[mirror_ubuntu-artful-kernel.git] / arch / alpha / kernel / irq_alpha.c

/*
 * Alpha specific irq code.
 */

#include <linux/init.h>
#include <linux/sched.h>
#include <linux/irq.h>
#include <linux/kernel_stat.h>

#include <asm/machvec.h>
#include <asm/dma.h>

#include "proto.h"
#include "irq_impl.h"

/* Hack minimum IPL during interrupt processing for broken hardware.  */
#ifdef CONFIG_ALPHA_BROKEN_IRQ_MASK
int __min_ipl;
#endif

/*
 * Performance counter hook.  A module can override this to
 * do something useful.
 */
static void
dummy_perf(unsigned long vector, struct pt_regs *regs)
{
	irq_err_count++;
	printk(KERN_CRIT "Performance counter interrupt!\n");
}

void (*perf_irq)(unsigned long, struct pt_regs *) = dummy_perf;

/*
 * The main interrupt entry point.
 */

asmlinkage void 
do_entInt(unsigned long type, unsigned long vector,
	  unsigned long la_ptr, struct pt_regs *regs)
{
	struct pt_regs *old_regs;
	switch (type) {
	case 0:
#ifdef CONFIG_SMP
		handle_ipi(regs);
		return;
#else
		irq_err_count++;
		printk(KERN_CRIT "Interprocessor interrupt? "
		       "You must be kidding!\n");
#endif
		break;
	case 1:
		old_regs = set_irq_regs(regs);
#ifdef CONFIG_SMP
	  {
		long cpu;

		local_irq_disable();
		smp_percpu_timer_interrupt(regs);
		cpu = smp_processor_id();
		if (cpu != boot_cpuid) {
		        kstat_cpu(cpu).irqs[RTC_IRQ]++;
		} else {
			handle_irq(RTC_IRQ);
		}
	  }
#else
		handle_irq(RTC_IRQ);
#endif
		set_irq_regs(old_regs);
		return;
	case 2:
		alpha_mv.machine_check(vector, la_ptr, regs);
		return;
	case 3:
		old_regs = set_irq_regs(regs);
		alpha_mv.device_interrupt(vector);
		set_irq_regs(old_regs);
		return;
	case 4:
		perf_irq(la_ptr, regs);
		return;
	default:
		printk(KERN_CRIT "Hardware intr %ld %lx? Huh?\n",
		       type, vector);
	}
	printk(KERN_CRIT "PC = %016lx PS=%04lx\n", regs->pc, regs->ps);
}

void __init
common_init_isa_dma(void)
{
	outb(0, DMA1_RESET_REG);
	outb(0, DMA2_RESET_REG);
	outb(0, DMA1_CLR_MASK_REG);
	outb(0, DMA2_CLR_MASK_REG);
}

void __init
init_IRQ(void)
{
	/* Just in case the platform init_irq() causes interrupts/mchecks
	   (as is the case with RAWHIDE, at least).  */
	wrent(entInt, 0);

	alpha_mv.init_irq();
}

/*
 * machine error checks
 */
#define MCHK_K_TPERR           0x0080
#define MCHK_K_TCPERR          0x0082
#define MCHK_K_HERR            0x0084
#define MCHK_K_ECC_C           0x0086
#define MCHK_K_ECC_NC          0x0088
#define MCHK_K_OS_BUGCHECK     0x008A
#define MCHK_K_PAL_BUGCHECK    0x0090

#ifndef CONFIG_SMP
struct mcheck_info __mcheck_info;
#endif

void
process_mcheck_info(unsigned long vector, unsigned long la_ptr,
		    struct pt_regs *regs, const char *machine,
		    int expected)
{
	struct el_common *mchk_header;
	const char *reason;

	/*
	 * See if the machine check is due to a badaddr() and if so,
	 * ignore it.
	 */

#ifdef CONFIG_VERBOSE_MCHECK
	if (alpha_verbose_mcheck > 1) {
		printk(KERN_CRIT "%s machine check %s\n", machine,
		       expected ? "expected." : "NOT expected!!!");
	}
#endif

	if (expected) {
		int cpu = smp_processor_id();
		mcheck_expected(cpu) = 0;
		mcheck_taken(cpu) = 1;
		return;
	}

	mchk_header = (struct el_common *)la_ptr;

	printk(KERN_CRIT "%s machine check: vector=0x%lx pc=0x%lx code=0x%x\n",
	       machine, vector, regs->pc, mchk_header->code);

	switch (mchk_header->code) {
	/* Machine check reasons.  Defined according to PALcode sources.  */
	case 0x80: reason = "tag parity error"; break;
	case 0x82: reason = "tag control parity error"; break;
	case 0x84: reason = "generic hard error"; break;
	case 0x86: reason = "correctable ECC error"; break;
	case 0x88: reason = "uncorrectable ECC error"; break;
	case 0x8A: reason = "OS-specific PAL bugcheck"; break;
	case 0x90: reason = "callsys in kernel mode"; break;
	case 0x96: reason = "i-cache read retryable error"; break;
	case 0x98: reason = "processor detected hard error"; break;
	
	/* System specific (these are for Alcor, at least): */
	case 0x202: reason = "system detected hard error"; break;
	case 0x203: reason = "system detected uncorrectable ECC error"; break;
	case 0x204: reason = "SIO SERR occurred on PCI bus"; break;
	case 0x205: reason = "parity error detected by core logic"; break;
	case 0x206: reason = "SIO IOCHK occurred on ISA bus"; break;
	case 0x207: reason = "non-existent memory error"; break;
	case 0x208: reason = "MCHK_K_DCSR"; break;
	case 0x209: reason = "PCI SERR detected"; break;
	case 0x20b: reason = "PCI data parity error detected"; break;
	case 0x20d: reason = "PCI address parity error detected"; break;
	case 0x20f: reason = "PCI master abort error"; break;
	case 0x211: reason = "PCI target abort error"; break;
	case 0x213: reason = "scatter/gather PTE invalid error"; break;
	case 0x215: reason = "flash ROM write error"; break;
	case 0x217: reason = "IOA timeout detected"; break;
	case 0x219: reason = "IOCHK#, EISA add-in board parity or other catastrophic error"; break;
	case 0x21b: reason = "EISA fail-safe timer timeout"; break;
	case 0x21d: reason = "EISA bus time-out"; break;
	case 0x21f: reason = "EISA software generated NMI"; break;
	case 0x221: reason = "unexpected ev5 IRQ[3] interrupt"; break;
	default: reason = "unknown"; break;
	}

	printk(KERN_CRIT "machine check type: %s%s\n",
	       reason, mchk_header->retry ? " (retryable)" : "");

	dik_show_regs(regs, NULL);

#ifdef CONFIG_VERBOSE_MCHECK
	if (alpha_verbose_mcheck > 1) {
		/* Dump the logout area to give all info.  */
		unsigned long *ptr = (unsigned long *)la_ptr;
		long i;
		for (i = 0; i < mchk_header->size / sizeof(long); i += 2) {
			printk(KERN_CRIT "   +%8lx %016lx %016lx\n",
			       i*sizeof(long), ptr[i], ptr[i+1]);
		}
	}
#endif /* CONFIG_VERBOSE_MCHECK */
}

/*
 * The special RTC interrupt type.  The interrupt itself was
 * processed by PALcode, and comes in via entInt vector 1.
 */

static void rtc_enable_disable(unsigned int irq) { }
static unsigned int rtc_startup(unsigned int irq) { return 0; }

struct irqaction timer_irqaction = {
	.handler	= timer_interrupt,
	.flags		= IRQF_DISABLED,
	.name		= "timer",
};

static struct hw_interrupt_type rtc_irq_type = {
	.typename	= "RTC",
	.startup	= rtc_startup,
	.shutdown	= rtc_enable_disable,
	.enable		= rtc_enable_disable,
	.disable	= rtc_enable_disable,
	.ack		= rtc_enable_disable,
	.end		= rtc_enable_disable,
};

void __init
init_rtc_irq(void)
{
	irq_desc[RTC_IRQ].status = IRQ_DISABLED;
	irq_desc[RTC_IRQ].chip = &rtc_irq_type;
	setup_irq(RTC_IRQ, &timer_irqaction);
}

/* Dummy irqactions.  */
struct irqaction isa_cascade_irqaction = {
	.handler	= no_action,
	.name		= "isa-cascade"
};

struct irqaction timer_cascade_irqaction = {
	.handler	= no_action,
	.name		= "timer-cascade"
};

struct irqaction halt_switch_irqaction = {
	.handler	= no_action,
	.name		= "halt-switch"
};
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Alpha specific irq code.
	3	*/
	4
1da177e4 LT	5	#include <linux/init.h>
	6	#include <linux/sched.h>
	7	#include <linux/irq.h>
	8	#include <linux/kernel_stat.h>
	9
	10	#include <asm/machvec.h>
	11	#include <asm/dma.h>
	12
	13	#include "proto.h"
	14	#include "irq_impl.h"
	15
	16	/* Hack minimum IPL during interrupt processing for broken hardware. */
	17	#ifdef CONFIG_ALPHA_BROKEN_IRQ_MASK
	18	int __min_ipl;
	19	#endif
	20
	21	/*
	22	* Performance counter hook. A module can override this to
	23	* do something useful.
	24	*/
	25	static void
	26	dummy_perf(unsigned long vector, struct pt_regs *regs)
	27	{
	28	irq_err_count++;
	29	printk(KERN_CRIT "Performance counter interrupt!\n");
	30	}
	31
	32	void (perf_irq)(unsigned long, struct pt_regs ) = dummy_perf;
	33
	34	/*
	35	* The main interrupt entry point.
	36	*/
	37
	38	asmlinkage void
	39	do_entInt(unsigned long type, unsigned long vector,
	40	unsigned long la_ptr, struct pt_regs *regs)
	41	{
7ca56053	42	struct pt_regs *old_regs;
1da177e4 LT	43	switch (type) {
	44	case 0:
	45	#ifdef CONFIG_SMP
	46	handle_ipi(regs);
	47	return;
	48	#else
	49	irq_err_count++;
	50	printk(KERN_CRIT "Interprocessor interrupt? "
	51	"You must be kidding!\n");
	52	#endif
	53	break;
	54	case 1:
3dbb8c62	55	old_regs = set_irq_regs(regs);
1da177e4 LT	56	#ifdef CONFIG_SMP
	57	{
	58	long cpu;
4a89a04f IK	59
4a89a04f IK	60	local_irq_disable();
1da177e4 LT	61	smp_percpu_timer_interrupt(regs);
	62	cpu = smp_processor_id();
	63	if (cpu != boot_cpuid) {
	64	kstat_cpu(cpu).irqs[RTC_IRQ]++;
	65	} else {
3dbb8c62	66	handle_irq(RTC_IRQ);
1da177e4 LT	67	}
	68	}
	69	#else
3dbb8c62	70	handle_irq(RTC_IRQ);
1da177e4	71	#endif
3dbb8c62	72	set_irq_regs(old_regs);
1da177e4 LT	73	return;
	74	case 2:
	75	alpha_mv.machine_check(vector, la_ptr, regs);
	76	return;
	77	case 3:
7ca56053 AV	78	old_regs = set_irq_regs(regs);
	79	alpha_mv.device_interrupt(vector);
	80	set_irq_regs(old_regs);
1da177e4 LT	81	return;
	82	case 4:
	83	perf_irq(la_ptr, regs);
	84	return;
	85	default:
	86	printk(KERN_CRIT "Hardware intr %ld %lx? Huh?\n",
	87	type, vector);
	88	}
	89	printk(KERN_CRIT "PC = %016lx PS=%04lx\n", regs->pc, regs->ps);
	90	}
	91
	92	void __init
	93	common_init_isa_dma(void)
	94	{
	95	outb(0, DMA1_RESET_REG);
	96	outb(0, DMA2_RESET_REG);
	97	outb(0, DMA1_CLR_MASK_REG);
	98	outb(0, DMA2_CLR_MASK_REG);
	99	}
	100
	101	void __init
	102	init_IRQ(void)
	103	{
	104	/* Just in case the platform init_irq() causes interrupts/mchecks
	105	(as is the case with RAWHIDE, at least). */
	106	wrent(entInt, 0);
	107
	108	alpha_mv.init_irq();
	109	}
	110
	111	/*
	112	* machine error checks
	113	*/
	114	#define MCHK_K_TPERR 0x0080
	115	#define MCHK_K_TCPERR 0x0082
	116	#define MCHK_K_HERR 0x0084
	117	#define MCHK_K_ECC_C 0x0086
	118	#define MCHK_K_ECC_NC 0x0088
	119	#define MCHK_K_OS_BUGCHECK 0x008A
	120	#define MCHK_K_PAL_BUGCHECK 0x0090
	121
	122	#ifndef CONFIG_SMP
	123	struct mcheck_info __mcheck_info;
	124	#endif
	125
	126	void
	127	process_mcheck_info(unsigned long vector, unsigned long la_ptr,
	128	struct pt_regs regs, const char machine,
	129	int expected)
	130	{
	131	struct el_common *mchk_header;
	132	const char *reason;
	133
	134	/*
	135	* See if the machine check is due to a badaddr() and if so,
	136	* ignore it.
	137	*/
	138
	139	#ifdef CONFIG_VERBOSE_MCHECK
	140	if (alpha_verbose_mcheck > 1) {
	141	printk(KERN_CRIT "%s machine check %s\n", machine,
	142	expected ? "expected." : "NOT expected!!!");
	143	}
	144	#endif
145
146	if (expected) {
147	int cpu = smp_processor_id();
148	mcheck_expected(cpu) = 0;
149	mcheck_taken(cpu) = 1;
150	return;
151	}
152
153	mchk_header = (struct el_common *)la_ptr;
154
155	printk(KERN_CRIT "%s machine check: vector=0x%lx pc=0x%lx code=0x%x\n",
156	machine, vector, regs->pc, mchk_header->code);
157
158	switch (mchk_header->code) {
159	/* Machine check reasons. Defined according to PALcode sources. */
160	case 0x80: reason = "tag parity error"; break;
161	case 0x82: reason = "tag control parity error"; break;
162	case 0x84: reason = "generic hard error"; break;
163	case 0x86: reason = "correctable ECC error"; break;
164	case 0x88: reason = "uncorrectable ECC error"; break;
165	case 0x8A: reason = "OS-specific PAL bugcheck"; break;
166	case 0x90: reason = "callsys in kernel mode"; break;
167	case 0x96: reason = "i-cache read retryable error"; break;
168	case 0x98: reason = "processor detected hard error"; break;
169
170	/* System specific (these are for Alcor, at least): */
171	case 0x202: reason = "system detected hard error"; break;
172	case 0x203: reason = "system detected uncorrectable ECC error"; break;
173	case 0x204: reason = "SIO SERR occurred on PCI bus"; break;
174	case 0x205: reason = "parity error detected by core logic"; break;
175	case 0x206: reason = "SIO IOCHK occurred on ISA bus"; break;
176	case 0x207: reason = "non-existent memory error"; break;
177	case 0x208: reason = "MCHK_K_DCSR"; break;
178	case 0x209: reason = "PCI SERR detected"; break;
179	case 0x20b: reason = "PCI data parity error detected"; break;
180	case 0x20d: reason = "PCI address parity error detected"; break;
181	case 0x20f: reason = "PCI master abort error"; break;
182	case 0x211: reason = "PCI target abort error"; break;
183	case 0x213: reason = "scatter/gather PTE invalid error"; break;
184	case 0x215: reason = "flash ROM write error"; break;
185	case 0x217: reason = "IOA timeout detected"; break;
186	case 0x219: reason = "IOCHK#, EISA add-in board parity or other catastrophic error"; break;
187	case 0x21b: reason = "EISA fail-safe timer timeout"; break;
188	case 0x21d: reason = "EISA bus time-out"; break;
189	case 0x21f: reason = "EISA software generated NMI"; break;
190	case 0x221: reason = "unexpected ev5 IRQ[3] interrupt"; break;
191	default: reason = "unknown"; break;
192	}
193
194	printk(KERN_CRIT "machine check type: %s%s\n",
195	reason, mchk_header->retry ? " (retryable)" : "");
196
197	dik_show_regs(regs, NULL);
198
199	#ifdef CONFIG_VERBOSE_MCHECK
200	if (alpha_verbose_mcheck > 1) {
201	/* Dump the logout area to give all info. */
202	unsigned long ptr = (unsigned long )la_ptr;
203	long i;
204	for (i = 0; i < mchk_header->size / sizeof(long); i += 2) {
205	printk(KERN_CRIT " +%8lx %016lx %016lx\n",
206	i*sizeof(long), ptr[i], ptr[i+1]);
207	}
208	}
209	#endif /* CONFIG_VERBOSE_MCHECK */
210	}
211
212	/*
213	* The special RTC interrupt type. The interrupt itself was
214	* processed by PALcode, and comes in via entInt vector 1.
215	*/
216
217	static void rtc_enable_disable(unsigned int irq) { }
218	static unsigned int rtc_startup(unsigned int irq) { return 0; }
219
220	struct irqaction timer_irqaction = {
221	.handler = timer_interrupt,
d18ecedc	222	.flags = IRQF_DISABLED,
1da177e4 LT	223	.name = "timer",
	224	};
	225
	226	static struct hw_interrupt_type rtc_irq_type = {
	227	.typename = "RTC",
	228	.startup = rtc_startup,
	229	.shutdown = rtc_enable_disable,
	230	.enable = rtc_enable_disable,
	231	.disable = rtc_enable_disable,
	232	.ack = rtc_enable_disable,
	233	.end = rtc_enable_disable,
	234	};
	235
	236	void __init
	237	init_rtc_irq(void)
	238	{
	239	irq_desc[RTC_IRQ].status = IRQ_DISABLED;
d1bef4ed	240	irq_desc[RTC_IRQ].chip = &rtc_irq_type;
1da177e4 LT	241	setup_irq(RTC_IRQ, &timer_irqaction);
	242	}
	243
	244	/* Dummy irqactions. */
	245	struct irqaction isa_cascade_irqaction = {
	246	.handler = no_action,
	247	.name = "isa-cascade"
	248	};
	249
	250	struct irqaction timer_cascade_irqaction = {
	251	.handler = no_action,
	252	.name = "timer-cascade"
	253	};
	254
	255	struct irqaction halt_switch_irqaction = {
	256	.handler = no_action,
	257	.name = "halt-switch"
	258	};