First stab at making a VM-controlled bankswitching driver

for the CrossLink driver

diff --git a/sys/arch/amiga/isa/cross.c b/sys/arch/amiga/isa/cross.c
index b5bbf77..826beac 100644 (file)
--- a/sys/arch/amiga/isa/cross.c
+++ b/sys/arch/amiga/isa/cross.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: cross.c,v 1.8 1996/11/28 23:33:06 niklas Exp $        */
+/*     $OpenBSD: cross.c,v 1.9 1997/01/05 02:04:33 niklas Exp $        */
 
 /*
  * Copyright (c) 1994, 1996 Niklas Hallqvist, Carsten Hammer
@@ -38,8 +38,7 @@
 #include <sys/systm.h>
 
 #include <vm/vm.h>
-#include <vm/vm.h>
-#include <vm/vm.h>
+#include <vm/vm_kern.h>
 
 #include <machine/bus.h>
 #include <machine/cpu.h>
@@ -67,8 +66,8 @@ int   cross_io_map __P((bus_space_tag_t, bus_addr_t, bus_size_t, int,
            bus_space_handle_t *));
 int    cross_mem_map __P((bus_space_tag_t, bus_addr_t, bus_size_t, int,
            bus_space_handle_t *));
-int    cross_io_unmap __P((bus_space_handle_t, bus_size_t));
-int    cross_mem_unmap __P((bus_space_handle_t, bus_size_t));
+int    cross_io_unmap __P((bus_space_tag_t, bus_space_handle_t, bus_size_t));
+int    cross_mem_unmap __P((bus_space_tag_t, bus_space_handle_t, bus_size_t));
 
 int    crossintr __P((void *));
 
@@ -101,7 +100,7 @@ struct pagerops crosspagerops = {
        NULL
 };
 
-struct vm_pager crosspager;
+struct pager_struct cross_pager;
 
 int
 crossmatch(parent, match, aux)
@@ -129,38 +128,46 @@ crossattach(parent, self, aux)
        int i;
 
        bcopy(zap, &sc->sc_zargs, sizeof(struct zbus_args));
+       sc->sc_status = CROSS_STATUS_ADDR(zap->va);
+       sc->sc_imask = 1 << CROSS_MASTER;
+
        sc->sc_iot.bs_data = sc;
        sc->sc_iot.bs_map = cross_io_map;
        sc->sc_iot.bs_unmap = cross_io_unmap;
        sc->sc_iot.bs_swapped = 1;
+
        sc->sc_memt.bs_data = sc;
        sc->sc_memt.bs_map = cross_mem_map;
        sc->sc_memt.bs_unmap = cross_mem_unmap;
        sc->sc_memt.bs_swapped = 1;
-       sc->sc_status = CROSS_STATUS_ADDR(zap->va);
-       sc->sc_imask = 1 << CROSS_MASTER;
-
-       /* Enable interrupts lazily in cross_intr_establish.  */
-       CROSS_ENABLE_INTS(zap->va, 0);
-
-       /* Default 16 bit tranfer  */
-       *CROSS_HANDLE_TO_XLP_LATCH((bus_space_handle_t)zap->va) = CROSS_SBHE; 
-       printf(": pa 0x%08x va 0x%08x size 0x%x\n", zap->pa, zap->va,
-           zap->size);
 
        sc->sc_ic.ic_data = sc;
        sc->sc_ic.ic_attach_hook = cross_attach_hook;
        sc->sc_ic.ic_intr_establish = cross_intr_establish;
        sc->sc_ic.ic_intr_disestablish = cross_intr_disestablish;
 
+       sc->sc_pager.pg_ops = &crosspagerops;
+       sc->sc_pager.pg_type = PG_DFLT;
+       sc->sc_pager.pg_flags = 0;
+       sc->sc_pager.pg_data = sc;
+
        /* Allocate a bunch of pages used for the bank-switching logic.  */
        for (i = 0; i < CROSS_BANK_SIZE / NBPG; i++) {
                VM_PAGE_INIT(&sc->sc_page[i], NULL, 0);
-               sc->sc_page[i].phys_addr = zap->pa + CROSS_XL_MEM + i * NBPG;
+               sc->sc_page[i].phys_addr = (vm_offset_t)zap->pa +
+                   CROSS_XL_MEM + i * NBPG;
                sc->sc_page[i].flags |= PG_FICTITIOUS;
                vm_page_free(&sc->sc_page[i]);
        }
-               
+
+       /* Enable interrupts lazily in cross_intr_establish.  */
+       CROSS_ENABLE_INTS(zap->va, 0);
+
+       /* Default 16 bit tranfer  */
+       *CROSS_HANDLE_TO_XLP_LATCH((bus_space_handle_t)zap->va) = CROSS_SBHE; 
+       printf(": pa 0x%08x va 0x%08x size 0x%x\n", zap->pa, zap->va,
+           zap->size);
+
        iba.iba_busname = "isa";
        iba.iba_iot = &sc->sc_iot;
        iba.iba_memt = &sc->sc_memt;
@@ -200,6 +207,7 @@ cross_mem_map(bst, addr, sz, cacheable, handle)
        int cacheable;
        bus_space_handle_t *handle;
 {
+       struct cross_softc *sc = (struct cross_softc *)bst->bs_data;
        bus_addr_t banked_start;
        bus_size_t banked_size;
        vm_object_t object;
@@ -207,8 +215,7 @@ cross_mem_map(bst, addr, sz, cacheable, handle)
        int error;
 
        /*
-        * XXX When we do have a good enough extent-manager do extent
-        * checking here.
+        * XXX Do extent checking here.
         */
 
        /*
@@ -220,10 +227,11 @@ cross_mem_map(bst, addr, sz, cacheable, handle)
            ~(CROSS_BANK_SIZE - 1);
 
        /* Create the object that will take care of the bankswitching.  */
-       object = vm_allocate_object(banked_size);
+       object = vm_object_allocate(banked_size);
        if (object == NULL)
                goto fail_obj;
-       vm_object_setpager(object, cross_pager, 0, 0);
+       vm_object_enter(object, &sc->sc_pager);
+       vm_object_setpager(object, &sc->sc_pager, banked_start, FALSE);
 
        /*
         * When done like this double mappings will be possible, thus
@@ -240,7 +248,7 @@ cross_mem_map(bst, addr, sz, cacheable, handle)
                goto fail_insert;
 
        /* Tell caller where to find his data.  */
-       *handle = (bus_space_handle_t)(kva + (addr << 1)  - banked_addr));
+       *handle = (bus_space_handle_t)(kva + (addr << 1) - banked_start);
        return 0;
 
 fail_insert:
@@ -266,7 +274,11 @@ cross_mem_unmap(bst, handle, sz)
        bus_space_handle_t handle;
        bus_size_t sz;
 {
-       /* Remove traphandler */
+#if 0
+       struct cross_softc *sc = (struct cross_softc *)bst->bs_data;
+#endif
+
+       /* Remove the object handling this mapping.  */
        return 0;
 }
 
@@ -351,10 +363,12 @@ cross_intr_establish(ic, irq, type, level, ih_fun, ih_arg, ih_what)
        ih->ih_what = ih_what;
        ih->ih_mask = 1 << cross_int_map[irq + 1];
        ih->ih_status = sc->sc_status;
+
        ih->ih_isr.isr_intr = crossintr;
        ih->ih_isr.isr_arg = ih;
        ih->ih_isr.isr_ipl = 6;
        ih->ih_isr.isr_mapped_ipl = level;
+
        *p = ih;
        add_isr(&ih->ih_isr);
 
@@ -404,6 +418,7 @@ cross_pager_get_pages(pager, mlist, npages, sync)
        int             npages;
        boolean_t       sync;
 {
+       struct cross_softc *sc = (struct cross_softc *)pager->pg_data;
        int i;
        vm_object_t object, old_object;
        vm_offset_t offset;
@@ -411,7 +426,7 @@ cross_pager_get_pages(pager, mlist, npages, sync)
        while(npages--) {
                i = ((*mlist)->offset & (CROSS_BANK_SIZE - 1)) / NBPG;
                object = (*mlist)->object;
-               old_object = sc->sc_page[i].offset;
+               old_object = sc->sc_page[i].object;
                offset = (*mlist)->offset;
                vm_page_lock_queues();
                vm_object_lock(object);
@@ -420,14 +435,15 @@ cross_pager_get_pages(pager, mlist, npages, sync)
                vm_page_free(*mlist);
 
                /* generate A13-A19 for correct page */
-               *CROSS_HANDLE_TO_XLP_LATCH(handle) = addr >> 13 | CROSS_SBHE;
+               *CROSS_HANDLE_TO_XLP_LATCH((bus_space_handle_t)sc->sc_zargs.va) =
+                   object->paging_offset >> 13 | CROSS_SBHE;
 
-               vm_page_rename(sc->sc_page[i], object, offset);
+               vm_page_rename(&sc->sc_page[i], object, offset);
                if (old_object)
                        vm_object_unlock(old_object);
                vm_object_unlock(object);
                vm_page_unlock_queues();
-               mlist++:
+               mlist++;
        }
        return VM_PAGER_OK;
 }

diff --git a/sys/arch/amiga/isa/crossvar.h b/sys/arch/amiga/isa/crossvar.h
index 67a77e8..9317680 100644 (file)
--- a/sys/arch/amiga/isa/crossvar.h
+++ b/sys/arch/amiga/isa/crossvar.h
@@ -1,4 +1,4 @@
-/*     $OpenBSD: crossvar.h,v 1.4 1996/11/28 23:33:08 niklas Exp $     */
+/*     $OpenBSD: crossvar.h,v 1.5 1997/01/05 02:04:33 niklas Exp $     */
 
 /*
  * Copyright (c) 1994, 1996 Niklas Hallqvist
@@ -61,6 +61,7 @@ struct cross_softc {
        u_int16_t sc_imask;
        volatile u_int16_t *sc_status;
        struct vm_page sc_page[CROSS_BANK_SIZE / NBPG];
+       struct pager_struct sc_pager;
 
        struct amiga_bus_space sc_iot;
        struct amiga_bus_space sc_memt;