env_embedded.c
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/*
* (C) Copyright 2001
* Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#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)
/*
* Only put the environment in it's own section when we are building
* U-Boot proper. The host based program "tools/envcrc" does not need
* a seperate section. Note that ENV_CRC is only defined when building
* U-Boot itself.
*/
#if defined(CONFIG_SYS_USE_PPCENV) && \
defined(ENV_CRC) /* Environment embedded in U-Boot .ppcenv section */
/* XXX - This only works with GNU C */
# define __PPCENV__ __attribute__ ((section(".ppcenv")))
# define __PPCTEXT__ __attribute__ ((section(".text")))
#elif defined(USE_HOSTCC) /* Native for 'tools/envcrc' */
# define __PPCENV__ /*XXX DO_NOT_DEL_THIS_COMMENT*/
# define __PPCTEXT__ /*XXX DO_NOT_DEL_THIS_COMMENT*/
#else /* Environment is embedded in U-Boot's .text section */
/* XXX - This only works with GNU C */
# define __PPCENV__ __attribute__ ((section(".text")))
# define __PPCTEXT__ __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 __PPCENV__ = {
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 __PPCTEXT__ = sizeof(env_t);
/*
* Add in absolutes.
*/
GEN_ABS(env_offset, CONFIG_ENV_OFFSET);
#endif /* ENV_IS_EMBEDDED */