diff options
| -rw-r--r-- | arch/ia64/Kconfig | 2 | ||||
| -rw-r--r-- | arch/ia64/sn/kernel/xpc_partition.c | 6 | ||||
| -rw-r--r-- | include/asm-ia64/sn/mspec.h | 59 |
3 files changed, 64 insertions, 3 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 295b5ab..34e603c 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -227,7 +227,7 @@ config IA64_SGI_SN_SIM config IA64_SGI_SN_XP tristate "Support communication between SGI SSIs" - depends on MSPEC + select IA64_UNCACHED_ALLOCATOR help An SGI machine can be divided into multiple Single System Images which act independently of each other and have diff --git a/arch/ia64/sn/kernel/xpc_partition.c b/arch/ia64/sn/kernel/xpc_partition.c index 2c3c4a8..cd7ed73 100644 --- a/arch/ia64/sn/kernel/xpc_partition.c +++ b/arch/ia64/sn/kernel/xpc_partition.c @@ -22,6 +22,7 @@ #include <linux/cache.h> #include <linux/mmzone.h> #include <linux/nodemask.h> +#include <asm/uncached.h> #include <asm/sn/bte.h> #include <asm/sn/intr.h> #include <asm/sn/sn_sal.h> @@ -183,7 +184,7 @@ xpc_rsvd_page_init(void) * memory protections are never restricted. */ if ((amos_page = xpc_vars->amos_page) == NULL) { - amos_page = (AMO_t *) mspec_kalloc_page(0); + amos_page = (AMO_t *) TO_AMO(uncached_alloc_page(0)); if (amos_page == NULL) { dev_err(xpc_part, "can't allocate page of AMOs\n"); return NULL; @@ -200,7 +201,8 @@ xpc_rsvd_page_init(void) if (ret != 0) { dev_err(xpc_part, "can't change memory " "protections\n"); - mspec_kfree_page((unsigned long) amos_page); + uncached_free_page(__IA64_UNCACHED_OFFSET | + TO_PHYS((u64) amos_page)); return NULL; } } diff --git a/include/asm-ia64/sn/mspec.h b/include/asm-ia64/sn/mspec.h new file mode 100644 index 0000000..dbe13c6 --- /dev/null +++ b/include/asm-ia64/sn/mspec.h @@ -0,0 +1,59 @@ +/* + * + * 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_MSPEC_H +#define _ASM_IA64_SN_MSPEC_H + +#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__ + +/* + * 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; + + +#endif /* __KERNEL__ */ + +#endif /* _ASM_IA64_SN_MSPEC_H */ |