include/configs/rpi.h

   1 /*
   2  * (C) Copyright 2012-2016 Stephen Warren
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6
   7 #ifndef __CONFIG_H
   8 #define __CONFIG_H
   9
  10 #include <linux/sizes.h>
  11 #include <asm/arch/timer.h>
  12
  13 #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B)
  14 #define CONFIG_SKIP_LOWLEVEL_INIT
  15 #endif
  16
  17 /* Architecture, CPU, etc.*/
  18 #define CONFIG_ARCH_CPU_INIT
  19
  20 /* Use SoC timer for AArch32, but architected timer for AArch64 */
  21 #ifndef CONFIG_ARM64
  22 #define CONFIG_SYS_TIMER_RATE           1000000
  23 #define CONFIG_SYS_TIMER_COUNTER        \
  24         (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo)
  25 #endif
  26
  27 /*
  28  * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
  29  * so 2708 has historically been used rather than a dedicated 2835 ID.
  30  *
  31  * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation
  32  * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
  33  * rather than obtaining a valid ID:-/
  34  *
  35  * For the bcm2837, hopefully a machine type is not needed, since everything
  36  * is DT.
  37  */
  38 #ifdef CONFIG_BCM2835
  39 #define CONFIG_MACH_TYPE                MACH_TYPE_BCM2708
  40 #endif
  41
  42 /* Memory layout */
  43 #define CONFIG_NR_DRAM_BANKS            1
  44 #define CONFIG_SYS_SDRAM_BASE           0x00000000
  45 #define CONFIG_SYS_UBOOT_BASE           CONFIG_SYS_TEXT_BASE
  46 /*
  47  * The board really has 256M. However, the VC (VideoCore co-processor) shares
  48  * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
  49  * smaller amount of RAM is present in order to avoid stomping on the area
  50  * the VC uses.
  51  */
  52 #define CONFIG_SYS_SDRAM_SIZE           SZ_128M
  53 #define CONFIG_SYS_INIT_SP_ADDR         (CONFIG_SYS_SDRAM_BASE + \
  54                                          CONFIG_SYS_SDRAM_SIZE - \
  55                                          GENERATED_GBL_DATA_SIZE)
  56 #define CONFIG_SYS_MALLOC_LEN           SZ_4M
  57 #define CONFIG_SYS_MEMTEST_START        0x00100000
  58 #define CONFIG_SYS_MEMTEST_END          0x00200000
  59 #define CONFIG_LOADADDR                 0x00200000
  60
  61 /* Devices */
  62 /* GPIO */
  63 #define CONFIG_BCM2835_GPIO
  64 /* LCD */
  65 #define CONFIG_LCD_DT_SIMPLEFB
  66 #define CONFIG_VIDEO_BCM2835
  67
  68 #ifdef CONFIG_CMD_USB
  69 #define CONFIG_TFTP_TSIZE
  70 #define CONFIG_MISC_INIT_R
  71 #endif
  72
  73 /* Console configuration */
  74 #define CONFIG_SYS_CBSIZE               1024
  75
  76 /* Environment */
  77 #define CONFIG_ENV_SIZE                 SZ_16K
  78 #define CONFIG_SYS_LOAD_ADDR            0x1000000
  79 #define CONFIG_PREBOOT                  "usb start"
  80
  81 /* Shell */
  82
  83 /* ATAGs support for bootm/bootz */
  84 #define CONFIG_SETUP_MEMORY_TAGS
  85 #define CONFIG_CMDLINE_TAG
  86 #define CONFIG_INITRD_TAG
  87
  88 #include <config_distro_defaults.h>
  89
  90 /* Environment */
  91 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
  92 #define ENV_DEVICE_SETTINGS \
  93         "stdin=serial,usbkbd\0" \
  94         "stdout=serial,vidconsole\0" \
  95         "stderr=serial,vidconsole\0"
  96
  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  * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's
 103  *   binary firmware loads a DT to address 0x100, so we choose this address to
 104  *   match it. This allows custom boot scripts to pass this DT on to Linux
 105  *   simply by not over-writing the data at this address. When using U-Boot,
 106  *   U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW
 107  *   and loads its own DT from disk (triggered by boot.scr or extlinux.conf).
 108  *
 109  * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
 110  *   something else. Put it low in memory to avoid conflicts.
 111  *
 112  * kernel_addr_r must be within the first 128M of RAM in order for the
 113  *   kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
 114  *   decompress itself to 0x8000 after the start of RAM, kernel_addr_r
 115  *   should not overlap that area, or the kernel will have to copy itself
 116  *   somewhere else before decompression. Similarly, the address of any other
 117  *   data passed to the kernel shouldn't overlap the start of RAM. Pushing
 118  *   this up to 16M allows for a sizable kernel to be decompressed below the
 119  *   compressed load address.
 120  *
 121  * scriptaddr can be pretty much anywhere that doesn't conflict with something
 122  *   else. Choosing 32M allows for the compressed kernel to be up to 16M.
 123  *
 124  * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
 125  *   for any boot script to be up to 1M, which is hopefully plenty.
 126  */
 127 #define ENV_MEM_LAYOUT_SETTINGS \
 128         "fdt_high=ffffffff\0" \
 129         "initrd_high=ffffffff\0" \
 130         "fdt_addr_r=0x00000100\0" \
 131         "pxefile_addr_r=0x00100000\0" \
 132         "kernel_addr_r=0x01000000\0" \
 133         "scriptaddr=0x02000000\0" \
 134         "ramdisk_addr_r=0x02100000\0" \
 135
 136 #define BOOT_TARGET_DEVICES(func) \
 137         func(MMC, mmc, 0) \
 138         func(USB, usb, 0) \
 139         func(PXE, pxe, na) \
 140         func(DHCP, dhcp, na)
 141 #include <config_distro_bootcmd.h>
 142
 143 #define CONFIG_EXTRA_ENV_SETTINGS \
 144         "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
 145         ENV_DEVICE_SETTINGS \
 146         ENV_MEM_LAYOUT_SETTINGS \
 147         BOOTENV
 148
 149
 150 #endif