# /* */ #include "../h/param.h" #include "../h/buf.h" #include "../h/conf.h" #include "../h/systm.h" #include "../h/dir.h" #include "../h/user.h" #include "../h/proc.h" #include "../h/seg.h" #include "../h/page.h" #include "../h/uba.h" #include "../h/map.h" #include "../h/mba.h" #include "../h/mtpr.h" /* * startup routine for MBA controllers. */ #define MBAWCOM 0x30 #define MBARCOM 0x38 #define GO 01 int mbaboff; mbastart(bp, adcr) register struct buf *bp; int *adcr; { int vaddr, com; register int *io, num; register struct mba_regs *mbap; register int *pt, i; int pf; extern int mbanum[], *mbaloc[], mbautl[], Mbamap[]; extern char buffers[][]; mbap = (struct mba_regs *)mbaloc[mbanum[major(bp->b_dev)]]; if ( (bp->b_flags & B_PHYS) == 0 ) { vaddr = (bp->b_un.b_addr - (char *)buffers) + mbaboff; } else { ptaccess(bp->b_proc, Mbamap, mbautl); /* get to u-area & page tables */ io = (int *)mbap; io += (MBA_MAP + 128*4)/4; vaddr = (128 << 9) | ((int)bp->b_un.b_addr & 0x1ff); pf = (int)bp->b_un.b_addr >> 9; num = (((int)bp->b_un.b_addr + bp->b_bcount - 1) >> 9) - pf +1; if ((bp -> b_flags & B_UAREA) != 0) { /* u-area should be part of the I/O */ for(i=0; i<UPAGES; i++) { if ((*io++ = PG_V | bp->b_proc->p_addr[i])==PG_V) panic("mba, zero u-page"); } num -= UPAGES; } if (pf & 0x200000) { /* I/O to stack */ i = ((struct user *)mbautl)->u_pcb.pcb_szpt; pf = i*128 + pf - 0x400000; } pt = mbautl + UPAGES*128 + pf; while ( num-->0) { if ((*io++ = *pt++ | PG_V)==PG_V) panic("mba, zero entry"); } } mbap->mba_sr = -1; /* clear status (error) bits */ mbap->mba_bcr = -bp->b_bcount; mbap->mba_var = vaddr; if (bp->b_flags & B_READ) com = MBARCOM | GO; else com = MBAWCOM | GO; *adcr = com; /* set cmd in device control and status register */ } mbainit() { register int *io0, *io1, *b, t, j; extern int Sysmap[], *mbaloc[]; extern char buffers[][]; io0 = mbaloc[0] + (MBA_MAP/4); io1 = mbaloc[1] + (MBA_MAP/4); b = Sysmap + ((((int) buffers)>>9)&PG_PFNUM); j = NBUF + ((int)buffers & 0x1ff ? 1 : 0); do { t = PG_V | (*b++ & PG_PFNUM); *io0++ = t; *io1++ = t; } while (--j>0); *io0 = 0; /* invalidate next entry */ *io1 = 0; mbaboff = (int)buffers & 0x1ff; }