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4a9cbbe8 WD |
1 | /* |
2 | * (C) Copyright 2000-2002 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * Rob Taylor, Flying Pig Systems. robt@flyingpig.com | |
5 | * | |
6 | * See file CREDITS for list of people who contributed to this | |
7 | * project. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation; either version 2 of | |
12 | * the License, or (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
22 | * MA 02111-1307 USA | |
23 | */ | |
24 | ||
25 | #include <common.h> | |
26 | #include <mpc824x.h> | |
27 | #include <asm/processor.h> | |
28 | #include <asm/pci_io.h> | |
29 | #include <commproc.h> | |
30 | #include "drivers/epic.h" | |
31 | ||
a8c7c708 | 32 | int interrupt_init_cpu (unsigned *decrementer_count) |
4a9cbbe8 | 33 | { |
6d0f6bcf | 34 | *decrementer_count = (get_bus_freq (0) / 4) / CONFIG_SYS_HZ; |
4a9cbbe8 | 35 | |
8bde7f77 WD |
36 | /* |
37 | * It's all broken at the moment and I currently don't need | |
38 | * interrupts. If you want to fix it, have a look at the epic | |
39 | * drivers in dink32 v12. They do everthing and Motorola said | |
40 | * I could use the dink source in this project as long as | |
41 | * copyright notices remain intact. | |
4a9cbbe8 WD |
42 | */ |
43 | ||
44 | epicInit (EPIC_DIRECT_IRQ, 0); | |
7c7a23bd WD |
45 | /* EPIC won't generate INT unless Current Task Pri < 15 */ |
46 | epicCurTaskPrioSet(0); | |
4a9cbbe8 | 47 | |
4a9cbbe8 WD |
48 | return (0); |
49 | } | |
50 | ||
51 | /****************************************************************************/ | |
52 | ||
53 | /* | |
54 | * Handle external interrupts | |
55 | */ | |
56 | void external_interrupt (struct pt_regs *regs) | |
57 | { | |
58 | register unsigned long temp; | |
59 | ||
6d0f6bcf | 60 | pci_readl (CONFIG_SYS_EUMB_ADDR + EPIC_PROC_INT_ACK_REG, temp); |
4a9cbbe8 WD |
61 | sync (); /* i'm not convinced this is needed, but dink source has it */ |
62 | temp &= 0xff; /*get vector */ | |
63 | ||
64 | /*TODO: handle them -... */ | |
65 | epicEOI (); | |
66 | } | |
67 | ||
68 | /****************************************************************************/ | |
69 | ||
70 | /* | |
71 | * blank int handlers. | |
72 | */ | |
73 | ||
74 | void | |
75 | irq_install_handler (int vec, interrupt_handler_t * handler, void *arg) | |
76 | { | |
77 | } | |
78 | ||
79 | void irq_free_handler (int vec) | |
80 | { | |
81 | ||
82 | } | |
83 | ||
84 | /*TODO: some handlers for winbond and 87308 interrupts | |
85 | and what about generic pci inteerupts? | |
86 | vga? | |
87 | */ | |
88 | ||
59543fe0 | 89 | void timer_interrupt_cpu (struct pt_regs *regs) |
4a9cbbe8 | 90 | { |
a8c7c708 WD |
91 | /* nothing to do here */ |
92 | return; | |
4a9cbbe8 | 93 | } |