2009-12-13 Vladimir Serbinenko <phcoder@gmail.com>
* docs/kernel.c.texi: Removed. It's autogenerated. * docs/multiboot.h.texi: Likewise. * docs/version.texi: Likewise.
This commit is contained in:
Vladimir 'phcoder' Serbinenko
parent
39469c9282
commit
6b23355545
4 changed files with 6 additions and 407 deletions
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/* @r{kernel.c - the C part of the kernel} */
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/* @r{Copyright (C) 1999 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.} */
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#include <multiboot.h>
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/* @r{Macros.} */
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/* @r{Check if the bit BIT in FLAGS is set.} */
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#define CHECK_FLAG(flags,bit) ((flags) & (1 << (bit)))
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/* @r{Some screen stuff.} */
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/* @r{The number of columns.} */
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#define COLUMNS 80
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/* @r{The number of lines.} */
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#define LINES 24
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/* @r{The attribute of an character.} */
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#define ATTRIBUTE 7
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/* @r{The video memory address.} */
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#define VIDEO 0xB8000
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/* @r{Variables.} */
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/* @r{Save the X position.} */
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static int xpos;
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/* @r{Save the Y position.} */
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static int ypos;
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/* @r{Point to the video memory.} */
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static volatile unsigned char *video;
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/* @r{Forward declarations.} */
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void cmain (unsigned long magic, unsigned long addr);
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static void cls (void);
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static void itoa (char *buf, int base, int d);
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static void putchar (int c);
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void printf (const char *format, ...);
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/* @r{Check if MAGIC is valid and print the Multiboot information structure
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pointed by ADDR.} */
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void
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cmain (unsigned long magic, unsigned long addr)
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@{
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multiboot_info_t *mbi;
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/* @r{Clear the screen.} */
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cls ();
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/* @r{Am I booted by a Multiboot-compliant boot loader?} */
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if (magic != MULTIBOOT_BOOTLOADER_MAGIC)
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@{
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printf ("Invalid magic number: 0x%x\n", (unsigned) magic);
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return;
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@}
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/* @r{Set MBI to the address of the Multiboot information structure.} */
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mbi = (multiboot_info_t *) addr;
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/* @r{Print out the flags.} */
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printf ("flags = 0x%x\n", (unsigned) mbi->flags);
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/* @r{Are mem_* valid?} */
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if (CHECK_FLAG (mbi->flags, 0))
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printf ("mem_lower = %uKB, mem_upper = %uKB\n",
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(unsigned) mbi->mem_lower, (unsigned) mbi->mem_upper);
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/* @r{Is boot_device valid?} */
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if (CHECK_FLAG (mbi->flags, 1))
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printf ("boot_device = 0x%x\n", (unsigned) mbi->boot_device);
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/* @r{Is the command line passed?} */
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if (CHECK_FLAG (mbi->flags, 2))
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printf ("cmdline = %s\n", (char *) mbi->cmdline);
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/* @r{Are mods_* valid?} */
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if (CHECK_FLAG (mbi->flags, 3))
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@{
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module_t *mod;
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int i;
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printf ("mods_count = %d, mods_addr = 0x%x\n",
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(int) mbi->mods_count, (int) mbi->mods_addr);
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for (i = 0, mod = (module_t *) mbi->mods_addr;
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i < mbi->mods_count;
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i++, mod++)
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printf (" mod_start = 0x%x, mod_end = 0x%x, string = %s\n",
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(unsigned) mod->mod_start,
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(unsigned) mod->mod_end,
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(char *) mod->string);
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@}
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/* @r{Bits 4 and 5 are mutually exclusive!} */
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if (CHECK_FLAG (mbi->flags, 4) && CHECK_FLAG (mbi->flags, 5))
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@{
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printf ("Both bits 4 and 5 are set.\n");
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return;
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@}
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/* @r{Is the symbol table of a.out valid?} */
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if (CHECK_FLAG (mbi->flags, 4))
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@{
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aout_symbol_table_t *aout_sym = &(mbi->u.aout_sym);
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printf ("aout_symbol_table: tabsize = 0x%0x, "
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"strsize = 0x%x, addr = 0x%x\n",
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(unsigned) aout_sym->tabsize,
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(unsigned) aout_sym->strsize,
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(unsigned) aout_sym->addr);
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@}
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/* @r{Is the section header table of ELF valid?} */
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if (CHECK_FLAG (mbi->flags, 5))
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@{
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elf_section_header_table_t *elf_sec = &(mbi->u.elf_sec);
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printf ("elf_sec: num = %u, size = 0x%x,"
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" addr = 0x%x, shndx = 0x%x\n",
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(unsigned) elf_sec->num, (unsigned) elf_sec->size,
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(unsigned) elf_sec->addr, (unsigned) elf_sec->shndx);
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@}
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/* @r{Are mmap_* valid?} */
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if (CHECK_FLAG (mbi->flags, 6))
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@{
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memory_map_t *mmap;
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printf ("mmap_addr = 0x%x, mmap_length = 0x%x\n",
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(unsigned) mbi->mmap_addr, (unsigned) mbi->mmap_length);
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for (mmap = (memory_map_t *) mbi->mmap_addr;
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(unsigned long) mmap < mbi->mmap_addr + mbi->mmap_length;
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mmap = (memory_map_t *) ((unsigned long) mmap
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+ mmap->size + sizeof (mmap->size)))
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printf (" size = 0x%x, base_addr = 0x%x%x,"
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" length = 0x%x%x, type = 0x%x\n",
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(unsigned) mmap->size,
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(unsigned) mmap->base_addr_high,
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(unsigned) mmap->base_addr_low,
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(unsigned) mmap->length_high,
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(unsigned) mmap->length_low,
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(unsigned) mmap->type);
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@}
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@}
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/* @r{Clear the screen and initialize VIDEO, XPOS and YPOS.} */
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static void
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cls (void)
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@{
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int i;
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video = (unsigned char *) VIDEO;
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for (i = 0; i < COLUMNS * LINES * 2; i++)
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*(video + i) = 0;
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xpos = 0;
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ypos = 0;
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@}
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/* @r{Convert the integer D to a string and save the string in BUF. If
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BASE is equal to 'd', interpret that D is decimal, and if BASE is
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equal to 'x', interpret that D is hexadecimal.} */
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static void
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itoa (char *buf, int base, int d)
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@{
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char *p = buf;
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char *p1, *p2;
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unsigned long ud = d;
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int divisor = 10;
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/* @r{If %d is specified and D is minus, put `-' in the head.} */
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if (base == 'd' && d < 0)
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@{
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*p++ = '-';
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buf++;
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ud = -d;
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@}
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else if (base == 'x')
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divisor = 16;
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/* @r{Divide UD by DIVISOR until UD == 0.} */
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do
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@{
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int remainder = ud % divisor;
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*p++ = (remainder < 10) ? remainder + '0' : remainder + 'a' - 10;
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@}
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while (ud /= divisor);
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/* @r{Terminate BUF.} */
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*p = 0;
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/* @r{Reverse BUF.} */
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p1 = buf;
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p2 = p - 1;
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while (p1 < p2)
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@{
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char tmp = *p1;
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*p1 = *p2;
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*p2 = tmp;
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p1++;
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p2--;
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@}
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@}
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/* @r{Put the character C on the screen.} */
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static void
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putchar (int c)
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@{
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if (c == '\n' || c == '\r')
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@{
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newline:
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xpos = 0;
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ypos++;
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if (ypos >= LINES)
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ypos = 0;
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return;
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@}
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*(video + (xpos + ypos * COLUMNS) * 2) = c & 0xFF;
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*(video + (xpos + ypos * COLUMNS) * 2 + 1) = ATTRIBUTE;
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xpos++;
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if (xpos >= COLUMNS)
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goto newline;
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@}
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/* @r{Format a string and print it on the screen, just like the libc
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function printf.} */
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void
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printf (const char *format, ...)
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@{
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char **arg = (char **) &format;
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int c;
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char buf[20];
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arg++;
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while ((c = *format++) != 0)
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@{
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if (c != '%')
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putchar (c);
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else
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@{
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char *p;
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c = *format++;
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switch (c)
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@{
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case 'd':
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case 'u':
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case 'x':
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itoa (buf, c, *((int *) arg++));
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p = buf;
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goto string;
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break;
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case 's':
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p = *arg++;
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if (! p)
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p = "(null)";
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string:
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while (*p)
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putchar (*p++);
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break;
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default:
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putchar (*((int *) arg++));
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break;
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@}
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@}
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@}
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@}
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@ -1,119 +0,0 @@
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/* @r{multiboot.h - the header for Multiboot} */
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/* @r{Copyright (C) 1999, 2001 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.} */
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/* @r{Macros.} */
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/* @r{The magic number for the Multiboot header.} */
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#define MULTIBOOT_HEADER_MAGIC 0x1BADB002
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/* @r{The flags for the Multiboot header.} */
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#ifdef __ELF__
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# define MULTIBOOT_HEADER_FLAGS 0x00000003
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#else
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# define MULTIBOOT_HEADER_FLAGS 0x00010003
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#endif
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/* @r{The magic number passed by a Multiboot-compliant boot loader.} */
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#define MULTIBOOT_BOOTLOADER_MAGIC 0x2BADB002
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/* @r{The size of our stack (16KB).} */
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#define STACK_SIZE 0x4000
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/* @r{C symbol format. HAVE_ASM_USCORE is defined by configure.} */
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#ifdef HAVE_ASM_USCORE
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# define EXT_C(sym) _ ## sym
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#else
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# define EXT_C(sym) sym
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#endif
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#ifndef ASM
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/* @r{Do not include here in boot.S.} */
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/* @r{Types.} */
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/* @r{The Multiboot header.} */
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typedef struct multiboot_header
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@{
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unsigned long magic;
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unsigned long flags;
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unsigned long checksum;
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unsigned long header_addr;
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unsigned long load_addr;
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unsigned long load_end_addr;
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unsigned long bss_end_addr;
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unsigned long entry_addr;
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@} multiboot_header_t;
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/* @r{The symbol table for a.out.} */
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typedef struct aout_symbol_table
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@{
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unsigned long tabsize;
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unsigned long strsize;
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unsigned long addr;
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unsigned long reserved;
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@} aout_symbol_table_t;
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/* @r{The section header table for ELF.} */
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typedef struct elf_section_header_table
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@{
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unsigned long num;
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unsigned long size;
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unsigned long addr;
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unsigned long shndx;
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@} elf_section_header_table_t;
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/* @r{The Multiboot information.} */
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typedef struct multiboot_info
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@{
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unsigned long flags;
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unsigned long mem_lower;
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unsigned long mem_upper;
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unsigned long boot_device;
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unsigned long cmdline;
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unsigned long mods_count;
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unsigned long mods_addr;
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union
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@{
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aout_symbol_table_t aout_sym;
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elf_section_header_table_t elf_sec;
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@} u;
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unsigned long mmap_length;
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unsigned long mmap_addr;
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@} multiboot_info_t;
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/* @r{The module structure.} */
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typedef struct module
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@{
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unsigned long mod_start;
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unsigned long mod_end;
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unsigned long string;
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unsigned long reserved;
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@} module_t;
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/* @r{The memory map. Be careful that the offset 0 is base_addr_low
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but no size.} */
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typedef struct memory_map
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@{
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unsigned long size;
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unsigned long base_addr_low;
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unsigned long base_addr_high;
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unsigned long length_low;
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unsigned long length_high;
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unsigned long type;
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@} memory_map_t;
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#endif /* @r{! ASM} */
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@ -1,4 +0,0 @@
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@set UPDATED 8 May 2005
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@set UPDATED-MONTH May 2005
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@set EDITION 0.97
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@set VERSION 0.97
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