LXR uboot/include/configs/bcmstb.h

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * (C) Copyright 2018  Cisco Systems, Inc.
   4 *
   5 * Author: Thomas Fitzsimmons <fitzsim@fitzsim.org>
   6 *
   7 * Configuration settings for the Broadcom BCMSTB SoC family.
   8 */
   9
  10#ifndef __BCMSTB_H
  11#define __BCMSTB_H
  12
  13#include "version.h"
  14#include <linux/sizes.h>
  15
  16#ifndef __ASSEMBLY__
  17
  18#include <linux/types.h>
  19
  20struct bcmstb_boot_parameters {
  21        u32 r0;
  22        u32 r1;
  23        u32 r2;
  24        u32 r3;
  25        u32 sp;
  26        u32 lr;
  27};
  28
  29extern struct bcmstb_boot_parameters bcmstb_boot_parameters;
  30
  31extern phys_addr_t prior_stage_fdt_address;
  32
  33#endif /* __ASSEMBLY__ */
  34
  35/*
  36 * CPU configuration.
  37 */
  38#define CONFIG_SKIP_LOWLEVEL_INIT
  39
  40/*
  41 * Memory configuration.
  42 *
  43 * The prior stage BOLT bootloader sets up memory for us.
  44 *
  45 * An example boot memory layout after loading everything is:
  46 *
  47 *       0x0000 8000    vmlinux.bin.gz
  48 *             :        [~31 MiB uncompressed max]
  49 *       0x01ef f000    FIT containing signed public key
  50 *             :        [~2 KiB in size]
  51 *       0x01f0 0000    DTB copied from prior-stage-provided region
  52 *             :        [~1 MiB max]
  53 *       0x0200 0000    FIT containing ramdisk and device tree
  54 *             :          initramfs.cpio.gz
  55 *             :          [~208 MiB uncompressed max, to CMA/bmem low address]
  56 *             :          [~80 MiB compressed max, to PSB low address]
  57 *             :          device tree binary
  58 *             :          [~60 KiB]
  59 *       0x0700 0000    Prior stage bootloader (PSB)
  60 *             :
  61 *       0x0761 7000    Prior-stage-provided device tree binary (DTB)
  62 *             :        [~40 KiB in size]
  63 *       0x0f00 0000    Contiguous memory allocator (CMA/bmem) low address
  64 *             :
  65 *       0x8010 0000    U-Boot code at ELF load address
  66 *             :        [~500 KiB in size, stripped]
  67 *       0xc000 0000    Top of RAM
  68 *
  69 * Setting gd->relocaddr to CONFIG_SYS_TEXT_BASE in dram_init_banksize
  70 * prevents U-Boot from relocating itself when it is run as an ELF
  71 * program by the prior stage bootloader.
  72 *
  73 * We want to keep the ramdisk and FDT in the FIT image in-place, to
  74 * accommodate stblinux's bmem and CMA regions.  To accomplish this,
  75 * we set initrd_high and fdt_high to 0xffffffff, and the load and
  76 * entry addresses of the FIT ramdisk entry to 0x0.
  77 *
  78 * Overwriting the prior stage bootloader causes memory instability,
  79 * so the compressed initramfs needs to fit between the load address
  80 * and the PSB low address.  In BOLT's default configuration this
  81 * limits the compressed size of the initramfs to approximately 80
  82 * MiB.  However, BOLT can be configured to allow loading larger
  83 * initramfs images, in which case this limitation is eliminated.
  84 */
  85#define CONFIG_SYS_SDRAM_BASE           0x00000000
  86#define CONFIG_SYS_INIT_RAM_SIZE        0x100000
  87#define CONFIG_SYS_INIT_SP_ADDR         (CONFIG_SYS_INIT_RAM_ADDR +     \
  88                                         CONFIG_SYS_INIT_RAM_SIZE -     \
  89                                         GENERATED_GBL_DATA_SIZE)
  90#define CONFIG_SYS_LOAD_ADDR            0x2000000
  91
  92/*
  93 * CONFIG_SYS_LOAD_ADDR - 1 MiB.
  94 */
  95#define CONFIG_SYS_FDT_SAVE_ADDRESS     0x1f00000
  96#define CONFIG_SYS_CBSIZE               512
  97#define CONFIG_SYS_MAXARGS              32
  98
  99/*
 100 * Large kernel image bootm configuration.
 101 */
 102#define CONFIG_SYS_BOOTM_LEN            SZ_64M
 103
 104/*
 105 * NS16550 configuration.
 106 */
 107#define V_NS16550_CLK                   81000000
 108
 109#define CONFIG_SYS_NS16550
 110#define CONFIG_SYS_NS16550_SERIAL
 111#define CONFIG_SYS_NS16550_REG_SIZE     (-4)
 112#define CONFIG_SYS_NS16550_CLK          V_NS16550_CLK
 113
 114/*
 115 * Serial console configuration.
 116 */
 117#define CONFIG_BAUDRATE                 115200
 118#define CONFIG_SYS_BAUDRATE_TABLE       {4800, 9600, 19200, 38400, 57600, \
 119                                         115200}
 120
 121/*
 122 * Informational display configuration.
 123 */
 124#define CONFIG_REVISION_TAG
 125
 126/*
 127 * Command configuration.
 128 */
 129#define CONFIG_CMD_ASKENV
 130#define CONFIG_CMD_CACHE
 131#define CONFIG_CMD_EXT2
 132#define CONFIG_CMD_MMC
 133
 134/*
 135 * Flash configuration.
 136 */
 137#define CONFIG_ST_SMI
 138#define CONFIG_SPI_FLASH_STMICRO
 139#define CONFIG_SPI_FLASH_MACRONIX
 140
 141/*
 142 * Filesystem configuration.
 143 */
 144#define CONFIG_DOS_PARTITION
 145#define CONFIG_CMD_EXT4
 146#define CONFIG_FS_EXT4
 147#define CONFIG_CMD_FS_GENERIC
 148
 149/*
 150 * Environment configuration.
 151 */
 152#define CONFIG_ENV_OVERWRITE
 153
 154/*
 155 * Save the prior stage provided DTB.
 156 */
 157/*
 158 * Enable in-place RFS with this initrd_high setting.
 159 */
 160#define CONFIG_EXTRA_ENV_SETTINGS                                       \
 161        "fdtsaveaddr=" __stringify(CONFIG_SYS_FDT_SAVE_ADDRESS) "\0"    \
 162        "initrd_high=0xffffffff\0"                                      \
 163        "fdt_high=0xffffffff\0"
 164
 165/*
 166 * Set fdtaddr to prior stage-provided DTB in board_late_init, when
 167 * writeable environment is available.
 168 */
 169#define CONFIG_BOARD_LATE_INIT
 170
 171#endif /* __BCMSTB_H */
 172