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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-11-16 18:23:33 +1100
committerPaul Mackerras <paulus@samba.org>2007-12-03 13:56:26 +1100
commit5a8a1a28bb35a62561367c0a1144dbc5dcb95230 (patch)
treea07e4d48faf386e052e02e17483fb2ba40c0813e /arch/powerpc/xmon
parent5f1a7c811bb1aa5259afb8967c704f1306eaacb3 (diff)
downloadlinux-5a8a1a28bb35a62561367c0a1144dbc5dcb95230.tar.bz2
[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>
Diffstat (limited to 'arch/powerpc/xmon')
-rw-r--r--arch/powerpc/xmon/xmon.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 121b04d165d1..381d467cf55b 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -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"
@@ -856,6 +863,11 @@ cmds(struct pt_regs *excp)
dump_segments();
break;
#endif
+#ifdef CONFIG_4xx
+ case 'u':
+ dump_tlb_44x();
+ break;
+#endif
default:
printf("Unrecognized command: ");
do {
@@ -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