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 #ifndef __ASSEMBLY__
  13 #include <asm/arch/base.h>
  14 #endif
  15
  16 #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B)
  17 #define CONFIG_SKIP_LOWLEVEL_INIT
  18 #endif
  19
  20 /* Architecture, CPU, etc.*/
  21
  22 /* Use SoC timer for AArch32, but architected timer for AArch64 */
  23 #ifndef CONFIG_ARM64
  24 #define CONFIG_SYS_TIMER_RATE           1000000
  25 #define CONFIG_SYS_TIMER_COUNTER        \
  26         (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo)
  27 #endif
  28
  29 /*
  30  * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
  31  * so 2708 has historically been used rather than a dedicated 2835 ID.
  32  *
  33  * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation
  34  * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
  35  * rather than obtaining a valid ID:-/
  36  *
  37  * For the bcm2837, hopefully a machine type is not needed, since everything
  38  * is DT.
  39  */
  40 #ifdef CONFIG_BCM2835
  41 #define CONFIG_MACH_TYPE                MACH_TYPE_BCM2708
  42 #endif
  43
  44 /* Memory layout */
  45 #define CONFIG_SYS_SDRAM_BASE           0x00000000
  46 #define CONFIG_SYS_UBOOT_BASE           CONFIG_SYS_TEXT_BASE
  47 /*
  48  * The board really has 256M. However, the VC (VideoCore co-processor) shares
  49  * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
  50  * smaller amount of RAM is present in order to avoid stomping on the area
  51  * the VC uses.
  52  */
  53 #define CONFIG_SYS_SDRAM_SIZE           SZ_128M
  54 #define CONFIG_SYS_INIT_SP_ADDR         (CONFIG_SYS_SDRAM_BASE + \
  55                                          CONFIG_SYS_SDRAM_SIZE - \
  56                                          GENERATED_GBL_DATA_SIZE)
  57 #define CONFIG_SYS_MALLOC_LEN           SZ_4M
  58 #define CONFIG_SYS_MEMTEST_START        0x00100000
  59 #define CONFIG_SYS_MEMTEST_END          0x00200000
  60 #define CONFIG_LOADADDR                 0x00200000
  61
  62 #ifdef CONFIG_ARM64
  63 #define CONFIG_SYS_BOOTM_LEN            SZ_64M
  64 #endif
  65
  66 /* Devices */
  67 /* GPIO */
  68 #define CONFIG_BCM2835_GPIO
  69 /* LCD */
  70 #define CONFIG_LCD_DT_SIMPLEFB
  71 #define CONFIG_VIDEO_BCM2835
  72
  73 #ifdef CONFIG_CMD_USB
  74 #define CONFIG_TFTP_TSIZE
  75 #endif
  76
  77 /* DFU over USB/UDC */
  78 #ifdef CONFIG_CMD_DFU
  79 #define CONFIG_SYS_DFU_DATA_BUF_SIZE    SZ_1M
  80 #define CONFIG_SYS_DFU_MAX_FILE_SIZE    SZ_2M
  81
  82 #ifdef CONFIG_ARM64
  83 #define KERNEL_FILENAME         "Image"
  84 #else
  85 #define KERNEL_FILENAME         "zImage"
  86 #endif
  87
  88 #define ENV_DFU_SETTINGS \
  89         "dfu_alt_info=u-boot.bin fat 0 1;uboot.env fat 0 1;" \
  90                       "config.txt fat 0 1;" \
  91                       KERNEL_FILENAME " fat 0 1\0"
  92 #else
  93 #define ENV_DFU_SETTINGS ""
  94 #endif
  95
  96 /* Console configuration */
  97 #define CONFIG_SYS_CBSIZE               1024
  98
  99 /* Environment */
 100 #define CONFIG_SYS_LOAD_ADDR            0x1000000
 101
 102 /* Shell */
 103
 104 /* ATAGs support for bootm/bootz */
 105 #define CONFIG_SETUP_MEMORY_TAGS
 106 #define CONFIG_CMDLINE_TAG
 107 #define CONFIG_INITRD_TAG
 108
 109 /* Environment */
 110 #define ENV_DEVICE_SETTINGS \
 111         "stdin=serial,usbkbd\0" \
 112         "stdout=serial,vidconsole\0" \
 113         "stderr=serial,vidconsole\0"
 114
 115 #ifdef CONFIG_ARM64
 116 #define FDT_HIGH "ffffffffffffffff"
 117 #define INITRD_HIGH "ffffffffffffffff"
 118 #else
 119 #define FDT_HIGH "ffffffff"
 120 #define INITRD_HIGH "ffffffff"
 121 #endif
 122
 123 /*
 124  * Memory layout for where various images get loaded by boot scripts:
 125  *
 126  * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this.
 127  *
 128  * Older versions of the boot firmware place the firmware-loaded DTB at 0x100,
 129  * newer versions place it in high memory. So prevent U-Boot from doing its own
 130  * DTB + initrd relocation so that we won't accidentally relocate the initrd
 131  * over the firmware-loaded DTB and generally try to lay out things starting
 132  * from the bottom of RAM.
 133  *
 134  * kernel_addr_r has different constraints on ARM and Aarch64.  For 32-bit ARM,
 135  * it must be within the first 128M of RAM in order for the kernel's
 136  * CONFIG_AUTO_ZRELADDR option to work. The kernel itself will be decompressed
 137  * to 0x8000 but the decompressor clobbers 0x4000-0x8000 as well. The
 138  * decompressor also likes to relocate itself to right past the end of the
 139  * decompressed kernel, so in total the sum of the compressed and and
 140  * decompressed kernel needs to be reserved.
 141  *
 142  *   For Aarch64, the kernel image is uncompressed and must be loaded at
 143  *   text_offset bytes (specified in the header of the Image) into a 2MB
 144  *   boundary. The 'booti' command relocates the image if necessary. Linux uses
 145  *   a default text_offset of 0x80000.  In summary, loading at 0x80000
 146  *   satisfies all these constraints and reserving memory up to 0x02400000
 147  *   permits fairly large (roughly 36M) kernels.
 148  *
 149  * scriptaddr and pxefile_addr_r can be pretty much anywhere that doesn't
 150  * conflict with something else. Reserving 1M for each of them at
 151  * 0x02400000-0x02500000 and 0x02500000-0x02600000 should be plenty.
 152  *
 153  * On ARM, both the DTB and any possible initrd must be loaded such that they
 154  * fit inside the lowmem mapping in Linux. In practice, this usually means not
 155  * more than ~700M away from the start of the kernel image but this number can
 156  * be larger OR smaller depending on e.g. the 'vmalloc=xxxM' command line
 157  * parameter given to the kernel. So reserving memory from low to high
 158  * satisfies this constraint again. Reserving 1M at 0x02600000-0x02700000 for
 159  * the DTB leaves rest of the free RAM to the initrd starting at 0x02700000.
 160  * Even with the smallest possible CPU-GPU memory split of the CPU getting
 161  * only 64M, the remaining 25M starting at 0x02700000 should allow quite
 162  * large initrds before they start colliding with U-Boot.
 163  */
 164 #define ENV_MEM_LAYOUT_SETTINGS \
 165         "fdt_high=" FDT_HIGH "\0" \
 166         "initrd_high=" INITRD_HIGH "\0" \
 167         "kernel_addr_r=0x00080000\0" \
 168         "scriptaddr=0x02400000\0" \
 169         "pxefile_addr_r=0x02500000\0" \
 170         "fdt_addr_r=0x02600000\0" \
 171         "ramdisk_addr_r=0x02700000\0"
 172
 173 #if CONFIG_IS_ENABLED(CMD_MMC)
 174         #define BOOT_TARGET_MMC(func) \
 175                 func(MMC, mmc, 0) \
 176                 func(MMC, mmc, 1)
 177 #else
 178         #define BOOT_TARGET_MMC(func)
 179 #endif
 180
 181 #if CONFIG_IS_ENABLED(CMD_USB)
 182         #define BOOT_TARGET_USB(func) func(USB, usb, 0)
 183 #else
 184         #define BOOT_TARGET_USB(func)
 185 #endif
 186
 187 #if CONFIG_IS_ENABLED(CMD_PXE)
 188         #define BOOT_TARGET_PXE(func) func(PXE, pxe, na)
 189 #else
 190         #define BOOT_TARGET_PXE(func)
 191 #endif
 192
 193 #if CONFIG_IS_ENABLED(CMD_DHCP)
 194         #define BOOT_TARGET_DHCP(func) func(DHCP, dhcp, na)
 195 #else
 196         #define BOOT_TARGET_DHCP(func)
 197 #endif
 198
 199 #define BOOT_TARGET_DEVICES(func) \
 200         BOOT_TARGET_MMC(func) \
 201         BOOT_TARGET_USB(func) \
 202         BOOT_TARGET_PXE(func) \
 203         BOOT_TARGET_DHCP(func)
 204
 205 #include <config_distro_bootcmd.h>
 206
 207 #define CONFIG_EXTRA_ENV_SETTINGS \
 208         "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
 209         ENV_DEVICE_SETTINGS \
 210         ENV_DFU_SETTINGS \
 211         ENV_MEM_LAYOUT_SETTINGS \
 212         BOOTENV
 213
 214
 215 #endif