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freebsd-skq/sys/alpha/mcbus/mcpcia.c

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/* $FreeBSD$ */
/*
* Copyright (c) 2000 Matthew Jacob
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/swiz.h>
#include <machine/intr.h>
#include <machine/intrcnt.h>
#include <machine/resource.h>
#include <machine/sgmap.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
#include <alpha/mcbus/mcbusreg.h>
#include <alpha/mcbus/mcbusvar.h>
#include <alpha/mcbus/mcpciareg.h>
#include <alpha/mcbus/mcpciavar.h>
#include <alpha/pci/pcibus.h>
#include <pci/pcivar.h>
static devclass_t mcpcia_devclass;
/* We're only allowing for one MCBUS right now */
static device_t mcpcias[MCPCIA_PER_MCBUS];
#define KV(pa) ((void *)ALPHA_PHYS_TO_K0SEG(pa))
struct mcpcia_softc {
struct mcpcia_softc *next;
device_t dev; /* backpointer */
u_int64_t sysbase; /* shorthand */
vm_offset_t dmem_base; /* dense memory */
vm_offset_t smem_base; /* sparse memory */
vm_offset_t io_base; /* sparse i/o */
int mcpcia_inst; /* our mcpcia instance # */
};
static struct mcpcia_softc *mcpcia_eisa = NULL;
extern void dec_kn300_cons_init(void);
static int mcpcia_probe(device_t dev);
static int mcpcia_attach(device_t dev);
static int mcpcia_setup_intr(device_t, device_t, struct resource *, int,
driver_intr_t *, void *, void **);
static int
mcpcia_teardown_intr(device_t, device_t, struct resource *, void *);
static driver_intr_t mcpcia_intr;
static void mcpcia_enable_intr(struct mcpcia_softc *, int);
static void mcpcia_disable_intr(struct mcpcia_softc *, int);
static device_method_t mcpcia_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, mcpcia_probe),
DEVMETHOD(device_attach, mcpcia_attach),
/* Bus interface */
DEVMETHOD(bus_setup_intr, mcpcia_setup_intr),
DEVMETHOD(bus_teardown_intr, mcpcia_teardown_intr),
DEVMETHOD(bus_alloc_resource, pci_alloc_resource),
DEVMETHOD(bus_release_resource, pci_release_resource),
DEVMETHOD(bus_activate_resource, pci_activate_resource),
DEVMETHOD(bus_deactivate_resource, pci_deactivate_resource),
{ 0, 0 }
};
static driver_t mcpcia_driver = {
"mcpcia", mcpcia_methods, sizeof (struct mcpcia_softc)
};
/*
* SGMAP window for ISA: 8M at 8M
*/
#define MCPCIA_ISA_SG_MAPPED_BASE (8*1024*1024)
#define MCPCIA_ISA_SG_MAPPED_SIZE (8*1024*1024)
/*
* Direct-mapped window: 2G at 2G
*/
#define MCPCIA_DIRECT_MAPPED_BASE (2UL*1024UL*1024UL*1024UL)
#define MCPCIA_DIRECT_MAPPED_SIZE (2UL*1024UL*1024UL*1024UL)
/*
* SGMAP window for PCI: 1G at 1G
*/
#define MCPCIA_PCI_SG_MAPPED_BASE (1UL*1024UL*1024UL*1024UL)
#define MCPCIA_PCI_SG_MAPPED_SIZE (1UL*1024UL*1024UL*1024UL)
#define MCPCIA_SGTLB_INVALIDATE(sc) \
do { \
alpha_mb(); \
REGVAL(MCPCIA_SG_TBIA(sc)) = 0xdeadbeef; \
alpha_mb(); \
} while (0)
static void mcpcia_dma_init(struct mcpcia_softc *);
static void mcpcia_sgmap_map(void *, vm_offset_t, vm_offset_t);
#define MCPCIA_SOFTC(dev) (struct mcpcia_softc *) device_get_softc(dev)
static struct mcpcia_softc *mcpcia_root;
static alpha_chipset_inb_t mcpcia_inb;
static alpha_chipset_inw_t mcpcia_inw;
static alpha_chipset_inl_t mcpcia_inl;
static alpha_chipset_outb_t mcpcia_outb;
static alpha_chipset_outw_t mcpcia_outw;
static alpha_chipset_outl_t mcpcia_outl;
static alpha_chipset_readb_t mcpcia_readb;
static alpha_chipset_readw_t mcpcia_readw;
static alpha_chipset_readl_t mcpcia_readl;
static alpha_chipset_writeb_t mcpcia_writeb;
static alpha_chipset_writew_t mcpcia_writew;
static alpha_chipset_writel_t mcpcia_writel;
static alpha_chipset_maxdevs_t mcpcia_maxdevs;
static alpha_chipset_cfgreadb_t mcpcia_cfgreadb;
static alpha_chipset_cfgreadw_t mcpcia_cfgreadw;
static alpha_chipset_cfgreadl_t mcpcia_cfgreadl;
static alpha_chipset_cfgwriteb_t mcpcia_cfgwriteb;
static alpha_chipset_cfgwritew_t mcpcia_cfgwritew;
static alpha_chipset_cfgwritel_t mcpcia_cfgwritel;
static alpha_chipset_t mcpcia_chipset = {
mcpcia_inb,
mcpcia_inw,
mcpcia_inl,
mcpcia_outb,
mcpcia_outw,
mcpcia_outl,
mcpcia_readb,
mcpcia_readw,
mcpcia_readl,
mcpcia_writeb,
mcpcia_writew,
mcpcia_writel,
mcpcia_maxdevs,
mcpcia_cfgreadb,
mcpcia_cfgreadw,
mcpcia_cfgreadl,
mcpcia_cfgwriteb,
mcpcia_cfgwritew,
mcpcia_cfgwritel,
};
#define MCPCIA_NMBR(port) ((port >> 30) & 0x3)
#define MCPCIA_INST(port) mcpcias[MCPCIA_NMBR(port)]
#define MCPCIA_ADDR(port) (port & 0x3fffffff)
static u_int8_t
mcpcia_inb(u_int32_t port)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(port));
if (port < (1 << 16)) {
if (mcpcia_eisa == NULL) {
return (0xff);
}
return SPARSE_READ_BYTE(mcpcia_eisa->io_base, port);
}
return SPARSE_READ_BYTE(sc->io_base, MCPCIA_ADDR(port));
}
static u_int16_t
mcpcia_inw(u_int32_t port)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(port));
if (port < (1 << 16)) {
if (mcpcia_eisa == NULL) {
return (0xffff);
}
return SPARSE_READ_WORD(mcpcia_eisa->io_base, port);
}
return SPARSE_READ_WORD(sc->io_base, MCPCIA_ADDR(port));
}
static u_int32_t
mcpcia_inl(u_int32_t port)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(port));
return SPARSE_READ_LONG(sc->io_base, MCPCIA_ADDR(port));
}
static void
mcpcia_outb(u_int32_t port, u_int8_t data)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(port));
if (port < (1 << 16)) {
if (mcpcia_eisa)
SPARSE_WRITE_BYTE(mcpcia_eisa->io_base, port, data);
} else {
SPARSE_WRITE_BYTE(sc->io_base, MCPCIA_ADDR(port), data);
}
alpha_mb();
}
static void
mcpcia_outw(u_int32_t port, u_int16_t data)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(port));
if (port < (1 << 16)) {
if (mcpcia_eisa)
SPARSE_WRITE_WORD(mcpcia_eisa->io_base, port, data);
} else {
SPARSE_WRITE_WORD(sc->io_base, MCPCIA_ADDR(port), data);
}
alpha_mb();
}
static void
mcpcia_outl(u_int32_t port, u_int32_t data)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(port));
SPARSE_WRITE_LONG(sc->io_base, MCPCIA_ADDR(port), data);
alpha_mb();
}
static u_int8_t
mcpcia_readb(u_int32_t pa)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(pa));
if (pa < (8 << 20)) {
if (mcpcia_eisa == NULL) {
return (0xff);
}
return SPARSE_READ_BYTE(mcpcia_eisa->smem_base, pa);
}
return SPARSE_READ_BYTE(sc->smem_base, MCPCIA_ADDR(pa));
}
static u_int16_t
mcpcia_readw(u_int32_t pa)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(pa));
if (pa < (8 << 20)) {
if (mcpcia_eisa == NULL) {
return (0xffff);
}
return SPARSE_READ_WORD(mcpcia_eisa->smem_base, pa);
}
return SPARSE_READ_WORD(sc->smem_base, MCPCIA_ADDR(pa));
}
static u_int32_t
mcpcia_readl(u_int32_t pa)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(pa));
return SPARSE_READ_LONG(sc->smem_base, MCPCIA_ADDR(pa));
}
static void
mcpcia_writeb(u_int32_t pa, u_int8_t data)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(pa));
if (pa < (8 << 20)) {
if (mcpcia_eisa)
SPARSE_WRITE_BYTE(mcpcia_eisa->smem_base, pa, data);
} else {
SPARSE_WRITE_BYTE(sc->smem_base, MCPCIA_ADDR(pa), data);
}
alpha_mb();
}
static void
mcpcia_writew(u_int32_t pa, u_int16_t data)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(pa));
if (pa < (8 << 20)) {
if (mcpcia_eisa)
SPARSE_WRITE_WORD(mcpcia_eisa->smem_base, pa, data);
} else {
SPARSE_WRITE_WORD(sc->smem_base, MCPCIA_ADDR(pa), data);
}
alpha_mb();
}
static void
mcpcia_writel(u_int32_t pa, u_int32_t data)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(MCPCIA_INST(pa));
SPARSE_WRITE_LONG(sc->smem_base, MCPCIA_ADDR(pa), data);
alpha_mb();
}
static int
mcpcia_maxdevs(u_int b)
{
return (MCPCIA_MAXDEV);
}
static u_int32_t mcpcia_cfgread(u_int, u_int, u_int, u_int, u_int, int);
static void mcpcia_cfgwrite(u_int, u_int, u_int, u_int, u_int, int, u_int32_t);
static u_int32_t
mcpcia_cfgread(u_int bh, u_int bus, u_int slot, u_int func, u_int off, int sz)
{
device_t dev;
struct mcpcia_softc *sc;
u_int32_t *dp, data, rvp;
u_int64_t paddr;
rvp = data = ~0;
if (bh > 3)
return (data);
dev = mcpcias[bh];
if (dev == (device_t) 0) {
return (data);
}
sc = MCPCIA_SOFTC(dev);
/*
* The bus number being passed is the pci instance number- not
* the actual pci bus number. FreeBSD farts bad on this one.
*/
bus = 0; /* No secondaries for the moment */
/*
* There's nothing in slot 0 on a primary bus.
*/
if (bus == 0 && (slot < 1 || slot >= MCPCIA_MAXDEV))
return (data);
paddr = bus << 21;
paddr |= slot << 16;
paddr |= func << 13;
paddr |= ((sz - 1) << 3);
paddr |= ((unsigned long) ((off >> 2) << 7));
paddr |= MCPCIA_PCI_CONF;
paddr |= sc->sysbase;
dp = (u_int32_t *)KV(paddr);
#if 0
printf("CFGREAD MID %d %d.%d.%d sz %d off %d -> paddr 0x%x",
mcbus_get_mid(dev), bus , slot, func, sz, off, paddr);
#endif
if (badaddr(dp, sizeof (*dp)) == 0) {
data = *dp;
}
if (data != ~0) {
if (sz == 1) {
rvp = SPARSE_BYTE_EXTRACT(off, data);
} else if (sz == 2) {
rvp = SPARSE_WORD_EXTRACT(off, data);
} else {
rvp = data;
}
} else {
rvp = data;
}
#if 0
printf(" data 0x%x -> 0x%x\n", data, rvp);
#endif
return (rvp);
}
static void
mcpcia_cfgwrite(u_int bh, u_int bus, u_int slot, u_int func, u_int off,
int sz, u_int32_t data)
{
device_t dev;
struct mcpcia_softc *sc;
u_int32_t *dp;
u_int64_t paddr;
if (bh > 3)
return;
dev = mcpcias[bh];
if (dev == (device_t) 0) {
return;
}
sc = MCPCIA_SOFTC(dev);
bus = 0; /* No secondaries for the moment */
/*
* There's nothing in slot 0 on a primary bus.
*/
if (bus != 0 && (slot < 1 || slot >= MCPCIA_MAXDEV))
return;
paddr = bus << 21;
paddr |= slot << 16;
paddr |= func << 13;
paddr |= ((sz - 1) << 3);
paddr |= ((unsigned long) ((off >> 2) << 7));
paddr |= MCPCIA_PCI_CONF;
paddr |= sc->sysbase;
dp = (u_int32_t *)KV(paddr);
if (badaddr(dp, sizeof (*dp)) == 0) {
u_int32_t new_data;
if (sz == 1) {
new_data = SPARSE_BYTE_INSERT(off, data);
} else if (sz == 2) {
new_data = SPARSE_WORD_INSERT(off, data);
} else {
new_data = data;
}
#if 0
printf("CFGWRITE MID%d %d.%d.%d sz %d off %d paddr %lx, data %x new_data %x\n",
mcbus_get_mid(dev), bus , slot, func, sz, off, paddr, data, new_data);
#endif
*dp = new_data;
}
}
static u_int8_t
mcpcia_cfgreadb(u_int h, u_int b, u_int s, u_int f, u_int r)
{
return (u_int8_t) mcpcia_cfgread(h, b, s, f, r, 1);
}
static u_int16_t
mcpcia_cfgreadw(u_int h, u_int b, u_int s, u_int f, u_int r)
{
return (u_int16_t) mcpcia_cfgread(h, b, s, f, r, 2);
}
static u_int32_t
mcpcia_cfgreadl(u_int h, u_int b, u_int s, u_int f, u_int r)
{
return mcpcia_cfgread(h, b, s, f, r, 4);
}
static void
mcpcia_cfgwriteb(u_int h, u_int b, u_int s, u_int f, u_int r, u_int8_t data)
{
mcpcia_cfgwrite(h, b, s, f, r, 1, (u_int32_t) data);
}
static void
mcpcia_cfgwritew(u_int h, u_int b, u_int s, u_int f, u_int r, u_int16_t data)
{
mcpcia_cfgwrite(h, b, s, f, r, 2, (u_int32_t) data);
}
static void
mcpcia_cfgwritel(u_int h, u_int b, u_int s, u_int f, u_int r, u_int32_t data)
{
mcpcia_cfgwrite(h, b, s, f, r, 4, (u_int32_t) data);
}
static int
mcpcia_probe(device_t dev)
{
device_t child;
int unit;
struct mcpcia_softc *xc, *sc = MCPCIA_SOFTC(dev);
unit = device_get_unit(dev);
if (mcpcias[unit]) {
printf("%s: already attached\n", device_get_nameunit(dev));
return EEXIST;
}
sc->mcpcia_inst = unit;
if ((xc = mcpcia_root) == NULL) {
mcpcia_root = sc;
} else {
while (xc->next)
xc = xc->next;
xc->next = sc;
}
sc->dev = mcpcias[unit] = dev;
/* PROBE ? */
device_set_desc(dev, "MCPCIA PCI Adapter");
if (unit == 0) {
pci_init_resources();
}
child = device_add_child(dev, "pcib", unit);
device_set_ivars(child, &sc->mcpcia_inst);
return (0);
}
static int
mcpcia_attach(device_t dev)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(dev);
device_t p = device_get_parent(dev);
vm_offset_t regs;
u_int32_t ctl;
int mid, gid, rval;
void *intr;
chipset = mcpcia_chipset;
mid = mcbus_get_mid(dev);
gid = mcbus_get_gid(dev);
sc->sysbase = MCBUS_IOSPACE |
(((u_int64_t) gid) << MCBUS_GID_SHIFT) | \
(((u_int64_t) mid) << MCBUS_MID_SHIFT);
regs = (vm_offset_t) KV(sc->sysbase);
sc->dmem_base = regs + MCPCIA_PCI_DENSE;
sc->smem_base = regs + MCPCIA_PCI_SPARSE;
sc->io_base = regs + MCPCIA_PCI_IOSPACE;
/*
* Disable interrupts and clear errors prior to probing
*/
REGVAL(MCPCIA_INT_MASK0(sc)) = 0;
REGVAL(MCPCIA_INT_MASK1(sc)) = 0;
REGVAL(MCPCIA_CAP_ERR(sc)) = 0xFFFFFFFF;
alpha_mb();
/*
* Say who we are
*/
ctl = REGVAL(MCPCIA_PCI_REV(sc));
printf("%s: Horse Revision %d, %s Handed Saddle Revision %d,"
" CAP Revision %d\n", device_get_nameunit(dev), HORSE_REV(ctl),
(SADDLE_TYPE(ctl) & 1)? "Right": "Left", SADDLE_REV(ctl),
CAP_REV(ctl));
/*
* See if we're the fella with the EISA bus...
*/
if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(sc)))) {
mcpcia_eisa = sc;
}
/*
* Set up DMA stuff here.
*/
mcpcia_dma_init(sc);
/*
* Register our interrupt service requirements with out parent.
*/
rval =
BUS_SETUP_INTR(p, dev, NULL, INTR_TYPE_MISC, mcpcia_intr, 0, &intr);
if (rval == 0) {
if (sc == mcpcia_eisa) {
printf("Attaching Real Console\n");
dec_kn300_cons_init();
/*
* Enable EISA interrupts.
*/
mcpcia_enable_intr(sc, 16);
}
bus_generic_attach(dev);
}
return (rval);
}
static void
mcpcia_enable_intr(struct mcpcia_softc *sc, int irq)
{
alpha_mb();
REGVAL(MCPCIA_INT_MASK0(sc)) |= (1 << irq);
alpha_mb();
}
static void
mcpcia_disable_intr(struct mcpcia_softc *sc, int irq)
{
alpha_mb();
REGVAL(MCPCIA_INT_MASK0(sc)) &= ~(1 << irq);
alpha_mb();
}
static int
mcpcia_setup_intr(device_t dev, device_t child, struct resource *ir, int flags,
driver_intr_t *intr, void *arg, void **cp)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(dev);
int slot, mid, gid, birq, irq, error, intpin, h;
intpin = pci_get_intpin(child);
if (intpin == 0) {
/* No IRQ used */
return (0);
}
if (intpin < 1 || intpin > 4) {
/* Bad IRQ */
return (ENXIO);
}
slot = pci_get_slot(child);
mid = mcbus_get_mid(dev);
gid = mcbus_get_gid(dev);
if (mid == 5 && slot == 1) {
irq = 16; /* MID 5, slot 1, is the internal NCR 53c810 */
} else if (slot >= 2 && slot <= 5) {
irq = (slot - 2) * 4;
} else {
device_printf(child, "wierd slot number (%d); can't make irq\n",
slot);
return (ENXIO);
}
error = rman_activate_resource(ir);
if (error)
return error;
/*
* We now construct a vector as the hardware would, unless
* this is the internal NCR 53c810 interrupt.
*/
if (irq == 16) {
h = MCPCIA_VEC_NCR;
} else {
h = MCPCIA_VEC_PCI + ((mid - 4) * MCPCIA_VECWIDTH_PER_MCPCIA) +
(slot * MCPCIA_VECWIDTH_PER_SLOT) +
((intpin - 1) * MCPCIA_VECWIDTH_PER_INTPIN);
}
birq = irq + INTRCNT_KN300_IRQ;
error = alpha_setup_intr(h, intr, arg, cp, &intrcnt[birq]);
if (error)
return error;
mcpcia_enable_intr(sc, irq);
device_printf(child, "interrupting at IRQ 0x%x int%c (vec 0x%x)\n",
irq, intpin - 1 + 'A' , h);
return (0);
}
static int
mcpcia_teardown_intr(device_t dev, device_t child, struct resource *i, void *c)
{
struct mcpcia_softc *sc = MCPCIA_SOFTC(dev);
int slot, mid, irq;
slot = pci_get_slot(child);
mid = mcbus_get_mid(dev);
if (mid == 5 && slot == 1) {
irq = 16;
} else if (slot >= 2 && slot <= 5) {
irq = (slot - 2) * 4;
} else {
return (ENXIO);
}
mcpcia_disable_intr(sc, irq);
alpha_teardown_intr(c);
return (rman_deactivate_resource(i));
}
static void
mcpcia_sgmap_map(void *arg, vm_offset_t ba, vm_offset_t pa)
{
u_int64_t *sgtable = arg;
int index = alpha_btop(ba - MCPCIA_ISA_SG_MAPPED_BASE);
if (pa) {
if (pa > (1L<<32))
panic("mcpcia_sgmap_map: can't map address 0x%lx", pa);
sgtable[index] = ((pa >> 13) << 1) | 1;
} else {
sgtable[index] = 0;
}
alpha_mb();
MCPCIA_SGTLB_INVALIDATE(mcpcia_eisa);
}
static void
mcpcia_dma_init(struct mcpcia_softc *sc)
{
/*
* Disable all windows first.
*/
REGVAL(MCPCIA_W0_BASE(sc)) = 0;
REGVAL(MCPCIA_W1_BASE(sc)) = 0;
REGVAL(MCPCIA_W2_BASE(sc)) = 0;
REGVAL(MCPCIA_W3_BASE(sc)) = 0;
REGVAL(MCPCIA_T0_BASE(sc)) = 0;
REGVAL(MCPCIA_T1_BASE(sc)) = 0;
REGVAL(MCPCIA_T2_BASE(sc)) = 0;
REGVAL(MCPCIA_T3_BASE(sc)) = 0;
alpha_mb();
/*
* Set up window 0 as an 8MB SGMAP-mapped window starting at 8MB.
* Do this only for the EISA carrying MCPCIA. Partly because
* there's only one chipset sgmap thingie.
*/
if (sc == mcpcia_eisa) {
void *sgtable;
REGVAL(MCPCIA_W0_MASK(sc)) = MCPCIA_WMASK_8M;
sgtable = contigmalloc(8192, M_DEVBUF,
M_NOWAIT, 0, 1L<<34, 32<<10, 1L<<34);
if (sgtable == NULL) {
panic("mcpcia_dma_init: cannot allocate sgmap");
/* NOTREACHED */
}
REGVAL(MCPCIA_T0_BASE(sc)) =
pmap_kextract((vm_offset_t)sgtable) >> MCPCIA_TBASEX_SHIFT;
alpha_mb();
REGVAL(MCPCIA_W0_BASE(sc)) = MCPCIA_WBASE_EN |
MCPCIA_WBASE_SG | MCPCIA_ISA_SG_MAPPED_BASE;
alpha_mb();
MCPCIA_SGTLB_INVALIDATE(sc);
chipset.sgmap = sgmap_map_create(MCPCIA_ISA_SG_MAPPED_BASE,
MCPCIA_ISA_SG_MAPPED_BASE + MCPCIA_ISA_SG_MAPPED_SIZE - 1,
mcpcia_sgmap_map, sgtable);
}
/*
* Set up window 1 as a 2 GB Direct-mapped window starting at 2GB.
*/
REGVAL(MCPCIA_W1_MASK(sc)) = MCPCIA_WMASK_2G;
REGVAL(MCPCIA_T1_BASE(sc)) = 0;
alpha_mb();
REGVAL(MCPCIA_W1_BASE(sc)) =
MCPCIA_DIRECT_MAPPED_BASE | MCPCIA_WBASE_EN;
alpha_mb();
/*
* When we get around to redoing the 'chipset' stuff to have more
* than one sgmap handler...
*/
#if 0
/*
* Set up window 2 as a 1G SGMAP-mapped window starting at 1G.
*/
REGVAL(MCPCIA_W2_MASK(sc)) = MCPCIA_WMASK_1G;
REGVAL(MCPCIA_T2_BASE(sc)) =
ccp->cc_pci_sgmap.aps_ptpa >> MCPCIA_TBASEX_SHIFT;
alpha_mb();
REGVAL(MCPCIA_W2_BASE(sc)) =
MCPCIA_WBASE_EN | MCPCIA_WBASE_SG | MCPCIA_PCI_SG_MAPPED_BASE;
alpha_mb();
#endif
/* XXX XXX BEGIN XXX XXX */
{ /* XXX */
alpha_XXX_dmamap_or = MCPCIA_DIRECT_MAPPED_BASE;/* XXX */
} /* XXX */
/* XXX XXX END XXX XXX */
}
/*
*/
static void
mcpcia_intr(void *arg)
{
unsigned long vec = (unsigned long) arg;
/*
* Check for I2C interrupts. These are technically within
* the PCI vector range, but no PCI device should ever map
* to them.
*/
if (vec == MCPCIA_I2C_CVEC) {
printf("i2c: controller interrupt\n");
return;
}
if (vec == MCPCIA_I2C_BVEC) {
printf("i2c: bus interrupt\n");
return;
}
alpha_dispatch_intr(NULL, vec);
}
DRIVER_MODULE(mcpcia, mcbus, mcpcia_driver, mcpcia_devclass, 0, 0);
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