FreeBSD-5.3/sys/alpha/pci/lca.c
/*-
* Copyright (c) 1998 Doug Rabson
* 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/cdefs.h>
__FBSDID("$FreeBSD: src/sys/alpha/pci/lca.c,v 1.20 2003/08/17 06:42:08 marcel Exp $");
#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 <alpha/pci/lcareg.h>
#include <alpha/pci/lcavar.h>
#include <alpha/isa/isavar.h>
#include <machine/cpuconf.h>
#include <machine/intr.h>
#include <machine/md_var.h>
#include <machine/sgmap.h>
#include <machine/swiz.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
#define KV(pa) ALPHA_PHYS_TO_K0SEG(pa)
static devclass_t lca_devclass;
static device_t lca0; /* XXX only one for now */
struct lca_softc {
int junk;
};
#define LCA_SOFTC(dev) (struct lca_softc*) device_get_softc(dev)
static alpha_chipset_read_hae_t lca_read_hae;
static alpha_chipset_write_hae_t lca_write_hae;
static alpha_chipset_t lca_chipset = {
lca_read_hae,
lca_write_hae,
};
/*
* The LCA HAE is write-only. According to NetBSD, this is where it starts.
*/
static u_int32_t lca_hae_mem = 0x80000000;
/*
* The first 16Mb ignores the HAE. The next 112Mb uses the HAE to set
* the high bits of the PCI address.
*/
#define REG1 (1UL << 24)
static u_int32_t
lca_set_hae_mem(void *arg, u_int32_t pa)
{
int s;
u_int32_t msb;
if(pa >= REG1){
msb = pa & 0xf8000000;
pa -= msb;
s = splhigh();
if (msb != lca_hae_mem) {
lca_hae_mem = msb;
REGVAL(LCA_IOC_HAE) = lca_hae_mem;
alpha_mb();
alpha_mb();
}
splx(s);
}
return pa;
}
static u_int64_t
lca_read_hae(void)
{
return lca_hae_mem & 0xf8000000;
}
static void
lca_write_hae(u_int64_t hae)
{
u_int32_t pa = hae;
lca_set_hae_mem(0, pa);
}
static int lca_probe(device_t dev);
static int lca_attach(device_t dev);
static device_method_t lca_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, lca_probe),
DEVMETHOD(device_attach, lca_attach),
/* Bus interface */
DEVMETHOD(bus_setup_intr, isa_setup_intr),
DEVMETHOD(bus_teardown_intr, isa_teardown_intr),
{ 0, 0 }
};
static driver_t lca_driver = {
"lca",
lca_methods,
sizeof(struct lca_softc),
};
#define LCA_SGMAP_BASE (8*1024*1024)
#define LCA_SGMAP_SIZE (8*1024*1024)
static void
lca_sgmap_invalidate(void)
{
alpha_mb();
REGVAL(LCA_IOC_TBIA) = 0;
alpha_mb();
}
static void
lca_sgmap_map(void *arg, bus_addr_t ba, vm_offset_t pa)
{
u_int64_t *sgtable = arg;
int index = alpha_btop(ba - LCA_SGMAP_BASE);
if (pa) {
if (pa > (1L<<32))
panic("lca_sgmap_map: can't map address 0x%lx", pa);
sgtable[index] = ((pa >> 13) << 1) | 1;
} else {
sgtable[index] = 0;
}
alpha_mb();
lca_sgmap_invalidate();
}
static void
lca_init_sgmap(void)
{
void *sgtable;
/*
* First setup Window 0 to map 8Mb to 16Mb with an
* sgmap. Allocate the map aligned to a 32 boundary.
*/
REGVAL64(LCA_IOC_W_BASE0) = LCA_SGMAP_BASE |
IOC_W_BASE_SG | IOC_W_BASE_WEN;
alpha_mb();
REGVAL64(LCA_IOC_W_MASK0) = IOC_W_MASK_8M;
alpha_mb();
sgtable = contigmalloc(8192, M_DEVBUF, M_NOWAIT,
0, (1L<<34),
32*1024, (1L<<34));
if (!sgtable)
panic("lca_init_sgmap: can't allocate page table");
chipset.sgmap = sgmap_map_create(LCA_SGMAP_BASE,
LCA_SGMAP_BASE + LCA_SGMAP_SIZE,
lca_sgmap_map, sgtable);
REGVAL64(LCA_IOC_W_T_BASE0) = pmap_kextract((vm_offset_t) sgtable);
alpha_mb();
REGVAL64(LCA_IOC_TB_ENA) = IOC_TB_ENA_TEN;
alpha_mb();
lca_sgmap_invalidate();
}
void
lca_init()
{
static int initted = 0;
static struct swiz_space io_space, mem_space;
if (initted) return;
initted = 1;
swiz_init_space(&io_space, KV(LCA_PCI_SIO));
swiz_init_space_hae(&mem_space, KV(LCA_PCI_SPARSE),
lca_set_hae_mem, 0);
busspace_isa_io = (struct alpha_busspace *) &io_space;
busspace_isa_mem = (struct alpha_busspace *) &mem_space;
/* Type 0 PCI conf access. */
REGVAL64(LCA_IOC_CONF) = 0;
if (platform.pci_intr_init)
platform.pci_intr_init();
chipset = lca_chipset;
}
static void
lca_machine_check(unsigned long mces, struct trapframe *framep,
unsigned long vector, unsigned long param);
static int
lca_probe(device_t dev)
{
if (lca0)
return ENXIO;
lca0 = dev;
device_set_desc(dev, "21066 Core Logic chipset"); /* XXX */
isa_init_intr();
lca_init_sgmap();
platform.mcheck_handler = lca_machine_check;
device_add_child(dev, "pcib", 0);
return 0;
}
static int
lca_attach(device_t dev)
{
lca_init();
set_iointr(alpha_dispatch_intr);
snprintf(chipset_type, sizeof(chipset_type), "lca");
chipset_bwx = 0;
chipset_ports = LCA_PCI_SIO;
chipset_memory = LCA_PCI_SPARSE;
chipset_dense = LCA_PCI_DENSE;
chipset_hae_mask = IOC_HAE_ADDREXT;
bus_generic_attach(dev);
return 0;
}
static void
lca_machine_check(unsigned long mces, struct trapframe *framep,
unsigned long vector, unsigned long param)
{
long stat0;
machine_check(mces, framep, vector, param);
/* clear error flags in IOC_STATUS0 register */
stat0 = REGVAL64(LCA_IOC_STAT0);
REGVAL64(LCA_IOC_STAT0) = stat0;
}
DRIVER_MODULE(lca, root, lca_driver, lca_devclass, 0, 0);