tgt_machdep.c

国产CPU－龙芯（loongson)BIOS源代码

/*	$Id: tgt_machdep.c,v 1.7 2004/05/27 04:14:49 wlin Exp $ */

/*
 * Copyright (c) 2001 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/param.h>
#include <sys/syslog.h>
#include <machine/endian.h>
#include <sys/device.h>
#include <machine/cpu.h>
#include <machine/pio.h>
#include <machine/intr.h>
#include <dev/pci/pcivar.h>
#include <sys/types.h>
#include <termio.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>

#include <autoconf.h>

#include <machine/cpu.h>
#include <machine/pio.h>
#include "pflash.h"
#include "dev/pflash_tgt.h"


#include <include/it8172.h>
#include <include/rtc.h>
#include <pmon/dev/ns16550.h>
#include <pmon.h>

#include "mod_x86emu.h"
#include "mod_x86emu_int10.h"
#include "mod_vgacon.h"
extern void vga_bios_init(void);
extern int kbd_initialize(void);
extern int write_at_cursor(char val);
extern const char *kbd_error_msgs[];
#include "flash.h"
#if (NMOD_FLASH_AMD + NMOD_FLASH_INTEL) == 0
#ifdef HAVE_FLASH
#undef HAVE_FLASH
#endif
#else
#define HAVE_FLASH
#endif

#if NMOD_X86EMU_INT10 == 0
//int vga_available=0;
#endif

extern int boot_i2c_read(int addr);
extern int sis6326_init(int fbaddress, int ioaddress);
extern int fb_init(void);


extern struct trapframe DBGREG;

extern void *memset(void *, int, size_t);

int kbd_available;

static int md_pipefreq = 0;
static int md_cpufreq = 0;
static int clk_invalid = 0;
static int nvram_invalid = 0;
static int cksum(void *p, size_t s, int set);

static void _probe_frequencies(void);

#ifndef NVRAM_IN_FLASH
void nvram_get(char *);
void nvram_put(char *);
#endif

extern int vgaterm(int op, struct DevEntry * dev, unsigned long param, int data);
extern int fbterm(int op, struct DevEntry * dev, unsigned long param, int data);
extern struct pci_device *vga_dev;

ConfigEntry	ConfigTable[] =
{
	{ (char *)(IT8172_PCI_IO_BASE + IT_UART_BASE), 0, ns16550, 256, CONS_BAUD, NS16550HZ },
#if NMOD_VGACON > 0
#ifndef CONFIG_VGA_CARD_SIS6326
	{ (char *)1, 0, vgaterm, 256, CONS_BAUD, NS16550HZ },
#else
	{ (char *)1, 0, fbterm, 256, CONS_BAUD, NS16550HZ },
#endif
#endif

	{ 0 }
};

unsigned long _filebase;

extern int memorysize;
extern int memorysize_high;

extern char MipsException[], MipsExceptionEnd[];

unsigned char hwethadr[6];
int fb_available = 0;
unsigned long fbaddress = 0;
unsigned long ioaddress = 0;

void initmips(unsigned int memsz);

void addr_tst1(void);
void addr_tst2(void);
void movinv1(int iter, ulong p1, ulong p2);
void test_regs(void);

void
initmips(unsigned int memsz)
{
	memorysize=(memsz&0x0000ffff) << 20;
	printf("initmips start\n");

	tgt_cpufreq();

	/*
	 *  Init PMON and debug
	 */
	cpuinfotab[0] = &DBGREG;
	dbginit(NULL);

	/*
	 *  Set up exception vectors.
	 */
	SBD_DISPLAY("BEV1",0);
	bcopy(MipsException, (char *)TLB_MISS_EXC_VEC, MipsExceptionEnd - MipsException);
	bcopy(MipsException, (char *)GEN_EXC_VEC, MipsExceptionEnd - MipsException);

	CPU_FlushCache();

	CPU_SetSR(0, SR_BOOT_EXC_VEC);
	SBD_DISPLAY("BEV0",0);
	
	printf("BEV in SR set to zero.\n");

#if 0
	/* memtest */
	addr_tst1();
	addr_tst2();
	movinv1(2,0,~0);
	movinv1(2,0xaa5555aa,~0xaa5555aa);
	printf("memtest done\n");
#endif

	/*
	 * Launch!
	 */
	main();

	
}
/*
 *  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()
{
#if NMOD_VGACON >0
	int rc;
#endif
	_pci_devinit(1);	/* PCI device initialization */
	SBD_DISPLAY("VGAI", 0);
#if (NMOD_X86EMU_INT10 > 0) || (NMOD_X86EMU >0)
	vga_bios_init();
#endif

#ifdef CONFIG_VGA_CARD_SIS6326
	SBD_DISPLAY("FRBI", 0);
 	fbaddress  =_pci_conf_read(vga_dev->pa.pa_tag,0x10);
	ioaddress  =_pci_conf_read(vga_dev->pa.pa_tag,0x18);
                                                                                                                                                            
        fbaddress = fbaddress &0xffffff00; //laster 8 bit
        ioaddress = ioaddress &0xfffffff0; //laster 4 bit
                                                                                                                                                           
        sis6326_init(fbaddress, ioaddress);
        fb_init();
        fb_available=1;
#endif	
        config_init();
        configure();
#if NMOD_VGACON >0
	rc=kbd_initialize();
	printf("%s\n",kbd_error_msgs[rc]);
	if(!rc){ 
		kbd_available=1;
	}
#endif
}

extern int test_icache_1(short *addr);
extern int test_icache_2(int addr);
extern int test_icache_3(int addr);
extern int test_ld(void);
extern void godson2_cache_flush(void);
#define tgt_putchar_uc(x) (*(void (*)(char)) (((long)tgt_putchar)|0x20000000)) (x)
#ifdef DEEP_DEBUG
void tgt_test_memory(void)
{
	register unsigned i,j;
        register volatile char * volatile cmem;
        register volatile unsigned * volatile imem;
        register volatile unsigned * volatile imem_uc;
  //      long long * volatile imem;

	printf("%s:%d executing...\n",__FUNCTION__,__LINE__);
	j = 0;
	for (i=0;i<100000;i++) {
		i++;
	}
	tgt_putchar('1');
	if (i!=j) { tgt_putchar('2'); } 
        else { tgt_putchar('('); }

        cmem = (char*)0x80400000L;
        imem = (unsigned *)0x80400000L;
        imem_uc = (unsigned *)0xa0400000L;

        for (i=0;i<64*1024/sizeof(*cmem);i++) {
          cmem[i] = 0x5a;
          if (cmem[i]!=0x5a) {
	   tgt_putchar('4');
          }else{
	   //tgt_putchar('3');
          }
        }
	puts("char access test passed");

        for (i=0;i<64*1024/sizeof(*imem);i++) {
          imem[i] = 0xaa55aa55;
          if (imem[i]!=0xaa55aa55) {
	   tgt_putchar('6');
          }else{
	   //tgt_putchar('5');
          }
        }

	puts("word access test passed");

	printf("executing...\n");
        for (i=0,j=0x87654321;i<64*1024/sizeof(*imem);i++,j+=0x01010101) {
	  imem[i] = j;
	  if (imem[i] != j) printf("error1(imem[i]=0x%x,j=0x%x.\n", imem[i],j);
	}
	CPU_FlushDCache((int)imem, 64*1024);
        for (i=0,j=0x87654321;i<64*1024/sizeof(*imem);i++,j+=0x01010101) {
	  if (imem_uc[i] != j) printf("%s:%d error(imem_uc[i]=0x%x,j=0x%x.\n", __FUNCTION__,__LINE__,imem_uc[i],j);
	}
        for (i=0,j=0x87654321;i<64*1024/sizeof(*imem);i++,j+=0x01010101) {
	  if (imem[i] != j) printf("%s:%d error(imem[i]=0x%x,j=0x%x.\n", __FUNCTION__,__LINE__,imem[i],j);
	}

	printf("%s:%d executing...\n",__FUNCTION__,__LINE__);
        for (i=0,j=0x12345678;i<64*1024/sizeof(*imem);i++,j+=0x01010101) {
	  imem_uc[i] = j;
	  if (imem_uc[i] != j) printf("%s:%d error(imem_uc[i]=0x%x,j=0x%x.\n", __FUNCTION__,__LINE__,imem_uc[i],j);
	}
	CPU_HitInvalidateDCache((int)imem, 64*1024);
        for (i=0,j=0x12345678;i<64*1024/sizeof(*imem);i++,j+=0x01010101) {
	  if (imem[i] != j) printf("%s:%d error(imem[i]=0x%x,j=0x%x.\n", __FUNCTION__,__LINE__,imem[i],j);
	}
        for (i=0,j=0x12345678;i<64*1024/sizeof(*imem);i++,j+=0x01010101) {
	  if (imem_uc[i] != j) printf("%s:%d error(imem_uc[i]=0x%x,j=0x%x.\n", __FUNCTION__,__LINE__,imem_uc[i],j);
	}

}
#endif

void
tgt_devinit()
{
	/*
	 *  Gather info about and configure caches.
	 */
	if(getenv("ocache_off")) {
		CpuOnboardCacheOn = 0;
	}
	else {
		CpuOnboardCacheOn = 1;
	}
	if(getenv("ecache_off")) {
		CpuExternalCacheOn = 0;
	}
	else {
		CpuExternalCacheOn = 1;
	}
#ifdef DEEP_DEBUG
       test_ld();
#endif
/*
       tgt_putchar('!');
       tgt_putchar('@');
       tgt_putchar('#');
       tgt_putchar('$');
*/
	
       SBD_DISPLAY("CACH",0);
       CPU_ConfigCache();
       printf("CpuPrimaryDataCacheSize %d\n",CpuPrimaryDataCacheSize);
       SBD_DISPLAY("CAC2",0);
       SBD_DISPLAY("CAC3",0);

       //godson2_cache_flush();

/*
       tgt_putchar('^');
       tgt_putchar('&');
       tgt_putchar('*');
       tgt_putchar('%');
       tgt_putchar('^');
       tgt_putchar('&');
       tgt_putchar('*');
*/
       //test_icache_2(0);
       //test_icache_3(0);
       //tgt_putchar(0x30+i);
       //tgt_putchar('Y');
      
       //tgt_test_memory();

       //tgt_putchar('Z');

	_pci_businit(1);	/* PCI bus initialization */
}

void
tgt_reboot()
{

	void (*longreach) __P((void));
	
	longreach = (void *)0xbfc00000;
	(*longreach)();
	while(1);
}

/*
 *  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(SR_COP_1_BIT|SR_FR_32|SR_EXL);
}

/*
 *  Target dependent version printout.
 *  Printout available target version information.
 */
void
tgt_cmd_vers()
{
#if 0
	printf("Board revision level: %c.\n", in8(PLD_BAR) + 'A');
	printf("PLD revision levels: %d.%d and %d.%d.\n",
					in8(PLD_ID1) >> 4, in8(PLD_ID1) & 15,
					in8(PLD_ID2) >> 4, in8(PLD_ID2) & 15);
#endif
}

/*
 *  Display 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"); 
}

#define IT8172_RTC_ADR_REG  (IT8172_PCI_IO_BASE + IT_RTC_BASE)
#define IT8172_RTC_DAT_REG  (IT8172_RTC_ADR_REG + 1)

/* Local Variables */
static volatile char *rtc_adr_reg =
        KSEG1ADDR((volatile char *)IT8172_RTC_ADR_REG);
static volatile char *rtc_dat_reg =
        KSEG1ADDR((volatile char *)IT8172_RTC_DAT_REG);
 
static inline unsigned char CMOS_READ (unsigned long addr)
{
	unsigned char retval;

 	*rtc_adr_reg = addr;
	 retval =  *rtc_dat_reg;
	 return retval;
}

void
CMOS_WRITE (unsigned char data, unsigned long addr)
{
	*rtc_adr_reg = addr;
	*rtc_dat_reg = data;
}

/* Pending */
static void init_it8172_rtc(void)
{
	int year, month, date, hour, min, sec;
	CMOS_WRITE(0x20, RTC_REG_A);/* Normal operation */
	CMOS_WRITE(RTCSB_24HR | RTC_DM_BINARY | RTC_SET, RTC_REG_B);
	CMOS_WRITE(0, RTC_REG_C);
	CMOS_WRITE(0, RTC_REG_D);
	year = CMOS_READ(RTC_YEAR);
	month = CMOS_READ(RTC_MONTH);
	date = CMOS_READ(RTC_DAY_OF_MONTH);
	hour = CMOS_READ(RTC_HOURS);
	min = CMOS_READ(RTC_MINUTES);
	sec = CMOS_READ(RTC_SECONDS);
	if( (year > 99) || (month < 1 || month > 12) || 
		(date < 1 || date > 31) || (hour > 23) || (min > 59) ||
		(sec > 59) ){
		/*
		printf("RTC time invalid, reset to epoch.\n");*/
		CMOS_WRITE(3, RTC_YEAR);
		CMOS_WRITE(1, RTC_MONTH);
		CMOS_WRITE(1, RTC_DAY_OF_MONTH);
		CMOS_WRITE(0, RTC_HOURS);
		CMOS_WRITE(0, RTC_MINUTES);
		CMOS_WRITE(0, RTC_SECONDS);
	}
	CMOS_WRITE(RTCSB_24HR | RTC_DM_BINARY, RTC_REG_B);
}

/* Pending */
static unsigned int cal_r4koff(void)
{
	unsigned long count;
	unsigned int flags;
	
	/* Start counter exactly on falling edge of update flag */
	while (CMOS_READ(RTC_REG_A) & RTC_UIP);
	while (!(CMOS_READ(RTC_REG_A) & RTC_UIP));
	
	/* Start r4k counter. */
	CPU_SetCOUNT(0);
	
 	/* Read counter exactly on falling edge of update flag */
	while (CMOS_READ(RTC_REG_A) & RTC_UIP);
	while (!(CMOS_READ(RTC_REG_A) & RTC_UIP));
	
	count = CPU_GetCOUNT();
	
	return (count / 100);
}


/* Pending */
static void
_probe_frequencies()
{
	 unsigned long r4k_offset;
	 unsigned long est_freq;
	 clk_invalid = 1;
	 init_it8172_rtc();
	 r4k_offset = cal_r4koff();
	 est_freq = 2*r4k_offset*100;
	 est_freq += 5000;    /* round */
         est_freq -= est_freq%10000;
	 md_pipefreq = est_freq*3/2;
	 md_cpufreq = est_freq;
	 printf("/nCPU frequency %d.%02d MHz\n", est_freq/1000000,
	          (est_freq%1000000)*100/1000000);
}

/*
 *   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);
}


static inline time_t
_mktime (unsigned int year, unsigned int mon,
        unsigned int day, unsigned int hour,
        unsigned int min, unsigned int sec)
{
	if (0 >= (int) (mon -= 2)) {        /* 1..12 -> 11,12,1..10 */
		mon += 12;              /* Puts Feb last since it has leap day */
		year -= 1;
	}

	return ((((unsigned long) (year/4 - year/100 + year/400 + 367*mon/12 + day) +
	         year*365 - 719499)*24 + hour /* now have hours */
	         )*60 + min /* now have minutes */
		 )*60 + sec; /* finally seconds */
}

time_t
tgt_gettime()
{
	unsigned int year, mon, day, hour, min, sec;
	unsigned char save_control;
        CMOS_WRITE(CMOS_READ(RTC_CONTROL) | RTC_DM_BINARY, RTC_CONTROL);
	save_control = CMOS_READ(RTC_CONTROL);
	
        /* Freeze it. */
        CMOS_WRITE(save_control | RTC_SET, RTC_CONTROL);

	/* Read regs. */
	sec = CMOS_READ(RTC_SECONDS);
	min = CMOS_READ(RTC_MINUTES);
	hour = CMOS_READ(RTC_HOURS);
	
        if (!(save_control & RTC_24H))
	{
		if ((hour & 0xf) == 0xc)
			hour &= 0x80;
		if (hour & 0x80)
			hour = (hour & 0xf) + 12;
	}
	day = CMOS_READ(RTC_DAY_OF_MONTH);
	mon = CMOS_READ(RTC_MONTH);
	year = CMOS_READ(RTC_YEAR);

	/* Unfreeze clock. */
	CMOS_WRITE(save_control, RTC_CONTROL);
	if ((year += 1900) < 1970)
	year += 100;