sysmem.c

OMAP1030 处理器的ARM 侧硬件测试代码 OMAP1030 是TI的双核处理器

/*****************************************************************************/
/*  sysmem   v2.24  - System memory allocation                              */
/*  Copyright (c) 1996-2002 Texas Instruments Incorporated                   */
/*****************************************************************************/
/*                                                              */
/* This module declares the memory area used by the memory      */
/* allocation functions malloc(), etc.  The size and placement  */
/* of this memory area is done in the linker (using section     */
/* directives and the -heap flag). The default size is 64 bytes.*/
/*                                                              */
/* NOTE 1:This mechanism works in cooperation with "memory.c"   */
/*        and the linker.  If an alternate (custom) memory      */
/*        allocation scheme is used this file may need to be    */
/*        modified or discarded.                                */
/*                                                              */
/* NOTE 2:This file will only be linked in if any of the memory */
/*        allocation functions are used in the program! (or if  */
/*        you reference __sys_memory for some reason)           */
/*                                                              */
/****************************************************************/
__asm("          .global __SYSMEM_SIZE  ");
__asm("          .global __sys_memory   ");
__asm("          .global __memory_size  ");

/****************************************************************/
/* Define the heap memory area.  Note that 64 is a default size */
/* which is overridden in the linker.  Note also that the heap  */
/* area must be word aligned so that accesses to __sys_memory   */
/* work properly.                                               */
/****************************************************************/
__asm("__sys_memory   .usect  \".sysmem\", 64, 4");

/****************************************************************/
/* GENERATE AN AUTOINITIALIZATION RECORD TO INITIALIZE HEAP.    */
/* This code assumes that "__sys_memory" contains a structure   */
/* of type PACKET (as defined in "memory.c").                   */
/* The purpose of this is to initialize the heap into one (big) */
/* free packet of size "__SYSMEM_SIZE-8".  This is equivalent   */
/* to calling minit() at boot time.                             */
/****************************************************************/
__asm("          .sect   \".cinit\"       ");
__asm("          .align  4                ");
__asm("          .long   8                ");
__asm("          .long   __sys_memory     ");
__asm("          .long   __SYSMEM_SIZE-8  ");
__asm("          .long   0                ");

/****************************************************************/
/*  INITIALIZE THE VARIABLE INDICATING HEAP SIZE                */
/****************************************************************/
__asm("          .long   4                ");
__asm("          .long   __memory_size    ");
__asm("          .long   __SYSMEM_SIZE    ");