[PATCH 1/5] libmm score API
Hesham Moustafa
heshamelmatary at gmail.com
Mon Aug 26 18:20:58 UTC 2013
On Mon, Aug 26, 2013 at 4:54 PM, Gedare Bloom <gedare at rtems.org> wrote:
> On Sun, Aug 25, 2013 at 8:14 PM, Hesham AL-Matary
> <heshamelmatary at gmail.com> wrote:
> > ---
> > cpukit/score/Makefile.am | 2 +
> > cpukit/score/include/rtems/score/mm.h | 52 ++++++++++++++++++++
> > cpukit/score/include/rtems/score/mmimpl.h | 80
> +++++++++++++++++++++++++++++++
> > cpukit/score/preinstall.am | 8 ++++
> > 4 files changed, 142 insertions(+)
> > create mode 100644 cpukit/score/include/rtems/score/mm.h
> > create mode 100644 cpukit/score/include/rtems/score/mmimpl.h
> >
> > diff --git a/cpukit/score/Makefile.am b/cpukit/score/Makefile.am
> > index c9d2d47..b94af80 100644
> > --- a/cpukit/score/Makefile.am
> > +++ b/cpukit/score/Makefile.am
> > @@ -37,6 +37,8 @@ include_rtems_score_HEADERS +=
> include/rtems/score/interr.h
> > include_rtems_score_HEADERS += include/rtems/score/isr.h
> > include_rtems_score_HEADERS += include/rtems/score/isrlevel.h
> > include_rtems_score_HEADERS += include/rtems/score/isrlock.h
> > +include_rtems_score_HEADERS += include/rtems/score/mm.h
> > +include_rtems_score_HEADERS += include/rtems/score/mmimpl.h
> > include_rtems_score_HEADERS += include/rtems/score/freechain.h
> > include_rtems_score_HEADERS += include/rtems/score/object.h
> > include_rtems_score_HEADERS += include/rtems/score/objectimpl.h
> > diff --git a/cpukit/score/include/rtems/score/mm.h
> b/cpukit/score/include/rtems/score/mm.h
> > new file mode 100644
> > index 0000000..43f6fc9
> > --- /dev/null
> > +++ b/cpukit/score/include/rtems/score/mm.h
> > @@ -0,0 +1,52 @@
> > +/**
> > + * @file
> > + *
> > + * @brief Manages use of MPU/MMU units to provide memory management.
> > + */
> > +
> > +/*
> > + * Copyright (c) 2013 Hesham Al-Matary.
> > + * Copyright (c) 2013 Gedare Bloom.
> > + *
> > + * The license and distribution terms for this file may be
> > + * found in the file LICENSE in this distribution or at
> > + * http://www.rtems.com/license/LICENSE.
> > + */
> > +
> > +#ifndef _RTEMS_SCORE_MM_H
> > +#define _RTEMS_SCORE_MM_H
> > +
> > +/* @defgroup SuperCoreMM Memory Management Support
> > + *
> > + * @ingroup Score
> > + */
> > +/**@{*/
> > +
> > +#ifdef __cplusplus
> > +extern "C" {
> > +#endif
> > +
> > +/**
> > + * @brief _Memory_management_Region Flags defs
> > + */
> > +#define RTEMS_MM_REGION_NO_PROTECTION 0x0
> > +#define RTEMS_MM_REGION_PROTECTION_READ_ONLY 0x1
> > +#define RTEMS_MM_REGION_PROTECTION_WRITE 0x2
> > +#define RTEMS_MM_REGION_NO_ACCESS 0x3
> > +//#define RTEMS_MM_REGION_PROTECTION_EXEC 0x4
> > +
> Is there a reason to have "no protection"? Does it make sense to
> define "No access" as 0x0?
>
I just give the option for applying no access attribute. In Sebastian's
realview BSP code, all page tables entries are set to no access at
startup and then re-set entries according to config_table and sections.
Do you think we should remove it ?
>
> > +void _Memory_management_Initialize( void );
> > +
> > +void _Memory_management_Set_attributes(
> > + uintptr_t base,
> > + size_t size,
> > + uint32_t attr
> > +);
> > +
> > +#ifdef __cplusplus
> > +}
> > +#endif
> > +
> > +/**@}*/
> > +
> > +#endif
> > diff --git a/cpukit/score/include/rtems/score/mmimpl.h
> b/cpukit/score/include/rtems/score/mmimpl.h
> > new file mode 100644
> > index 0000000..7eecef0
> > --- /dev/null
> > +++ b/cpukit/score/include/rtems/score/mmimpl.h
> > @@ -0,0 +1,80 @@
> > +/**
> > + * @file
> > + *
> > + * @brief Inlined Routines from the Memory Management Manager
> > + */
> > +
> > +/*
> > + * Copyright (c) 2013 Hesham AL-Matary
> > + * Copyright (c) 2013 Gedare Bloom.
> > + *
> > + * The license and distribution terms for this file may be
> > + * found in the file LICENSE in this distribution or at
> > + * http://www.rtems.com/license/LICENSE.
> > + */
> > +
> > +#ifndef _RTEMS_SCORE_MMIMPL_H
> > +#define _RTEMS_SCORE_MMIMPL_H
> > +
> > +#ifdef RTEMS_SMP
> > +#include <rtems/score/smplock.h>
> > +#endif
> > +
> > +#include <stdint.h>
> > +#include <stdlib.h>
> > +#include <rtems/score/mm.h>
> > +#include <libcpu/mm.h>
> > +
> > +#ifdef __cplusplus
> > +extern "C" {
> > +#endif
> > +
> > +/**
> > + * @addtogroup SuperCoreMM
> > + */
> > +/**@{**/
> > +
> > +#ifdef RTEMS_SMP
> > +SMP_lock_Control mm_lock;
> > +#endif
> > +
> > +/**
> > + * @brief Calls _CPU_Memory_management_Initialize.
> > + */
> > +void _Memory_management_Initialize( void )
> > +{
> > +#ifdef RTEMS_SMP
> > + _SMP_lock_Initialize( &mm_lock );
> > +#endif
> > +
> > + _CPU_Memory_management_Initialize();
> > +}
> > +
> > +/**
> > + * @brief Calls _CPU_Memory_management_Set_attributes.
> > + */
> > +void _Memory_management_Set_attributes(
> > + uintptr_t base,
> > + size_t size,
> > + uint32_t attr
> > +)
> > +{
> > +#ifdef RTEMS_SMP
> > + _SMP_lock_Acquire( &mm_lock );
> > +#endif
> > +
> > + _CPU_Memory_management_Set_attributes(base, size, attr);
> > +
> > +#ifdef RTEMS_SMP
> > + _SMP_lock_Release( &mm_lock );
> > +#endif
> > +}
> > +
> > +/** @}*/
> > +
> > +#ifdef __cplusplus
> > +}
> > +#endif
> > +
> > +#endif
> > +/* end of include file */
> > diff --git a/cpukit/score/preinstall.am b/cpukit/score/preinstall.am
> > index 79a18b5..4b3bfcf 100644
> > --- a/cpukit/score/preinstall.am
> > +++ b/cpukit/score/preinstall.am
> > @@ -131,6 +131,14 @@ $(PROJECT_INCLUDE)/rtems/score/isrlock.h:
> include/rtems/score/isrlock.h $(PROJEC
> > $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/isrlock.h
> > PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/isrlock.h
> >
> > +$(PROJECT_INCLUDE)/rtems/score/mm.h: include/rtems/score/mm.h
> $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
> > + $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/mm.h
> > +PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/mm.h
> > +
> > +$(PROJECT_INCLUDE)/rtems/score/mmimpl.h: include/rtems/score/mmimpl.h
> $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
> > + $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/mmimpl.h
> > +PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/mmimpl.h
> > +
> > $(PROJECT_INCLUDE)/rtems/score/freechain.h:
> include/rtems/score/freechain.h $(PROJECT_INCLUDE)/rtems/score/$(dirstamp)
> > $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/rtems/score/freechain.h
> > PREINSTALL_FILES += $(PROJECT_INCLUDE)/rtems/score/freechain.h
> > --
> > 1.8.3.1
> >
> > _______________________________________________
> > rtems-devel mailing list
> > rtems-devel at rtems.org
> > http://www.rtems.org/mailman/listinfo/rtems-devel
>
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