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
  21 struct bcmstb_boot_parameters {
  22         u32 r0;
  23         u32 r1;
  24         u32 r2;
  25         u32 r3;
  26         u32 sp;
  27         u32 lr;
  28 };
  29
  30 extern struct bcmstb_boot_parameters bcmstb_boot_parameters;
  31
  32 extern 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_BAUDRATE                 115200
 119 #define CONFIG_SYS_BAUDRATE_TABLE       {4800, 9600, 19200, 38400, 57600, \
 120                                          115200}
 121
 122 /*
 123  * Informational display configuration.
 124  */
 125 #define CONFIG_REVISION_TAG
 126
 127 /*
 128  * Command configuration.
 129  */
 130 #define CONFIG_CMD_ASKENV
 131 #define CONFIG_CMD_CACHE
 132 #define CONFIG_CMD_EXT2
 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 */