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common/env_embedded.c
2.74 KB
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/* * (C) Copyright 2001 * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com. * |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#ifndef __ASSEMBLY__ |
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#define __ASSEMBLY__ /* Dirty trick to get only #defines */ |
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#endif |
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#define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */ |
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#include <config.h> |
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#undef __ASSEMBLY__ |
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#include <environment.h> |
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#include <linux/stringify.h> |
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/* Handle HOSTS that have prepended crap on symbol names, not TARGETS. */ |
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#if defined(__APPLE__) /* Leading underscore on symbols */ # define SYM_CHAR "_" #else /* No leading character on symbols */ # define SYM_CHAR #endif /* |
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* Generate embedded environment table * inside U-Boot image, if needed. */ |
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#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_BUILD_ENVCRC) |
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/* |
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* 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. */ |
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#if defined(CONFIG_SYS_USE_PPCENV) && \ |
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defined(ENV_CRC) /* Environment embedded in U-Boot .ppcenv section */ |
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/* XXX - This only works with GNU C */ |
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# define __PPCENV__ __attribute__ ((section(".ppcenv"))) # define __PPCTEXT__ __attribute__ ((section(".text"))) |
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#elif defined(USE_HOSTCC) /* Native for 'tools/envcrc' */ |
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# define __PPCENV__ /*XXX DO_NOT_DEL_THIS_COMMENT*/ # define __PPCTEXT__ /*XXX DO_NOT_DEL_THIS_COMMENT*/ |
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#else /* Environment is embedded in U-Boot's .text section */ /* XXX - This only works with GNU C */ |
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# define __PPCENV__ __attribute__ ((section(".text"))) # define __PPCTEXT__ __attribute__ ((section(".text"))) |
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#endif /* * Macros to generate global absolutes. */ |
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#if defined(__bfin__) |
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# define GEN_SET_VALUE(name, value) \ asm(".set " GEN_SYMNAME(name) ", " GEN_VALUE(value)) |
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#else |
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# 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) |
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/* |
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* Check to see if we are building with a * computed CRC. Otherwise define it as ~0. */ #if !defined(ENV_CRC) |
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# define ENV_CRC (~0) |
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#endif |
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#define DEFAULT_ENV_INSTANCE_EMBEDDED #include <env_default.h> |
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#ifdef CONFIG_ENV_ADDR_REDUND |
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env_t redundand_environment __PPCENV__ = { 0, /* CRC Sum: invalid */ 0, /* Flags: invalid */ { "\0" } }; |
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#endif /* CONFIG_ENV_ADDR_REDUND */ |
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/* * 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. */ |
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GEN_ABS(env_offset, CONFIG_ENV_OFFSET); |
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#endif /* ENV_IS_EMBEDDED */ |