tgt_machdep.c

MIPS处理器的bootloader,龙芯就是用的修改过的PMON2

/*	$Id: tgt_machdep.c,v 1.3 2002/11/16 18:01:37 pefo Exp $ */

/*
 * Copyright (c) 2000 Opsycon AB  (www.opsycon.se)
 * Copyright (c) 2000 Rtmx, Inc   (www.rtmx.com)
 * Copyright (c) 2002 Patrik Lindergren (www.lindergren.com)
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed for Rtmx, Inc by
 *	Opsycon Open System Consulting AB, Sweden.
 *	This product includes software developed by Patrik Lindergren.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */
#include <sys/types.h>
#include <stdio.h>
#include <setjmp.h>
#include <termio.h>
#include <string.h>
#include <time.h>

#include <machine/cpu.h>
#include <machine/pio.h>

#include <pmon/dev/mc146818reg.h>
#include <pmon/dev/mpc107reg.h>
#include <sys/dev/pci/pcivar.h>
#include <powerpc.h>
#include <pmon.h>
#include <pmon/netio/netio.h>
#include <pmon/dev/ns16550.h>
extern void put_hex_word __P((int));

extern unsigned char hwethadr[6];

int md_pipefreq = 0;
int md_cpufreq = 0;

ConfigEntry	ConfigTable[] =
{
	{ (char *)COM1_BASE_ADDR, 0, ns16550, 256, B9600, COM1_FREQ },
	{ (char *)COM2_BASE_ADDR, 0, ns16550, 256, B9600, COM2_FREQ },
	{ 0 }
};

unsigned long _filebase;

static void _probe_frequencies __P((void));
extern void configure(void);
extern void config_init(void);

/*
 *  This function makes inital HW setup for debugger and
 *  returns the apropriate setting for the status register.
 */
register_t
tgt_enable(int machtype)
{
	/* XXX Do any HW specific setup */
	return(PSL_IR|PSL_DR|PSL_FP|PSL_RI|PSL_ME|PSL_FE_DFLT);
}


#ifdef HAVE_LOGO
/*
 *  Print out any target specific logo
 */
void
tgt_logo()
{
	printf("\n");
	printf("[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[\n");
	printf("[[[            [[[[   [[[[[[[[[[   [[[[            [[[[   [[[[[[[  [[\n");
	printf("[[   [[[[[[[[   [[[    [[[[[[[[    [[[   [[[[[[[[   [[[    [[[[[[  [[\n");
	printf("[[  [[[[[[[[[[  [[[  [  [[[[[[  [  [[[  [[[[[[[[[[  [[[  [  [[[[[  [[\n");
	printf("[[  [[[[[[[[[[  [[[  [[  [[[[  [[  [[[  [[[[[[[[[[  [[[  [[  [[[[  [[\n");
	printf("[[   [[[[[[[[   [[[  [[[  [[  [[[  [[[  [[[[[[[[[[  [[[  [[[  [[[  [[\n");
	printf("[[             [[[[  [[[[    [[[[  [[[  [[[[[[[[[[  [[[  [[[[  [[  [[\n");
	printf("[[  [[[[[[[[[[[[[[[  [[[[[  [[[[[  [[[  [[[[[[[[[[  [[[  [[[[[  [  [[\n");
	printf("[[  [[[[[[[[[[[[[[[  [[[[[[[[[[[[  [[[  [[[[[[[[[[  [[[  [[[[[[    [[\n");
	printf("[[  [[[[[[[[[[[[[[[  [[[[[[[[[[[[  [[[   [[[[[[[[   [[[  [[[[[[[   [[\n");
	printf("[[  [[[[[[[[[[[[[[[  [[[[[[[[[[[[  [[[[            [[[[  [[[[[[[[  [[\n");
	printf("[[[[[[[2000][[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[\n");
}
#endif /* HAVE_LOGO */

/*
 *  Target dependent version printout.
 *  Printout available target version information.
 */
void
tgt_cmd_vers()
{
}

static void
_probe_frequencies()
{
#if 0
	unsigned char dccr_b;
	
	SBD_DISPLAY ("FREQ", CHKPNT_FREQ);

	dccr_b = inb(CPCI680_DCCR_B);
	switch(DCCR_B_FAST_BUSFREQ(dccr_b)) {
		case 0:
			md_cpufreq = 66000000; /* Reserved in manual */
			break;
		case 1:
			md_cpufreq = 100000000;
			break;
		case 2:
			md_cpufreq = 83000000;
			break;
		case 3:
			md_cpufreq = 66000000;
			break;
	}
#else
	md_cpufreq = 100000000;
#endif
	md_pipefreq = md_getpipefreq(md_cpufreq);

	if(md_pipefreq == -1) {
		printf("Serius problem incorrect pipe freq!!!\n");
	}
		
}


/*
 *   Returns the CPU pipelie clock frequency
 */
int
tgt_pipefreq()
{
	if(md_pipefreq == 0) {
		_probe_frequencies();
	}
	return(md_pipefreq);
}

/*
 *   Returns the external clock frequency, usually the bus clock
 */
int
tgt_cpufreq()
{
	if(md_cpufreq == 0) {
		_probe_frequencies();
	}
	return(md_cpufreq);
}

/*
 *  Print out any target specific memory information
 */
void
tgt_memprint()
{

	if(tgt_gettime() == -1) {
		printf("\nWARN! Date invalid, use 'date' to set time!\n");
	}
}

void
tgt_machprint()
{
#if 0
   extern int monarch_mode;
#endif
	int flashSize;
	int cacheSpeed;
	char *cacheSize;
	unsigned char dccr_a;
	
	printf("BSP Copyright 2002, Patrik Lindergren.\n");
	dccr_a = inb(CPCI680_DCCR_A);
	cacheSpeed = 200;
	flashSize = 32;

	switch(DCCR_A_L2SIZE(dccr_a)) {
		case 0:
			cacheSize = "2 MB";
			break;
		case 1:
			cacheSize = "Not Used";
			break;
		case 2:
			cacheSize = "1 MB";
			break;
		case 3:
			cacheSize = "512 KB";
			break;
	}

	printf("Board: PowerCoreCPCI-680, Rev. %d\n", 1);
#if 0
	printf("L2 Cache Speed %d MHz, L2 Cache Size %s\n", cacheSpeed, cacheSize);
#endif
#if 0	
	if(monarch_mode == 1)
		printf("Board set to Monarch Mode\n");
#endif
	printf("CPU PowerPC %s @", md_cpuname());
} 

/*
 *  Return a suitable address for the client stack.
 *  Usually top of RAM memory.
 */

register_t
tgt_clienttos()
{
	return((memorysize & ~7) - 64);
}

/*
 *  Network stuff.
 */
void
tgt_netinit()
{
}

int
tgt_ethaddr(char *p)
{
	bcopy((void *)&hwethadr, p, 6);
	return(0);
}

void
tgt_netreset()
{
}

/*
 *  Simple display function to display a 4 char string or code.
 *  Called during startup to display progress on any feasible
 *  display before any serial port have been initialized.
 */
void
tgt_display(char *msg, int x)
{
	/* Have simple serial port driver */
	tgt_putchar(msg[0]);
	tgt_putchar(msg[1]);
	tgt_putchar(msg[2]);
	tgt_putchar(msg[3]);
	tgt_putchar(':');
	tgt_putchar(' ');
	put_hex_word(x);
	tgt_putchar('\r');
	tgt_putchar('\n');
}

void
clrhndlrs()
{
}

int
tgt_getmachtype()
{
	return(md_cputype());
}

/*
 *  Create stubs if network is not compiled in
 */
#ifdef INET
void
tgt_netpoll()
{
	splx(splhigh());
}

#else
int netopen(const char *a, int b)
{
	return -1;
}

int netread(int a, void *b, int c)
{
	return -1;
}

int netwrite(int a, const void *b, int c)
{
	return -1;
}

int netclose(int a)
{
	return -1;
}

long netlseek(int a, long b, int c)
{
	return -1;
}

int netioctl(int a, int b, void *c)
{
	return -1;
}

void netpoll(void)
{
}

void
tgt_netpoll()
{
}
#endif /*INET*/

/*
 *  Put all machine dependent initialization here. This call
 *  is done after console has been initialized so it's safe
 *  to output configuration and debug information with printf.
 */

void
tgt_devconfig()
{
        _pci_devinit(1);	/* PCI device initialization */
        config_init();
        configure();
}

void
tgt_devinit()
{
      _pci_businit(1);	/* PCI bus initialization */
}


void
tgt_machreset()
{
	tgt_netreset();
}

void
tgt_reboot()
{
	/* XXX: Todo!!! */
        outb(MPC107_PCI_ISA_IO_BASE + 0x4c, 0x08);
        while(1);
}