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[IA64-SGI] convert AMO address found in XPC's reserved page

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This patch detects the existence of an uncached physical AMO address setup
by EFI's XPBOOT (SGI) and converts it to an uncached virtual AMO address.
Depends on a patch submitted on 23 March 2005 with the subject of:
    [PATCH 2/3] SGI Altix cross partition functionality (2nd revision)

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Dean Nelson 2005-04-04 13:14:00 -07:00 committed by Tony Luck
parent a2d974da0a
commit 3a7d555bfc
2 changed files with 22 additions and 1 deletions
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15
arch/ia64/sn/kernel/xpc_partition.c
View file

@ -204,6 +204,19 @@ xpc_rsvd_page_init(void)
return NULL;
}
}
} else if (!IS_AMO_ADDRESS((u64) amos_page)) {
/*
* EFI's XPBOOT can also set amos_page in the reserved page,
* but it happens to leave it as an uncached physical address
* and we need it to be an uncached virtual, so we'll have to
* convert it.
*/
if (!IS_AMO_PHYS_ADDRESS((u64) amos_page)) {
dev_err(xpc_part, "previously used amos_page address "
"is bad = 0x%p\n", (void *) amos_page);
return NULL;
}
amos_page = (AMO_t *) TO_AMO((u64) amos_page);
}
memset(xpc_vars, 0, sizeof(struct xpc_vars));
@ -944,7 +957,7 @@ xpc_discovery(void)
/*
* Given a partid, get the nasids owned by that partition from the
* remote partitions reserved page.
* remote partition's reserved page.
*/
enum xpc_retval
xpc_initiate_partid_to_nasids(partid_t partid, void *nasid_mask)

8
include/asm-ia64/sn/addrs.h
View file

@ -136,6 +136,7 @@
*/
#define CAC_BASE (CACHED | AS_CAC_SPACE)
#define AMO_BASE (UNCACHED | AS_AMO_SPACE)
#define AMO_PHYS_BASE (UNCACHED_PHYS | AS_AMO_SPACE)
#define GET_BASE (CACHED | AS_GET_SPACE)
/*
@ -160,6 +161,13 @@
#define PHYS_TO_DMA(x) ( (((u64)(x) & NASID_MASK) >> 2) | NODE_OFFSET(x))
/*
* Macros to test for address type.
*/
#define IS_AMO_ADDRESS(x) (((u64)(x) & (REGION_BITS | AS_MASK)) == AMO_BASE)
#define IS_AMO_PHYS_ADDRESS(x) (((u64)(x) & (REGION_BITS | AS_MASK)) == AMO_PHYS_BASE)
/*
* The following definitions pertain to the IO special address
* space. They define the location of the big and little windows