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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.

 */

/**

 * @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 <console/cmd.h>

#include <console/console.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

};

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

};

/** 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,

	&continue_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", sizeof(__address) * 2, symaddr, symbol);

		f =  (__native (*)(void)) symaddr;

		printf("Result: %#zx\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, sizeof(__address) * 2, symaddr, symbol);

		f =  (__native (*)(__native,...)) symaddr;

		printf("Result: %#zx\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, sizeof(__address) * 2, symaddr, symbol);

		f =  (__native (*)(__native,__native,...)) symaddr;

		printf("Result: %#zx\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, sizeof(__address) * 2, symaddr, symbol);

		f =  (__native (*)(__native,__native,__native,...)) symaddr;

		printf("Result: %#zx\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, sizeof(__address) * 2, 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;

}

/** Command for returning console back to userspace.

 *

 * @param argv Ignored.

 *

 * return Always 1.

 */

int cmd_continue(cmd_arg_t *argv)

{

	arch_release_console();

	return 1;

}