1 // Raw screen writing 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 "biosvar.h" // struct bregs
13 #define DEBUG_PORT 0x03f8
14 #define DEBUG_TIMEOUT 100000
19 if (!CONFIG_DEBUG_SERIAL)
21 // setup for serial logging: 8N1
22 u8 oldparam, newparam = 0x03;
23 oldparam = inb(DEBUG_PORT+3);
24 outb(newparam, DEBUG_PORT+3);
26 u8 oldier, newier = 0;
27 oldier = inb(DEBUG_PORT+1);
28 outb(newier, DEBUG_PORT+1);
30 if (oldparam != newparam || oldier != newier)
31 dprintf(1, "Changing serial settings was %x/%x now %x/%x\n"
32 , oldparam, oldier, newparam, newier);
38 int timeout = DEBUG_TIMEOUT;
39 while ((inb(DEBUG_PORT+5) & 0x60) != 0x60)
50 memset(&br, 0, sizeof(br));
53 call16_int(0x10, &br);
56 // Write a charcter to the framebuffer.
58 putc(u16 action, char c)
60 if (CONFIG_DEBUG_LEVEL) {
61 if (! CONFIG_COREBOOT)
62 // Send character to debug port.
63 outb(c, PORT_BIOS_DEBUG);
64 if (CONFIG_DEBUG_SERIAL) {
65 // Send character to serial port.
73 // Send character to video screen.
80 // Write a string to the framebuffer.
82 puts(u16 action, const char *s)
88 // Write a string to the framebuffer.
90 puts_cs(u16 action, const char *s)
93 char c = GET_VAR(CS, *(u8*)s);
100 // Write an unsigned integer to the screen.
102 putuint(u16 action, u32 val)
105 char *d = &buf[sizeof(buf) - 1];
108 *d = (val % 10) + '0';
117 // Write a single digit hex character to the screen.
119 putsinglehex(u16 action, u32 val)
124 val = 'a' + val - 10;
128 // Write an integer in hexadecimal to the screen.
130 puthex(u16 action, u32 val)
132 putsinglehex(action, (val >> 28) & 0xf);
133 putsinglehex(action, (val >> 24) & 0xf);
134 putsinglehex(action, (val >> 20) & 0xf);
135 putsinglehex(action, (val >> 16) & 0xf);
136 putsinglehex(action, (val >> 12) & 0xf);
137 putsinglehex(action, (val >> 8) & 0xf);
138 putsinglehex(action, (val >> 4) & 0xf);
139 putsinglehex(action, (val >> 0) & 0xf);
149 bvprintf(u16 action, const char *fmt, va_list args)
153 char c = GET_VAR(CS, *(u8*)s);
162 c = GET_VAR(CS, *(u8*)n);
168 // Ignore long format indicator
170 c = GET_VAR(CS, *(u8*)n);
179 val = va_arg(args, s32);
184 putuint(action, val);
187 val = va_arg(args, s32);
188 putuint(action, val);
192 val = va_arg(args, s32);
196 val = va_arg(args, int);
200 // Hack to support "%.s" - meaning string on stack.
201 if (GET_VAR(CS, *(u8*)(n+1)) != 's')
204 sarg = va_arg(args, const char *);
208 sarg = va_arg(args, const char *);
209 puts_cs(action, sarg);
220 BX_PANIC(const char *fmt, ...)
224 bvprintf(0, fmt, args);
227 // XXX - use PANIC PORT.
234 __dprintf(const char *fmt, ...)
238 bvprintf(0, fmt, args);
243 printf(const char *fmt, ...)
247 bvprintf(1, fmt, args);
252 dump_regs(const char *fname, const char *type, struct bregs *regs)
255 dprintf(1, "%s %s: NULL\n", type, fname);
258 dprintf(1, "%s %s: a=%x b=%x c=%x d=%x si=%x di=%x\n"
259 , type, fname, regs->eax, regs->ebx, regs->ecx, regs->edx
260 , regs->esi, regs->edi);
261 dprintf(1, " ds=%x es=%x ip=%x cs=%x f=%x r=%p\n"
262 , regs->ds, regs->es, regs->ip, regs->cs, regs->flags, regs);
266 __debug_isr(const char *fname)
272 // Function called on handler startup.
274 __debug_enter(const char *fname, struct bregs *regs)
276 // XXX - implement run time suppression test
277 dump_regs(fname, "enter", regs);
281 __debug_fail(const char *fname, struct bregs *regs)
283 dump_regs(fname, "fail", regs);
287 __debug_stub(const char *fname, struct bregs *regs)
289 dump_regs(fname, "stub", regs);