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245 lines
6.4 KiB
C
245 lines
6.4 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/fcntl.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <paths.h>
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#include <machine/bwx.h>
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#include <machine/sysarch.h>
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#include <stdlib.h>
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#include "io.h"
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#define mb() __asm__ __volatile__("mb" : : : "memory")
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#define wmb() __asm__ __volatile__("wmb" : : : "memory")
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static int mem_fd; /* file descriptor to /dev/mem */
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static void *bwx_int1_ports; /* mapped int1 io ports */
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static void *bwx_int2_ports; /* mapped int2 io ports */
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static void *bwx_int4_ports; /* mapped int4 io ports */
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static u_int64_t bwx_io_base; /* physical address of ports */
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static u_int64_t bwx_mem_base; /* physical address of bwx mem */
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static void
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bwx_init()
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{
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size_t len = sizeof(u_int64_t);
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int error;
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mem_fd = open(_PATH_MEM, O_RDWR);
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if (mem_fd < 0)
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err(1, _PATH_MEM);
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bwx_int1_ports = mmap(0, 1L<<32, PROT_READ, MAP_ANON, -1, 0);
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bwx_int2_ports = mmap(0, 1L<<32, PROT_READ, MAP_ANON, -1, 0);
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bwx_int4_ports = mmap(0, 1L<<32, PROT_READ, MAP_ANON, -1, 0);
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if ((error = sysctlbyname("hw.chipset.ports", &bwx_io_base, &len,
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0, 0)) < 0)
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err(1, "hw.chipset.ports");
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if ((error = sysctlbyname("hw.chipset.memory", &bwx_mem_base, &len,
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0, 0)) < 0)
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err(1, "hw.chipset.memory");
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}
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static int
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bwx_ioperm(u_int32_t from, u_int32_t num, int on)
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{
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u_int32_t start, end;
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if (!bwx_int1_ports)
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bwx_init();
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if (!on)
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return -1; /* XXX can't unmap yet */
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start = trunc_page(from);
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end = round_page(from + num);
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munmap(bwx_int1_ports + start, end-start);
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munmap(bwx_int2_ports + start, end-start);
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munmap(bwx_int4_ports + start, end-start);
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mmap(bwx_int1_ports + start, end-start, PROT_READ|PROT_WRITE, MAP_SHARED,
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mem_fd, bwx_io_base + BWX_EV56_INT1 + start);
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mmap(bwx_int2_ports + start, end-start, PROT_READ|PROT_WRITE, MAP_SHARED,
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mem_fd, bwx_io_base + BWX_EV56_INT2 + start);
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mmap(bwx_int4_ports + start, end-start, PROT_READ|PROT_WRITE, MAP_SHARED,
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mem_fd, bwx_io_base + BWX_EV56_INT4 + start);
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return 0;
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}
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static u_int8_t
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bwx_inb(u_int32_t port)
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{
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mb();
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return ldbu((vm_offset_t)bwx_int1_ports + port);
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}
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static u_int16_t
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bwx_inw(u_int32_t port)
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{
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mb();
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return ldwu((vm_offset_t)bwx_int2_ports + port);
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}
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static u_int32_t
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bwx_inl(u_int32_t port)
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{
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mb();
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return ldl((vm_offset_t)bwx_int4_ports + port);
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}
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static void
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bwx_outb(u_int32_t port, u_int8_t val)
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{
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stb((vm_offset_t)bwx_int1_ports + port, val);
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wmb();
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}
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static void
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bwx_outw(u_int32_t port, u_int16_t val)
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{
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stw((vm_offset_t)bwx_int2_ports + port, val);
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wmb();
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}
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static void
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bwx_outl(u_int32_t port, u_int32_t val)
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{
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stl((vm_offset_t)bwx_int4_ports + port, val);
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wmb();
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}
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struct bwx_mem_handle {
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void *virt1; /* int1 address in user address-space */
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void *virt2; /* int2 address in user address-space */
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void *virt4; /* int4 address in user address-space */
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};
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static void *
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bwx_map_memory(u_int32_t address, u_int32_t size)
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{
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struct bwx_mem_handle *h;
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h = malloc(sizeof(struct bwx_mem_handle));
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if (!h) return 0;
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h->virt1 = mmap(0, size << 5, PROT_READ|PROT_WRITE, MAP_SHARED,
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mem_fd, bwx_mem_base + BWX_EV56_INT1 + address);
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if ((long) h->virt1 == -1) {
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free(h);
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return 0;
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}
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h->virt2 = mmap(0, size << 5, PROT_READ|PROT_WRITE, MAP_SHARED,
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mem_fd, bwx_mem_base + BWX_EV56_INT2 + address);
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if ((long) h->virt2 == -1) {
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munmap(h->virt1, size);
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free(h);
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return 0;
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}
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h->virt4 = mmap(0, size << 5, PROT_READ|PROT_WRITE, MAP_SHARED,
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mem_fd, bwx_mem_base + BWX_EV56_INT4 + address);
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if ((long) h->virt4 == -1) {
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munmap(h->virt1, size);
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munmap(h->virt2, size);
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free(h);
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return 0;
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}
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return h;
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}
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static void
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bwx_unmap_memory(void *handle, u_int32_t size)
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{
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struct bwx_mem_handle *h = handle;
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munmap(h->virt1, size);
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munmap(h->virt2, size);
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munmap(h->virt4, size);
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free(h);
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}
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static u_int8_t
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bwx_readb(void *handle, u_int32_t offset)
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{
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struct bwx_mem_handle *h = handle;
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return ldbu((vm_offset_t)h->virt1 + offset);
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}
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static u_int16_t
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bwx_readw(void *handle, u_int32_t offset)
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{
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struct bwx_mem_handle *h = handle;
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return ldwu((vm_offset_t)h->virt2 + offset);
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}
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static u_int32_t
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bwx_readl(void *handle, u_int32_t offset)
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{
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struct bwx_mem_handle *h = handle;
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return ldl((vm_offset_t)h->virt4 + offset);
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}
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static void
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bwx_writeb(void *handle, u_int32_t offset, u_int8_t val)
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{
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struct bwx_mem_handle *h = handle;
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stb_nb((vm_offset_t)h->virt1 + offset, val);
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}
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static void
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bwx_writew(void *handle, u_int32_t offset, u_int16_t val)
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{
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struct bwx_mem_handle *h = handle;
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stw_nb((vm_offset_t)h->virt2 + offset, val);
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}
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static void
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bwx_writel(void *handle, u_int32_t offset, u_int32_t val)
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{
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struct bwx_mem_handle *h = handle;
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stl_nb((vm_offset_t)h->virt4 + offset, val);
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}
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struct io_ops bwx_io_ops = {
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bwx_ioperm,
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bwx_inb,
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bwx_inw,
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bwx_inl,
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bwx_outb,
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bwx_outw,
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bwx_outl,
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bwx_map_memory,
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bwx_unmap_memory,
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bwx_readb,
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bwx_readw,
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bwx_readl,
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bwx_writeb,
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bwx_writew,
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bwx_writel,
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};
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