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Commit 7f594232 authored by Russ Anderson's avatar Russ Anderson Committed by Ingo Molnar
Browse files

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: default avatarRuss Anderson <rja@sgi.com>
Signed-off-by: default avatarPaul Jackson <pj@sgi.com>
Acked-by: default avatarHuang Ying <ying.huang@intel.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent a50f70b1

arch/x86/kernel/bios_uv.c

+80 −21
Original line number Diff line number Diff line 
/*

 * 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)

{

	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)

{

	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;

	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;

}

	return str;



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,

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

arch/x86/kernel/genx2apic_uv_x.c

+1 −0
Original line number Diff line number Diff line
@@ -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) {

include/asm-x86/efi.h

+13 −0
Original line number Diff line number Diff line
@@ -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 */

include/asm-x86/uv/bios.h

+41 −32
Original line number Diff line number Diff line
@@ -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
@@ -19,50 +17,61 @@ 
 *  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_FREQ_BASE_PLATFORM = 0,

	BIOS_FREQ_BASE_INTERVAL_TIMER = 1,

	BIOS_FREQ_BASE_REALTIME_CLOCK = 2

	BIOS_STATUS_SUCCESS		=  0,

	BIOS_STATUS_UNIMPLEMENTED	= -ENOSYS,

	BIOS_STATUS_EINVAL		= -EINVAL,

	BIOS_STATUS_UNAVAIL		= -EBUSY

};



# 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)

/*

 * 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_STATUS_SUCCESS		=  0,

	BIOS_STATUS_UNIMPLEMENTED	= -1,

	BIOS_STATUS_EINVAL		= -2,

	BIOS_STATUS_ERROR		= -3

	BIOS_FREQ_BASE_PLATFORM = 0,

	BIOS_FREQ_BASE_INTERVAL_TIMER = 1,

	BIOS_FREQ_BASE_REALTIME_CLOCK = 2

};



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").

 * bios calls have 6 parameters

 */

	s64 status;

	u64 v0;

	u64 v1;

	u64 v2;

};

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);



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 */