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/*
 * 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.
 */

/**
 * 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 <console/cmd.h>
#include <console/kconsole.h>
#include <print.h>
#include <panic.h>
#include <typedefs.h>
#include <arch/types.h>
#include <adt/list.h>
#include <arch.h>
#include <func.h>
#include <macros.h>
#include <debug.h>
#include <symtab.h>
#include <cpu.h>
#include <mm/tlb.h>
#include <arch/mm/tlb.h>
#include <mm/frame.h>
#include <main/version.h>
#include <mm/slab.h>
#include <proc/scheduler.h>
#include <proc/thread.h>
#include <proc/task.h>

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

static cmd_info_t exit_info = {
    .name = "exit",
    .description ="Exit kconsole",
    .argc = 0
};

/** 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 = "Describe specified command.",
    .help = desc_help,
    .func = cmd_desc,
    .argc = 1,
    .argv = &desc_argv
};

/** 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 = "Return symbol address.",
    .func = cmd_symaddr,
    .argc = 1,
    .argv = &symaddr_argv
};

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 = "set <dest_addr> <value> - 4byte version",
    .func = cmd_set4,
    .argc = 2,
    .argv = set4_argv
};

/** Data and methods for 'call0' 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 = "call0 <function> -> call function().",
    .func = cmd_call0,
    .argc = 1,
    .argv = &call0_argv
};

/** 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 = "call1 <function> <arg1> -> call function(arg1).",
    .func = cmd_call1,
    .argc = 2,
    .argv = call1_argv
};

/** 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 = "call2 <function> <arg1> <arg2> -> call function(arg1,arg2).",
    .func = cmd_call2,
    .argc = 3,
    .argv = call2_argv
};

/** 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 = "call3 <function> <arg1> <arg2> <arg3> -> call function(arg1,arg2,arg3).",
    .func = cmd_call3,
    .argc = 4,
    .argv = call3_argv
};

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

static int cmd_threads(cmd_arg_t *argv);
static cmd_info_t threads_info = {
    .name = "threads",
    .description = "List all threads",
    .func = cmd_threads,
    .argc = 0
};

static int cmd_tasks(cmd_arg_t *argv);
static cmd_info_t tasks_info = {
    .name = "tasks",
    .description = "List all tasks",
    .func = cmd_tasks,
    .argc = 0
};


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

static int cmd_slabs(cmd_arg_t *argv);
static cmd_info_t slabs_info = {
    .name = "slabs",
    .description = "List SLAB caches.",
    .func = cmd_slabs,
    .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 of 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 = "Show memory zone structure.",
    .func = cmd_zone,
    .argc = 1,
    .argv = &zone_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,
    &call1_info,
    &call2_info,
    &call3_info,
    &cpus_info,
    &desc_info,
    &exit_info,
    &halt_info,
    &help_info,
    &set4_info,
    &slabs_info,
    &symaddr_info,
    &sched_info,
    &threads_info,
    &tasks_info,
    &tlb_info,
    &version_info,
    &zones_info,
    &zone_info,
    NULL
};


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

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

    for (i=0;basic_commands[i]; i++) {
        cmd_initialize(basic_commands[i]);
        if (!cmd_register(basic_commands[i]))
            panic("could not register command %s\n", 
                  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)
{
    link_t *cur;

    spinlock_lock(&cmd_lock);
    
    for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
        cmd_info_t *hlp;
        
        hlp = list_get_instance(cur, cmd_info_t, link);
        spinlock_lock(&hlp->lock);
        
        printf("%s - %s\n", hlp->name, hlp->description);

        spinlock_unlock(&hlp->lock);
    }
    
    spinlock_unlock(&cmd_lock); 

    return 1;
}

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

    spinlock_lock(&cmd_lock);
    
    for (cur = cmd_head.next; cur != &cmd_head; cur = cur->next) {
        cmd_info_t *hlp;
        
        hlp = list_get_instance(cur, cmd_info_t, link);
        spinlock_lock(&hlp->lock);

        if (strncmp(hlp->name, (const char *) argv->buffer, strlen(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(argv->buffer);
    
    return 1;
}

/** Call function with zero parameters */
int cmd_call0(cmd_arg_t *argv)
{
    __address symaddr;
    char *symbol;
    __native (*f)(void);

    symaddr = get_symbol_addr(argv->buffer);
    if (!symaddr)
        printf("Symbol %s not found.\n", argv->buffer);
    else if (symaddr == (__address) -1) {
        symtab_print_search(argv->buffer);
        printf("Duplicate symbol, be more specific.\n");
    } else {
        symbol = get_symtab_entry(symaddr);
        printf("Calling f(): %p: %s\n", symaddr, symbol);
        f =  (__native (*)(void)) symaddr;
        printf("Result: %p\n", f());
    }
    
    return 1;
}

/** Call function with one parameter */
int cmd_call1(cmd_arg_t *argv)
{
    __address symaddr;
    char *symbol;
    __native (*f)(__native,...);
    __native arg1 = argv[1].intval;

    symaddr = get_symbol_addr(argv->buffer);
    if (!symaddr)
        printf("Symbol %s not found.\n", argv->buffer);
    else if (symaddr == (__address) -1) {
        symtab_print_search(argv->buffer);
        printf("Duplicate symbol, be more specific.\n");
    } else {
        symbol = get_symtab_entry(symaddr);
        printf("Calling f(0x%zX): %p: %s\n", arg1, symaddr, symbol);
        f =  (__native (*)(__native,...)) symaddr;
        printf("Result: %p\n", f(arg1));
    }
    
    return 1;
}

/** Call function with two parameters */
int cmd_call2(cmd_arg_t *argv)
{
    __address symaddr;
    char *symbol;
    __native (*f)(__native,__native,...);
    __native arg1 = argv[1].intval;
    __native arg2 = argv[2].intval;

    symaddr = get_symbol_addr(argv->buffer);
    if (!symaddr)
        printf("Symbol %s not found.\n", argv->buffer);
    else if (symaddr == (__address) -1) {
        symtab_print_search(argv->buffer);
        printf("Duplicate symbol, be more specific.\n");
    } else {
        symbol = get_symtab_entry(symaddr);
        printf("Calling f(0x%zx,0x%zx): %p: %s\n", 
               arg1, arg2, symaddr, symbol);
        f =  (__native (*)(__native,__native,...)) symaddr;
        printf("Result: %p\n", f(arg1, arg2));
    }
    
    return 1;
}

/** Call function with three parameters */
int cmd_call3(cmd_arg_t *argv)
{
    __address symaddr;
    char *symbol;
    __native (*f)(__native,__native,__native,...);
    __native arg1 = argv[1].intval;
    __native arg2 = argv[2].intval;
    __native arg3 = argv[3].intval;

    symaddr = get_symbol_addr(argv->buffer);
    if (!symaddr)
        printf("Symbol %s not found.\n", argv->buffer);
    else if (symaddr == (__address) -1) {
        symtab_print_search(argv->buffer);
        printf("Duplicate symbol, be more specific.\n");
    } else {
        symbol = get_symtab_entry(symaddr);
        printf("Calling f(0x%zx,0x%zx, 0x%zx): %p: %s\n", 
               arg1, arg2, arg3, symaddr, symbol);
        f =  (__native (*)(__native,__native,__native,...)) symaddr;
        printf("Result: %p\n", f(arg1, arg2, arg3));
    }
    
    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;
}

/** Write 4 byte value to address */
int cmd_set4(cmd_arg_t *argv)
{
    __u32 *addr ;
    __u32 arg1 = argv[1].intval;
    bool pointer = false;

    if (((char *)argv->buffer)[0] == '*') {
        addr = (__u32 *) get_symbol_addr(argv->buffer+1);
        pointer = true;
    } else if (((char *)argv->buffer)[0] >= '0' && 
           ((char *)argv->buffer)[0] <= '9')
        addr = (__u32 *)atoi((char *)argv->buffer);
    else
        addr = (__u32 *)get_symbol_addr(argv->buffer);

    if (!addr)
        printf("Symbol %s not found.\n", argv->buffer);
    else if (addr == (__u32 *) -1) {
        symtab_print_search(argv->buffer);
        printf("Duplicate symbol, be more specific.\n");
    } else {
        if (pointer)
            addr = (__u32 *)(*(__native *)addr);
        printf("Writing 0x%x -> %p\n", arg1, addr);
        *addr = arg1;
        
    }
    
    return 1;
}

/** Command for listings SLAB caches
 *
 * @param argv Ignores
 *
 * @return Always 1
 */
int cmd_slabs(cmd_arg_t * argv) {
    slab_print_list();
    return 1;
}


/** Command for listings Thread information
 *
 * @param argv Ignores
 *
 * @return Always 1
 */
int cmd_threads(cmd_arg_t * argv) {
    thread_print_list();
    return 1;
}

/** Command for listings Task information
 *
 * @param argv Ignores
 *
 * @return Always 1
 */
int cmd_tasks(cmd_arg_t * argv) {
    task_print_list();
    return 1;
}

/** Command for listings Thread 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) {
    zone_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 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;
}