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[PATCH] x86: Adds mtrr_save_fixed_ranges() for use in two later patches.

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In this current implementation which is used in other patches,
mtrr_save_fixed_ranges() accepts a dummy void pointer because
in the current implementation of one of these patches, this
function may be called from smp_call_function_single() which
requires that this function takes a void pointer argument.

This function calls get_fixed_ranges(), passing mtrr_state.fixed_ranges
which is the element of the static struct which stores our current
backup of the fixed-range MTRR values which all CPUs shall be
using.

Because  mtrr_save_fixed_ranges calls get_fixed_ranges after
kernel initialisation time, __init needs to be removed from
the declaration of get_fixed_ranges().

If CONFIG_MTRR is not set, we define mtrr_save_fixed_ranges
as an empty statement because there is nothing to do.

AK: Moved prototypes for x86-64 around to fix warnings

Signed-off-by: Bernhard Kaindl <bk@suse.de>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andi Kleen <ak@suse.de>
Cc: Dave Jones <davej@codemonkey.org.uk>
This commit is contained in:
Bernhard Kaindl 2007-05-02 19:27:17 +02:00 committed by Andi Kleen
parent 856f44ff4a
commit 2b3b4835c9
3 changed files with 10 additions and 1 deletions
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7
arch/i386/kernel/cpu/mtrr/generic.c
View file

@ -37,7 +37,7 @@ get_mtrr_var_range(unsigned int index, struct mtrr_var_range *vr)
rdmsr(MTRRphysMask_MSR(index), vr->mask_lo, vr->mask_hi);
}
static void __init
static void
get_fixed_ranges(mtrr_type * frs)
{
unsigned int *p = (unsigned int *) frs;
@ -51,6 +51,11 @@ get_fixed_ranges(mtrr_type * frs)
rdmsr(MTRRfix4K_C0000_MSR + i, p[6 + i * 2], p[7 + i * 2]);
}
void mtrr_save_fixed_ranges(void *info)
{
get_fixed_ranges(mtrr_state.fixed_ranges);
}
static void __init print_fixed(unsigned base, unsigned step, const mtrr_type*types)
{
unsigned i;

2
include/asm-i386/mtrr.h
View file

@ -69,6 +69,7 @@ struct mtrr_gentry
/* The following functions are for use by other drivers */
# ifdef CONFIG_MTRR
extern void mtrr_save_fixed_ranges(void *);
extern int mtrr_add (unsigned long base, unsigned long size,
unsigned int type, char increment);
extern int mtrr_add_page (unsigned long base, unsigned long size,
@ -79,6 +80,7 @@ extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
extern void mtrr_ap_init(void);
extern void mtrr_bp_init(void);
# else
#define mtrr_save_fixed_ranges(arg) do {} while (0)
static __inline__ int mtrr_add (unsigned long base, unsigned long size,
unsigned int type, char increment)
{

2
include/asm-x86_64/mtrr.h
View file

@ -138,9 +138,11 @@ struct mtrr_gentry32
#ifdef CONFIG_MTRR
extern void mtrr_ap_init(void);
extern void mtrr_bp_init(void);
extern void mtrr_save_fixed_ranges(void *);
#else
#define mtrr_ap_init() do {} while (0)
#define mtrr_bp_init() do {} while (0)
#define mtrr_save_fixed_ranges(arg) do {} while (0)
#endif
#endif /* __KERNEL__ */