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x86: Add UV bios call infrastructure v4

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Add the EFI callback function and associated wrapper code.
Initialize SAL system table entry info at boot time.

Signed-off-by: Russ Anderson <[email protected]>
Signed-off-by: Paul Jackson <[email protected]>
Acked-by: Huang Ying <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Russ Anderson 2008-10-03 11:59:15 -05:00 • committed by Ingo Molnar
commit 7f5942329e
4 changed files with 135 additions and 53 deletions
Download patch file Download diff file Expand all files Collapse all files

13
include/asm-x86/efi.h
View file

@ -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 */

73
include/asm-x86/uv/bios.h
View file

@ -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 */