More churn moving files around.

[netwatch.git] / hardware / ich2 / smm-open-ich2.c

diff --git a/hardware/ich2/smm-open-ich2.c b/hardware/ich2/smm-open-ich2.c
new file mode 100644 (file)
index 0000000..8131961
--- /dev/null
+++ b/hardware/ich2/smm-open-ich2.c
@@ -0,0 +1,182 @@
+/* smm-open-ich2.c
+ * SMRAM control utility for ICH2 southbridge
+ * NetWatch system management mode administration console
+ *
+ * Copyright (c) 2008 Jacob Potter and Joshua Wise.  All rights reserved.
+ * This program is free software; you can redistribute and/or modify it under
+ * the terms found in the file LICENSE in the root of this source tree. 
+ *
+ */
+
+
+#include "reg-82815.h"
+#include <unistd.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+/***********************************************************************
+ * DEPRECATED DEPRECATED DEPRECATED DEPRECATED DEPRECATED
+ *
+ * This should be replaced by ../util/smram-ich2 once it's verified to work properly.
+ */
+
+unsigned long memsz[] = {
+       0,                      // 0
+       32*1024*1024,           // 1
+       32*1024*1024,           // 2
+       48*1024*1024,           // 3
+       64*1024*1024,           // 4
+       64*1024*1024,           // 5
+       96*1024*1024,           // 6
+       128*1024*1024,          // 7
+       128*1024*1024,          // 8
+       128*1024*1024,          // 9
+       128*1024*1024,          // A
+       192*1024*1024,          // B
+       256*1024*1024,          // C
+       256*1024*1024,          // D
+       256*1024*1024,          // E
+       512*1024*1024           // F
+};
+
+void dump(unsigned char smramc, unsigned char drp, unsigned char drp2) {
+
+       unsigned int tom = 0;
+       int usmm, lsmm;
+
+       printf("SMRAMC: %02x\n", smramc);
+
+       tom += memsz[drp & 0xF];
+       tom += memsz[drp >> 4];
+       tom += memsz[drp2 & 0xF];
+       
+       printf("Top of DRAM: %08x\n", tom);
+       
+       usmm = (smramc >> 4) & 0x3;
+       lsmm = (smramc >> 2) & 0x3;
+       
+       switch (usmm)
+       {
+       case 0:
+               printf("TSEG and HSEG both off\n");
+               break;
+       case 1:
+               printf("TSEG off, HSEG %s\n", lsmm ? "off" : "on");
+               break;
+       case 2:
+               printf("TSEG 512KB (%08x - %08x), HSEG %s\n",
+                       tom - 512 * 1024, tom - 1, lsmm ? "off" : "on");
+               break;
+       case 3:
+               printf("TSEG 1MB (%08x - %08x), HSEG %s\n",
+                       tom - 1 * 1024 * 1024, tom - 1, lsmm ? "off" : "on");
+               break;
+       }
+       
+       switch (lsmm)
+       {
+       case 0:
+               printf("ABSEG disabled\n");
+               break;
+       case 1:
+               printf("ABSEG enabled as system RAM\n");
+               break;
+       case 2:
+               printf("ABSEG enabled for SMM code only\n");
+               break;
+       case 3:
+               printf("ABSEG enabled for both SMM code and data\n");
+               break;
+       }
+}
+
+static struct option longopts[] = {
+       { "open",       no_argument,    NULL,   'o'     },
+       { "close",      no_argument,    NULL,   'c'     },
+       { "smram",      no_argument,    NULL,   's'     },
+       { "dump",       no_argument,    NULL,   'd'     },
+       { NULL,         0,              NULL,   0       }
+};
+
+#define OP_DUMP 1
+#define OP_SET 2
+
+void usage(int argc, char **argv)
+{
+       printf("Usage: %s [ --dump ] [ --open | --close | --smram=value ]\n",
+               argv[0]);
+       exit(1);
+}
+
+int main(int argc, char **argv)
+{
+       unsigned char smramc, drp, drp2;
+
+       if (geteuid() != 0)
+       {
+               printf("This program must be run as root, dumbass.\n");
+               return 1;
+       }
+       
+       smramc = pci_read8(0, 0, 0, SMRAMC);
+       drp = pci_read8(0, 0, 0, DRP);
+       drp2 = pci_read8(0, 0, 0, DRP2);
+       
+       if (smramc & SMRAMC_LOCK)
+       {
+               printf("SMRAM is locked, cannot load anything :-(\n");
+               return 1;
+       }
+
+       int ch;
+       int op = 0;
+       int new_smramc = smramc;
+
+       while ((ch = getopt_long(argc, argv, "ocsd:", longopts, NULL)) != -1)
+       {
+               switch (ch)
+               {
+               case 's':
+                       if (op & OP_SET) usage(argc, argv);
+                       op |= OP_SET;
+                       new_smramc = strtoul(optarg, 0, 0);
+                       break;
+               case 'o':
+                       if (op & OP_SET) usage(argc, argv);
+                       op |= OP_SET;
+                       /* Set LSMM to 01 (ABseg = system RAM) */
+                       new_smramc = (smramc & 0xF0) | 0x04;
+                       break;
+               case 'c':
+                       if (op & OP_SET) usage(argc, argv);
+                       op |= OP_SET;
+                       /* Set LSMM to 11 (ABseg = SMM RAM) */
+                       new_smramc = (smramc & 0xF0) | 0x0C;
+                       break;
+               case 'd':
+                       op |= OP_DUMP;
+                       break;
+               default:
+                       usage(argc, argv);
+               }
+       }
+
+       if (!op) usage(argc, argv);
+
+       if (op & OP_DUMP)
+       {
+               dump(smramc, drp, drp2);
+       }
+
+       if (op & OP_SET)
+       {
+               pci_write8(0, 0, 0, SMRAMC, new_smramc);
+               if (op & OP_DUMP)
+               {
+                       printf("SMRAM set to 0x%02x\n", new_smramc);
+               }
+       }
+       
+       return 0;
+}