[linux-block.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;

#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI)

/*
 * 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;
}

#endif	/* (CONFIG_X86_IO_APIC) && (CONFIG_ACPI) */

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;
}

int __init
find_unisys_acpi_oem_table(unsigned long *oem_addr)
{
	struct acpi_table_rsdp		*rsdp = NULL;
	unsigned long			rsdp_phys = 0;
	struct acpi_table_header 	*header = NULL;
	int				i;
	struct acpi_table_sdt		sdt;

	rsdp_phys = acpi_find_rsdp();
	rsdp = __va(rsdp_phys);
	if (rsdp->rsdt_address) {
		struct acpi_table_rsdt	*mapped_rsdt = NULL;
		sdt.pa = rsdp->rsdt_address;

		header = (struct acpi_table_header *)
			__acpi_map_table(sdt.pa, sizeof(struct acpi_table_header));
		if (!header)
			return -ENODEV;

		sdt.count = (header->length - sizeof(struct acpi_table_header)) >> 3;
		mapped_rsdt = (struct acpi_table_rsdt *)
			__acpi_map_table(sdt.pa, header->length);
		if (!mapped_rsdt)
			return -ENODEV;

		header = &mapped_rsdt->header;

		for (i = 0; i < sdt.count; i++)
			sdt.entry[i].pa = (unsigned long) mapped_rsdt->entry[i];
	};
	for (i = 0; i < sdt.count; i++) {

		header = (struct acpi_table_header *)
			__acpi_map_table(sdt.entry[i].pa,
				sizeof(struct acpi_table_header));
		if (!header)
			continue;
		if (!strncmp((char *) &header->signature, "OEM1", 4)) {
			if (!strncmp((char *) &header->oem_id, "UNISYS", 6)) {
				void *addr;
				struct oem_table *t;
				acpi_table_print(header, sdt.entry[i].pa);
				t = (struct oem_table *) __acpi_map_table(sdt.entry[i].pa, header->length);
				addr = (void *) __acpi_map_table(t->OEMTableAddr, t->OEMTableSize);
				*oem_addr = (unsigned long) addr;
				return 0;
			}
		}
	}
	return -1;
}

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
8466361a	54	#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_ACPI)
1da177e4 LT	55
	56	/*
	57	* GSI override for ES7000 platforms.
	58	*/
	59
	60	static unsigned int base;
	61
	62	static int
	63	es7000_rename_gsi(int ioapic, int gsi)
	64	{
9338316c NP	65	if (es7000_plat == ES7000_ZORRO)
	66	return gsi;
	67
1da177e4 LT	68	if (!base) {
	69	int i;
	70	for (i = 0; i < nr_ioapics; i++)
	71	base += nr_ioapic_registers[i];
	72	}
	73
	74	if (!ioapic && (gsi < 16))
	75	gsi += base;
	76	return gsi;
	77	}
	78
8466361a	79	#endif /* (CONFIG_X86_IO_APIC) && (CONFIG_ACPI) */
1da177e4	80
56f1d5d5	81	void __init
9338316c	82	setup_unisys(void)
56f1d5d5 NP	83	{
	84	/*
	85	* Determine the generation of the ES7000 currently running.
	86	*
	87	* es7000_plat = 1 if the machine is a 5xx ES7000 box
	88	* es7000_plat = 2 if the machine is a x86_64 ES7000 box
	89	*
	90	*/
	91	if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
9338316c	92	es7000_plat = ES7000_ZORRO;
56f1d5d5	93	else
9338316c	94	es7000_plat = ES7000_CLASSIC;
56f1d5d5 NP	95	ioapic_renumber_irq = es7000_rename_gsi;
	96	}
	97
1da177e4 LT	98	/*
	99	* Parse the OEM Table
	100	*/
	101
	102	int __init
56f1d5d5	103	parse_unisys_oem (char *oemptr)
1da177e4 LT	104	{
	105	int i;
	106	int success = 0;
	107	unsigned char type, size;
	108	unsigned long val;
	109	char *tp = NULL;
	110	struct psai *psaip = NULL;
	111	struct mip_reg_info *mi;
	112	struct mip_reg host, mip;
	113
	114	tp = oemptr;
	115
	116	tp += 8;
	117
56f1d5d5	118	for (i=0; i <= 6; i++) {
1da177e4 LT	119	type = *tp++;
	120	size = *tp++;
	121	tp -= 2;
	122	switch (type) {
	123	case MIP_REG:
	124	mi = (struct mip_reg_info *)tp;
	125	val = MIP_RD_LO(mi->host_reg);
	126	host_addr = val;
	127	host = (struct mip_reg *)val;
	128	host_reg = __va(host);
	129	val = MIP_RD_LO(mi->mip_reg);
	130	mip_port = MIP_PORT(mi->mip_info);
	131	mip_addr = val;
	132	mip = (struct mip_reg *)val;
	133	mip_reg = __va(mip);
	134	Dprintk("es7000_mipcfg: host_reg = 0x%lx \n",
	135	(unsigned long)host_reg);
	136	Dprintk("es7000_mipcfg: mip_reg = 0x%lx \n",
	137	(unsigned long)mip_reg);
	138	success++;
	139	break;
	140	case MIP_PSAI_REG:
	141	psaip = (struct psai *)tp;
	142	if (tp != NULL) {
	143	if (psaip->addr)
	144	psai = __va(psaip->addr);
	145	else
	146	psai = NULL;
	147	success++;
	148	}
	149	break;
	150	default:
	151	break;
	152	}
1da177e4 LT	153	tp += size;
	154	}
	155
	156	if (success < 2) {
9338316c	157	es7000_plat = NON_UNISYS;
56f1d5d5 NP	158	} else
56f1d5d5 NP	159	setup_unisys();
1da177e4 LT	160	return es7000_plat;
	161	}
	162
	163	int __init
56f1d5d5	164	find_unisys_acpi_oem_table(unsigned long *oem_addr)
1da177e4 LT	165	{
	166	struct acpi_table_rsdp *rsdp = NULL;
	167	unsigned long rsdp_phys = 0;
	168	struct acpi_table_header *header = NULL;
	169	int i;
	170	struct acpi_table_sdt sdt;
	171
	172	rsdp_phys = acpi_find_rsdp();
	173	rsdp = __va(rsdp_phys);
	174	if (rsdp->rsdt_address) {
	175	struct acpi_table_rsdt *mapped_rsdt = NULL;
	176	sdt.pa = rsdp->rsdt_address;
	177
	178	header = (struct acpi_table_header *)
	179	__acpi_map_table(sdt.pa, sizeof(struct acpi_table_header));
	180	if (!header)
	181	return -ENODEV;
	182
	183	sdt.count = (header->length - sizeof(struct acpi_table_header)) >> 3;
	184	mapped_rsdt = (struct acpi_table_rsdt *)
	185	__acpi_map_table(sdt.pa, header->length);
	186	if (!mapped_rsdt)
	187	return -ENODEV;
	188
	189	header = &mapped_rsdt->header;
	190
	191	for (i = 0; i < sdt.count; i++)
	192	sdt.entry[i].pa = (unsigned long) mapped_rsdt->entry[i];
	193	};
	194	for (i = 0; i < sdt.count; i++) {
	195
	196	header = (struct acpi_table_header *)
	197	__acpi_map_table(sdt.entry[i].pa,
	198	sizeof(struct acpi_table_header));
	199	if (!header)
	200	continue;
	201	if (!strncmp((char *) &header->signature, "OEM1", 4)) {
	202	if (!strncmp((char *) &header->oem_id, "UNISYS", 6)) {
	203	void *addr;
	204	struct oem_table *t;
	205	acpi_table_print(header, sdt.entry[i].pa);
	206	t = (struct oem_table *) __acpi_map_table(sdt.entry[i].pa, header->length);
	207	addr = (void *) __acpi_map_table(t->OEMTableAddr, t->OEMTableSize);
1da177e4 LT	208	*oem_addr = (unsigned long) addr;
	209	return 0;
	210	}
	211	}
	212	}
1da177e4 LT	213	return -1;
	214	}
	215
	216	static void
	217	es7000_spin(int n)
	218	{
	219	int i = 0;
	220
	221	while (i++ < n)
	222	rep_nop();
	223	}
	224
	225	static int __init
	226	es7000_mip_write(struct mip_reg *mip_reg)
	227	{
	228	int status = 0;
	229	int spin;
	230
	231	spin = MIP_SPIN;
	232	while (((unsigned long long)host_reg->off_38 &
	233	(unsigned long long)MIP_VALID) != 0) {
	234	if (--spin <= 0) {
	235	printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
	236	return -1;
	237	}
	238	es7000_spin(MIP_SPIN);
	239	}
	240
	241	memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
	242	outb(1, mip_port);
	243
	244	spin = MIP_SPIN;
	245
	246	while (((unsigned long long)mip_reg->off_38 &
	247	(unsigned long long)MIP_VALID) == 0) {
	248	if (--spin <= 0) {
	249	printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
	250	return -1;
	251	}
	252	es7000_spin(MIP_SPIN);
	253	}
	254
	255	status = ((unsigned long long)mip_reg->off_0 &
	256	(unsigned long long)0xffff0000000000ULL) >> 48;
	257	mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
	258	(unsigned long long)~MIP_VALID);
	259	return status;
	260	}
	261
	262	int
	263	es7000_start_cpu(int cpu, unsigned long eip)
	264	{
	265	unsigned long vect = 0, psaival = 0;
	266
	267	if (psai == NULL)
	268	return -1;
	269
	270	vect = ((unsigned long)__pa(eip)/0x1000) << 16;
	271	psaival = (0x1000000 \| vect \| cpu);
	272
	273	while (*psai & 0x1000000)
	274	;
	275
	276	*psai = psaival;
277
278	return 0;
279
280	}
281
282	int
283	es7000_stop_cpu(int cpu)
284	{
285	int startup;
286
287	if (psai == NULL)
288	return -1;
289
290	startup= (0x1000000 \| cpu);
291
292	while ((*psai & 0xff00ffff) != startup)
293	;
294
295	startup = (*psai & 0xff0000) >> 16;
296	*psai &= 0xffffff;
297
298	return 0;
299
300	}
301
302	void __init
303	es7000_sw_apic()
304	{
305	if (es7000_plat) {
306	int mip_status;
307	struct mip_reg es7000_mip_reg;
308
309	printk("ES7000: Enabling APIC mode.\n");
310	memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
311	es7000_mip_reg.off_0 = MIP_SW_APIC;
312	es7000_mip_reg.off_38 = (MIP_VALID);
313	while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
314	printk("es7000_sw_apic: command failed, status = %x\n",
315	mip_status);
316	return;
317	}
318	}