Commit 5a8a1a28 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Paul Mackerras
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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: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 5f1a7c81

arch/powerpc/xmon/xmon.c

+38 −0
Original line number Diff line number Diff line
@@ -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