powerpc/xmon: Add option to show uptime information (59d3391e) · Commits · 戴 / test

It might be useful to quickly get the uptime of a running system on xmon, without needing to grab data from memory and doing math on struct addresses. For example, it'd be useful to check for how long after a crash a system is on xmon shell or if some test was started after the first test crashed (and this 2nd test crashed too into xmon). This small patch adds the 'U' command, to accomplish this. Suggested-by:

Murilo Fossa Vicentini <muvic@linux.vnet.ibm.com> Signed-off-by:

Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> [mpe: Display units (seconds), add sync()/__delay() sequence] Signed-off-by:

Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/xmon/xmon.c

+24 −0

Original line number	Diff line number	Diff line
		@@ -278,6 +278,7 @@ Commands:\n\
		#elif defined(CONFIG_44x) \|\| defined(CONFIG_PPC_BOOK3E)
		" u dump TLB\n"
		#endif
		" U show uptime information\n"
		" ? help\n"
		" # n limit output to n lines per page (for dp, dpa, dl)\n"
		" zr reboot\n\
		@@ -905,6 +906,26 @@ static void remove_cpu_bpts(void)
		write_ciabr(0);
		}

		/* Based on uptime_proc_show(). */
		static void
		show_uptime(void)
		{
		struct timespec uptime;

		if (setjmp(bus_error_jmp) == 0) {
		catch_memory_errors = 1;
		sync();

		get_monotonic_boottime(&uptime);
		printf("Uptime: %lu.%.2lu seconds\n", (unsigned long)uptime.tv_sec,
		((unsigned long)uptime.tv_nsec / (NSEC_PER_SEC/100)));

		sync();
		__delay(200); \
		}
		catch_memory_errors = 0;
		}

		static void set_lpp_cmd(void)
		{
		unsigned long lpp;
		@@ -1040,6 +1061,9 @@ cmds(struct pt_regs *excp)
		dump_tlb_book3e();
		break;
		#endif
		case 'U':
		show_uptime();
		break;
		default:
		printf("Unrecognized command: ");
		do {

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