xnu-792.1.5.tar.gz
[apple/xnu.git] / osfmk / ppc / interrupt.c
1 /*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * The contents of this file constitute Original Code as defined in and
7 * are subject to the Apple Public Source License Version 1.1 (the
8 * "License"). You may not use this file except in compliance with the
9 * License. Please obtain a copy of the License at
10 * http://www.apple.com/publicsource and read it before using this file.
11 *
12 * This Original Code and all software distributed under the License are
13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17 * License for the specific language governing rights and limitations
18 * under the License.
19 *
20 * @APPLE_LICENSE_HEADER_END@
21 */
22 /*
23 * @OSF_COPYRIGHT@
24 */
25 /*
26 * @APPLE_FREE_COPYRIGHT@
27 */
28 #include <kern/misc_protos.h>
29 #include <kern/assert.h>
30 #include <kern/thread.h>
31 #include <kern/counters.h>
32 #include <ppc/misc_protos.h>
33 #include <ppc/trap.h>
34 #include <ppc/proc_reg.h>
35 #include <ppc/exception.h>
36 #include <ppc/savearea.h>
37 #include <pexpert/pexpert.h>
38 #include <sys/kdebug.h>
39
40 perfCallback perfIntHook = 0; /* Pointer to CHUD trap hook routine */
41
42 void unresolved_kernel_trap(int trapno,
43 struct savearea *ssp,
44 unsigned int dsisr,
45 addr64_t dar,
46 const char *message);
47
48 struct savearea * interrupt(
49 int type,
50 struct savearea *ssp,
51 unsigned int dsisr,
52 unsigned int dar)
53 {
54 int current_cpu;
55 struct per_proc_info *proc_info;
56 uint64_t now;
57 thread_t thread;
58
59 disable_preemption();
60
61 if(perfIntHook) { /* Is there a hook? */
62 if(perfIntHook(type, ssp, dsisr, dar) == KERN_SUCCESS) return ssp; /* If it succeeds, we are done... */
63 }
64
65 #if 0
66 {
67 extern void fctx_text(void);
68 fctx_test();
69 }
70 #endif
71
72
73 current_cpu = cpu_number();
74 proc_info = getPerProc();
75
76 switch (type) {
77
78 case T_DECREMENTER:
79 KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_DECI, 0) | DBG_FUNC_NONE,
80 isync_mfdec(), (unsigned int)ssp->save_srr0, 0, 0, 0);
81
82 #if 0
83 if (pcsample_enable) {
84 if (find_user_regs(current_thread()))
85 add_pcsamples (user_pc(current_thread()));
86 }
87 #endif
88
89 thread = current_thread(); /* Find ourselves */
90 if(thread->machine.qactTimer != 0) { /* Is the timer set? */
91 clock_get_uptime(&now); /* Find out what time it is */
92 if (thread->machine.qactTimer <= now) { /* It is set, has it popped? */
93 thread->machine.qactTimer = 0; /* Clear single shot timer */
94 if((unsigned int)thread->machine.vmmControl & 0xFFFFFFFE) { /* Are there any virtual machines? */
95 vmm_timer_pop(thread); /* Yes, check out them out... */
96 }
97 }
98 }
99
100 rtclock_intr(0, ssp, 0);
101 break;
102
103 case T_INTERRUPT:
104 /* Call the platform interrupt routine */
105 counter_always(c_incoming_interrupts++);
106
107 KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_START,
108 current_cpu, (unsigned int)ssp->save_srr0, 0, 0, 0);
109
110 proc_info->interrupt_handler(
111 proc_info->interrupt_target,
112 proc_info->interrupt_refCon,
113 proc_info->interrupt_nub,
114 proc_info->interrupt_source);
115
116 KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_EXCP_INTR, 0) | DBG_FUNC_END,
117 0, 0, 0, 0, 0);
118
119 break;
120
121 case T_SIGP:
122 /* Did the other processor signal us? */
123 cpu_signal_handler();
124 break;
125
126 case T_SHUTDOWN:
127 cpu_doshutdown();
128 panic("returning from cpu_doshutdown()\n");
129 break;
130
131
132 default:
133 #if MACH_KDP || MACH_KDB
134 if (!Call_Debugger(type, ssp))
135 #endif
136 unresolved_kernel_trap(type, ssp, dsisr, dar, NULL);
137 break;
138 }
139
140 enable_preemption();
141 return ssp;
142 }