diff options
Diffstat (limited to 'arch/loongarch/kernel/proc.c')
| -rw-r--r-- | arch/loongarch/kernel/proc.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/arch/loongarch/kernel/proc.c b/arch/loongarch/kernel/proc.c new file mode 100644 index 000000000000..5c67cc4fd56d --- /dev/null +++ b/arch/loongarch/kernel/proc.c @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited + */ +#include <linux/delay.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/seq_file.h> +#include <asm/bootinfo.h> +#include <asm/cpu.h> +#include <asm/cpu-features.h> +#include <asm/idle.h> +#include <asm/processor.h> +#include <asm/time.h> + +/* + * No lock; only written during early bootup by CPU 0. + */ +static RAW_NOTIFIER_HEAD(proc_cpuinfo_chain); + +int __ref register_proc_cpuinfo_notifier(struct notifier_block *nb) +{ + return raw_notifier_chain_register(&proc_cpuinfo_chain, nb); +} + +int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v) +{ + return raw_notifier_call_chain(&proc_cpuinfo_chain, val, v); +} + +static int show_cpuinfo(struct seq_file *m, void *v) +{ + unsigned long n = (unsigned long) v - 1; + unsigned int version = cpu_data[n].processor_id & 0xff; + unsigned int fp_version = cpu_data[n].fpu_vers; + struct proc_cpuinfo_notifier_args proc_cpuinfo_notifier_args; + +#ifdef CONFIG_SMP + if (!cpu_online(n)) + return 0; +#endif + + /* + * For the first processor also print the system type + */ + if (n == 0) + seq_printf(m, "system type\t\t: %s\n\n", get_system_type()); + + seq_printf(m, "processor\t\t: %ld\n", n); + seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package); + seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core); + seq_printf(m, "CPU Family\t\t: %s\n", __cpu_family[n]); + seq_printf(m, "Model Name\t\t: %s\n", __cpu_full_name[n]); + seq_printf(m, "CPU Revision\t\t: 0x%02x\n", version); + seq_printf(m, "FPU Revision\t\t: 0x%02x\n", fp_version); + seq_printf(m, "CPU MHz\t\t\t: %llu.%02llu\n", + cpu_clock_freq / 1000000, (cpu_clock_freq / 10000) % 100); + seq_printf(m, "BogoMIPS\t\t: %llu.%02llu\n", + (lpj_fine * cpu_clock_freq / const_clock_freq) / (500000/HZ), + ((lpj_fine * cpu_clock_freq / const_clock_freq) / (5000/HZ)) % 100); + seq_printf(m, "TLB Entries\t\t: %d\n", cpu_data[n].tlbsize); + seq_printf(m, "Address Sizes\t\t: %d bits physical, %d bits virtual\n", + cpu_pabits + 1, cpu_vabits + 1); + + seq_printf(m, "ISA\t\t\t:"); + if (cpu_has_loongarch32) + seq_printf(m, " loongarch32"); + if (cpu_has_loongarch64) + seq_printf(m, " loongarch64"); + seq_printf(m, "\n"); + + seq_printf(m, "Features\t\t:"); + if (cpu_has_cpucfg) seq_printf(m, " cpucfg"); + if (cpu_has_lam) seq_printf(m, " lam"); + if (cpu_has_ual) seq_printf(m, " ual"); + if (cpu_has_fpu) seq_printf(m, " fpu"); + if (cpu_has_lsx) seq_printf(m, " lsx"); + if (cpu_has_lasx) seq_printf(m, " lasx"); + if (cpu_has_complex) seq_printf(m, " complex"); + if (cpu_has_crypto) seq_printf(m, " crypto"); + if (cpu_has_lvz) seq_printf(m, " lvz"); + if (cpu_has_lbt_x86) seq_printf(m, " lbt_x86"); + if (cpu_has_lbt_arm) seq_printf(m, " lbt_arm"); + if (cpu_has_lbt_mips) seq_printf(m, " lbt_mips"); + seq_printf(m, "\n"); + + seq_printf(m, "Hardware Watchpoint\t: %s", + cpu_has_watch ? "yes, " : "no\n"); + if (cpu_has_watch) { + seq_printf(m, "iwatch count: %d, dwatch count: %d\n", + cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count); + } + + proc_cpuinfo_notifier_args.m = m; + proc_cpuinfo_notifier_args.n = n; + + raw_notifier_call_chain(&proc_cpuinfo_chain, 0, + &proc_cpuinfo_notifier_args); + + seq_printf(m, "\n"); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + unsigned long i = *pos; + + return i < nr_cpu_ids ? (void *)(i + 1) : NULL; +} + +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + ++*pos; + return c_start(m, pos); +} + +static void c_stop(struct seq_file *m, void *v) +{ +} + +const struct seq_operations cpuinfo_op = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = show_cpuinfo, +}; |