| //++ | |
| // Copyright (c) 2006, Intel Corporation | |
| // All rights reserved. This program and the accompanying materials | |
| // are licensed and made available under the terms and conditions of the BSD License | |
| // which accompanies this distribution. The full text of the license may be found at | |
| // http://opensource.org/licenses/bsd-license.php | |
| // | |
| // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| // | |
| // Module Name: | |
| // | |
| // IpfCpuCache.s | |
| // | |
| // Abstract: | |
| // | |
| // Contains Misc assembly procedures to support IPF CPU AP. | |
| // | |
| // Revision History: | |
| // | |
| //-- | |
| .file "IpfCpuCache.s" | |
| #include "IpfMacro.i" | |
| #include "IpfDefines.h" | |
| //----------------------------------------------------------------------------- | |
| //++ | |
| // Flush Cache | |
| // | |
| // Arguments : | |
| // Input = in0 = Starting Address to Flush. | |
| // Input = in1 = Length in bytes. | |
| // Input = b0 = return branch register. | |
| // On Entry : | |
| // | |
| // Return Value: | |
| // | |
| // VOID | |
| // SalFlushCache ( | |
| // IN UINT64 BaseToFlush, | |
| // IN UINT64 LengthToFlush | |
| // ); | |
| // | |
| //-- | |
| //--------------------------------------------------------------------------- | |
| PROCEDURE_ENTRY (SalFlushCache) | |
| NESTED_SETUP (5,8,0,0) | |
| mov loc2 = ar.lc | |
| mov loc3 = in0 // Start address. | |
| mov loc4 = in1;; // Length in bytes. | |
| cmp.eq p6,p7 = loc4, r0;; // If Length is zero then don't flush any cache | |
| (p6) br.spnt.many DoneFlushingC;; | |
| add loc4 = loc4,loc3 | |
| mov loc5 = 1;; | |
| sub loc4 = loc4, loc5 ;; // the End address to flush | |
| dep loc3 = r0,loc3,0,5 | |
| dep loc4 = r0,loc4,0,5;; | |
| shr loc3 = loc3,5 | |
| shr loc4 = loc4,5;; // 32 byte cache line | |
| sub loc4 = loc4,loc3;; // total flush count, It should be add 1 but | |
| // the br.cloop will first execute one time | |
| mov loc3 = in0 | |
| mov loc5 = 32 | |
| mov ar.lc = loc4;; | |
| StillFlushingC: | |
| fc loc3;; | |
| sync.i;; | |
| srlz.i;; | |
| add loc3 = loc5,loc3;; | |
| br.cloop.sptk.few StillFlushingC;; | |
| DoneFlushingC: | |
| mov ar.lc = loc2 | |
| NESTED_RETURN | |
| PROCEDURE_EXIT (SalFlushCache) | |