Topic       : TOS - The Operating System
Author      : 
Version     : tos.hyp (December 19, 2008)
Subject     : Programmieren/Atari
Nodes       : 3010
Index Size  : 93790
HCP-Version : 5
Compiled on : Atari
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View Ref-File4.18.2  CacheCtrl                                                  TOS

 Name:         »CacheCtrl« - CPU cache management

 Opcode:       160

 Syntax:       int32_t CacheCtrl( int16_t OpCode, int16_t Param );

 Description:  The XBIOS routine CacheCtrl serves for the management 
               of the CPU cache.

                OpCode  Description 
                  0     Return 0 to check that function is implemented 
                  1     Flush data cache 
                  2     Flush instruction cache 
                  3     Flush data and instruction cache 
                  4     Inquire data cache mode 
                  5     Activation/deactivation of the data cache 
                        Param= 0, switch off 
                        Param= 1, switch on 
                        Write-back of the caches if necessary 
                  6     Inquire instruction cache mode 
                  7     Activation/deactivation of the command cache 
                        Param= 0, switch off 
                        Param= 1, switch on 
                        Write-back of the caches if necessary 

               Note:
               Under the CT60 XBIOS, OpCode 5/7 has the same effect :
               Param: 0 = disable all caches.
                      1 = enable all caches.
               All caches are: Data cache, store buffer, branch cache, 
               instruction cache.

 Return value: If successful the function returns the value 0, or 
               EBADRQ when a value larger than seven is passed for 
               OpCode.

               As an alternative the driver "CPU Cache Control Driver 
               v1.10" by Robert Federle and Thomas Tempelmann is 
               available for other computers.

 Availability: The function ist available on the Milan from TOS 4.06, 
               in CT60 XBIOS as of Version v0.98a.

 Group:        Special commands

 See Also:     Binding