[people/ms/u-boot.git] / env / embedded.c

/*
 * (C) Copyright 2001
 * Erik Theisen,  Wave 7 Optics, etheisen@mindspring.com.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <linux/kconfig.h>

#ifndef __ASSEMBLY__
#define	__ASSEMBLY__			/* Dirty trick to get only #defines */
#endif
#define	__ASM_STUB_PROCESSOR_H__	/* don't include asm/processor. */
#include <config.h>
#undef	__ASSEMBLY__
#include <environment.h>
#include <linux/stringify.h>

/* Handle HOSTS that have prepended crap on symbol names, not TARGETS. */
#if defined(__APPLE__)
/* Leading underscore on symbols */
#  define SYM_CHAR "_"
#else /* No leading character on symbols */
#  define SYM_CHAR
#endif

/*
 * Generate embedded environment table
 * inside U-Boot image, if needed.
 */
#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_BUILD_ENVCRC)
/*
 * Put the environment in the .text section when we are building
 * U-Boot proper.  The host based program "tools/envcrc" does not need
 * a seperate section.
 */
#if defined(USE_HOSTCC) /* Native for 'tools/envcrc' */
#  define __UBOOT_ENV_SECTION__	/*XXX DO_NOT_DEL_THIS_COMMENT*/

#else /* Environment is embedded in U-Boot's .text section */
/* XXX - This only works with GNU C */
#  define __UBOOT_ENV_SECTION__	__attribute__ ((section(".text")))
#endif

/*
 * Macros to generate global absolutes.
 */
#if defined(__bfin__)
# define GEN_SET_VALUE(name, value)	\
	asm(".set " GEN_SYMNAME(name) ", " GEN_VALUE(value))
#else
# define GEN_SET_VALUE(name, value)	\
	asm(GEN_SYMNAME(name) " = " GEN_VALUE(value))
#endif
#define GEN_SYMNAME(str)	SYM_CHAR #str
#define GEN_VALUE(str)		#str
#define GEN_ABS(name, value)			\
	asm(".globl " GEN_SYMNAME(name));	\
	GEN_SET_VALUE(name, value)

/*
 * Check to see if we are building with a
 * computed CRC.  Otherwise define it as ~0.
 */
#if !defined(ENV_CRC)
#  define ENV_CRC	(~0)
#endif

#define DEFAULT_ENV_INSTANCE_EMBEDDED
#include <env_default.h>

#ifdef CONFIG_ENV_ADDR_REDUND
env_t redundand_environment __UBOOT_ENV_SECTION__ = {
	0,		/* CRC Sum: invalid */
	0,		/* Flags:   invalid */
	{
	"\0"
	}
};
#endif	/* CONFIG_ENV_ADDR_REDUND */

/*
 * These will end up in the .text section
 * if the environment strings are embedded
 * in the image.  When this is used for
 * tools/envcrc, they are placed in the
 * .data/.sdata section.
 *
 */
unsigned long env_size __UBOOT_ENV_SECTION__ = sizeof(env_t);

/*
 * Add in absolutes.
 */
GEN_ABS(env_offset, CONFIG_ENV_OFFSET);

#endif /* ENV_IS_EMBEDDED */
Commit	Line	Data
c609719b WD	1	/*
	2	* (C) Copyright 2001
	3	* Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
	4	*
3765b3e7	5	* SPDX-License-Identifier: GPL-2.0+
c609719b WD	6	*/
c609719b WD	7
f33f3e07 YS	8	#include <linux/kconfig.h>
f33f3e07 YS	9
dc17fb6d	10	#ifndef __ASSEMBLY__
bd2a23ac	11	#define __ASSEMBLY__ /* Dirty trick to get only #defines */
dc17fb6d	12	#endif
bd2a23ac	13	#define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */
c609719b	14	#include <config.h>
dc17fb6d	15	#undef __ASSEMBLY__
c609719b	16	#include <environment.h>
5368c55d	17	#include <linux/stringify.h>
c609719b	18
bd2a23ac	19	/* Handle HOSTS that have prepended crap on symbol names, not TARGETS. */
c609719b WD	20	#if defined(__APPLE__)
	21	/* Leading underscore on symbols */
	22	# define SYM_CHAR "_"
	23	#else /* No leading character on symbols */
	24	# define SYM_CHAR
	25	#endif
	26
a747a7f3 WD	27	/*
	28	* Generate embedded environment table
	29	* inside U-Boot image, if needed.
	30	*/
c3eb3fe4	31	#if defined(ENV_IS_EMBEDDED) \|\| defined(CONFIG_BUILD_ENVCRC)
c609719b	32	/*
7653942b	33	* Put the environment in the .text section when we are building
c609719b	34	* U-Boot proper. The host based program "tools/envcrc" does not need
7653942b	35	* a seperate section.
c609719b	36	*/
7653942b	37	#if defined(USE_HOSTCC) /* Native for 'tools/envcrc' */
eaa90e5d	38	# define __UBOOT_ENV_SECTION__ /XXX DO_NOT_DEL_THIS_COMMENT/
c609719b WD	39
	40	#else /* Environment is embedded in U-Boot's .text section */
	41	/* XXX - This only works with GNU C */
eaa90e5d	42	# define __UBOOT_ENV_SECTION__ __attribute__ ((section(".text")))
c609719b WD	43	#endif
	44
	45	/*
	46	* Macros to generate global absolutes.
	47	*/
4087bc88	48	#if defined(__bfin__)
bd2a23ac IG	49	# define GEN_SET_VALUE(name, value) \
bd2a23ac IG	50	asm(".set " GEN_SYMNAME(name) ", " GEN_VALUE(value))
4087bc88	51	#else
bd2a23ac IG	52	# define GEN_SET_VALUE(name, value) \
	53	asm(GEN_SYMNAME(name) " = " GEN_VALUE(value))
	54	#endif
	55	#define GEN_SYMNAME(str) SYM_CHAR #str
	56	#define GEN_VALUE(str) #str
	57	#define GEN_ABS(name, value) \
	58	asm(".globl " GEN_SYMNAME(name)); \
	59	GEN_SET_VALUE(name, value)
c609719b	60
c609719b WD	61	/*
	62	* Check to see if we are building with a
	63	* computed CRC. Otherwise define it as ~0.
	64	*/
	65	#if !defined(ENV_CRC)
bd2a23ac	66	# define ENV_CRC (~0)
c609719b WD	67	#endif
c609719b WD	68
ddd8418f JH	69	#define DEFAULT_ENV_INSTANCE_EMBEDDED
	70	#include <env_default.h>
	71
0e8d1586	72	#ifdef CONFIG_ENV_ADDR_REDUND
eaa90e5d	73	env_t redundand_environment __UBOOT_ENV_SECTION__ = {
c609719b WD	74	0, /* CRC Sum: invalid */
	75	0, /* Flags: invalid */
	76	{
	77	"\0"
	78	}
	79	};
0e8d1586	80	#endif /* CONFIG_ENV_ADDR_REDUND */
c609719b WD	81
	82	/*
	83	* These will end up in the .text section
	84	* if the environment strings are embedded
	85	* in the image. When this is used for
	86	* tools/envcrc, they are placed in the
	87	* .data/.sdata section.
	88	*
	89	*/
eaa90e5d	90	unsigned long env_size __UBOOT_ENV_SECTION__ = sizeof(env_t);
c609719b WD	91
	92	/*
	93	* Add in absolutes.
	94	*/
0e8d1586	95	GEN_ABS(env_offset, CONFIG_ENV_OFFSET);
a747a7f3 WD	96
a747a7f3 WD	97	#endif /* ENV_IS_EMBEDDED */