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[POWERPC] Add xmon function to dump 44x TLB 

This adds a function to xmon to dump the content of the 44x processor
TLB with a little bit of decoding (but not much).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2007-11-16 18:23:33 +11:00 committed by Paul Mackerras
parent 5f1a7c811b
commit 5a8a1a28bb
1 changed files with 38 additions and 0 deletions
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38
arch/powerpc/xmon/xmon.c
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@ -153,6 +153,10 @@ static const char *getvecname(unsigned long vec);
static int do_spu_cmd(void);
#ifdef CONFIG_44x
static void dump_tlb_44x(void);
#endif
int xmon_no_auto_backtrace;
extern void xmon_enter(void);
@ -231,6 +235,9 @@ Commands:\n\
#ifdef CONFIG_PPC_STD_MMU_32
" u dump segment registers\n"
#endif
#ifdef CONFIG_44x
" u dump TLB\n"
#endif
" ? help\n"
" zr reboot\n\
zh halt\n"
@ -855,6 +862,11 @@ cmds(struct pt_regs *excp)
case 'u':
dump_segments();
break;
#endif
#ifdef CONFIG_4xx
case 'u':
dump_tlb_44x();
break;
#endif
default:
printf("Unrecognized command: ");
@ -2581,6 +2593,32 @@ void dump_segments(void)
}
#endif
#ifdef CONFIG_44x
static void dump_tlb_44x(void)
{
int i;
for (i = 0; i < PPC44x_TLB_SIZE; i++) {
unsigned long w0,w1,w2;
asm volatile("tlbre %0,%1,0" : "=r" (w0) : "r" (i));
asm volatile("tlbre %0,%1,1" : "=r" (w1) : "r" (i));
asm volatile("tlbre %0,%1,2" : "=r" (w2) : "r" (i));
printf("[%02x] %08x %08x %08x ", i, w0, w1, w2);
if (w0 & PPC44x_TLB_VALID) {
printf("V %08x -> %01x%08x %c%c%c%c%c",
w0 & PPC44x_TLB_EPN_MASK,
w1 & PPC44x_TLB_ERPN_MASK,
w1 & PPC44x_TLB_RPN_MASK,
(w2 & PPC44x_TLB_W) ? 'W' : 'w',
(w2 & PPC44x_TLB_I) ? 'I' : 'i',
(w2 & PPC44x_TLB_M) ? 'M' : 'm',
(w2 & PPC44x_TLB_G) ? 'G' : 'g',
(w2 & PPC44x_TLB_E) ? 'E' : 'e');
}
printf("\n");
}
}
#endif /* CONFIG_44x */
void xmon_init(int enable)
{
#ifdef CONFIG_PPC_ISERIES