LXR uboot/env/embedded.c

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