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