344 lines
9.0 KiB
C
344 lines
9.0 KiB
C
/*-
|
|
* Copyright (c) 1998 Doug Rabson
|
|
* Copyright (c) 2001 Thomas Moestl <tmm@FreeBSD.org>
|
|
* 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.
|
|
*
|
|
* from: FreeBSD: src/sys/alpha/isa/isa.c,v 1.26 2001/07/11
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/bus.h>
|
|
#include <machine/bus.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/interrupt.h>
|
|
|
|
#include <isa/isareg.h>
|
|
#include <isa/isavar.h>
|
|
#include <isa/isa_common.h>
|
|
|
|
#include <pci/pcireg.h>
|
|
#include <pci/pcivar.h>
|
|
|
|
#include <ofw/ofw_pci.h>
|
|
#include <ofw/openfirm.h>
|
|
|
|
#include <machine/intr_machdep.h>
|
|
#include <machine/ofw_bus.h>
|
|
#include <machine/resource.h>
|
|
|
|
#include <sparc64/pci/ofw_pci.h>
|
|
#include <sparc64/isa/ofw_isa.h>
|
|
|
|
#include "sparcbus_if.h"
|
|
|
|
/* There can be only one ISA bus, so it is safe to use globals. */
|
|
bus_space_tag_t isa_io_bt = NULL;
|
|
bus_space_handle_t isa_io_hdl;
|
|
bus_space_tag_t isa_mem_bt = NULL;
|
|
bus_space_handle_t isa_mem_hdl;
|
|
|
|
u_int64_t isa_io_base;
|
|
u_int64_t isa_io_limit;
|
|
u_int64_t isa_mem_base;
|
|
u_int64_t isa_mem_limit;
|
|
|
|
device_t isa_bus_device;
|
|
|
|
static phandle_t isab_node;
|
|
static u_int32_t isa_ino[8];
|
|
|
|
/*
|
|
* XXX: This is really partly partly PCI-specific, but unfortunately is
|
|
* differently enough to have to duplicate it here...
|
|
*/
|
|
#define ISAB_RANGE_PHYS(r) \
|
|
(((u_int64_t)(r)->phys_mid << 32) | (u_int64_t)(r)->phys_lo)
|
|
#define ISAB_RANGE_SPACE(r) (((r)->phys_hi >> 24) & 0x03)
|
|
|
|
#define ISAR_SPACE_IO 0x01
|
|
#define ISAR_SPACE_MEM 0x02
|
|
|
|
#define INRANGE(x, start, end) ((x) >= (start) && (x) <= (end))
|
|
|
|
static int isa_route_intr_res(device_t, u_long, u_long);
|
|
|
|
intrmask_t
|
|
isa_irq_pending(void)
|
|
{
|
|
intrmask_t pending;
|
|
int i;
|
|
|
|
/* XXX: Is this correct? */
|
|
for (i = 7, pending = 0; i >= 0; i--) {
|
|
pending <<= 1;
|
|
if (isa_ino[i] != ORIR_NOTFOUND) {
|
|
pending |= (SPARCBUS_INTR_PENDING(isa_bus_device,
|
|
isa_ino[i]) == 0) ? 0 : 1;
|
|
}
|
|
}
|
|
return (pending);
|
|
}
|
|
|
|
void
|
|
isa_init(device_t dev)
|
|
{
|
|
device_t bridge;
|
|
phandle_t node;
|
|
u_int32_t ino;
|
|
struct isa_ranges *br;
|
|
int nbr, i;
|
|
|
|
/* The parent of the bus must be a PCI-ISA bridge. */
|
|
bridge = device_get_parent(dev);
|
|
isab_node = ofw_pci_node(bridge);
|
|
nbr = OF_getprop_alloc(isab_node, "ranges", sizeof(*br), (void **)&br);
|
|
if (nbr <= 0)
|
|
panic("isa_init: cannot get bridge range property");
|
|
/*
|
|
* This is really a bad kluge; however, it is needed to provide
|
|
* isa_irq_pending().
|
|
*/
|
|
for (i = 0; i < 8; i++)
|
|
isa_ino[i] = ORIR_NOTFOUND;
|
|
for (node = OF_child(isab_node); node != 0; node = OF_peer(node)) {
|
|
if (OF_getprop(node, "interrupts", &ino, sizeof(ino)) == -1)
|
|
continue;
|
|
if (ino > 7)
|
|
panic("isa_init: XXX: ino too large");
|
|
isa_ino[ino] = ofw_bus_route_intr(node, ino);
|
|
}
|
|
|
|
for (nbr -= 1; nbr >= 0; nbr--) {
|
|
switch(ISAB_RANGE_SPACE(br + nbr)) {
|
|
case ISAR_SPACE_IO:
|
|
/* This is probably always 0. */
|
|
isa_io_base = ISAB_RANGE_PHYS(&br[nbr]);
|
|
isa_io_limit = br[nbr].size;
|
|
isa_io_hdl = SPARCBUS_GET_BUS_HANDLE(bridge, SBBT_IO,
|
|
isa_io_base, &isa_io_bt);
|
|
break;
|
|
case ISAR_SPACE_MEM:
|
|
/* This is probably always 0. */
|
|
isa_mem_base = ISAB_RANGE_PHYS(&br[nbr]);
|
|
isa_mem_limit = br[nbr].size;
|
|
isa_mem_hdl = SPARCBUS_GET_BUS_HANDLE(bridge, SBBT_MEM,
|
|
isa_mem_base, &isa_mem_bt);
|
|
break;
|
|
}
|
|
}
|
|
free(br, M_OFWPROP);
|
|
}
|
|
|
|
static int
|
|
isa_route_intr_res(device_t bus, u_long start, u_long end)
|
|
{
|
|
int res;
|
|
|
|
if (start != end) {
|
|
panic("isa_route_intr_res: allocation of interrupt range not "
|
|
"supported (0x%lx - 0x%lx)", start, end);
|
|
}
|
|
if (start > 7)
|
|
panic("isa_route_intr_res: start out of isa range");
|
|
res = isa_ino[start];
|
|
if (res == 255)
|
|
device_printf(bus, "could not map interrupt %d\n", res);
|
|
return (res);
|
|
}
|
|
|
|
struct resource *
|
|
isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
|
|
u_long start, u_long end, u_long count, u_int flags)
|
|
{
|
|
/*
|
|
* Consider adding a resource definition. We allow rid 0-1 for
|
|
* irq and drq, 0-3 for memory and 0-7 for ports which is
|
|
* sufficient for isapnp.
|
|
*/
|
|
int passthrough = (device_get_parent(child) != bus);
|
|
int isdefault = (start == 0UL && end == ~0UL);
|
|
struct isa_device* idev = DEVTOISA(child);
|
|
struct resource_list *rl = &idev->id_resources;
|
|
struct resource_list_entry *rle;
|
|
u_long base, limit;
|
|
|
|
if (!passthrough && !isdefault) {
|
|
rle = resource_list_find(rl, type, *rid);
|
|
if (!rle) {
|
|
if (*rid < 0)
|
|
return 0;
|
|
switch (type) {
|
|
case SYS_RES_IRQ:
|
|
if (*rid >= ISA_NIRQ)
|
|
return 0;
|
|
break;
|
|
case SYS_RES_DRQ:
|
|
if (*rid >= ISA_NDRQ)
|
|
return 0;
|
|
break;
|
|
case SYS_RES_MEMORY:
|
|
if (*rid >= ISA_NMEM)
|
|
return 0;
|
|
break;
|
|
case SYS_RES_IOPORT:
|
|
if (*rid >= ISA_NPORT)
|
|
return 0;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
resource_list_add(rl, type, *rid, start, end, count);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Add the base, change default allocations to be between base and
|
|
* limit, and reject allocations if a resource type is not enabled.
|
|
*/
|
|
base = limit = 0;
|
|
switch(type) {
|
|
case SYS_RES_MEMORY:
|
|
if (isa_mem_bt == NULL)
|
|
return (NULL);
|
|
base = isa_mem_base;
|
|
limit = base + isa_mem_limit;
|
|
break;
|
|
case SYS_RES_IOPORT:
|
|
if (isa_io_bt == NULL)
|
|
return (NULL);
|
|
base = isa_io_base;
|
|
limit = base + isa_io_limit;
|
|
break;
|
|
case SYS_RES_IRQ:
|
|
if (isdefault && passthrough)
|
|
panic("isa_alloc_resource: cannot pass through default "
|
|
"irq allocation");
|
|
if (!isdefault) {
|
|
start = end = isa_route_intr_res(bus, start, end);
|
|
if (start == 255)
|
|
return (NULL);
|
|
}
|
|
break;
|
|
default:
|
|
panic("isa_alloc_resource: unsupported resource type %d", type);
|
|
}
|
|
if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
|
|
start = ulmin(start + base, limit);
|
|
end = ulmin(end + base, limit);
|
|
}
|
|
|
|
/*
|
|
* This inlines a modified resource_list_alloc(); this is needed
|
|
* because the resources need to have offsets added to them, which
|
|
* cannot be done beforehand without patching the resource list entries
|
|
* (which is ugly).
|
|
*/
|
|
if (passthrough) {
|
|
return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
|
|
type, rid, start, end, count, flags));
|
|
}
|
|
|
|
rle = resource_list_find(rl, type, *rid);
|
|
if (rle == NULL)
|
|
return (NULL); /* no resource of that type/rid */
|
|
|
|
if (rle->res != NULL)
|
|
panic("isa_alloc_resource: resource entry is busy");
|
|
|
|
if (isdefault) {
|
|
start = rle->start;
|
|
count = ulmax(count, rle->count);
|
|
end = ulmax(rle->end, start + count - 1);
|
|
switch (type) {
|
|
case SYS_RES_MEMORY:
|
|
case SYS_RES_IOPORT:
|
|
start += base;
|
|
end += base;
|
|
if (!INRANGE(start, base, limit) ||
|
|
!INRANGE(end, base, limit))
|
|
return (NULL);
|
|
break;
|
|
case SYS_RES_IRQ:
|
|
start = end = isa_route_intr_res(bus, start, end);
|
|
if (start == 255)
|
|
return (NULL);
|
|
break;
|
|
}
|
|
}
|
|
|
|
rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
|
|
type, rid, start, end, count, flags);
|
|
|
|
/*
|
|
* Record the new range.
|
|
*/
|
|
if (rle->res != NULL) {
|
|
rle->start = rman_get_start(rle->res) - base;
|
|
rle->end = rman_get_end(rle->res) - base;
|
|
rle->count = count;
|
|
}
|
|
|
|
return (rle->res);
|
|
}
|
|
|
|
int
|
|
isa_release_resource(device_t bus, device_t child, int type, int rid,
|
|
struct resource *res)
|
|
{
|
|
struct isa_device* idev = DEVTOISA(child);
|
|
struct resource_list *rl = &idev->id_resources;
|
|
|
|
return (resource_list_release(rl, bus, child, type, rid, res));
|
|
}
|
|
|
|
int
|
|
isa_setup_intr(device_t dev, device_t child,
|
|
struct resource *irq, int flags,
|
|
driver_intr_t *intr, void *arg, void **cookiep)
|
|
{
|
|
|
|
/*
|
|
* Just pass through. This is going to be handled by either one of
|
|
* the parent PCI buses or the nexus device.
|
|
* The interrupt was routed at allocation time.
|
|
*/
|
|
return (BUS_SETUP_INTR(device_get_parent(dev), child, irq, flags, intr,
|
|
arg, cookiep));
|
|
}
|
|
|
|
int
|
|
isa_teardown_intr(device_t dev, device_t child,
|
|
struct resource *irq, void *cookie)
|
|
{
|
|
|
|
return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, irq, cookie));
|
|
}
|