Return to mba.c CVS log

Up to [CSRG BSD Unix] / 3BSD / sys / stand

Annotation of 3BSD/sys/stand/mba.c, revision 1.1.1.1

1.1       root        1: #include "../h/param.h"
                      2: #include "../h/inode.h"
                      3: #include "../h/pte.h"
                      4: #include "../h/mba.h"
                      5: #include "../h/mtpr.h"
                      6: #include "../h/vm.h"
                      7: #include "saio.h"
                      8: 
                      9: /*
                     10:  * startup routine for MBA controllers.
                     11:  */
                     12: #define        MBAWCOM 0x30
                     13: #define        MBARCOM 0x38
                     14: #define        GO      01
                     15: 
                     16: mbastart(io, adcr, func)
                     17: register struct iob *io;
                     18: int *adcr;
                     19: {
                     20:        register int i;
                     21:        int npf;
                     22:        unsigned v;
                     23:        register struct pte *pte;
                     24:        int o;
                     25:        int vaddr;
                     26:        extern int mbanum[], *mbaloc[];
                     27:        register struct mba_regs *mbap;
                     28: 
                     29:        mbap = (struct mba_regs *)mbaloc[mbanum[io->i_unit]];
                     30:        pte = (struct pte *)mbap;
                     31:        pte += (MBA_MAP + 128*4)/4;
                     32:        v = btop(io->i_ma);
                     33:        o = (int)io->i_ma & PGOFSET;
                     34:        npf = btoc(io->i_cc + o);
                     35:        vaddr = (128 << 9) | o;
                     36:        v &= 0x1fffff;          /* drop to physical addr */
                     37:        while (--npf >= 0)
                     38:                *(int *)pte++ = v++ | PG_V;
                     39:        mbap->mba_sr = -1;      /* clear status (error) bits */
                     40:        mbap->mba_bcr = -io->i_cc;
                     41:        mbap->mba_var = vaddr;
                     42:        if (func == READ)
                     43:                *adcr = MBARCOM | GO;
                     44:        else if (func == WRITE) {
                     45:                *adcr = MBAWCOM | GO;
                     46:        }
                     47: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.