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// SPDX-License-Identifier: GPL-2.0
/*
* 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/mmu_context.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/tlbdebug.h>
extern int r3k_have_wired_reg;
void dump_tlb_regs(void)
{
pr_info("Index : %0x\n", read_c0_index());
pr_info("EntryHi : %0lx\n", read_c0_entryhi());
pr_info("EntryLo : %0lx\n", read_c0_entrylo0());
if (r3k_have_wired_reg)
pr_info("Wired : %0x\n", read_c0_wired());
}
static void dump_tlb(int first, int last)
{
int i;
unsigned int asid;
unsigned long entryhi, entrylo0, asid_mask;
asid_mask = cpu_asid_mask(¤t_cpu_data);
asid = read_c0_entryhi() & asid_mask;
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 & PAGE_MASK) != KSEG0 &&
(entrylo0 & R3K_ENTRYLO_G ||
(entryhi & asid_mask) == asid)) {
/*
* Only print entries in use
*/
printk("Index: %2d ", i);
pr_cont("va=%08lx asid=%08lx"
" [pa=%06lx n=%d d=%d v=%d g=%d]",
entryhi & PAGE_MASK,
entryhi & asid_mask,
entrylo0 & PAGE_MASK,
(entrylo0 & R3K_ENTRYLO_N) ? 1 : 0,
(entrylo0 & R3K_ENTRYLO_D) ? 1 : 0,
(entrylo0 & R3K_ENTRYLO_V) ? 1 : 0,
(entrylo0 & R3K_ENTRYLO_G) ? 1 : 0);
}
}
printk("\n");
write_c0_entryhi(asid);
}
void dump_tlb_all(void)
{
dump_tlb(0, current_cpu_data.tlbsize - 1);
}
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