diff options
| -rw-r--r-- | arch/s390/kernel/als.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/s390/kernel/als.c b/arch/s390/kernel/als.c index 0eff858c2434..a16e9d1bf9e3 100644 --- a/arch/s390/kernel/als.c +++ b/arch/s390/kernel/als.c @@ -44,10 +44,58 @@ static void __init print_machine_type(void) _sclp_print_early(mach_str); } +static void __init u16_to_decimal(char *str, u16 val) +{ + int div = 1; + + while (div * 10 <= val) + div *= 10; + while (div) { + *str++ = '0' + val / div; + val %= div; + div /= 10; + } + *str = '\0'; +} + +static void __init print_missing_facilities(void) +{ + static char als_str[80] __initdata = "Missing facilities: "; + unsigned long val; + char val_str[6]; + int i, j, first; + + first = 1; + for (i = 0; i < ARRAY_SIZE(als); i++) { + val = ~S390_lowcore.stfle_fac_list[i] & als[i]; + for (j = 0; j < BITS_PER_LONG; j++) { + if (!(val & (1UL << (BITS_PER_LONG - 1 - j)))) + continue; + if (!first) + strcat(als_str, ","); + /* + * Make sure we stay within one line. Consider that + * each facility bit adds up to five characters and + * z/VM adds a four character prefix. + */ + if (strlen(als_str) > 70) { + _sclp_print_early(als_str); + *als_str = '\0'; + } + u16_to_decimal(val_str, i * BITS_PER_LONG + j); + strcat(als_str, val_str); + first = 0; + } + } + _sclp_print_early(als_str); + _sclp_print_early("See Principles of Operations for facility bits"); +} + static void __init facility_mismatch(void) { _sclp_print_early("The Linux kernel requires more recent processor hardware"); print_machine_type(); + print_missing_facilities(); disabled_wait(0x8badcccc); } |