1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
  4 */
  5#include <linux/delay.h>
  6#include <linux/kernel.h>
  7#include <linux/sched.h>
  8#include <linux/seq_file.h>
  9#include <asm/bootinfo.h>
 10#include <asm/cpu.h>
 11#include <asm/cpu-features.h>
 12#include <asm/idle.h>
 13#include <asm/processor.h>
 14#include <asm/time.h>
 15
 16/*
 17 * No lock; only written during early bootup by CPU 0.
 18 */
 19static RAW_NOTIFIER_HEAD(proc_cpuinfo_chain);
 20
 21int __ref register_proc_cpuinfo_notifier(struct notifier_block *nb)
 22{
 23	return raw_notifier_chain_register(&proc_cpuinfo_chain, nb);
 24}
 25
 26int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v)
 27{
 28	return raw_notifier_call_chain(&proc_cpuinfo_chain, val, v);
 29}
 30
 31static int show_cpuinfo(struct seq_file *m, void *v)
 32{
 33	unsigned long n = (unsigned long) v - 1;
 34	unsigned int version = cpu_data[n].processor_id & 0xff;
 35	unsigned int fp_version = cpu_data[n].fpu_vers;
 36	struct proc_cpuinfo_notifier_args proc_cpuinfo_notifier_args;
 37
 38#ifdef CONFIG_SMP
 39	if (!cpu_online(n))
 40		return 0;
 41#endif
 42
 43	/*
 44	 * For the first processor also print the system type
 45	 */
 46	if (n == 0)
 47		seq_printf(m, "system type\t\t: %s\n\n", get_system_type());
 48
 49	seq_printf(m, "processor\t\t: %ld\n", n);
 50	seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package);
 51	seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core);
 52	seq_printf(m, "global_id\t\t: %d\n", cpu_data[n].global_id);
 53	seq_printf(m, "CPU Family\t\t: %s\n", __cpu_family[n]);
 54	seq_printf(m, "Model Name\t\t: %s\n", __cpu_full_name[n]);
 55	seq_printf(m, "CPU Revision\t\t: 0x%02x\n", version);
 56	seq_printf(m, "FPU Revision\t\t: 0x%02x\n", fp_version);
 57	seq_printf(m, "CPU MHz\t\t\t: %llu.%02llu\n",
 58		      cpu_clock_freq / 1000000, (cpu_clock_freq / 10000) % 100);
 59	seq_printf(m, "BogoMIPS\t\t: %llu.%02llu\n",
 60		      (lpj_fine * cpu_clock_freq / const_clock_freq) / (500000/HZ),
 61		      ((lpj_fine * cpu_clock_freq / const_clock_freq) / (5000/HZ)) % 100);
 62	seq_printf(m, "TLB Entries\t\t: %d\n", cpu_data[n].tlbsize);
 63	seq_printf(m, "Address Sizes\t\t: %d bits physical, %d bits virtual\n",
 64		      cpu_pabits + 1, cpu_vabits + 1);
 65
 66	seq_printf(m, "ISA\t\t\t:");
 67	if (cpu_has_loongarch32)
 68		seq_printf(m, " loongarch32");
 69	if (cpu_has_loongarch64)
 70		seq_printf(m, " loongarch64");
 71	seq_printf(m, "\n");
 72
 73	seq_printf(m, "Features\t\t:");
 74	if (cpu_has_cpucfg)	seq_printf(m, " cpucfg");
 75	if (cpu_has_lam)	seq_printf(m, " lam");
 76	if (cpu_has_ual)	seq_printf(m, " ual");
 77	if (cpu_has_fpu)	seq_printf(m, " fpu");
 78	if (cpu_has_lsx)	seq_printf(m, " lsx");
 79	if (cpu_has_lasx)	seq_printf(m, " lasx");
 80	if (cpu_has_crc32)	seq_printf(m, " crc32");
 81	if (cpu_has_complex)	seq_printf(m, " complex");
 82	if (cpu_has_crypto)	seq_printf(m, " crypto");
 83	if (cpu_has_ptw)	seq_printf(m, " ptw");
 84	if (cpu_has_lvz)	seq_printf(m, " lvz");
 85	if (cpu_has_lbt_x86)	seq_printf(m, " lbt_x86");
 86	if (cpu_has_lbt_arm)	seq_printf(m, " lbt_arm");
 87	if (cpu_has_lbt_mips)	seq_printf(m, " lbt_mips");
 88	seq_printf(m, "\n");
 89
 90	seq_printf(m, "Hardware Watchpoint\t: %s",
 91		      cpu_has_watch ? "yes, " : "no\n");
 92	if (cpu_has_watch) {
 93		seq_printf(m, "iwatch count: %d, dwatch count: %d\n",
 94		      cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count);
 95	}
 96
 97	proc_cpuinfo_notifier_args.m = m;
 98	proc_cpuinfo_notifier_args.n = n;
 99
100	raw_notifier_call_chain(&proc_cpuinfo_chain, 0,
101				&proc_cpuinfo_notifier_args);
102
103	seq_printf(m, "\n");
104
105	return 0;
106}
107
108static void *c_start(struct seq_file *m, loff_t *pos)
109{
110	unsigned long i = *pos;
111
112	return i < nr_cpu_ids ? (void *)(i + 1) : NULL;
113}
114
115static void *c_next(struct seq_file *m, void *v, loff_t *pos)
116{
117	++*pos;
118	return c_start(m, pos);
119}
120
121static void c_stop(struct seq_file *m, void *v)
122{
123}
124
125const struct seq_operations cpuinfo_op = {
126	.start	= c_start,
127	.next	= c_next,
128	.stop	= c_stop,
129	.show	= show_cpuinfo,
130};