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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/loongarch/kernel/proc.c
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// SPDX-License-Identifier: GPL-2.0

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/*

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 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited

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 */

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#include <linux/delay.h>

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#include <linux/kernel.h>

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#include <linux/sched.h>

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#include <linux/seq_file.h>

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#include <asm/bootinfo.h>

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#include <asm/cpu.h>

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#include <asm/cpu-features.h>

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#include <asm/idle.h>

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#include <asm/processor.h>

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#include <asm/time.h>

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static int show_cpuinfo(struct seq_file *m, void *v)

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{

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	unsigned long n = (unsigned long) v - 1;

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	unsigned int isa = cpu_data[n].isa_level;

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	unsigned int prid = cpu_data[n].processor_id;

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	unsigned int version = cpu_data[n].processor_id & 0xff;

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	unsigned int fp_version = cpu_data[n].fpu_vers;

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	u64 freq = cpu_clock_freq, bogomips = lpj_fine * cpu_clock_freq;

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#ifdef CONFIG_SMP

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	if (!cpu_online(n))

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		return 0;

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#endif

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	do_div(freq, 10000);

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	do_div(bogomips, const_clock_freq * (5000/HZ));

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	/*

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	 * For the first processor also print the system type

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	 */

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	if (n == 0)

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		seq_printf(m, "system type\t\t: %s\n\n", get_system_type());

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	seq_printf(m, "processor\t\t: %ld\n", n);

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	seq_printf(m, "package\t\t\t: %d\n", cpu_data[n].package);

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	seq_printf(m, "core\t\t\t: %d\n", cpu_data[n].core);

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	seq_printf(m, "global_id\t\t: %d\n", cpu_data[n].global_id);

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	seq_printf(m, "CPU Family\t\t: %s\n", __cpu_family[n]);

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	seq_printf(m, "Model Name\t\t: %s\n", __cpu_full_name[n]);

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	seq_printf(m, "PRID\t\t\t: %s (%08x)\n", id_to_core_name(prid), prid);

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	seq_printf(m, "CPU Revision\t\t: 0x%02x\n", version);

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	seq_printf(m, "FPU Revision\t\t: 0x%02x\n", fp_version);

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	seq_printf(m, "CPU MHz\t\t\t: %u.%02u\n", (u32)freq / 100, (u32)freq % 100);

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	seq_printf(m, "BogoMIPS\t\t: %u.%02u\n", (u32)bogomips / 100, (u32)bogomips % 100);

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	seq_printf(m, "TLB Entries\t\t: %d\n", cpu_data[n].tlbsize);

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	seq_printf(m, "Address Sizes\t\t: %d bits physical, %d bits virtual\n",

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		      cpu_pabits + 1, cpu_vabits + 1);

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	seq_printf(m, "ISA\t\t\t:");

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	if (isa & LOONGARCH_CPU_ISA_LA32R)

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		seq_printf(m, " loongarch32r");

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	if (isa & LOONGARCH_CPU_ISA_LA32S)

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		seq_printf(m, " loongarch32s");

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	if (isa & LOONGARCH_CPU_ISA_LA64)

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		seq_printf(m, " loongarch64");

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	seq_printf(m, "\n");

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	seq_printf(m, "Features\t\t:");

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	if (cpu_has_cpucfg)	seq_printf(m, " cpucfg");

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	if (cpu_has_lam)	seq_printf(m, " lam");

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	if (cpu_has_ual)	seq_printf(m, " ual");

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	if (cpu_has_fpu)	seq_printf(m, " fpu");

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	if (cpu_has_lsx)	seq_printf(m, " lsx");

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	if (cpu_has_lasx)	seq_printf(m, " lasx");

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	if (cpu_has_crc32)	seq_printf(m, " crc32");

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	if (cpu_has_complex)	seq_printf(m, " complex");

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	if (cpu_has_crypto)	seq_printf(m, " crypto");

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	if (cpu_has_ptw)	seq_printf(m, " ptw");

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	if (cpu_has_lspw)	seq_printf(m, " lspw");

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	if (cpu_has_lvz)	seq_printf(m, " lvz");

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	if (cpu_has_lbt_x86)	seq_printf(m, " lbt_x86");

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	if (cpu_has_lbt_arm)	seq_printf(m, " lbt_arm");

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	if (cpu_has_lbt_mips)	seq_printf(m, " lbt_mips");

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	seq_printf(m, "\n");

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	seq_printf(m, "Hardware Watchpoint\t: %s", str_yes_no(cpu_has_watch));

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	if (cpu_has_watch) {

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		seq_printf(m, ", iwatch count: %d, dwatch count: %d",

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		      cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count);

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	}

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	seq_printf(m, "\n\n");

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	return 0;

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}

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static void *c_start(struct seq_file *m, loff_t *pos)

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{

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	unsigned long i = *pos;

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	return i < nr_cpu_ids ? (void *)(i + 1) : NULL;

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}

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static void *c_next(struct seq_file *m, void *v, loff_t *pos)

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{

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	++*pos;

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	return c_start(m, pos);

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}

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static void c_stop(struct seq_file *m, void *v)

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{

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}

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const struct seq_operations cpuinfo_op = {

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	.start	= c_start,

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	.next	= c_next,

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	.stop	= c_stop,

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	.show	= show_cpuinfo,

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};

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