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/** @file
Transfer protocol definitions used by debug agent and host. It is only
intended to be used by Debug related module implementation.
Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __TRANSFER_PROTOCOL_H__
#define __TRANSFER_PROTOCOL_H__
#include "ProcessorContext.h"
//
// Current revision of transfer protocol
// 0.4: Packet compression and decompression.
//
#define DEBUG_AGENT_REVISION_03 ((0 << 16) | 03)
#define DEBUG_AGENT_REVISION_04 ((0 << 16) | 04)
#define DEBUG_AGENT_CAPABILITIES 0
//
// Definitions for the (A)ttach command
//
#define DEBUG_STARTING_SYMBOL_ATTACH (0xFA)
//
// Definition for starting symbol of a normal debug packet. Choose a non-ASCII to avoid conflict with other serial output.
//
#define DEBUG_STARTING_SYMBOL_NORMAL (0xFE)
//
// Definition for starting symbol of a (C)ompressed debug packet. Choose a non-ASCII to avoid conflict with other serial output.
//
#define DEBUG_STARTING_SYMBOL_COMPRESS (0xFC)
#pragma pack(1)
//
// Definition for debug packet header for debug packets (not including attach command)
//
typedef struct {
UINT8 StartSymbol;
UINT8 Command;
UINT8 Length; // Length of Debug Packet including header and payload in byte
UINT8 SequenceNo;
UINT16 Crc;
} DEBUG_PACKET_HEADER;
//
// Definition for Command field for debug packets
//
#define DEBUG_COMMAND_REQUEST (0 << 7)
#define DEBUG_COMMAND_RESPONSE (1 << 7)
#define IS_REQUEST(x) (((x)->Command & DEBUG_COMMAND_RESPONSE) == 0)
//
// HOST initiated commands
//
#define DEBUG_COMMAND_RESET (DEBUG_COMMAND_REQUEST | 0x00)
#define DEBUG_COMMAND_GO (DEBUG_COMMAND_REQUEST | 0x01)
#define DEBUG_COMMAND_BREAK_CAUSE (DEBUG_COMMAND_REQUEST | 0x02)
#define DEBUG_COMMAND_SET_HW_BREAKPOINT (DEBUG_COMMAND_REQUEST | 0x03)
#define DEBUG_COMMAND_CLEAR_HW_BREAKPOINT (DEBUG_COMMAND_REQUEST | 0x04)
#define DEBUG_COMMAND_SINGLE_STEPPING (DEBUG_COMMAND_REQUEST | 0x05)
#define DEBUG_COMMAND_SET_SW_BREAKPOINT (DEBUG_COMMAND_REQUEST | 0x06)
#define DEBUG_COMMAND_READ_MEMORY (DEBUG_COMMAND_REQUEST | 0x07)
#define DEBUG_COMMAND_WRITE_MEMORY (DEBUG_COMMAND_REQUEST | 0x08)
#define DEBUG_COMMAND_READ_IO (DEBUG_COMMAND_REQUEST | 0x09)
#define DEBUG_COMMAND_WRITE_IO (DEBUG_COMMAND_REQUEST | 0x0A)
#define DEBUG_COMMAND_READ_REGISTER (DEBUG_COMMAND_REQUEST | 0x0B)
#define DEBUG_COMMAND_WRITE_REGISTER (DEBUG_COMMAND_REQUEST | 0x0C)
#define DEBUG_COMMAND_READ_ALL_REGISTERS (DEBUG_COMMAND_REQUEST | 0x0D)
#define DEBUG_COMMAND_ARCH_MODE (DEBUG_COMMAND_REQUEST | 0x0E)
#define DEBUG_COMMAND_READ_MSR (DEBUG_COMMAND_REQUEST | 0x0F)
#define DEBUG_COMMAND_WRITE_MSR (DEBUG_COMMAND_REQUEST | 0x10)
#define DEBUG_COMMAND_SET_DEBUG_SETTING (DEBUG_COMMAND_REQUEST | 0x11)
#define DEBUG_COMMAND_GET_REVISION (DEBUG_COMMAND_REQUEST | 0x12)
#define DEBUG_COMMAND_GET_EXCEPTION (DEBUG_COMMAND_REQUEST | 0x13)
#define DEBUG_COMMAND_SET_VIEWPOINT (DEBUG_COMMAND_REQUEST | 0x14)
#define DEBUG_COMMAND_GET_VIEWPOINT (DEBUG_COMMAND_REQUEST | 0x15)
#define DEBUG_COMMAND_DETACH (DEBUG_COMMAND_REQUEST | 0x16)
#define DEBUG_COMMAND_CPUID (DEBUG_COMMAND_REQUEST | 0x17)
#define DEBUG_COMMAND_SEARCH_SIGNATURE (DEBUG_COMMAND_REQUEST | 0x18)
#define DEBUG_COMMAND_HALT (DEBUG_COMMAND_REQUEST | 0x19)
//
// TARGET initiated commands
//
#define DEBUG_COMMAND_INIT_BREAK (DEBUG_COMMAND_REQUEST | 0x3F)
#define DEBUG_COMMAND_BREAK_POINT (DEBUG_COMMAND_REQUEST | 0x3E)
#define DEBUG_COMMAND_MEMORY_READY (DEBUG_COMMAND_REQUEST | 0x3D)
#define DEBUG_COMMAND_PRINT_MESSAGE (DEBUG_COMMAND_REQUEST | 0x3C)
#define DEBUG_COMMAND_ATTACH_BREAK (DEBUG_COMMAND_REQUEST | 0x3B)
//
// Response commands
//
#define DEBUG_COMMAND_OK (DEBUG_COMMAND_RESPONSE | 0x00)
#define DEBUG_COMMAND_RESEND (DEBUG_COMMAND_RESPONSE | 0x01)
#define DEBUG_COMMAND_ABORT (DEBUG_COMMAND_RESPONSE | 0x02)
//
// The below 2 commands are used when transferring big data (like > ~250 bytes).
// The sequence is:
// HOST TARGET
// Request =>
// <= IN_PROGRESS with partial data
// CONTINUE =>
// (could have multiple IN_PROGRESS and CONTINUE interactions)
// <= OK with the last part of data
// OK (no data as ACK) =>
//
#define DEBUG_COMMAND_IN_PROGRESS (DEBUG_COMMAND_RESPONSE | 0x03)
#define DEBUG_COMMAND_CONTINUE (DEBUG_COMMAND_RESPONSE | 0x04)
//
// The below 2 commands are used to support deferred halt:
// TARGET returns HALT_DEFERRED when it receives a HALT request in inter-active mode.
// TARGET returns HALT_PROCESSED when it receives a GO request and has a pending HALT request.
//
#define DEBUG_COMMAND_HALT_DEFERRED (DEBUG_COMMAND_RESPONSE | 0x05)
#define DEBUG_COMMAND_HALT_PROCESSED (DEBUG_COMMAND_RESPONSE | 0x06)
#define DEBUG_COMMAND_TIMEOUT (DEBUG_COMMAND_RESPONSE | 0x07)
#define DEBUG_COMMAND_NOT_SUPPORTED (DEBUG_COMMAND_RESPONSE | 0x0F)
//
// Definition for data field for debug packets
//
#define DEBUG_DATA_UPPER_LIMIT 0xff // Upper limit for the data size, by the limit of the packet header definition.
#define DEBUG_DATA_MAXIMUM_REAL_DATA (DEBUG_DATA_UPPER_LIMIT - sizeof (DEBUG_PACKET_HEADER))
//
// Response data for DEBUG_COMMAND_BREAK_CAUSE
//
typedef struct {
UINT8 Cause;
UINT64 StopAddress;
} DEBUG_DATA_RESPONSE_BREAK_CAUSE;
//
// Break type definitions for DEBUG_DATA_BREAK_CAUSE
//
#define DEBUG_DATA_BREAK_CAUSE_UNKNOWN 0
#define DEBUG_DATA_BREAK_CAUSE_HW_BREAKPOINT 1
#define DEBUG_DATA_BREAK_CAUSE_STEPPING 2
#define DEBUG_DATA_BREAK_CAUSE_SW_BREAKPOINT 3
#define DEBUG_DATA_BREAK_CAUSE_USER_HALT 4
#define DEBUG_DATA_BREAK_CAUSE_IMAGE_LOAD 5
#define DEBUG_DATA_BREAK_CAUSE_IMAGE_UNLOAD 6
#define DEBUG_DATA_BREAK_CAUSE_SYSTEM_RESET 7
#define DEBUG_DATA_BREAK_CAUSE_EXCEPTION 8
#define DEBUG_DATA_BREAK_CAUSE_MEMORY_READY 9
//
// Response data for DEBUG_COMMAND_ARCH_MODE, defined as SOFT_DEBUGGER_PROCESSOR_...
//
typedef struct {
UINT8 CpuMode;
} DEBUG_DATA_RESPONSE_ARCH_MODE;
//
// Cpu architecture definitions for DEBUG_DATA_RESPONSE_ARCH_MODE
//
#define DEBUG_DATA_BREAK_CPU_ARCH_IA16 0
#define DEBUG_DATA_BREAK_CPU_ARCH_IA32 1
#define DEBUG_DATA_BREAK_CPU_ARCH_X64 2
typedef struct {
UINT8 Length:2; // Refer to below DEBUG_DATA_BREAKPOINT_LENGTH_XX macros
UINT8 Access:2; // Refer to below DEBUG_DATA_BREAKPOINT_ACCESS_XX macros
UINT8 Index:2; // Index of debug register
UINT8 Reserved:2;
} DEBUG_DATA_BREAKPOINT_TYPE;
#define DEBUG_DATA_BREAKPOINT_MEMORY_ACCESS (0x3)
#define DEBUG_DATA_BREAKPOINT_IO_ACCESS (0x2)
#define DEBUG_DATA_BREAKPOINT_MEMORY_WRITE (0x1)
#define DEBUG_DATA_BREAKPOINT_MEMORY_EXECUTE (0x0)
#define DEBUG_DATA_BREAKPOINT_LENGTH_32 (0x3)
#define DEBUG_DATA_BREAKPOINT_LENGTH_64 (0x2)
#define DEBUG_DATA_BREAKPOINT_LENGTH_16 (0x1)
#define DEBUG_DATA_BREAKPOINT_LENGTH_8 (0x0)
//
// Request data for DEBUG_COMMAND_SET_HW_BREAKPOINT
//
typedef struct {
DEBUG_DATA_BREAKPOINT_TYPE Type;
UINT64 Address;
} DEBUG_DATA_SET_HW_BREAKPOINT;
//
// Request data for DEBUG_COMMAND_CLEAR_HW_BREAKPOINT
//
typedef struct {
UINT8 IndexMask; // 0x0f will clear all hw breakpoints
} DEBUG_DATA_CLEAR_HW_BREAKPOINT;
//
// Request and response data for DEBUG_COMMAND_SET_SW_BREAKPOINT
//
typedef struct {
UINT64 Address;
} DEBUG_DATA_SET_SW_BREAKPOINT;
typedef struct {
UINT8 OriginalData;
} DEBUG_DATA_RESPONSE_SET_SW_BREAKPOINT;
//
// Request data for DEBUG_COMMAND_READ_MEMORY
//
typedef struct {
UINT64 Address;
UINT8 Width;
UINT16 Count;
} DEBUG_DATA_READ_MEMORY;
//
// Request data for DEBUG_COMMAND_WRITE_MEMORY
//
typedef struct {
UINT64 Address;
UINT8 Width;
UINT16 Count;
UINT8 Data[1]; // The actual length is (Width * Count)
} DEBUG_DATA_WRITE_MEMORY;
//
// Request and response data for DEBUG_COMMAND_READ_IO
//
typedef struct {
UINT64 Port;
UINT8 Width;
} DEBUG_DATA_READ_IO;
typedef struct {
UINT8 Data[1]; // The actual length depends on the packet header
} DEBUG_DATA_RESPONSE_READ_IO;
//
// Request data for DEBUG_COMMAND_WRITE_IO
//
typedef struct {
UINT64 Port;
UINT8 Width;
UINT8 Data[1]; // The actual length is Width
} DEBUG_DATA_WRITE_IO;
//
// Request data for DEBUG_COMMAND_READ_REGISTER
//
typedef struct {
UINT8 Index; // defined as SOFT_DEBUGGER_REGISTER_XX
} DEBUG_DATA_READ_REGISTER;
//
// Request data for DEBUG_COMMAND_WRITE_REGISTER
//
typedef struct {
UINT8 Index; // defined as SOFT_DEBUGGER_REGISTER_XX
UINT8 Length;
UINT8 Data[1]; // The actual length is Length
} DEBUG_DATA_WRITE_REGISTER;
//
// Request and response data for DEBUG_COMMAND_READ_MSR
//
typedef struct {
UINT32 Index;
} DEBUG_DATA_READ_MSR;
typedef struct {
UINT64 Value;
} DEBUG_DATA_RESPONSE_READ_MSR;
//
// Request data for DEBUG_COMMAND_WRITE_MSR
//
typedef struct {
UINT32 Index;
UINT64 Value;
} DEBUG_DATA_WRITE_MSR;
//
// Response data for DEBUG_COMMAND_GET_REVISION
//
typedef struct {
UINT32 Revision;
UINT32 Capabilities;
} DEBUG_DATA_RESPONSE_GET_REVISION;
//
// Response data for DEBUG_COMMAND_GET_EXCEPTION
//
typedef struct {
UINT8 ExceptionNum;
UINT32 ExceptionData;
} DEBUG_DATA_RESPONSE_GET_EXCEPTION;
//
// Request data for DEBUG_DATA_SET_DEBUG_SETTING
//
typedef struct {
UINT8 Key;
UINT8 Value;
} DEBUG_DATA_SET_DEBUG_SETTING;
//
// Supported keys
//
#define DEBUG_AGENT_SETTING_SMM_ENTRY_BREAK 1
#define DEBUG_AGENT_SETTING_PRINT_ERROR_LEVEL 2
#define DEBUG_AGENT_SETTING_BOOT_SCRIPT_ENTRY_BREAK 3
//
// Bitmask of print error level for debug message
//
#define DEBUG_AGENT_ERROR BIT0
#define DEBUG_AGENT_WARNING BIT1
#define DEBUG_AGENT_INFO BIT2
#define DEBUG_AGENT_VERBOSE BIT3
//
// Request data for DEBUG_COMMAND_SET_VIEWPOINT
//
typedef struct {
UINT32 ViewPoint; // The index of viewpoint will be set
} DEBUG_DATA_SET_VIEWPOINT;
//
// Response data for DEBUG_COMMAND_GET_VIEWPOINT
//
typedef struct {
UINT32 ViewPoint; // The index of viewpoint will be returned
} DEBUG_DATA_RESPONSE_GET_VIEWPOINT;
//
// Request and response data for DEBUG_COMMAND_CPUID
//
typedef struct {
UINT32 Eax; // The value of EAX prior to invoking the CPUID instruction
UINT32 Ecx; // The value of ECX prior to invoking the CPUID instruction
} DEBUG_DATA_CPUID;
typedef struct {
UINT32 Eax; // The value of EAX returned by the CPUID instruction
UINT32 Ebx; // The value of EBX returned by the CPUID instruction
UINT32 Ecx; // The value of ECX returned by the CPUID instruction
UINT32 Edx; // The value of EDX returned by the CPUID instruction
} DEBUG_DATA_RESPONSE_CPUID;
//
// Request and response data for DEBUG_COMMAND_SEARCH_SIGNATURE
//
typedef struct {
UINT64 Start;
UINT32 Count;
UINT32 Alignment;
BOOLEAN Positive; // TRUE to search in higher address memory
UINT8 DataLength;
UINT8 Data[1];
} DEBUG_DATA_SEARCH_SIGNATURE;
typedef struct {
UINT64 Address; // -1 indicates not found
} DEBUG_DATA_RESPONSE_SEARCH_SIGNATURE;
#pragma pack()
#endif
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