config.c

来自「linux 内核源代码」· C语言 代码 · 共 981 行 · 第 1/2 页

#define TICK_SIZE 10000

/* This is always executed with interrupts disabled.  */
static unsigned long amiga_gettimeoffset(void)
{
	unsigned short hi, lo, hi2;
	unsigned long ticks, offset = 0;

	/* read CIA B timer A current value */
	hi  = ciab.tahi;
	lo  = ciab.talo;
	hi2 = ciab.tahi;

	if (hi != hi2) {
		lo = ciab.talo;
		hi = hi2;
	}

	ticks = hi << 8 | lo;

	if (ticks > jiffy_ticks / 2)
		/* check for pending interrupt */
		if (cia_set_irq(&ciab_base, 0) & CIA_ICR_TA)
			offset = 10000;

	ticks = jiffy_ticks - ticks;
	ticks = (10000 * ticks) / jiffy_ticks;

	return ticks + offset;
}

static int a3000_hwclk(int op, struct rtc_time *t)
{
	tod_3000.cntrl1 = TOD3000_CNTRL1_HOLD;

	if (!op) { /* read */
		t->tm_sec  = tod_3000.second1 * 10 + tod_3000.second2;
		t->tm_min  = tod_3000.minute1 * 10 + tod_3000.minute2;
		t->tm_hour = tod_3000.hour1   * 10 + tod_3000.hour2;
		t->tm_mday = tod_3000.day1    * 10 + tod_3000.day2;
		t->tm_wday = tod_3000.weekday;
		t->tm_mon  = tod_3000.month1  * 10 + tod_3000.month2 - 1;
		t->tm_year = tod_3000.year1   * 10 + tod_3000.year2;
		if (t->tm_year <= 69)
			t->tm_year += 100;
	} else {
		tod_3000.second1 = t->tm_sec / 10;
		tod_3000.second2 = t->tm_sec % 10;
		tod_3000.minute1 = t->tm_min / 10;
		tod_3000.minute2 = t->tm_min % 10;
		tod_3000.hour1   = t->tm_hour / 10;
		tod_3000.hour2   = t->tm_hour % 10;
		tod_3000.day1    = t->tm_mday / 10;
		tod_3000.day2    = t->tm_mday % 10;
		if (t->tm_wday != -1)
			tod_3000.weekday = t->tm_wday;
		tod_3000.month1  = (t->tm_mon + 1) / 10;
		tod_3000.month2  = (t->tm_mon + 1) % 10;
		if (t->tm_year >= 100)
			t->tm_year -= 100;
		tod_3000.year1   = t->tm_year / 10;
		tod_3000.year2   = t->tm_year % 10;
	}

	tod_3000.cntrl1 = TOD3000_CNTRL1_FREE;

	return 0;
}

static int a2000_hwclk(int op, struct rtc_time *t)
{
	int cnt = 5;

	tod_2000.cntrl1 = TOD2000_CNTRL1_HOLD;

	while ((tod_2000.cntrl1 & TOD2000_CNTRL1_BUSY) && cnt--) {
		tod_2000.cntrl1 &= ~TOD2000_CNTRL1_HOLD;
		udelay(70);
		tod_2000.cntrl1 |= TOD2000_CNTRL1_HOLD;
	}

	if (!cnt)
		printk(KERN_INFO "hwclk: timed out waiting for RTC (0x%x)\n",
			tod_2000.cntrl1);

	if (!op) { /* read */
		t->tm_sec  = tod_2000.second1     * 10 + tod_2000.second2;
		t->tm_min  = tod_2000.minute1     * 10 + tod_2000.minute2;
		t->tm_hour = (tod_2000.hour1 & 3) * 10 + tod_2000.hour2;
		t->tm_mday = tod_2000.day1        * 10 + tod_2000.day2;
		t->tm_wday = tod_2000.weekday;
		t->tm_mon  = tod_2000.month1      * 10 + tod_2000.month2 - 1;
		t->tm_year = tod_2000.year1       * 10 + tod_2000.year2;
		if (t->tm_year <= 69)
			t->tm_year += 100;

		if (!(tod_2000.cntrl3 & TOD2000_CNTRL3_24HMODE)) {
			if (!(tod_2000.hour1 & TOD2000_HOUR1_PM) && t->tm_hour == 12)
				t->tm_hour = 0;
			else if ((tod_2000.hour1 & TOD2000_HOUR1_PM) && t->tm_hour != 12)
				t->tm_hour += 12;
		}
	} else {
		tod_2000.second1 = t->tm_sec / 10;
		tod_2000.second2 = t->tm_sec % 10;
		tod_2000.minute1 = t->tm_min / 10;
		tod_2000.minute2 = t->tm_min % 10;
		if (tod_2000.cntrl3 & TOD2000_CNTRL3_24HMODE)
			tod_2000.hour1 = t->tm_hour / 10;
		else if (t->tm_hour >= 12)
			tod_2000.hour1 = TOD2000_HOUR1_PM +
				(t->tm_hour - 12) / 10;
		else
			tod_2000.hour1 = t->tm_hour / 10;
		tod_2000.hour2   = t->tm_hour % 10;
		tod_2000.day1    = t->tm_mday / 10;
		tod_2000.day2    = t->tm_mday % 10;
		if (t->tm_wday != -1)
			tod_2000.weekday = t->tm_wday;
		tod_2000.month1  = (t->tm_mon + 1) / 10;
		tod_2000.month2  = (t->tm_mon + 1) % 10;
		if (t->tm_year >= 100)
			t->tm_year -= 100;
		tod_2000.year1   = t->tm_year / 10;
		tod_2000.year2   = t->tm_year % 10;
	}

	tod_2000.cntrl1 &= ~TOD2000_CNTRL1_HOLD;

	return 0;
}

static int amiga_set_clock_mmss(unsigned long nowtime)
{
	short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;

	if (AMIGAHW_PRESENT(A3000_CLK)) {
		tod_3000.cntrl1 = TOD3000_CNTRL1_HOLD;

		tod_3000.second1 = real_seconds / 10;
		tod_3000.second2 = real_seconds % 10;
		tod_3000.minute1 = real_minutes / 10;
		tod_3000.minute2 = real_minutes % 10;

		tod_3000.cntrl1 = TOD3000_CNTRL1_FREE;
	} else /* if (AMIGAHW_PRESENT(A2000_CLK)) */ {
		int cnt = 5;

		tod_2000.cntrl1 |= TOD2000_CNTRL1_HOLD;

		while ((tod_2000.cntrl1 & TOD2000_CNTRL1_BUSY) && cnt--) {
			tod_2000.cntrl1 &= ~TOD2000_CNTRL1_HOLD;
			udelay(70);
			tod_2000.cntrl1 |= TOD2000_CNTRL1_HOLD;
		}

		if (!cnt)
			printk(KERN_INFO "set_clock_mmss: timed out waiting for RTC (0x%x)\n", tod_2000.cntrl1);

		tod_2000.second1 = real_seconds / 10;
		tod_2000.second2 = real_seconds % 10;
		tod_2000.minute1 = real_minutes / 10;
		tod_2000.minute2 = real_minutes % 10;

		tod_2000.cntrl1 &= ~TOD2000_CNTRL1_HOLD;
	}

	return 0;
}

static unsigned int amiga_get_ss(void)
{
	unsigned int s;

	if (AMIGAHW_PRESENT(A3000_CLK)) {
		tod_3000.cntrl1 = TOD3000_CNTRL1_HOLD;
		s = tod_3000.second1 * 10 + tod_3000.second2;
		tod_3000.cntrl1 = TOD3000_CNTRL1_FREE;
	} else /* if (AMIGAHW_PRESENT(A2000_CLK)) */ {
		s = tod_2000.second1 * 10 + tod_2000.second2;
	}
	return s;
}

static NORET_TYPE void amiga_reset(void)
    ATTRIB_NORET;

static void amiga_reset(void)
{
	unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040);
	unsigned long jmp_addr = virt_to_phys(&&jmp_addr_label);

	local_irq_disable();
	if (CPU_IS_040_OR_060)
		/* Setup transparent translation registers for mapping
		 * of 16 MB kernel segment before disabling translation
		 */
		asm volatile ("\n"
			"	move.l	%0,%%d0\n"
			"	and.l	#0xff000000,%%d0\n"
			"	or.w	#0xe020,%%d0\n"   /* map 16 MB, enable, cacheable */
			"	.chip	68040\n"
			"	movec	%%d0,%%itt0\n"
			"	movec	%%d0,%%dtt0\n"
			"	.chip	68k\n"
			"	jmp	%0@\n"
			: /* no outputs */
			: "a" (jmp_addr040)
			: "d0");
	else
		/* for 680[23]0, just disable translation and jump to the physical
		 * address of the label
		 */
		asm volatile ("\n"
			"	pmove	%%tc,%@\n"
			"	bclr	#7,%@\n"
			"	pmove	%@,%%tc\n"
			"	jmp	%0@\n"
			: /* no outputs */
			: "a" (jmp_addr));
jmp_addr_label040:
	/* disable translation on '040 now */
	asm volatile ("\n"
		"	moveq	#0,%%d0\n"
		"	.chip	68040\n"
		"	movec	%%d0,%%tc\n"	/* disable MMU */
		"	.chip	68k\n"
		: /* no outputs */
		: /* no inputs */
		: "d0");

	jmp_addr_label:
	/* pickup reset address from AmigaOS ROM, reset devices and jump
	 * to reset address
	 */
	asm volatile ("\n"
		"	move.w	#0x2700,%sr\n"
		"	lea	0x01000000,%a0\n"
		"	sub.l	%a0@(-0x14),%a0\n"
		"	move.l	%a0@(4),%a0\n"
		"	subq.l	#2,%a0\n"
		"	jra	1f\n"
		/* align on a longword boundary */
		"	" __ALIGN_STR "\n"
		"1:\n"
		"	reset\n"
		"	jmp   %a0@");

	for (;;)
		;
}


    /*
     *  Debugging
     */

#define SAVEKMSG_MAXMEM		128*1024

#define SAVEKMSG_MAGIC1		0x53415645	/* 'SAVE' */
#define SAVEKMSG_MAGIC2		0x4B4D5347	/* 'KMSG' */

struct savekmsg {
	unsigned long magic1;		/* SAVEKMSG_MAGIC1 */
	unsigned long magic2;		/* SAVEKMSG_MAGIC2 */
	unsigned long magicptr;		/* address of magic1 */
	unsigned long size;
	char data[0];
};

static struct savekmsg *savekmsg;

static void amiga_mem_console_write(struct console *co, const char *s,
				    unsigned int count)
{
	if (savekmsg->size + count <= SAVEKMSG_MAXMEM-sizeof(struct savekmsg)) {
		memcpy(savekmsg->data + savekmsg->size, s, count);
		savekmsg->size += count;
	}
}

static int __init amiga_savekmsg_setup(char *arg)
{
	static struct resource debug_res = { .name = "Debug" };

	if (!MACH_IS_AMIGA || strcmp(arg, "mem"))
		goto done;

	if (!AMIGAHW_PRESENT(CHIP_RAM)) {
		printk("Warning: no chipram present for debugging\n");
		goto done;
	}

	savekmsg = amiga_chip_alloc_res(SAVEKMSG_MAXMEM, &debug_res);
	savekmsg->magic1 = SAVEKMSG_MAGIC1;
	savekmsg->magic2 = SAVEKMSG_MAGIC2;
	savekmsg->magicptr = ZTWO_PADDR(savekmsg);
	savekmsg->size = 0;

	amiga_console_driver.write = amiga_mem_console_write;
	register_console(&amiga_console_driver);

done:
	return 0;
}

early_param("debug", amiga_savekmsg_setup);

static void amiga_serial_putc(char c)
{
	amiga_custom.serdat = (unsigned char)c | 0x100;
	while (!(amiga_custom.serdatr & 0x2000))
		;
}

void amiga_serial_console_write(struct console *co, const char *s,
				unsigned int count)
{
	while (count--) {
		if (*s == '\n')
			amiga_serial_putc('\r');
		amiga_serial_putc(*s++);
	}
}

#ifdef CONFIG_SERIAL_CONSOLE
void amiga_serial_puts(const char *s)
{
	amiga_serial_console_write(NULL, s, strlen(s));
}

int amiga_serial_console_wait_key(struct console *co)
{
	int ch;

	while (!(amiga_custom.intreqr & IF_RBF))
		barrier();
	ch = amiga_custom.serdatr & 0xff;
	/* clear the interrupt, so that another character can be read */
	amiga_custom.intreq = IF_RBF;
	return ch;
}

void amiga_serial_gets(struct console *co, char *s, int len)
{
	int ch, cnt = 0;

	while (1) {
		ch = amiga_serial_console_wait_key(co);

		/* Check for backspace. */
		if (ch == 8 || ch == 127) {
			if (cnt == 0) {
				amiga_serial_putc('\007');
				continue;
			}
			cnt--;
			amiga_serial_puts("\010 \010");
			continue;
		}

		/* Check for enter. */
		if (ch == 10 || ch == 13)
			break;

		/* See if line is too long. */
		if (cnt >= len + 1) {
			amiga_serial_putc(7);
			cnt--;
			continue;
		}

		/* Store and echo character. */
		s[cnt++] = ch;
		amiga_serial_putc(ch);
	}
	/* Print enter. */
	amiga_serial_puts("\r\n");
	s[cnt] = 0;
}
#endif

static int __init amiga_debug_setup(char *arg)
{
	if (MACH_IS_AMIGA && !strcmp(arg, "ser")) {
		/* no initialization required (?) */
		amiga_console_driver.write = amiga_serial_console_write;
		register_console(&amiga_console_driver);
	}
	return 0;
}

early_param("debug", amiga_debug_setup);

#ifdef CONFIG_HEARTBEAT
static void amiga_heartbeat(int on)
{
	if (on)
		ciaa.pra &= ~2;
	else
		ciaa.pra |= 2;
}
#endif

    /*
     *  Amiga specific parts of /proc
     */

static void amiga_get_model(char *model)
{
	strcpy(model, amiga_model_name);
}


static int amiga_get_hardware_list(char *buffer)
{
	int len = 0;

	if (AMIGAHW_PRESENT(CHIP_RAM))
		len += sprintf(buffer+len, "Chip RAM:\t%ldK\n", amiga_chip_size>>10);
	len += sprintf(buffer+len, "PS Freq:\t%dHz\nEClock Freq:\t%ldHz\n",
			amiga_psfreq, amiga_eclock);
	if (AMIGAHW_PRESENT(AMI_VIDEO)) {
		char *type;
		switch (amiga_chipset) {
		case CS_OCS:
			type = "OCS";
			break;
		case CS_ECS:
			type = "ECS";
			break;
		case CS_AGA:
			type = "AGA";
			break;
		default:
			type = "Old or Unknown";
			break;
		}
		len += sprintf(buffer+len, "Graphics:\t%s\n", type);
	}

#define AMIGAHW_ANNOUNCE(name, str)			\
	if (AMIGAHW_PRESENT(name))			\
		len += sprintf (buffer+len, "\t%s\n", str)

	len += sprintf (buffer + len, "Detected hardware:\n");

	AMIGAHW_ANNOUNCE(AMI_VIDEO, "Amiga Video");
	AMIGAHW_ANNOUNCE(AMI_BLITTER, "Blitter");
	AMIGAHW_ANNOUNCE(AMBER_FF, "Amber Flicker Fixer");
	AMIGAHW_ANNOUNCE(AMI_AUDIO, "Amiga Audio");
	AMIGAHW_ANNOUNCE(AMI_FLOPPY, "Floppy Controller");
	AMIGAHW_ANNOUNCE(A3000_SCSI, "SCSI Controller WD33C93 (A3000 style)");
	AMIGAHW_ANNOUNCE(A4000_SCSI, "SCSI Controller NCR53C710 (A4000T style)");
	AMIGAHW_ANNOUNCE(A1200_IDE, "IDE Interface (A1200 style)");
	AMIGAHW_ANNOUNCE(A4000_IDE, "IDE Interface (A4000 style)");
	AMIGAHW_ANNOUNCE(CD_ROM, "Internal CD ROM drive");
	AMIGAHW_ANNOUNCE(AMI_KEYBOARD, "Keyboard");
	AMIGAHW_ANNOUNCE(AMI_MOUSE, "Mouse Port");
	AMIGAHW_ANNOUNCE(AMI_SERIAL, "Serial Port");
	AMIGAHW_ANNOUNCE(AMI_PARALLEL, "Parallel Port");
	AMIGAHW_ANNOUNCE(A2000_CLK, "Hardware Clock (A2000 style)");
	AMIGAHW_ANNOUNCE(A3000_CLK, "Hardware Clock (A3000 style)");
	AMIGAHW_ANNOUNCE(CHIP_RAM, "Chip RAM");
	AMIGAHW_ANNOUNCE(PAULA, "Paula 8364");
	AMIGAHW_ANNOUNCE(DENISE, "Denise 8362");
	AMIGAHW_ANNOUNCE(DENISE_HR, "Denise 8373");
	AMIGAHW_ANNOUNCE(LISA, "Lisa 8375");
	AMIGAHW_ANNOUNCE(AGNUS_PAL, "Normal/Fat PAL Agnus 8367/8371");
	AMIGAHW_ANNOUNCE(AGNUS_NTSC, "Normal/Fat NTSC Agnus 8361/8370");
	AMIGAHW_ANNOUNCE(AGNUS_HR_PAL, "Fat Hires PAL Agnus 8372");
	AMIGAHW_ANNOUNCE(AGNUS_HR_NTSC, "Fat Hires NTSC Agnus 8372");
	AMIGAHW_ANNOUNCE(ALICE_PAL, "PAL Alice 8374");
	AMIGAHW_ANNOUNCE(ALICE_NTSC, "NTSC Alice 8374");
	AMIGAHW_ANNOUNCE(MAGIC_REKICK, "Magic Hard Rekick");
	AMIGAHW_ANNOUNCE(PCMCIA, "PCMCIA Slot");
#ifdef CONFIG_ZORRO
	if (AMIGAHW_PRESENT(ZORRO))
		len += sprintf(buffer+len, "\tZorro II%s AutoConfig: %d Expansion "
				"Device%s\n",
				AMIGAHW_PRESENT(ZORRO3) ? "I" : "",
				zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
#endif /* CONFIG_ZORRO */

#undef AMIGAHW_ANNOUNCE

	return len;
}