FreeBSD-5.3/lib/libio/bwx.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/lib/libio/bwx.c,v 1.6 2001/09/30 21:41:46 dillon Exp $");
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/fcntl.h>
#include <sys/sysctl.h>
#include <err.h>
#include <paths.h>
#include <machine/bwx.h>
#include <machine/sysarch.h>
#include <stdlib.h>
#include "io.h"
#define mb() __asm__ __volatile__("mb" : : : "memory")
#define wmb() __asm__ __volatile__("wmb" : : : "memory")
static int mem_fd; /* file descriptor to /dev/mem */
static void *bwx_int1_ports; /* mapped int1 io ports */
static void *bwx_int2_ports; /* mapped int2 io ports */
static void *bwx_int4_ports; /* mapped int4 io ports */
static u_int64_t bwx_io_base; /* physical address of ports */
static u_int64_t bwx_mem_base; /* physical address of bwx mem */
static void
bwx_init()
{
size_t len = sizeof(u_int64_t);
int error;
mem_fd = open(_PATH_MEM, O_RDWR);
if (mem_fd < 0)
err(1, _PATH_MEM);
bwx_int1_ports = mmap(0, 1L<<32, PROT_READ, MAP_ANON, -1, 0);
bwx_int2_ports = mmap(0, 1L<<32, PROT_READ, MAP_ANON, -1, 0);
bwx_int4_ports = mmap(0, 1L<<32, PROT_READ, MAP_ANON, -1, 0);
if ((error = sysctlbyname("hw.chipset.ports", &bwx_io_base, &len,
0, 0)) < 0)
err(1, "hw.chipset.ports");
if ((error = sysctlbyname("hw.chipset.memory", &bwx_mem_base, &len,
0, 0)) < 0)
err(1, "hw.chipset.memory");
}
static int
bwx_ioperm(u_int32_t from, u_int32_t num, int on)
{
u_int32_t start, end;
if (!bwx_int1_ports)
bwx_init();
if (!on)
return -1; /* XXX can't unmap yet */
start = trunc_page(from);
end = round_page(from + num);
munmap(bwx_int1_ports + start, end-start);
munmap(bwx_int2_ports + start, end-start);
munmap(bwx_int4_ports + start, end-start);
mmap(bwx_int1_ports + start, end-start, PROT_READ|PROT_WRITE, MAP_SHARED,
mem_fd, bwx_io_base + BWX_EV56_INT1 + start);
mmap(bwx_int2_ports + start, end-start, PROT_READ|PROT_WRITE, MAP_SHARED,
mem_fd, bwx_io_base + BWX_EV56_INT2 + start);
mmap(bwx_int4_ports + start, end-start, PROT_READ|PROT_WRITE, MAP_SHARED,
mem_fd, bwx_io_base + BWX_EV56_INT4 + start);
return 0;
}
static u_int8_t
bwx_inb(u_int32_t port)
{
mb();
return ldbu((vm_offset_t)bwx_int1_ports + port);
}
static u_int16_t
bwx_inw(u_int32_t port)
{
mb();
return ldwu((vm_offset_t)bwx_int2_ports + port);
}
static u_int32_t
bwx_inl(u_int32_t port)
{
mb();
return ldl((vm_offset_t)bwx_int4_ports + port);
}
static void
bwx_outb(u_int32_t port, u_int8_t val)
{
stb((vm_offset_t)bwx_int1_ports + port, val);
wmb();
}
static void
bwx_outw(u_int32_t port, u_int16_t val)
{
stw((vm_offset_t)bwx_int2_ports + port, val);
wmb();
}
static void
bwx_outl(u_int32_t port, u_int32_t val)
{
stl((vm_offset_t)bwx_int4_ports + port, val);
wmb();
}
struct bwx_mem_handle {
void *virt1; /* int1 address in user address-space */
void *virt2; /* int2 address in user address-space */
void *virt4; /* int4 address in user address-space */
};
static void *
bwx_map_memory(u_int32_t address, u_int32_t size)
{
struct bwx_mem_handle *h;
h = malloc(sizeof(struct bwx_mem_handle));
if (!h) return 0;
h->virt1 = mmap(0, size << 5, PROT_READ|PROT_WRITE, MAP_SHARED,
mem_fd, bwx_mem_base + BWX_EV56_INT1 + address);
if ((long) h->virt1 == -1) {
free(h);
return 0;
}
h->virt2 = mmap(0, size << 5, PROT_READ|PROT_WRITE, MAP_SHARED,
mem_fd, bwx_mem_base + BWX_EV56_INT2 + address);
if ((long) h->virt2 == -1) {
munmap(h->virt1, size);
free(h);
return 0;
}
h->virt4 = mmap(0, size << 5, PROT_READ|PROT_WRITE, MAP_SHARED,
mem_fd, bwx_mem_base + BWX_EV56_INT4 + address);
if ((long) h->virt4 == -1) {
munmap(h->virt1, size);
munmap(h->virt2, size);
free(h);
return 0;
}
return h;
}
static void
bwx_unmap_memory(void *handle, u_int32_t size)
{
struct bwx_mem_handle *h = handle;
munmap(h->virt1, size);
munmap(h->virt2, size);
munmap(h->virt4, size);
free(h);
}
static u_int8_t
bwx_readb(void *handle, u_int32_t offset)
{
struct bwx_mem_handle *h = handle;
return ldbu((vm_offset_t)h->virt1 + offset);
}
static u_int16_t
bwx_readw(void *handle, u_int32_t offset)
{
struct bwx_mem_handle *h = handle;
return ldwu((vm_offset_t)h->virt2 + offset);
}
static u_int32_t
bwx_readl(void *handle, u_int32_t offset)
{
struct bwx_mem_handle *h = handle;
return ldl((vm_offset_t)h->virt4 + offset);
}
static void
bwx_writeb(void *handle, u_int32_t offset, u_int8_t val)
{
struct bwx_mem_handle *h = handle;
stb_nb((vm_offset_t)h->virt1 + offset, val);
}
static void
bwx_writew(void *handle, u_int32_t offset, u_int16_t val)
{
struct bwx_mem_handle *h = handle;
stw_nb((vm_offset_t)h->virt2 + offset, val);
}
static void
bwx_writel(void *handle, u_int32_t offset, u_int32_t val)
{
struct bwx_mem_handle *h = handle;
stl_nb((vm_offset_t)h->virt4 + offset, val);
}
struct io_ops bwx_io_ops = {
bwx_ioperm,
bwx_inb,
bwx_inw,
bwx_inl,
bwx_outb,
bwx_outw,
bwx_outl,
bwx_map_memory,
bwx_unmap_memory,
bwx_readb,
bwx_readw,
bwx_readl,
bwx_writeb,
bwx_writew,
bwx_writel,
};