2 * Dump R4x00 TLB for debugging purposes.
4 * Copyright (C) 1994, 1995 by Waldorf Electronics, written by Ralf Baechle.
5 * Copyright (C) 1999 by Silicon Graphics, Inc.
7 #include <linux/kernel.h>
10 #include <asm/mipsregs.h>
12 #include <asm/pgtable.h>
14 static inline const char *msk2str(unsigned int mask
)
17 case PM_4K
: return "4kb";
18 case PM_16K
: return "16kb";
19 case PM_64K
: return "64kb";
20 case PM_256K
: return "256kb";
21 #ifndef CONFIG_CPU_VR41XX
22 case PM_1M
: return "1Mb";
23 case PM_4M
: return "4Mb";
24 case PM_16M
: return "16Mb";
25 case PM_64M
: return "64Mb";
26 case PM_256M
: return "256Mb";
33 __asm__ __volatile__( \
34 ".set\tnoreorder\n\t" \
35 "nop;nop;nop;nop;nop;nop;nop\n\t" \
38 static void dump_tlb(int first
, int last
)
40 unsigned long s_entryhi
, entryhi
, asid
;
41 unsigned long long entrylo0
, entrylo1
;
42 unsigned int s_index
, pagemask
, c0
, c1
, i
;
44 s_entryhi
= read_c0_entryhi();
45 s_index
= read_c0_index();
46 asid
= s_entryhi
& 0xff;
48 for (i
= first
; i
<= last
; i
++) {
53 pagemask
= read_c0_pagemask();
54 entryhi
= read_c0_entryhi();
55 entrylo0
= read_c0_entrylo0();
56 entrylo1
= read_c0_entrylo1();
58 /* Unused entries have a virtual address of CKSEG0. */
59 if ((entryhi
& ~0x1ffffUL
) != CKSEG0
60 && (entryhi
& 0xff) == asid
) {
67 * Only print entries in use
69 printk("Index: %2d pgmask=%s ", i
, msk2str(pagemask
));
71 c0
= (entrylo0
>> 3) & 7;
72 c1
= (entrylo1
>> 3) & 7;
74 printk("va=%0*lx asid=%02lx\n",
75 width
, (entryhi
& ~0x1fffUL
),
77 printk("\t[pa=%0*llx c=%d d=%d v=%d g=%d] ",
79 (entrylo0
<< 6) & PAGE_MASK
, c0
,
80 (entrylo0
& 4) ? 1 : 0,
81 (entrylo0
& 2) ? 1 : 0,
82 (entrylo0
& 1) ? 1 : 0);
83 printk("[pa=%0*llx c=%d d=%d v=%d g=%d]\n",
85 (entrylo1
<< 6) & PAGE_MASK
, c1
,
86 (entrylo1
& 4) ? 1 : 0,
87 (entrylo1
& 2) ? 1 : 0,
88 (entrylo1
& 1) ? 1 : 0);
93 write_c0_entryhi(s_entryhi
);
94 write_c0_index(s_index
);
97 void dump_tlb_all(void)
99 dump_tlb(0, current_cpu_data
.tlbsize
- 1);
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