diff options
Diffstat (limited to 'sys/arch/vax/vsa/vsbus.c')
| -rw-r--r-- | sys/arch/vax/vsa/vsbus.c | 100 |
1 files changed, 88 insertions, 12 deletions
diff --git a/sys/arch/vax/vsa/vsbus.c b/sys/arch/vax/vsa/vsbus.c index d66f4ed6310..6e2df6f4a8b 100644 --- a/sys/arch/vax/vsa/vsbus.c +++ b/sys/arch/vax/vsa/vsbus.c @@ -1,5 +1,5 @@ -/* $OpenBSD: vsbus.c,v 1.4 2000/04/27 00:52:07 bjc Exp $ */ -/* $NetBSD: vsbus.c,v 1.20 1999/10/22 21:10:12 ragge Exp $ */ +/* $OpenBSD: vsbus.c,v 1.5 2000/10/11 06:19:19 bjc Exp $ */ +/* $NetBSD: vsbus.c,v 1.29 2000/06/29 07:14:37 mrg Exp $ */ /* * Copyright (c) 1996, 1999 Ludd, University of Lule}, Sweden. * All rights reserved. @@ -49,6 +49,7 @@ #include <sys/stat.h> #include <vm/vm.h> +#include <vm/vm_kern.h> #define _VAX_BUS_DMA_PRIVATE #include <machine/bus.h> @@ -96,6 +97,9 @@ struct vax_bus_dma_tag vsbus_bus_dma_tag = { _bus_dmamem_mmap, }; +extern struct vax_bus_space vax_mem_bus_space; +static SIMPLEQ_HEAD(, vsbus_dma) vsbus_dma; + struct cfattach vsbus_ca = { sizeof(struct vsbus_softc), (cfmatch_t)vsbus_match, vsbus_attach }; @@ -141,27 +145,55 @@ vsbus_attach(parent, self, aux) void *aux; { struct vsbus_softc *sc = (void *)self; + int dbase, dsize; int discard; - vaddr_t temp; printf("\n"); + sc->sc_dmatag = vsbus_bus_dma_tag; + switch (vax_boardtype) { +#if VAX49 case VAX_BTYP_49: - temp = vax_map_physmem(0x25c00000, 1); - sc->sc_intreq = (char *)temp + 12; - sc->sc_intclr = (char *)temp + 12; - sc->sc_intmsk = (char *)temp + 8; + sc->sc_vsregs = vax_map_physmem(0x25c00000, 1); + sc->sc_intreq = (char *)sc->sc_vsregs + 12; + sc->sc_intclr = (char *)sc->sc_vsregs + 12; + sc->sc_intmsk = (char *)sc->sc_vsregs + 8; + vsbus_dma_init(sc, 8192); break; +#endif + +#if VAX46 || VAX48 + case VAX_BTYP_48: + case VAX_BTYP_46: + sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); + sc->sc_intreq = (char *)sc->sc_vsregs + 15; + sc->sc_intclr = (char *)sc->sc_vsregs + 15; + sc->sc_intmsk = (char *)sc->sc_vsregs + 12; + vsbus_dma_init(sc, 32768); +#endif + default: - temp = vax_map_physmem(VS_REGS, 1); - sc->sc_intreq = (char *)temp + 15; - sc->sc_intclr = (char *)temp + 15; - sc->sc_intmsk = (char *)temp + 12; + sc->sc_vsregs = vax_map_physmem(VS_REGS, 1); + sc->sc_intreq = (char *)sc->sc_vsregs + 15; + sc->sc_intclr = (char *)sc->sc_vsregs + 15; + sc->sc_intmsk = (char *)sc->sc_vsregs + 12; + if (vax_boardtype == VAX_BTYP_410) { + dbase = KA410_DMA_BASE; + dsize = KA410_DMA_SIZE; + } else { + dbase = KA420_DMA_BASE; + dsize = KA420_DMA_SIZE; + *(char *)(sc->sc_vsregs + 0xe0) = 1; /* Big DMA */ + } + sc->sc_dmasize = dsize; + sc->sc_dmaaddr = uvm_km_valloc(kernel_map, dsize); + ioaccess(sc->sc_dmaaddr, dbase, dsize/VAX_NBPG); break; } + SIMPLEQ_INIT(&vsbus_dma); /* * First: find which interrupts we won't care about. * There are interrupts that interrupt on a periodic basic @@ -196,7 +228,8 @@ vsbus_search(parent, cfd, aux) va.va_paddr = cf->cf_loc[0]; va.va_addr = vax_map_physmem(va.va_paddr, 1); - va.va_dmat = &vsbus_bus_dma_tag; + va.va_dmat = &sc->sc_dmatag; + va.va_iot = &vax_mem_bus_space; *sc->sc_intmsk = 0; *sc->sc_intclr = 0xff; @@ -229,6 +262,8 @@ vsbus_search(parent, cfd, aux) va.va_br = br; va.va_cvec = vec; va.confargs = aux; + va.va_dmaaddr = sc->sc_dmaaddr; + va.va_dmasize = sc->sc_dmasize; config_attach(parent, cf, &va, vsbus_print); return 1; @@ -241,6 +276,7 @@ forgetit: return 0; } +#if 0 static volatile struct dma_lock { int dl_locked; int dl_wanted; @@ -288,6 +324,7 @@ vsbus_unlockDMA(ca) } return (0); } +#endif /* @@ -331,6 +368,10 @@ vsbus_copytoproc(p, from, to, len) struct pte *pte; paddr_t pa; + if ((long)to & KERNBASE) { /* In kernel space */ + bcopy(from, to, len); + return; + } pte = uvtopte(TRUNC_PAGE(to), (&p->p_addr->u_pcb)); if ((vaddr_t)to & PGOFSET) { int cz = ROUND_PAGE(to) - (vaddr_t)to; @@ -361,6 +402,10 @@ vsbus_copyfromproc(p, from, to, len) struct pte *pte; paddr_t pa; + if ((long)from & KERNBASE) { /* In kernel space */ + bcopy(from, to, len); + return; + } pte = uvtopte(TRUNC_PAGE(from), (&p->p_addr->u_pcb)); if ((vaddr_t)from & PGOFSET) { int cz = ROUND_PAGE(from) - (vaddr_t)from; @@ -381,3 +426,34 @@ vsbus_copyfromproc(p, from, to, len) pte += 8; /* XXX */ } } + +/* + * There can only be one user of the DMA area on VS2k/VS3100 at one + * time, so keep track of it here. + */ +static int vsbus_active = 0; + +void +vsbus_dma_start(struct vsbus_dma *vd) +{ + SIMPLEQ_INSERT_TAIL(&vsbus_dma, vd, vd_q); + + if (vsbus_active == 0) + vsbus_dma_intr(); +} + +void +vsbus_dma_intr(void) +{ + struct vsbus_dma *vd; + + vd = SIMPLEQ_FIRST(&vsbus_dma); + if (vd == NULL) { + vsbus_active = 0; + return; + } + vsbus_active = 1; + SIMPLEQ_REMOVE_HEAD(&vsbus_dma, vd, vd_q); + (*vd->vd_go)(vd->vd_arg); +} + |