tx4927_irq.c

linux-2.4.29操作系统的源码

#endif

	if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
		tx4927_irq_cp0_enable(irq);
	}

	return;
}

/*
 * Functions for pic
 */

u32 tx4927_irq_pic_addr(int irq)
{
	/* MVMCP -- need to formulize this */
	irq -= TX4927_IRQ_PIC_BEG;
	switch (irq) {
	case 17:
	case 16:
	case 1:
	case 0:
		return (0xff1ff610);

	case 19:
	case 18:
	case 3:
	case 2:
		return (0xff1ff614);

	case 21:
	case 20:
	case 5:
	case 4:
		return (0xff1ff618);

	case 23:
	case 22:
	case 7:
	case 6:
		return (0xff1ff61c);

	case 25:
	case 24:
	case 9:
	case 8:
		return (0xff1ff620);

	case 27:
	case 26:
	case 11:
	case 10:
		return (0xff1ff624);

	case 29:
	case 28:
	case 13:
	case 12:
		return (0xff1ff628);

	case 31:
	case 30:
	case 15:
	case 14:
		return (0xff1ff62c);

	}
	return (0);
}

u32 tx4927_irq_pic_mask(int irq)
{
	/* MVMCP -- need to formulize this */
	irq -= TX4927_IRQ_PIC_BEG;
	switch (irq) {
	case 31:
	case 29:
	case 27:
	case 25:
	case 23:
	case 21:
	case 19:
	case 17:{
			return (0x07000000);
		}
	case 30:
	case 28:
	case 26:
	case 24:
	case 22:
	case 20:
	case 18:
	case 16:{
			return (0x00070000);
		}
	case 15:
	case 13:
	case 11:
	case 9:
	case 7:
	case 5:
	case 3:
	case 1:{
			return (0x00000700);
		}
	case 14:
	case 12:
	case 10:
	case 8:
	case 6:
	case 4:
	case 2:
	case 0:{
			return (0x00000007);
		}
	}
	return (0x00000000);
}

static void tx4927_irq_pic_modify(unsigned pic_reg, unsigned clr_bits,
	unsigned set_bits)
{
	unsigned long val = 0;

	val = TX4927_RD(pic_reg);
	val &= (~clr_bits);
	val |= (set_bits);
	TX4927_WR(pic_reg, val);

	return;
}

static void __init tx4927_irq_pic_init(void)
{
	unsigned long flags;
	int i;

	TX4927_IRQ_DPRINTK(TX4927_IRQ_PIC_INIT, "beg=%d end=%d\n",
			   TX4927_IRQ_PIC_BEG, TX4927_IRQ_PIC_END);

	for (i = TX4927_IRQ_PIC_BEG; i <= TX4927_IRQ_PIC_END; i++) {
		irq_desc[i].status = IRQ_DISABLED;
		irq_desc[i].action = 0;
		irq_desc[i].depth = 2;
		irq_desc[i].handler = &tx4927_irq_pic_type;
	}

	setup_irq(TX4927_IRQ_NEST_PIC_ON_CP0, &tx4927_irq_pic_action);

	spin_lock_irqsave(&tx4927_pic_lock, flags);

	TX4927_WR(0xff1ff640, 0x6);	/* irq level mask -- only accept hightest */
	TX4927_WR(0xff1ff600, TX4927_RD(0xff1ff600) | 0x1);	/* irq enable */

	spin_unlock_irqrestore(&tx4927_pic_lock, flags);

	return;
}

static unsigned int tx4927_irq_pic_startup(unsigned int irq)
{
	TX4927_IRQ_DPRINTK(TX4927_IRQ_PIC_STARTUP, "irq=%d\n", irq);

#ifdef TX4927_IRQ_CHECK_PIC
	{
		if (irq < TX4927_IRQ_PIC_BEG || irq > TX4927_IRQ_PIC_END) {
			TX4927_IRQ_DPRINTK(TX4927_IRQ_EROR,
					   "bad irq=%d \n", irq);
			panic("\n");
		}
	}
#endif

	tx4927_irq_pic_enable(irq);

	return (0);
}

static void tx4927_irq_pic_shutdown(unsigned int irq)
{
	TX4927_IRQ_DPRINTK(TX4927_IRQ_PIC_SHUTDOWN, "irq=%d\n", irq);

#ifdef TX4927_IRQ_CHECK_PIC
	{
		if (irq < TX4927_IRQ_PIC_BEG || irq > TX4927_IRQ_PIC_END) {
			TX4927_IRQ_DPRINTK(TX4927_IRQ_EROR,
					   "bad irq=%d \n", irq);
			panic("\n");
		}
	}
#endif

	tx4927_irq_pic_disable(irq);

	return;
}

static void tx4927_irq_pic_enable(unsigned int irq)
{
	unsigned long flags;

	TX4927_IRQ_DPRINTK(TX4927_IRQ_PIC_ENABLE, "irq=%d\n", irq);

#ifdef TX4927_IRQ_CHECK_PIC
	{
		if (irq < TX4927_IRQ_PIC_BEG || irq > TX4927_IRQ_PIC_END) {
			TX4927_IRQ_DPRINTK(TX4927_IRQ_EROR,
					   "bad irq=%d \n", irq);
			panic("\n");
		}
	}
#endif

	spin_lock_irqsave(&tx4927_pic_lock, flags);

	tx4927_irq_pic_modify(tx4927_irq_pic_addr(irq), 0,
			      tx4927_irq_pic_mask(irq));

	spin_unlock_irqrestore(&tx4927_pic_lock, flags);

	return;
}

static void tx4927_irq_pic_disable(unsigned int irq)
{
	unsigned long flags;

	TX4927_IRQ_DPRINTK(TX4927_IRQ_PIC_DISABLE, "irq=%d\n", irq);

#ifdef TX4927_IRQ_CHECK_PIC
	{
		if (irq < TX4927_IRQ_PIC_BEG || irq > TX4927_IRQ_PIC_END) {
			TX4927_IRQ_DPRINTK(TX4927_IRQ_EROR,
					   "bad irq=%d \n", irq);
			panic("\n");
		}
	}
#endif

	spin_lock_irqsave(&tx4927_pic_lock, flags);

	tx4927_irq_pic_modify(tx4927_irq_pic_addr(irq),
			      tx4927_irq_pic_mask(irq), 0);

	spin_unlock_irqrestore(&tx4927_pic_lock, flags);

	return;
}

static void tx4927_irq_pic_mask_and_ack(unsigned int irq)
{
	TX4927_IRQ_DPRINTK(TX4927_IRQ_PIC_MASK, "irq=%d\n", irq);

#ifdef TX4927_IRQ_CHECK_PIC
	{
		if (irq < TX4927_IRQ_PIC_BEG || irq > TX4927_IRQ_PIC_END) {
			TX4927_IRQ_DPRINTK(TX4927_IRQ_EROR,
					   "bad irq=%d \n", irq);
			panic("\n");
		}
	}
#endif

	tx4927_irq_pic_disable(irq);

	return;
}

static void tx4927_irq_pic_end(unsigned int irq)
{
	TX4927_IRQ_DPRINTK(TX4927_IRQ_PIC_ENDIRQ, "irq=%d\n", irq);

#ifdef TX4927_IRQ_CHECK_PIC
	{
		if (irq < TX4927_IRQ_PIC_BEG || irq > TX4927_IRQ_PIC_END) {
			TX4927_IRQ_DPRINTK(TX4927_IRQ_EROR,
					   "bad irq=%d \n", irq);
			panic("\n");
		}
	}
#endif

	if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
		tx4927_irq_pic_enable(irq);
	}

	return;
}

/*
 * Main init functions
 */
void __init tx4927_irq_init(void)
{
	extern asmlinkage void tx4927_irq_handler(void);

	TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "-\n");

	TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "=Calling tx4927_irq_cp0_init()\n");
	tx4927_irq_cp0_init();

	TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "=Calling tx4927_irq_pic_init()\n");
	tx4927_irq_pic_init();

	TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT,
			   "=Calling set_except_vector(tx4927_irq_handler)\n");
	set_except_vector(0, tx4927_irq_handler);

	TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "+\n");

	return;
}

int tx4927_irq_nested(void)
{
	int sw_irq = 0;
	u32 level2;

	TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST1, "-\n");

	level2 = TX4927_RD(0xff1ff6a0);
	TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST2, "=level2a=0x%x\n", level2);

	if ((level2 & 0x10000) == 0) {
		level2 &= 0x1f;
		TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST3, "=level2b=0x%x\n", level2);

		sw_irq = TX4927_IRQ_PIC_BEG + level2;
		TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST3, "=sw_irq=%d\n", sw_irq);

		if (sw_irq == 27) {
			TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST4, "=irq-%d\n",
					   sw_irq);

#ifdef CONFIG_TOSHIBA_RBTX4927
			{
				extern int toshiba_rbtx4927_irq_nested(int sw_irq);

				sw_irq = toshiba_rbtx4927_irq_nested(sw_irq);
			}
#endif

			TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST4, "=irq+%d\n",
					   sw_irq);
		}
	}

	TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST2, "=sw_irq=%d\n", sw_irq);

	TX4927_IRQ_DPRINTK(TX4927_IRQ_NEST1, "+\n");

	return (sw_irq);
}