memdisk/e820test.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2001-2008 H. Peter Anvin - All Rights Reserved
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
   8  *   Boston MA 02111-1307, USA; either version 2 of the License, or
   9  *   (at your option) any later version; incorporated herein by reference.
  10  *
  11  * ----------------------------------------------------------------------- */
  12
  13 /*
  14  * e820hack.c
  15  *
  16  * Test of INT 15:E820 canonicalization/manipulation routine
  17  */
  18
  19 #include <string.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <inttypes.h>
  23 #include "e820.h"
  24
  25 void *sys_bounce;               /* Dummy */
  26
  27 extern void parse_mem(void);
  28 extern uint32_t dos_mem, low_mem, high_mem;
  29
  30 void __attribute__((noreturn)) die(void)
  31 {
  32   abort();
  33 }
  34
  35 void printranges(void) {
  36   int i;
  37
  38   for ( i = 0 ; i < nranges ; i++ ) {
  39     printf("%016llx %016llx %d\n",
  40            ranges[i].start,
  41            ranges[i+1].start - ranges[i].start,
  42            ranges[i].type);
  43   }
  44 }
  45
  46 int main(void)
  47 {
  48   uint64_t start, len;
  49   uint32_t type;
  50   char line[BUFSIZ], *p;
  51
  52   e820map_init();
  53   printranges();
  54
  55   while ( fgets(line, BUFSIZ, stdin) ) {
  56     p = strchr(line, ':');
  57     p = p ? p+1 : line;
  58     if ( sscanf(p, " %llx %llx %d", &start, &len, &type) == 3 ) {
  59       putchar('\n');
  60       printf("%016llx %016llx %d <-\n", start, len, type);
  61       putchar('\n');
  62       insertrange(start, len, type);
  63       printranges();
  64     }
  65   }
  66
  67   parse_mem();
  68
  69   putchar('\n');
  70   printf("DOS  mem = %#10x (%u K)\n", dos_mem, dos_mem >> 10);
  71   printf("Low  mem = %#10x (%u K)\n", low_mem, low_mem >> 10);
  72   printf("High mem = %#10x (%u K)\n", high_mem, high_mem >> 10);
  73   putchar('\n');
  74
  75   /* Now, steal a chunk (2K) of DOS memory and make sure it registered OK */
  76   insertrange(dos_mem-2048, 2048, 2); /* Type 2 = reserved */
  77
  78   printranges();
  79   parse_mem();
  80
  81   putchar('\n');
  82   printf("DOS  mem = %#10x (%u K)\n", dos_mem, dos_mem >> 10);
  83   printf("Low  mem = %#10x (%u K)\n", low_mem, low_mem >> 10);
  84   printf("High mem = %#10x (%u K)\n", high_mem, high_mem >> 10);
  85   putchar('\n');
  86
  87   return 0;
  88 }