xtensa: print hardware config ID on startup

Print hardware config ID on startup and config ID recorded in the
configuration if it doesn't match one read from the hardware.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 253a0178f1bdd85435dc5547c7ed0fdc58e0b046..3732c91b7200223452b49d0e18694dac3f42177d 100644 (file)
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -317,6 +317,13 @@ static inline int mem_reserve(unsigned long start, unsigned long end)
 
 void __init setup_arch(char **cmdline_p)
 {
+       pr_info("config ID: %08x:%08x\n",
+               get_sr(SREG_EPC), get_sr(SREG_EXCSAVE));
+       if (get_sr(SREG_EPC) != XCHAL_HW_CONFIGID0 ||
+           get_sr(SREG_EXCSAVE) != XCHAL_HW_CONFIGID1)
+               pr_info("built for config ID: %08x:%08x\n",
+                       XCHAL_HW_CONFIGID0, XCHAL_HW_CONFIGID1);
+
        *cmdline_p = command_line;
        platform_setup(cmdline_p);
        strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE);
@@ -582,12 +589,14 @@ c_show(struct seq_file *f, void *slot)
                      "model\t\t: Xtensa " XCHAL_HW_VERSION_NAME "\n"
                      "core ID\t\t: " XCHAL_CORE_ID "\n"
                      "build ID\t: 0x%x\n"
+                     "config ID\t: %08x:%08x\n"
                      "byte order\t: %s\n"
                      "cpu MHz\t\t: %lu.%02lu\n"
                      "bogomips\t: %lu.%02lu\n",
                      num_online_cpus(),
                      cpumask_pr_args(cpu_online_mask),
                      XCHAL_BUILD_UNIQUE_ID,
+                     get_sr(SREG_EPC), get_sr(SREG_EXCSAVE),
                      XCHAL_HAVE_BE ?  "big" : "little",
                      ccount_freq/1000000,
                      (ccount_freq/10000) % 100,