x) & ~EP_FIRST_EXE_MASK) | (ee)) + +#ifndef __ASSEMBLER__ + +typedef struct aapcs64_params { + uint64_t arg0; + uint64_t arg1; + uint64_t arg2; + uint64_t arg3; + uint64_t arg4; + uint64_t arg5; + uint64_t arg6; + uint64_t arg7; +} aapcs64_params_t; + +typedef struct aapcs32_params { + uint32_t arg0; + uint32_t arg1; + uint32_t arg2; + uint32_t arg3; +} aapcs32_params_t; + +/***************************************************************************** + * This structure represents the superset of information needed while + * switching exception levels. The only two mechanisms to do so are + * ERET & SMC. Security state is indicated using bit zero of header + * attribute + * NOTE: BL1 expects entrypoint followed by spsr at an offset from the start + * of this structure defined by the macro `ENTRY_POINT_INFO_PC_OFFSET` while + * processing SMC to jump to BL31. + *****************************************************************************/ +typedef struct entry_point_info { + param_header_t h; + uintptr_t pc; + uint32_t spsr; +#ifdef __aarch64__ + aapcs64_params_t args; +#else + uintptr_t lr_svc; + aapcs32_params_t args; +#endif +} entry_point_info_t; + +#endif /*__ASSEMBLER__*/ + +#endif /* ARM_TRUSTED_FIRMWARE_EXPORT_COMMON_EP_INFO_EXP_H */ |