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/*
* 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 <linux/sched.h>
#include <linux/string.h>
#include <asm/bootinfo.h>
#include <asm/cachectl.h>
#include <asm/cpu.h>
#include <asm/mipsregs.h>
#include <asm/page.h>
#include <asm/pgtable.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";
#endif
}
return "unknown";
}
#define BARRIER() \
__asm__ __volatile__( \
".set\tnoreorder\n\t" \
"nop;nop;nop;nop;nop;nop;nop\n\t" \
".set\treorder");
void dump_tlb(int first, int last)
{
unsigned long s_entryhi, entryhi, entrylo0, entrylo1, asid;
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) {
/*
* Only print entries in use
*/
printk("Index: %2d pgmask=%s ", i, msk2str(pagemask));
c0 = (entrylo0 >> 3) & 7;
c1 = (entrylo1 >> 3) & 7;
printk("va=%011lx asid=%02lx\n",
(entryhi & ~0x1fffUL),
entryhi & 0xff);
printk("\t[pa=%011lx c=%d d=%d v=%d g=%ld] ",
(entrylo0 << 6) & PAGE_MASK, c0,
(entrylo0 & 4) ? 1 : 0,
(entrylo0 & 2) ? 1 : 0,
(entrylo0 & 1));
printk("[pa=%011lx c=%d d=%d v=%d g=%ld]\n",
(entrylo1 << 6) & PAGE_MASK, c1,
(entrylo1 & 4) ? 1 : 0,
(entrylo1 & 2) ? 1 : 0,
(entrylo1 & 1));
}
}
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);
}
void dump_tlb_wired(void)
{
int wired;
wired = read_c0_wired();
printk("Wired: %d", wired);
dump_tlb(0, read_c0_wired());
}
void dump_tlb_addr(unsigned long addr)
{
unsigned int flags, oldpid;
int index;
local_irq_save(flags);
oldpid = read_c0_entryhi() & 0xff;
BARRIER();
write_c0_entryhi((addr & PAGE_MASK) | oldpid);
BARRIER();
tlb_probe();
BARRIER();
index = read_c0_index();
write_c0_entryhi(oldpid);
local_irq_restore(flags);
if (index < 0) {
printk("No entry for address 0x%08lx in TLB\n", addr);
return;
}
printk("Entry %d maps address 0x%08lx\n", index, addr);
dump_tlb(index, index);
}
void dump_tlb_nonwired(void)
{
dump_tlb(read_c0_wired(), current_cpu_data.tlbsize - 1);
}
void dump_list_process(struct task_struct *t, void *address)
{
pgd_t *page_dir, *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *pte, page;
unsigned long addr, val;
addr = (unsigned long) address;
printk("Addr == %08lx\n", addr);
printk("tasks->mm.pgd == %08lx\n", (unsigned long) t->mm->pgd);
page_dir = pgd_offset(t->mm, 0);
printk("page_dir == %016lx\n", (unsigned long) page_dir);
pgd = pgd_offset(t->mm, addr);
printk("pgd == %016lx\n", (unsigned long) pgd);
pud = pud_offset(pgd, addr);
printk("pud == %016lx\n", (unsigned long) pud);
pmd = pmd_offset(pud, addr);
printk("pmd == %016lx\n", (unsigned long) pmd);
pte = pte_offset(pmd, addr);
printk("pte == %016lx\n", (unsigned long) pte);
page = *pte;
printk("page == %08lx\n", pte_val(page));
val = pte_val(page);
if (val & _PAGE_PRESENT) printk("present ");
if (val & _PAGE_READ) printk("read ");
if (val & _PAGE_WRITE) printk("write ");
if (val & _PAGE_ACCESSED) printk("accessed ");
if (val & _PAGE_MODIFIED) printk("modified ");
if (val & _PAGE_R4KBUG) printk("r4kbug ");
if (val & _PAGE_GLOBAL) printk("global ");
if (val & _PAGE_VALID) printk("valid ");
printk("\n");
}
void dump_list_current(void *address)
{
dump_list_process(current, address);
}
unsigned int vtop(void *address)
{
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
unsigned int addr, paddr;
addr = (unsigned long) address;
pgd = pgd_offset(current->mm, addr);
pud = pud_offset(pgd, addr);
pmd = pmd_offset(pud, addr);
pte = pte_offset(pmd, addr);
paddr = (CKSEG1 | (unsigned int) pte_val(*pte)) & PAGE_MASK;
paddr |= (addr & ~PAGE_MASK);
return paddr;
}
void dump16(unsigned long *p)
{
int i;
for (i = 0; i < 8; i++) {
printk("*%08lx == %08lx, ", (unsigned long)p, *p);
p++;
printk("*%08lx == %08lx\n", (unsigned long)p, *p);
p++;
}
}
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