316 lines
7.1 KiB
C
316 lines
7.1 KiB
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 (!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) */
|
|
|
|
/*
|
|
* Parse the OEM Table
|
|
*/
|
|
|
|
int __init
|
|
parse_unisys_oem (char *oemptr, int oem_entries)
|
|
{
|
|
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 <= oem_entries; 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;
|
|
}
|
|
if (i == 6) break;
|
|
tp += size;
|
|
}
|
|
|
|
if (success < 2) {
|
|
es7000_plat = 0;
|
|
} else {
|
|
printk("\nEnabling ES7000 specific features...\n");
|
|
/*
|
|
* Determine the generation of the ES7000 currently running.
|
|
*
|
|
* es7000_plat = 0 if the machine is NOT a Unisys ES7000 box
|
|
* 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 = 2;
|
|
else
|
|
es7000_plat = 1;
|
|
|
|
ioapic_renumber_irq = es7000_rename_gsi;
|
|
}
|
|
return es7000_plat;
|
|
}
|
|
|
|
int __init
|
|
find_unisys_acpi_oem_table(unsigned long *oem_addr, int *length)
|
|
{
|
|
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);
|
|
*length = header->length;
|
|
*oem_addr = (unsigned long) addr;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
Dprintk("ES7000: did not find Unisys ACPI OEM table!\n");
|
|
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;
|
|
}
|
|
}
|