[deliverable/linux.git] / arch / x86 / mach-es7000 / es7000plat.c

/*
 * Written by: Garry Forsgren, Unisys Corporation
 *             Natalie Protasevich, Unisys Corporation
 * This file contains the code to configure and interface
 * with Unisys ES7000 series hardware system manager.
 *
 * Copyright (c) 2003 Unisys Corporation.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Unisys Corporation, Township Line & Union Meeting
 * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or:
 *
 * http://www.unisys.com
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/smp.h>
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/errno.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <asm/io.h>
#include <asm/nmi.h>
#include <asm/smp.h>
#include <asm/apicdef.h>
#include "es7000.h"
#include <mach_mpparse.h>

/*
 * ES7000 Globals
 */

static volatile unsigned long	*psai = NULL;
static struct mip_reg		*mip_reg;
static struct mip_reg		*host_reg;
static int 			mip_port;
static unsigned long		mip_addr, host_addr;

int es7000_plat;

/*
 * GSI override for ES7000 platforms.
 */

static unsigned int base;

static int
es7000_rename_gsi(int ioapic, int gsi)
{
	if (es7000_plat == ES7000_ZORRO)
		return gsi;

	if (!base) {
		int i;
		for (i = 0; i < nr_ioapics; i++)
			base += nr_ioapic_registers[i];
	}

	if (!ioapic && (gsi < 16)) 
		gsi += base;
	return gsi;
}

void __init
setup_unisys(void)
{
	/*
	 * Determine the generation of the ES7000 currently running.
	 *
	 * es7000_plat = 1 if the machine is a 5xx ES7000 box
	 * es7000_plat = 2 if the machine is a x86_64 ES7000 box
	 *
	 */
	if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
		es7000_plat = ES7000_ZORRO;
	else
		es7000_plat = ES7000_CLASSIC;
	ioapic_renumber_irq = es7000_rename_gsi;
}

/*
 * Parse the OEM Table
 */

int __init
parse_unisys_oem (char *oemptr)
{
	int                     i;
	int 			success = 0;
	unsigned char           type, size;
	unsigned long           val;
	char                    *tp = NULL;
	struct psai             *psaip = NULL;
	struct mip_reg_info 	*mi;
	struct mip_reg		*host, *mip;

	tp = oemptr;

	tp += 8;

	for (i=0; i <= 6; i++) {
		type = *tp++;
		size = *tp++;
		tp -= 2;
		switch (type) {
		case MIP_REG:
			mi = (struct mip_reg_info *)tp;
			val = MIP_RD_LO(mi->host_reg);
			host_addr = val;
			host = (struct mip_reg *)val;
			host_reg = __va(host);
			val = MIP_RD_LO(mi->mip_reg);
			mip_port = MIP_PORT(mi->mip_info);
			mip_addr = val;
			mip = (struct mip_reg *)val;
			mip_reg = __va(mip);
			Dprintk("es7000_mipcfg: host_reg = 0x%lx \n",
				(unsigned long)host_reg);
			Dprintk("es7000_mipcfg: mip_reg = 0x%lx \n",
				(unsigned long)mip_reg);
			success++;
			break;
		case MIP_PSAI_REG:
			psaip = (struct psai *)tp;
			if (tp != NULL) {
				if (psaip->addr)
					psai = __va(psaip->addr);
				else
					psai = NULL;
				success++;
			}
			break;
		default:
			break;
		}
		tp += size;
	}

	if (success < 2) {
		es7000_plat = NON_UNISYS;
	} else
		setup_unisys();
	return es7000_plat;
}

#ifdef CONFIG_ACPI
int __init
find_unisys_acpi_oem_table(unsigned long *oem_addr)
{
	struct acpi_table_header *header = NULL;
	int i = 0;
	while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
		if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
			struct oem_table *t = (struct oem_table *)header;
			*oem_addr = (unsigned long)__acpi_map_table(t->OEMTableAddr,
								    t->OEMTableSize);
			return 0;
		}
	}
	return -1;
}
#endif

static void
es7000_spin(int n)
{
	int i = 0;

	while (i++ < n)
		rep_nop();
}

static int __init
es7000_mip_write(struct mip_reg *mip_reg)
{
	int			status = 0;
	int			spin;

	spin = MIP_SPIN;
	while (((unsigned long long)host_reg->off_38 &
		(unsigned long long)MIP_VALID) != 0) {
			if (--spin <= 0) {
				printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
				return -1;
			}
		es7000_spin(MIP_SPIN);
	}

	memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
	outb(1, mip_port);

	spin = MIP_SPIN;

	while (((unsigned long long)mip_reg->off_38 &
		(unsigned long long)MIP_VALID) == 0) {
		if (--spin <= 0) {
			printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
			return -1;
		}
		es7000_spin(MIP_SPIN);
	}

	status = ((unsigned long long)mip_reg->off_0 &
		(unsigned long long)0xffff0000000000ULL) >> 48;
	mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
		(unsigned long long)~MIP_VALID);
	return status;
}

int
es7000_start_cpu(int cpu, unsigned long eip)
{
	unsigned long vect = 0, psaival = 0;

	if (psai == NULL)
		return -1;

	vect = ((unsigned long)__pa(eip)/0x1000) << 16;
	psaival = (0x1000000 | vect | cpu);

	while (*psai & 0x1000000)
                ;

	*psai = psaival;

	return 0;

}

void __init
es7000_sw_apic(void)
{
	if (es7000_plat) {
		int mip_status;
		struct mip_reg es7000_mip_reg;

		printk("ES7000: Enabling APIC mode.\n");
        	memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
        	es7000_mip_reg.off_0 = MIP_SW_APIC;
        	es7000_mip_reg.off_38 = (MIP_VALID);
        	while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
              		printk("es7000_sw_apic: command failed, status = %x\n",
				mip_status);
		return;
	}
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Written by: Garry Forsgren, Unisys Corporation
	3	* Natalie Protasevich, Unisys Corporation
	4	* This file contains the code to configure and interface
	5	* with Unisys ES7000 series hardware system manager.
	6	*
	7	* Copyright (c) 2003 Unisys Corporation. All Rights Reserved.
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of version 2 of the GNU General Public License as
	11	* published by the Free Software Foundation.
	12	*
	13	* This program is distributed in the hope that it would be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
	16	*
	17	* You should have received a copy of the GNU General Public License along
	18	* with this program; if not, write the Free Software Foundation, Inc., 59
	19	* Temple Place - Suite 330, Boston MA 02111-1307, USA.
	20	*
	21	* Contact information: Unisys Corporation, Township Line & Union Meeting
	22	* Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or:
	23	*
	24	* http://www.unisys.com
	25	*/
	26
	27	#include <linux/module.h>
	28	#include <linux/types.h>
	29	#include <linux/kernel.h>
	30	#include <linux/smp.h>
	31	#include <linux/string.h>
	32	#include <linux/spinlock.h>
	33	#include <linux/errno.h>
	34	#include <linux/notifier.h>
	35	#include <linux/reboot.h>
	36	#include <linux/init.h>
	37	#include <linux/acpi.h>
	38	#include <asm/io.h>
	39	#include <asm/nmi.h>
	40	#include <asm/smp.h>
	41	#include <asm/apicdef.h>
	42	#include "es7000.h"
071922c0	43	#include <mach_mpparse.h>
1da177e4 LT	44
	45	/*
	46	* ES7000 Globals
	47	*/
	48
fb7ae26d AB	49	static volatile unsigned long *psai = NULL;
	50	static struct mip_reg *mip_reg;
	51	static struct mip_reg *host_reg;
	52	static int mip_port;
	53	static unsigned long mip_addr, host_addr;
1da177e4	54
32c50612 AS	55	int es7000_plat;
32c50612 AS	56
1da177e4 LT	57	/*
	58	* GSI override for ES7000 platforms.
	59	*/
	60
	61	static unsigned int base;
	62
	63	static int
	64	es7000_rename_gsi(int ioapic, int gsi)
	65	{
9338316c NP	66	if (es7000_plat == ES7000_ZORRO)
	67	return gsi;
	68
1da177e4 LT	69	if (!base) {
	70	int i;
	71	for (i = 0; i < nr_ioapics; i++)
	72	base += nr_ioapic_registers[i];
	73	}
	74
	75	if (!ioapic && (gsi < 16))
	76	gsi += base;
	77	return gsi;
	78	}
	79
56f1d5d5	80	void __init
9338316c	81	setup_unisys(void)
56f1d5d5 NP	82	{
	83	/*
	84	* Determine the generation of the ES7000 currently running.
	85	*
	86	* es7000_plat = 1 if the machine is a 5xx ES7000 box
	87	* es7000_plat = 2 if the machine is a x86_64 ES7000 box
	88	*
	89	*/
	90	if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
9338316c	91	es7000_plat = ES7000_ZORRO;
56f1d5d5	92	else
9338316c	93	es7000_plat = ES7000_CLASSIC;
56f1d5d5 NP	94	ioapic_renumber_irq = es7000_rename_gsi;
	95	}
	96
1da177e4 LT	97	/*
	98	* Parse the OEM Table
	99	*/
	100
	101	int __init
56f1d5d5	102	parse_unisys_oem (char *oemptr)
1da177e4 LT	103	{
	104	int i;
	105	int success = 0;
	106	unsigned char type, size;
	107	unsigned long val;
	108	char *tp = NULL;
	109	struct psai *psaip = NULL;
	110	struct mip_reg_info *mi;
	111	struct mip_reg host, mip;
	112
	113	tp = oemptr;
	114
	115	tp += 8;
	116
56f1d5d5	117	for (i=0; i <= 6; i++) {
1da177e4 LT	118	type = *tp++;
	119	size = *tp++;
	120	tp -= 2;
	121	switch (type) {
	122	case MIP_REG:
	123	mi = (struct mip_reg_info *)tp;
	124	val = MIP_RD_LO(mi->host_reg);
	125	host_addr = val;
	126	host = (struct mip_reg *)val;
	127	host_reg = __va(host);
	128	val = MIP_RD_LO(mi->mip_reg);
	129	mip_port = MIP_PORT(mi->mip_info);
	130	mip_addr = val;
	131	mip = (struct mip_reg *)val;
	132	mip_reg = __va(mip);
	133	Dprintk("es7000_mipcfg: host_reg = 0x%lx \n",
	134	(unsigned long)host_reg);
	135	Dprintk("es7000_mipcfg: mip_reg = 0x%lx \n",
	136	(unsigned long)mip_reg);
	137	success++;
	138	break;
	139	case MIP_PSAI_REG:
	140	psaip = (struct psai *)tp;
	141	if (tp != NULL) {
	142	if (psaip->addr)
	143	psai = __va(psaip->addr);
	144	else
	145	psai = NULL;
	146	success++;
	147	}
	148	break;
	149	default:
	150	break;
	151	}
1da177e4 LT	152	tp += size;
	153	}
	154
	155	if (success < 2) {
9338316c	156	es7000_plat = NON_UNISYS;
56f1d5d5 NP	157	} else
56f1d5d5 NP	158	setup_unisys();
1da177e4 LT	159	return es7000_plat;
	160	}
	161
e5428ede	162	#ifdef CONFIG_ACPI
1da177e4	163	int __init
56f1d5d5	164	find_unisys_acpi_oem_table(unsigned long *oem_addr)
1da177e4	165	{
ceb6c468 AS	166	struct acpi_table_header *header = NULL;
	167	int i = 0;
	168	while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
	169	if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
	170	struct oem_table t = (struct oem_table )header;
	171	*oem_addr = (unsigned long)__acpi_map_table(t->OEMTableAddr,
	172	t->OEMTableSize);
	173	return 0;
1da177e4 LT	174	}
1da177e4 LT	175	}
1da177e4 LT	176	return -1;
1da177e4 LT	177	}
e5428ede	178	#endif
1da177e4 LT	179
	180	static void
	181	es7000_spin(int n)
	182	{
	183	int i = 0;
	184
	185	while (i++ < n)
	186	rep_nop();
	187	}
	188
	189	static int __init
	190	es7000_mip_write(struct mip_reg *mip_reg)
	191	{
	192	int status = 0;
	193	int spin;
	194
	195	spin = MIP_SPIN;
	196	while (((unsigned long long)host_reg->off_38 &
	197	(unsigned long long)MIP_VALID) != 0) {
	198	if (--spin <= 0) {
	199	printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
	200	return -1;
	201	}
	202	es7000_spin(MIP_SPIN);
	203	}
	204
	205	memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
	206	outb(1, mip_port);
	207
	208	spin = MIP_SPIN;
	209
	210	while (((unsigned long long)mip_reg->off_38 &
	211	(unsigned long long)MIP_VALID) == 0) {
	212	if (--spin <= 0) {
	213	printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
	214	return -1;
	215	}
	216	es7000_spin(MIP_SPIN);
	217	}
	218
	219	status = ((unsigned long long)mip_reg->off_0 &
	220	(unsigned long long)0xffff0000000000ULL) >> 48;
	221	mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
	222	(unsigned long long)~MIP_VALID);
	223	return status;
	224	}
	225
	226	int
	227	es7000_start_cpu(int cpu, unsigned long eip)
	228	{
	229	unsigned long vect = 0, psaival = 0;
	230
	231	if (psai == NULL)
	232	return -1;
	233
	234	vect = ((unsigned long)__pa(eip)/0x1000) << 16;
	235	psaival = (0x1000000 \| vect \| cpu);
	236
	237	while (*psai & 0x1000000)
	238	;
	239
	240	*psai = psaival;
	241
	242	return 0;
243
244	}
245
1da177e4	246	void __init
fb7ae26d	247	es7000_sw_apic(void)
1da177e4 LT	248	{
	249	if (es7000_plat) {
	250	int mip_status;
	251	struct mip_reg es7000_mip_reg;
	252
	253	printk("ES7000: Enabling APIC mode.\n");
	254	memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
	255	es7000_mip_reg.off_0 = MIP_SW_APIC;
	256	es7000_mip_reg.off_38 = (MIP_VALID);
	257	while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
	258	printk("es7000_sw_apic: command failed, status = %x\n",
	259	mip_status);
	260	return;
	261	}
	262	}