skyeye_mach_at91.c

skyeye-1.2-RC7-3的源代码

/*
	skyeye_mach_at91.c - define machine at91 for skyeye
	Copyright (C) 2003 Skyeye Develop Group
	for help please send mail to <[e-mail]>
	
	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 
 
*/
/*
 * 06/15/2005 	rewrite interrupt simulation
 *			walimis <[e-mail]>
 *
 * 3/24/2003 	init this file.
 * 		add machine at91's function.Most taken from original armio.c 
 * 		include: at91_mach_init, at91_io_do_cycle
 * 		at91_io_read_word, at91_io_write_word
 *			walimis <[e-mail]>
 *		
 *3/24/2003	chenyu <[e-mail]> has done the
 *		necessary work to armio.c
 * */
//koodailar add for mingw 2005.12.18 ----------------------------------------
#ifdef __MINGW32__
#include "arch/arm/common/armdefs.h"
#include "utils/stub/mingw_help.h"
#else
#include "armdefs.h"
#endif
// end ----------------------------------------------------------------------

#include "at91.h"


#define DEBUG 0
#if DEBUG
#define DBG_PRINT(a...) fprintf(stderr, ##a)
#else
#define DBG_PRINT(a...)
#endif

//chy 2005-07-28
//zzc:2005-1-1
#ifdef __CYGWIN__
#include <time.h>
//teawater add DBCT_TEST_SPEED 2005.10.04---------------------------------------
/*struct timeval
{
	long tv_sec;
	long tv_usec;
};*/
//AJ2D--------------------------------------------------------------------------
#endif

extern unsigned long Pen_buffer[8];

typedef struct at91_io
{
	ARMword syscon;		/* System control */
	ARMword sysflg;		/* System status flags */

	/* rewrite interrupt code.
	 * */
	u32 ivr;
	u32 fvr;
	u32 isr;
	u32 ipr;
	u32 imr;
	u32 cisr;
	u32 iecr;
	u32 idcr;
	u32 iccr;
	u32 iscr;
	u32 eoicr;
	u32 spu;


	ARMword tcd[2];		/* Timer/counter data */
	ARMword tcd_reload[2];	/* Last value written */
	ARMword uartdr;		/* Receive data register */
	ARMword lcdcon;		/* LCD control */
	ARMword lcd_limit;	/* 0xc0000000 <= LCD buffer < lcd_limi
				   t */
	ARMword ts_buffer[8];
	ARMword ts_addr_begin;
	ARMword ts_addr_end;

} at91_io_t;
static at91_io_t at91_io;
#define io at91_io

static void
at91_update_int (ARMul_State * state)
{
	ARMword requests = io.ipr & io.imr;
	state->NfiqSig = (requests & 0x00001) ? LOW : HIGH;
	state->NirqSig = (requests & 0x3fffe) ? LOW : HIGH;
}

/* new added functions
 * */
static void
at91_set_intr (u32 interrupt)
{
	io.ipr |= (1 << interrupt);
}
static int
at91_pending_intr (u32 interrupt)
{
	return ((io.ipr & (1 << interrupt)));
}
static void
at91_update_intr (void *mach)
{
	struct machine_config *mc = (struct machine_config *) mach;
	ARMul_State *state = (ARMul_State *) mc->state;

	ARMword requests = io.ipr & io.imr;
	state->NfiqSig = (requests & 0x00001) ? LOW : HIGH;
	state->NirqSig = (requests & 0x3fffe) ? LOW : HIGH;

}
static int
at91_mem_read_byte (void *mach, u32 addr, u32 * data)
{
	struct machine_config *mc = (struct machine_config *) mach;
	ARMul_State *state = (ARMul_State *) mc->state;
	*data = (u32) mem_read_char (state, addr);
}
static int
at91_mem_write_byte (void *mach, u32 addr, u32 data)
{
	struct machine_config *mc = (struct machine_config *) mach;
	ARMul_State *state = (ARMul_State *) mc->state;
	mem_write_char (state, addr, (char) data);
}


static void
at91_io_reset (ARMul_State * state)
{
	io.syscon = 0;
	io.sysflg = URXFE;
	io.tcd[0] = 0xffff;
	io.tcd[1] = 0xffff;
	io.tcd_reload[0] = 0xffff;
	io.tcd_reload[1] = 0xffff;
	io.uartdr = 0;
	io.lcdcon = 0;
	io.lcd_limit = 0;

	io.ts_addr_begin = 0xff00b000;
	io.ts_addr_end = 0xff00b01f;
}
static ARMword rpr;
int rcr;

//koodailar add for mingw 2005.12.18 ----------------------------------------
#ifdef __MINGW32__
void
at91_io_do_cycle (ARMul_State * state)
{
	int t;
	
	mingw_start_thread(skyeye_config.uart.fd_in);

	for (t = 0; t < 2; t++) {
		if (io.tcd[t] == 0) {

			if (io.syscon & (t ? TC2M : TC1M)) {

				io.tcd[t] = io.tcd_reload[t];
			}
			else {
				io.tcd[t] = 0xffff;
			}
			at91_set_intr (t ? IRQ_TC2 : IRQ_TC1);
			at91_update_int (state);
		}
		else {
			io.tcd[t]--;
		}
	}
	if (rcr > 0 && !(io.ipr & IRQ_USART0)) {

			if (SDL_SemTryWait(get_mingw_read_sem())==0) 
			{
	  			if(get_mingw_sem_first_time() != 1 && get_mingw_readed() == 1)
					{ 
							unsigned char buf[16];
							int n, i;
							n = 1;
							buf[0] = get_mingw_char_read();
							set_mingw_readed(0);
							for (i = 0; i < n; i++, rcr--, rpr++)
								mem_write_char (state, rpr, buf[i]);
							if (rcr == 0)
								io.sysflg &= ~URXFE;
							if (n) {
								at91_set_intr (IRQ_USART0);
								at91_update_int (state);
							}
					}
					SDL_SemPost(get_mingw_read_sem());
     			printf(" \b");
					fflush(stdout);
			}
	}			/* if (rcr > 0 && ... */
#ifndef NO_LCD
	if (!(io.ipr & IRQ_EXT1)) {	//if now has no ts interrupt,then query 
		if (Pen_buffer[6] == 1) {	//should trigger a interrupt
			*(io.ts_buffer + 0) = Pen_buffer[0];
			*(io.ts_buffer + 1) = Pen_buffer[1];
			*(io.ts_buffer + 4) = Pen_buffer[4];
			*(io.ts_buffer + 6) = Pen_buffer[6];
			at91_set_intr (IRQ_EXT1);
			Pen_buffer[6] = 0;
		}
	}
#endif
	at91_update_int (state);
}
#else

/*at91 io_do_cycle*/
void
at91_io_do_cycle (ARMul_State * state)
{
	int t;


	for (t = 0; t < 2; t++) {
		if (io.tcd[t] == 0) {

			if (io.syscon & (t ? TC2M : TC1M)) {

				io.tcd[t] = io.tcd_reload[t];
			}
			else {
				io.tcd[t] = 0xffff;
			}
			at91_set_intr (t ? IRQ_TC2 : IRQ_TC1);
			at91_update_int (state);
		}
		else {
			io.tcd[t]--;
		}
	}
	if (rcr > 0 && !(io.ipr & IRQ_USART0)) {
		fd_set rfds;
		struct timeval tv;

		FD_ZERO (&rfds);
		FD_SET (skyeye_config.uart.fd_in, &rfds);
		tv.tv_sec = 0;
		tv.tv_usec = 0;

		if (select
		    (skyeye_config.uart.fd_in + 1, &rfds, NULL, NULL,
		     &tv) == 1) {
			unsigned char buf[16];
			int n, i;
			n = read (skyeye_config.uart.fd_in, buf,
				  rcr > sizeof (buf) ? sizeof (buf) : rcr);
			for (i = 0; i < n; i++, rcr--, rpr++)
				mem_write_char (state, rpr, buf[i]);
			if (rcr == 0)
				io.sysflg &= ~URXFE;
			if (n) {
				at91_set_intr (IRQ_USART0);
				at91_update_int (state);
			}
		}
	}			/* if (rcr > 0 && ... */
#ifndef NO_LCD
	if (!(io.ipr & IRQ_EXT1)) {	//if now has no ts interrupt,then query 
		if (Pen_buffer[6] == 1) {	//should trigger a interrupt
			*(io.ts_buffer + 0) = Pen_buffer[0];
			*(io.ts_buffer + 1) = Pen_buffer[1];
			*(io.ts_buffer + 4) = Pen_buffer[4];
			*(io.ts_buffer + 6) = Pen_buffer[6];
			at91_set_intr (IRQ_EXT1);
			Pen_buffer[6] = 0;
		}
	}
#endif
	at91_update_int (state);
}
#endif
// end ----------------------------------------------------------------------		

/*
 *  * Atmel serial support for uClinux console.
 *   */

static char *uart_reg[] = {
	"CR",
	"MR",
	"IER",
	"IDR",
	"IMR",
	"CSR",
	"RHR",
	"THR",
	"BRGR",
	"RTOR",
	"TTGR",
	"RES1",
	"RPR",
	"RCR",
	"TPR",
	"TCR",
};
static ARMword
uart_read (ARMul_State * state, ARMword addr)
{
	ARMword data;

	switch ((addr & 0xfff) >> 2) {
	case 0xd:		// RCR
		data = rcr;
		break;
	case 0xf:		// TCR
		data = 0;
		break;
	case 0x5:		// CSR
		data = (1 << 9) | (1 << 1) |	/* always empty and ready */
			(rcr ? ((1 << 3) | (1 << 0)) : 0);
		break;
	case 0x0:		// CR
	case 0x1:		// MR
	case 0x2:		// IER
	case 0x3:		// IDR
	case 0x4:		// IMR
	case 0x6:		// RHR
	case 0x7:		// THR
	case 0x8:		// BRGR