248 lines
6.3 KiB
C
248 lines
6.3 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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* $FreeBSD$
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*/
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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/swiz.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 *swiz_ports; /* mapped io ports */
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static u_int64_t swiz_io_base; /* physical address of ports */
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static u_int64_t swiz_mem_base; /* physical address of sparse mem */
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static u_int64_t swiz_dense_base; /* physical address of dense mem */
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static u_int64_t swiz_hae_mask; /* mask address bits for hae */
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static u_int32_t swiz_hae; /* cache of current hae */
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static void
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swiz_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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swiz_ports = mmap(0, 1L<<32, PROT_READ, MAP_ANON, -1, 0);
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if ((error = sysctlbyname("hw.chipset.ports", &swiz_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", &swiz_mem_base, &len,
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0, 0)) < 0)
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err(1, "hw.chipset.memory");
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if ((error = sysctlbyname("hw.chipset.dense", &swiz_dense_base, &len,
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0, 0)) < 0)
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err(1, "hw.chipset.memory");
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if ((error = sysctlbyname("hw.chipset.hae_mask", &swiz_hae_mask, &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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swiz_ioperm(u_int32_t from, u_int32_t num, int on)
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{
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u_int64_t start, end;
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void *addr;
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if (!swiz_ports)
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swiz_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 << 5);
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end = round_page((from + num) << 5);
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addr = swiz_ports + start;
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munmap(addr, end - start);
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mmap(addr, end - start, PROT_READ|PROT_WRITE, MAP_SHARED,
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mem_fd, swiz_io_base + start);
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return 0;
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}
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static u_int8_t
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swiz_inb(u_int32_t port)
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{
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mb();
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return SPARSE_READ_BYTE(swiz_ports, port);
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}
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static u_int16_t
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swiz_inw(u_int32_t port)
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{
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mb();
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return SPARSE_READ_WORD(swiz_ports, port);
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}
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static u_int32_t
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swiz_inl(u_int32_t port)
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{
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mb();
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return SPARSE_READ_LONG(swiz_ports, port);
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}
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static void
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swiz_outb(u_int32_t port, u_int8_t val)
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{
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SPARSE_WRITE_BYTE(swiz_ports, port, val);
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wmb();
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}
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static void
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swiz_outw(u_int32_t port, u_int16_t val)
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{
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SPARSE_WRITE_WORD(swiz_ports, port, val);
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wmb();
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}
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static void
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swiz_outl(u_int32_t port, u_int32_t val)
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{
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SPARSE_WRITE_LONG(swiz_ports, port, val);
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wmb();
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}
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struct swiz_mem_handle {
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u_int32_t phys; /* address in PCI address-space */
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void *virt; /* address in user address-space */
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u_int32_t size; /* size of mapped region */
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};
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static void *
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swiz_map_memory(u_int32_t address, u_int32_t size)
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{
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struct swiz_mem_handle *h;
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h = malloc(sizeof(struct swiz_mem_handle));
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if (!h) return 0;
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h->phys = address;
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h->virt = mmap(0, size << 5, PROT_READ|PROT_WRITE, MAP_SHARED,
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mem_fd,
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swiz_mem_base + ((address & ~swiz_hae_mask) << 5));
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if ((long) h->virt == -1) {
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free(h);
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return 0;
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}
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h->size = size << 5;
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return h;
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}
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static void
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swiz_unmap_memory(void *handle, u_int32_t size)
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{
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struct swiz_mem_handle *h = handle;
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munmap(h->virt, h->size);
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free(h);
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}
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static void
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swiz_sethae(vm_offset_t phys)
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{
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u_int32_t hae = phys & swiz_hae_mask;
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if (hae != swiz_hae) {
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alpha_sethae(hae);
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swiz_hae = hae;
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}
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}
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static u_int8_t
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swiz_readb(void *handle, u_int32_t offset)
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{
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struct swiz_mem_handle *h = handle;
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swiz_sethae(h->phys + offset);
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return SPARSE_READ_BYTE(h->virt, offset);
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}
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static u_int16_t
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swiz_readw(void *handle, u_int32_t offset)
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{
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struct swiz_mem_handle *h = handle;
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swiz_sethae(h->phys + offset);
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return SPARSE_READ_WORD(h->virt, offset);
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}
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static u_int32_t
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swiz_readl(void *handle, u_int32_t offset)
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{
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struct swiz_mem_handle *h = handle;
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swiz_sethae(h->phys + offset);
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return SPARSE_READ_LONG(h->virt, offset);
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}
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static void
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swiz_writeb(void *handle, u_int32_t offset, u_int8_t val)
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{
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struct swiz_mem_handle *h = handle;
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swiz_sethae(h->phys + offset);
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SPARSE_WRITE_BYTE(h->virt, offset, val);
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}
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static void
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swiz_writew(void *handle, u_int32_t offset, u_int16_t val)
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{
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struct swiz_mem_handle *h = handle;
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swiz_sethae(h->phys + offset);
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SPARSE_WRITE_WORD(h->virt, offset, val);
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}
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static void
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swiz_writel(void *handle, u_int32_t offset, u_int32_t val)
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{
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struct swiz_mem_handle *h = handle;
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swiz_sethae(h->phys + offset);
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SPARSE_WRITE_LONG(h->virt, offset, val);
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}
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struct io_ops swiz_io_ops = {
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swiz_ioperm,
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swiz_inb,
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swiz_inw,
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swiz_inl,
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swiz_outb,
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swiz_outw,
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swiz_outl,
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swiz_map_memory,
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swiz_unmap_memory,
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swiz_readb,
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swiz_readw,
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swiz_readl,
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swiz_writeb,
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swiz_writew,
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swiz_writel,
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};
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