include/configs/rpi.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * (C) Copyright 2012-2016 Stephen Warren
   4  */
   5
   6 #ifndef __CONFIG_H
   7 #define __CONFIG_H
   8
   9 #include <linux/sizes.h>
  10 #include <asm/arch/timer.h>
  11
  12 #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B)
  13 #define CONFIG_SKIP_LOWLEVEL_INIT
  14 #endif
  15
  16 /* Architecture, CPU, etc.*/
  17 #define CONFIG_ARCH_CPU_INIT
  18
  19 /* Use SoC timer for AArch32, but architected timer for AArch64 */
  20 #ifndef CONFIG_ARM64
  21 #define CONFIG_SYS_TIMER_RATE           1000000
  22 #define CONFIG_SYS_TIMER_COUNTER        \
  23         (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo)
  24 #endif
  25
  26 /*
  27  * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
  28  * so 2708 has historically been used rather than a dedicated 2835 ID.
  29  *
  30  * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation
  31  * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
  32  * rather than obtaining a valid ID:-/
  33  *
  34  * For the bcm2837, hopefully a machine type is not needed, since everything
  35  * is DT.
  36  */
  37 #ifdef CONFIG_BCM2835
  38 #define CONFIG_MACH_TYPE                MACH_TYPE_BCM2708
  39 #endif
  40
  41 /* Memory layout */
  42 #define CONFIG_NR_DRAM_BANKS            1
  43 #define CONFIG_SYS_SDRAM_BASE           0x00000000
  44 #define CONFIG_SYS_UBOOT_BASE           CONFIG_SYS_TEXT_BASE
  45 /*
  46  * The board really has 256M. However, the VC (VideoCore co-processor) shares
  47  * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
  48  * smaller amount of RAM is present in order to avoid stomping on the area
  49  * the VC uses.
  50  */
  51 #define CONFIG_SYS_SDRAM_SIZE           SZ_128M
  52 #define CONFIG_SYS_INIT_SP_ADDR         (CONFIG_SYS_SDRAM_BASE + \
  53                                          CONFIG_SYS_SDRAM_SIZE - \
  54                                          GENERATED_GBL_DATA_SIZE)
  55 #define CONFIG_SYS_MALLOC_LEN           SZ_4M
  56 #define CONFIG_SYS_MEMTEST_START        0x00100000
  57 #define CONFIG_SYS_MEMTEST_END          0x00200000
  58 #define CONFIG_LOADADDR                 0x00200000
  59
  60 /* Devices */
  61 /* GPIO */
  62 #define CONFIG_BCM2835_GPIO
  63 /* LCD */
  64 #define CONFIG_LCD_DT_SIMPLEFB
  65 #define CONFIG_VIDEO_BCM2835
  66
  67 #ifdef CONFIG_CMD_USB
  68 #define CONFIG_TFTP_TSIZE
  69 #define CONFIG_MISC_INIT_R
  70 #endif
  71
  72 /* Console configuration */
  73 #define CONFIG_SYS_CBSIZE               1024
  74
  75 /* Environment */
  76 #define CONFIG_ENV_SIZE                 SZ_16K
  77 #define CONFIG_SYS_LOAD_ADDR            0x1000000
  78 #define CONFIG_PREBOOT                  "usb start"
  79
  80 /* Shell */
  81
  82 /* ATAGs support for bootm/bootz */
  83 #define CONFIG_SETUP_MEMORY_TAGS
  84 #define CONFIG_CMDLINE_TAG
  85 #define CONFIG_INITRD_TAG
  86
  87 /* Environment */
  88 #define ENV_DEVICE_SETTINGS \
  89         "stdin=serial,usbkbd\0" \
  90         "stdout=serial,vidconsole\0" \
  91         "stderr=serial,vidconsole\0"
  92
  93 /*
  94  * Memory layout for where various images get loaded by boot scripts:
  95  *
  96  * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this.
  97  *
  98  * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's
  99  *   binary firmware loads a DT to address 0x100, so we choose this address to
 100  *   match it. This allows custom boot scripts to pass this DT on to Linux
 101  *   simply by not over-writing the data at this address. When using U-Boot,
 102  *   U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW
 103  *   and loads its own DT from disk (triggered by boot.scr or extlinux.conf).
 104  *
 105  * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
 106  *   something else. Put it low in memory to avoid conflicts.
 107  *
 108  * kernel_addr_r must be within the first 128M of RAM in order for the
 109  *   kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
 110  *   decompress itself to 0x8000 after the start of RAM, kernel_addr_r
 111  *   should not overlap that area, or the kernel will have to copy itself
 112  *   somewhere else before decompression. Similarly, the address of any other
 113  *   data passed to the kernel shouldn't overlap the start of RAM. Pushing
 114  *   this up to 16M allows for a sizable kernel to be decompressed below the
 115  *   compressed load address.
 116  *
 117  * scriptaddr can be pretty much anywhere that doesn't conflict with something
 118  *   else. Choosing 32M allows for the compressed kernel to be up to 16M.
 119  *
 120  * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
 121  *   for any boot script to be up to 1M, which is hopefully plenty.
 122  */
 123 #define ENV_MEM_LAYOUT_SETTINGS \
 124         "fdt_high=ffffffff\0" \
 125         "initrd_high=ffffffff\0" \
 126         "fdt_addr_r=0x00000100\0" \
 127         "pxefile_addr_r=0x00100000\0" \
 128         "kernel_addr_r=0x01000000\0" \
 129         "scriptaddr=0x02000000\0" \
 130         "ramdisk_addr_r=0x02100000\0" \
 131
 132 #define BOOT_TARGET_DEVICES(func) \
 133         func(MMC, mmc, 0) \
 134         func(USB, usb, 0) \
 135         func(PXE, pxe, na) \
 136         func(DHCP, dhcp, na)
 137 #include <config_distro_bootcmd.h>
 138
 139 #define CONFIG_EXTRA_ENV_SETTINGS \
 140         "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
 141         ENV_DEVICE_SETTINGS \
 142         ENV_MEM_LAYOUT_SETTINGS \
 143         BOOTENV
 144
 145
 146 #endif