forked from luck/tmp_suning_uos_patched
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
/*
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (c) 2001-2004 Silicon Graphics, Inc. All rights reserved.
|
|
*/
|
|
|
|
#ifndef _ASM_IA64_SN_FETCHOP_H
|
|
#define _ASM_IA64_SN_FETCHOP_H
|
|
|
|
#include <linux/config.h>
|
|
|
|
#define FETCHOP_BASENAME "sgi_fetchop"
|
|
#define FETCHOP_FULLNAME "/dev/sgi_fetchop"
|
|
|
|
|
|
|
|
#define FETCHOP_VAR_SIZE 64 /* 64 byte per fetchop variable */
|
|
|
|
#define FETCHOP_LOAD 0
|
|
#define FETCHOP_INCREMENT 8
|
|
#define FETCHOP_DECREMENT 16
|
|
#define FETCHOP_CLEAR 24
|
|
|
|
#define FETCHOP_STORE 0
|
|
#define FETCHOP_AND 24
|
|
#define FETCHOP_OR 32
|
|
|
|
#define FETCHOP_CLEAR_CACHE 56
|
|
|
|
#define FETCHOP_LOAD_OP(addr, op) ( \
|
|
*(volatile long *)((char*) (addr) + (op)))
|
|
|
|
#define FETCHOP_STORE_OP(addr, op, x) ( \
|
|
*(volatile long *)((char*) (addr) + (op)) = (long) (x))
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* Convert a region 6 (kaddr) address to the address of the fetchop variable
|
|
*/
|
|
#define FETCHOP_KADDR_TO_MSPEC_ADDR(kaddr) TO_MSPEC(kaddr)
|
|
|
|
|
|
/*
|
|
* Each Atomic Memory Operation (AMO formerly known as fetchop)
|
|
* variable is 64 bytes long. The first 8 bytes are used. The
|
|
* remaining 56 bytes are unaddressable due to the operation taking
|
|
* that portion of the address.
|
|
*
|
|
* NOTE: The AMO_t _MUST_ be placed in either the first or second half
|
|
* of the cache line. The cache line _MUST NOT_ be used for anything
|
|
* other than additional AMO_t entries. This is because there are two
|
|
* addresses which reference the same physical cache line. One will
|
|
* be a cached entry with the memory type bits all set. This address
|
|
* may be loaded into processor cache. The AMO_t will be referenced
|
|
* uncached via the memory special memory type. If any portion of the
|
|
* cached cache-line is modified, when that line is flushed, it will
|
|
* overwrite the uncached value in physical memory and lead to
|
|
* inconsistency.
|
|
*/
|
|
typedef struct {
|
|
u64 variable;
|
|
u64 unused[7];
|
|
} AMO_t;
|
|
|
|
|
|
/*
|
|
* The following APIs are externalized to the kernel to allocate/free pages of
|
|
* fetchop variables.
|
|
* fetchop_kalloc_page - Allocate/initialize 1 fetchop page on the
|
|
* specified cnode.
|
|
* fetchop_kfree_page - Free a previously allocated fetchop page
|
|
*/
|
|
|
|
unsigned long fetchop_kalloc_page(int nid);
|
|
void fetchop_kfree_page(unsigned long maddr);
|
|
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _ASM_IA64_SN_FETCHOP_H */
|
|
|