// 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>

static int show_cpuinfo(struct seq_file *m, void *v)
{
        unsigned long n = (unsigned long) v - 1;
        unsigned int isa = cpu_data[n].isa_level;
        unsigned int prid = cpu_data[n].processor_id;
        unsigned int version = cpu_data[n].processor_id & 0xff;
        unsigned int fp_version = cpu_data[n].fpu_vers;
        u64 freq = cpu_clock_freq, bogomips = lpj_fine * cpu_clock_freq;

#ifdef CONFIG_SMP
        if (!cpu_online(n))
                return 0;
#endif
        do_div(freq, 10000);
        do_div(bogomips, const_clock_freq * (5000/HZ));

        /*
         * 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, "global_id\t\t: %d\n", cpu_data[n].global_id);
        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, "PRID\t\t\t: %s (%08x)\n", id_to_core_name(prid), prid);
        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: %u.%02u\n", (u32)freq / 100, (u32)freq % 100);
        seq_printf(m, "BogoMIPS\t\t: %u.%02u\n", (u32)bogomips / 100, (u32)bogomips % 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_puts(m, "ISA\t\t\t:");
        if (isa & LOONGARCH_CPU_ISA_LA32R)
                seq_puts(m, " loongarch32r");
        if (isa & LOONGARCH_CPU_ISA_LA32S)
                seq_puts(m, " loongarch32s");
        if (isa & LOONGARCH_CPU_ISA_LA64)
                seq_puts(m, " loongarch64");
        seq_puts(m, "\n");

        seq_puts(m, "Features\t\t:");
        if (cpu_has_cpucfg)
                seq_puts(m, " cpucfg");
        if (cpu_has_lam)
                seq_puts(m, " lam");
        if (cpu_has_scq)
                seq_puts(m, " scq");
        if (cpu_has_ual)
                seq_puts(m, " ual");
        if (cpu_has_fpu)
                seq_puts(m, " fpu");
        if (cpu_has_lsx)
                seq_puts(m, " lsx");
        if (cpu_has_lasx)
                seq_puts(m, " lasx");
        if (cpu_has_crc32)
                seq_puts(m, " crc32");
        if (cpu_has_complex)
                seq_puts(m, " complex");
        if (cpu_has_crypto)
                seq_puts(m, " crypto");
        if (cpu_has_ptw)
                seq_puts(m, " ptw");
        if (cpu_has_lspw)
                seq_puts(m, " lspw");
        if (cpu_has_lvz)
                seq_puts(m, " lvz");
        if (cpu_has_lbt_x86)
                seq_puts(m, " lbt_x86");
        if (cpu_has_lbt_arm)
                seq_puts(m, " lbt_arm");
        if (cpu_has_lbt_mips)
                seq_puts(m, " lbt_mips");
        seq_puts(m, "\n");

        seq_printf(m, "Hardware Watchpoint\t: %s", str_yes_no(cpu_has_watch));
        if (cpu_has_watch) {
                seq_printf(m, ", iwatch count: %d, dwatch count: %d",
                      cpu_data[n].watch_ireg_count, cpu_data[n].watch_dreg_count);
        }

        seq_puts(m, "\n\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,
};