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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2007-06-02 00:21:30 +0900
committerRalf Baechle <ralf@linux-mips.org>2007-07-10 17:32:56 +0100
commit4becef1d85a48ea4294c962c2cbacb6074f0dd58 (patch)
treebeea6b8fa8a861035385e5800ef3b2ed2301f1f2 /arch/mips/lib/r3k_dump_tlb.c
parentf6e2373ad6148476464fc7bb2610c6450c18cd2a (diff)
[MIPS] Unify dump_tlb
Unify lib-{32,64}/dump_tlb.c into lib/dump_tlb.c and move lib-32/r3k_dump_tlb.c to lib directory. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/lib/r3k_dump_tlb.c')
-rw-r--r--arch/mips/lib/r3k_dump_tlb.c182
1 files changed, 182 insertions, 0 deletions
diff --git a/arch/mips/lib/r3k_dump_tlb.c b/arch/mips/lib/r3k_dump_tlb.c
new file mode 100644
index 00000000000..4f2cb74f076
--- /dev/null
+++ b/arch/mips/lib/r3k_dump_tlb.c
@@ -0,0 +1,182 @@
+/*
+ * 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++;
+ }
+}