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author | Dean Nelson <dcn@sgi.com> | 2005-03-23 19:46:00 -0700 |
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committer | Tony Luck <tony.luck@intel.com> | 2005-05-03 12:16:52 -0700 |
commit | b0d82bd5df874f7dadbeced1b0163473387da37c (patch) | |
tree | c78294ddaff17034ef77253c587a7512ba813e95 /arch/ia64/sn/kernel/xp_nofault.S | |
parent | 7fbd2a5337b2aa91266abbded97330f909904fd5 (diff) | |
download | blackbird-op-linux-b0d82bd5df874f7dadbeced1b0163473387da37c.tar.gz blackbird-op-linux-b0d82bd5df874f7dadbeced1b0163473387da37c.zip |
[IA64-SGI] SGI Altix cross partition functionality (2nd
This patch contains the shim module (XP) which interfaces between the
communication module (XPC) and the functional support modules (like XPNET).
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/sn/kernel/xp_nofault.S')
-rw-r--r-- | arch/ia64/sn/kernel/xp_nofault.S | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/ia64/sn/kernel/xp_nofault.S b/arch/ia64/sn/kernel/xp_nofault.S new file mode 100644 index 000000000000..b772543053c9 --- /dev/null +++ b/arch/ia64/sn/kernel/xp_nofault.S @@ -0,0 +1,31 @@ +/* + * 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) 2004-2005 Silicon Graphics, Inc. All Rights Reserved. + */ + + +/* + * The xp_nofault_PIOR function takes a pointer to a remote PIO register + * and attempts to load and consume a value from it. This function + * will be registered as a nofault code block. In the event that the + * PIO read fails, the MCA handler will force the error to look + * corrected and vector to the xp_error_PIOR which will return an error. + * + * extern int xp_nofault_PIOR(void *remote_register); + */ + + .global xp_nofault_PIOR +xp_nofault_PIOR: + mov r8=r0 // Stage a success return value + ld8.acq r9=[r32];; // PIO Read the specified register + adds r9=1,r9 // Add to force a consume + br.ret.sptk.many b0;; // Return success + + .global xp_error_PIOR +xp_error_PIOR: + mov r8=1 // Return value of 1 + br.ret.sptk.many b0;; // Return failure + |