[deliverable/linux.git] / arch / i386 / 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"

/*
 * ES7000 Globals
 */

volatile unsigned long	*psai = NULL;
struct mip_reg		*mip_reg;
struct mip_reg		*host_reg;
int 			mip_port;
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

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;

}

int
es7000_stop_cpu(int cpu)
{
	int startup;

	if (psai == NULL)
		return -1;

	startup= (0x1000000 | cpu);

	while ((*psai & 0xff00ffff) != startup)
		;

	startup = (*psai & 0xff0000) >> 16;
	*psai &= 0xffffff;

	return 0;

}

void __init
es7000_sw_apic()
{
	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"
	43
	44	/*
	45	* ES7000 Globals
	46	*/
	47
	48	volatile unsigned long *psai = NULL;
	49	struct mip_reg *mip_reg;
	50	struct mip_reg *host_reg;
	51	int mip_port;
	52	unsigned long mip_addr, host_addr;
	53
1da177e4 LT	54	/*
	55	* GSI override for ES7000 platforms.
	56	*/
	57
	58	static unsigned int base;
	59
	60	static int
	61	es7000_rename_gsi(int ioapic, int gsi)
	62	{
9338316c NP	63	if (es7000_plat == ES7000_ZORRO)
	64	return gsi;
	65
1da177e4 LT	66	if (!base) {
	67	int i;
	68	for (i = 0; i < nr_ioapics; i++)
	69	base += nr_ioapic_registers[i];
	70	}
	71
	72	if (!ioapic && (gsi < 16))
	73	gsi += base;
	74	return gsi;
	75	}
	76
56f1d5d5	77	void __init
9338316c	78	setup_unisys(void)
56f1d5d5 NP	79	{
	80	/*
	81	* Determine the generation of the ES7000 currently running.
	82	*
	83	* es7000_plat = 1 if the machine is a 5xx ES7000 box
	84	* es7000_plat = 2 if the machine is a x86_64 ES7000 box
	85	*
	86	*/
	87	if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
9338316c	88	es7000_plat = ES7000_ZORRO;
56f1d5d5	89	else
9338316c	90	es7000_plat = ES7000_CLASSIC;
56f1d5d5 NP	91	ioapic_renumber_irq = es7000_rename_gsi;
	92	}
	93
1da177e4 LT	94	/*
	95	* Parse the OEM Table
	96	*/
	97
	98	int __init
56f1d5d5	99	parse_unisys_oem (char *oemptr)
1da177e4 LT	100	{
	101	int i;
	102	int success = 0;
	103	unsigned char type, size;
	104	unsigned long val;
	105	char *tp = NULL;
	106	struct psai *psaip = NULL;
	107	struct mip_reg_info *mi;
	108	struct mip_reg host, mip;
	109
	110	tp = oemptr;
	111
	112	tp += 8;
	113
56f1d5d5	114	for (i=0; i <= 6; i++) {
1da177e4 LT	115	type = *tp++;
	116	size = *tp++;
	117	tp -= 2;
	118	switch (type) {
	119	case MIP_REG:
	120	mi = (struct mip_reg_info *)tp;
	121	val = MIP_RD_LO(mi->host_reg);
	122	host_addr = val;
	123	host = (struct mip_reg *)val;
	124	host_reg = __va(host);
	125	val = MIP_RD_LO(mi->mip_reg);
	126	mip_port = MIP_PORT(mi->mip_info);
	127	mip_addr = val;
	128	mip = (struct mip_reg *)val;
	129	mip_reg = __va(mip);
	130	Dprintk("es7000_mipcfg: host_reg = 0x%lx \n",
	131	(unsigned long)host_reg);
	132	Dprintk("es7000_mipcfg: mip_reg = 0x%lx \n",
	133	(unsigned long)mip_reg);
	134	success++;
	135	break;
	136	case MIP_PSAI_REG:
	137	psaip = (struct psai *)tp;
	138	if (tp != NULL) {
	139	if (psaip->addr)
	140	psai = __va(psaip->addr);
	141	else
	142	psai = NULL;
	143	success++;
	144	}
	145	break;
	146	default:
	147	break;
	148	}
1da177e4 LT	149	tp += size;
	150	}
	151
	152	if (success < 2) {
9338316c	153	es7000_plat = NON_UNISYS;
56f1d5d5 NP	154	} else
56f1d5d5 NP	155	setup_unisys();
1da177e4 LT	156	return es7000_plat;
	157	}
	158
e5428ede	159	#ifdef CONFIG_ACPI
1da177e4	160	int __init
56f1d5d5	161	find_unisys_acpi_oem_table(unsigned long *oem_addr)
1da177e4	162	{
ceb6c468 AS	163	struct acpi_table_header *header = NULL;
	164	int i = 0;
	165	while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
	166	if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
	167	struct oem_table t = (struct oem_table )header;
	168	*oem_addr = (unsigned long)__acpi_map_table(t->OEMTableAddr,
	169	t->OEMTableSize);
	170	return 0;
1da177e4 LT	171	}
1da177e4 LT	172	}
1da177e4 LT	173	return -1;
1da177e4 LT	174	}
e5428ede	175	#endif
1da177e4 LT	176
	177	static void
	178	es7000_spin(int n)
	179	{
	180	int i = 0;
	181
	182	while (i++ < n)
	183	rep_nop();
	184	}
	185
	186	static int __init
	187	es7000_mip_write(struct mip_reg *mip_reg)
	188	{
	189	int status = 0;
	190	int spin;
	191
	192	spin = MIP_SPIN;
	193	while (((unsigned long long)host_reg->off_38 &
	194	(unsigned long long)MIP_VALID) != 0) {
	195	if (--spin <= 0) {
	196	printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
	197	return -1;
	198	}
	199	es7000_spin(MIP_SPIN);
	200	}
	201
	202	memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
	203	outb(1, mip_port);
	204
	205	spin = MIP_SPIN;
	206
	207	while (((unsigned long long)mip_reg->off_38 &
	208	(unsigned long long)MIP_VALID) == 0) {
	209	if (--spin <= 0) {
	210	printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
	211	return -1;
	212	}
	213	es7000_spin(MIP_SPIN);
	214	}
	215
	216	status = ((unsigned long long)mip_reg->off_0 &
	217	(unsigned long long)0xffff0000000000ULL) >> 48;
	218	mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
	219	(unsigned long long)~MIP_VALID);
	220	return status;
	221	}
	222
	223	int
	224	es7000_start_cpu(int cpu, unsigned long eip)
	225	{
	226	unsigned long vect = 0, psaival = 0;
	227
	228	if (psai == NULL)
	229	return -1;
	230
	231	vect = ((unsigned long)__pa(eip)/0x1000) << 16;
	232	psaival = (0x1000000 \| vect \| cpu);
	233
	234	while (*psai & 0x1000000)
	235	;
	236
	237	*psai = psaival;
	238
	239	return 0;
240
241	}
242
243	int
244	es7000_stop_cpu(int cpu)
245	{
246	int startup;
247
248	if (psai == NULL)
249	return -1;
250
251	startup= (0x1000000 \| cpu);
252
253	while ((*psai & 0xff00ffff) != startup)
254	;
255
256	startup = (*psai & 0xff0000) >> 16;
257	*psai &= 0xffffff;
258
259	return 0;
260
261	}
262
263	void __init
264	es7000_sw_apic()
265	{
266	if (es7000_plat) {
267	int mip_status;
268	struct mip_reg es7000_mip_reg;
269
270	printk("ES7000: Enabling APIC mode.\n");
271	memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
272	es7000_mip_reg.off_0 = MIP_SW_APIC;
273	es7000_mip_reg.off_38 = (MIP_VALID);
274	while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
275	printk("es7000_sw_apic: command failed, status = %x\n",
276	mip_status);
277	return;
278	}
279	}