Start on a basic ACPI framework -- does not do much more than read out the

ACPI tables into kernel memory and attach ACPI and HPET timers currently.

In order to test this code, enabling the devices in GENERIC as well as
the ACPI_ENABLE option is needed.  This code does not do any thermal
control yet, so this should be done with care depending on the platform.

In the tree so more people can contribute to making this more fully
featured.

Ok niklas@ grange@ tedu@

1 files changed, 169 insertions, 0 deletions

diff --git a/usr.sbin/acpidump/acpi_user.c b/usr.sbin/acpidump/acpi_user.c
new file mode 100644
index 00000000000..bd924fa4393
--- /dev/null
+++ b/usr.sbin/acpidump/acpi_user.c
@@ -0,0 +1,169 @@
+/*	$OpenBSD: acpi_user.c,v 1.1 2005/06/02 20:09:39 tholo Exp $	*/
+/*-
+ * Copyright (c) 1999 Doug Rabson
+ * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
+ * 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.
+ *
+ *	$Id: acpi_user.c,v 1.1 2005/06/02 20:09:39 tholo Exp $
+ *	$FreeBSD: src/usr.sbin/acpi/acpidump/acpi_user.c,v 1.3 2000/11/08 02:37:00 iwasaki Exp $
+ */
+#ifdef  __FreeBSD__
+#include <sys/param.h>
+#else
+#include <sys/types.h>
+#define PAGE_MASK (0x1000-1) /*For I386*/
+#define trunc_page(x)		((x) & ~PAGE_MASK)
+#define round_page(x)		(((x) + PAGE_MASK) & ~PAGE_MASK)
+#endif
+
+#include <sys/mman.h>
+#include <sys/queue.h>
+#include <sys/stat.h>
+
+#include <err.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "acpidump.h"
+
+static int      acpi_mem_fd = -1;
+
+struct acpi_user_mapping {
+	LIST_ENTRY(acpi_user_mapping) link;
+	vm_offset_t     pa;
+	caddr_t         va;
+	size_t          size;
+};
+
+LIST_HEAD(acpi_user_mapping_list, acpi_user_mapping) maplist;
+
+static void
+acpi_user_init()
+{
+
+	if (acpi_mem_fd == -1) {
+		acpi_mem_fd = open("/dev/mem", O_RDONLY);
+		if (acpi_mem_fd == -1)
+			err(1, "opening /dev/mem");
+		LIST_INIT(&maplist);
+	}
+}
+
+static struct acpi_user_mapping *
+acpi_user_find_mapping(vm_offset_t pa, size_t size)
+{
+	struct	acpi_user_mapping *map;
+
+	/* First search for an existing mapping */
+	for (map = LIST_FIRST(&maplist); map; map = LIST_NEXT(map, link)) {
+		if (map->pa <= pa && map->size >= pa + size - map->pa)
+			return (map);
+	}
+
+	/* Then create a new one */
+	size = round_page(pa + size) - trunc_page(pa);
+	pa = trunc_page(pa);
+	map = malloc(sizeof(struct acpi_user_mapping));
+	if (!map)
+		errx(1, "out of memory");
+	map->pa = pa;
+	map->va = mmap(0, size, PROT_READ, MAP_SHARED, acpi_mem_fd, pa);
+	map->size = size;
+	if ((long) map->va == -1)
+		err(1, "can't map address");
+	LIST_INSERT_HEAD(&maplist, map, link);
+
+	return (map);
+}
+
+/*
+ * Public interfaces
+ */
+
+struct ACPIrsdp *
+acpi_find_rsd_ptr()
+{
+	int		i;
+	u_int8_t	buf[sizeof(struct ACPIrsdp)];
+
+	acpi_user_init();
+	for (i = 0; i < 1024 * 1024; i += 16) {
+		read(acpi_mem_fd, buf, 16);
+		if (!memcmp(buf, "RSD PTR ", 8)) {
+			/* Read the rest of the structure */
+			read(acpi_mem_fd, buf + 16, sizeof(struct ACPIrsdp) - 16);
+
+			/* Verify checksum before accepting it. */
+			if (acpi_checksum(buf, sizeof(struct ACPIrsdp)))
+				continue;
+			return (acpi_map_physical(i, sizeof(struct ACPIrsdp)));
+		}
+	}
+
+	return (0);
+}
+
+void *
+acpi_map_physical(vm_offset_t pa, size_t size)
+{
+	struct	acpi_user_mapping *map;
+
+	map = acpi_user_find_mapping(pa, size);
+	return (map->va + (pa - map->pa));
+}
+
+void
+acpi_load_dsdt(char *dumpfile, u_int8_t **dpp, u_int8_t **endp)
+{
+	u_int8_t	*dp;
+	u_int8_t	*end;
+	struct	stat sb;
+
+	if ((acpi_mem_fd = open(dumpfile, O_RDONLY)) == -1) {
+		errx(1, "opening %s\n", dumpfile);
+	}
+
+	LIST_INIT(&maplist);
+
+	if (fstat(acpi_mem_fd, &sb) == -1) {
+		errx(1, "fstat %s\n", dumpfile);
+	}
+
+	dp = mmap(0, sb.st_size, PROT_READ, MAP_PRIVATE, acpi_mem_fd, 0);
+	if (dp == NULL) {
+		errx(1, "mmap %s\n", dumpfile);
+	}
+
+	if (strncmp(dp, "DSDT", 4) == 0) {
+		memcpy(&dsdt_header, dp, SIZEOF_SDT_HDR);
+		dp += SIZEOF_SDT_HDR;
+		sb.st_size -= SIZEOF_SDT_HDR;
+	}
+
+	end = (u_int8_t *) dp + sb.st_size;
+	*dpp = dp;
+	*endp = end;
+}