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/*
* BIOS run time interface routines.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
* Copyright (c) Russ Anderson
*/
#include <linux/efi.h>
#include <asm/efi.h>
#include <linux/io.h>
#include <asm/uv/bios.h>
#include <asm/uv/uv_hub.h>
struct uv_systab uv_systab;
s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
{
struct uv_systab *tab = &uv_systab;
if (!tab->function)
/*
* BIOS does not support UV systab
*/
return BIOS_STATUS_UNIMPLEMENTED;
return efi_call6((void *)__va(tab->function),
(u64)which, a1, a2, a3, a4, a5);
}
s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
u64 a4, u64 a5)
{
unsigned long bios_flags;
s64 ret;
local_irq_save(bios_flags);
ret = uv_bios_call(which, a1, a2, a3, a4, a5);
local_irq_restore(bios_flags);
return ret;
}
s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
u64 a4, u64 a5)
{
s64 ret;
preempt_disable();
ret = uv_bios_call(which, a1, a2, a3, a4, a5);
preempt_enable();
return ret;
}
long sn_partition_id;
EXPORT_SYMBOL_GPL(sn_partition_id);
long sn_coherency_id;
EXPORT_SYMBOL_GPL(sn_coherency_id);
long sn_region_size;
EXPORT_SYMBOL_GPL(sn_region_size);
int uv_type;
s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
long *region)
{
s64 ret;
u64 v0, v1;
union partition_info_u part;
ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
(u64)(&v0), (u64)(&v1), 0, 0);
if (ret != BIOS_STATUS_SUCCESS)
return ret;
part.val = v0;
if (uvtype)
*uvtype = part.hub_version;
if (partid)
*partid = part.partition_id;
if (coher)
*coher = part.coherence_id;
if (region)
*region = part.region_size;
return ret;
}
s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
{
return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
(u64)ticks_per_second, 0, 0, 0);
}
EXPORT_SYMBOL_GPL(uv_bios_freq_base);
#ifdef CONFIG_EFI
void uv_bios_init(void)
{
struct uv_systab *tab;
if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
(efi.uv_systab == (unsigned long)NULL)) {
printk(KERN_CRIT "No EFI UV System Table.\n");
uv_systab.function = (unsigned long)NULL;
return;
}
tab = (struct uv_systab *)ioremap(efi.uv_systab,
sizeof(struct uv_systab));
if (strncmp(tab->signature, "UVST", 4) != 0)
printk(KERN_ERR "bad signature in UV system table!");
/*
* Copy table to permanent spot for later use.
*/
memcpy(&uv_systab, tab, sizeof(struct uv_systab));
iounmap(tab);
printk(KERN_INFO "EFI UV System Table Revision %d\n", tab->revision);
}
#else /* !CONFIG_EFI */
void uv_bios_init(void) { }
#endif
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