/* * 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/config.h>#include <linux/kernel.h>#include <linux/mm.h>#include <linux/sched.h>#include <linux/string.h>#include <asm/bootinfo.h>#include <asm/cpu.h>#include <asm/cachectl.h>#include <asm/mipsregs.h>#include <asm/page.h>#include <asm/pgtable.h>static inline const char *msg2str(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	}}void dump_tlb(int first, int last){	int	i;	unsigned int pagemask, c0, c1, asid;	unsigned long long entrylo0, entrylo1;	unsigned long entryhi;	asid = get_entryhi() & 0xff;	printk("\n");	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 = get_entrylo0();		entrylo1 = get_entrylo1();		/* Unused entries have a virtual address in KSEG0.  */		if ((entryhi & 0xf0000000) != 0x80000000		    && (entryhi & 0xff) == asid) {			/*			 * Only print entries in use			 */			printk("Index: %2d pgmask=%s ", i, msg2str(pagemask));			c0 = (entrylo0 >> 3) & 7;			c1 = (entrylo1 >> 3) & 7;			printk("va=%08lx asid=%02lx\n",			       (entryhi & 0xffffe000), (entryhi & 0xff));			printk("\t\t\t[pa=%08Lx c=%d d=%d v=%d g=%Ld]\n",			       (entrylo0 << 6) & PAGE_MASK, c0,			       (entrylo0 & 4) ? 1 : 0,			       (entrylo0 & 2) ? 1 : 0,			       (entrylo0 & 1));			printk("\t\t\t[pa=%08Lx 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");		}	}	set_entryhi(asid);}void dump_tlb_all(void){	dump_tlb(0, mips_cpu.tlbsize - 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");voiddump_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);}voiddump_tlb_nonwired(void){	dump_tlb(read_32bit_cp0_register(CP0_WIRED), mips_cpu.tlbsize - 1);}voiddump_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("task                 == %08p\n", t);	printk("task->mm             == %08p\n", t->mm);	//printk("tasks->mm.pgd        == %08x\n", (unsigned int) t->mm->pgd);	if (addr > KSEG0)		page_dir = pgd_offset_k(0);	else		page_dir = pgd_offset(t->mm, 0);	printk("page_dir == %08x\n", (unsigned int) page_dir);	if (addr > KSEG0)		pgd = pgd_offset_k(addr);	else		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;#ifdef CONFIG_64BIT_PHYS_ADDR	printk("page == %08Lx\n", (unsigned long long) pte_val(page));#else	printk("page == %08lx\n", (unsigned int) pte_val(page));#endif	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");}voiddump_list_current(void *address){	dump_list_process(current, address);}unsigned intvtop(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;}voiddump16(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++);	}}