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
17 memset(&br, 0, sizeof(br));
20 call16_int(0x10, &br);
23 // Write a charcter to the framebuffer.
25 putc(u16 action, char c)
27 if (CONFIG_DEBUG_LEVEL) {
28 if (! CONFIG_COREBOOT)
29 // Send character to debug port.
30 outb(c, PORT_BIOS_DEBUG);
31 if (CONFIG_DEBUG_SERIAL)
32 // Send character to serial port.
37 // Send character to video screen.
44 // Write a string to the framebuffer.
46 puts(u16 action, const char *s)
52 // Write a string to the framebuffer.
54 puts_cs(u16 action, const char *s)
57 char c = GET_VAR(CS, *(u8*)s);
64 // Write an unsigned integer to the screen.
66 putuint(u16 action, u32 val)
69 char *d = &buf[sizeof(buf) - 1];
72 *d = (val % 10) + '0';
81 // Write a single digit hex character to the screen.
83 putsinglehex(u16 action, u32 val)
92 // Write an integer in hexadecimal to the screen.
94 puthex(u16 action, u32 val)
96 putsinglehex(action, (val >> 28) & 0xf);
97 putsinglehex(action, (val >> 24) & 0xf);
98 putsinglehex(action, (val >> 20) & 0xf);
99 putsinglehex(action, (val >> 16) & 0xf);
100 putsinglehex(action, (val >> 12) & 0xf);
101 putsinglehex(action, (val >> 8) & 0xf);
102 putsinglehex(action, (val >> 4) & 0xf);
103 putsinglehex(action, (val >> 0) & 0xf);
113 bvprintf(u16 action, const char *fmt, va_list args)
117 char c = GET_VAR(CS, *(u8*)s);
126 c = GET_VAR(CS, *(u8*)n);
132 // Ignore long format indicator
134 c = GET_VAR(CS, *(u8*)n);
143 val = va_arg(args, s32);
148 putuint(action, val);
151 val = va_arg(args, s32);
152 putuint(action, val);
156 val = va_arg(args, s32);
160 val = va_arg(args, int);
164 // Hack to support "%.s" - meaning string on stack.
165 if (GET_VAR(CS, *(u8*)(n+1)) != 's')
168 sarg = va_arg(args, const char *);
172 sarg = va_arg(args, const char *);
173 puts_cs(action, sarg);
184 BX_PANIC(const char *fmt, ...)
188 bvprintf(0, fmt, args);
191 // XXX - use PANIC PORT.
198 __dprintf(const char *fmt, ...)
202 bvprintf(0, fmt, args);
207 printf(const char *fmt, ...)
211 bvprintf(1, fmt, args);
216 dump_regs(const char *fname, const char *type, struct bregs *regs)
219 __dprintf("%s %s: NULL\n", type, fname);
222 __dprintf("%s %s: a=%x b=%x c=%x d=%x si=%x di=%x\n"
223 , type, fname, regs->eax, regs->ebx, regs->ecx, regs->edx
224 , regs->esi, regs->edi);
225 __dprintf(" ds=%x es=%x ip=%x cs=%x f=%x r=%p\n"
226 , regs->ds, regs->es, regs->ip, regs->cs, regs->flags, regs);
230 __debug_isr(const char *fname)
236 // Function called on handler startup.
238 __debug_enter(const char *fname, struct bregs *regs)
240 // XXX - implement run time suppression test
241 dump_regs(fname, "enter", regs);
245 __debug_fail(const char *fname, struct bregs *regs)
247 dump_regs(fname, "fail", regs);
251 __debug_stub(const char *fname, struct bregs *regs)
253 dump_regs(fname, "stub", regs);