rpi.h 4.6 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. #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B)
  10. #define CONFIG_SKIP_LOWLEVEL_INIT
  11. #endif
  12. /* Architecture, CPU, etc.*/
  13. #define CONFIG_ARCH_CPU_INIT
  14. /* Use SoC timer for AArch32, but architected timer for AArch64 */
  15. #ifndef CONFIG_ARM64
  16. #define CONFIG_SYS_TIMER_RATE 1000000
  17. #define CONFIG_SYS_TIMER_COUNTER \
  18. (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo)
  19. #endif
  20. /*
  21. * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
  22. * so 2708 has historically been used rather than a dedicated 2835 ID.
  23. *
  24. * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation
  25. * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
  26. * rather than obtaining a valid ID:-/
  27. *
  28. * For the bcm2837, hopefully a machine type is not needed, since everything
  29. * is DT.
  30. */
  31. #ifdef CONFIG_BCM2835
  32. #define CONFIG_MACH_TYPE MACH_TYPE_BCM2708
  33. #endif
  34. /* Memory layout */
  35. #define CONFIG_NR_DRAM_BANKS 1
  36. #define CONFIG_SYS_SDRAM_BASE 0x00000000
  37. #define CONFIG_SYS_UBOOT_BASE CONFIG_SYS_TEXT_BASE
  38. /*
  39. * The board really has 256M. However, the VC (VideoCore co-processor) shares
  40. * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
  41. * smaller amount of RAM is present in order to avoid stomping on the area
  42. * the VC uses.
  43. */
  44. #define CONFIG_SYS_SDRAM_SIZE SZ_128M
  45. #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \
  46. CONFIG_SYS_SDRAM_SIZE - \
  47. GENERATED_GBL_DATA_SIZE)
  48. #define CONFIG_SYS_MALLOC_LEN SZ_4M
  49. #define CONFIG_SYS_MEMTEST_START 0x00100000
  50. #define CONFIG_SYS_MEMTEST_END 0x00200000
  51. #define CONFIG_LOADADDR 0x00200000
  52. /* Devices */
  53. /* GPIO */
  54. #define CONFIG_BCM2835_GPIO
  55. /* LCD */
  56. #define CONFIG_LCD_DT_SIMPLEFB
  57. #define CONFIG_VIDEO_BCM2835
  58. #ifdef CONFIG_CMD_USB
  59. #define CONFIG_TFTP_TSIZE
  60. #define CONFIG_MISC_INIT_R
  61. #endif
  62. /* Console configuration */
  63. #define CONFIG_SYS_CBSIZE 1024
  64. /* Environment */
  65. #define CONFIG_ENV_SIZE SZ_16K
  66. #define CONFIG_SYS_LOAD_ADDR 0x1000000
  67. #define CONFIG_PREBOOT "usb start"
  68. /* Shell */
  69. /* ATAGs support for bootm/bootz */
  70. #define CONFIG_SETUP_MEMORY_TAGS
  71. #define CONFIG_CMDLINE_TAG
  72. #define CONFIG_INITRD_TAG
  73. /* Environment */
  74. #define ENV_DEVICE_SETTINGS \
  75. "stdin=serial,usbkbd\0" \
  76. "stdout=serial,vidconsole\0" \
  77. "stderr=serial,vidconsole\0"
  78. /*
  79. * Memory layout for where various images get loaded by boot scripts:
  80. *
  81. * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this.
  82. *
  83. * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's
  84. * binary firmware loads a DT to address 0x100, so we choose this address to
  85. * match it. This allows custom boot scripts to pass this DT on to Linux
  86. * simply by not over-writing the data at this address. When using U-Boot,
  87. * U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW
  88. * and loads its own DT from disk (triggered by boot.scr or extlinux.conf).
  89. *
  90. * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
  91. * something else. Put it low in memory to avoid conflicts.
  92. *
  93. * kernel_addr_r must be within the first 128M of RAM in order for the
  94. * kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
  95. * decompress itself to 0x8000 after the start of RAM, kernel_addr_r
  96. * should not overlap that area, or the kernel will have to copy itself
  97. * somewhere else before decompression. Similarly, the address of any other
  98. * data passed to the kernel shouldn't overlap the start of RAM. Pushing
  99. * this up to 16M allows for a sizable kernel to be decompressed below the
  100. * compressed load address.
  101. *
  102. * scriptaddr can be pretty much anywhere that doesn't conflict with something
  103. * else. Choosing 32M allows for the compressed kernel to be up to 16M.
  104. *
  105. * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
  106. * for any boot script to be up to 1M, which is hopefully plenty.
  107. */
  108. #define ENV_MEM_LAYOUT_SETTINGS \
  109. "fdt_high=ffffffff\0" \
  110. "initrd_high=ffffffff\0" \
  111. "fdt_addr_r=0x00000100\0" \
  112. "pxefile_addr_r=0x00100000\0" \
  113. "kernel_addr_r=0x01000000\0" \
  114. "scriptaddr=0x02000000\0" \
  115. "ramdisk_addr_r=0x02100000\0" \
  116. #define BOOT_TARGET_DEVICES(func) \
  117. func(MMC, mmc, 0) \
  118. func(USB, usb, 0) \
  119. func(PXE, pxe, na) \
  120. func(DHCP, dhcp, na)
  121. #include <config_distro_bootcmd.h>
  122. #define CONFIG_EXTRA_ENV_SETTINGS \
  123. "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
  124. ENV_DEVICE_SETTINGS \
  125. ENV_MEM_LAYOUT_SETTINGS \
  126. BOOTENV
  127. #endif