1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * ti_armv7_common.h 4 * 5 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/ 6 * 7 * The various ARMv7 SoCs from TI all share a number of IP blocks when 8 * implementing a given feature. Rather than define these in every 9 * board or even SoC common file, we define a common file to be re-used 10 * in all cases. While technically true that some of these details are 11 * configurable at the board design, they are common throughout SoC 12 * reference platforms as well as custom designs and become de facto 13 * standards. 14 */ 15 16 #ifndef __CONFIG_TI_ARMV7_COMMON_H__ 17 #define __CONFIG_TI_ARMV7_COMMON_H__ 18 19 /* 20 * We setup defaults based on constraints from the Linux kernel, which should 21 * also be safe elsewhere. We have the default load at 32MB into DDR (for 22 * the kernel), FDT above 128MB (the maximum location for the end of the 23 * kernel), and the ramdisk 512KB above that (allowing for hopefully never 24 * seen large trees). We say all of this must be within the first 256MB 25 * as that will normally be within the kernel lowmem and thus visible via 26 * bootm_size and we only run on platforms with 256MB or more of memory. 27 * 28 * As a temporary storage for DTBO blobs (which should be applied into DTB 29 * blob), we use the location 15.5 MB above the ramdisk. If someone wants to 30 * use ramdisk bigger than 15.5 MB, then DTBO can be loaded and applied to DTB 31 * blob before loading the ramdisk, as DTBO location is only used as a temporary 32 * storage, and can be re-used after 'fdt apply' command is done. 33 */ 34 #define DEFAULT_LINUX_BOOT_ENV \ 35 "loadaddr=0x82000000\0" \ 36 "kernel_addr_r=0x82000000\0" \ 37 "fdtaddr=0x88000000\0" \ 38 "dtboaddr=0x89000000\0" \ 39 "fdt_addr_r=0x88000000\0" \ 40 "fdtoverlay_addr_r=0x89000000\0" \ 41 "rdaddr=0x88080000\0" \ 42 "ramdisk_addr_r=0x88080000\0" \ 43 "scriptaddr=0x80000000\0" \ 44 "pxefile_addr_r=0x80100000\0" \ 45 "bootm_size=0x10000000\0" \ 46 "boot_fdt=try\0" 47 48 #define DEFAULT_FIT_TI_ARGS \ 49 "boot_fit=0\0" \ 50 "addr_fit=0x90000000\0" \ 51 "name_fit=fitImage\0" \ 52 "update_to_fit=setenv loadaddr ${addr_fit}; setenv bootfile ${name_fit}\0" \ 53 "get_overlaystring=" \ 54 "for overlay in $name_overlays;" \ 55 "do;" \ 56 "setenv overlaystring ${overlaystring}'#'${overlay};" \ 57 "done;\0" \ 58 "get_fit_config=setexpr name_fit_config gsub / _ conf-${fdtfile}\0" \ 59 "run_fit=run get_fit_config; bootm ${addr_fit}#${name_fit_config}${overlaystring}\0" \ 60 61 /* 62 * DDR information. If the CONFIG_NR_DRAM_BANKS is not defined, 63 * we say (for simplicity) that we have 1 bank, always, even when 64 * we have more. We always start at 0x80000000, and we place the 65 * initial stack pointer in our SRAM. Otherwise, we can define 66 * CONFIG_NR_DRAM_BANKS before including this file. 67 */ 68 #define CFG_SYS_SDRAM_BASE 0x80000000 69 70 /* If DM_I2C, enable non-DM I2C support */ 71 72 /* 73 * The following are general good-enough settings for U-Boot. We set a 74 * large malloc pool as we generally have a lot of DDR, and we opt for 75 * function over binary size in the main portion of U-Boot as this is 76 * generally easily constrained later if needed. We enable the config 77 * options that give us information in the environment about what board 78 * we are on so we do not need to rely on the command prompt. We set a 79 * console baudrate of 115200 and use the default baud rate table. 80 */ 81 82 /* As stated above, the following choices are optional. */ 83 84 /* Console I/O Buffer Size */ 85 /* 86 * When we have SPI, NOR or NAND flash we expect to be making use of 87 * mtdparts, both for ease of use in U-Boot and for passing information 88 * on to the Linux kernel. 89 */ 90 91 /* 92 * Our platforms make use of SPL to initalize the hardware (primarily 93 * memory) enough for full U-Boot to be loaded. We make use of the general 94 * SPL framework found under common/spl/. Given our generally common memory 95 * map, we set a number of related defaults and sizes here. 96 */ 97 #if !defined(CONFIG_NOR_BOOT) && \ 98 !(defined(CONFIG_QSPI_BOOT) && defined(CONFIG_AM43XX)) 99 100 /* 101 * We also support Falcon Mode so that the Linux kernel can be booted 102 * directly from SPL. This is not currently available on HS devices. 103 */ 104 105 /* 106 * Place the image at the start of the ROM defined image space (per 107 * CONFIG_SPL_TEXT_BASE and we limit our size to the ROM-defined 108 * downloaded image area minus 1KiB for scratch space. We initalize DRAM as 109 * soon as we can so that we can place stack, malloc and BSS there. We load 110 * U-Boot itself into memory at 0x80800000 for legacy reasons (to not conflict 111 * with older SPLs). We have our BSS be placed 2MiB after this, to allow for 112 * the default Linux kernel address of 0x80008000 to work with most sized 113 * kernels, in the Falcon Mode case. We have the SPL malloc pool at the end 114 * of the BSS area. We suggest that the stack be placed at 32MiB after the 115 * start of DRAM to allow room for all of the above (handled in Kconfig). 116 */ 117 118 #ifdef CONFIG_SPL_OS_BOOT 119 /* FAT */ 120 121 /* RAW SD card / eMMC */ 122 #endif 123 124 /* General parts of the framework, required. */ 125 126 #ifdef CONFIG_MTD_RAW_NAND 127 #define CFG_SYS_NAND_U_BOOT_START CONFIG_TEXT_BASE 128 #endif 129 #endif /* !CONFIG_NOR_BOOT */ 130 131 /* Generic Environment Variables */ 132 133 #ifdef CONFIG_CMD_NET 134 #define NETARGS \ 135 "static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}" \ 136 "::off\0" \ 137 "nfsopts=nolock\0" \ 138 "rootpath=/export/rootfs\0" \ 139 "netloadimage=tftp ${loadaddr} ${bootfile}\0" \ 140 "netloadfdt=tftp ${fdtaddr} ${fdtfile}\0" \ 141 "netargs=setenv bootargs console=${console} " \ 142 "${optargs} " \ 143 "root=/dev/nfs " \ 144 "nfsroot=${serverip}:${rootpath},${nfsopts} rw " \ 145 "ip=dhcp\0" \ 146 "netboot=echo Booting from network ...; " \ 147 "setenv autoload no; " \ 148 "dhcp; " \ 149 "run netloadimage; " \ 150 "run netloadfdt; " \ 151 "run netargs; " \ 152 "bootz ${loadaddr} - ${fdtaddr}\0" 153 #else 154 #define NETARGS "" 155 #endif 156 157 #endif /* __CONFIG_TI_ARMV7_COMMON_H__ */ 158