1
2
3
4
5#include <linux/init.h>
6#include <linux/sched.h>
7#include <linux/irq.h>
8#include <linux/kernel_stat.h>
9#include <linux/module.h>
10
11#include <asm/machvec.h>
12#include <asm/dma.h>
13#include <asm/perf_event.h>
14#include <asm/mce.h>
15
16#include "proto.h"
17#include "irq_impl.h"
18
19
20#ifdef CONFIG_ALPHA_BROKEN_IRQ_MASK
21int __min_ipl;
22EXPORT_SYMBOL(__min_ipl);
23#endif
24
25
26
27
28
29static void
30dummy_perf(unsigned long vector, struct pt_regs *regs)
31{
32 irq_err_count++;
33 printk(KERN_CRIT "Performance counter interrupt!\n");
34}
35
36void (*perf_irq)(unsigned long, struct pt_regs *) = dummy_perf;
37EXPORT_SYMBOL(perf_irq);
38
39
40
41
42
43asmlinkage void
44do_entInt(unsigned long type, unsigned long vector,
45 unsigned long la_ptr, struct pt_regs *regs)
46{
47 struct pt_regs *old_regs;
48
49
50
51
52
53
54
55 local_irq_disable();
56 switch (type) {
57 case 0:
58#ifdef CONFIG_SMP
59 handle_ipi(regs);
60 return;
61#else
62 irq_err_count++;
63 printk(KERN_CRIT "Interprocessor interrupt? "
64 "You must be kidding!\n");
65#endif
66 break;
67 case 1:
68 old_regs = set_irq_regs(regs);
69 handle_irq(RTC_IRQ);
70 set_irq_regs(old_regs);
71 return;
72 case 2:
73 old_regs = set_irq_regs(regs);
74 alpha_mv.machine_check(vector, la_ptr);
75 set_irq_regs(old_regs);
76 return;
77 case 3:
78 old_regs = set_irq_regs(regs);
79 alpha_mv.device_interrupt(vector);
80 set_irq_regs(old_regs);
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
92void __init
93common_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
101void __init
102init_IRQ(void)
103{
104
105
106 wrent(entInt, 0);
107
108 alpha_mv.init_irq();
109}
110
111
112
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
123struct mcheck_info __mcheck_info;
124#endif
125
126void
127process_mcheck_info(unsigned long vector, unsigned long la_ptr,
128 const char *machine, int expected)
129{
130 struct el_common *mchk_header;
131 const char *reason;
132
133
134
135
136
137
138#ifdef CONFIG_VERBOSE_MCHECK
139 if (alpha_verbose_mcheck > 1) {
140 printk(KERN_CRIT "%s machine check %s\n", machine,
141 expected ? "expected." : "NOT expected!!!");
142 }
143#endif
144
145 if (expected) {
146 int cpu = smp_processor_id();
147 mcheck_expected(cpu) = 0;
148 mcheck_taken(cpu) = 1;
149 return;
150 }
151
152 mchk_header = (struct el_common *)la_ptr;
153
154 printk(KERN_CRIT "%s machine check: vector=0x%lx pc=0x%lx code=0x%x\n",
155 machine, vector, get_irq_regs()->pc, mchk_header->code);
156
157 switch (mchk_header->code) {
158
159 case 0x80: reason = "tag parity error"; break;
160 case 0x82: reason = "tag control parity error"; break;
161 case 0x84: reason = "generic hard error"; break;
162 case 0x86: reason = "correctable ECC error"; break;
163 case 0x88: reason = "uncorrectable ECC error"; break;
164 case 0x8A: reason = "OS-specific PAL bugcheck"; break;
165 case 0x90: reason = "callsys in kernel mode"; break;
166 case 0x96: reason = "i-cache read retryable error"; break;
167 case 0x98: reason = "processor detected hard error"; break;
168
169
170 case 0x202: reason = "system detected hard error"; break;
171 case 0x203: reason = "system detected uncorrectable ECC error"; break;
172 case 0x204: reason = "SIO SERR occurred on PCI bus"; break;
173 case 0x205: reason = "parity error detected by core logic"; break;
174 case 0x206: reason = "SIO IOCHK occurred on ISA bus"; break;
175 case 0x207: reason = "non-existent memory error"; break;
176 case 0x208: reason = "MCHK_K_DCSR"; break;
177 case 0x209: reason = "PCI SERR detected"; break;
178 case 0x20b: reason = "PCI data parity error detected"; break;
179 case 0x20d: reason = "PCI address parity error detected"; break;
180 case 0x20f: reason = "PCI master abort error"; break;
181 case 0x211: reason = "PCI target abort error"; break;
182 case 0x213: reason = "scatter/gather PTE invalid error"; break;
183 case 0x215: reason = "flash ROM write error"; break;
184 case 0x217: reason = "IOA timeout detected"; break;
185 case 0x219: reason = "IOCHK#, EISA add-in board parity or other catastrophic error"; break;
186 case 0x21b: reason = "EISA fail-safe timer timeout"; break;
187 case 0x21d: reason = "EISA bus time-out"; break;
188 case 0x21f: reason = "EISA software generated NMI"; break;
189 case 0x221: reason = "unexpected ev5 IRQ[3] interrupt"; break;
190 default: reason = "unknown"; break;
191 }
192
193 printk(KERN_CRIT "machine check type: %s%s\n",
194 reason, mchk_header->retry ? " (retryable)" : "");
195
196 dik_show_regs(get_irq_regs(), NULL);
197
198#ifdef CONFIG_VERBOSE_MCHECK
199 if (alpha_verbose_mcheck > 1) {
200
201 unsigned long *ptr = (unsigned long *)la_ptr;
202 long i;
203 for (i = 0; i < mchk_header->size / sizeof(long); i += 2) {
204 printk(KERN_CRIT " +%8lx %016lx %016lx\n",
205 i*sizeof(long), ptr[i], ptr[i+1]);
206 }
207 }
208#endif
209}
210
211
212
213
214
215
216struct irqaction timer_irqaction = {
217 .handler = rtc_timer_interrupt,
218 .name = "timer",
219};
220
221void __init
222init_rtc_irq(void)
223{
224 irq_set_chip_and_handler_name(RTC_IRQ, &dummy_irq_chip,
225 handle_percpu_irq, "RTC");
226 setup_irq(RTC_IRQ, &timer_irqaction);
227}
228
229
230struct irqaction isa_cascade_irqaction = {
231 .handler = no_action,
232 .name = "isa-cascade"
233};
234
235struct irqaction timer_cascade_irqaction = {
236 .handler = no_action,
237 .name = "timer-cascade"
238};
239
240struct irqaction halt_switch_irqaction = {
241 .handler = no_action,
242 .name = "halt-switch"
243};
244