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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/mipsregs.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#define mips_tlb_entries 48
void
dump_tlb(int first, int last)
{
int i;
unsigned int pagemask, c0, c1, asid;
unsigned long entryhi, entrylo0, entrylo1;
asid = get_entryhi() & 0xff;
for(i=first;i<=last;i++)
{
write_32bit_cp0_register(CP0_INDEX, i);
__asm__ __volatile__(
".set\tmips3\n\t"
".set\tnoreorder\n\t"
"nop;nop;nop;nop\n\t"
"tlbr\n\t"
"nop;nop;nop;nop\n\t"
".set\treorder\n\t"
".set\tmips0\n\t");
pagemask = read_32bit_cp0_register(CP0_PAGEMASK);
entryhi = read_32bit_cp0_register(CP0_ENTRYHI);
entrylo0 = read_32bit_cp0_register(CP0_ENTRYLO0);
entrylo1 = read_32bit_cp0_register(CP0_ENTRYLO1);
/* Unused entries have a virtual address of KSEG0. */
if ((entryhi & 0xffffe000) != 0x80000000
&& (entryhi & 0xff) == asid) {
/*
* Only print entries in use
*/
printk("Index: %2d pgmask=%08x ", i, pagemask);
c0 = (entrylo0 >> 3) & 7;
c1 = (entrylo1 >> 3) & 7;
printk("va=%08lx asid=%08lx"
" [pa=%06lx c=%d d=%d v=%d g=%ld]"
" [pa=%06lx c=%d d=%d v=%d g=%ld]",
(entryhi & 0xffffe000),
entryhi & 0xff,
entrylo0 & PAGE_MASK, c0,
(entrylo0 & 4) ? 1 : 0,
(entrylo0 & 2) ? 1 : 0,
(entrylo0 & 1),
entrylo1 & PAGE_MASK, c1,
(entrylo1 & 4) ? 1 : 0,
(entrylo1 & 2) ? 1 : 0,
(entrylo1 & 1));
}
}
printk("\n");
set_entryhi(asid);
}
void
dump_tlb_all(void)
{
dump_tlb(0, mips_tlb_entries - 1);
}
void
dump_tlb_wired(void)
{
int wired;
wired = read_32bit_cp0_register(CP0_WIRED);
printk("Wired: %d", wired);
dump_tlb(0, read_32bit_cp0_register(CP0_WIRED));
}
#define BARRIER \
__asm__ __volatile__( \
".set\tnoreorder\n\t" \
"nop;nop;nop;nop;nop;nop;nop\n\t" \
".set\treorder");
void
dump_tlb_addr(unsigned long addr)
{
unsigned int flags, oldpid;
int index;
__save_and_cli(flags);
oldpid = get_entryhi() & 0xff;
BARRIER;
set_entryhi((addr & PAGE_MASK) | oldpid);
BARRIER;
tlb_probe();
BARRIER;
index = get_index();
set_entryhi(oldpid);
__restore_flags(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_32bit_cp0_register(CP0_WIRED), mips_tlb_entries - 1);
}
void
dump_list_process(struct task_struct *t, void *address)
{
pgd_t *page_dir, *pgd;
pmd_t *pmd;
pte_t *pte, page;
unsigned int addr;
unsigned long val;
addr = (unsigned int) address;
printk("Addr == %08x\n", addr);
printk("tasks->mm.pgd == %08x\n", (unsigned int) t->mm->pgd);
page_dir = pgd_offset(t->mm, 0);
printk("page_dir == %08x\n", (unsigned int) page_dir);
pgd = pgd_offset(t->mm, addr);
printk("pgd == %08x, ", (unsigned int) pgd);
pmd = pmd_offset(pgd, addr);
printk("pmd == %08x, ", (unsigned int) pmd);
pte = pte_offset(pmd, addr);
printk("pte == %08x, ", (unsigned int) pte);
page = *pte;
printk("page == %08x\n", (unsigned int) 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;
pmd_t *pmd;
pte_t *pte;
unsigned int addr, paddr;
addr = (unsigned long) address;
pgd = pgd_offset(current->mm, addr);
pmd = pmd_offset(pgd, addr);
pte = pte_offset(pmd, addr);
paddr = (KSEG1 | (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, (unsigned long)*p++);
printk("*%08lx == %08lx\n",
(unsigned long)p, (unsigned long)*p++);
}
}
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