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sandbox: Add architecture header files

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This adds required header files for the sandbox architecture, and a basic
description of what sandbox is (README.sandbox).

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2011-10-10 08:22:14 +00:00 • committed by Wolfgang Denk
parent e72f0b1521
commit 744d9859a7
15 changed files with 739 additions and 0 deletions
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162
arch/sandbox/include/asm/bitops.h Normal file
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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* Copyright 1995, Russell King.
* Various bits and pieces copyrights include:
* Linus Torvalds (test_bit).
*
* bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
*
* Please note that the code in this file should never be included
* from user space. Many of these are not implemented in assembler
* since they would be too costly. Also, they require priviledged
* instructions (which are not available from user mode) to ensure
* that they are atomic.
*/
#ifndef __ASM_SANDBOX_BITOPS_H
#define __ASM_SANDBOX_BITOPS_H
#include <asm/system.h>
#ifdef __KERNEL__
#define smp_mb__before_clear_bit() do { } while (0)
#define smp_mb__after_clear_bit() do { } while (0)
/*
* Function prototypes to keep gcc -Wall happy.
*/
extern void set_bit(int nr, void *addr);
extern void clear_bit(int nr, void *addr);
extern void change_bit(int nr, void *addr);
static inline void __change_bit(int nr, void *addr)
{
unsigned long mask = BIT_MASK(nr);
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
*p ^= mask;
}
static inline int __test_and_set_bit(int nr, void *addr)
{
unsigned long mask = BIT_MASK(nr);
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
unsigned long old = *p;
*p = old | mask;
return (old & mask) != 0;
}
static inline int test_and_set_bit(int nr, void *addr)
{
unsigned long flags;
int out;
local_irq_save(flags);
out = __test_and_set_bit(nr, addr);
local_irq_restore(flags);
return out;
}
static inline int __test_and_clear_bit(int nr, void *addr)
{
unsigned long mask = BIT_MASK(nr);
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
unsigned long old = *p;
*p = old & ~mask;
return (old & mask) != 0;
}
static inline int test_and_clear_bit(int nr, void *addr)
{
unsigned long flags;
int out;
local_irq_save(flags);
out = __test_and_clear_bit(nr, addr);
local_irq_restore(flags);
return out;
}
extern int test_and_change_bit(int nr, void *addr);
static inline int __test_and_change_bit(int nr, void *addr)
{
unsigned long mask = BIT_MASK(nr);
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
unsigned long old = *p;
*p = old ^ mask;
return (old & mask) != 0;
}
extern int find_first_zero_bit(void *addr, unsigned size);
extern int find_next_zero_bit(void *addr, int size, int offset);
/*
* This routine doesn't need to be atomic.
*/
static inline int test_bit(int nr, const void *addr)
{
return ((unsigned char *) addr)[nr >> 3] & (1U << (nr & 7));
}
/*
* ffz = Find First Zero in word. Undefined if no zero exists,
* so code should check against ~0UL first..
*/
static inline unsigned long ffz(unsigned long word)
{
int k;
word = ~word;
k = 31;
if (word & 0x0000ffff) {
k -= 16; word <<= 16;
}
if (word & 0x00ff0000) {
k -= 8; word <<= 8;
}
if (word & 0x0f000000) {
k -= 4; word <<= 4;
}
if (word & 0x30000000) {
k -= 2; word <<= 2;
}
if (word & 0x40000000)
k -= 1;
return k;
}
/*
* hweightN: returns the hamming weight (i.e. the number
* of bits set) of a N-bit word
*/
#define hweight32(x) generic_hweight32(x)
#define hweight16(x) generic_hweight16(x)
#define hweight8(x) generic_hweight8(x)
#define ext2_set_bit test_and_set_bit
#define ext2_clear_bit test_and_clear_bit
#define ext2_test_bit test_bit
#define ext2_find_first_zero_bit find_first_zero_bit
#define ext2_find_next_zero_bit find_next_zero_bit
/* Bitmap functions for the minix filesystem. */
#define minix_test_and_set_bit(nr, addr) test_and_set_bit(nr, addr)
#define minix_set_bit(nr, addr) set_bit(nr, addr)
#define minix_test_and_clear_bit(nr, addr) test_and_clear_bit(nr, addr)
#define minix_test_bit(nr, addr) test_bit(nr, addr)
#define minix_find_first_zero_bit(addr, size) find_first_zero_bit(addr, size)
#endif /* __KERNEL__ */
#endif /* _ARM_BITOPS_H */

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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __ASM_SANDBOX_BYTEORDER_H
#define __ASM_SANDBOX_BYTEORDER_H
#include <asm/types.h>
#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
# define __BYTEORDER_HAS_U64__
# define __SWAB_64_THRU_32__
#endif
#ifdef CONFIG_SANDBOX_BIG_ENDIAN
#include <linux/byteorder/big_endian.h>
#else
#include <linux/byteorder/little_endian.h>
#endif
#endif

26
arch/sandbox/include/asm/config.h Normal file
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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#ifndef _ASM_CONFIG_H_
#define _ASM_CONFIG_H_
#define CONFIG_SANDBOX_ARCH
#endif

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arch/sandbox/include/asm/global_data.h Normal file
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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* (C) Copyright 2002-2010
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __ASM_GBL_DATA_H
#define __ASM_GBL_DATA_H
/*
* The following data structure is placed in some memory wich is
* available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
* some locked parts of the data cache) to allow for a minimum set of
* global variables during system initialization (until we have set
* up the memory controller so that we can use RAM).
*
* Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
*/
typedef struct global_data {
bd_t *bd;
unsigned long flags;
unsigned long baudrate;
unsigned long have_console; /* serial_init() was called */
unsigned long env_addr; /* Address of Environment struct */
unsigned long env_valid; /* Checksum of Environment valid? */
unsigned long fb_base; /* base address of frame buffer */
u8 *ram_buf; /* emulated RAM buffer */
phys_size_t ram_size; /* RAM size */
void **jt; /* jump table */
char env_buf[32]; /* buffer for getenv() before reloc. */
} gd_t;
/*
* Global Data Flags
*/
#define GD_FLG_RELOC 0x00001 /* Code was relocated to RAM */
#define GD_FLG_DEVINIT 0x00002 /* Devices have been initialized */
#define GD_FLG_SILENT 0x00004 /* Silent mode */
#define GD_FLG_POSTFAIL 0x00008 /* Critical POST test failed */
#define GD_FLG_POSTSTOP 0x00010 /* POST seqeunce aborted */
#define GD_FLG_LOGINIT 0x00020 /* Log Buffer has been initialized */
#define GD_FLG_DISABLE_CONSOLE 0x00040 /* Disable console (in & out) */
#define GD_FLG_ENV_READY 0x00080 /* Env. imported into hash table */
#define DECLARE_GLOBAL_DATA_PTR extern gd_t *gd
#endif /* __ASM_GBL_DATA_H */

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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* Given a physical address and a length, return a virtual address
* that can be used to access the memory range with the caching
* properties specified by "flags".
*/
#define MAP_NOCACHE (0)
#define MAP_WRCOMBINE (0)
#define MAP_WRBACK (0)
#define MAP_WRTHROUGH (0)
void *map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags);
/*
* Take down a mapping set up by map_physmem().
*/
static inline void unmap_physmem(void *vaddr, unsigned long flags)
{
}

57
arch/sandbox/include/asm/posix_types.h Normal file
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/*
* linux/include/asm-arm/posix_types.h
*
* Copyright (C) 1996-1998 Russell King.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Changelog:
* 27-06-1996 RMK Created
*/
#ifndef __ARCH_ARM_POSIX_TYPES_H
#define __ARCH_ARM_POSIX_TYPES_H
/*
* This file is generally used by user-level software, so you need to
* be a little careful about namespace pollution etc. Also, we cannot
* assume GCC is being used.
*/
typedef unsigned short __kernel_dev_t;
typedef unsigned long __kernel_ino_t;
typedef unsigned short __kernel_mode_t;
typedef unsigned short __kernel_nlink_t;
typedef long __kernel_off_t;
typedef int __kernel_pid_t;
typedef unsigned short __kernel_ipc_pid_t;
typedef unsigned short __kernel_uid_t;
typedef unsigned short __kernel_gid_t;
#if CONFIG_SANDBOX_BITS_PER_LONG == 32
typedef unsigned int __kernel_size_t;
typedef int __kernel_ssize_t;
typedef int __kernel_ptrdiff_t;
#else
typedef unsigned long __kernel_size_t;
typedef long __kernel_ssize_t;
typedef long __kernel_ptrdiff_t;
#endif
typedef long __kernel_time_t;
typedef long __kernel_suseconds_t;
typedef long __kernel_clock_t;
typedef int __kernel_daddr_t;
typedef char *__kernel_caddr_t;
typedef unsigned short __kernel_uid16_t;
typedef unsigned short __kernel_gid16_t;
typedef unsigned int __kernel_uid32_t;
typedef unsigned int __kernel_gid32_t;
typedef unsigned short __kernel_old_uid_t;
typedef unsigned short __kernel_old_gid_t;
#ifdef __GNUC__
typedef long long __kernel_loff_t;
#endif
#endif

38
arch/sandbox/include/asm/ptrace.h Normal file
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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __ASM_SANDBOX_PTRACE_H
#define __ASM_SANDBOX_PTRACE_H
#ifndef __ASSEMBLY__
/* This is not used in the sandbox architecture, but required by U-Boot */
struct pt_regs {
};
#ifdef __KERNEL__
extern void show_regs(struct pt_regs *);
#endif
#endif /* __ASSEMBLY__ */
#endif

23
arch/sandbox/include/asm/string.h Normal file
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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <linux/string.h>

36
arch/sandbox/include/asm/system.h Normal file
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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __ASM_SANDBOX_SYSTEM_H
#define __ASM_SANDBOX_SYSTEM_H
/* Define this as nops for sandbox architecture */
static inline void local_irq_save(unsigned flags __attribute__((unused)))
{
}
#define local_irq_enable()
#define local_irq_disable()
#define local_save_flags(x)
#define local_irq_restore(x)
#endif

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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __ASM_SANDBOX_TYPES_H
#define __ASM_SANDBOX_TYPES_H
typedef unsigned short umode_t;
/*
* __xx is ok: it doesn't pollute the POSIX namespace. Use these in the
* header files exported to user space
*/
typedef __signed__ char __s8;
typedef unsigned char __u8;
typedef __signed__ short __s16;
typedef unsigned short __u16;
typedef __signed__ int __s32;
typedef unsigned int __u32;
#if defined(__GNUC__)
__extension__ typedef __signed__ long long __s64;
__extension__ typedef unsigned long long __u64;
#endif
/*
* These aren't exported outside the kernel to avoid name space clashes
*/
#ifdef __KERNEL__
typedef signed char s8;
typedef unsigned char u8;
typedef signed short s16;
typedef unsigned short u16;
typedef signed int s32;
typedef unsigned int u32;
typedef signed long long s64;
typedef unsigned long long u64;
#define BITS_PER_LONG CONFIG_SANDBOX_BITS_PER_LONG
typedef unsigned long dma_addr_t;
typedef unsigned long phys_addr_t;
typedef unsigned long phys_size_t;
#endif /* __KERNEL__ */
#endif

38
arch/sandbox/include/asm/u-boot-sandbox.h Normal file
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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Alex Zuepke <azu@sysgo.de>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef _U_BOOT_SANDBOX_H_
#define _U_BOOT_SANDBOX_H_
/* board/.../... */
int board_init(void);
int dram_init(void);
#endif /* _U_BOOT_SANDBOX_H_ */

61
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/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Alex Zuepke <azu@sysgo.de>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
********************************************************************
* NOTE: This header file defines an interface to U-Boot. Including
* this (unmodified) header file in another file is considered normal
* use of U-Boot, and does *not* fall under the heading of "derived
* work".
********************************************************************
*/
#ifndef _U_BOOT_H_
#define _U_BOOT_H_ 1
typedef struct bd_info {
unsigned long bi_memstart; /* start of DRAM memory */
phys_size_t bi_memsize; /* size of DRAM memory in bytes */
unsigned long bi_flashstart; /* start of FLASH memory */
unsigned long bi_flashsize; /* size of FLASH memory */
unsigned long bi_flashoffset; /* reserved area for startup monitor */
unsigned long bi_sramstart; /* start of SRAM memory */
unsigned long bi_sramsize; /* size of SRAM memory */
unsigned long bi_bootflags; /* boot / reboot flag (for LynxOS) */
unsigned long bi_ip_addr; /* IP Address */
unsigned short bi_ethspeed; /* Ethernet speed in Mbps */
unsigned long bi_intfreq; /* Internal Freq, in MHz */
unsigned long bi_busfreq; /* Bus Freq, in MHz */
unsigned int bi_baudrate; /* Console Baudrate */
unsigned long bi_boot_params; /* where this board expects params */
struct /* RAM configuration */
{
ulong start;
ulong size;
} bi_dram[CONFIG_NR_DRAM_BANKS];
} bd_t;
#endif /* _U_BOOT_H_ */

23
arch/sandbox/include/asm/unaligned.h Normal file
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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <asm-generic/unaligned.h>

53
doc/README.sandbox Normal file
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/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
Native Execution of U-Boot
==========================
The 'sandbox' architecture is designed to allow U-Boot to run under Linux on
almost any hardware. To achieve this it builds U-Boot (so far as possible)
as a normal C application with a main() and normal C libraries.
All of U-Boot's architecture-specific code therefore cannot be built as part
of the sandbox U-Boot. The purpose of running U-Boot under Linux is to test
all the generic code, not specific to any one architecture. The idea is to
create unit tests which we can run to test this upper level code.
CONFIG_SANDBOX is defined when building a native board.
The chosen vendor and board names are also 'sandbox', so there is a single
board in board/sandbox/sandbox.
CONFIG_SANDBOX_BIG_ENDIAN should be defined when running on big-endian
machines.
Note that standalone/API support is not available at present.
The serial driver is a very simple implementation which reads and writes to
the console. It does not set the terminal into raw mode, so cursor keys and
history will not work yet.
Tests
-----
So far we have no tests, but when we do these will be documented here.

3
include/common.h
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@ -311,6 +311,9 @@ int setenv (const char *, const char *);
#ifdef CONFIG_X86 /* x86 version to be fixed! */
# include <asm/u-boot-x86.h>
#endif /* CONFIG_X86 */
#ifdef CONFIG_SANDBOX
# include <asm/u-boot-sandbox.h> /* TODO(sjg) what needs to be fixed? */
#endif
#ifdef CONFIG_AUTO_COMPLETE
int env_complete(char *var, int maxv, char *cmdv[], int maxsz, char *buf);