[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>hifive-unleashed-5.1
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5f1a7c811b
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5a8a1a28bb
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@ -153,6 +153,10 @@ static const char *getvecname(unsigned long vec);
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static int do_spu_cmd(void);
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static int do_spu_cmd(void);
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#ifdef CONFIG_44x
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static void dump_tlb_44x(void);
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#endif
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int xmon_no_auto_backtrace;
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int xmon_no_auto_backtrace;
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extern void xmon_enter(void);
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extern void xmon_enter(void);
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@ -231,6 +235,9 @@ Commands:\n\
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#ifdef CONFIG_PPC_STD_MMU_32
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#ifdef CONFIG_PPC_STD_MMU_32
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" u dump segment registers\n"
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" u dump segment registers\n"
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#endif
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#endif
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#ifdef CONFIG_44x
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" u dump TLB\n"
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#endif
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" ? help\n"
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" ? help\n"
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" zr reboot\n\
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" zr reboot\n\
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zh halt\n"
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zh halt\n"
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@ -855,6 +862,11 @@ cmds(struct pt_regs *excp)
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case 'u':
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case 'u':
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dump_segments();
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dump_segments();
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break;
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break;
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#endif
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#ifdef CONFIG_4xx
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case 'u':
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dump_tlb_44x();
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break;
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#endif
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#endif
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default:
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default:
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printf("Unrecognized command: ");
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printf("Unrecognized command: ");
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@ -2581,6 +2593,32 @@ void dump_segments(void)
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}
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}
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#endif
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#endif
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#ifdef CONFIG_44x
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static void dump_tlb_44x(void)
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{
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int i;
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for (i = 0; i < PPC44x_TLB_SIZE; i++) {
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unsigned long w0,w1,w2;
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asm volatile("tlbre %0,%1,0" : "=r" (w0) : "r" (i));
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asm volatile("tlbre %0,%1,1" : "=r" (w1) : "r" (i));
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asm volatile("tlbre %0,%1,2" : "=r" (w2) : "r" (i));
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printf("[%02x] %08x %08x %08x ", i, w0, w1, w2);
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if (w0 & PPC44x_TLB_VALID) {
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printf("V %08x -> %01x%08x %c%c%c%c%c",
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w0 & PPC44x_TLB_EPN_MASK,
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w1 & PPC44x_TLB_ERPN_MASK,
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w1 & PPC44x_TLB_RPN_MASK,
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(w2 & PPC44x_TLB_W) ? 'W' : 'w',
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(w2 & PPC44x_TLB_I) ? 'I' : 'i',
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(w2 & PPC44x_TLB_M) ? 'M' : 'm',
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(w2 & PPC44x_TLB_G) ? 'G' : 'g',
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(w2 & PPC44x_TLB_E) ? 'E' : 'e');
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}
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printf("\n");
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}
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}
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#endif /* CONFIG_44x */
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void xmon_init(int enable)
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void xmon_init(int enable)
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{
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{
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#ifdef CONFIG_PPC_ISERIES
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#ifdef CONFIG_PPC_ISERIES
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