1 // Raw screen writing and debug output code.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
5 // This file may be distributed under the terms of the GNU GPLv3 license.
7 #include <stdarg.h> // va_list
9 #include "farptr.h" // GET_VAR
10 #include "util.h" // printf
11 #include "bregs.h" // struct bregs
12 #include "config.h" // CONFIG_*
14 #define DEBUG_PORT 0x03f8
15 #define DEBUG_TIMEOUT 100000
20 if (!CONFIG_DEBUG_SERIAL)
22 // setup for serial logging: 8N1
23 u8 oldparam, newparam = 0x03;
24 oldparam = inb(DEBUG_PORT+3);
25 outb(newparam, DEBUG_PORT+3);
27 u8 oldier, newier = 0;
28 oldier = inb(DEBUG_PORT+1);
29 outb(newier, DEBUG_PORT+1);
31 if (oldparam != newparam || oldier != newier)
32 dprintf(1, "Changing serial settings was %x/%x now %x/%x\n"
33 , oldparam, oldier, newparam, newier);
36 // Write a character to the serial port.
40 int timeout = DEBUG_TIMEOUT;
41 while ((inb(DEBUG_PORT+5) & 0x60) != 0x60)
48 // Show a character on the screen.
53 // printf is only used in 32bit code.
56 memset(&br, 0, sizeof(br));
59 call16_int(0x10, &br);
62 // Output a character.
64 putc(u16 action, char c)
66 if (CONFIG_DEBUG_LEVEL) {
67 if (! CONFIG_COREBOOT)
68 // Send character to debug port.
69 outb(c, PORT_BIOS_DEBUG);
70 if (CONFIG_DEBUG_SERIAL) {
71 // Send character to serial port.
79 // Send character to video screen.
88 puts(u16 action, const char *s)
94 // Output a string that is in the CS segment.
96 puts_cs(u16 action, const char *s)
99 char c = GET_VAR(CS, *(u8*)s);
106 // Output an unsigned integer.
108 putuint(u16 action, u32 val)
111 char *d = &buf[sizeof(buf) - 1];
114 *d = (val % 10) + '0';
123 // Output a single digit hex character.
125 putsinglehex(u16 action, u32 val)
130 val = 'a' + val - 10;
134 // Output an integer in hexadecimal.
136 puthex(u16 action, u32 val)
138 putsinglehex(action, (val >> 28) & 0xf);
139 putsinglehex(action, (val >> 24) & 0xf);
140 putsinglehex(action, (val >> 20) & 0xf);
141 putsinglehex(action, (val >> 16) & 0xf);
142 putsinglehex(action, (val >> 12) & 0xf);
143 putsinglehex(action, (val >> 8) & 0xf);
144 putsinglehex(action, (val >> 4) & 0xf);
145 putsinglehex(action, (val >> 0) & 0xf);
151 return ((u8)(c - '0')) < 10;
155 bvprintf(u16 action, const char *fmt, va_list args)
159 char c = GET_VAR(CS, *(u8*)s);
168 c = GET_VAR(CS, *(u8*)n);
174 // Ignore long format indicator
176 c = GET_VAR(CS, *(u8*)n);
185 val = va_arg(args, s32);
190 putuint(action, val);
193 val = va_arg(args, s32);
194 putuint(action, val);
198 val = va_arg(args, s32);
202 val = va_arg(args, int);
206 // Hack to support "%.s" - meaning string on stack.
207 if (GET_VAR(CS, *(u8*)(n+1)) != 's')
210 sarg = va_arg(args, const char *);
214 sarg = va_arg(args, const char *);
215 puts_cs(action, sarg);
226 BX_PANIC(const char *fmt, ...)
228 if (CONFIG_DEBUG_LEVEL) {
231 bvprintf(0, fmt, args);
235 // XXX - use PANIC PORT.
242 __dprintf(const char *fmt, ...)
246 bvprintf(0, fmt, args);
251 printf(const char *fmt, ...)
255 bvprintf(1, fmt, args);
260 dump_regs(struct bregs *regs)
263 dprintf(1, " NULL\n");
266 dprintf(1, " a=%x b=%x c=%x d=%x si=%x di=%x\n"
267 , regs->eax, regs->ebx, regs->ecx, regs->edx
268 , regs->esi, regs->edi);
269 dprintf(1, " ds=%x es=%x ip=%x cs=%x f=%x r=%p\n"
270 , regs->ds, regs->es, regs->ip, regs->cs, regs->flags, regs);
274 __debug_isr(const char *fname)
280 // Function called on handler startup.
282 __debug_enter(const char *fname, struct bregs *regs)
284 dprintf(1, "enter %s:\n", fname);
289 __debug_stub(const char *fname, int lineno, struct bregs *regs)
291 dprintf(1, "stub %s:%d:\n", fname, lineno);
296 __set_fail(const char *fname, int lineno, struct bregs *regs)
298 dprintf(1, "fail %s:%d:\n", fname, lineno);
300 set_fail_silent(regs);
304 __set_code_fail(const char *fname, int lineno, struct bregs *regs, u8 code)
306 dprintf(1, "fail %s:%d(%x):\n", fname, lineno, code);
308 set_code_fail_silent(regs, code);