| /* |
| * 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 |
| |
