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/*

 *  boot.c - Architecture-Specific Low-Level ACPI Boot Support

 *

 *  Copyright (C) 2001, 2002 Paul Diefenbaugh 

 *  Copyright (C) 2001 Jun Nakajima 

 *

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 *

 *  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 

#include 

#include 

#include 

#include 

static inline void outb(u8 v, u16 port)

{

        asm volatile("outb %0,%1" : : "a" (v), "dN" (port));

}

static inline u8 inb(u16 port)

{

        u8 v;

        asm volatile("inb %1,%0" : "=a" (v) : "dN" (port));

        return v;

}

static int __initdata acpi_force = 0;

int acpi_disabled;

EXPORT_SYMBOL(acpi_disabled);

#ifdef	CONFIG_X86_64

# include 

#endif				/* X86 */

#define PREFIX			"ACPI: "

int acpi_noirq;				/* skip ACPI IRQ initialization */

int acpi_pci_disabled;		/* skip ACPI PCI scan and IRQ initialization */

EXPORT_SYMBOL(acpi_pci_disabled);

int acpi_ioapic;

int acpi_strict;

u8 acpi_sci_flags __initdata;

/*

 * acpi_pic_sci_set_trigger()

 *

 * use ELCR to set PIC-mode trigger type for SCI

 *

 * If a PIC-mode SCI is not recognized or gives spurious IRQ7's

 * it may require Edge Trigger -- use "acpi_sci=edge"

 *

 * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers

 * for the 8259 PIC.  bit[n] = 1 means irq[n] is Level, otherwise Edge.

 * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)

 * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)

 */

void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)

{

	unsigned int mask = 1 << irq;

	unsigned int old, new;

	/* Real old ELCR mask */

//	old = inb(0x4d0) | (inb(0x4d1) << 8);

	/*

	 * If we use ACPI to set PCI IRQs, then we should clear ELCR

	 * since we will set it correctly as we enable the PCI irq

	 * routing.

	 */

	new = acpi_noirq ? old : 0;

	/*

	 * Update SCI information in the ELCR, it isn't in the PCI

	 * routing tables..

	 */

	switch (trigger) {

	case 1:		/* Edge - clear */

		new &= ~mask;

		break;

	case 3:		/* Level - set */

		new |= mask;

		break;

	}

	if (old == new)

		return;

	printk(PREFIX "setting ELCR to %04x (from %04x)\n", new, old);

//	outb(new, 0x4d0);

//	outb(new >> 8, 0x4d1);

}

static int __init acpi_parse_sbf(struct acpi_table_header *table)

{

	struct acpi_table_boot *sb = (struct acpi_table_boot *)table;

	sbf_port = sb->cmos_index;	/* Save CMOS port */

	return 0;

}

#ifdef CONFIG_HPET_TIMER

#include 

static struct resource *hpet_res __initdata;

static int __init acpi_parse_hpet(struct acpi_table_header *table)

{

	struct acpi_table_hpet *hpet_tbl = (struct acpi_table_hpet *)table;

	if (hpet_tbl->address.space_id != ACPI_SPACE_MEM) {

		printk(KERN_WARNING PREFIX "HPET timers must be located in "

		       "memory.\n");

		return -1;

	}

	hpet_address = hpet_tbl->address.address;

	hpet_blockid = hpet_tbl->sequence;

	/*

	 * Some broken BIOSes advertise HPET at 0x0. We really do not

	 * want to allocate a resource there.

	 */

	if (!hpet_address) {

		printk(KERN_WARNING PREFIX

		       "HPET id: %#x base: %#lx is invalid\n",

		       hpet_tbl->id, hpet_address);

		return 0;

	}

#ifdef CONFIG_X86_64

	/*

	 * Some even more broken BIOSes advertise HPET at

	 * 0xfed0000000000000 instead of 0xfed00000. Fix it up and add

	 * some noise:

	 */

	if (hpet_address == 0xfed0000000000000UL) {

		if (!hpet_force_user) {

			printk(KERN_WARNING PREFIX "HPET id: %#x "

			       "base: 0xfed0000000000000 is bogus\n "

			       "try hpet=force on the kernel command line to "

			       "fix it up to 0xfed00000.\n", hpet_tbl->id);

			hpet_address = 0;

			return 0;

		}

		printk(KERN_WARNING PREFIX

		       "HPET id: %#x base: 0xfed0000000000000 fixed up "

		       "to 0xfed00000.\n", hpet_tbl->id);

		hpet_address >>= 32;

	}

#endif

	printk(KERN_INFO PREFIX "HPET id: %#x base: %#lx\n",

	       hpet_tbl->id, hpet_address);

	/*

	 * Allocate and initialize the HPET firmware resource for adding into

	 * the resource tree during the lateinit timeframe.

	 */

#define HPET_RESOURCE_NAME_SIZE 9

	hpet_res = alloc_bootmem(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);

	hpet_res->name = (void *)&hpet_res[1];

	hpet_res->flags = IORESOURCE_MEM;

	snprintf((char *)hpet_res->name, HPET_RESOURCE_NAME_SIZE, "HPET %u",

		 hpet_tbl->sequence);

	hpet_res->start = hpet_address;

	hpet_res->end = hpet_address + (1 * 1024) - 1;

	return 0;

}

/*

 * hpet_insert_resource inserts the HPET resources used into the resource

 * tree.

 */

static __init int hpet_insert_resource(void)

{

	if (!hpet_res)

		return 1;

	return insert_resource(&iomem_resource, hpet_res);

}

late_initcall(hpet_insert_resource);

#else

#define	acpi_parse_hpet	NULL

#endif

static int __init acpi_parse_fadt(struct acpi_table_header *table)

{

#ifdef CONFIG_X86_PM_TIMER

	/* detect the location of the ACPI PM Timer */

	if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {

		/* FADT rev. 2 */

		if (acpi_gbl_FADT.xpm_timer_block.space_id !=

		    ACPI_ADR_SPACE_SYSTEM_IO)

			return 0;

		pmtmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;

		/*

		 * "X" fields are optional extensions to the original V1.0

		 * fields, so we must selectively expand V1.0 fields if the

		 * corresponding X field is zero.

	 	 */

		if (!pmtmr_ioport)

			pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;

	} else {

		/* FADT rev. 1 */

		pmtmr_ioport = acpi_gbl_FADT.pm_timer_block;

	}

	if (pmtmr_ioport)

		printk(KERN_INFO PREFIX "PM-Timer IO Port: %#x\n",

		       pmtmr_ioport);

#endif

	return 0;

}

#ifdef	CONFIG_X86_IO_APIC

#else

static inline int acpi_parse_madt_ioapic_entries(void)

{

	return -1;

}

#endif	/* !CONFIG_X86_IO_APIC */

static void __init early_acpi_process_madt(void)

{

#ifdef CONFIG_X86_LOCAL_APIC

	int error;

	if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {

		/*

		 * Parse MADT LAPIC entries

		 */

		error = early_acpi_parse_madt_lapic_addr_ovr();

		if (!error) {

			acpi_lapic = 1;

			smp_found_config = 1;

		}

		if (error == -EINVAL) {

			/*

			 * Dell Precision Workstation 410, 610 come here.

			 */

			printk(KERN_ERR PREFIX

			       "Invalid BIOS MADT, disabling ACPI\n");

			disable_acpi();

		}

	}

#endif

}

static void __init acpi_process_madt(void)

{

#ifdef CONFIG_X86_LOCAL_APIC

	int error;

	if (!acpi_table_parse(ACPI_SIG_MADT, acpi_parse_madt)) {

		/*

		 * Parse MADT LAPIC entries

		 */

		error = acpi_parse_madt_lapic_entries();

		if (!error) {

			acpi_lapic = 1;

			/*

			 * Parse MADT IO-APIC entries

			 */

			mutex_lock(&acpi_ioapic_lock);

			error = acpi_parse_madt_ioapic_entries();

			mutex_unlock(&acpi_ioapic_lock);

			if (!error) {

				acpi_set_irq_model_ioapic();

				smp_found_config = 1;

			}

		}

		if (error == -EINVAL) {

			/*

			 * Dell Precision Workstation 410, 610 come here.

			 */

			printk(KERN_ERR PREFIX

			       "Invalid BIOS MADT, disabling ACPI\n");

			disable_acpi();

		}

	} else {

		/*

 		 * ACPI found no MADT, and so ACPI wants UP PIC mode.

 		 * In the event an MPS table was found, forget it.

 		 * Boot with "acpi=off" to use MPS on such a system.

 		 */

		if (smp_found_config) {

			printk(KERN_WARNING PREFIX

				"No APIC-table, disabling MPS\n");

			smp_found_config = 0;

		}

	}

	/*

	 * ACPI supports both logical (e.g. Hyper-Threading) and physical

	 * processors, where MPS only supports physical.

	 */

	if (acpi_lapic && acpi_ioapic)

		printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "

		       "information\n");

	else if (acpi_lapic)

		printk(KERN_INFO "Using ACPI for processor (LAPIC) "

		       "configuration information\n");

#endif

	return;

}

static int __init disable_acpi_irq(const struct dmi_system_id *d)

{

	if (!acpi_force) {

		printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",

		       d->ident);

		acpi_noirq_set();

	}

	return 0;

}

static int __init disable_acpi_pci(const struct dmi_system_id *d)

{

	if (!acpi_force) {

		printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",

		       d->ident);

		acpi_disable_pci();

	}

	return 0;

}

static int __init dmi_disable_acpi(const struct dmi_system_id *d)

{

	if (!acpi_force) {

		printk(KERN_NOTICE "%s detected: acpi off\n", d->ident);

		disable_acpi();

	} else {

		printk(KERN_NOTICE

		       "Warning: DMI blacklist says broken, but acpi forced\n");

	}

	return 0;

}

/*

 * Force ignoring BIOS IRQ0 override

 */

static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)

{

	if (!acpi_skip_timer_override) {

		pr_notice("%s detected: Ignoring BIOS IRQ0 override\n",

			d->ident);

		acpi_skip_timer_override = 1;

	}

	return 0;

}

/*

 * If your system is blacklisted here, but you find that acpi=force

 * works for you, please contact linux-acpi@vger.kernel.org

 */

static struct dmi_system_id __initdata acpi_dmi_table[] = {

	/*

	 * Boxes that need ACPI disabled

	 */

	{

	 .callback = dmi_disable_acpi,

	 .ident = "IBM Thinkpad",

	 .matches = {

		     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),

		     DMI_MATCH(DMI_BOARD_NAME, "2629H1G"),

		     },

	 },

	/*

	 * Boxes that need ACPI PCI IRQ routing disabled

	 */

	{

	 .callback = disable_acpi_irq,

	 .ident = "ASUS A7V",

	 .matches = {

		     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),

		     DMI_MATCH(DMI_BOARD_NAME, ""),

		     /* newer BIOS, Revision 1011, does work */

		     DMI_MATCH(DMI_BIOS_VERSION,

			       "ASUS A7V ACPI BIOS Revision 1007"),

		     },

	 },

	{

		/*

		 * Latest BIOS for IBM 600E (1.16) has bad pcinum

		 * for LPC bridge, which is needed for the PCI

		 * interrupt links to work. DSDT fix is in bug 5966.

		 * 2645, 2646 model numbers are shared with 600/600E/600X

		 */

	 .callback = disable_acpi_irq,

	 .ident = "IBM Thinkpad 600 Series 2645",

	 .matches = {

		     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),

		     DMI_MATCH(DMI_BOARD_NAME, "2645"),

		     },

	 },

	{

	 .callback = disable_acpi_irq,

	 .ident = "IBM Thinkpad 600 Series 2646",

	 .matches = {

		     DMI_MATCH(DMI_BOARD_VENDOR, "IBM"),

		     DMI_MATCH(DMI_BOARD_NAME, "2646"),

		     },

	 },

	/*

	 * Boxes that need ACPI PCI IRQ routing and PCI scan disabled

	 */

	{			/* _BBN 0 bug */

	 .callback = disable_acpi_pci,

	 .ident = "ASUS PR-DLS",

	 .matches = {

		     DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),

		     DMI_MATCH(DMI_BOARD_NAME, "PR-DLS"),

		     DMI_MATCH(DMI_BIOS_VERSION,

			       "ASUS PR-DLS ACPI BIOS Revision 1010"),

		     DMI_MATCH(DMI_BIOS_DATE, "03/21/2003")

		     },

	 },

	{

	 .callback = disable_acpi_pci,

	 .ident = "Acer TravelMate 36x Laptop",

	 .matches = {

		     DMI_MATCH(DMI_SYS_VENDOR, "Acer"),

		     DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),

		     },

	 },

	{}

};

/* second table for DMI checks that should run after early-quirks */

static struct dmi_system_id __initdata acpi_dmi_table_late[] = {

	/*

	 * HP laptops which use a DSDT reporting as HP/SB400/10000,

	 * which includes some code which overrides all temperature

	 * trip points to 16C if the INTIN2 input of the I/O APIC

	 * is enabled.  This input is incorrectly designated the

	 * ISA IRQ 0 via an interrupt source override even though

	 * it is wired to the output of the master 8259A and INTIN0

	 * is not connected at all.  Force ignoring BIOS IRQ0

	 * override in that cases.

	 */

	{

	 .callback = dmi_ignore_irq0_timer_override,

	 .ident = "HP nx6115 laptop",

	 .matches = {

		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),

		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6115"),

		     },

	 },

	{

	 .callback = dmi_ignore_irq0_timer_override,

	 .ident = "HP NX6125 laptop",

	 .matches = {

		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),

		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),

		     },

	 },

	{

	 .callback = dmi_ignore_irq0_timer_override,

	 .ident = "HP NX6325 laptop",

	 .matches = {

		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),

		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),

		     },

	 },

	{

	 .callback = dmi_ignore_irq0_timer_override,

	 .ident = "HP 6715b laptop",

	 .matches = {

		     DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),

		     DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq 6715b"),

		     },

	 },

	{

	 .callback = dmi_ignore_irq0_timer_override,

	 .ident = "FUJITSU SIEMENS",

	 .matches = {

		     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),

		     DMI_MATCH(DMI_PRODUCT_NAME, "AMILO PRO V2030"),

		     },

	 },

	{}

};

/*

 * acpi_boot_table_init() and acpi_boot_init()

 *  called from setup_arch(), always.

 *	1. checksums all tables

 *	2. enumerates lapics

 *	3. enumerates io-apics

 *

 * acpi_table_init() is separate to allow reading SRAT without

 * other side effects.

 *

 * side effects of acpi_boot_init:

 *	acpi_lapic = 1 if LAPIC found

 *	acpi_ioapic = 1 if IOAPIC found

 *	if (acpi_lapic && acpi_ioapic) smp_found_config = 1;

 *	if acpi_blacklisted() acpi_disabled = 1;

 *	acpi_irq_model=...

 *	...

 */

void __init acpi_boot_table_init(void)

{

	dmi_check_system(acpi_dmi_table);

	/*

	 * If acpi_disabled, bail out

	 */

	if (acpi_disabled)

		return;

	/*

	 * Initialize the ACPI boot-time table parser.

	 */

	if (acpi_table_init()) {

		disable_acpi();

		return;

	}

	acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);

	/*

	 * blacklist may disable ACPI entirely

	 */

	if (acpi_blacklisted()) {

		if (acpi_force) {

			printk(KERN_WARNING PREFIX "acpi=force override\n");

		} else {

			printk(KERN_WARNING PREFIX "Disabling ACPI support\n");

			disable_acpi();

			return;

		}

	}

}

int __init early_acpi_boot_init(void)

{

	/*

	 * If acpi_disabled, bail out

	 */

	if (acpi_disabled)

		return 1;

	/*

	 * Process the Multiple APIC Description Table (MADT), if present

	 */

	early_acpi_process_madt();

	/*

	 * Hardware-reduced ACPI mode initialization:

	 */

//	acpi_reduced_hw_init();

	return 0;

}

int __init acpi_boot_init(void)

{

	/* those are executed after early-quirks are executed */

	dmi_check_system(acpi_dmi_table_late);

	/*

	 * If acpi_disabled, bail out

	 */

	if (acpi_disabled)

		return 1;

//	acpi_table_parse(ACPI_SIG_BOOT, acpi_parse_sbf);

	/*

	 * set sci_int and PM timer address

	 */

	acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt);

	/*

	 * Process the Multiple APIC Description Table (MADT), if present

	 */

	acpi_process_madt();

	acpi_table_parse(ACPI_SIG_HPET, acpi_parse_hpet);

//	if (!acpi_noirq)

//		x86_init.pci.init = pci_acpi_init;

	return 0;

}