/*    armio.c - I/O registers and interrupt controller.    ARMulator extensions for the ARM7100 family.    Copyright (C) 1999  Ben Williamson	Changes to support running uClinux/Atmel AT91 targets    Copyright (C) 2002  David McCullough <davidm@snapgear.com>    This program is free software; you can redistribute it and/or modify    it under the terms of the GNU General Public License as published by    the Free Software Foundation; either version 2 of the License, or    (at your option) any later version.    This program 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 General Public License for more details.    You should have received a copy of the GNU General Public License    along with this program; if not, write to the Free Software    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*/#include <sys/time.h>#include <sys/types.h>#include <unistd.h>#include "armdefs.h"/* *  7/17/2003     clean some routine. *                clean io_reset only to do special mach_io_reset function. *                wlm <wlm@student.dlut.edu.cn> *//* Reset IO.  * Now only reset some Internal IO Register. * Every machine has a reset routine to init it's special registers. * wlm 2003/7/17 * *//* some machine need less number. e.g. s3c2440 only need DIVISOR = 1 to boot*/#define DIVISOR      (50)static int prescale = DIVISOR;voidio_reset (ARMul_State * state){	struct device_desc *dev;	int i;	for (i = 0; i < skyeye_config.mach->dev_count; i++) {		dev = skyeye_config.mach->devices[i];		if (dev->reset)			dev->reset (dev);	}	if(skyeye_config.mach->mach_io_reset)		skyeye_config.mach->mach_io_reset (state);	else		fprintf(stderr,"SKYEYE_ERR:mach_io_reset is NULL\n");}voidio_do_cycle (ARMul_State * state){	struct device_desc *dev;	int i;//teawater add DBCT_TEST_SPEED 2005.10.04---------------------------------------#ifdef DBCT_TEST_SPEED	state->instr_count++;#endif	//DBCT_TEST_SPEED//AJ2D--------------------------------------------------------------------------	prescale--;	if (prescale < 0) {		prescale = DIVISOR;		for (i = 0; i < skyeye_config.mach->dev_count; i++) {			dev = skyeye_config.mach->devices[i];			if (dev->update)				dev->update (dev);		}		skyeye_config.mach->mach_io_do_cycle (state);	}}unsigned charmem_read_char (ARMul_State * state, ARMword addr){	union	{		unsigned char buf[4];		ARMword w;	} tmp;	tmp.w = mem_read_word (state, addr & ~0x3);	if (state->bigendSig == HIGH)		//if (big_endian)		return (tmp.buf[3 - (addr & 0x3)]);	return (tmp.buf[addr & 0x3]);}voidmem_write_char (ARMul_State * state, ARMword addr, unsigned char c){	union	{		unsigned char buf[4];		ARMword w;	} tmp;	tmp.w = mem_read_word (state, addr & ~0x3);	if (state->bigendSig == HIGH)	/*big enddian? */		//if (big_endian)		tmp.buf[3 - (addr & 0x3)] = c;	else		tmp.buf[addr & 0x3] = c;	mem_write_word (state, addr & ~0x3, tmp.w);}/* Internal registers from 0x80000000 to 0x80002000.   We also define a "debug I/O" register thereafter. */ARMwordio_read_byte (ARMul_State * state, ARMword addr){	struct device_desc *dev;	ARMword data;	int i;	for (i = 0; i < skyeye_config.mach->dev_count; i++) {		dev = skyeye_config.mach->devices[i];		if (!dev->read_byte)			continue;		/* if we specify size=0, we don't check 		 * whether "addr" is in the range of address space of device.		 * */		if (dev->size == 0) {			if (dev->read_byte (dev, addr, (u8 *) & data) !=			    ADDR_NOHIT)				return data & 0xff;		}		else if ((addr >= dev->base)			 && (addr < (dev->base + dev->size))) {			if (dev->read_byte (dev, addr, (u8 *) & data) !=			    ADDR_NOHIT)				return data & 0xff;		}	}	return skyeye_config.mach->mach_io_read_byte (state, addr);}ARMwordio_read_halfword (ARMul_State * state, ARMword addr){	struct device_desc *dev;	ARMword data;	int i;	for (i = 0; i < skyeye_config.mach->dev_count; i++) {		dev = skyeye_config.mach->devices[i];		if (!dev->read_halfword)			continue;		/* if we specify size=0, we don't check 		 * whether "addr" is in the range of address space of device.		 * */		if (dev->size == 0) {			if (dev->read_halfword (dev, addr, (u16 *) & data) !=			    ADDR_NOHIT)				return data & 0xffff;		}		else if ((addr >= dev->base)			 && (addr < (dev->base + dev->size))) {			if (dev->read_halfword (dev, addr, (u16 *) & data) !=			    ADDR_NOHIT)				return data & 0xffff;		}	}	return skyeye_config.mach->mach_io_read_halfword (state, addr);}ARMwordio_read_word (ARMul_State * state, ARMword addr){	struct device_desc *dev;	ARMword data;	int i;	for (i = 0; i < skyeye_config.mach->dev_count; i++) {		dev = skyeye_config.mach->devices[i];		if (!dev->read_word)			continue;		/* if we specify size=0, we don't check 		 * whether "addr" is in the range of address space of device.		 * */		if (dev->size == 0) {			if (dev->read_word (dev, addr, (u32 *) & data) !=			    ADDR_NOHIT)				return data;		}		else if ((addr >= dev->base)			 && (addr < (dev->base + dev->size))) {			if (dev->read_word (dev, addr, (u32 *) & data) !=			    ADDR_NOHIT)				return data;		}	}	return skyeye_config.mach->mach_io_read_word (state, addr);}voidio_write_byte (ARMul_State * state, ARMword addr, ARMword data){	struct device_desc *dev;	int i;	for (i = 0; i < skyeye_config.mach->dev_count; i++) {		dev = skyeye_config.mach->devices[i];		if (!dev->write_byte)			continue;		/* if we specify size=0, we don't check 		 * whether "addr" is in the range of address space of device.		 * */		if (dev->size == 0) {			if (dev->write_byte (dev, addr, (u8) data) !=			    ADDR_NOHIT)				return;		}		else if ((addr >= dev->base)			 && (addr < (dev->base + dev->size))) {			if (dev->write_byte (dev, addr, (u8) data) !=			    ADDR_NOHIT)				return;		}	}	skyeye_config.mach->mach_io_write_byte (state, addr, data);}voidio_write_halfword (ARMul_State * state, ARMword addr, ARMword data){	struct device_desc *dev;	int i;	for (i = 0; i < skyeye_config.mach->dev_count; i++) {		dev = skyeye_config.mach->devices[i];		if (!dev->write_halfword)			continue;		/* if we specify size=0, we don't check 		 * whether "addr" is in the range of address space of device.		 * */		if (dev->size == 0) {			if (dev->write_halfword (dev, addr, (u16) data) !=			    ADDR_NOHIT)				return;		}		else if ((addr >= dev->base)			 && (addr < (dev->base + dev->size))) {			if (dev->write_halfword (dev, addr, (u16) data) !=			    ADDR_NOHIT)				return;		}	}	skyeye_config.mach->mach_io_write_halfword (state, addr, data);}voidio_write_word (ARMul_State * state, ARMword addr, ARMword data){	struct device_desc *dev;	int i;	for (i = 0; i < skyeye_config.mach->dev_count; i++) {		dev = skyeye_config.mach->devices[i];		if (!dev->write_word)			continue;		/* if we specify size=0, we don't check 		 * whether "addr" is in the range of address space of device.		 * */		if (dev->size == 0) {			if (dev->write_word (dev, addr, data) != ADDR_NOHIT)				return;		}		else if ((addr >= dev->base)			 && (addr < (dev->base + dev->size))) {			if (dev->write_word (dev, addr, data) != ADDR_NOHIT)				return;		}	}	skyeye_config.mach->mach_io_write_word (state, addr, data);}