103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
/*
|
|
* Dump R4x00 TLB for debugging purposes.
|
|
*
|
|
* Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
|
|
* Copyright (C) 1999 by Silicon Graphics, Inc.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/tlbdebug.h>
|
|
|
|
static inline const char *msk2str(unsigned int mask)
|
|
{
|
|
switch (mask) {
|
|
case PM_4K: return "4kb";
|
|
case PM_16K: return "16kb";
|
|
case PM_64K: return "64kb";
|
|
case PM_256K: return "256kb";
|
|
#ifndef CONFIG_CPU_VR41XX
|
|
case PM_1M: return "1Mb";
|
|
case PM_4M: return "4Mb";
|
|
case PM_16M: return "16Mb";
|
|
case PM_64M: return "64Mb";
|
|
case PM_256M: return "256Mb";
|
|
case PM_1G: return "1Gb";
|
|
#endif
|
|
}
|
|
return "";
|
|
}
|
|
|
|
#define BARRIER() \
|
|
__asm__ __volatile__( \
|
|
".set\tnoreorder\n\t" \
|
|
"nop;nop;nop;nop;nop;nop;nop\n\t" \
|
|
".set\treorder");
|
|
|
|
static void dump_tlb(int first, int last)
|
|
{
|
|
unsigned long s_entryhi, entryhi, asid;
|
|
unsigned long long entrylo0, entrylo1;
|
|
unsigned int s_index, pagemask, c0, c1, i;
|
|
|
|
s_entryhi = read_c0_entryhi();
|
|
s_index = read_c0_index();
|
|
asid = s_entryhi & 0xff;
|
|
|
|
for (i = first; i <= last; i++) {
|
|
write_c0_index(i);
|
|
BARRIER();
|
|
tlb_read();
|
|
BARRIER();
|
|
pagemask = read_c0_pagemask();
|
|
entryhi = read_c0_entryhi();
|
|
entrylo0 = read_c0_entrylo0();
|
|
entrylo1 = read_c0_entrylo1();
|
|
|
|
/* Unused entries have a virtual address of CKSEG0. */
|
|
if ((entryhi & ~0x1ffffUL) != CKSEG0
|
|
&& (entryhi & 0xff) == asid) {
|
|
#ifdef CONFIG_32BIT
|
|
int width = 8;
|
|
#else
|
|
int width = 11;
|
|
#endif
|
|
/*
|
|
* Only print entries in use
|
|
*/
|
|
printk("Index: %2d pgmask=%s ", i, msk2str(pagemask));
|
|
|
|
c0 = (entrylo0 >> 3) & 7;
|
|
c1 = (entrylo1 >> 3) & 7;
|
|
|
|
printk("va=%0*lx asid=%02lx\n",
|
|
width, (entryhi & ~0x1fffUL),
|
|
entryhi & 0xff);
|
|
printk("\t[pa=%0*llx c=%d d=%d v=%d g=%d] ",
|
|
width,
|
|
(entrylo0 << 6) & PAGE_MASK, c0,
|
|
(entrylo0 & 4) ? 1 : 0,
|
|
(entrylo0 & 2) ? 1 : 0,
|
|
(entrylo0 & 1) ? 1 : 0);
|
|
printk("[pa=%0*llx c=%d d=%d v=%d g=%d]\n",
|
|
width,
|
|
(entrylo1 << 6) & PAGE_MASK, c1,
|
|
(entrylo1 & 4) ? 1 : 0,
|
|
(entrylo1 & 2) ? 1 : 0,
|
|
(entrylo1 & 1) ? 1 : 0);
|
|
}
|
|
}
|
|
printk("\n");
|
|
|
|
write_c0_entryhi(s_entryhi);
|
|
write_c0_index(s_index);
|
|
}
|
|
|
|
void dump_tlb_all(void)
|
|
{
|
|
dump_tlb(0, current_cpu_data.tlbsize - 1);
|
|
}
|