/* * Dump R3000 TLB for debugging purposes. * * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle. * Copyright (C) 1999 by Silicon Graphics, Inc. * Copyright (C) 1999 by Harald Koerfgen */ #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> extern int r3k_have_wired_reg; /* defined in tlb-r3k.c */ void dump_tlb(int first, int last) { int i; unsigned int asid; unsigned long entryhi, entrylo0; asid = read_c0_entryhi() & 0xfc0; for (i = first; i <= last; i++) { write_c0_index(i<<8); __asm__ __volatile__( ".set\tnoreorder\n\t" "tlbr\n\t" "nop\n\t" ".set\treorder"); entryhi = read_c0_entryhi(); entrylo0 = read_c0_entrylo0(); /* Unused entries have a virtual address of KSEG0. */ if ((entryhi & 0xffffe000) != 0x80000000 && (entryhi & 0xfc0) == asid) { /* * Only print entries in use */ printk("Index: %2d ", i); printk("va=%08lx asid=%08lx" " [pa=%06lx n=%d d=%d v=%d g=%d]", (entryhi & 0xffffe000), entryhi & 0xfc0, entrylo0 & PAGE_MASK, (entrylo0 & (1 << 11)) ? 1 : 0, (entrylo0 & (1 << 10)) ? 1 : 0, (entrylo0 & (1 << 9)) ? 1 : 0, (entrylo0 & (1 << 8)) ? 1 : 0); } } printk("\n"); write_c0_entryhi(asid); } void dump_tlb_all(void) { dump_tlb(0, current_cpu_data.tlbsize - 1); } void dump_tlb_wired(void) { int wired = r3k_have_wired_reg ? read_c0_wired() : 8; printk("Wired: %d", wired); dump_tlb(0, wired - 1); } void dump_tlb_addr(unsigned long addr) { unsigned long flags, oldpid; int index; local_irq_save(flags); oldpid = read_c0_entryhi() & 0xff; write_c0_entryhi((addr & PAGE_MASK) | oldpid); tlb_probe(); 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) { int wired = r3k_have_wired_reg ? read_c0_wired() : 8; dump_tlb(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 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); pud = pud_offset(pgd, addr); printk("pud == %08x, ", (unsigned int) pud); pmd = pmd_offset(pud, 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_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 = (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, *p); p++; printk("*%08lx == %08lx\n", (unsigned long)p, *p); p++; } }