sys_mem.c

来自「abstract rtos」· C语言 代码 · 共 82 行

#include "syscfg.h"

#ifdef __cplusplus
extern "C"{
#endif 


#include "sys/sys_pub.h"
#include "aos.h"









VOID* sys_mem_alloc( U32 nBytes  )
{
    return (VOID*)malloc( nBytes );
}

VOID sys_mem_free( VOID*ptr )
{
    free( ptr );
}

U32 sys_page_get( VOID**ppvStart, U32 *pulPageNum )
{
    U32 ulCfgSize, ulSartAddr;


    AOS_ASSERT(CONFIG_MEM_SIZE > 2*MEM_PAGE_SIZE );
  
    ulCfgSize = CONFIG_MEM_SIZE;

#ifdef _EIA2000V3
    if( (U32)sysPhysMemTop() > 0x800000 )
    {
        ulCfgSize += 0x800000;
    }
#endif

    #if( CONFIG_BOARD_GMPU == TRUE )

    ulSartAddr = (U32)sysMemTop();
    
    #else

    ulSartAddr = (U32)sys_mem_alloc(ulCfgSize);
    if( (U32)NULL == ulSartAddr )
    {
         *pulPageNum = 0;
         return AOS_FAIL;
    }
    
    #endif
    
    *pulPageNum = ulCfgSize/MEM_PAGE_SIZE;
    
    if( ulSartAddr & (MEM_PAGE_SIZE-1) )
    {
        ulSartAddr >>= MEM_PAGE_ORDER;
        ulSartAddr++;
        ulSartAddr <<= MEM_PAGE_ORDER;
        (*pulPageNum)--;
        (*pulPageNum)--;
    }

	*ppvStart = (VOID*)ulSartAddr;

    return AOS_SUCC;
}



#ifdef __cplusplus
}
#endif