env_embedded.c 5.6 KB

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  1. /*
  2. * (C) Copyright 2001
  3. * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
  4. *
  5. * See file CREDITS for list of people who contributed to this
  6. * project.
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License as
  10. * published by the Free Software Foundation; either version 2 of
  11. * the License, or (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21. * MA 02111-1307 USA
  22. */
  23. #ifndef __ASSEMBLY__
  24. #define __ASSEMBLY__ /* Dirty trick to get only #defines */
  25. #endif
  26. #define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */
  27. #include <config.h>
  28. #undef __ASSEMBLY__
  29. #include <environment.h>
  30. /*
  31. * Handle HOSTS that have prepended
  32. * crap on symbol names, not TARGETS.
  33. */
  34. #if defined(__APPLE__)
  35. /* Leading underscore on symbols */
  36. # define SYM_CHAR "_"
  37. #else /* No leading character on symbols */
  38. # define SYM_CHAR
  39. #endif
  40. /*
  41. * Only put the environment in it's own section when we are building
  42. * U-Boot proper. The host based program "tools/envcrc" does not need
  43. * a seperate section. Note that ENV_CRC is only defined when building
  44. * U-Boot itself.
  45. */
  46. #if (defined(CONFIG_SYS_USE_PPCENV) || defined(CONFIG_NAND_U_BOOT)) && \
  47. defined(ENV_CRC) /* Environment embedded in U-Boot .ppcenv section */
  48. /* XXX - This only works with GNU C */
  49. # define __PPCENV__ __attribute__ ((section(".ppcenv")))
  50. # define __PPCTEXT__ __attribute__ ((section(".text")))
  51. #elif defined(USE_HOSTCC) /* Native for 'tools/envcrc' */
  52. # define __PPCENV__ /*XXX DO_NOT_DEL_THIS_COMMENT*/
  53. # define __PPCTEXT__ /*XXX DO_NOT_DEL_THIS_COMMENT*/
  54. #else /* Environment is embedded in U-Boot's .text section */
  55. /* XXX - This only works with GNU C */
  56. # define __PPCENV__ __attribute__ ((section(".text")))
  57. # define __PPCTEXT__ __attribute__ ((section(".text")))
  58. #endif
  59. /*
  60. * Macros to generate global absolutes.
  61. */
  62. #if defined(__bfin__)
  63. # define GEN_SET_VALUE(name, value) asm (".set " GEN_SYMNAME(name) ", " GEN_VALUE(value))
  64. #else
  65. # define GEN_SET_VALUE(name, value) asm (GEN_SYMNAME(name) " = " GEN_VALUE(value))
  66. #endif
  67. #define GEN_SYMNAME(str) SYM_CHAR #str
  68. #define GEN_VALUE(str) #str
  69. #define GEN_ABS(name, value) \
  70. asm (".globl " GEN_SYMNAME(name)); \
  71. GEN_SET_VALUE(name, value)
  72. /*
  73. * Macros to transform values
  74. * into environment strings.
  75. */
  76. #define XMK_STR(x) #x
  77. #define MK_STR(x) XMK_STR(x)
  78. /*
  79. * Check to see if we are building with a
  80. * computed CRC. Otherwise define it as ~0.
  81. */
  82. #if !defined(ENV_CRC)
  83. # define ENV_CRC ~0
  84. #endif
  85. env_t environment __PPCENV__ = {
  86. ENV_CRC, /* CRC Sum */
  87. #ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
  88. 1, /* Flags: valid */
  89. #endif
  90. {
  91. #if defined(CONFIG_BOOTARGS)
  92. "bootargs=" CONFIG_BOOTARGS "\0"
  93. #endif
  94. #if defined(CONFIG_BOOTCOMMAND)
  95. "bootcmd=" CONFIG_BOOTCOMMAND "\0"
  96. #endif
  97. #if defined(CONFIG_RAMBOOTCOMMAND)
  98. "ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
  99. #endif
  100. #if defined(CONFIG_NFSBOOTCOMMAND)
  101. "nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
  102. #endif
  103. #if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
  104. "bootdelay=" MK_STR(CONFIG_BOOTDELAY) "\0"
  105. #endif
  106. #if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
  107. "baudrate=" MK_STR(CONFIG_BAUDRATE) "\0"
  108. #endif
  109. #ifdef CONFIG_LOADS_ECHO
  110. "loads_echo=" MK_STR(CONFIG_LOADS_ECHO) "\0"
  111. #endif
  112. #ifdef CONFIG_ETHADDR
  113. "ethaddr=" MK_STR(CONFIG_ETHADDR) "\0"
  114. #endif
  115. #ifdef CONFIG_ETH1ADDR
  116. "eth1addr=" MK_STR(CONFIG_ETH1ADDR) "\0"
  117. #endif
  118. #ifdef CONFIG_ETH2ADDR
  119. "eth2addr=" MK_STR(CONFIG_ETH2ADDR) "\0"
  120. #endif
  121. #ifdef CONFIG_ETH3ADDR
  122. "eth3addr=" MK_STR(CONFIG_ETH3ADDR) "\0"
  123. #endif
  124. #ifdef CONFIG_ETH4ADDR
  125. "eth4addr=" MK_STR(CONFIG_ETH4ADDR) "\0"
  126. #endif
  127. #ifdef CONFIG_ETH5ADDR
  128. "eth5addr=" MK_STR(CONFIG_ETH5ADDR) "\0"
  129. #endif
  130. #ifdef CONFIG_ETHPRIME
  131. "ethprime=" CONFIG_ETHPRIME "\0"
  132. #endif
  133. #ifdef CONFIG_IPADDR
  134. "ipaddr=" MK_STR(CONFIG_IPADDR) "\0"
  135. #endif
  136. #ifdef CONFIG_SERVERIP
  137. "serverip=" MK_STR(CONFIG_SERVERIP) "\0"
  138. #endif
  139. #ifdef CONFIG_SYS_AUTOLOAD
  140. "autoload=" CONFIG_SYS_AUTOLOAD "\0"
  141. #endif
  142. #ifdef CONFIG_ROOTPATH
  143. "rootpath=" MK_STR(CONFIG_ROOTPATH) "\0"
  144. #endif
  145. #ifdef CONFIG_GATEWAYIP
  146. "gatewayip=" MK_STR(CONFIG_GATEWAYIP) "\0"
  147. #endif
  148. #ifdef CONFIG_NETMASK
  149. "netmask=" MK_STR(CONFIG_NETMASK) "\0"
  150. #endif
  151. #ifdef CONFIG_HOSTNAME
  152. "hostname=" MK_STR(CONFIG_HOSTNAME) "\0"
  153. #endif
  154. #ifdef CONFIG_BOOTFILE
  155. "bootfile=" MK_STR(CONFIG_BOOTFILE) "\0"
  156. #endif
  157. #ifdef CONFIG_LOADADDR
  158. "loadaddr=" MK_STR(CONFIG_LOADADDR) "\0"
  159. #endif
  160. #ifdef CONFIG_PREBOOT
  161. "preboot=" CONFIG_PREBOOT "\0"
  162. #endif
  163. #ifdef CONFIG_CLOCKS_IN_MHZ
  164. "clocks_in_mhz=" "1" "\0"
  165. #endif
  166. #if defined(CONFIG_PCI_BOOTDELAY) && (CONFIG_PCI_BOOTDELAY > 0)
  167. "pcidelay=" MK_STR(CONFIG_PCI_BOOTDELAY) "\0"
  168. #endif
  169. #ifdef CONFIG_EXTRA_ENV_SETTINGS
  170. CONFIG_EXTRA_ENV_SETTINGS
  171. #endif
  172. "\0" /* Term. env_t.data with 2 NULs */
  173. }
  174. };
  175. #ifdef CONFIG_ENV_ADDR_REDUND
  176. env_t redundand_environment __PPCENV__ = {
  177. 0, /* CRC Sum: invalid */
  178. 0, /* Flags: invalid */
  179. {
  180. "\0"
  181. }
  182. };
  183. #endif /* CONFIG_ENV_ADDR_REDUND */
  184. /*
  185. * These will end up in the .text section
  186. * if the environment strings are embedded
  187. * in the image. When this is used for
  188. * tools/envcrc, they are placed in the
  189. * .data/.sdata section.
  190. *
  191. */
  192. unsigned long env_size __PPCTEXT__ = sizeof(env_t);
  193. /*
  194. * Add in absolutes.
  195. */
  196. GEN_ABS(env_offset, CONFIG_ENV_OFFSET);