FreeBSD-5.3/sys/sparc64/isa/isa.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: src/sys/sparc64/isa/isa.c,v 1.13 2004/08/12 17:41:32 marius Exp $
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <isa/isareg.h>
#include <isa/isavar.h>
#include <isa/isa_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/openfirm.h>
#include <machine/resource.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <sparc64/pci/ofw_pci.h>
#include <sparc64/isa/ofw_isa.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;
static u_int64_t isa_io_base;
static u_int64_t isa_io_limit;
static u_int64_t isa_mem_base;
static u_int64_t isa_mem_limit;
device_t isa_bus_device;
static phandle_t isab_node;
static ofw_pci_intr_t isa_ino[8];
struct ofw_bus_iinfo isa_iinfo;
/*
* 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] != PCI_INVALID_IRQ) {
pending |= (OFW_PCI_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;
ofw_isa_intr_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_bus_get_node(bridge);
nbr = OF_getprop_alloc(isab_node, "ranges", sizeof(*br), (void **)&br);
if (nbr <= 0)
panic("isa_init: cannot get bridge range property");
ofw_bus_setup_iinfo(isab_node, &isa_iinfo, sizeof(ofw_isa_intr_t));
/*
* This is really a bad kludge; however, it is needed to provide
* isa_irq_pending(), which is unfortunately still used by some
* drivers.
*/
for (i = 0; i < 8; i++)
isa_ino[i] = PCI_INVALID_IRQ;
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_isa_route_intr(bridge, node, &isa_iinfo,
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 = OFW_PCI_GET_BUS_HANDLE(bridge,
SYS_RES_IOPORT, 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 = OFW_PCI_GET_BUS_HANDLE(bridge,
SYS_RES_MEMORY, 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 == PCI_INVALID_IRQ)
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.
*/
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 == PCI_INVALID_IRQ)
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 == PCI_INVALID_IRQ)
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));
}