Ejemplo n.º 1
0
static void __init
lasi_init_irq(struct gsc_asic *this_lasi)
{
	unsigned long lasi_base = this_lasi->hpa;

	/* Stop LASI barking for a bit */
	gsc_writel(0x00000000, lasi_base+OFFSET_IMR);

	/* clear pending interrupts */
	gsc_readl(lasi_base+OFFSET_IRR);

	/* We're not really convinced we want to reset the onboard
         * devices. Firmware does it for us...
	 */

	/* Resets */
	/* gsc_writel(0xFFFFFFFF, lasi_base+0x2000);*/	/* Parallel */
	if(pdc_add_valid(lasi_base+0x4004) == PDC_OK)
		gsc_writel(0xFFFFFFFF, lasi_base+0x4004);	/* Audio */
	/* gsc_writel(0xFFFFFFFF, lasi_base+0x5000);*/	/* Serial */ 
	/* gsc_writel(0xFFFFFFFF, lasi_base+0x6000);*/	/* SCSI */
	gsc_writel(0xFFFFFFFF, lasi_base+0x7000);	/* LAN */
	gsc_writel(0xFFFFFFFF, lasi_base+0x8000);	/* Keyboard */
	gsc_writel(0xFFFFFFFF, lasi_base+0xA000);	/* FDC */
	
	/* Ok we hit it on the head with a hammer, our Dog is now
	** comatose and muzzled.  Devices will now unmask LASI
	** interrupts as they are registered as irq's in the LASI range.
	*/
	/* XXX: I thought it was `awks that got `it on the `ead with an
	 * `ammer.  -- willy
	 */
}
Ejemplo n.º 2
0
static int __init lasi_init_chip(struct parisc_device *dev)
{
	extern void (*chassis_power_off)(void);
	struct gsc_asic *lasi;
	struct gsc_irq gsc_irq;
	int ret;

	lasi = kzalloc(sizeof(*lasi), GFP_KERNEL);
	if (!lasi)
		return -ENOMEM;

	lasi->name = "Lasi";
	lasi->hpa = dev->hpa.start;

	
	lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf;
	printk(KERN_INFO "%s version %d at 0x%lx found.\n",
		lasi->name, lasi->version, lasi->hpa);

	 
	lasi_led_init(lasi->hpa);

	
	lasi_init_irq(lasi);

	
	dev->irq = gsc_alloc_irq(&gsc_irq);
	if (dev->irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n",
				__func__);
		kfree(lasi);
		return -EBUSY;
	}

	lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi);
	if (ret < 0) {
		kfree(lasi);
		return ret;
	}

	
	gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR);

	
	ret = gsc_common_setup(dev, lasi);
	if (ret) {
		kfree(lasi);
		return ret;
	}    

	gsc_fixup_irqs(dev, lasi, lasi_choose_irq);

	
	lasi_power_off_hpa = lasi->hpa;
	chassis_power_off = lasi_power_off;
	
	return ret;
}
Ejemplo n.º 3
0
/*
** The Wright Brothers and Gecko systems have a H/W problem
** (Lasi...'nuf said) may cause a broadcast reset to lockup
** the system. An HVERSION dependent PDC call was developed
** to perform a "safe", platform specific broadcast reset instead
** of kludging up all the code.
**
** Older machines which do not implement PDC_BROADCAST_RESET will
** return (with an error) and the regular broadcast reset can be
** issued. Obviously, if the PDC does implement PDC_BROADCAST_RESET
** the PDC call will not return (the system will be reset).
*/
void machine_restart(char *cmd)
{
#ifdef FASTBOOT_SELFTEST_SUPPORT
	/*
	 ** If user has modified the Firmware Selftest Bitmap,
	 ** run the tests specified in the bitmap after the
	 ** system is rebooted w/PDC_DO_RESET.
	 **
	 ** ftc_bitmap = 0x1AUL "Skip destructive memory tests"
	 **
	 ** Using "directed resets" at each processor with the MEM_TOC
	 ** vector cleared will also avoid running destructive
	 ** memory self tests. (Not implemented yet)
	 */
	if (ftc_bitmap) {
		pdc_do_firm_test_reset(ftc_bitmap);
	}
#endif
	/* set up a new led state on systems shipped with a LED State panel */
	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_SHUTDOWN);
	
	/* "Normal" system reset */
	pdc_do_reset();

	/* Nope...box should reset with just CMD_RESET now */
	gsc_writel(CMD_RESET, COMMAND_GLOBAL);

	/* Wait for RESET to lay us to rest. */
	while (1) ;

}
Ejemplo n.º 4
0
static int __init lasi_init_chip(struct parisc_device *dev)
{
	extern void (*chassis_power_off)(void);
	struct gsc_asic *lasi;
	struct gsc_irq gsc_irq;
	int ret;

	lasi = kzalloc(sizeof(*lasi), GFP_KERNEL);
	if (!lasi)
		return -ENOMEM;

	lasi->name = "Lasi";
	lasi->hpa = dev->hpa.start;

	/* Check the 4-bit (yes, only 4) version register */
	lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf;
	printk(KERN_INFO "%s version %d at 0x%lx found.\n",
		lasi->name, lasi->version, lasi->hpa);

	/* initialize the chassis LEDs really early */ 
	lasi_led_init(lasi->hpa);

	/* Stop LASI barking for a bit */
	lasi_init_irq(lasi);

	/* the IRQ lasi should use */
	dev->irq = gsc_alloc_irq(&gsc_irq);
	if (dev->irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n",
				__func__);
		kfree(lasi);
		return -EBUSY;
	}

	lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "lasi", lasi);
	if (ret < 0) {
		kfree(lasi);
		return ret;
	}

	/* enable IRQ's for devices below LASI */
	gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR);

	/* Done init'ing, register this driver */
	ret = gsc_common_setup(dev, lasi);
	if (ret) {
		kfree(lasi);
		return ret;
	}    

	gsc_fixup_irqs(dev, lasi, lasi_choose_irq);

	/* initialize the power off function */
	lasi_power_off_hpa = lasi->hpa;
	chassis_power_off = lasi_power_off;
	
	return ret;
}
Ejemplo n.º 5
0
int __init
asp_init_chip(struct parisc_device *dev)
{
	struct busdevice *asp;
	struct gsc_irq gsc_irq;
	int irq, ret;

	asp = kmalloc(sizeof(struct busdevice), GFP_KERNEL);
	if(!asp)
		return -ENOMEM;

	asp->version = gsc_readb(dev->hpa + ASP_VER_OFFSET) & 0xf;
	asp->name = (asp->version == 1) ? "Asp" : "Cutoff";
	asp->hpa = ASP_INTERRUPT_ADDR;

	printk(KERN_INFO "%s version %d at 0x%lx found.\n", 
		asp->name, asp->version, dev->hpa);

	/* the IRQ ASP should use */
	ret = -EBUSY;
	irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
	if (irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n", __FUNCTION__);
		goto out;
	}

	ret = request_irq(gsc_irq.irq, busdev_barked, 0, "asp", asp);
	if (ret < 0)
		goto out;

	/* Save this for debugging later */
	asp->parent_irq = gsc_irq.irq;
	asp->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	/* Program VIPER to interrupt on the ASP irq */
	gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);

	/* Done init'ing, register this driver */
	ret = gsc_common_irqsetup(dev, asp);
	if (ret)
		goto out;

	fixup_child_irqs(dev, asp->busdev_region->data.irqbase, asp_choose_irq);
	/* Mongoose is a sibling of Asp, not a child... */
	fixup_child_irqs(dev->parent, asp->busdev_region->data.irqbase,
			asp_choose_irq);

	/* initialize the chassis LEDs */ 
#ifdef CONFIG_CHASSIS_LCD_LED	
	register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, 
		    (char *)ASP_LED_ADDR);
#endif

	return 0;

out:
	kfree(asp);
	return ret;
}
Ejemplo n.º 6
0
Archivo: smp.c Proyecto: 1800alex/linux
/*
 * Bring one cpu online.
 */
int smp_boot_one_cpu(int cpuid, struct task_struct *idle)
{
	const struct cpuinfo_parisc *p = &per_cpu(cpu_data, cpuid);
	long timeout;

	task_thread_info(idle)->cpu = cpuid;

	/* Let _start know what logical CPU we're booting
	** (offset into init_tasks[],cpu_data[])
	*/
	cpu_now_booting = cpuid;

	/* 
	** boot strap code needs to know the task address since
	** it also contains the process stack.
	*/
	smp_init_current_idle_task = idle ;
	mb();

	printk(KERN_INFO "Releasing cpu %d now, hpa=%lx\n", cpuid, p->hpa);

	/*
	** This gets PDC to release the CPU from a very tight loop.
	**
	** From the PA-RISC 2.0 Firmware Architecture Reference Specification:
	** "The MEM_RENDEZ vector specifies the location of OS_RENDEZ which 
	** is executed after receiving the rendezvous signal (an interrupt to 
	** EIR{0}). MEM_RENDEZ is valid only when it is nonzero and the 
	** contents of memory are valid."
	*/
	gsc_writel(TIMER_IRQ - CPU_IRQ_BASE, p->hpa);
	mb();

	/* 
	 * OK, wait a bit for that CPU to finish staggering about. 
	 * Slave will set a bit when it reaches smp_cpu_init().
	 * Once the "monarch CPU" sees the bit change, it can move on.
	 */
	for (timeout = 0; timeout < 10000; timeout++) {
		if(cpu_online(cpuid)) {
			/* Which implies Slave has started up */
			cpu_now_booting = 0;
			smp_init_current_idle_task = NULL;
			goto alive ;
		}
		udelay(100);
		barrier();
	}
	printk(KERN_CRIT "SMP: CPU:%d is stuck.\n", cpuid);
	return -1;

alive:
	/* Remember the Slave data */
	smp_debug(100, KERN_DEBUG "SMP: CPU:%d came alive after %ld _us\n",
		cpuid, timeout * 100);
	return 0;
}
Ejemplo n.º 7
0
int __init
wax_init_chip(struct parisc_device *dev)
{
	struct gsc_asic *wax;
	struct parisc_device *parent;
	struct gsc_irq gsc_irq;
	int ret;

	wax = kzalloc(sizeof(*wax), GFP_KERNEL);
	if (!wax)
		return -ENOMEM;

	wax->name = "wax";
	wax->hpa = dev->hpa.start;

	wax->version = 0;   /* gsc_readb(wax->hpa+WAX_VER); */
	printk(KERN_INFO "%s at 0x%lx found.\n", wax->name, wax->hpa);

	/* Stop wax hissing for a bit */
	wax_init_irq(wax);

	/* the IRQ wax should use */
	dev->irq = gsc_claim_irq(&gsc_irq, WAX_GSC_IRQ);
	if (dev->irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n",
				__func__);
		kfree(wax);
		return -EBUSY;
	}

	wax->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "wax", wax);
	if (ret < 0) {
		kfree(wax);
		return ret;
	}

	/* enable IRQ's for devices below WAX */
	gsc_writel(wax->eim, wax->hpa + OFFSET_IAR);

	/* Done init'ing, register this driver */
	ret = gsc_common_setup(dev, wax);
	if (ret) {
		kfree(wax);
		return ret;
	}

	gsc_fixup_irqs(dev, wax, wax_choose_irq);
	/* On 715-class machines, Wax EISA is a sibling of Wax, not a child. */
	parent = parisc_parent(dev);
	if (parent->id.hw_type != HPHW_IOA) {
		gsc_fixup_irqs(parent, wax, wax_choose_irq);
	}

	return ret;
}
Ejemplo n.º 8
0
static int __init wax_init_chip(struct parisc_device *dev)
{
	struct gsc_asic *wax;
	struct parisc_device *parent;
	struct gsc_irq gsc_irq;
	int ret;

	wax = kzalloc(sizeof(*wax), GFP_KERNEL);
	if (!wax)
		return -ENOMEM;

	wax->name = "wax";
	wax->hpa = dev->hpa.start;

	wax->version = 0;   /*                              */
	printk(KERN_INFO "%s at 0x%lx found.\n", wax->name, wax->hpa);

	/*                            */
	wax_init_irq(wax);

	/*                        */
	dev->irq = gsc_claim_irq(&gsc_irq, WAX_GSC_IRQ);
	if (dev->irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n",
				__func__);
		kfree(wax);
		return -EBUSY;
	}

	wax->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "wax", wax);
	if (ret < 0) {
		kfree(wax);
		return ret;
	}

	/*                                    */
	gsc_writel(wax->eim, wax->hpa + OFFSET_IAR);

	/*                                     */
	ret = gsc_common_setup(dev, wax);
	if (ret) {
		kfree(wax);
		return ret;
	}

	gsc_fixup_irqs(dev, wax, wax_choose_irq);
	/*                                                                   */
	parent = parisc_parent(dev);
	if (parent->id.hw_type != HPHW_IOA) {
		gsc_fixup_irqs(parent, wax, wax_choose_irq);
	}

	return ret;
}
Ejemplo n.º 9
0
static void lasi_power_off(void)
{
	unsigned long datareg;

	
	datareg = lasi_power_off_hpa + 0x0000C000;

	
	gsc_writel(0x02, datareg);
}
Ejemplo n.º 10
0
static void lasi_power_off(void)
{
	unsigned long datareg;

	/* calculate addr of the Power Control Register */
	datareg = lasi_power_off_hpa + 0x0000C000;

	/* Power down the machine */
	gsc_writel(0x02, datareg);
}
Ejemplo n.º 11
0
static inline void
ipi_send(int cpu, enum ipi_message_type op)
{
	struct cpuinfo_parisc *p = &cpu_data[cpu];
	unsigned long flags;

	spin_lock_irqsave(&(p->lock),flags);
	p->pending_ipi |= 1 << op;
	gsc_writel(IPI_IRQ - CPU_IRQ_BASE, cpu_data[cpu].hpa);
	spin_unlock_irqrestore(&(p->lock),flags);
}
Ejemplo n.º 12
0
static inline void
ipi_send(int cpu, enum ipi_message_type op)
{
	struct cpuinfo_parisc *p = &per_cpu(cpu_data, cpu);
	spinlock_t *lock = &per_cpu(ipi_lock, cpu);
	unsigned long flags;

	spin_lock_irqsave(lock, flags);
	p->pending_ipi |= 1 << op;
	gsc_writel(IPI_IRQ - CPU_IRQ_BASE, p->hpa);
	spin_unlock_irqrestore(lock, flags);
}
Ejemplo n.º 13
0
static int __init asp_init_chip(struct parisc_device *dev)
{
	struct gsc_irq gsc_irq;
	int ret;

	asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
	asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
	asp.hpa = ASP_INTERRUPT_ADDR;

#ifdef CONFIG_DEBUG_PRINTK
	printk(KERN_INFO "%s version %d at 0x%lx found.\n", 
		asp.name, asp.version, (unsigned long)dev->hpa.start);
#else
	;
#endif

	/* the IRQ ASP should use */
	ret = -EBUSY;
	dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
	if (dev->irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__);
		goto out;
	}

	asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
	if (ret < 0)
		goto out;

	/* Program VIPER to interrupt on the ASP irq */
	gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);

	/* Done init'ing, register this driver */
	ret = gsc_common_setup(dev, &asp);
	if (ret)
		goto out;

	gsc_fixup_irqs(dev, &asp, asp_choose_irq);
	/* Mongoose is a sibling of Asp, not a child... */
	gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);

	/* initialize the chassis LEDs */ 
#ifdef CONFIG_CHASSIS_LCD_LED	
	register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, 
		    ASP_LED_ADDR);
#endif

 out:
	return ret;
}
Ejemplo n.º 14
0
static void __init
lasi_init_irq(struct gsc_asic *this_lasi)
{
	unsigned long lasi_base = this_lasi->hpa;

	
	gsc_writel(0x00000000, lasi_base+OFFSET_IMR);

	
	gsc_readl(lasi_base+OFFSET_IRR);


	
		
	if(pdc_add_valid(lasi_base+0x4004) == PDC_OK)
		gsc_writel(0xFFFFFFFF, lasi_base+0x4004);	
		 
		
	gsc_writel(0xFFFFFFFF, lasi_base+0x7000);	
	gsc_writel(0xFFFFFFFF, lasi_base+0x8000);	
	gsc_writel(0xFFFFFFFF, lasi_base+0xA000);	
	
}
Ejemplo n.º 15
0
/* ONLY called from entry.S:intr_extint() */
void do_cpu_irq_mask(struct pt_regs *regs)
{
	struct pt_regs *old_regs;
	unsigned long eirr_val;
	int irq, cpu = smp_processor_id();
#ifdef CONFIG_SMP
	struct irq_desc *desc;
	cpumask_t dest;
#endif

	old_regs = set_irq_regs(regs);
	local_irq_disable();
	irq_enter();

	eirr_val = mfctl(23) & cpu_eiem & per_cpu(local_ack_eiem, cpu);
	if (!eirr_val)
		goto set_out;
	irq = eirr_to_irq(eirr_val);

#ifdef CONFIG_SMP
	desc = irq_to_desc(irq);
	cpumask_copy(&dest, desc->irq_data.affinity);
	if (irqd_is_per_cpu(&desc->irq_data) &&
	    !cpu_isset(smp_processor_id(), dest)) {
		int cpu = first_cpu(dest);

		printk(KERN_DEBUG "redirecting irq %d from CPU %d to %d\n",
		       irq, smp_processor_id(), cpu);
		gsc_writel(irq + CPU_IRQ_BASE,
			   per_cpu(cpu_data, cpu).hpa);
		goto set_out;
	}
#endif
	stack_overflow_check(regs);

#ifdef CONFIG_IRQSTACKS
	execute_on_irq_stack(&generic_handle_irq, irq);
#else
	generic_handle_irq(irq);
#endif /* CONFIG_IRQSTACKS */

 out:
	irq_exit();
	set_irq_regs(old_regs);
	return;

 set_out:
	set_eiem(cpu_eiem & per_cpu(local_ack_eiem, cpu));
	goto out;
}
Ejemplo n.º 16
0
static void gsc_asic_mask_irq(unsigned int irq)
{
	struct gsc_asic *irq_dev = get_irq_chip_data(irq);
	int local_irq = gsc_find_local_irq(irq, irq_dev->global_irq, 32);
	u32 imr;

	DEBPRINTK(KERN_DEBUG "%s(%d) %s: IMR 0x%x\n", __func__, irq,
			irq_dev->name, imr);

	/* Disable the IRQ line by clearing the bit in the IMR */
	imr = gsc_readl(irq_dev->hpa + OFFSET_IMR);
	imr &= ~(1 << local_irq);
	gsc_writel(imr, irq_dev->hpa + OFFSET_IMR);
}
Ejemplo n.º 17
0
static void
memset_tohp(void *dest, u32 word, int count)
{
	unsigned long d = ram2log(dest);

	count += 3;
	count &= ~3;

	while(count) {
		count--;
		gsc_writel(word, d);
		d += 32;
	}
}
Ejemplo n.º 18
0
static void gsc_asic_enable_irq(unsigned int irq)
{
	struct irq_desc *desc = irq_to_desc(irq);
	struct gsc_asic *irq_dev = desc->chip_data;
	int local_irq = gsc_find_local_irq(irq, irq_dev->global_irq, 32);
	u32 imr;

	DEBPRINTK(KERN_DEBUG "%s(%d) %s: IMR 0x%x\n", __func__, irq,
			irq_dev->name, imr);

	/* Enable the IRQ line by setting the bit in the IMR */
	imr = gsc_readl(irq_dev->hpa + OFFSET_IMR);
	imr |= 1 << local_irq;
	gsc_writel(imr, irq_dev->hpa + OFFSET_IMR);
}
Ejemplo n.º 19
0
static void
memcpy_fromhp_tohp(void *dest, void *src, int count)
{
	unsigned long d = ram2log(dest);
	unsigned long s = ram2log(src);

	count += 3;
	count &= ~3; /* XXX */

	while(count) {
		count --;
		gsc_writel(~gsc_readl(s), d);
		d += 32*4;
		s += 32*4;
	}
}
Ejemplo n.º 20
0
static int __init asp_init_chip(struct parisc_device *dev)
{
	struct gsc_irq gsc_irq;
	int ret;

	asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
	asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
	asp.hpa = ASP_INTERRUPT_ADDR;

	printk(KERN_INFO "%s version %d at 0x%lx found.\n", 
		asp.name, asp.version, (unsigned long)dev->hpa.start);

	
	ret = -EBUSY;
	dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
	if (dev->irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__);
		goto out;
	}

	asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
	if (ret < 0)
		goto out;

	
	gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);

	
	ret = gsc_common_setup(dev, &asp);
	if (ret)
		goto out;

	gsc_fixup_irqs(dev, &asp, asp_choose_irq);
	
	gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);

	 
#ifdef CONFIG_CHASSIS_LCD_LED	
	register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, 
		    ASP_LED_ADDR);
#endif

 out:
	return ret;
}
Ejemplo n.º 21
0
static void gsc_asic_unmask_irq(unsigned int irq)
{
	struct gsc_asic *irq_dev = get_irq_chip_data(irq);
	int local_irq = gsc_find_local_irq(irq, irq_dev->global_irq, 32);
	u32 imr;

	DEBPRINTK(KERN_DEBUG "%s(%d) %s: IMR 0x%x\n", __func__, irq,
			irq_dev->name, imr);

	/* Enable the IRQ line by setting the bit in the IMR */
	imr = gsc_readl(irq_dev->hpa + OFFSET_IMR);
	imr |= 1 << local_irq;
	gsc_writel(imr, irq_dev->hpa + OFFSET_IMR);
	/*
	 * FIXME: read IPR to make sure the IRQ isn't already pending.
	 *   If so, we need to read IRR and manually call do_irq().
	 */
}
Ejemplo n.º 22
0
static void __init
wax_init_irq(struct gsc_asic *wax)
{
	unsigned long base = wax->hpa;

	/*         */
	gsc_writel(0x00000000, base+OFFSET_IMR);

	/*                          */
	gsc_readl(base+OFFSET_IRR);

	/*                                                        
                                              
  */

	/*        */
//                                               
//                                                          
}
Ejemplo n.º 23
0
Archivo: wax.c Proyecto: 020gzh/linux
static void __init
wax_init_irq(struct gsc_asic *wax)
{
	unsigned long base = wax->hpa;

	/* Wax-off */
	gsc_writel(0x00000000, base+OFFSET_IMR);

	/* clear pending interrupts */
	gsc_readl(base+OFFSET_IRR);

	/* We're not really convinced we want to reset the onboard
         * devices. Firmware does it for us...
	 */

	/* Resets */
//	gsc_writel(0xFFFFFFFF, base+0x1000); /* HIL */
//	gsc_writel(0xFFFFFFFF, base+0x2000); /* RS232-B on Wax */
}
Ejemplo n.º 24
0
/* ONLY called from entry.S:intr_extint() */
void do_cpu_irq_mask(struct pt_regs *regs)
{
	struct pt_regs *old_regs;
	unsigned long eirr_val;
	int irq, cpu = smp_processor_id();
#ifdef CONFIG_SMP
	cpumask_t dest;
#endif

	old_regs = set_irq_regs(regs);
	local_irq_disable();
	irq_enter();

	eirr_val = mfctl(23) & cpu_eiem & per_cpu(local_ack_eiem, cpu);
	if (!eirr_val)
		goto set_out;
	irq = eirr_to_irq(eirr_val);

#ifdef CONFIG_SMP
	cpumask_copy(&dest, irq_desc[irq].affinity);
	if (CHECK_IRQ_PER_CPU(irq_desc[irq].status) &&
	    !cpu_isset(smp_processor_id(), dest)) {
		int cpu = first_cpu(dest);

		printk(KERN_DEBUG "redirecting irq %d from CPU %d to %d\n",
		       irq, smp_processor_id(), cpu);
		gsc_writel(irq + CPU_IRQ_BASE,
			   per_cpu(cpu_data, cpu).hpa);
		goto set_out;
	}
#endif
	__do_IRQ(irq);

 out:
	irq_exit();
	set_irq_regs(old_regs);
	return;

 set_out:
	set_eiem(cpu_eiem & per_cpu(local_ack_eiem, cpu));
	goto out;
}
Ejemplo n.º 25
0
static inline void ca(struct net_device *dev)
{
	gsc_writel(0, dev->base_addr + PA_CHANNEL_ATTENTION);
}
Ejemplo n.º 26
0
/*
 * Bring one cpu online.
 */
int smp_boot_one_cpu(int cpuid)
{
	const struct cpuinfo_parisc *p = &per_cpu(cpu_data, cpuid);
	struct task_struct *idle;
	long timeout;

	/* 
	 * Create an idle task for this CPU.  Note the address wed* give 
	 * to kernel_thread is irrelevant -- it's going to start
	 * where OS_BOOT_RENDEVZ vector in SAL says to start.  But
	 * this gets all the other task-y sort of data structures set
	 * up like we wish.   We need to pull the just created idle task 
	 * off the run queue and stuff it into the init_tasks[] array.  
	 * Sheesh . . .
	 */

	idle = fork_idle(cpuid);
	if (IS_ERR(idle))
		panic("SMP: fork failed for CPU:%d", cpuid);

	task_thread_info(idle)->cpu = cpuid;

	/* Let _start know what logical CPU we're booting
	** (offset into init_tasks[],cpu_data[])
	*/
	cpu_now_booting = cpuid;

	/* 
	** boot strap code needs to know the task address since
	** it also contains the process stack.
	*/
	smp_init_current_idle_task = idle ;
	mb();

	printk(KERN_INFO "Releasing cpu %d now, hpa=%lx\n", cpuid, p->hpa);

	/*
	** This gets PDC to release the CPU from a very tight loop.
	**
	** From the PA-RISC 2.0 Firmware Architecture Reference Specification:
	** "The MEM_RENDEZ vector specifies the location of OS_RENDEZ which 
	** is executed after receiving the rendezvous signal (an interrupt to 
	** EIR{0}). MEM_RENDEZ is valid only when it is nonzero and the 
	** contents of memory are valid."
	*/
	gsc_writel(TIMER_IRQ - CPU_IRQ_BASE, p->hpa);
	mb();

	/* 
	 * OK, wait a bit for that CPU to finish staggering about. 
	 * Slave will set a bit when it reaches smp_cpu_init().
	 * Once the "monarch CPU" sees the bit change, it can move on.
	 */
	for (timeout = 0; timeout < 10000; timeout++) {
		if(cpu_online(cpuid)) {
			/* Which implies Slave has started up */
			cpu_now_booting = 0;
			smp_init_current_idle_task = NULL;
			goto alive ;
		}
		udelay(100);
		barrier();
	}

	put_task_struct(idle);
	idle = NULL;

	printk(KERN_CRIT "SMP: CPU:%d is stuck.\n", cpuid);
	return -1;

alive:
	/* Remember the Slave data */
	smp_debug(100, KERN_DEBUG "SMP: CPU:%d came alive after %ld _us\n",
		cpuid, timeout * 100);
	return 0;
}
Ejemplo n.º 27
0
int __init
lasi_init_chip(struct parisc_device *dev)
{
	struct busdevice *lasi;
	struct gsc_irq gsc_irq;
	int irq, ret;

	lasi = kmalloc(sizeof(struct busdevice), GFP_KERNEL);
	if (!lasi)
		return -ENOMEM;

	lasi->name = "Lasi";
	lasi->hpa = dev->hpa;

	/* Check the 4-bit (yes, only 4) version register */
	lasi->version = gsc_readl(lasi->hpa + LASI_VER) & 0xf;
	printk(KERN_INFO "%s version %d at 0x%lx found.\n",
		lasi->name, lasi->version, lasi->hpa);

	/* initialize the chassis LEDs really early */ 
	lasi_led_init(lasi->hpa);

	/* Stop LASI barking for a bit */
	lasi_init_irq(lasi);

	/* the IRQ lasi should use */
	irq = gsc_alloc_irq(&gsc_irq);
	if (irq < 0) {
		printk(KERN_ERR "%s(): cannot get GSC irq\n",
				__FUNCTION__);
		kfree(lasi);
		return -EBUSY;
	}

	ret = request_irq(gsc_irq.irq, busdev_barked, 0, "lasi", lasi);
	if (ret < 0) {
		kfree(lasi);
		return ret;
	}

	/* Save this for debugging later */
	lasi->parent_irq = gsc_irq.irq;
	lasi->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	/* enable IRQ's for devices below LASI */
	gsc_writel(lasi->eim, lasi->hpa + OFFSET_IAR);

	/* Done init'ing, register this driver */
	ret = gsc_common_irqsetup(dev, lasi);
	if (ret) {
		kfree(lasi);
		return ret;
	}    

	fixup_child_irqs(dev, lasi->busdev_region->data.irqbase,
			lasi_choose_irq);

	/* initialize the power off function */
	/* FIXME: Record the LASI HPA for the power off function.  This should
	 * ensure that only the first LASI (the one controlling the power off)
	 * should set the HPA here */
	lasi_power_off_hpa = lasi->hpa;
	pm_power_off = lasi_power_off;
	
	return ret;
}