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 LGPLv3 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_*
13 #include "biosvar.h" // GET_GLOBAL
15 #define DEBUG_PORT PORT_SERIAL1
16 #define DEBUG_TIMEOUT 100000
21 if (!CONFIG_DEBUG_SERIAL)
23 // setup for serial logging: 8N1
24 u8 oldparam, newparam = 0x03;
25 oldparam = inb(DEBUG_PORT+SEROFF_LCR);
26 outb(newparam, DEBUG_PORT+SEROFF_LCR);
28 u8 oldier, newier = 0;
29 oldier = inb(DEBUG_PORT+SEROFF_IER);
30 outb(newier, DEBUG_PORT+SEROFF_IER);
32 if (oldparam != newparam || oldier != newier)
33 dprintf(1, "Changing serial settings was %x/%x now %x/%x\n"
34 , oldparam, oldier, newparam, newier);
37 // Write a character to the serial port.
41 int timeout = DEBUG_TIMEOUT;
42 while ((inb(DEBUG_PORT+SEROFF_LSR) & 0x60) != 0x60)
46 outb(c, DEBUG_PORT+SEROFF_DATA);
49 // Show a character on the screen.
54 // printf is only used in 32bit code.
57 memset(&br, 0, sizeof(br));
60 call16_int(0x10, &br);
63 // Output a character.
65 putc(u16 action, char c)
67 if (CONFIG_DEBUG_LEVEL) {
68 if (! CONFIG_COREBOOT)
69 // Send character to debug port.
70 outb(c, PORT_BIOS_DEBUG);
71 if (CONFIG_DEBUG_SERIAL) {
72 // Send character to serial port.
80 // Send character to video screen.
89 puts(u16 action, const char *s)
95 // Output a string that is in the CS segment.
97 puts_cs(u16 action, const char *s)
100 char c = GET_GLOBAL(*(u8*)s);
107 // Output an unsigned integer.
109 putuint(u16 action, u32 val)
112 char *d = &buf[sizeof(buf) - 1];
115 *d = (val % 10) + '0';
124 // Output a single digit hex character.
126 putsinglehex(u16 action, u32 val)
131 val = 'a' + val - 10;
135 // Output an integer in hexadecimal.
137 puthex(u16 action, u32 val, int width)
155 default: putsinglehex(action, (val >> 28) & 0xf);
156 case 7: putsinglehex(action, (val >> 24) & 0xf);
157 case 6: putsinglehex(action, (val >> 20) & 0xf);
158 case 5: putsinglehex(action, (val >> 16) & 0xf);
159 case 4: putsinglehex(action, (val >> 12) & 0xf);
160 case 3: putsinglehex(action, (val >> 8) & 0xf);
161 case 2: putsinglehex(action, (val >> 4) & 0xf);
162 case 1: putsinglehex(action, (val >> 0) & 0xf);
169 return ((u8)(c - '0')) < 10;
173 bvprintf(u16 action, const char *fmt, va_list args)
177 char c = GET_GLOBAL(*(u8*)s);
187 c = GET_GLOBAL(*(u8*)n);
190 field_width = field_width * 10 + c - '0';
194 // Ignore long format indicator
196 c = GET_GLOBAL(*(u8*)n);
205 val = va_arg(args, s32);
210 putuint(action, val);
213 val = va_arg(args, s32);
214 putuint(action, val);
217 /* %p always has 0x prepended */
222 val = va_arg(args, s32);
223 puthex(action, val, field_width);
226 val = va_arg(args, int);
230 // Hack to support "%.s" - meaning string on stack.
231 if (GET_GLOBAL(*(u8*)(n+1)) != 's')
234 sarg = va_arg(args, const char *);
238 sarg = va_arg(args, const char *);
239 puts_cs(action, sarg);
250 panic(const char *fmt, ...)
252 if (CONFIG_DEBUG_LEVEL) {
255 bvprintf(0, fmt, args);
259 // XXX - use PANIC PORT.
266 __dprintf(const char *fmt, ...)
270 bvprintf(0, fmt, args);
275 printf(const char *fmt, ...)
279 bvprintf(1, fmt, args);
284 hexdump(void *d, int len)
288 if (count % 8 == 0) {
290 puthex(0, count*4, 8);
295 puthex(0, *(u32*)d, 8);
304 dump_regs(struct bregs *regs)
307 dprintf(1, " NULL\n");
310 dprintf(1, " a=%08x b=%08x c=%08x d=%08x si=%08x di=%08x\n"
311 , regs->eax, regs->ebx, regs->ecx, regs->edx
312 , regs->esi, regs->edi);
313 dprintf(1, " ds=%08x es=%08x ip=%08x cs=%08x f=%08x r=%08x\n"
314 , regs->ds, regs->es, regs->ip, regs->cs, regs->flags, (u32)regs);
317 // Report entry to an Interrupt Service Routine (ISR).
319 __debug_isr(const char *fname)
325 // Function called on handler startup.
327 __debug_enter(struct bregs *regs, const char *fname)
329 dprintf(1, "enter %s:\n", fname);
333 // Send debugging output info.
335 __debug_stub(struct bregs *regs, int lineno, const char *fname)
337 dprintf(1, "stub %s:%d:\n", fname, lineno);
341 // Report on a handler returning a failure notification to the caller.
343 __set_fail(struct bregs *regs, int lineno, const char *fname)
345 dprintf(1, "fail %s:%d:\n", fname, lineno);
347 set_fail_silent(regs);
350 // Report on a handler returning a failure code to the caller. Note,
351 // the lineno and return code are encoded in the same parameter as gcc
352 // does a better job of scheduling function calls when there are 3 or
355 __set_code_fail(struct bregs *regs, u32 linecode, const char *fname)
358 u32 lineno = linecode >> 8;
359 dprintf(1, "fail %s:%d(%x):\n", fname, lineno, code);
361 set_code_fail_silent(regs, code);