date and time created 90/03/12 15:48:23 by bill

SCCS-vsn: sys/i386/i386/swapgeneric.c 1.1

diff --git a/usr/src/sys/i386/i386/swapgeneric.c b/usr/src/sys/i386/i386/swapgeneric.c
new file mode 100644 (file)
index 0000000..a935fb4
--- /dev/null
+++ b/usr/src/sys/i386/i386/swapgeneric.c
@@ -0,0 +1,135 @@
+/*     swapgeneric.c   1.5     86/11/25        */
+
+#include "../machine/pte.h"
+
+#include "param.h"
+#include "conf.h"
+#include "buf.h"
+#include "vm.h"
+#include "systm.h"
+#include "reboot.h"
+
+#include "../tahoe/cpu.h"
+#include "../tahoe/cp.h"
+#include "../tahoe/mtpr.h"
+#include "../tahoevba/vbavar.h"
+
+/*
+ * Generic configuration;  all in one
+ */
+dev_t  rootdev = NODEV;
+dev_t  argdev = NODEV;
+dev_t  dumpdev = NODEV;
+int    nswap;
+struct swdevt swdevt[] = {
+       { -1,   1,      0 },
+       { 0,    0,      0 },
+};
+long   dumplo;
+int    dmmin, dmmax, dmtext;
+
+extern struct vba_driver vddriver;
+
+struct genericconf {
+       caddr_t gc_driver;
+       char    *gc_name;
+       dev_t   gc_root;
+} genericconf[] = {
+       { (caddr_t)&vddriver,   "dk",   makedev(1, 0),  },
+       { 0 },
+};
+
+setconf()
+{
+       register struct vba_device *ui;
+       register struct genericconf *gc;
+       int unit, swaponroot = 0;
+
+       if (rootdev != NODEV)
+               goto doswap;
+       if (boothowto & RB_ASKNAME) {
+               char name[128];
+retry:
+               printf("root device? ");
+               gets(name);
+               for (gc = genericconf; gc->gc_driver; gc++)
+                       if (gc->gc_name[0] == name[0] &&
+                           gc->gc_name[1] == name[1])
+                               goto gotit;
+               goto bad;
+gotit:
+               if (name[3] == '*') {
+                       name[3] = name[4];
+                       swaponroot++;
+               }
+               if (name[2] >= '0' && name[2] <= '7' && name[3] == 0) {
+                       unit = name[2] - '0';
+                       goto found;
+               }
+               printf("bad/missing unit number\n");
+bad:
+               printf("use dk%%d\n");
+               goto retry;
+       }
+       unit = 0;
+       for (gc = genericconf; gc->gc_driver; gc++) {
+               for (ui = vbdinit; ui->ui_driver; ui++) {
+                       if (ui->ui_alive == 0)
+                               continue;
+                       if (ui->ui_unit == 0 && ui->ui_driver ==
+                           (struct vba_driver *)gc->gc_driver) {
+                               printf("root on %s0\n",
+                                   ui->ui_driver->ud_dname);
+                               goto found;
+                       }
+               }
+       }
+       printf("no suitable root\n");
+       asm("halt");
+found:
+       gc->gc_root = makedev(major(gc->gc_root), unit*8);
+       rootdev = gc->gc_root;
+doswap:
+       swdevt[0].sw_dev = argdev = dumpdev =
+           makedev(major(rootdev), minor(rootdev)+1);
+       /* swap size and dumplo set during autoconfigure */
+       if (swaponroot)
+               rootdev = dumpdev;
+}
+
+gets(cp)
+       char *cp;
+{
+       register char *lp;
+       register c;
+
+       lp = cp;
+       for (;;) {
+               printf("%c", c = cngetc()&0177);
+               switch (c) {
+               case '\n':
+               case '\r':
+                       *lp++ = '\0';
+                       return;
+               case '\b':
+               case '\177':
+                       if (lp > cp) {
+                               printf(" \b");
+                               lp--;
+                       }
+                       continue;
+               case '#':
+                       lp--;
+                       if (lp < cp)
+                               lp = cp;
+                       continue;
+               case '@':
+               case 'u'&037:
+                       lp = cp;
+                       printf("%c", '\n');
+                       continue;
+               default:
+                       *lp++ = c;
+               }
+       }
+}