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[PATCH] mspec driver build fix 

Fix MSPEC driver to build for non SN2 enabled configs as the driver should
work in cached and uncached modes (no fetchop) on these systems.  In
addition make MSPEC select IA64_UNCACHED_ALLOCATOR, which is required for
it and move it to arch/ia64/Kconfig to avoid warnings on non ia64
architectures running allmodconfig.  Once the Kconfig code is fixed, we can
move it back.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Cc: Fernando Luis Vzquez Cao <fernando@oss.ntt.co.jp>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jes Sorensen 2006-11-10 12:27:49 -08:00 committed by Linus Torvalds
parent d67afe5ed0
commit 1a4b0fc503
4 changed files with 21 additions and 10 deletions
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9
arch/ia64/Kconfig
View File

@ -484,6 +484,15 @@ source "net/Kconfig"
source "drivers/Kconfig"
config MSPEC
tristate "Memory special operations driver"
depends on IA64
select IA64_UNCACHED_ALLOCATOR
help
If you have an ia64 and you want to enable memory special
operations support (formerly known as fetchop), say Y here,
otherwise say N.
source "fs/Kconfig"
source "lib/Kconfig"

8
drivers/char/Kconfig
View File

@ -409,14 +409,6 @@ config SGI_MBCS
If you have an SGI Altix with an attached SABrick
say Y or M here, otherwise say N.
config MSPEC
tristate "Memory special operations driver"
depends on IA64
help
If you have an ia64 and you want to enable memory special
operations support (formerly known as fetchop), say Y here,
otherwise say N.
source "drivers/serial/Kconfig"
config UNIX98_PTYS

8
drivers/char/mspec.c
View File

@ -72,7 +72,11 @@ enum {
MSPEC_UNCACHED
};
#ifdef CONFIG_SGI_SN
static int is_sn2;
#else
#define is_sn2 0
#endif
/*
* One of these structures is allocated when an mspec region is mmaped. The
@ -211,7 +215,7 @@ mspec_nopfn(struct vm_area_struct *vma, unsigned long address)
if (vdata->type == MSPEC_FETCHOP)
paddr = TO_AMO(maddr);
else
paddr = __pa(TO_CAC(maddr));
paddr = maddr & ~__IA64_UNCACHED_OFFSET;
pfn = paddr >> PAGE_SHIFT;
@ -335,6 +339,7 @@ mspec_init(void)
* The fetchop device only works on SN2 hardware, uncached and cached
* memory drivers should both be valid on all ia64 hardware
*/
#ifdef CONFIG_SGI_SN
if (ia64_platform_is("sn2")) {
is_sn2 = 1;
if (is_shub2()) {
@ -363,6 +368,7 @@ mspec_init(void)
goto free_scratch_pages;
}
}
#endif
ret = misc_register(&cached_miscdev);
if (ret) {
printk(KERN_ERR "%s: failed to register device %i\n",

6
include/asm-ia64/sn/addrs.h
View File

@ -136,9 +136,13 @@
*/
#define TO_PHYS(x) (TO_PHYS_MASK & (x))
#define TO_CAC(x) (CAC_BASE | TO_PHYS(x))
#ifdef CONFIG_SGI_SN
#define TO_AMO(x) (AMO_BASE | TO_PHYS(x))
#define TO_GET(x) (GET_BASE | TO_PHYS(x))
#else
#define TO_AMO(x) ({ BUG(); x; })
#define TO_GET(x) ({ BUG(); x; })
#endif
/*
* Covert from processor physical address to II/TIO physical address: