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-rw-r--r--lib/libio/bwx.c242
1 files changed, 242 insertions, 0 deletions
diff --git a/lib/libio/bwx.c b/lib/libio/bwx.c
new file mode 100644
index 0000000..bc3bbb3
--- /dev/null
+++ b/lib/libio/bwx.c
@@ -0,0 +1,242 @@
+/*-
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/fcntl.h>
+#include <sys/sysctl.h>
+#include <err.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("/dev/mem", O_RDWR);
+ if (mem_fd < 0)
+ err(1, "/dev/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((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((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((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,
+};
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