linux/arch/mips/lib/r3k_dump_tlb.c
David Daney 48c4ac976a Revert "MIPS: Allow ASID size to be determined at boot time."
This reverts commit d532f3d267.

The original commit has several problems:

1) Doesn't work with 64-bit kernels.

2) Calls TLBMISS_HANDLER_SETUP() before the code is generated.

3) Calls TLBMISS_HANDLER_SETUP() twice in per_cpu_trap_init() when
   only one call is needed.

[ralf@linux-mips.org: Also revert the bits of the ASID patch which were
hidden in the KVM merge.]

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: "Steven J. Hill" <Steven.Hill@imgtec.com>
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/5242/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2013-05-16 20:35:42 +02:00

64 lines
1.4 KiB
C

/*
* 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 <asm/mipsregs.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/tlbdebug.h>
extern int r3k_have_wired_reg; /* defined in tlb-r3k.c */
static 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);
}