/* * 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/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++; } }