rpi.h 6.3 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * (C) Copyright 2012-2016 Stephen Warren
  4. */
  5. #ifndef __CONFIG_H
  6. #define __CONFIG_H
  7. #include <linux/sizes.h>
  8. #include <asm/arch/timer.h>
  9. #ifndef __ASSEMBLY__
  10. #include <asm/arch/base.h>
  11. #endif
  12. #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B)
  13. #define CONFIG_SKIP_LOWLEVEL_INIT
  14. #endif
  15. /* Architecture, CPU, etc.*/
  16. /* Use SoC timer for AArch32, but architected timer for AArch64 */
  17. #ifndef CONFIG_ARM64
  18. #define CONFIG_SYS_TIMER_RATE 1000000
  19. #define CONFIG_SYS_TIMER_COUNTER \
  20. (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo)
  21. #endif
  22. /*
  23. * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
  24. * so 2708 has historically been used rather than a dedicated 2835 ID.
  25. *
  26. * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation
  27. * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
  28. * rather than obtaining a valid ID:-/
  29. *
  30. * For the bcm2837, hopefully a machine type is not needed, since everything
  31. * is DT.
  32. */
  33. #ifdef CONFIG_BCM2835
  34. #define CONFIG_MACH_TYPE MACH_TYPE_BCM2708
  35. #endif
  36. /* Memory layout */
  37. #define CONFIG_SYS_SDRAM_BASE 0x00000000
  38. #define CONFIG_SYS_UBOOT_BASE CONFIG_SYS_TEXT_BASE
  39. /*
  40. * The board really has 256M. However, the VC (VideoCore co-processor) shares
  41. * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
  42. * smaller amount of RAM is present in order to avoid stomping on the area
  43. * the VC uses.
  44. */
  45. #define CONFIG_SYS_SDRAM_SIZE SZ_128M
  46. #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \
  47. CONFIG_SYS_SDRAM_SIZE - \
  48. GENERATED_GBL_DATA_SIZE)
  49. #define CONFIG_SYS_MALLOC_LEN SZ_4M
  50. #define CONFIG_LOADADDR 0x00200000
  51. #ifdef CONFIG_ARM64
  52. #define CONFIG_SYS_BOOTM_LEN SZ_64M
  53. #endif
  54. /* Devices */
  55. /* GPIO */
  56. #define CONFIG_BCM2835_GPIO
  57. /* LCD */
  58. #define CONFIG_LCD_DT_SIMPLEFB
  59. #define CONFIG_VIDEO_BCM2835
  60. /* DFU over USB/UDC */
  61. #ifdef CONFIG_CMD_DFU
  62. #define CONFIG_SYS_DFU_DATA_BUF_SIZE SZ_1M
  63. #define CONFIG_SYS_DFU_MAX_FILE_SIZE SZ_2M
  64. #ifdef CONFIG_ARM64
  65. #define KERNEL_FILENAME "Image"
  66. #else
  67. #define KERNEL_FILENAME "zImage"
  68. #endif
  69. #define ENV_DFU_SETTINGS \
  70. "dfu_alt_info=u-boot.bin fat 0 1;uboot.env fat 0 1;" \
  71. "config.txt fat 0 1;" \
  72. KERNEL_FILENAME " fat 0 1\0"
  73. #else
  74. #define ENV_DFU_SETTINGS ""
  75. #endif
  76. /* Console configuration */
  77. #define CONFIG_SYS_CBSIZE 1024
  78. /* Environment */
  79. #define CONFIG_SYS_LOAD_ADDR 0x1000000
  80. /* Shell */
  81. /* ATAGs support for bootm/bootz */
  82. #define CONFIG_SETUP_MEMORY_TAGS
  83. #define CONFIG_CMDLINE_TAG
  84. #define CONFIG_INITRD_TAG
  85. /* Environment */
  86. #define ENV_DEVICE_SETTINGS \
  87. "stdin=serial,usbkbd\0" \
  88. "stdout=serial,vidconsole\0" \
  89. "stderr=serial,vidconsole\0"
  90. #ifdef CONFIG_ARM64
  91. #define FDT_HIGH "ffffffffffffffff"
  92. #define INITRD_HIGH "ffffffffffffffff"
  93. #else
  94. #define FDT_HIGH "ffffffff"
  95. #define INITRD_HIGH "ffffffff"
  96. #endif
  97. /*
  98. * Memory layout for where various images get loaded by boot scripts:
  99. *
  100. * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this.
  101. *
  102. * Older versions of the boot firmware place the firmware-loaded DTB at 0x100,
  103. * newer versions place it in high memory. So prevent U-Boot from doing its own
  104. * DTB + initrd relocation so that we won't accidentally relocate the initrd
  105. * over the firmware-loaded DTB and generally try to lay out things starting
  106. * from the bottom of RAM.
  107. *
  108. * kernel_addr_r has different constraints on ARM and Aarch64. For 32-bit ARM,
  109. * it must be within the first 128M of RAM in order for the kernel's
  110. * CONFIG_AUTO_ZRELADDR option to work. The kernel itself will be decompressed
  111. * to 0x8000 but the decompressor clobbers 0x4000-0x8000 as well. The
  112. * decompressor also likes to relocate itself to right past the end of the
  113. * decompressed kernel, so in total the sum of the compressed and and
  114. * decompressed kernel needs to be reserved.
  115. *
  116. * For Aarch64, the kernel image is uncompressed and must be loaded at
  117. * text_offset bytes (specified in the header of the Image) into a 2MB
  118. * boundary. The 'booti' command relocates the image if necessary. Linux uses
  119. * a default text_offset of 0x80000. In summary, loading at 0x80000
  120. * satisfies all these constraints and reserving memory up to 0x02400000
  121. * permits fairly large (roughly 36M) kernels.
  122. *
  123. * scriptaddr and pxefile_addr_r can be pretty much anywhere that doesn't
  124. * conflict with something else. Reserving 1M for each of them at
  125. * 0x02400000-0x02500000 and 0x02500000-0x02600000 should be plenty.
  126. *
  127. * On ARM, both the DTB and any possible initrd must be loaded such that they
  128. * fit inside the lowmem mapping in Linux. In practice, this usually means not
  129. * more than ~700M away from the start of the kernel image but this number can
  130. * be larger OR smaller depending on e.g. the 'vmalloc=xxxM' command line
  131. * parameter given to the kernel. So reserving memory from low to high
  132. * satisfies this constraint again. Reserving 1M at 0x02600000-0x02700000 for
  133. * the DTB leaves rest of the free RAM to the initrd starting at 0x02700000.
  134. * Even with the smallest possible CPU-GPU memory split of the CPU getting
  135. * only 64M, the remaining 25M starting at 0x02700000 should allow quite
  136. * large initrds before they start colliding with U-Boot.
  137. */
  138. #define ENV_MEM_LAYOUT_SETTINGS \
  139. "fdt_high=" FDT_HIGH "\0" \
  140. "initrd_high=" INITRD_HIGH "\0" \
  141. "kernel_addr_r=0x00080000\0" \
  142. "scriptaddr=0x02400000\0" \
  143. "pxefile_addr_r=0x02500000\0" \
  144. "fdt_addr_r=0x02600000\0" \
  145. "ramdisk_addr_r=0x02700000\0"
  146. #if CONFIG_IS_ENABLED(CMD_MMC)
  147. #define BOOT_TARGET_MMC(func) \
  148. func(MMC, mmc, 0) \
  149. func(MMC, mmc, 1)
  150. #else
  151. #define BOOT_TARGET_MMC(func)
  152. #endif
  153. #if CONFIG_IS_ENABLED(CMD_USB)
  154. #define BOOT_TARGET_USB(func) func(USB, usb, 0)
  155. #else
  156. #define BOOT_TARGET_USB(func)
  157. #endif
  158. #if CONFIG_IS_ENABLED(CMD_PXE)
  159. #define BOOT_TARGET_PXE(func) func(PXE, pxe, na)
  160. #else
  161. #define BOOT_TARGET_PXE(func)
  162. #endif
  163. #if CONFIG_IS_ENABLED(CMD_DHCP)
  164. #define BOOT_TARGET_DHCP(func) func(DHCP, dhcp, na)
  165. #else
  166. #define BOOT_TARGET_DHCP(func)
  167. #endif
  168. #define BOOT_TARGET_DEVICES(func) \
  169. BOOT_TARGET_MMC(func) \
  170. BOOT_TARGET_USB(func) \
  171. BOOT_TARGET_PXE(func) \
  172. BOOT_TARGET_DHCP(func)
  173. #include <config_distro_bootcmd.h>
  174. #define CONFIG_EXTRA_ENV_SETTINGS \
  175. "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
  176. ENV_DEVICE_SETTINGS \
  177. ENV_DFU_SETTINGS \
  178. ENV_MEM_LAYOUT_SETTINGS \
  179. BOOTENV
  180. #endif