patch-2.3.48 linux/arch/mips/lib/r3k_dump_tlb.c

• Lines: 186
• Date: Thu Feb 24 22:52:30 2000
• Orig file: v2.3.47/linux/arch/mips/lib/r3k_dump_tlb.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.47/linux/arch/mips/lib/r3k_dump_tlb.c linux/arch/mips/lib/r3k_dump_tlb.c
@@ -0,0 +1,185 @@
+/*
+ * 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/mipsregs.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+
+#define mips_tlb_entries 64
+
+void
+dump_tlb(int first, int last)
+{
+	int	i;
+	unsigned int asid;
+	unsigned long entryhi, entrylo0;
+
+	asid = get_entryhi() & 0xfc0;
+
+	for(i=first;i<=last;i++)
+	{
+		write_32bit_cp0_register(CP0_INDEX, i);
+		__asm__ __volatile__(
+			".set\tnoreorder\n\t"
+			"tlbr\n\t"
+			"nop\n\t"
+			".set\treorder");
+		entryhi  = read_32bit_cp0_register(CP0_ENTRYHI);
+		entrylo0 = read_32bit_cp0_register(CP0_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=%ld]",
+			       (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");
+
+	set_entryhi(asid);
+}
+
+void
+dump_tlb_all(void)
+{
+	dump_tlb(0, mips_tlb_entries - 1);
+}
+
+void
+dump_tlb_wired(void)
+{
+	int	wired = 7;
+
+	printk("Wired: %d", wired);
+	dump_tlb(0, read_32bit_cp0_register(CP0_WIRED));
+}
+
+void
+dump_tlb_addr(unsigned long addr)
+{
+	unsigned int flags, oldpid;
+	int index;
+
+	__save_and_cli(flags);
+	oldpid = get_entryhi() & 0xff;
+	set_entryhi((addr & PAGE_MASK) | oldpid);
+	tlb_probe();
+	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(8, 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_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++);
+	}
+}