mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-20 02:34:23 +08:00
x86: Add UV bios call infrastructure v4
Add the EFI callback function and associated wrapper code. Initialize SAL system table entry info at boot time. Signed-off-by: Russ Anderson <rja@sgi.com> Signed-off-by: Paul Jackson <pj@sgi.com> Acked-by: Huang Ying <ying.huang@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Russ Anderson
Ingo Molnar
parent
a50f70b175
commit
7f5942329e
@ -1,8 +1,6 @@
|
||||
/*
|
||||
* BIOS run time interface routines.
|
||||
*
|
||||
* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
|
||||
*
|
||||
* 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
|
||||
@ -16,33 +14,94 @@
|
||||
* 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>
|
||||
|
||||
const char *
|
||||
x86_bios_strerror(long status)
|
||||
struct uv_systab uv_systab;
|
||||
|
||||
s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
|
||||
{
|
||||
const char *str;
|
||||
switch (status) {
|
||||
case 0: str = "Call completed without error"; break;
|
||||
case -1: str = "Not implemented"; break;
|
||||
case -2: str = "Invalid argument"; break;
|
||||
case -3: str = "Call completed with error"; break;
|
||||
default: str = "Unknown BIOS status code"; break;
|
||||
}
|
||||
return str;
|
||||
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
|
||||
x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second,
|
||||
unsigned long *drift_info)
|
||||
x86_bios_freq_base(unsigned long clock_type, unsigned long *ticks_per_second,
|
||||
unsigned long *drift_info)
|
||||
{
|
||||
struct uv_bios_retval isrv;
|
||||
|
||||
BIOS_CALL(isrv, BIOS_FREQ_BASE, which, 0, 0, 0, 0, 0, 0);
|
||||
*ticks_per_second = isrv.v0;
|
||||
*drift_info = isrv.v1;
|
||||
return isrv.status;
|
||||
return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
|
||||
(u64)ticks_per_second, 0, 0, 0);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(x86_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
|
||||
|
||||
|
||||
@ -427,6 +427,7 @@ void __init uv_system_init(void)
|
||||
gnode_upper = (((unsigned long)node_id.s.node_id) &
|
||||
~((1 << n_val) - 1)) << m_val;
|
||||
|
||||
uv_bios_init();
|
||||
uv_rtc_init();
|
||||
|
||||
for_each_present_cpu(cpu) {
|
||||
|
||||
@ -94,4 +94,17 @@ extern void efi_reserve_early(void);
|
||||
extern void efi_call_phys_prelog(void);
|
||||
extern void efi_call_phys_epilog(void);
|
||||
|
||||
#ifndef CONFIG_EFI
|
||||
/*
|
||||
* IF EFI is not configured, have the EFI calls return -ENOSYS.
|
||||
*/
|
||||
#define efi_call0(_f) (-ENOSYS)
|
||||
#define efi_call1(_f, _a1) (-ENOSYS)
|
||||
#define efi_call2(_f, _a1, _a2) (-ENOSYS)
|
||||
#define efi_call3(_f, _a1, _a2, _a3) (-ENOSYS)
|
||||
#define efi_call4(_f, _a1, _a2, _a3, _a4) (-ENOSYS)
|
||||
#define efi_call5(_f, _a1, _a2, _a3, _a4, _a5) (-ENOSYS)
|
||||
#define efi_call6(_f, _a1, _a2, _a3, _a4, _a5, _a6) (-ENOSYS)
|
||||
#endif /* CONFIG_EFI */
|
||||
|
||||
#endif /* ASM_X86__EFI_H */
|
||||
|
||||
@ -2,9 +2,7 @@
|
||||
#define ASM_X86__UV__BIOS_H
|
||||
|
||||
/*
|
||||
* BIOS layer definitions.
|
||||
*
|
||||
* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
|
||||
* UV BIOS layer definitions.
|
||||
*
|
||||
* 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
|
||||
@ -19,11 +17,43 @@
|
||||
* 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/rtc.h>
|
||||
|
||||
#define BIOS_FREQ_BASE 0x01000001
|
||||
/*
|
||||
* Values for the BIOS calls. It is passed as the first * argument in the
|
||||
* BIOS call. Passing any other value in the first argument will result
|
||||
* in a BIOS_STATUS_UNIMPLEMENTED return status.
|
||||
*/
|
||||
enum uv_bios_cmd {
|
||||
UV_BIOS_COMMON,
|
||||
UV_BIOS_GET_SN_INFO,
|
||||
UV_BIOS_FREQ_BASE
|
||||
};
|
||||
|
||||
/*
|
||||
* Status values returned from a BIOS call.
|
||||
*/
|
||||
enum {
|
||||
BIOS_STATUS_SUCCESS = 0,
|
||||
BIOS_STATUS_UNIMPLEMENTED = -ENOSYS,
|
||||
BIOS_STATUS_EINVAL = -EINVAL,
|
||||
BIOS_STATUS_UNAVAIL = -EBUSY
|
||||
};
|
||||
|
||||
/*
|
||||
* The UV system table describes specific firmware
|
||||
* capabilities available to the Linux kernel at runtime.
|
||||
*/
|
||||
struct uv_systab {
|
||||
char signature[4]; /* must be "UVST" */
|
||||
u32 revision; /* distinguish different firmware revs */
|
||||
u64 function; /* BIOS runtime callback function ptr */
|
||||
};
|
||||
|
||||
enum {
|
||||
BIOS_FREQ_BASE_PLATFORM = 0,
|
||||
@ -31,38 +61,17 @@ enum {
|
||||
BIOS_FREQ_BASE_REALTIME_CLOCK = 2
|
||||
};
|
||||
|
||||
# define BIOS_CALL(result, a0, a1, a2, a3, a4, a5, a6, a7) \
|
||||
do { \
|
||||
/* XXX - the real call goes here */ \
|
||||
result.status = BIOS_STATUS_UNIMPLEMENTED; \
|
||||
isrv.v0 = 0; \
|
||||
isrv.v1 = 0; \
|
||||
} while (0)
|
||||
/*
|
||||
* bios calls have 6 parameters
|
||||
*/
|
||||
extern s64 uv_bios_call(enum uv_bios_cmd, u64, u64, u64, u64, u64);
|
||||
extern s64 uv_bios_call_irqsave(enum uv_bios_cmd, u64, u64, u64, u64, u64);
|
||||
extern s64 uv_bios_call_reentrant(enum uv_bios_cmd, u64, u64, u64, u64, u64);
|
||||
|
||||
enum {
|
||||
BIOS_STATUS_SUCCESS = 0,
|
||||
BIOS_STATUS_UNIMPLEMENTED = -1,
|
||||
BIOS_STATUS_EINVAL = -2,
|
||||
BIOS_STATUS_ERROR = -3
|
||||
};
|
||||
|
||||
struct uv_bios_retval {
|
||||
/*
|
||||
* A zero status value indicates call completed without error.
|
||||
* A negative status value indicates reason of call failure.
|
||||
* A positive status value indicates success but an
|
||||
* informational value should be printed (e.g., "reboot for
|
||||
* change to take effect").
|
||||
*/
|
||||
s64 status;
|
||||
u64 v0;
|
||||
u64 v1;
|
||||
u64 v2;
|
||||
};
|
||||
extern void uv_bios_init(void);
|
||||
|
||||
extern long
|
||||
x86_bios_freq_base(unsigned long which, unsigned long *ticks_per_second,
|
||||
unsigned long *drift_info);
|
||||
extern const char *x86_bios_strerror(long status);
|
||||
|
||||
#endif /* ASM_X86__UV__BIOS_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user