[deliverable/linux.git] / arch / x86 / kernel / es7000_32.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/atomic.h>
#include <asm/apicdef.h>
#include <mach_mpparse.h>
#include <asm/genapic.h>
#include <asm/setup.h>

/*
 * ES7000 chipsets
 */

#define NON_UNISYS		0
#define ES7000_CLASSIC		1
#define ES7000_ZORRO		2


#define	MIP_REG			1
#define	MIP_PSAI_REG		4

#define	MIP_BUSY		1
#define	MIP_SPIN		0xf0000
#define	MIP_VALID		0x0100000000000000ULL
#define	MIP_PORT(VALUE)	((VALUE >> 32) & 0xffff)

#define	MIP_RD_LO(VALUE)	(VALUE & 0xffffffff)

struct mip_reg_info {
	unsigned long long mip_info;
	unsigned long long delivery_info;
	unsigned long long host_reg;
	unsigned long long mip_reg;
};

struct part_info {
	unsigned char type;
	unsigned char length;
	unsigned char part_id;
	unsigned char apic_mode;
	unsigned long snum;
	char ptype[16];
	char sname[64];
	char pname[64];
};

struct psai {
	unsigned long long entry_type;
	unsigned long long addr;
	unsigned long long bep_addr;
};

struct es7000_mem_info {
	unsigned char type;
	unsigned char length;
	unsigned char resv[6];
	unsigned long long  start;
	unsigned long long  size;
};

struct es7000_oem_table {
	unsigned long long hdr;
	struct mip_reg_info mip;
	struct part_info pif;
	struct es7000_mem_info shm;
	struct psai psai;
};

#ifdef CONFIG_ACPI

struct oem_table {
	struct acpi_table_header Header;
	u32 OEMTableAddr;
	u32 OEMTableSize;
};

extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
#endif

struct mip_reg {
	unsigned long long off_0;
	unsigned long long off_8;
	unsigned long long off_10;
	unsigned long long off_18;
	unsigned long long off_20;
	unsigned long long off_28;
	unsigned long long off_30;
	unsigned long long off_38;
};

#define	MIP_SW_APIC		0x1020b
#define	MIP_FUNC(VALUE)		(VALUE & 0xff)

/*
 * 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;
}

static int wakeup_secondary_cpu_via_mip(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;
}

static void noop_wait_for_deassert(atomic_t *deassert_not_used)
{
}

static int __init es7000_update_genapic(void)
{
	genapic->wakeup_cpu = wakeup_secondary_cpu_via_mip;

	/* MPENTIUMIII */
	if (boot_cpu_data.x86 == 6 &&
	    (boot_cpu_data.x86_model >= 7 || boot_cpu_data.x86_model <= 11)) {
		es7000_update_genapic_to_cluster();
		genapic->wait_for_init_deassert = noop_wait_for_deassert;
		genapic->wakeup_cpu = wakeup_secondary_cpu_via_mip;
	}

	return 0;
}

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;

	x86_quirks->update_genapic = es7000_update_genapic;
}

/*
 * 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);
			pr_debug("es7000_mipcfg: host_reg = 0x%lx \n",
				 (unsigned long)host_reg);
			pr_debug("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
static unsigned long oem_addrX;
static unsigned long oem_size;
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_addrX = t->OEMTableAddr;
			oem_size = t->OEMTableSize;

			*oem_addr = (unsigned long)__acpi_map_table(oem_addrX,
								    oem_size);
			return 0;
		}
	}
	return -1;
}

void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
{
}
#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;
}

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>
b5fe363b	41	#include <asm/atomic.h>
1da177e4	42	#include <asm/apicdef.h>
071922c0	43	#include <mach_mpparse.h>
54ac14a8	44	#include <asm/genapic.h>
569712b2	45	#include <asm/setup.h>
1da177e4	46
1625324d YL	47	/*
	48	* ES7000 chipsets
	49	*/
	50
	51	#define NON_UNISYS 0
	52	#define ES7000_CLASSIC 1
	53	#define ES7000_ZORRO 2
	54
	55
	56	#define MIP_REG 1
	57	#define MIP_PSAI_REG 4
	58
	59	#define MIP_BUSY 1
	60	#define MIP_SPIN 0xf0000
	61	#define MIP_VALID 0x0100000000000000ULL
	62	#define MIP_PORT(VALUE) ((VALUE >> 32) & 0xffff)
	63
	64	#define MIP_RD_LO(VALUE) (VALUE & 0xffffffff)
	65
	66	struct mip_reg_info {
	67	unsigned long long mip_info;
	68	unsigned long long delivery_info;
	69	unsigned long long host_reg;
	70	unsigned long long mip_reg;
	71	};
	72
	73	struct part_info {
	74	unsigned char type;
	75	unsigned char length;
	76	unsigned char part_id;
	77	unsigned char apic_mode;
	78	unsigned long snum;
	79	char ptype[16];
	80	char sname[64];
	81	char pname[64];
	82	};
	83
	84	struct psai {
	85	unsigned long long entry_type;
	86	unsigned long long addr;
	87	unsigned long long bep_addr;
	88	};
	89
	90	struct es7000_mem_info {
	91	unsigned char type;
	92	unsigned char length;
	93	unsigned char resv[6];
	94	unsigned long long start;
	95	unsigned long long size;
	96	};
	97
	98	struct es7000_oem_table {
	99	unsigned long long hdr;
	100	struct mip_reg_info mip;
	101	struct part_info pif;
	102	struct es7000_mem_info shm;
	103	struct psai psai;
	104	};
	105
	106	#ifdef CONFIG_ACPI
	107
	108	struct oem_table {
	109	struct acpi_table_header Header;
	110	u32 OEMTableAddr;
111	u32 OEMTableSize;
112	};
113
114	extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
a73aaedd	115	extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
1625324d YL	116	#endif
	117
	118	struct mip_reg {
	119	unsigned long long off_0;
	120	unsigned long long off_8;
	121	unsigned long long off_10;
	122	unsigned long long off_18;
	123	unsigned long long off_20;
	124	unsigned long long off_28;
	125	unsigned long long off_30;
	126	unsigned long long off_38;
	127	};
	128
	129	#define MIP_SW_APIC 0x1020b
	130	#define MIP_FUNC(VALUE) (VALUE & 0xff)
	131
1da177e4 LT	132	/*
	133	* ES7000 Globals
	134	*/
	135
fb7ae26d AB	136	static volatile unsigned long *psai = NULL;
	137	static struct mip_reg *mip_reg;
	138	static struct mip_reg *host_reg;
	139	static int mip_port;
	140	static unsigned long mip_addr, host_addr;
1da177e4	141
32c50612 AS	142	int es7000_plat;
32c50612 AS	143
1da177e4 LT	144	/*
	145	* GSI override for ES7000 platforms.
	146	*/
	147
	148	static unsigned int base;
	149
	150	static int
	151	es7000_rename_gsi(int ioapic, int gsi)
	152	{
9338316c NP	153	if (es7000_plat == ES7000_ZORRO)
	154	return gsi;
	155
1da177e4 LT	156	if (!base) {
	157	int i;
	158	for (i = 0; i < nr_ioapics; i++)
	159	base += nr_ioapic_registers[i];
	160	}
	161
c7e7964c	162	if (!ioapic && (gsi < 16))
1da177e4 LT	163	gsi += base;
	164	return gsi;
	165	}
	166
569712b2 YL	167	static int wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
	168	{
	169	unsigned long vect = 0, psaival = 0;
	170
	171	if (psai == NULL)
	172	return -1;
	173
	174	vect = ((unsigned long)__pa(eip)/0x1000) << 16;
	175	psaival = (0x1000000 \| vect \| cpu);
	176
	177	while (*psai & 0x1000000)
	178	;
	179
	180	*psai = psaival;
	181
	182	return 0;
	183	}
54ac14a8	184
b5fe363b YL	185	static void noop_wait_for_deassert(atomic_t *deassert_not_used)
	186	{
	187	}
	188
54ac14a8 YL	189	static int __init es7000_update_genapic(void)
	190	{
	191	genapic->wakeup_cpu = wakeup_secondary_cpu_via_mip;
	192
b5fe363b YL	193	/* MPENTIUMIII */
	194	if (boot_cpu_data.x86 == 6 &&
	195	(boot_cpu_data.x86_model >= 7 \|\| boot_cpu_data.x86_model <= 11)) {
	196	es7000_update_genapic_to_cluster();
	197	genapic->wait_for_init_deassert = noop_wait_for_deassert;
	198	genapic->wakeup_cpu = wakeup_secondary_cpu_via_mip;
	199	}
	200
54ac14a8 YL	201	return 0;
54ac14a8 YL	202	}
569712b2	203
56f1d5d5	204	void __init
9338316c	205	setup_unisys(void)
56f1d5d5 NP	206	{
	207	/*
	208	* Determine the generation of the ES7000 currently running.
	209	*
	210	* es7000_plat = 1 if the machine is a 5xx ES7000 box
	211	* es7000_plat = 2 if the machine is a x86_64 ES7000 box
	212	*
	213	*/
	214	if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
9338316c	215	es7000_plat = ES7000_ZORRO;
56f1d5d5	216	else
9338316c	217	es7000_plat = ES7000_CLASSIC;
56f1d5d5	218	ioapic_renumber_irq = es7000_rename_gsi;
54ac14a8	219
54ac14a8	220	x86_quirks->update_genapic = es7000_update_genapic;
56f1d5d5 NP	221	}
56f1d5d5 NP	222
1da177e4 LT	223	/*
	224	* Parse the OEM Table
	225	*/
	226
	227	int __init
56f1d5d5	228	parse_unisys_oem (char *oemptr)
1da177e4 LT	229	{
	230	int i;
	231	int success = 0;
	232	unsigned char type, size;
	233	unsigned long val;
	234	char *tp = NULL;
	235	struct psai *psaip = NULL;
	236	struct mip_reg_info *mi;
	237	struct mip_reg host, mip;
	238
	239	tp = oemptr;
	240
	241	tp += 8;
	242
56f1d5d5	243	for (i=0; i <= 6; i++) {
1da177e4 LT	244	type = *tp++;
	245	size = *tp++;
	246	tp -= 2;
	247	switch (type) {
	248	case MIP_REG:
	249	mi = (struct mip_reg_info *)tp;
	250	val = MIP_RD_LO(mi->host_reg);
	251	host_addr = val;
	252	host = (struct mip_reg *)val;
	253	host_reg = __va(host);
	254	val = MIP_RD_LO(mi->mip_reg);
	255	mip_port = MIP_PORT(mi->mip_info);
	256	mip_addr = val;
	257	mip = (struct mip_reg *)val;
	258	mip_reg = __va(mip);
5171c304 TG	259	pr_debug("es7000_mipcfg: host_reg = 0x%lx \n",
	260	(unsigned long)host_reg);
	261	pr_debug("es7000_mipcfg: mip_reg = 0x%lx \n",
	262	(unsigned long)mip_reg);
1da177e4 LT	263	success++;
	264	break;
	265	case MIP_PSAI_REG:
	266	psaip = (struct psai *)tp;
	267	if (tp != NULL) {
	268	if (psaip->addr)
	269	psai = __va(psaip->addr);
	270	else
	271	psai = NULL;
	272	success++;
	273	}
	274	break;
	275	default:
	276	break;
	277	}
1da177e4 LT	278	tp += size;
	279	}
	280
	281	if (success < 2) {
9338316c	282	es7000_plat = NON_UNISYS;
56f1d5d5 NP	283	} else
56f1d5d5 NP	284	setup_unisys();
1da177e4 LT	285	return es7000_plat;
	286	}
	287
e5428ede	288	#ifdef CONFIG_ACPI
a73aaedd YL	289	static unsigned long oem_addrX;
	290	static unsigned long oem_size;
	291	int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
1da177e4	292	{
ceb6c468 AS	293	struct acpi_table_header *header = NULL;
ceb6c468 AS	294	int i = 0;
a73aaedd	295
d3c6aa1e	296	while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
ceb6c468 AS	297	if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
ceb6c468 AS	298	struct oem_table t = (struct oem_table )header;
a73aaedd YL	299
	300	oem_addrX = t->OEMTableAddr;
	301	oem_size = t->OEMTableSize;
a73aaedd YL	302
	303	*oem_addr = (unsigned long)__acpi_map_table(oem_addrX,
	304	oem_size);
ceb6c468	305	return 0;
1da177e4 LT	306	}
1da177e4 LT	307	}
1da177e4 LT	308	return -1;
1da177e4 LT	309	}
a73aaedd YL	310
	311	void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
	312	{
a73aaedd	313	}
e5428ede	314	#endif
1da177e4 LT	315
	316	static void
	317	es7000_spin(int n)
	318	{
	319	int i = 0;
	320
	321	while (i++ < n)
	322	rep_nop();
	323	}
	324
	325	static int __init
	326	es7000_mip_write(struct mip_reg *mip_reg)
	327	{
	328	int status = 0;
	329	int spin;
	330
	331	spin = MIP_SPIN;
	332	while (((unsigned long long)host_reg->off_38 &
	333	(unsigned long long)MIP_VALID) != 0) {
	334	if (--spin <= 0) {
	335	printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
	336	return -1;
	337	}
	338	es7000_spin(MIP_SPIN);
	339	}
	340
	341	memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
	342	outb(1, mip_port);
	343
	344	spin = MIP_SPIN;
	345
	346	while (((unsigned long long)mip_reg->off_38 &
	347	(unsigned long long)MIP_VALID) == 0) {
	348	if (--spin <= 0) {
	349	printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
	350	return -1;
	351	}
	352	es7000_spin(MIP_SPIN);
	353	}
	354
	355	status = ((unsigned long long)mip_reg->off_0 &
	356	(unsigned long long)0xffff0000000000ULL) >> 48;
	357	mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
	358	(unsigned long long)~MIP_VALID);
	359	return status;
	360	}
	361
1da177e4	362	void __init
fb7ae26d	363	es7000_sw_apic(void)
1da177e4 LT	364	{
	365	if (es7000_plat) {
	366	int mip_status;
	367	struct mip_reg es7000_mip_reg;
	368
	369	printk("ES7000: Enabling APIC mode.\n");
	370	memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
	371	es7000_mip_reg.off_0 = MIP_SW_APIC;
	372	es7000_mip_reg.off_38 = (MIP_VALID);
	373	while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
	374	printk("es7000_sw_apic: command failed, status = %x\n",
	375	mip_status);
	376	return;
	377	}
	378	}