peripheral_test_memory.c

很多仪器都输出同步时钟

#include "peripheral_test.h"
#include "excalibur.h"

// Prototypes

void DoMemoryTest(void);
void DoRapidPeripheralWrites(void);
void DoRapidRAMWrites(void);
int test(char *memLow, char *memHigh, int start);

// Meat

void DoMemoryMenu(void)
	{
	char c;
menu:
	MenuBegin("MEMORY MENU");
	MenuEntry('a',"MemoryTest");
	MenuEntry('b',"Rapid RAM Writes");
	MenuEntry('c',"Rapid Peripheral Writes");

	c = MenuEnd('a','c');

	switch(c)
		{
		MenuCase('a',DoMemoryTest);
		MenuCase('b',DoRapidRAMWrites);
		MenuCase('c',DoRapidPeripheralWrites);
		}
	
	if(c != 'q')
		goto menu;
	}

void DoRapidRAMWrites(void)
	{
	long i;

	printf("About to perform 10 million \"ST [%%g0],%%g1\" instructions...\n\n");

	for(i = 0; i < 10000; i++)
		Do1000STs();
#if 0
		{
		asm("

		PFX	%hi(0x60000)
		MOVI	%g4,%lo(0x60000)
		PFX	%xhi(0x60000)
		MOVI	%g4,%xlo(0x60000)
		LD	%g5,[%g4]		; ensure we're not actually changing memory

		;
		; Use macros to include 100 ST's.
		;

		.macro ST10 r1,r2
		ST	[%r1],%r2
		ST	[%r1],%r2
		ST	[%r1],%r2
		ST	[%r1],%r2
		ST	[%r1],%r2
		ST	[%r1],%r2
		ST	[%r1],%r2
		ST	[%r1],%r2
		ST	[%r1],%r2
		ST	[%r1],%r2
		.endm

		ST10 %g4,%g5
		ST10 %g4,%g5
		ST10 %g4,%g5
		ST10 %g4,%g5
		ST10 %g4,%g5
		ST10 %g4,%g5
		ST10 %g4,%g5
		ST10 %g4,%g5
		ST10 %g4,%g5
		ST10 %g4,%g5
		");
		} // for 10000
#endif

	printf("Did 10,000,000 ST's.\n");
	}



#define wrap 1025	// doesn't divide into power of 2, so address lines get flexed.

void DoMemoryTest(void)
	{
	char *memLow;
	char *memHigh;
	int start;
	int result;

	memLow = (char *)(sbrk(0) + 1000);
	memHigh = ((char *)&start) - 1000;

	printf("-----------------------------\n");
	printf("Testing memory 0x%x - 0x%x\n",memLow,memHigh);
	printf("-----------------------------\n");

	for(start = 0; start < 256; start++)
		{
		if(rGetChar() == 27)
			{
			printf("Memory test aborted.\n");
			return;
			}

		nr_pio_showhex(start);

		printf("test %3d of 256... ",start);
		result = test(memLow,memHigh,start);
		printf("%s\n",result ? "passed" : "failed");
		}
	
	printf("Memory test done.\n");
	}

int test(char *memLow, char *memHigh, int start)
	{
	int x;

	char *memP;


	// fill

	x = start;
	for(memP = memLow; memP < memHigh; memP++)
		{
		*memP = (char) x;
		x ++;
		if(x >= wrap)
			x = 0;
		}

	// test

	x = start;
	for(memP = memLow; memP < memHigh; memP++)
		{
		if(*memP != (char) x)
			return 0;		// fail
		
		x ++;
		if(x >= wrap)
			x = 0;
		}
	
	// pass

	return 1;
	}