main_tlb.c

Omap5910的Dsp和arm内存共享程序。实现双核的内存共享通信机制。

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#include "DSPMMU.h"
#include <stdio.h>

extern void InitDSPMMU();
extern void MMU_WriteTlbEntry(TLB_ENTRY Entry, short EntryNumber);
extern void MMU_Reset();
extern void MMU_ReleaseReset();
extern void MMU_Enable();
extern void MMU_Disable();
extern short MMU_ReadFaultType();
extern int  MMU_ReadFaultAddress();
extern TLB_ENTRY MMU_ReadTlbEntry(short n);
extern void MMU_DisplayTlbEntry(short n);
extern short MMU_CheckError();


void MMU_Setup();


void main ()
{
	short i=0;
	 
	// Setup two TLB entries
	MMU_Setup();

	// Read back the two TLB Entries
	for(i=0; i<2; i++)
		MMU_DisplayTlbEntry(i);

	// Loop and wait for MMU error 
	while(MMU_CheckError()==0);
}

void MMU_Setup()
{
    TLB_ENTRY entry1, entry2;

    entry1.VirtualAddress  = 0x800000;
    entry1.PhysicalAddress = 0x10000000;
    entry1.AccessPermission = READ_WRITE;
    entry1.Type = SECTION;

    entry2.VirtualAddress  = 0xA00000;
    entry2.PhysicalAddress = 0x20000000;
    entry2.AccessPermission = READ_ONLY;
    entry2.Type = LARGE_PAGE;

	MMU_Reset();
	MMU_ReleaseReset();
	MMU_WriteTlbEntry(entry1, 0);
    MMU_WriteTlbEntry(entry2, 1);
	MMU_Enable();
}