Rev 534 | Rev 574 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1 | jermar | 1 | /* |
319 | jermar | 2 | * Copyright (C) 2003-2004 Jakub Jermar |
1 | jermar | 3 | * All rights reserved. |
4 | * |
||
5 | * Redistribution and use in source and binary forms, with or without |
||
6 | * modification, are permitted provided that the following conditions |
||
7 | * are met: |
||
8 | * |
||
9 | * - Redistributions of source code must retain the above copyright |
||
10 | * notice, this list of conditions and the following disclaimer. |
||
11 | * - Redistributions in binary form must reproduce the above copyright |
||
12 | * notice, this list of conditions and the following disclaimer in the |
||
13 | * documentation and/or other materials provided with the distribution. |
||
14 | * - The name of the author may not be used to endorse or promote products |
||
15 | * derived from this software without specific prior written permission. |
||
16 | * |
||
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
27 | */ |
||
28 | |||
29 | #include <arch/interrupt.h> |
||
30 | #include <arch/types.h> |
||
31 | #include <arch.h> |
||
32 | #include <arch/cp0.h> |
||
33 | #include <time/clock.h> |
||
34 | #include <panic.h> |
||
332 | palkovsky | 35 | #include <print.h> |
36 | #include <symtab.h> |
||
37 | #include <arch/drivers/arc.h> |
||
509 | jermar | 38 | #include <arch/drivers/keyboard.h> |
1 | jermar | 39 | |
332 | palkovsky | 40 | static void print_regdump(struct exception_regdump *pstate) |
41 | { |
||
42 | char *pcsymbol = ""; |
||
43 | char *rasymbol = ""; |
||
44 | |||
45 | char *s = get_symtab_entry(pstate->epc); |
||
46 | if (s) |
||
47 | pcsymbol = s; |
||
48 | s = get_symtab_entry(pstate->ra); |
||
49 | if (s) |
||
50 | rasymbol = s; |
||
51 | |||
52 | printf("PC: %X(%s) RA: %X(%s)\n",pstate->epc,pcsymbol, |
||
53 | pstate->ra,rasymbol); |
||
54 | } |
||
55 | |||
413 | jermar | 56 | /** Disable interrupts. |
57 | * |
||
58 | * @return Old interrupt priority level. |
||
59 | */ |
||
60 | ipl_t interrupts_disable(void) |
||
1 | jermar | 61 | { |
413 | jermar | 62 | ipl_t ipl = (ipl_t) cp0_status_read(); |
63 | cp0_status_write(ipl & ~cp0_status_ie_enabled_bit); |
||
64 | return ipl; |
||
1 | jermar | 65 | } |
66 | |||
413 | jermar | 67 | /** Enable interrupts. |
68 | * |
||
69 | * @return Old interrupt priority level. |
||
70 | */ |
||
71 | ipl_t interrupts_enable(void) |
||
1 | jermar | 72 | { |
413 | jermar | 73 | ipl_t ipl = (ipl_t) cp0_status_read(); |
74 | cp0_status_write(ipl | cp0_status_ie_enabled_bit); |
||
75 | return ipl; |
||
1 | jermar | 76 | } |
77 | |||
413 | jermar | 78 | /** Restore interrupt priority level. |
79 | * |
||
80 | * @param ipl Saved interrupt priority level. |
||
81 | */ |
||
82 | void interrupts_restore(ipl_t ipl) |
||
1 | jermar | 83 | { |
413 | jermar | 84 | cp0_status_write(cp0_status_read() | (ipl & cp0_status_ie_enabled_bit)); |
1 | jermar | 85 | } |
86 | |||
413 | jermar | 87 | /** Read interrupt priority level. |
88 | * |
||
89 | * @return Current interrupt priority level. |
||
90 | */ |
||
91 | ipl_t interrupts_read(void) |
||
1 | jermar | 92 | { |
125 | jermar | 93 | return cp0_status_read(); |
1 | jermar | 94 | } |
95 | |||
332 | palkovsky | 96 | void interrupt(struct exception_regdump *pstate) |
1 | jermar | 97 | { |
98 | __u32 cause; |
||
124 | decky | 99 | int i; |
100 | |||
1 | jermar | 101 | /* decode interrupt number and process the interrupt */ |
124 | decky | 102 | cause = (cp0_cause_read() >> 8) &0xff; |
103 | |||
104 | for (i = 0; i < 8; i++) { |
||
105 | if (cause & (1 << i)) { |
||
106 | switch (i) { |
||
107 | case 0: /* SW0 - Software interrupt 0 */ |
||
332 | palkovsky | 108 | cp0_cause_write(cp0_cause_read() & ~(1 << 8)); /* clear SW0 interrupt */ |
124 | decky | 109 | break; |
110 | case 1: /* SW1 - Software interrupt 1 */ |
||
332 | palkovsky | 111 | cp0_cause_write(cp0_cause_read() & ~(1 << 9)); /* clear SW1 interrupt */ |
124 | decky | 112 | break; |
113 | case 2: /* IRQ0 */ |
||
509 | jermar | 114 | case KEYBOARD_IRQ: |
115 | keyboard(); |
||
116 | break; |
||
124 | decky | 117 | case 4: /* IRQ2 */ |
118 | case 5: /* IRQ3 */ |
||
119 | case 6: /* IRQ4 */ |
||
483 | jermar | 120 | default: |
332 | palkovsky | 121 | print_regdump(pstate); |
124 | decky | 122 | panic("unhandled interrupt %d\n", i); |
123 | break; |
||
509 | jermar | 124 | case TIMER_IRQ: |
329 | palkovsky | 125 | /* clear timer interrupt & set new */ |
126 | cp0_compare_write(cp0_count_read() + cp0_compare_value); |
||
124 | decky | 127 | clock(); |
567 | palkovsky | 128 | keyboard_poll(); |
124 | decky | 129 | break; |
130 | } |
||
131 | } |
||
132 | } |
||
1 | jermar | 133 | |
134 | } |