[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;

/*
 * 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

/*
 * This file also gets compiled if CONFIG_X86_GENERICARCH is set. Generic
 * arch already has got following function definitions (asm-generic/es7000.c)
 * hence no need to define these for that case.
 */
#ifndef CONFIG_X86_GENERICARCH
void es7000_sw_apic(void);
void __init enable_apic_mode(void)
{
	es7000_sw_apic();
	return;
}

__init int mps_oem_check(struct mp_config_table *mpc, char *oem,
		char *productid)
{
	if (mpc->mpc_oemptr) {
		struct mp_config_oemtable *oem_table =
			(struct mp_config_oemtable *)mpc->mpc_oemptr;
		if (!strncmp(oem, "UNISYS", 6))
			return parse_unisys_oem((char *)oem_table);
	}
	return 0;
}
#ifdef CONFIG_ACPI
/* Hook from generic ACPI tables.c */
int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
	unsigned long oem_addr;
	if (!find_unisys_acpi_oem_table(&oem_addr)) {
		if (es7000_check_dsdt())
			return parse_unisys_oem((char *)oem_addr);
		else {
			setup_unisys();
			return 1;
		}
	}
	return 0;
}
#else
int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
{
	return 0;
}
#endif
#endif /* COFIG_X86_GENERICARCH */

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
1da177e4 LT	55	/*
	56	* GSI override for ES7000 platforms.
	57	*/
	58
	59	static unsigned int base;
	60
	61	static int
	62	es7000_rename_gsi(int ioapic, int gsi)
	63	{
9338316c NP	64	if (es7000_plat == ES7000_ZORRO)
	65	return gsi;
	66
1da177e4 LT	67	if (!base) {
	68	int i;
	69	for (i = 0; i < nr_ioapics; i++)
	70	base += nr_ioapic_registers[i];
	71	}
	72
	73	if (!ioapic && (gsi < 16))
	74	gsi += base;
	75	return gsi;
	76	}
	77
56f1d5d5	78	void __init
9338316c	79	setup_unisys(void)
56f1d5d5 NP	80	{
	81	/*
	82	* Determine the generation of the ES7000 currently running.
	83	*
	84	* es7000_plat = 1 if the machine is a 5xx ES7000 box
	85	* es7000_plat = 2 if the machine is a x86_64 ES7000 box
	86	*
	87	*/
	88	if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
9338316c	89	es7000_plat = ES7000_ZORRO;
56f1d5d5	90	else
9338316c	91	es7000_plat = ES7000_CLASSIC;
56f1d5d5 NP	92	ioapic_renumber_irq = es7000_rename_gsi;
	93	}
	94
1da177e4 LT	95	/*
	96	* Parse the OEM Table
	97	*/
	98
	99	int __init
56f1d5d5	100	parse_unisys_oem (char *oemptr)
1da177e4 LT	101	{
	102	int i;
	103	int success = 0;
	104	unsigned char type, size;
	105	unsigned long val;
	106	char *tp = NULL;
	107	struct psai *psaip = NULL;
	108	struct mip_reg_info *mi;
	109	struct mip_reg host, mip;
	110
	111	tp = oemptr;
	112
	113	tp += 8;
	114
56f1d5d5	115	for (i=0; i <= 6; i++) {
1da177e4 LT	116	type = *tp++;
	117	size = *tp++;
	118	tp -= 2;
	119	switch (type) {
	120	case MIP_REG:
	121	mi = (struct mip_reg_info *)tp;
	122	val = MIP_RD_LO(mi->host_reg);
	123	host_addr = val;
	124	host = (struct mip_reg *)val;
	125	host_reg = __va(host);
	126	val = MIP_RD_LO(mi->mip_reg);
	127	mip_port = MIP_PORT(mi->mip_info);
	128	mip_addr = val;
	129	mip = (struct mip_reg *)val;
	130	mip_reg = __va(mip);
	131	Dprintk("es7000_mipcfg: host_reg = 0x%lx \n",
	132	(unsigned long)host_reg);
	133	Dprintk("es7000_mipcfg: mip_reg = 0x%lx \n",
	134	(unsigned long)mip_reg);
	135	success++;
	136	break;
	137	case MIP_PSAI_REG:
	138	psaip = (struct psai *)tp;
	139	if (tp != NULL) {
	140	if (psaip->addr)
	141	psai = __va(psaip->addr);
	142	else
	143	psai = NULL;
	144	success++;
	145	}
	146	break;
	147	default:
	148	break;
	149	}
1da177e4 LT	150	tp += size;
	151	}
	152
	153	if (success < 2) {
9338316c	154	es7000_plat = NON_UNISYS;
56f1d5d5 NP	155	} else
56f1d5d5 NP	156	setup_unisys();
1da177e4 LT	157	return es7000_plat;
	158	}
	159
e5428ede	160	#ifdef CONFIG_ACPI
1da177e4	161	int __init
56f1d5d5	162	find_unisys_acpi_oem_table(unsigned long *oem_addr)
1da177e4	163	{
ceb6c468 AS	164	struct acpi_table_header *header = NULL;
	165	int i = 0;
	166	while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
	167	if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
	168	struct oem_table t = (struct oem_table )header;
	169	*oem_addr = (unsigned long)__acpi_map_table(t->OEMTableAddr,
	170	t->OEMTableSize);
	171	return 0;
1da177e4 LT	172	}
1da177e4 LT	173	}
1da177e4 LT	174	return -1;
1da177e4 LT	175	}
e5428ede	176	#endif
1da177e4	177
071922c0 VG	178	/*
	179	* This file also gets compiled if CONFIG_X86_GENERICARCH is set. Generic
	180	* arch already has got following function definitions (asm-generic/es7000.c)
	181	* hence no need to define these for that case.
	182	*/
	183	#ifndef CONFIG_X86_GENERICARCH
	184	void es7000_sw_apic(void);
	185	void __init enable_apic_mode(void)
	186	{
	187	es7000_sw_apic();
	188	return;
	189	}
	190
	191	__init int mps_oem_check(struct mp_config_table mpc, char oem,
	192	char *productid)
	193	{
	194	if (mpc->mpc_oemptr) {
	195	struct mp_config_oemtable *oem_table =
	196	(struct mp_config_oemtable *)mpc->mpc_oemptr;
	197	if (!strncmp(oem, "UNISYS", 6))
	198	return parse_unisys_oem((char *)oem_table);
	199	}
	200	return 0;
	201	}
	202	#ifdef CONFIG_ACPI
	203	/* Hook from generic ACPI tables.c */
	204	int __init acpi_madt_oem_check(char oem_id, char oem_table_id)
	205	{
	206	unsigned long oem_addr;
	207	if (!find_unisys_acpi_oem_table(&oem_addr)) {
	208	if (es7000_check_dsdt())
	209	return parse_unisys_oem((char *)oem_addr);
	210	else {
	211	setup_unisys();
	212	return 1;
	213	}
	214	}
	215	return 0;
	216	}
	217	#else
	218	int __init acpi_madt_oem_check(char oem_id, char oem_table_id)
	219	{
	220	return 0;
	221	}
	222	#endif
	223	#endif /* COFIG_X86_GENERICARCH */
	224
1da177e4 LT	225	static void
	226	es7000_spin(int n)
	227	{
	228	int i = 0;
	229
	230	while (i++ < n)
	231	rep_nop();
	232	}
	233
	234	static int __init
	235	es7000_mip_write(struct mip_reg *mip_reg)
	236	{
	237	int status = 0;
	238	int spin;
	239
	240	spin = MIP_SPIN;
	241	while (((unsigned long long)host_reg->off_38 &
	242	(unsigned long long)MIP_VALID) != 0) {
	243	if (--spin <= 0) {
	244	printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
	245	return -1;
	246	}
	247	es7000_spin(MIP_SPIN);
	248	}
	249
	250	memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
	251	outb(1, mip_port);
	252
	253	spin = MIP_SPIN;
	254
	255	while (((unsigned long long)mip_reg->off_38 &
	256	(unsigned long long)MIP_VALID) == 0) {
	257	if (--spin <= 0) {
	258	printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
	259	return -1;
	260	}
	261	es7000_spin(MIP_SPIN);
	262	}
	263
	264	status = ((unsigned long long)mip_reg->off_0 &
	265	(unsigned long long)0xffff0000000000ULL) >> 48;
	266	mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
	267	(unsigned long long)~MIP_VALID);
	268	return status;
	269	}
	270
	271	int
	272	es7000_start_cpu(int cpu, unsigned long eip)
	273	{
	274	unsigned long vect = 0, psaival = 0;
	275
	276	if (psai == NULL)
	277	return -1;
	278
	279	vect = ((unsigned long)__pa(eip)/0x1000) << 16;
	280	psaival = (0x1000000 \| vect \| cpu);
	281
	282	while (*psai & 0x1000000)
	283	;
	284
	285	*psai = psaival;
	286
	287	return 0;
	288
289	}
290
1da177e4	291	void __init
fb7ae26d	292	es7000_sw_apic(void)
1da177e4 LT	293	{
	294	if (es7000_plat) {
	295	int mip_status;
	296	struct mip_reg es7000_mip_reg;
	297
	298	printk("ES7000: Enabling APIC mode.\n");
	299	memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
	300	es7000_mip_reg.off_0 = MIP_SW_APIC;
	301	es7000_mip_reg.off_38 = (MIP_VALID);
	302	while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
	303	printk("es7000_sw_apic: command failed, status = %x\n",
	304	mip_status);
	305	return;
	306	}
	307	}