source: mainline/kernel/generic/src/console/cmd.c@ 690ad20

/*
 * Copyright (c) 2025 Jiri Svoboda
 * Copyright (c) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup kernel_generic_console
 * @{
 */

/**
 * @file  cmd.c
 * @brief Kernel console command wrappers.
 *
 * This file is meant to contain all wrapper functions for
 * all kconsole commands. The point is in separating
 * kconsole specific wrappers from kconsole-unaware functions
 * from other subsystems.
 */

#include <assert.h>
#include <console/cmd.h>
#include <console/console.h>
#include <console/kconsole.h>
#include <stdio.h>
#include <log.h>
#include <panic.h>
#include <typedefs.h>
#include <adt/list.h>
#include <arch.h>
#include <config.h>
#include <halt.h>
#include <str.h>
#include <macros.h>
#include <cpu.h>
#include <mm/tlb.h>
#include <mm/km.h>
#include <arch/mm/tlb.h>
#include <mm/frame.h>
#include <main/shutdown.h>
#include <main/version.h>
#include <mm/slab.h>
#include <proc/scheduler.h>
#include <proc/thread.h>
#include <proc/task.h>
#include <ipc/ipc.h>
#include <ipc/irq.h>
#include <ipc/event.h>
#include <sysinfo/sysinfo.h>
#include <symtab.h>
#include <errno.h>
#include <stdlib.h>

#ifdef CONFIG_TEST
#include <test.h>
#endif

/* Data and methods for 'help' command. */
static int cmd_help(cmd_arg_t *argv);
static cmd_info_t help_info = {
        .name = "help",
        .description = "List supported commands.",
        .func = cmd_help,
        .argc = 0
};

/* Data and methods for pio_read_8 command */
static int cmd_pio_read_8(cmd_arg_t *argv);
static cmd_arg_t pio_read_8_argv[] = { { .type = ARG_TYPE_INT } };
static cmd_info_t pio_read_8_info = {
        .name = "pio_read_8",
        .description = "pio_read_8 <address> Read 1 byte from memory (or port).",
        .func = cmd_pio_read_8,
        .argc = 1,
        .argv = pio_read_8_argv
};

/* Data and methods for pio_read_16 command */
static int cmd_pio_read_16(cmd_arg_t *argv);
static cmd_arg_t pio_read_16_argv[] = { { .type = ARG_TYPE_INT } };
static cmd_info_t pio_read_16_info = {
        .name = "pio_read_16",
        .description = "pio_read_16 <address> Read 2 bytes from memory (or port).",
        .func = cmd_pio_read_16,
        .argc = 1,
        .argv = pio_read_16_argv
};

/* Data and methods for pio_read_32 command */
static int cmd_pio_read_32(cmd_arg_t *argv);
static cmd_arg_t pio_read_32_argv[] = { { .type = ARG_TYPE_INT } };
static cmd_info_t pio_read_32_info = {
        .name = "pio_read_32",
        .description = "pio_read_32 <address> Read 4 bytes from memory (or port).",
        .func = cmd_pio_read_32,
        .argc = 1,
        .argv = pio_read_32_argv
};

/* Data and methods for pio_write_8 command */
static int cmd_pio_write_8(cmd_arg_t *argv);
static cmd_arg_t pio_write_8_argv[] = {
        { .type = ARG_TYPE_INT },
        { .type = ARG_TYPE_INT }
};
static cmd_info_t pio_write_8_info = {
        .name = "pio_write_8",
        .description = "pio_write_8 <address> <value> Write 1 byte to memory (or port).",
        .func = cmd_pio_write_8,
        .argc = 2,
        .argv = pio_write_8_argv
};

/* Data and methods for pio_write_16 command */
static int cmd_pio_write_16(cmd_arg_t *argv);
static cmd_arg_t pio_write_16_argv[] = {
        { .type = ARG_TYPE_INT },
        { .type = ARG_TYPE_INT }
};
static cmd_info_t pio_write_16_info = {
        .name = "pio_write_16",
        .description = "pio_write_16 <address> <value> Write 2 bytes to memory (or port).",
        .func = cmd_pio_write_16,
        .argc = 2,
        .argv = pio_write_16_argv
};

/* Data and methods for pio_write_32 command */
static int cmd_pio_write_32(cmd_arg_t *argv);
static cmd_arg_t pio_write_32_argv[] = {
        { .type = ARG_TYPE_INT },
        { .type = ARG_TYPE_INT }
};
static cmd_info_t pio_write_32_info = {
        .name = "pio_write_32",
        .description = "pio_write_32 <address> <value> Write 4 bytes to memory (or port).",
        .func = cmd_pio_write_32,
        .argc = 2,
        .argv = pio_write_32_argv
};

/* Data and methods for 'reboot' command. */
static int cmd_reboot(cmd_arg_t *argv);
static cmd_info_t reboot_info = {
        .name = "reboot",
        .description = "Reboot system.",
        .func = cmd_reboot,
        .argc = 0
};

/* Data and methods for 'uptime' command. */
static int cmd_uptime(cmd_arg_t *argv);
static cmd_info_t uptime_info = {
        .name = "uptime",
        .description = "Show system uptime.",
        .func = cmd_uptime,
        .argc = 0
};

/* Data and methods for 'continue' command. */
static int cmd_continue(cmd_arg_t *argv);
static cmd_info_t continue_info = {
        .name = "continue",
        .description = "Return console back to userspace.",
        .func = cmd_continue,
        .argc = 0
};

#ifdef CONFIG_TEST

/* Data and methods for 'test' command. */
static char test_buf[MAX_CMDLINE + 1];
static int cmd_test(cmd_arg_t *argv);
static cmd_arg_t test_argv[] = {
        {
                .type = ARG_TYPE_STRING_OPTIONAL,
                .buffer = test_buf,
                .len = sizeof(test_buf)
        }
};
static cmd_info_t test_info = {
        .name = "test",
        .description = "<test> List kernel tests or run a test.",
        .func = cmd_test,
        .argc = 1,
        .argv = test_argv,
        .hints_enum = tests_hints_enum
};

/* Data and methods for 'bench' command. */
static int cmd_bench(cmd_arg_t *argv);
static cmd_arg_t bench_argv[] = {
        {
                .type = ARG_TYPE_STRING,
                .buffer = test_buf,
                .len = sizeof(test_buf)
        },
        {
                .type = ARG_TYPE_INT,
        }
};
static cmd_info_t bench_info = {
        .name = "bench",
        .description = "<test> <count> Run kernel test as benchmark.",
        .func = cmd_bench,
        .argc = 2,
        .argv = bench_argv
};

/* Data and methods for 'printbench' command. */
static int cmd_printbench(cmd_arg_t *argv);

static cmd_info_t printbench_info = {
        .name = "printbench",
        .description = "Run a printing benchmark.",
        .func = cmd_printbench,
        .argc = 0,
};

#endif /* CONFIG_TEST */

/* Data and methods for 'description' command. */
static int cmd_desc(cmd_arg_t *argv);
static void desc_help(void);
static char desc_buf[MAX_CMDLINE + 1];
static cmd_arg_t desc_argv = {
        .type = ARG_TYPE_STRING,
        .buffer = desc_buf,
        .len = sizeof(desc_buf)
};
static cmd_info_t desc_info = {
        .name = "describe",
        .description = "<command> Describe specified command.",
        .help = desc_help,
        .func = cmd_desc,
        .argc = 1,
        .argv = &desc_argv,
        .hints_enum = cmdtab_enum
};

/* Data and methods for 'symaddr' command. */
static int cmd_symaddr(cmd_arg_t *argv);
static char symaddr_buf[MAX_CMDLINE + 1];
static cmd_arg_t symaddr_argv = {
        .type = ARG_TYPE_STRING,
        .buffer = symaddr_buf,
        .len = sizeof(symaddr_buf)
};
static cmd_info_t symaddr_info = {
        .name = "symaddr",
        .description = "<symbol> Return symbol address.",
        .func = cmd_symaddr,
        .argc = 1,
        .argv = &symaddr_argv,
        .hints_enum = symtab_hints_enum,
};

/* Data and methods for 'set4' command. */
static char set_buf[MAX_CMDLINE + 1];
static int cmd_set4(cmd_arg_t *argv);
static cmd_arg_t set4_argv[] = {
        {
                .type = ARG_TYPE_STRING,
                .buffer = set_buf,
                .len = sizeof(set_buf)
        },
        {
                .type = ARG_TYPE_INT
        }
};
static cmd_info_t set4_info = {
        .name = "set4",
        .description = "<addr> <value> Set 4B memory location to a value.",
        .func = cmd_set4,
        .argc = 2,
        .argv = set4_argv
};

/* Data and methods for 'call0' and 'mcall0' command. */
static char call0_buf[MAX_CMDLINE + 1];
static char carg1_buf[MAX_CMDLINE + 1];
static char carg2_buf[MAX_CMDLINE + 1];
static char carg3_buf[MAX_CMDLINE + 1];

static int cmd_call0(cmd_arg_t *argv);
static cmd_arg_t call0_argv = {
        .type = ARG_TYPE_STRING,
        .buffer = call0_buf,
        .len = sizeof(call0_buf)
};
static cmd_info_t call0_info = {
        .name = "call0",
        .description = "<function> Call function().",
        .func = cmd_call0,
        .argc = 1,
        .argv = &call0_argv,
        .hints_enum = symtab_hints_enum
};

/* Data and methods for 'mcall0' command. */
static int cmd_mcall0(cmd_arg_t *argv);
static cmd_arg_t mcall0_argv = {
        .type = ARG_TYPE_STRING,
        .buffer = call0_buf,
        .len = sizeof(call0_buf)
};
static cmd_info_t mcall0_info = {
        .name = "mcall0",
        .description = "<function> Call function() on each CPU.",
        .func = cmd_mcall0,
        .argc = 1,
        .argv = &mcall0_argv,
        .hints_enum = symtab_hints_enum
};

/* Data and methods for 'call1' command. */
static int cmd_call1(cmd_arg_t *argv);
static cmd_arg_t call1_argv[] = {
        {
                .type = ARG_TYPE_STRING,
                .buffer = call0_buf,
                .len = sizeof(call0_buf)
        },
        {
                .type = ARG_TYPE_VAR,
                .buffer = carg1_buf,
                .len = sizeof(carg1_buf)
        }
};
static cmd_info_t call1_info = {
        .name = "call1",
        .description = "<function> <arg1> Call function(arg1).",
        .func = cmd_call1,
        .argc = 2,
        .argv = call1_argv,
        .hints_enum = symtab_hints_enum
};

/* Data and methods for 'call2' command. */
static int cmd_call2(cmd_arg_t *argv);
static cmd_arg_t call2_argv[] = {
        {
                .type = ARG_TYPE_STRING,
                .buffer = call0_buf,
                .len = sizeof(call0_buf)
        },
        {
                .type = ARG_TYPE_VAR,
                .buffer = carg1_buf,
                .len = sizeof(carg1_buf)
        },
        {
                .type = ARG_TYPE_VAR,
                .buffer = carg2_buf,
                .len = sizeof(carg2_buf)
        }
};
static cmd_info_t call2_info = {
        .name = "call2",
        .description = "<function> <arg1> <arg2> Call function(arg1, arg2).",
        .func = cmd_call2,
        .argc = 3,
        .argv = call2_argv,
        .hints_enum = symtab_hints_enum
};

/* Data and methods for 'call3' command. */
static int cmd_call3(cmd_arg_t *argv);
static cmd_arg_t call3_argv[] = {
        {
                .type = ARG_TYPE_STRING,
                .buffer = call0_buf,
                .len = sizeof(call0_buf)
        },
        {
                .type = ARG_TYPE_VAR,
                .buffer = carg1_buf,
                .len = sizeof(carg1_buf)
        },
        {
                .type = ARG_TYPE_VAR,
                .buffer = carg2_buf,
                .len = sizeof(carg2_buf)
        },
        {
                .type = ARG_TYPE_VAR,
                .buffer = carg3_buf,
                .len = sizeof(carg3_buf)
        }

};
static cmd_info_t call3_info = {
        .name = "call3",
        .description = "<function> <arg1> <arg2> <arg3> Call function(arg1, arg2, arg3).",
        .func = cmd_call3,
        .argc = 4,
        .argv = call3_argv,
        .hints_enum = symtab_hints_enum
};

/* Data and methods for 'halt' command. */
static int cmd_halt(cmd_arg_t *argv);
static cmd_info_t halt_info = {
        .name = "halt",
        .description = "Halt the kernel.",
        .func = cmd_halt,
        .argc = 0
};

/* Data and methods for 'physmem' command. */
static int cmd_physmem(cmd_arg_t *argv);
cmd_info_t physmem_info = {
        .name = "physmem",
        .description = "Print physical memory configuration.",
        .help = NULL,
        .func = cmd_physmem,
        .argc = 0,
        .argv = NULL
};

/* Data and methods for 'tlb' command. */
static int cmd_tlb(cmd_arg_t *argv);
cmd_info_t tlb_info = {
        .name = "tlb",
        .description = "Print TLB of the current CPU.",
        .help = NULL,
        .func = cmd_tlb,
        .argc = 0,
        .argv = NULL
};

static char flag_buf[MAX_CMDLINE + 1];

static int cmd_threads(cmd_arg_t *argv);
static cmd_arg_t threads_argv = {
        .type = ARG_TYPE_STRING_OPTIONAL,
        .buffer = flag_buf,
        .len = sizeof(flag_buf)
};
static cmd_info_t threads_info = {
        .name = "threads",
        .description = "List all threads (use -a for additional information).",
        .func = cmd_threads,
        .argc = 1,
        .argv = &threads_argv
};

static int cmd_tasks(cmd_arg_t *argv);
static cmd_arg_t tasks_argv = {
        .type = ARG_TYPE_STRING_OPTIONAL,
        .buffer = flag_buf,
        .len = sizeof(flag_buf)
};
static cmd_info_t tasks_info = {
        .name = "tasks",
        .description = "List all tasks (use -a for additional information).",
        .func = cmd_tasks,
        .argc = 1,
        .argv = &tasks_argv
};

#ifdef CONFIG_UDEBUG

/* Data and methods for 'btrace' command */
static int cmd_btrace(cmd_arg_t *argv);
static cmd_arg_t btrace_argv = {
        .type = ARG_TYPE_INT,
};
static cmd_info_t btrace_info = {
        .name = "btrace",
        .description = "<threadid> Show thread stack trace.",
        .func = cmd_btrace,
        .argc = 1,
        .argv = &btrace_argv
};

#endif /* CONFIG_UDEBUG */

static int cmd_sched(cmd_arg_t *argv);
static cmd_info_t sched_info = {
        .name = "scheduler",
        .description = "Show scheduler information.",
        .func = cmd_sched,
        .argc = 0
};

static int cmd_caches(cmd_arg_t *argv);
static cmd_info_t caches_info = {
        .name = "caches",
        .description = "List slab caches.",
        .func = cmd_caches,
        .argc = 0
};

static int cmd_sysinfo(cmd_arg_t *argv);
static cmd_info_t sysinfo_info = {
        .name = "sysinfo",
        .description = "Dump sysinfo.",
        .func = cmd_sysinfo,
        .argc = 0
};

/* Data and methods for 'zones' command */
static int cmd_zones(cmd_arg_t *argv);
static cmd_info_t zones_info = {
        .name = "zones",
        .description = "List memory zones.",
        .func = cmd_zones,
        .argc = 0
};

/* Data and methods for 'zone' command */
static int cmd_zone(cmd_arg_t *argv);
static cmd_arg_t zone_argv = {
        .type = ARG_TYPE_INT,
};

static cmd_info_t zone_info = {
        .name = "zone",
        .description = "<zone> Show memory zone structure.",
        .func = cmd_zone,
        .argc = 1,
        .argv = &zone_argv
};

/* Data and methods for 'ipc' command */
static int cmd_ipc(cmd_arg_t *argv);
static cmd_arg_t ipc_argv = {
        .type = ARG_TYPE_INT,
};
static cmd_info_t ipc_info = {
        .name = "ipc",
        .description = "<taskid> Show IPC information of a task.",
        .func = cmd_ipc,
        .argc = 1,
        .argv = &ipc_argv
};

/* Data and methods for 'kill' command */
static int cmd_kill(cmd_arg_t *argv);
static cmd_arg_t kill_argv = {
        .type = ARG_TYPE_INT,
};
static cmd_info_t kill_info = {
        .name = "kill",
        .description = "<taskid> Kill a task.",
        .func = cmd_kill,
        .argc = 1,
        .argv = &kill_argv
};

/* Data and methods for 'cpus' command. */
static int cmd_cpus(cmd_arg_t *argv);
cmd_info_t cpus_info = {
        .name = "cpus",
        .description = "List all processors.",
        .help = NULL,
        .func = cmd_cpus,
        .argc = 0,
        .argv = NULL
};

/* Data and methods for 'version' command. */
static int cmd_version(cmd_arg_t *argv);
cmd_info_t version_info = {
        .name = "version",
        .description = "Print version information.",
        .help = NULL,
        .func = cmd_version,
        .argc = 0,
        .argv = NULL
};

static cmd_info_t *basic_commands[] = {
        &call0_info,
        &mcall0_info,
        &caches_info,
        &call1_info,
        &call2_info,
        &call3_info,
        &continue_info,
        &cpus_info,
        &desc_info,
        &halt_info,
        &help_info,
        &ipc_info,
        &kill_info,
        &physmem_info,
        &reboot_info,
        &sched_info,
        &set4_info,
        &symaddr_info,
        &sysinfo_info,
        &tasks_info,
        &threads_info,
        &tlb_info,
        &uptime_info,
        &version_info,
        &zones_info,
        &zone_info,
#ifdef CONFIG_TEST
        &test_info,
        &bench_info,
        &printbench_info,
#endif
#ifdef CONFIG_UDEBUG
        &btrace_info,
#endif
        &pio_read_8_info,
        &pio_read_16_info,
        &pio_read_32_info,
        &pio_write_8_info,
        &pio_write_16_info,
        &pio_write_32_info,
        NULL
};

/** Initialize command info structure.
 *
 * @param cmd Command info structure.
 *
 */
void cmd_initialize(cmd_info_t *cmd)
{
        spinlock_initialize(&cmd->lock, "cmd.lock");
        link_initialize(&cmd->link);
}

/** Initialize and register commands. */
void cmd_init(void)
{
        unsigned int i;

        for (i = 0; basic_commands[i]; i++) {
                cmd_initialize(basic_commands[i]);
        }

        for (i = 0; basic_commands[i]; i++) {
                if (!cmd_register(basic_commands[i])) {
                        log(LF_OTHER, LVL_ERROR,
                            "Cannot register command %s",
                            basic_commands[i]->name);
                }
        }
}

/** List supported commands.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
int cmd_help(cmd_arg_t *argv)
{
        spinlock_lock(&cmd_lock);

        size_t len = 0;
        list_foreach(cmd_list, link, cmd_info_t, hlp) {
                spinlock_lock(&hlp->lock);
                if (str_length(hlp->name) > len)
                        len = str_length(hlp->name);
                spinlock_unlock(&hlp->lock);
        }

        unsigned int _len = (unsigned int) len;
        if ((_len != len) || (((int) _len) < 0)) {
                log(LF_OTHER, LVL_ERROR, "Command length overflow");
                return 1;
        }

        list_foreach(cmd_list, link, cmd_info_t, hlp) {
                spinlock_lock(&hlp->lock);
                printf("%-*s %s\n", _len, hlp->name, hlp->description);
                spinlock_unlock(&hlp->lock);
        }

        spinlock_unlock(&cmd_lock);

        return 1;
}

/** Read 1 byte from phys memory or io port.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
static int cmd_pio_read_8(cmd_arg_t *argv)
{
        uint8_t *ptr = NULL;

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                ptr = (void *) argv[0].intval;
        else
#endif
                ptr = (uint8_t *) km_map(argv[0].intval, sizeof(uint8_t),
                    PAGE_SIZE, PAGE_NOT_CACHEABLE);

        const uint8_t val = pio_read_8(ptr);
        printf("read %" PRIxn ": %" PRIx8 "\n", argv[0].intval, val);

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                return 1;
#endif

        km_unmap((uintptr_t) ptr, sizeof(uint8_t));
        return 1;
}

/** Read 2 bytes from phys memory or io port.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
static int cmd_pio_read_16(cmd_arg_t *argv)
{
        uint16_t *ptr = NULL;

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                ptr = (void *) argv[0].intval;
        else
#endif
                ptr = (uint16_t *) km_map(argv[0].intval, sizeof(uint16_t),
                    PAGE_SIZE, PAGE_NOT_CACHEABLE);

        const uint16_t val = pio_read_16(ptr);
        printf("read %" PRIxn ": %" PRIx16 "\n", argv[0].intval, val);

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                return 1;
#endif

        km_unmap((uintptr_t) ptr, sizeof(uint16_t));
        return 1;
}

/** Read 4 bytes from phys memory or io port.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
static int cmd_pio_read_32(cmd_arg_t *argv)
{
        uint32_t *ptr = NULL;

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                ptr = (void *) argv[0].intval;
        else
#endif
                ptr = (uint32_t *) km_map(argv[0].intval, sizeof(uint32_t),
                    PAGE_SIZE, PAGE_NOT_CACHEABLE);

        const uint32_t val = pio_read_32(ptr);
        printf("read %" PRIxn ": %" PRIx32 "\n", argv[0].intval, val);

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                return 1;
#endif

        km_unmap((uintptr_t) ptr, sizeof(uint32_t));
        return 1;
}

/** Write 1 byte to phys memory or io port.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
static int cmd_pio_write_8(cmd_arg_t *argv)
{
        uint8_t *ptr = NULL;

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                ptr = (void *) argv[0].intval;
        else
#endif
                ptr = (uint8_t *) km_map(argv[0].intval, sizeof(uint8_t),
                    PAGE_SIZE, PAGE_NOT_CACHEABLE);

        printf("write %" PRIxn ": %" PRIx8 "\n", argv[0].intval,
            (uint8_t) argv[1].intval);
        pio_write_8(ptr, (uint8_t) argv[1].intval);

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                return 1;
#endif

        km_unmap((uintptr_t) ptr, sizeof(uint8_t));
        return 1;
}

/** Write 2 bytes to phys memory or io port.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
static int cmd_pio_write_16(cmd_arg_t *argv)
{
        uint16_t *ptr = NULL;

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                ptr = (void *) argv[0].intval;
        else
#endif
                ptr = (uint16_t *) km_map(argv[0].intval, sizeof(uint16_t),
                    PAGE_SIZE, PAGE_NOT_CACHEABLE);

        printf("write %" PRIxn ": %" PRIx16 "\n", argv[0].intval,
            (uint16_t) argv[1].intval);
        pio_write_16(ptr, (uint16_t) argv[1].intval);

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                return 1;
#endif

        km_unmap((uintptr_t) ptr, sizeof(uint16_t));
        return 1;
}

/** Write 4 bytes to phys memory or io port.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
static int cmd_pio_write_32(cmd_arg_t *argv)
{
        uint32_t *ptr = NULL;

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                ptr = (void *) argv[0].intval;
        else
#endif
                ptr = (uint32_t *) km_map(argv[0].intval, sizeof(uint32_t),
                    PAGE_SIZE, PAGE_NOT_CACHEABLE);

        printf("write %" PRIxn ": %" PRIx32 "\n", argv[0].intval,
            (uint32_t) argv[1].intval);
        pio_write_32(ptr, (uint32_t) argv[1].intval);

#ifdef IO_SPACE_BOUNDARY
        if ((void *) argv->intval < IO_SPACE_BOUNDARY)
                return 1;
#endif

        km_unmap((uintptr_t) ptr, sizeof(uint32_t));
        return 1;
}

/** Reboot the system.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
int cmd_reboot(cmd_arg_t *argv)
{
        reboot();

        /* Not reached */
        return 1;
}

/** Print system uptime information.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
int cmd_uptime(cmd_arg_t *argv)
{
        assert(uptime);

        /* This doesn't have to be very accurate */
        sysarg_t sec = uptime->seconds1;

        printf("Up %" PRIun " days, %" PRIun " hours, %" PRIun " minutes, %" PRIun " seconds\n",
            sec / 86400, (sec % 86400) / 3600, (sec % 3600) / 60, sec % 60);

        return 1;
}

/** Describe specified command.
 *
 * @param argv Argument vector.
 *
 * @return 0 on failure, 1 on success.
 */
int cmd_desc(cmd_arg_t *argv)
{
        spinlock_lock(&cmd_lock);

        list_foreach(cmd_list, link, cmd_info_t, hlp) {
                spinlock_lock(&hlp->lock);

                if (str_lcmp(hlp->name, (const char *) argv->buffer, str_length(hlp->name)) == 0) {
                        printf("%s - %s\n", hlp->name, hlp->description);
                        if (hlp->help)
                                hlp->help();
                        spinlock_unlock(&hlp->lock);
                        break;
                }

                spinlock_unlock(&hlp->lock);
        }

        spinlock_unlock(&cmd_lock);

        return 1;
}

/** Search symbol table */
int cmd_symaddr(cmd_arg_t *argv)
{
        symtab_print_search((char *) argv->buffer);

        return 1;
}

/** Call function with zero parameters */
int cmd_call0(cmd_arg_t *argv)
{
        uintptr_t symaddr;
        char *symbol;
        sysarg_t (*fnc)(void);
        fncptr_t fptr;
        errno_t rc;

        symbol = (char *) argv->buffer;
        rc = symtab_addr_lookup(symbol, &symaddr);

        if (rc == ENOENT)
                printf("Symbol %s not found.\n", symbol);
        else if (rc == EOVERFLOW) {
                symtab_print_search(symbol);
                printf("Duplicate symbol, be more specific.\n");
        } else if (rc == EOK) {
                ipl_t ipl;

                ipl = interrupts_disable();
                fnc = (sysarg_t (*)(void)) arch_construct_function(&fptr,
                    (void *) symaddr, (void *) cmd_call0);
                printf("Calling %s() (%p)\n", symbol, (void *) symaddr);
                printf("Result: %#" PRIxn "\n", fnc());
                interrupts_restore(ipl);
        } else {
                printf("No symbol information available.\n");
        }
        return 1;
}

/** Call function with zero parameters on each CPU */
int cmd_mcall0(cmd_arg_t *argv)
{
        /*
         * For each CPU, create a thread which will
         * call the function.
         */

        unsigned int i;
        for (i = 0; i < config.cpu_count; i++) {
                if (!cpus[i].active)
                        continue;

                thread_t *thread;
                if ((thread = thread_create((void (*)(void *)) cmd_call0,
                    (void *) argv, TASK, THREAD_FLAG_NONE, "call0"))) {
                        printf("cpu%u: ", i);
                        thread_wire(thread, &cpus[i]);
                        thread_start(thread);
                        thread_join(thread);
                } else
                        printf("Unable to create thread for cpu%u\n", i);
        }

        return 1;
}

/** Call function with one parameter */
int cmd_call1(cmd_arg_t *argv)
{
        uintptr_t symaddr;
        char *symbol;
        sysarg_t (*fnc)(sysarg_t, ...);
        sysarg_t arg1 = argv[1].intval;
        fncptr_t fptr;
        errno_t rc;

        symbol = (char *) argv->buffer;
        rc = symtab_addr_lookup(symbol, &symaddr);

        if (rc == ENOENT) {
                printf("Symbol %s not found.\n", symbol);
        } else if (rc == EOVERFLOW) {
                symtab_print_search(symbol);
                printf("Duplicate symbol, be more specific.\n");
        } else if (rc == EOK) {
                ipl_t ipl;

                ipl = interrupts_disable();
                fnc = (sysarg_t (*)(sysarg_t, ...))
                    arch_construct_function(&fptr, (void *) symaddr,
                    (void *) cmd_call1);
                printf("Calling f(%#" PRIxn "): %p: %s\n", arg1,
                    (void *) symaddr, symbol);
                printf("Result: %#" PRIxn "\n", fnc(arg1));
                interrupts_restore(ipl);
        } else {
                printf("No symbol information available.\n");
        }

        return 1;
}

/** Call function with two parameters */
int cmd_call2(cmd_arg_t *argv)
{
        uintptr_t symaddr;
        char *symbol;
        sysarg_t (*fnc)(sysarg_t, sysarg_t, ...);
        sysarg_t arg1 = argv[1].intval;
        sysarg_t arg2 = argv[2].intval;
        fncptr_t fptr;
        errno_t rc;

        symbol = (char *) argv->buffer;
        rc = symtab_addr_lookup(symbol, &symaddr);

        if (rc == ENOENT) {
                printf("Symbol %s not found.\n", symbol);
        } else if (rc == EOVERFLOW) {
                symtab_print_search(symbol);
                printf("Duplicate symbol, be more specific.\n");
        } else if (rc == EOK) {
                ipl_t ipl;

                ipl = interrupts_disable();
                fnc = (sysarg_t (*)(sysarg_t, sysarg_t, ...))
                    arch_construct_function(&fptr, (void *) symaddr,
                    (void *) cmd_call2);
                printf("Calling f(%#" PRIxn ", %#" PRIxn "): %p: %s\n",
                    arg1, arg2, (void *) symaddr, symbol);
                printf("Result: %#" PRIxn "\n", fnc(arg1, arg2));
                interrupts_restore(ipl);
        } else {
                printf("No symbol information available.\n");
        }
        return 1;
}

/** Call function with three parameters */
int cmd_call3(cmd_arg_t *argv)
{
        uintptr_t symaddr;
        char *symbol;
        sysarg_t (*fnc)(sysarg_t, sysarg_t, sysarg_t, ...);
        sysarg_t arg1 = argv[1].intval;
        sysarg_t arg2 = argv[2].intval;
        sysarg_t arg3 = argv[3].intval;
        fncptr_t fptr;
        errno_t rc;

        symbol = (char *) argv->buffer;
        rc = symtab_addr_lookup(symbol, &symaddr);

        if (rc == ENOENT) {
                printf("Symbol %s not found.\n", symbol);
        } else if (rc == EOVERFLOW) {
                symtab_print_search(symbol);
                printf("Duplicate symbol, be more specific.\n");
        } else if (rc == EOK) {
                ipl_t ipl;

                ipl = interrupts_disable();
                fnc = (sysarg_t (*)(sysarg_t, sysarg_t, sysarg_t, ...))
                    arch_construct_function(&fptr, (void *) symaddr,
                    (void *) cmd_call3);
                printf("Calling f(%#" PRIxn ",%#" PRIxn ", %#" PRIxn "): %p: %s\n",
                    arg1, arg2, arg3, (void *) symaddr, symbol);
                printf("Result: %#" PRIxn "\n", fnc(arg1, arg2, arg3));
                interrupts_restore(ipl);
        } else {
                printf("No symbol information available.\n");
        }
        return 1;
}

/** Print detailed description of 'describe' command. */
void desc_help(void)
{
        printf("Syntax: describe command_name\n");
}

/** Halt the kernel.
 *
 * @param argv Argument vector (ignored).
 *
 * @return 0 on failure, 1 on success (never returns).
 */
int cmd_halt(cmd_arg_t *argv)
{
        halt();
        return 1;
}

/** Command for printing TLB contents.
 *
 * @param argv Not used.
 *
 * @return Always returns 1.
 */
int cmd_tlb(cmd_arg_t *argv)
{
        tlb_print();
        return 1;
}

/** Command for printing physical memory configuration.
 *
 * @param argv Not used.
 *
 * @return Always returns 1.
 */
int cmd_physmem(cmd_arg_t *argv)
{
        physmem_print();
        return 1;
}

/** Write 4 byte value to address */
int cmd_set4(cmd_arg_t *argv)
{
        uintptr_t addr = 0; // Prevent -Werror=maybe-uninitialized
        uint32_t arg1 = argv[1].intval;
        bool pointer = false;
        errno_t rc;

        if (((char *) argv->buffer)[0] == '*') {
                rc = symtab_addr_lookup((char *) argv->buffer + 1, &addr);
                pointer = true;
        } else if (((char *) argv->buffer)[0] >= '0' &&
            ((char *) argv->buffer)[0] <= '9') {
                uint64_t value;
                rc = str_uint64_t((char *) argv->buffer, NULL, 0, true, &value);
                if (rc == EOK)
                        addr = (uintptr_t) value;
        } else
                rc = symtab_addr_lookup((char *) argv->buffer, &addr);

        if (rc == ENOENT)
                printf("Symbol %s not found.\n", (char *) argv->buffer);
        else if (rc == EINVAL)
                printf("Invalid address.\n");
        else if (rc == EOVERFLOW) {
                symtab_print_search((char *) argv->buffer);
                printf("Duplicate symbol (be more specific) or address overflow.\n");
        } else if (rc == EOK) {
                if (pointer)
                        addr = *(uintptr_t *) addr;
                printf("Writing %#" PRIx32 " -> %p\n", arg1, (void *) addr);
                *(uint32_t *) addr = arg1;
        } else
                printf("No symbol information available.\n");

        return 1;
}

/** Command for listing slab allocator caches
 *
 * @param argv Ignored
 *
 * @return Always 1
 */
int cmd_caches(cmd_arg_t *argv)
{
        slab_print_list();
        return 1;
}

/** Command for dumping sysinfo
 *
 * @param argv Ignores
 *
 * @return Always 1
 */
int cmd_sysinfo(cmd_arg_t *argv)
{
        sysinfo_dump(NULL);
        return 1;
}

/** Command for listing thread information
 *
 * @param argv Ignored
 *
 * @return Always 1
 */
int cmd_threads(cmd_arg_t *argv)
{
        if (str_cmp(flag_buf, "-a") == 0)
                thread_print_list(true);
        else if (str_cmp(flag_buf, "") == 0)
                thread_print_list(false);
        else
                printf("Unknown argument \"%s\".\n", flag_buf);

        return 1;
}

/** Command for listing task information
 *
 * @param argv Ignored
 *
 * @return Always 1
 */
int cmd_tasks(cmd_arg_t *argv)
{
        if (str_cmp(flag_buf, "-a") == 0)
                task_print_list(true);
        else if (str_cmp(flag_buf, "") == 0)
                task_print_list(false);
        else
                printf("Unknown argument \"%s\".\n", flag_buf);

        return 1;
}

#ifdef CONFIG_UDEBUG

/** Command for printing thread stack trace
 *
 * @param argv Integer argument from cmdline expected
 *
 * return Always 1
 *
 */
int cmd_btrace(cmd_arg_t *argv)
{
        thread_stack_trace(argv[0].intval);
        return 1;
}

#endif /* CONFIG_UDEBUG */

/** Command for printing scheduler information
 *
 * @param argv Ignores
 *
 * @return Always 1
 */
int cmd_sched(cmd_arg_t *argv)
{
        sched_print_list();
        return 1;
}

/** Command for listing memory zones
 *
 * @param argv Ignored
 *
 * return Always 1
 */
int cmd_zones(cmd_arg_t *argv)
{
        zones_print_list();
        return 1;
}

/** Command for memory zone details
 *
 * @param argv Integer argument from cmdline expected
 *
 * return Always 1
 */
int cmd_zone(cmd_arg_t *argv)
{
        zone_print_one(argv[0].intval);
        return 1;
}

/** Command for printing task IPC details
 *
 * @param argv Integer argument from cmdline expected
 *
 * return Always 1
 */
int cmd_ipc(cmd_arg_t *argv)
{
        ipc_print_task(argv[0].intval);
        return 1;
}

/** Command for killing a task
 *
 * @param argv Integer argument from cmdline expected
 *
 * return 0 on failure, 1 on success.
 */
int cmd_kill(cmd_arg_t *argv)
{
        if (task_kill(argv[0].intval) != EOK)
                return 0;

        return 1;
}

/** Command for listing processors.
 *
 * @param argv Ignored.
 *
 * return Always 1.
 */
int cmd_cpus(cmd_arg_t *argv)
{
        cpu_list();
        return 1;
}

/** Command for printing kernel version.
 *
 * @param argv Ignored.
 *
 * return Always 1.
 */
int cmd_version(cmd_arg_t *argv)
{
        version_print();
        return 1;
}

/** Command for returning console back to userspace.
 *
 * @param argv Ignored.
 *
 * return Always 1.
 */
int cmd_continue(cmd_arg_t *argv)
{
        printf("The kernel will now relinquish the console.\n");
        release_console();
        indev_pop_character(stdin);

        return 1;
}

#ifdef CONFIG_TEST
static bool run_test(const test_t *test)
{
        printf("%s (%s)\n", test->name, test->desc);

        /*
         * Update and read thread accounting
         * for benchmarking
         */
        irq_spinlock_lock(&TASK->lock, true);
        uint64_t ucycles0, kcycles0;
        task_get_accounting(TASK, &ucycles0, &kcycles0);
        irq_spinlock_unlock(&TASK->lock, true);

        /* Execute the test */
        test_quiet = false;
        const char *ret = test->entry();

        /* Update and read thread accounting */
        uint64_t ucycles1, kcycles1;
        irq_spinlock_lock(&TASK->lock, true);
        task_get_accounting(TASK, &ucycles1, &kcycles1);
        irq_spinlock_unlock(&TASK->lock, true);

        uint64_t ucycles, kcycles;
        char usuffix, ksuffix;
        order_suffix(ucycles1 - ucycles0, &ucycles, &usuffix);
        order_suffix(kcycles1 - kcycles0, &kcycles, &ksuffix);

        printf("Time: %" PRIu64 "%c user cycles, %" PRIu64 "%c kernel cycles\n",
            ucycles, usuffix, kcycles, ksuffix);

        if (ret == NULL) {
                printf("Test passed\n");
                return true;
        }

        printf("%s\n", ret);
        return false;
}

static bool run_bench(const test_t *test, const uint32_t cnt)
{
        uint32_t i;
        bool ret = true;
        uint64_t ucycles, kcycles;
        char usuffix, ksuffix;

        if (cnt < 1)
                return true;

        uint64_t *data = (uint64_t *) malloc(sizeof(uint64_t) * cnt);
        if (data == NULL) {
                printf("Error allocating memory for statistics\n");
                return false;
        }

        for (i = 0; i < cnt; i++) {
                printf("%s (%u/%u) ... ", test->name, i + 1, cnt);

                /*
                 * Update and read thread accounting
                 * for benchmarking
                 */
                irq_spinlock_lock(&TASK->lock, true);
                uint64_t ucycles0, kcycles0;
                task_get_accounting(TASK, &ucycles0, &kcycles0);
                irq_spinlock_unlock(&TASK->lock, true);

                /* Execute the test */
                test_quiet = true;
                const char *test_ret = test->entry();

                /* Update and read thread accounting */
                irq_spinlock_lock(&TASK->lock, true);
                uint64_t ucycles1, kcycles1;
                task_get_accounting(TASK, &ucycles1, &kcycles1);
                irq_spinlock_unlock(&TASK->lock, true);

                if (test_ret != NULL) {
                        printf("%s\n", test_ret);
                        ret = false;
                        break;
                }

                data[i] = ucycles1 - ucycles0 + kcycles1 - kcycles0;
                order_suffix(ucycles1 - ucycles0, &ucycles, &usuffix);
                order_suffix(kcycles1 - kcycles0, &kcycles, &ksuffix);
                printf("OK (%" PRIu64 "%c user cycles, %" PRIu64 "%c kernel cycles)\n",
                    ucycles, usuffix, kcycles, ksuffix);
        }

        if (ret) {
                printf("\n");

                uint64_t sum = 0;

                for (i = 0; i < cnt; i++) {
                        sum += data[i];
                }

                order_suffix(sum / (uint64_t) cnt, &ucycles, &usuffix);
                printf("Average\t\t%" PRIu64 "%c\n", ucycles, usuffix);
        }

        free(data);

        return ret;
}

static void list_tests(void)
{
        size_t len = 0;
        test_t *test;

        for (test = tests; test->name != NULL; test++) {
                if (str_length(test->name) > len)
                        len = str_length(test->name);
        }

        unsigned int _len = (unsigned int) len;
        if ((_len != len) || (((int) _len) < 0)) {
                printf("Command length overflow\n");
                return;
        }

        for (test = tests; test->name != NULL; test++)
                printf("%-*s %s%s\n", _len, test->name, test->desc,
                    (test->safe ? "" : " (unsafe)"));

        printf("%-*s Run all safe tests\n", _len, "*");
}

/** Command for listing and running kernel tests
 *
 * @param argv Argument vector.
 *
 * return Always 1.
 *
 */
int cmd_test(cmd_arg_t *argv)
{
        test_t *test;

        if (str_cmp((char *) argv->buffer, "*") == 0) {
                for (test = tests; test->name != NULL; test++) {
                        if (test->safe) {
                                printf("\n");
                                if (!run_test(test))
                                        break;
                        }
                }
        } else if (str_cmp((char *) argv->buffer, "") != 0) {
                bool fnd = false;

                for (test = tests; test->name != NULL; test++) {
                        if (str_cmp(test->name, (char *) argv->buffer) == 0) {
                                fnd = true;
                                run_test(test);
                                break;
                        }
                }

                if (!fnd)
                        printf("Unknown test\n");
        } else
                list_tests();

        return 1;
}

/** Command for returning kernel tests as benchmarks
 *
 * @param argv Argument vector.
 *
 * return Always 1.
 */
int cmd_bench(cmd_arg_t *argv)
{
        test_t *test;
        uint32_t cnt = argv[1].intval;

        if (str_cmp((char *) argv->buffer, "*") == 0) {
                for (test = tests; test->name != NULL; test++) {
                        if (test->safe) {
                                if (!run_bench(test, cnt))
                                        break;
                        }
                }
        } else {
                bool fnd = false;

                for (test = tests; test->name != NULL; test++) {
                        if (str_cmp(test->name, (char *) argv->buffer) == 0) {
                                fnd = true;

                                if (test->safe)
                                        run_bench(test, cnt);
                                else
                                        printf("Unsafe test\n");

                                break;
                        }
                }

                if (!fnd)
                        printf("Unknown test\n");
        }

        return 1;
}

int cmd_printbench(cmd_arg_t *argv)
{
        int cnt = 20;

        uint64_t *data = malloc(sizeof(uint64_t) * cnt);
        if (data == NULL) {
                printf("Error allocating memory for statistics\n");
                return false;
        }

        for (int i = 0; i < cnt; i++) {
                /*
                 * Update and read thread accounting
                 * for benchmarking
                 */
                irq_spinlock_lock(&TASK->lock, true);
                uint64_t ucycles0, kcycles0;
                task_get_accounting(TASK, &ucycles0, &kcycles0);
                irq_spinlock_unlock(&TASK->lock, true);

                /* Execute the test */
                for (int j = 0; j < 20; j++) {
                        printf("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789ěščřžýáíéú!@#$%%^&*(){}+\n");
                        printf("ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789ěščřžýáíéú!@#$%%^&*(){}+abcdefghijklmnopqrstuvwxyz\n");
                        printf("0123456789ěščřžýáíéú!@#$%%^&*(){}+abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ\n");
                }

                /* Update and read thread accounting */
                irq_spinlock_lock(&TASK->lock, true);
                uint64_t ucycles1, kcycles1;
                task_get_accounting(TASK, &ucycles1, &kcycles1);
                irq_spinlock_unlock(&TASK->lock, true);

                data[i] = ucycles1 - ucycles0 + kcycles1 - kcycles0;
        }

        printf("\n");

        uint64_t cycles;
        char suffix;
        uint64_t sum = 0;

        for (int i = 0; i < cnt; i++) {
                sum += data[i];
        }

        order_suffix(sum / (uint64_t) cnt, &cycles, &suffix);
        printf("Average\t\t%" PRIu64 "%c\n", cycles, suffix);

        free(data);

        return true;
}

#endif

/** @}
 */