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 1.2 2002/11/16 18:01:36 pefo Exp $ */

/*
 * Copyright (c) 2000-2002 Opsycon AB  (www.opsycon.se)
 * 
 * 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 by Opsycon AB, Sweden.
 * 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 <termio.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <sys/device.h>

#include <dev/pci/pcivar.h>
#include <dev/ic/ds17285reg.h>

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

#include <autoconf.h>

#include <pflash.h>
#include "dev/pflash_tgt.h"
#include <stdlib.h>

#include <pmon.h>
#include <pmon/netio/netio.h>

#include "flash.h"
#if (NMOD_FLASH_AMD + NMOD_FLASH_INTEL) == 0
#ifdef HAVE_FLASH
#undef HAVE_FLASH
#endif
#ifdef NVRAM_IN_FLASH
#error "NVRAM_IN_FLASH defined but have no flash support!"
#endif
#else
#define HAVE_FLASH
#endif


#include "pcibr.h"
#include "mainbus.h"
#include "mod_tod.h"


extern int discouart(int, struct DevEntry *, unsigned long, int);

extern unsigned char hwethadr[6];

static int md_pipefreq = 0;	/* Zero means have to probe! */
static int md_cpufreq  = 0;	/* Zero means have to probe! */
static int clk_invalid = 0;
static int nvram_invalid = 0;

ConfigEntry	ConfigTable[] =
{
	{ (char *) GT_COM1, 0, discouart, 256, CONS_BAUD, 0 },
#if 0
	{ (char *) GT_COM2, 0, discouart, 256, CONS_BAUD, 0 },
#endif
	{ 0 }
};

static void _probe_frequencies __P((void));
static int cksum __P((void *, size_t, int));
#ifndef NVRAM_IN_FLASH
void nvram_get __P((char *));
void nvram_put __P((char *));
#endif

/*
 *  Target dependent version printout.
 *  Printout available target version information.
 */

void
tgt_cmd_vers()
{
	printf("Board revision level: %c\nFPGA revision level: %d.%d\n",
	    (inb(MISC_AREV) & 7) + 'A',
	    (inb(MISC_PREV) >> 4) & 0xf, inb(MISC_PREV) & 0xf);
}

/*
 *  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 */

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

/*
 *  Print out BSP specific info and the CPU type.
 */
void
tgt_machprint()
{
	printf("Copyright (c) 2001-2002, Opsycon AB.\n");
	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);
}


/*************************************************************************/
/*
 *	Target dependent clock and TOD chip support code
 *	================================================
 */

static void
_probe_frequencies()
{
	int i;
#ifdef HAVE_TOD
	int timeout, cur, sec, cnt;
#endif
	SBD_DISPLAY ("FREQ", CHKPNT_FREQ);

	md_pipefreq = 400000000;	/* Defaults, must be set now! */
	md_cpufreq  = 100000000;
        clk_invalid = 0;

#ifdef HAVE_TOD
	/*
	 *  Make sure clock is updating and set correctly.
	 */
	i = inb(RTC_BASE + DS_REG_CTLA);
	outb(RTC_BASE + DS_REG_CTLA, i | DS_CTLA_DV1);
	outb(RTC_BASE + DS_REG_CTLB, DS_CTLB_24);

	/*
	 * Do the next twice for two reasons. First make sure we run from
	 * cache. Second make sure synched on second update. (Pun intended!)
	 */
	for(i = 2;  i != 0; i--) {
		cnt = get_count();
		timeout = 10000000;

		sec = inb(RTC_BASE + DS_REG_SEC); 

		do {
			timeout--;
			cur = inb(RTC_BASE + DS_REG_SEC);
		} while(timeout != 0 && cur == sec);

		cnt = get_count() - cnt;
		if(timeout == 0) {
			clk_invalid = 1;
		}
	}

	/*
	 *  Calculate the external bus clock frequency.
	 */
	md_cpufreq = (cnt + 5000) / 10000;
	md_cpufreq *= 40000;
#endif /* HAVE_TOD */

	md_pipefreq = md_getpipefreq(md_cpufreq);
}


/*
 *   Returns the CPU pipeline 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);
}

void
tgt_rtinit()
{
}

#if NCMD_DATE
/*
 *  Returns the current time if a TOD clock is present or 0
 *  This code is defunct after 2088... (out of bits)
 */
#define YEARDAYS(year)  ((((year) % 4) == 0 && \
                         ((year % 100) != 0 || (year % 400) == 0)) ? 366 : 365)
#define SECMIN  (60)            /* seconds per minute */
#define SECHOUR (60*SECMIN)     /* seconds per hour */
#define SECDAY  (24*SECHOUR)    /* seconds per day */
#define SECYR   (365*SECDAY)    /* seconds per common year */

static const short dayyr[12] =
    { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };

static int
FROMBCD(int x)
{
	return((x >> 4) * 10 + (x & 0xf));
}

static int
TOBCD(int x)
{
	return((x / 10 * 16) + (x % 10));
}

time_t
tgt_gettime()
{
	struct tm tm;
	int ctrlbsave;
	time_t t;

	if(!clk_invalid) {
		ctrlbsave =  inb(RTC_BASE + DS_REG_CTLA);

		tm.tm_sec = FROMBCD(inb(RTC_BASE + DS_REG_SEC));
		tm.tm_min = FROMBCD(inb(RTC_BASE + DS_REG_MIN));
		tm.tm_hour = FROMBCD(inb(RTC_BASE + DS_REG_HOUR));
		tm.tm_wday = FROMBCD(inb(RTC_BASE + DS_REG_WDAY));
		tm.tm_mday = FROMBCD(inb(RTC_BASE + DS_REG_DATE));
		tm.tm_mon = FROMBCD(inb(RTC_BASE + DS_REG_MONTH) & 0x1f) - 1;
		tm.tm_year = FROMBCD(inb(RTC_BASE + DS_REG_YEAR));
		tm.tm_year += 100;

		tm.tm_isdst = tm.tm_gmtoff = 0;
		t = gmmktime(&tm);
	}
	else {
		t = 957960000;  /* Wed May 10 14:00:00 2000 :-) */
	}
        return(t);
}

/*
 *  Set the current time if a TOD clock is present
 */
void
tgt_settime(time_t t)
{
	struct tm *tm;
	int ctrlbsave;

	if(!clk_invalid) {
		tm = gmtime(&t);

		/* Enable register writing */
		ctrlbsave =  inb(RTC_BASE + DS_REG_CTLB);
		outb(RTC_BASE + DS_REG_CTLB, ctrlbsave | DS_CTLB_SET);

		outb(RTC_BASE + DS_REG_YEAR, TOBCD(tm->tm_year % 100));
		outb(RTC_BASE + DS_REG_MONTH,TOBCD(tm->tm_mon + 1));
		outb(RTC_BASE + DS_REG_DATE, TOBCD(tm->tm_mday));
		outb(RTC_BASE + DS_REG_WDAY, TOBCD(tm->tm_wday));
		outb(RTC_BASE + DS_REG_HOUR, TOBCD(tm->tm_hour));
		outb(RTC_BASE + DS_REG_MIN,  TOBCD(tm->tm_min));
		outb(RTC_BASE + DS_REG_SEC,  TOBCD(tm->tm_sec));

		/* Transfer new time to counters */
		outb(RTC_BASE + DS_REG_CTLB, ctrlbsave &  ~DS_CTLB_SET);
	}
}

#else

time_t
tgt_gettime()
{
	return(957960000);  /* Wed May 10 14:00:00 2000 :-) */
}

#endif /* NCMD_DATE */


#ifdef HAVE_FLASH
/*************************************************************************/
/*
 *	Target dependent Flash programming support code
 *	===============================================
 */

/*
 *  Table of flash devices on target. See pflash_tgt.h.
 *  tgt_flashmap returns the address of the table describing the
 *  current flash mapping. Some systems have only one while others
 *  have severals depending on boot flash rom mapping etc.
 */
struct fl_map tgt_fl_map8[] = {
	TARGET_FLASH_DEVICES_8 
};

void
tgt_flashinit()
{
}

struct fl_map *
tgt_flashmap()
{
	return(tgt_fl_map8);
}

/*
 *  Do whatever HW action requiered to disable flash writing.
 *  If not supported by the target, just do nothing.
 */
void
tgt_flashwrite_disable()
{
	outb(MISC_FCR, inb(MISC_FCR) & ~(MISC_FCR_BWEN | MISC_FCR_BOEN));
}

/*
 *  Do whatever HW action requiered to enable flash writing.
 *  If flash writing can't be enabled by SW return(0).
 */
int
tgt_flashwrite_enable()
{
	outb(MISC_FCR, inb(MISC_FCR) | MISC_FCR_BWEN | MISC_FCR_BOEN);
	return(1);
}

/*
 *  Some flash memory designs have a page select feature.
 *  Return zero if page ok, otherwise -1.
 */
int
tgt_flashsetpageno(int page)
{
        return(0);
}

void
tgt_flashinfo(void *p, size_t *t)
{
	struct fl_map *map;

	map = fl_find_map(p);
	if(map) {
		*t = map->fl_map_size;
	}
	else {
		*t = 0;
	}
}

/*
 *  This function is called from the boot commands when the -f switch
 *  is given. 
 */
void
tgt_flashprogram(void *p, int size, void *s, int endian)
{
	printf("Programming flash %p:%p into %p\n", s, size, p);
	if(fl_erase_device(p, size, TRUE)) {
		printf("Erase failed!\n");
		return;
	}
	if(fl_program_device(p, s, size, TRUE)) {
		printf("Programming failed!\n");
	}
	fl_verify_device(p, s, size, TRUE);
}
#endif

/*************************************************************************/
/*
 *	Target dependent Networking support code
 *	=========================================
 *
 *  Don't add code to work the HW here which is not called from the MI code.
 */

void
tgt_netinit()
{
}

/*
 *  Ethernet adapters without a serial rom or other means for getting
 *  it's ethernet address can pick it up here.
 */
int
tgt_ethaddr(char *p)
{
	bcopy((void *)&hwethadr, p, 6);
	return(0);
}

void
tgt_netreset()
{
}

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

#else
extern void longjmp(label_t *, int);
void gsignal(label_t *jb, int sig); 
void
gsignal(label_t *jb, int sig)
{
	if(jb != NULL) {
		longjmp(jb, 1);
	}
}

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;