acpi.c

xen 3.2.2 源码

/*
 *  acpi.c - Architecture-Specific Low-Level ACPI Support
 *
 *  Copyright (C) 1999 VA Linux Systems
 *  Copyright (C) 1999,2000 Walt Drummond <[e-mail]>
 *  Copyright (C) 2000, 2002-2003 Hewlett-Packard Co.
 *	David Mosberger-Tang <[e-mail]>
 *  Copyright (C) 2000 Intel Corp.
 *  Copyright (C) 2000,2001 J.I. Lee <[e-mail]>
 *  Copyright (C) 2001 Paul Diefenbaugh <[e-mail]>
 *  Copyright (C) 2001 Jenna Hall <[e-mail]>
 *  Copyright (C) 2001 Takayoshi Kochi <[e-mail]>
 *  Copyright (C) 2002 Erich Focht <[e-mail]>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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/config.h>
#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 <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/hw_irq.h>
#ifdef XEN
#include <xen/errno.h>
#include <xen/nodemask.h>
#endif

#define BAD_MADT_ENTRY(entry, end) (                                        \
		(!entry) || (unsigned long)entry + sizeof(*entry) > end ||  \
		((acpi_table_entry_header *)entry)->length != sizeof(*entry))

#define PREFIX			"ACPI: "

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

unsigned char acpi_kbd_controller_present = 1;
unsigned char acpi_legacy_devices;

const char *
acpi_get_sysname (void)
{
/* #ifdef CONFIG_IA64_GENERIC */
	unsigned long rsdp_phys;
	struct acpi20_table_rsdp *rsdp;
	struct acpi_table_xsdt *xsdt;
	struct acpi_table_header *hdr;

	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 acpi20_table_rsdp *) __va(rsdp_phys);
	if (strncmp(rsdp->signature, RSDP_SIG, sizeof(RSDP_SIG) - 1)) {
		printk(KERN_ERR "ACPI 2.0 RSDP signature incorrect, default to \"dig\"\n");
		return "dig";
	}

	xsdt = (struct acpi_table_xsdt *) __va(rsdp->xsdt_address);
	hdr = &xsdt->header;
	if (strncmp(hdr->signature, XSDT_SIG, sizeof(XSDT_SIG) - 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")) {
		return "sn2";
	}

	return "dig";
/*
#else
# if defined (CONFIG_IA64_HP_SIM)
	return "hpsim";
# elif defined (CONFIG_IA64_HP_ZX1)
	return "hpzx1";
# elif defined (CONFIG_IA64_SGI_SN2)
	return "sn2";
# elif defined (CONFIG_IA64_DIG)
	return "dig";
# else
#	error Unknown platform.  Fix acpi.c.
# endif
#endif
*/
}

#ifdef CONFIG_ACPI_BOOT

#define ACPI_MAX_PLATFORM_INTERRUPTS	256

/* Array to record platform interrupt vectors for generic interrupt routing. */
int platform_intr_list[ACPI_MAX_PLATFORM_INTERRUPTS] = {
	[0 ... ACPI_MAX_PLATFORM_INTERRUPTS - 1] = -1
};

enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_IOSAPIC;

/*
 * Interrupt routing API for device drivers.  Provides interrupt vector for
 * a generic platform event.  Currently only CPEI is implemented.
 */
int
acpi_request_vector (u32 int_type)
{
	int vector = -1;

	if (int_type < ACPI_MAX_PLATFORM_INTERRUPTS) {
		/* corrected platform error interrupt */
		vector = platform_intr_list[int_type];
	} else
		printk(KERN_ERR "acpi_request_vector(): invalid interrupt type\n");
	return vector;
}

char *
__acpi_map_table (unsigned long phys_addr, unsigned long size)
{
	return __va(phys_addr);
}

/* --------------------------------------------------------------------------
                            Boot-time Table Parsing
   -------------------------------------------------------------------------- */

static int			total_cpus __initdata;
static int			available_cpus __initdata;
struct acpi_table_madt *	acpi_madt __initdata;
static u8			has_8259;

static int __init
acpi_parse_lapic_addr_ovr (
	acpi_table_entry_header *header, const unsigned long end)
{
	struct acpi_table_lapic_addr_ovr *lapic;

	lapic = (struct acpi_table_lapic_addr_ovr *) header;

	if (BAD_MADT_ENTRY(lapic, end))
		return -EINVAL;

	acpi_table_print_madt_entry(header);

	if (lapic->address) {
		iounmap((void *) ipi_base_addr);
		ipi_base_addr = (void __iomem *) ioremap(lapic->address, 0);
	}
	return 0;
}


static int __init
acpi_parse_lsapic (acpi_table_entry_header *header, const unsigned long end)
{
	struct acpi_table_lsapic *lsapic;

	lsapic = (struct acpi_table_lsapic *) header;

	if (BAD_MADT_ENTRY(lsapic, end))
		return -EINVAL;

	acpi_table_print_madt_entry(header);

	printk(KERN_INFO "CPU %d (0x%04x)", total_cpus, (lsapic->id << 8) | lsapic->eid);

	if (!lsapic->flags.enabled)
		printk(" disabled");
	else {
		printk(" enabled");
#ifdef CONFIG_SMP
		if (available_cpus < NR_CPUS) {
			smp_boot_data.cpu_phys_id[available_cpus] = (lsapic->id << 8) | lsapic->eid;
			if (hard_smp_processor_id()
			    == (unsigned int) smp_boot_data.cpu_phys_id[available_cpus])
				printk(" (BSP)");
			++available_cpus;
		} else {
			printk(" - however, ignored...");
		}
#else
		++available_cpus;
#endif
	}

	printk("\n");

	total_cpus++;
	return 0;
}


static int __init
acpi_parse_lapic_nmi (acpi_table_entry_header *header, const unsigned long end)
{
	struct acpi_table_lapic_nmi *lacpi_nmi;

	lacpi_nmi = (struct acpi_table_lapic_nmi*) header;

	if (BAD_MADT_ENTRY(lacpi_nmi, end))
		return -EINVAL;

	acpi_table_print_madt_entry(header);

	/* TBD: Support lapic_nmi entries */
	return 0;
}


static int __init
acpi_parse_iosapic (acpi_table_entry_header *header, const unsigned long end)
{
	struct acpi_table_iosapic *iosapic;

	iosapic = (struct acpi_table_iosapic *) header;

	if (BAD_MADT_ENTRY(iosapic, end))
		return -EINVAL;

	acpi_table_print_madt_entry(header);

	iosapic_init(iosapic->address, iosapic->global_irq_base);

	return 0;
}

static int __init
acpi_parse_plat_int_src (
	acpi_table_entry_header *header, const unsigned long end)
{
	struct acpi_table_plat_int_src *plintsrc;
	int vector;

	plintsrc = (struct acpi_table_plat_int_src *) header;

	if (BAD_MADT_ENTRY(plintsrc, end))
		return -EINVAL;

	acpi_table_print_madt_entry(header);

	/*
	 * Get vector assignment for this interrupt, set attributes,
	 * and program the IOSAPIC routing table.
	 */
	vector = iosapic_register_platform_intr(plintsrc->type,
						plintsrc->global_irq,
						plintsrc->iosapic_vector,
						plintsrc->eid,
						plintsrc->id,
						(plintsrc->flags.polarity == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
						(plintsrc->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);

	platform_intr_list[plintsrc->type] = vector;
	return 0;
}


static int __init
acpi_parse_int_src_ovr (
	acpi_table_entry_header *header, const unsigned long end)
{
	struct acpi_table_int_src_ovr *p;

	p = (struct acpi_table_int_src_ovr *) header;

	if (BAD_MADT_ENTRY(p, end))
		return -EINVAL;

	acpi_table_print_madt_entry(header);

	iosapic_override_isa_irq(p->bus_irq, p->global_irq,
				 (p->flags.polarity == 1) ? IOSAPIC_POL_HIGH : IOSAPIC_POL_LOW,
				 (p->flags.trigger == 1) ? IOSAPIC_EDGE : IOSAPIC_LEVEL);
	return 0;
}

static int __init
acpi_parse_nmi_src (acpi_table_entry_header *header, const unsigned long end)
{
	struct acpi_table_nmi_src *nmi_src;

	nmi_src = (struct acpi_table_nmi_src*) header;

	if (BAD_MADT_ENTRY(nmi_src, end))
		return -EINVAL;

	acpi_table_print_madt_entry(header);

	/* TBD: Support nimsrc entries */
	return 0;
}
/* Hook from generic ACPI tables.c */
void __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
	if (!strncmp(oem_id, "IBM", 3) &&
	    (!strncmp(oem_table_id, "SERMOW", 6))){

		/* Unfortunatly ITC_DRIFT is not yet part of the
		 * official SAL spec, so the ITC_DRIFT bit is not
		 * set by the BIOS on this hardware.
		 */
		sal_platform_features |= IA64_SAL_PLATFORM_FEATURE_ITC_DRIFT;

#if 0
		/*Start cyclone clock*/
		cyclone_setup(0);
#endif
	}
}

static int __init
acpi_parse_madt (unsigned long phys_addr, unsigned long size)
{
	if (!phys_addr || !size)
		return -EINVAL;

	acpi_madt = (struct acpi_table_madt *) __va(phys_addr);