sys/src/boot/alphapc/exec.c

   1 #include        "u.h"
   2 #include        "mem.h"
   3 #include        "dat.h"
   4 #include        "fns.h"
   5 #include        "lib.h"
   6
   7 uchar   pcbpage[64*1024+sizeof(PCB)];
   8 PCB             *pcb;
   9
  10 void    (*kentry)(Bootconf*);
  11
  12 void
  13 gokernel(void)
  14 {
  15         (*kentry)(&conf);
  16 }
  17
  18 void
  19 kexec(ulong entry)
  20 {
  21         uvlong pcbb, paltype;
  22
  23         pcb = (PCB*)(((ulong)pcbpage+0xffff) & ~0xffff);        /* page align, even on 64K page Alphas */
  24         memset(pcb, 0, sizeof(PCB));
  25         pcb->ksp = (uvlong)&entry;
  26         pcb->ptbr = getptbr();
  27         pcb->fen = 1;
  28         conf.pcb = pcb;
  29         pcbb = paddr((uvlong)pcb);
  30         kentry = (void(*)(Bootconf*))entry;
  31         paltype = 2;    /* OSF/1 please */
  32         switch (swppal(paltype, (uvlong)gokernel, pcbb, hwrpb->vptb, pcb->ksp)) {
  33         case 1:
  34                 panic("unknown PALcode variant");
  35         case 2:
  36                 panic("PALcode variant not loaded");
  37         default:
  38                 panic("weird return status from swppal");
  39         }
  40 }