[linux-2.6-block.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/apicdef.h>
#include <mach_mpparse.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;
}

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);
			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;
}

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>
071922c0	42	#include <mach_mpparse.h>
1da177e4	43
1625324d YL	44	/*
	45	* ES7000 chipsets
	46	*/
	47
	48	#define NON_UNISYS 0
	49	#define ES7000_CLASSIC 1
	50	#define ES7000_ZORRO 2
	51
	52
	53	#define MIP_REG 1
	54	#define MIP_PSAI_REG 4
	55
	56	#define MIP_BUSY 1
	57	#define MIP_SPIN 0xf0000
	58	#define MIP_VALID 0x0100000000000000ULL
	59	#define MIP_PORT(VALUE) ((VALUE >> 32) & 0xffff)
	60
	61	#define MIP_RD_LO(VALUE) (VALUE & 0xffffffff)
	62
	63	struct mip_reg_info {
	64	unsigned long long mip_info;
	65	unsigned long long delivery_info;
	66	unsigned long long host_reg;
	67	unsigned long long mip_reg;
	68	};
	69
	70	struct part_info {
	71	unsigned char type;
	72	unsigned char length;
	73	unsigned char part_id;
	74	unsigned char apic_mode;
	75	unsigned long snum;
	76	char ptype[16];
	77	char sname[64];
	78	char pname[64];
	79	};
	80
	81	struct psai {
	82	unsigned long long entry_type;
	83	unsigned long long addr;
	84	unsigned long long bep_addr;
	85	};
	86
	87	struct es7000_mem_info {
	88	unsigned char type;
	89	unsigned char length;
	90	unsigned char resv[6];
	91	unsigned long long start;
	92	unsigned long long size;
	93	};
	94
	95	struct es7000_oem_table {
	96	unsigned long long hdr;
	97	struct mip_reg_info mip;
	98	struct part_info pif;
	99	struct es7000_mem_info shm;
	100	struct psai psai;
	101	};
	102
	103	#ifdef CONFIG_ACPI
	104
	105	struct oem_table {
	106	struct acpi_table_header Header;
	107	u32 OEMTableAddr;
108	u32 OEMTableSize;
109	};
110
111	extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
a73aaedd	112	extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
1625324d YL	113	#endif
	114
	115	struct mip_reg {
	116	unsigned long long off_0;
	117	unsigned long long off_8;
	118	unsigned long long off_10;
	119	unsigned long long off_18;
	120	unsigned long long off_20;
	121	unsigned long long off_28;
	122	unsigned long long off_30;
	123	unsigned long long off_38;
	124	};
	125
	126	#define MIP_SW_APIC 0x1020b
	127	#define MIP_FUNC(VALUE) (VALUE & 0xff)
	128
1da177e4 LT	129	/*
	130	* ES7000 Globals
	131	*/
	132
fb7ae26d AB	133	static volatile unsigned long *psai = NULL;
	134	static struct mip_reg *mip_reg;
	135	static struct mip_reg *host_reg;
	136	static int mip_port;
	137	static unsigned long mip_addr, host_addr;
1da177e4	138
32c50612 AS	139	int es7000_plat;
32c50612 AS	140
1da177e4 LT	141	/*
	142	* GSI override for ES7000 platforms.
	143	*/
	144
	145	static unsigned int base;
	146
	147	static int
	148	es7000_rename_gsi(int ioapic, int gsi)
	149	{
9338316c NP	150	if (es7000_plat == ES7000_ZORRO)
	151	return gsi;
	152
1da177e4 LT	153	if (!base) {
	154	int i;
	155	for (i = 0; i < nr_ioapics; i++)
	156	base += nr_ioapic_registers[i];
	157	}
	158
c7e7964c	159	if (!ioapic && (gsi < 16))
1da177e4 LT	160	gsi += base;
	161	return gsi;
	162	}
	163
56f1d5d5	164	void __init
9338316c	165	setup_unisys(void)
56f1d5d5 NP	166	{
	167	/*
	168	* Determine the generation of the ES7000 currently running.
	169	*
	170	* es7000_plat = 1 if the machine is a 5xx ES7000 box
	171	* es7000_plat = 2 if the machine is a x86_64 ES7000 box
	172	*
	173	*/
	174	if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
9338316c	175	es7000_plat = ES7000_ZORRO;
56f1d5d5	176	else
9338316c	177	es7000_plat = ES7000_CLASSIC;
56f1d5d5 NP	178	ioapic_renumber_irq = es7000_rename_gsi;
	179	}
	180
1da177e4 LT	181	/*
	182	* Parse the OEM Table
	183	*/
	184
	185	int __init
56f1d5d5	186	parse_unisys_oem (char *oemptr)
1da177e4 LT	187	{
	188	int i;
	189	int success = 0;
	190	unsigned char type, size;
	191	unsigned long val;
	192	char *tp = NULL;
	193	struct psai *psaip = NULL;
	194	struct mip_reg_info *mi;
	195	struct mip_reg host, mip;
	196
	197	tp = oemptr;
	198
	199	tp += 8;
	200
56f1d5d5	201	for (i=0; i <= 6; i++) {
1da177e4 LT	202	type = *tp++;
	203	size = *tp++;
	204	tp -= 2;
	205	switch (type) {
	206	case MIP_REG:
	207	mi = (struct mip_reg_info *)tp;
	208	val = MIP_RD_LO(mi->host_reg);
	209	host_addr = val;
	210	host = (struct mip_reg *)val;
	211	host_reg = __va(host);
	212	val = MIP_RD_LO(mi->mip_reg);
	213	mip_port = MIP_PORT(mi->mip_info);
	214	mip_addr = val;
	215	mip = (struct mip_reg *)val;
	216	mip_reg = __va(mip);
5171c304 TG	217	pr_debug("es7000_mipcfg: host_reg = 0x%lx \n",
	218	(unsigned long)host_reg);
	219	pr_debug("es7000_mipcfg: mip_reg = 0x%lx \n",
	220	(unsigned long)mip_reg);
1da177e4 LT	221	success++;
	222	break;
	223	case MIP_PSAI_REG:
	224	psaip = (struct psai *)tp;
	225	if (tp != NULL) {
	226	if (psaip->addr)
	227	psai = __va(psaip->addr);
	228	else
	229	psai = NULL;
	230	success++;
	231	}
	232	break;
	233	default:
	234	break;
	235	}
1da177e4 LT	236	tp += size;
	237	}
	238
	239	if (success < 2) {
9338316c	240	es7000_plat = NON_UNISYS;
56f1d5d5 NP	241	} else
56f1d5d5 NP	242	setup_unisys();
1da177e4 LT	243	return es7000_plat;
	244	}
	245
e5428ede	246	#ifdef CONFIG_ACPI
a73aaedd YL	247	static unsigned long oem_addrX;
	248	static unsigned long oem_size;
	249	int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
1da177e4	250	{
ceb6c468 AS	251	struct acpi_table_header *header = NULL;
ceb6c468 AS	252	int i = 0;
a73aaedd	253
d3c6aa1e	254	while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
ceb6c468 AS	255	if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
ceb6c468 AS	256	struct oem_table t = (struct oem_table )header;
a73aaedd YL	257
	258	oem_addrX = t->OEMTableAddr;
	259	oem_size = t->OEMTableSize;
a73aaedd YL	260
	261	*oem_addr = (unsigned long)__acpi_map_table(oem_addrX,
	262	oem_size);
ceb6c468	263	return 0;
1da177e4 LT	264	}
1da177e4 LT	265	}
1da177e4 LT	266	return -1;
1da177e4 LT	267	}
a73aaedd YL	268
	269	void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
	270	{
a73aaedd	271	}
e5428ede	272	#endif
1da177e4 LT	273
	274	static void
	275	es7000_spin(int n)
	276	{
	277	int i = 0;
	278
	279	while (i++ < n)
	280	rep_nop();
	281	}
	282
	283	static int __init
	284	es7000_mip_write(struct mip_reg *mip_reg)
	285	{
	286	int status = 0;
	287	int spin;
	288
	289	spin = MIP_SPIN;
	290	while (((unsigned long long)host_reg->off_38 &
	291	(unsigned long long)MIP_VALID) != 0) {
	292	if (--spin <= 0) {
	293	printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
	294	return -1;
	295	}
	296	es7000_spin(MIP_SPIN);
	297	}
	298
	299	memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
	300	outb(1, mip_port);
	301
	302	spin = MIP_SPIN;
	303
	304	while (((unsigned long long)mip_reg->off_38 &
	305	(unsigned long long)MIP_VALID) == 0) {
	306	if (--spin <= 0) {
	307	printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
	308	return -1;
	309	}
	310	es7000_spin(MIP_SPIN);
	311	}
	312
	313	status = ((unsigned long long)mip_reg->off_0 &
	314	(unsigned long long)0xffff0000000000ULL) >> 48;
	315	mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
	316	(unsigned long long)~MIP_VALID);
	317	return status;
	318	}
	319
	320	int
	321	es7000_start_cpu(int cpu, unsigned long eip)
	322	{
	323	unsigned long vect = 0, psaival = 0;
	324
	325	if (psai == NULL)
	326	return -1;
	327
	328	vect = ((unsigned long)__pa(eip)/0x1000) << 16;
	329	psaival = (0x1000000 \| vect \| cpu);
	330
	331	while (*psai & 0x1000000)
	332	;
	333
	334	*psai = psaival;
	335
	336	return 0;
337
338	}
339
1da177e4	340	void __init
fb7ae26d	341	es7000_sw_apic(void)
1da177e4 LT	342	{
	343	if (es7000_plat) {
	344	int mip_status;
	345	struct mip_reg es7000_mip_reg;
	346
	347	printk("ES7000: Enabling APIC mode.\n");
	348	memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
	349	es7000_mip_reg.off_0 = MIP_SW_APIC;
	350	es7000_mip_reg.off_38 = (MIP_VALID);
	351	while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
	352	printk("es7000_sw_apic: command failed, status = %x\n",
	353	mip_status);
	354	return;
	355	}
	356	}