67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
/*
|
|
* QEMU AVR CPU
|
|
*
|
|
* Copyright (c) 2016-2020 Michael Rolnik
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see
|
|
* <http://www.gnu.org/licenses/lgpl-2.1.html>
|
|
*/
|
|
|
|
#ifndef QEMU_AVR_CPU_H
|
|
#define QEMU_AVR_CPU_H
|
|
|
|
#include "exec/cpu-defs.h"
|
|
|
|
#define TCG_GUEST_DEFAULT_MO 0
|
|
|
|
/*
|
|
* AVR has two memory spaces, data & code.
|
|
* e.g. both have 0 address
|
|
* ST/LD instructions access data space
|
|
* LPM/SPM and instruction fetching access code memory space
|
|
*/
|
|
#define MMU_CODE_IDX 0
|
|
#define MMU_DATA_IDX 1
|
|
|
|
#define EXCP_RESET 1
|
|
#define EXCP_INT(n) (EXCP_RESET + (n) + 1)
|
|
|
|
/* Number of CPU registers */
|
|
#define NUMBER_OF_CPU_REGISTERS 32
|
|
/* Number of IO registers accessible by ld/st/in/out */
|
|
#define NUMBER_OF_IO_REGISTERS 64
|
|
|
|
/*
|
|
* Offsets of AVR memory regions in host memory space.
|
|
*
|
|
* This is needed because the AVR has separate code and data address
|
|
* spaces that both have start from zero but have to go somewhere in
|
|
* host memory.
|
|
*
|
|
* It's also useful to know where some things are, like the IO registers.
|
|
*/
|
|
/* Flash program memory */
|
|
#define OFFSET_CODE 0x00000000
|
|
/* CPU registers, IO registers, and SRAM */
|
|
#define OFFSET_DATA 0x00800000
|
|
/* CPU registers specifically, these are mapped at the start of data */
|
|
#define OFFSET_CPU_REGISTERS OFFSET_DATA
|
|
/*
|
|
* IO registers, including status register, stack pointer, and memory
|
|
* mapped peripherals, mapped just after CPU registers
|
|
*/
|
|
#define OFFSET_IO_REGISTERS (OFFSET_DATA + NUMBER_OF_CPU_REGISTERS)
|
|
|
|
#endif /* !defined (QEMU_AVR_CPU_H) */
|