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xtensa: print hardware config ID on startup

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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>
This commit is contained in:
Max Filippov 2017-08-08 14:06:14 -07:00
parent f4431396be
commit aa6476f76c
1 changed files with 9 additions and 0 deletions
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9
arch/xtensa/kernel/setup.c
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@ -317,6 +317,13 @@ static inline int mem_reserve(unsigned long start, unsigned long end)
void __init setup_arch(char **cmdline_p) 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; *cmdline_p = command_line;
platform_setup(cmdline_p); platform_setup(cmdline_p);
strlcpy(boot_command_line, *cmdline_p, COMMAND_LINE_SIZE); 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" "model\t\t: Xtensa " XCHAL_HW_VERSION_NAME "\n"
"core ID\t\t: " XCHAL_CORE_ID "\n" "core ID\t\t: " XCHAL_CORE_ID "\n"
"build ID\t: 0x%x\n" "build ID\t: 0x%x\n"
"config ID\t: %08x:%08x\n"
"byte order\t: %s\n" "byte order\t: %s\n"
"cpu MHz\t\t: %lu.%02lu\n" "cpu MHz\t\t: %lu.%02lu\n"
"bogomips\t: %lu.%02lu\n", "bogomips\t: %lu.%02lu\n",
num_online_cpus(), num_online_cpus(),
cpumask_pr_args(cpu_online_mask), cpumask_pr_args(cpu_online_mask),
XCHAL_BUILD_UNIQUE_ID, XCHAL_BUILD_UNIQUE_ID,
get_sr(SREG_EPC), get_sr(SREG_EXCSAVE),
XCHAL_HAVE_BE ? "big" : "little", XCHAL_HAVE_BE ? "big" : "little",
ccount_freq/1000000, ccount_freq/1000000,
(ccount_freq/10000) % 100, (ccount_freq/10000) % 100,