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 outb(c, PORT_BIOS_DEBUG);
35 // Write a string to the framebuffer.
37 puts(u16 action, const char *s)
43 // Write a string to the framebuffer.
45 puts_cs(u16 action, const char *s)
48 char c = GET_VAR(CS, *(u8*)s);
55 // Write an unsigned integer to the screen.
57 putuint(u16 action, u32 val)
60 char *d = &buf[sizeof(buf) - 1];
63 *d = (val % 10) + '0';
72 // Write a single digit hex character to the screen.
74 putsinglehex(u16 action, u32 val)
83 // Write an integer in hexadecimal to the screen.
85 puthex(u16 action, u32 val)
87 putsinglehex(action, (val >> 28) & 0xf);
88 putsinglehex(action, (val >> 24) & 0xf);
89 putsinglehex(action, (val >> 20) & 0xf);
90 putsinglehex(action, (val >> 16) & 0xf);
91 putsinglehex(action, (val >> 12) & 0xf);
92 putsinglehex(action, (val >> 8) & 0xf);
93 putsinglehex(action, (val >> 4) & 0xf);
94 putsinglehex(action, (val >> 0) & 0xf);
104 bvprintf(u16 action, const char *fmt, va_list args)
108 char c = GET_VAR(CS, *(u8*)s);
117 c = GET_VAR(CS, *(u8*)n);
123 // Ignore long format indicator
125 c = GET_VAR(CS, *(u8*)n);
134 val = va_arg(args, s32);
139 putuint(action, val);
142 val = va_arg(args, s32);
143 putuint(action, val);
147 val = va_arg(args, s32);
151 val = va_arg(args, int);
155 // Hack to support "%.s" - meaning string on stack.
156 if (GET_VAR(CS, *(u8*)(n+1)) != 's')
159 sarg = va_arg(args, const char *);
163 sarg = va_arg(args, const char *);
164 puts_cs(action, sarg);
175 BX_PANIC(const char *fmt, ...)
179 bvprintf(0, fmt, args);
182 // XXX - use PANIC PORT.
189 BX_INFO(const char *fmt, ...)
193 bvprintf(0, fmt, args);
198 printf(const char *fmt, ...)
202 bvprintf(1, fmt, args);
207 dump_regs(const char *fname, const char *type, struct bregs *regs)
210 BX_INFO("%s %s: NULL\n", type, fname);
213 BX_INFO("%s %s: a=%x b=%x c=%x d=%x si=%x di=%x\n"
214 , type, fname, regs->eax, regs->ebx, regs->ecx, regs->edx
215 , regs->esi, regs->edi);
216 BX_INFO(" ds=%x es=%x ip=%x cs=%x f=%x r=%p\n"
217 , regs->ds, regs->es, regs->ip, regs->cs, regs->flags, regs);
221 __debug_isr(const char *fname)
227 // Function called on handler startup.
229 __debug_enter(const char *fname, struct bregs *regs)
231 // XXX - implement run time suppression test
232 dump_regs(fname, "enter", regs);
236 __debug_fail(const char *fname, struct bregs *regs)
238 dump_regs(fname, "fail", regs);
242 __debug_stub(const char *fname, struct bregs *regs)
244 dump_regs(fname, "stub", regs);