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1.1 root 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: * file: pe_kprintf.c
24: * PPC platform expert debugging output initialization.
25: */
26: #include <stdarg.h>
27: #include <pexpert/protos.h>
28: #include <pexpert/pexpert.h>
29: #include <pexpert/ppc/powermac.h>
30: #include <kern/debug.h>
31: #include <kern/simple_lock.h>
32:
33: /* extern references */
34: extern void init_display_putc(unsigned char*, int, int);
35: extern void display_putc(char c);
36: extern int scc_putc(int unit, int line, int c);
37: extern void cnputc(char c);
38:
39: /* Internal routines -- eventually put this in serial driver */
40: void serial_putc(char c);
41:
42: /* Globals */
43: void (*PE_kputc)(char c) = 0;
44:
45: unsigned int disableSerialOuput = TRUE;
46:
47:
48: static struct slock kprintf_lock;
49:
50: void PE_init_kprintf(boolean_t vm_initialized)
51: {
52: static vm_offset_t scc;
53: unsigned int boot_arg;
54:
55: if (PE_state.initialized == FALSE)
56: panic("Platform Expert not initialized");
57:
58: if (!vm_initialized)
59: {
60: if (PE_parse_boot_arg("debug", &boot_arg))
61: if(boot_arg & DB_KPRT) disableSerialOuput = FALSE;
62:
63: if( (scc = PE_find_scc()))
64: {
65: initialize_serial( (void *) scc );
66: PE_kputc = serial_putc;
67:
68: simple_lock_init(&kprintf_lock, 0);
69: } else
70: PE_kputc = cnputc;
71:
72: } else if( scc){
73: initialize_serial( (void *) io_map( scc, 0x1000) );
74: }
75:
76: #if 0
77: /*
78: * FUTURE: eventually let the boot command determine where
79: * the debug output will be, serial, video, etc.
80: */
81: switch (PE_state.debug_video.v_display) {
82: case kDebugTypeSerial:
83: PE_kputc = serial_putc;
84: break;
85:
86: case kDebugTypeDisplay:
87: init_display_putc( (unsigned char*)PE_state.debug_video.v_baseAddr,
88: PE_state.debug_video.v_rowBytes,
89: PE_state.debug_video.v_height);
90: PE_kputc = display_putc;
91: break;
92:
93: default:
94: PE_state.debug_video.v_baseAddr = 0;
95: }
96: #endif
97: }
98:
99: void serial_putc(char c)
100: {
101: (void) scc_putc(0, 1, c);
102: if (c == '\n') (void) scc_putc(0, 1, '\r');
103:
104: #if 0
105: (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, c);
106: if (c == '\n') (void) scc_putc(0, (int)PE_state.debug_video.v_baseAddr, '\r');
107: #endif
108: }
109:
110: void kprintf(const char *fmt, ...)
111: {
112: va_list listp;
113: boolean_t state;
114:
115: state = ml_set_interrupts_enabled(FALSE);
116: simple_lock(&kprintf_lock);
117:
118: if (!disableSerialOuput) {
119: va_start(listp, fmt);
120: _doprnt(fmt, &listp, PE_kputc, 16);
121: va_end(listp);
122: }
123:
124: simple_unlock(&kprintf_lock);
125: ml_set_interrupts_enabled(state);
126: }
127:
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