348 lines
9.3 KiB
C
348 lines
9.3 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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* Copyright (c) 2001 Thomas Moestl <tmm@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: FreeBSD: src/sys/alpha/isa/isa.c,v 1.26 2001/07/11
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/rman.h>
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#include <sys/interrupt.h>
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#include <isa/isareg.h>
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#include <isa/isavar.h>
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#include <isa/isa_common.h>
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#include <pci/pcireg.h>
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#include <pci/pcivar.h>
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#include <ofw/ofw_pci.h>
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#include <ofw/openfirm.h>
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#include <machine/intr_machdep.h>
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#include <machine/resource.h>
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#include <sparc64/pci/ofw_pci.h>
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#include <sparc64/isa/ofw_isa.h>
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#include "sparcbus_if.h"
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/* There can be only one ISA bus, so it is safe to use globals. */
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bus_space_tag_t isa_io_bt = NULL;
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bus_space_handle_t isa_io_hdl;
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bus_space_tag_t isa_mem_bt = NULL;
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bus_space_handle_t isa_mem_hdl;
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u_int64_t isa_io_base;
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u_int64_t isa_io_limit;
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u_int64_t isa_mem_base;
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u_int64_t isa_mem_limit;
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device_t isa_bus_device;
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static struct ofw_pci_register isab_reg;
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static struct ofw_pci_imap *isab_imap;
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static int isab_nimap;
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static struct ofw_pci_imap_msk isab_imap_msk;
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static phandle_t isab_node;
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/*
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* XXX: This is really partly partly PCI-specific, but unfortunately is
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* differently enough to have to duplicate it here...
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*/
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#define ISAB_RANGE_PHYS(r) \
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(((u_int64_t)(r)->phys_mid << 32) | (u_int64_t)(r)->phys_lo)
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#define ISAB_RANGE_SPACE(r) (((r)->phys_hi >> 24) & 0x03)
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#define ISAR_SPACE_IO 0x01
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#define ISAR_SPACE_MEM 0x02
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#define INRANGE(x, start, end) ((x) >= (start) && (x) <= (end))
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static int isa_route_intr_res(device_t, u_long, u_long);
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static int isa_ino[8];
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intrmask_t
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isa_irq_pending(void)
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{
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intrmask_t pending;
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int i;
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/* XXX: Is this correct? */
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for (i = 7, pending = 0; i >= 0; i--) {
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pending <<= 1;
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if (isa_ino[i] != 255) {
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pending |= (SPARCBUS_INTR_PENDING(isa_bus_device,
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isa_ino[i]) == 0) ? 0 : 1;
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}
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}
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return (pending);
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}
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void
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isa_init(device_t dev)
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{
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device_t bridge;
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phandle_t node;
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struct isa_ranges *br;
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int nbr, i;
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/* The parent of the bus must be a PCI-ISA bridge. */
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bridge = device_get_parent(dev);
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isab_node = ofw_pci_find_node(pci_get_bus(bridge), pci_get_slot(bridge),
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pci_get_function(bridge));
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if (OF_getprop(isab_node, "reg", &isab_reg, sizeof(isab_reg)) < 0)
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panic("isa_init: cannot get bridge reg property");
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nbr = OF_getprop_alloc(isab_node, "ranges", sizeof(*br), (void **)&br);
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if (nbr <= 0)
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panic("isa_init: cannot get bridge range property");
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node = isab_node;
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isab_nimap = ofw_pci_find_imap(node, &isab_imap, &isab_imap_msk);
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if (isab_nimap == -1)
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panic("isa_init: could not find interrupt-map");
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for (i = 0; i < 8; i++) {
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isa_ino[i] = ofw_pci_route_intr2(i, &isab_reg, isab_imap,
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isab_nimap, &isab_imap_msk);
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}
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for (nbr -= 1; nbr >= 0; nbr--) {
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switch(ISAB_RANGE_SPACE(br + nbr)) {
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case ISAR_SPACE_IO:
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/* This is probably always 0. */
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isa_io_base = ISAB_RANGE_PHYS(&br[nbr]);
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isa_io_limit = br[nbr].size;
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isa_io_hdl = SPARCBUS_GET_BUS_HANDLE(bridge, SBBT_IO,
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isa_io_base, &isa_io_bt);
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break;
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case ISAR_SPACE_MEM:
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/* This is probably always 0. */
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isa_mem_base = ISAB_RANGE_PHYS(&br[nbr]);
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isa_mem_limit = br[nbr].size;
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isa_mem_hdl = SPARCBUS_GET_BUS_HANDLE(bridge, SBBT_MEM,
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isa_mem_base, &isa_mem_bt);
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break;
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}
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}
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free(br, M_OFWPROP);
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}
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static int
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isa_route_intr_res(device_t bus, u_long start, u_long end)
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{
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int res;
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if (start != end) {
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panic("isa_route_intr_res: allocation of interrupt range not "
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"supported (0x%lx - 0x%lx)", start, end);
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}
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res = ofw_pci_route_intr2(start, &isab_reg, isab_imap, isab_nimap,
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&isab_imap_msk);
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if (res == 255)
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device_printf(bus, "could not map interrupt %d\n", res);
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return (res);
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}
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struct resource *
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isa_alloc_resource(device_t bus, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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/*
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* Consider adding a resource definition. We allow rid 0-1 for
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* irq and drq, 0-3 for memory and 0-7 for ports which is
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* sufficient for isapnp.
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*/
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int passthrough = (device_get_parent(child) != bus);
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int isdefault = (start == 0UL && end == ~0UL);
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struct isa_device* idev = DEVTOISA(child);
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struct resource_list *rl = &idev->id_resources;
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struct resource_list_entry *rle;
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u_long base, limit;
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if (!passthrough && !isdefault) {
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rle = resource_list_find(rl, type, *rid);
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if (!rle) {
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if (*rid < 0)
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return 0;
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switch (type) {
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case SYS_RES_IRQ:
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if (*rid >= ISA_NIRQ)
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return 0;
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break;
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case SYS_RES_DRQ:
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if (*rid >= ISA_NDRQ)
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return 0;
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break;
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case SYS_RES_MEMORY:
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if (*rid >= ISA_NMEM)
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return 0;
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break;
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case SYS_RES_IOPORT:
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if (*rid >= ISA_NPORT)
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return 0;
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break;
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default:
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return 0;
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}
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resource_list_add(rl, type, *rid, start, end, count);
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}
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}
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/*
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* Add the base, change default allocations to be between base and
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* limit, and reject allocations if a resource type is not enabled.
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*/
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base = limit = 0;
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switch(type) {
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case SYS_RES_MEMORY:
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if (isa_mem_bt == NULL)
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return (NULL);
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base = isa_mem_base;
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limit = base + isa_mem_limit;
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break;
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case SYS_RES_IOPORT:
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if (isa_io_bt == NULL)
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return (NULL);
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base = isa_io_base;
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limit = base + isa_io_limit;
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break;
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case SYS_RES_IRQ:
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if (isdefault && passthrough)
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panic("isa_alloc_resource: cannot pass through default "
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"irq allocation");
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if (!isdefault) {
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start = end = isa_route_intr_res(bus, start, end);
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if (start == 255)
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return (NULL);
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}
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break;
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default:
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panic("isa_alloc_resource: unsupported resource type %d", type);
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}
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if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
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start = ulmin(start + base, limit);
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end = ulmin(end + base, limit);
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}
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/*
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* This inlines a modified resource_list_alloc(); this is needed
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* because the resources need to have offsets added to them, which
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* cannot be done beforehand without patching the resource list entries
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* (which is ugly).
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*/
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if (passthrough) {
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return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
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type, rid, start, end, count, flags));
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}
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rle = resource_list_find(rl, type, *rid);
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if (rle == NULL)
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return (NULL); /* no resource of that type/rid */
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if (rle->res != NULL)
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panic("isa_alloc_resource: resource entry is busy");
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if (isdefault) {
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start = rle->start;
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count = ulmax(count, rle->count);
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end = ulmax(rle->end, start + count - 1);
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switch (type) {
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case SYS_RES_MEMORY:
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case SYS_RES_IOPORT:
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start += base;
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end += base;
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if (!INRANGE(start, base, limit) ||
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!INRANGE(end, base, limit)) {
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panic("isa_alloc_resource: resource list entry "
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"out of bus range (0x%lx - 0x%lx not in "
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"0x%lx - 0x%lx)", start, end, base, limit);
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}
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break;
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case SYS_RES_IRQ:
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start = end = isa_route_intr_res(bus, start, end);
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if (start == 255)
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return (NULL);
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break;
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}
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}
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rle->res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child,
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type, rid, start, end, count, flags);
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/*
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* Record the new range.
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*/
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if (rle->res != NULL) {
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rle->start = rman_get_start(rle->res) - base;
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rle->end = rman_get_end(rle->res) - base;
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rle->count = count;
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}
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return (rle->res);
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}
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int
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isa_release_resource(device_t bus, device_t child, int type, int rid,
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struct resource *res)
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{
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struct isa_device* idev = DEVTOISA(child);
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struct resource_list *rl = &idev->id_resources;
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return (resource_list_release(rl, bus, child, type, rid, res));
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}
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int
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isa_setup_intr(device_t dev, device_t child,
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struct resource *irq, int flags,
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driver_intr_t *intr, void *arg, void **cookiep)
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{
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/*
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* Just pass through. This is going to be handled by either one of
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* the parent PCI buses or the nexus device.
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* The interrupt was routed at allocation time.
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*/
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return (BUS_SETUP_INTR(device_get_parent(dev), child, irq, flags, intr,
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arg, cookiep));
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}
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int
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isa_teardown_intr(device_t dev, device_t child,
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struct resource *irq, void *cookie)
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{
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return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, irq, cookie));
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}
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