ich2/smm-open-ich2.c

   1 #include "reg-82815.h"
   2 #include <unistd.h>
   3 #include <getopt.h>
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6
   7 /***********************************************************************
   8  * DEPRECATED DEPRECATED DEPRECATED DEPRECATED DEPRECATED
   9  *
  10  * This should be replaced by ../util/smram-ich2 once it's verified to work properly.
  11  */
  12
  13 unsigned long memsz[] = {
  14         0,                      // 0
  15         32*1024*1024,           // 1
  16         32*1024*1024,           // 2
  17         48*1024*1024,           // 3
  18         64*1024*1024,           // 4
  19         64*1024*1024,           // 5
  20         96*1024*1024,           // 6
  21         128*1024*1024,          // 7
  22         128*1024*1024,          // 8
  23         128*1024*1024,          // 9
  24         128*1024*1024,          // A
  25         192*1024*1024,          // B
  26         256*1024*1024,          // C
  27         256*1024*1024,          // D
  28         256*1024*1024,          // E
  29         512*1024*1024           // F
  30 };
  31
  32 void dump(unsigned char smramc, unsigned char drp, unsigned char drp2) {
  33
  34         unsigned int tom = 0;
  35         int usmm, lsmm;
  36
  37         printf("SMRAMC: %02x\n", smramc);
  38
  39         tom += memsz[drp & 0xF];
  40         tom += memsz[drp >> 4];
  41         tom += memsz[drp2 & 0xF];
  42
  43         printf("Top of DRAM: %08x\n", tom);
  44
  45         usmm = (smramc >> 4) & 0x3;
  46         lsmm = (smramc >> 2) & 0x3;
  47
  48         switch (usmm)
  49         {
  50         case 0:
  51                 printf("TSEG and HSEG both off\n");
  52                 break;
  53         case 1:
  54                 printf("TSEG off, HSEG %s\n", lsmm ? "off" : "on");
  55                 break;
  56         case 2:
  57                 printf("TSEG 512KB (%08x - %08x), HSEG %s\n",
  58                         tom - 512 * 1024, tom - 1, lsmm ? "off" : "on");
  59                 break;
  60         case 3:
  61                 printf("TSEG 1MB (%08x - %08x), HSEG %s\n",
  62                         tom - 1 * 1024 * 1024, tom - 1, lsmm ? "off" : "on");
  63                 break;
  64         }
  65
  66         switch (lsmm)
  67         {
  68         case 0:
  69                 printf("ABSEG disabled\n");
  70                 break;
  71         case 1:
  72                 printf("ABSEG enabled as system RAM\n");
  73                 break;
  74         case 2:
  75                 printf("ABSEG enabled for SMM code only\n");
  76                 break;
  77         case 3:
  78                 printf("ABSEG enabled for both SMM code and data\n");
  79                 break;
  80         }
  81 }
  82
  83 static struct option longopts[] = {
  84         { "open",       no_argument,    NULL,   'o'     },
  85         { "close",      no_argument,    NULL,   'c'     },
  86         { "smram",      no_argument,    NULL,   's'     },
  87         { "dump",       no_argument,    NULL,   'd'     },
  88         { NULL,         0,              NULL,   0       }
  89 };
  90
  91 #define OP_DUMP 1
  92 #define OP_SET 2
  93
  94 void usage(int argc, char **argv)
  95 {
  96         printf("Usage: %s [ --dump ] [ --open | --close | --smram=value ]\n",
  97                 argv[0]);
  98         exit(1);
  99 }
 100
 101 int main(int argc, char **argv)
 102 {
 103         unsigned char smramc, drp, drp2;
 104
 105         if (geteuid() != 0)
 106         {
 107                 printf("This program must be run as root, dumbass.\n");
 108                 return 1;
 109         }
 110
 111         smramc = pci_read8(0, 0, 0, SMRAMC);
 112         drp = pci_read8(0, 0, 0, DRP);
 113         drp2 = pci_read8(0, 0, 0, DRP2);
 114
 115         if (smramc & SMRAMC_LOCK)
 116         {
 117                 printf("SMRAM is locked, cannot load anything :-(\n");
 118                 return 1;
 119         }
 120
 121         int ch;
 122         int op = 0;
 123         int new_smramc = smramc;
 124
 125         while ((ch = getopt_long(argc, argv, "ocsd:", longopts, NULL)) != -1)
 126         {
 127                 switch (ch)
 128                 {
 129                 case 's':
 130                         if (op & OP_SET) usage(argc, argv);
 131                         op |= OP_SET;
 132                         new_smramc = strtoul(optarg, 0, 0);
 133                         break;
 134                 case 'o':
 135                         if (op & OP_SET) usage(argc, argv);
 136                         op |= OP_SET;
 137                         /* Set LSMM to 01 (ABseg = system RAM) */
 138                         new_smramc = (smramc & 0xF0) | 0x04;
 139                         break;
 140                 case 'c':
 141                         if (op & OP_SET) usage(argc, argv);
 142                         op |= OP_SET;
 143                         /* Set LSMM to 11 (ABseg = SMM RAM) */
 144                         new_smramc = (smramc & 0xF0) | 0x0C;
 145                         break;
 146                 case 'd':
 147                         op |= OP_DUMP;
 148                         break;
 149                 default:
 150                         usage(argc, argv);
 151                 }
 152         }
 153
 154         if (!op) usage(argc, argv);
 155
 156         if (op & OP_DUMP)
 157         {
 158                 dump(smramc, drp, drp2);
 159         }
 160
 161         if (op & OP_SET)
 162         {
 163                 pci_write8(0, 0, 0, SMRAMC, new_smramc);
 164                 if (op & OP_DUMP)
 165                 {
 166                         printf("SMRAM set to 0x%02x\n", new_smramc);
 167                 }
 168         }
 169
 170         return 0;
 171 }