raven.c

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    1 /*
    2  *      ``Nevermore!''
    3  */
    4 #include        "u.h"
    5 #include        "../port/lib.h"
    6 #include        "mem.h"
    7 #include        "dat.h"
    8 #include        "fns.h"
    9 #include        "io.h"
   10 
   11 typedef struct Raven Raven;
   12 struct Raven
   13 {
   14         ushort  vid;
   15         ushort  did;
   16         uchar   _pad4;
   17         uchar   rev;
   18         uchar   _pad6[2];
   19         ushort  gcsr;
   20         ushort  feat;
   21         uchar   _padC[7];
   22         uchar   padj;
   23         uchar   _pad14[12];
   24         ushort  errtst;
   25         ushort  erren;
   26         uchar   _pad24[3];
   27         uchar   errst;
   28         ulong   errad;
   29         uchar   _pad2C[2];
   30         ushort  errat;
   31         ulong   piack;
   32         uchar   _pad34[12];
   33 
   34         struct {
   35                 ushort  start;
   36                 ushort  end;
   37                 ushort  off;
   38                 uchar   _pad;
   39                 uchar   attr;
   40         } map[4];
   41 
   42         struct {
   43                 ulong   cntl;
   44                 uchar   _pad[3];
   45                 uchar   stat;
   46         } wdt[2];
   47 
   48         ulong   gpr[4];
   49 };
   50 
   51 enum {
   52         /* map[] attr bits */
   53         Iom = (1<<0),
   54         Mem = (1<<1),
   55         Wpen = (1<<4),
   56         Wen = (1<<6),
   57         Ren = (1<<7),
   58 };
   59 
   60 static Raven *raven = (Raven*)RAVEN;
   61 static ulong mpic;
   62 
   63 static void
   64 setmap(int i, ulong addr, ulong len, ulong busaddr, int attr)
   65 {
   66         raven->map[i].start = addr>>16;
   67         raven->map[i].end = (addr+len-1)>>16;
   68         raven->map[i].off = (busaddr-addr)>>16;
   69         raven->map[i].attr = attr;
   70 }
   71 
   72 static ulong
   73 swap32(ulong x)
   74 {
   75         return (x>>24)|((x>>8)&0xff00)|((x<<8)&0xff0000)|(x<<24);
   76 }
   77 
   78 static ulong
   79 mpic32r(int rno)
   80 {
   81         return swap32(*(ulong*)(mpic+rno));
   82 }
   83 
   84 static void
   85 mpic32w(int rno, ulong x)
   86 {
   87         *(ulong*)(mpic+rno) = swap32(x);
   88         eieio();
   89 }
   90 
   91 void
   92 raveninit(void)
   93 {
   94         int i;
   95         Pcidev *p;
   96 
   97         if(raven->vid != 0x1057 || raven->did !=0x4801)
   98                 panic("raven not found");
   99 
  100         /* set up a sensible hardware memory/IO map */
  101         setmap(0, PCIMEM0, PCISIZE0, 0, Wen|Ren|Mem);
  102         setmap(1, KZERO, IOSIZE, 0, Wen|Ren);   /* keeps PPCbug happy */
  103         setmap(2, PCIMEM1, PCISIZE1, PCISIZE0, Wen|Ren|Mem);
  104         setmap(3, IOMEM, IOSIZE, 0, Wen|Ren);   /* I/O must be slot 3 for PCI cfg space */
  105 
  106         p = pcimatch(nil, 0x1057, 0x4801);
  107         if(p == nil)
  108                 panic("raven PCI regs not found");
  109         mpic = (p->mem[1].bar+PCIMEM0);
  110 
  111         /* ensure all interrupts are off, and routed to cpu 0 */
  112         for(i = 0; i < 16; i++) {
  113                 mpic32w(0x10000+0x20*i, (1<<31));       /* mask */
  114                 mpic32w(0x10010+0x20*i, 1);                     /* route to cpu 0 */
  115         }
  116 
  117         mpic32w(0x20080, 1);                    /* cpu 0 task pri */
  118 //      mpic32w(0x21080, 1);                    /* cpu 1 task pri */
  119         mpic32w(0x1020, (1<<29));               /* Mixed mode (8259 & Raven intrs both available) */
  120 }
  121 
  122 void
  123 mpicenable(int vec, Vctl *v)
  124 {
  125         ulong x;
  126 
  127         x = (1<<22)|(15<<16)|vec;
  128         if(vec == 0)
  129                 x |= (1<<23);
  130         mpic32w(0x10000+0x20*vec, x);
  131         if(vec != 0)
  132                 v->eoi = mpiceoi;
  133 }
  134 
  135 void
  136 mpicdisable(int vec)
  137 {
  138         mpic32w(0x10000+0x20*vec, (1<<31));
  139 }
  140 
  141 int
  142 mpicintack(void)
  143 {
  144         return mpic32r(0x200A0 + (m->machno<<12));
  145 }
  146 
  147 int
  148 mpiceoi(int vec)
  149 {
  150         USED(vec);
  151         mpic32w(0x200B0 + (m->machno<<12), 0);
  152         return 0;
  153 }

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FreeBSD/Linux Kernel Cross Reference sys/mtx/raven.c

FreeBSD/Linux Kernel Cross Reference
sys/mtx/raven.c