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changeset 3127:b8cb8bedf5e1

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* cdl/hal_cortexm.cdl: New CDL option CYGIMP_HAL_ARCH_ENDIAN * include/cortexm_endian.h: New file * include/cortexm_regs.h: New file [ Bugzilla 1001275 ]
author sergeig
date Wed, 24 Aug 2011 17:30:56 +0000
parents a142ddec4dad
children 654ce0d409ee
files packages/hal/cortexm/arch/current/ChangeLog packages/hal/cortexm/arch/current/cdl/hal_cortexm.cdl packages/hal/cortexm/arch/current/include/cortexm_endian.h packages/hal/cortexm/arch/current/include/cortexm_regs.h
diffstat 4 files changed, 180 insertions(+), 0 deletions(-) [+]
line wrap: on
line diff
--- a/packages/hal/cortexm/arch/current/ChangeLog
+++ b/packages/hal/cortexm/arch/current/ChangeLog
@@ -1,3 +1,10 @@
+2011-08-23  Ilija Kocho  <ilijak@siva.com.mk>
+
+	* cdl/hal_cortexm.cdl: New CDL option CYGIMP_HAL_ARCH_ENDIAN
+	* include/cortexm_endian.h: New file
+	* include/cortexm_regs.h: New file
+	[ Bugzilla 1001275 ]
+
 2011-04-06  Nick Garnett  <nickg@ecoscentric.com>
 
 	* cdl/cortexm.cdl: Remove M1 CPU family from architecture config
--- a/packages/hal/cortexm/arch/current/cdl/hal_cortexm.cdl
+++ b/packages/hal/cortexm/arch/current/cdl/hal_cortexm.cdl
@@ -129,6 +129,20 @@ cdl_package CYGPKG_HAL_CORTEXM {
             Use the Floating Point Unit."
     }
 
+    cdl_option CYGIMP_HAL_ARCH_ENDIAN {
+        display       "Architecture optimized endian functions"
+        flavor        bool
+        default_value 1
+        description   "
+            Cortex-M architecture implements instructions for endian
+            manipulation (byte swapping).  If enabled, this feature
+            can produce shorter and faster code for that."
+
+        define_proc {
+            puts $::cdl_system_header "#define CYGBLD_HAL_ENDIAN_H <cyg/hal/cortexm_endian.h>"
+        }
+    }
+
     cdl_option CYGNUM_HAL_CORTEXM_PRIORITY_MAX {
          display         "Maximum usable priority"
          flavor          data
new file mode 100644
--- /dev/null
+++ b/packages/hal/cortexm/arch/current/include/cortexm_endian.h
@@ -0,0 +1,77 @@
+#ifndef CYGONCE_CORTEXM_ENDIAN_H
+#define CYGONCE_CORTEXM_ENDIAN_H
+//==========================================================================
+//
+//      cortexm_endian.h
+//
+//      Cortex-M architecture endian conversion macros/functions.
+//
+//==========================================================================
+// ####ECOSGPLCOPYRIGHTBEGIN####                                            
+// -------------------------------------------                              
+// This file is part of eCos, the Embedded Configurable Operating System.   
+// Copyright (C) 2011 Free Software Foundation, Inc.                        
+//
+// eCos is free software; you can redistribute it and/or modify it under    
+// the terms of the GNU General Public License as published by the Free     
+// Software Foundation; either version 2 or (at your option) any later      
+// version.                                                                 
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT      
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or    
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
+// for more details.                                                        
+//
+// You should have received a copy of the GNU General Public License        
+// along with eCos; if not, write to the Free Software Foundation, Inc.,    
+// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            
+//
+// As a special exception, if other files instantiate templates or use      
+// macros or inline functions from this file, or you compile this file      
+// and link it with other works to produce a work based on this file,       
+// this file does not by itself cause the resulting work to be covered by   
+// the GNU General Public License. However the source code for this file    
+// must still be made available in accordance with section (3) of the GNU   
+// General Public License v2.                                               
+//
+// This exception does not invalidate any other reasons why a work based    
+// on this file might be covered by the GNU General Public License.         
+// -------------------------------------------                              
+// ####ECOSGPLCOPYRIGHTEND####                                              
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    Ilija Kocho <ilijak@siva.com.mk>
+//               Sergei Gavrikov
+// Date:         2011-08-20
+// Description:  Endian conversion macros/functions optimized for Cortex-M
+// Usage:        #include <cyg/hal/cortexm_endian.h>
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include <cyg/hal/cortexm_regs.h>
+
+//===========================================================================
+// Endian operations optimized for Cortex-M architecture.
+
+static __inline__ cyg_uint32 cyg_hal_swap32(cyg_uint32 original)
+{
+    cyg_uint32 swapped;
+    CYGARC_REV(swapped, original);
+    return swapped;
+}
+
+static __inline__ cyg_uint16 cyg_hal_swap16(cyg_uint16 original)
+{
+    cyg_uint16 swapped;
+    CYGARC_REV16(swapped, original);
+    return swapped;
+}
+
+#define CYG_SWAP32(__val) cyg_hal_swap32(__val)
+#define CYG_SWAP16(__val) cyg_hal_swap16(__val)
+
+//==========================================================================
+#endif //CYGONCE_CORTEXM_ENDIAN_H
new file mode 100644
--- /dev/null
+++ b/packages/hal/cortexm/arch/current/include/cortexm_regs.h
@@ -0,0 +1,82 @@
+#ifndef CYGONCE_CORTEXM_REGS_H
+#define CYGONCE_CORTEXM_REGS_H
+//==========================================================================
+//
+//      cortexm_regs.h
+//
+//      Cortex-M architecture, special machine instruction wrappers
+//
+//==========================================================================
+// ####ECOSGPLCOPYRIGHTBEGIN####                                            
+// -------------------------------------------                              
+// This file is part of eCos, the Embedded Configurable Operating System.   
+// Copyright (C) 2011 Free Software Foundation, Inc.                        
+//
+// eCos is free software; you can redistribute it and/or modify it under    
+// the terms of the GNU General Public License as published by the Free     
+// Software Foundation; either version 2 or (at your option) any later      
+// version.                                                                 
+//
+// eCos is distributed in the hope that it will be useful, but WITHOUT      
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or    
+// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
+// for more details.                                                        
+//
+// You should have received a copy of the GNU General Public License        
+// along with eCos; if not, write to the Free Software Foundation, Inc.,    
+// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            
+//
+// As a special exception, if other files instantiate templates or use      
+// macros or inline functions from this file, or you compile this file      
+// and link it with other works to produce a work based on this file,       
+// this file does not by itself cause the resulting work to be covered by   
+// the GNU General Public License. However the source code for this file    
+// must still be made available in accordance with section (3) of the GNU   
+// General Public License v2.                                               
+//
+// This exception does not invalidate any other reasons why a work based    
+// on this file might be covered by the GNU General Public License.         
+// -------------------------------------------                              
+// ####ECOSGPLCOPYRIGHTEND####                                              
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    Ilija Kocho <ilijak@siva.com.mk>
+//               Sergei Gavrikov
+// Date:         2011-06-18
+// Description:  C wrappers for some special architecture instructions.
+//
+//####DESCRIPTIONEND####
+//
+//=========================================================================
+
+#ifndef __ASSEMBLER__
+
+//---------------------------------------------------------------------------
+// Change processor state instructions
+
+// Disable / enable interrupts
+#define CYGARC_CPSID( _flags_ ) __asm__ volatile ("cpsid " #_flags_ "\n")
+
+// Enable interrupts and fault handlers (clear FAULTMASK)
+#define CYGARC_CPSIE( _flags_ ) __asm__ volatile ("cpsie " #_flags_ "\n")
+
+//---------------------------------------------------------------------------
+// Byte swapping instructions
+
+// Reverse word
+#define CYGARC_REV( _swapped_, _origin_ ) \
+        __asm__ volatile ("rev %0, %1\n" : "=r"(_swapped_) : "r"(_origin_))
+
+// Reverse halfwords
+#define CYGARC_REV16( _swapped_, _origin_ ) \
+        __asm__ volatile ("rev16 %0, %1\n" : "=r"(_swapped_) : "r"(_origin_))
+
+// Reverse signed halfword
+#define CYGARC_REVSH( _swapped_, _origin_ ) \
+        __asm__ volatile ("revsh %0, %1\n" : "=r"(_swapped_) : "r"(_origin_))
+
+#endif // __ASSEMBLER__
+
+//==========================================================================
+#endif // CYGONCE_CORTEXM_REGS_H