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309 lines
9.7 KiB
C
309 lines
9.7 KiB
C
/** @file
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Describes the protocol interface to the EBC interpreter.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __EFI_EBC_PROTOCOL_H__
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#define __EFI_EBC_PROTOCOL_H__
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#define EFI_EBC_INTERPRETER_PROTOCOL_GUID \
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{ \
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0x13AC6DD1, 0x73D0, 0x11D4, {0xB0, 0x6B, 0x00, 0xAA, 0x00, 0xBD, 0x6D, 0xE7 } \
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}
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//
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// Define OPCODES
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//
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#define OPCODE_BREAK 0x00
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#define OPCODE_JMP 0x01
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#define OPCODE_JMP8 0x02
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#define OPCODE_CALL 0x03
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#define OPCODE_RET 0x04
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#define OPCODE_CMPEQ 0x05
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#define OPCODE_CMPLTE 0x06
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#define OPCODE_CMPGTE 0x07
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#define OPCODE_CMPULTE 0x08
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#define OPCODE_CMPUGTE 0x09
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#define OPCODE_NOT 0x0A
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#define OPCODE_NEG 0x0B
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#define OPCODE_ADD 0x0C
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#define OPCODE_SUB 0x0D
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#define OPCODE_MUL 0x0E
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#define OPCODE_MULU 0x0F
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#define OPCODE_DIV 0x10
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#define OPCODE_DIVU 0x11
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#define OPCODE_MOD 0x12
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#define OPCODE_MODU 0x13
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#define OPCODE_AND 0x14
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#define OPCODE_OR 0x15
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#define OPCODE_XOR 0x16
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#define OPCODE_SHL 0x17
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#define OPCODE_SHR 0x18
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#define OPCODE_ASHR 0x19
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#define OPCODE_EXTNDB 0x1A
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#define OPCODE_EXTNDW 0x1B
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#define OPCODE_EXTNDD 0x1C
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#define OPCODE_MOVBW 0x1D
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#define OPCODE_MOVWW 0x1E
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#define OPCODE_MOVDW 0x1F
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#define OPCODE_MOVQW 0x20
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#define OPCODE_MOVBD 0x21
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#define OPCODE_MOVWD 0x22
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#define OPCODE_MOVDD 0x23
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#define OPCODE_MOVQD 0x24
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#define OPCODE_MOVSNW 0x25 // Move signed natural with word index
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#define OPCODE_MOVSND 0x26 // Move signed natural with dword index
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//
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// #define OPCODE_27 0x27
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//
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#define OPCODE_MOVQQ 0x28 // Does this go away?
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#define OPCODE_LOADSP 0x29
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#define OPCODE_STORESP 0x2A
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#define OPCODE_PUSH 0x2B
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#define OPCODE_POP 0x2C
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#define OPCODE_CMPIEQ 0x2D
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#define OPCODE_CMPILTE 0x2E
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#define OPCODE_CMPIGTE 0x2F
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#define OPCODE_CMPIULTE 0x30
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#define OPCODE_CMPIUGTE 0x31
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#define OPCODE_MOVNW 0x32
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#define OPCODE_MOVND 0x33
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//
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// #define OPCODE_34 0x34
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//
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#define OPCODE_PUSHN 0x35
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#define OPCODE_POPN 0x36
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#define OPCODE_MOVI 0x37
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#define OPCODE_MOVIN 0x38
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#define OPCODE_MOVREL 0x39
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//
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// Bit masks for opcode encodings
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//
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#define OPCODE_M_OPCODE 0x3F // bits of interest for first level decode
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#define OPCODE_M_IMMDATA 0x80
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#define OPCODE_M_IMMDATA64 0x40
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#define OPCODE_M_64BIT 0x40 // for CMP
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#define OPCODE_M_RELADDR 0x10 // for CALL instruction
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#define OPCODE_M_CMPI32_DATA 0x80 // for CMPI
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#define OPCODE_M_CMPI64 0x40 // for CMPI 32 or 64 bit comparison
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#define OPERAND_M_MOVIN_N 0x80
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#define OPERAND_M_CMPI_INDEX 0x10
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//
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// Masks for instructions that encode presence of indexes for operand1 and/or
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// operand2.
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//
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#define OPCODE_M_IMMED_OP1 0x80
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#define OPCODE_M_IMMED_OP2 0x40
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//
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// Bit masks for operand encodings
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//
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#define OPERAND_M_INDIRECT1 0x08
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#define OPERAND_M_INDIRECT2 0x80
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#define OPERAND_M_OP1 0x07
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#define OPERAND_M_OP2 0x70
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//
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// Masks for data manipulation instructions
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//
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#define DATAMANIP_M_64 0x40 // 64-bit width operation
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#define DATAMANIP_M_IMMDATA 0x80
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//
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// For MOV instructions, need a mask for the opcode when immediate
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// data applies to R2.
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//
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#define OPCODE_M_IMMED_OP2 0x40
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//
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// The MOVI/MOVIn instructions use bit 6 of operands byte to indicate
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// if an index is present. Then bits 4 and 5 are used to indicate the width
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// of the move.
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//
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#define MOVI_M_IMMDATA 0x40
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#define MOVI_M_DATAWIDTH 0xC0
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#define MOVI_DATAWIDTH16 0x40
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#define MOVI_DATAWIDTH32 0x80
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#define MOVI_DATAWIDTH64 0xC0
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#define MOVI_M_MOVEWIDTH 0x30
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#define MOVI_MOVEWIDTH8 0x00
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#define MOVI_MOVEWIDTH16 0x10
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#define MOVI_MOVEWIDTH32 0x20
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#define MOVI_MOVEWIDTH64 0x30
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//
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// Masks for CALL instruction encodings
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//
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#define OPERAND_M_RELATIVE_ADDR 0x10
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#define OPERAND_M_NATIVE_CALL 0x20
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//
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// Masks for decoding push/pop instructions
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//
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#define PUSHPOP_M_IMMDATA 0x80 // opcode bit indicating immediate data
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#define PUSHPOP_M_64 0x40 // opcode bit indicating 64-bit operation
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//
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// Mask for operand of JMP instruction
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//
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#define JMP_M_RELATIVE 0x10
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#define JMP_M_CONDITIONAL 0x80
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#define JMP_M_CS 0x40
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//
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// Macros to determine if a given operand is indirect
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//
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#define OPERAND1_INDIRECT(op) ((op) & OPERAND_M_INDIRECT1)
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#define OPERAND2_INDIRECT(op) ((op) & OPERAND_M_INDIRECT2)
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//
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// Macros to extract the operands from second byte of instructions
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//
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#define OPERAND1_REGNUM(op) ((op) & OPERAND_M_OP1)
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#define OPERAND2_REGNUM(op) (((op) & OPERAND_M_OP2) >> 4)
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#define OPERAND1_CHAR(op) ('0' + OPERAND1_REGNUM (op))
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#define OPERAND2_CHAR(op) ('0' + OPERAND2_REGNUM (op))
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//
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// Condition masks usually for byte 1 encodings of code
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//
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#define CONDITION_M_CONDITIONAL 0x80
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#define CONDITION_M_CS 0x40
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///
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/// Protocol Guid Name defined in spec.
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///
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#define EFI_EBC_PROTOCOL_GUID EFI_EBC_INTERPRETER_PROTOCOL_GUID
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///
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/// Define for forward reference.
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///
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typedef struct _EFI_EBC_PROTOCOL EFI_EBC_PROTOCOL;
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/**
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Creates a thunk for an EBC entry point, returning the address of the thunk.
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A PE32+ EBC image, like any other PE32+ image, contains an optional header that specifies the
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entry point for image execution. However, for EBC images, this is the entry point of EBC
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instructions, so is not directly executable by the native processor. Therefore, when an EBC image is
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loaded, the loader must call this service to get a pointer to native code (thunk) that can be executed,
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which will invoke the interpreter to begin execution at the original EBC entry point.
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@param This A pointer to the EFI_EBC_PROTOCOL instance.
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@param ImageHandle Handle of image for which the thunk is being created.
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@param EbcEntryPoint Address of the actual EBC entry point or protocol service the thunk should call.
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@param Thunk Returned pointer to a thunk created.
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@retval EFI_SUCCESS The function completed successfully.
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@retval EFI_INVALID_PARAMETER Image entry point is not 2-byte aligned.
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@retval EFI_OUT_OF_RESOURCES Memory could not be allocated for the thunk.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_EBC_CREATE_THUNK)(
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IN EFI_EBC_PROTOCOL *This,
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IN EFI_HANDLE ImageHandle,
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IN VOID *EbcEntryPoint,
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OUT VOID **Thunk
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);
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/**
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Called prior to unloading an EBC image from memory.
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This function is called after an EBC image has exited, but before the image is actually unloaded. It
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is intended to provide the interpreter with the opportunity to perform any cleanup that may be
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necessary as a result of loading and executing the image.
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@param This A pointer to the EFI_EBC_PROTOCOL instance.
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@param ImageHandle Image handle of the EBC image that is being unloaded from memory.
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@retval EFI_SUCCESS The function completed successfully.
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@retval EFI_INVALID_PARAMETER Image handle is not recognized as belonging
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to an EBC image that has been executed.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_EBC_UNLOAD_IMAGE)(
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IN EFI_EBC_PROTOCOL *This,
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IN EFI_HANDLE ImageHandle
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);
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/**
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This is the prototype for the Flush callback routine. A pointer to a routine
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of this type is passed to the EBC EFI_EBC_REGISTER_ICACHE_FLUSH protocol service.
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@param Start The beginning physical address to flush from the processor's instruction cache.
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@param Length The number of bytes to flush from the processor's instruction cache.
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@retval EFI_SUCCESS The function completed successfully.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EBC_ICACHE_FLUSH)(
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IN EFI_PHYSICAL_ADDRESS Start,
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IN UINT64 Length
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);
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/**
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Registers a callback function that the EBC interpreter calls to flush
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the processor instruction cache following creation of thunks.
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@param This A pointer to the EFI_EBC_PROTOCOL instance.
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@param Flush Pointer to a function of type EBC_ICACH_FLUSH.
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@retval EFI_SUCCESS The function completed successfully.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_EBC_REGISTER_ICACHE_FLUSH)(
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IN EFI_EBC_PROTOCOL *This,
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IN EBC_ICACHE_FLUSH Flush
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);
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/**
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Called to get the version of the interpreter.
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This function is called to get the version of the loaded EBC interpreter. The value and format of the
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returned version is identical to that returned by the EBC BREAK 1 instruction.
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@param This A pointer to the EFI_EBC_PROTOCOL instance.
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@param Version Pointer to where to store the returned version of the interpreter.
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@retval EFI_SUCCESS The function completed successfully.
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@retval EFI_INVALID_PARAMETER Version pointer is NULL.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_EBC_GET_VERSION)(
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IN EFI_EBC_PROTOCOL *This,
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IN OUT UINT64 *Version
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);
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///
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/// The EFI EBC protocol provides services to load and execute EBC images, which will typically be
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/// loaded into option ROMs. The image loader will load the EBC image, perform standard relocations,
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/// and invoke the CreateThunk() service to create a thunk for the EBC image's entry point. The
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/// image can then be run using the standard EFI start image services.
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///
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struct _EFI_EBC_PROTOCOL {
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EFI_EBC_CREATE_THUNK CreateThunk;
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EFI_EBC_UNLOAD_IMAGE UnloadImage;
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EFI_EBC_REGISTER_ICACHE_FLUSH RegisterICacheFlush;
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EFI_EBC_GET_VERSION GetVersion;
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};
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//
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// Extern the global EBC protocol GUID
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//
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extern EFI_GUID gEfiEbcProtocolGuid;
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#endif
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