tlb1.c
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#include <ultra64.h>
#include <R4300.h>
#include <os_internal.h>
#include "cpu.h"
#define MAX_PAGESIZE (64*1024)
#define MAX_PAGESHIFT 16
#define MIN_PAGESHIFT 12
static char testBuffer[4*MAX_PAGESIZE];
/*
* tlb1
*
* Tests for:
* osMapTLB (asid argument)
* osSetTLBASID
*
* Assumed working:
*
* osUnmapTLB
* osUnmapTLBAll
* osVirtualToPhysical
* osWritebackDCache
* osInvalDCache
*
* Description:
*/
void
printTLB(void)
{
s32 index;
PRINTF("TLB ASID = %d (0x%x)\n", __osGetTLBASID(), __osGetTLBASID());
for (index = 0; index < 1; index++) {
PRINTF("%02d. pagemask 0x%08x hi 0x%08x lo0 0x%08x lo1 0x%08x\n",
index, __osGetTLBPageMask(index), __osGetTLBHi(index),
__osGetTLBLo0(index), __osGetTLBLo1(index));
}
}
int
tlb1(void)
{
int numFailures = 0;
u32 paddr;
u8 *evenVaddr, *oddVaddr;
unsigned int expectedValue, actualValue;
s32 i, j;
/*
XDEBUG(PRINTF("TLB1 test\n"));
*/
paddr = osVirtualToPhysical(buffer);
osUnmapTLBAll();
evenVaddr = (u8 *)(2*4096);
oddVaddr = (u8 *)(3*4096);
/*
* Check that global mappings work regardless of the ASID
*/
for (i = 0; i < 0x100; i++) {
osSetTLBASID(i);
/*
* Map the even and odd pages one physical page apart.
*/
osMapTLB(0, OS_PM_4K, evenVaddr, paddr, paddr + 2 * 4096, -1);
/*
* Verify the even page address.
*/
expectedValue = paddr;
actualValue = osVirtualToPhysical(evenVaddr);
if (expectedValue != actualValue) {
XDEBUG(PRINTF("ERR: expected physical address 0x%x, actual 0x%x\n",
expectedValue, actualValue));
numFailures++;
}
/*
* Verify the odd page address.
*/
expectedValue = paddr + 2 * 4096;
actualValue = osVirtualToPhysical(oddVaddr);
if (expectedValue != actualValue) {
XDEBUG(PRINTF("ERR: expected physical address 0x%x, actual 0x%x\n",
expectedValue, actualValue));
numFailures++;
}
osUnmapTLB(0);
}
/*
* Check that non-global mappings work only when the correct ASID is set.
*/
for (i = 0; i < 0x100; i++) {
/*
* Map the even and odd pages one physical page apart.
*/
osMapTLB(0, OS_PM_4K, evenVaddr, paddr, paddr + 2 * 4096, i);
for (j = 0; j < 0x100; j++) {
osSetTLBASID(j);
/*
* Map, unmap another TLB entry here to test if ASID gets modified
*/
osMapTLB(1, OS_PM_4K, evenVaddr+(2*4096),
paddr, paddr + 2 * 4096, i);
osUnmapTLB(1);
if (i == j) {
/*
* Verify the even page address.
*/
expectedValue = paddr;
actualValue = osVirtualToPhysical(evenVaddr);
if (expectedValue != actualValue) {
XDEBUG(PRINTF(
"ERR: expected physical address 0x%x, actual 0x%x\n",
expectedValue, actualValue));
numFailures++;
printTLB();
}
/*
* Verify the odd page address.
*/
expectedValue = paddr + 2 * 4096;
actualValue = osVirtualToPhysical(oddVaddr);
if (expectedValue != actualValue) {
XDEBUG(PRINTF(
"ERR: expected physical address 0x%x, actual 0x%x\n",
expectedValue, actualValue));
numFailures++;
printTLB();
}
} else {
/*
* Verify the even page address is not mapped.
*/
expectedValue = (u32)-1;
actualValue = osVirtualToPhysical(evenVaddr);
if (expectedValue != actualValue) {
XDEBUG(PRINTF(
"ERR: expected return value 0x%x, actual 0x%x\n",
expectedValue, actualValue));
numFailures++;
printTLB();
}
/*
* Verify the odd page address is not mapped.
*/
expectedValue = (u32)-1;
actualValue = osVirtualToPhysical(oddVaddr);
if (expectedValue != actualValue) {
XDEBUG(PRINTF(
"ERR: expected return value 0x%x, actual 0x%x\n",
expectedValue, actualValue));
numFailures++;
printTLB();
}
}
}
osUnmapTLB(0);
}
/*
XDEBUG(PRINTF("******** Test DONE with %d errors ********\n",
numFailures));
*/
return(numFailures);
}