path: root/arch/ia64/kernel/acpi.c

/*
 *  acpi.c - Architecture-Specific Low-Level ACPI Support
 *
 *  Copyright (C) 1999 VA Linux Systems
 *  Copyright (C) 1999,2000 Walt Drummond <drummond@valinux.com>
 *  Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
 *	David Mosberger-Tang <davidm@hpl.hp.com>
 *  Copyright (C) 2000 Intel Corp.
 *  Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
 *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *  Copyright (C) 2001 Jenna Hall <jenna.s.hall@intel.com>
 *  Copyright (C) 2001 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
 *  Copyright (C) 2002 Erich Focht <efocht@ess.nec.de>
 *  Copyright (C) 2004 Ashok Raj <ashok.raj@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/irq.h>
#include <linux/acpi.h>
#include <linux/efi.h>
#include <linux/mmzone.h>
#include <linux/nodemask.h>
#include <asm/io.h>
#include <asm/iosapic.h>
#include <asm/machvec.h>
#include <asm/page.h>
#include <asm/system.h>
#include <asm/numa.h>
#include <asm/sal.h>
#include <asm/cyclone.h>
#include <asm/xen/hypervisor.h>

#define BAD_MADT_ENTRY(entry, end) (                                        \
		(!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
		((struct acpi_subtable_header *)entry)->length < sizeof(*entry))

#define PREFIX			"ACPI: "

void (*pm_idle) (void);
EXPORT_SYMBOL(pm_idle);
void (*pm_power_off) (void);
EXPORT_SYMBOL(pm_power_off);

unsigned int acpi_cpei_override;
unsigned int acpi_cpei_phys_cpuid;

unsigned long acpi_wakeup_address = 0;

#ifdef CONFIG_IA64_GENERIC
static unsigned long __init acpi_find_rsdp(void)
{
	unsigned long rsdp_phys = 0;

	if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
		rsdp_phys = efi.acpi20;
	else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
		printk(KERN_WARNING PREFIX
		       "v1.0/r0.71 tables no longer supported\n");
	return rsdp_phys;
}
#endif

const char __init *
acpi_get_sysname(void)
{
#ifdef CONFIG_IA64_GENERIC
	unsigned long rsdp_phys;
	struct acpi_table_rsdp *rsdp;
	struct acpi_table_xsdt *xsdt;
	struct acpi_table_header *hdr;
#ifdef CONFIG_DMAR
	u64 i, nentries;
#endif

	rsdp_phys = acpi_find_rsdp();
	if (!rsdp_phys) {
		printk(KERN_ERR
		       "ACPI 2.0 RSDP not found, default to \"dig\"\n");
		return "dig";
	}

	rsdp = (struct acpi_table_rsdp *)__va(rsdp_phys);
	if (strncmp(rsdp->signature, ACPI_SIG_RSDP, sizeof(ACPI_SIG_RSDP) - 1)) {
		printk(KERN_ERR
		       "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
		return "dig";
	}

	xsdt = (struct acpi_table_xsdt *)__va(rsdp->xsdt_physical_address);
	hdr = &xsdt->header;
	if (strncmp(hdr->signature, ACPI_SIG_XSDT, sizeof(ACPI_SIG_XSDT) - 1)) {
		printk(KERN_ERR
		       "ACPI 2.0 XSDT signature incorrect, default to \"dig\"\n");
		return "dig";
	}

	if (!strcmp(hdr->oem_id, "HP")) {
		return "hpzx1";
	} else if (!strcmp(hdr->oem_id, "SGI")) {
		if (!strcmp(hdr->oem_table_id + 4, "UV"))
			return "uv";
		else
			return "sn2";
	} else if (xen_pv_domain() && !strcmp(hdr->oem_id, "XEN")) {
		return "xen";
	}

#ifdef CONFIG_DMAR
	/* Look for Intel IOMMU */
	nentries = (hdr->length - sizeof(*hdr)) /
			 sizeof(xsdt->table_offset_entry[0]);
	for (i = 0; i < nentries; i++) {
		hdr = __va(xsdt->table_offset_entry[i]);
		if (strncmp(hdr->signature, ACPI_SIG_DMAR,
			sizeof(ACPI_SIG_DMAR) - 1) == 0)
			return "dig_vtd";
	}
#endif

	return "dig";
#else
# if defined (CONFIG_IA64_HP_SIM)
	return "hpsim";
# elif defined (CONFIG_IA64_HP_ZX1)
	return "hpzx1";
# elif defined (CONFIG_IA64_HP_ZX1_SWIOTLB)
	return "hpzx1_swiotlb";
# elif defined (CONFIG_IA64_SGI_SN2)
	return