/*
* 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;
}
}
