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_LOADADDR 0x00200000 59 60 #ifdef CONFIG_ARM64 61 #define CONFIG_SYS_BOOTM_LEN SZ_64M 62 #endif 63 64 /* Devices */ 65 /* GPIO */ 66 #define CONFIG_BCM2835_GPIO 67 /* LCD */ 68 #define CONFIG_LCD_DT_SIMPLEFB 69 #define CONFIG_VIDEO_BCM2835 70 71 #ifdef CONFIG_CMD_USB 72 #define CONFIG_TFTP_TSIZE 73 #endif 74 75 /* DFU over USB/UDC */ 76 #ifdef CONFIG_CMD_DFU 77 #define CONFIG_SYS_DFU_DATA_BUF_SIZE SZ_1M 78 #define CONFIG_SYS_DFU_MAX_FILE_SIZE SZ_2M 79 80 #ifdef CONFIG_ARM64 81 #define KERNEL_FILENAME "Image" 82 #else 83 #define KERNEL_FILENAME "zImage" 84 #endif 85 86 #define ENV_DFU_SETTINGS \ 87 "dfu_alt_info=u-boot.bin fat 0 1;uboot.env fat 0 1;" \ 88 "config.txt fat 0 1;" \ 89 KERNEL_FILENAME " fat 0 1\0" 90 #else 91 #define ENV_DFU_SETTINGS "" 92 #endif 93 94 /* Console configuration */ 95 #define CONFIG_SYS_CBSIZE 1024 96 97 /* Environment */ 98 #define CONFIG_SYS_LOAD_ADDR 0x1000000 99 100 /* Shell */ 101 102 /* ATAGs support for bootm/bootz */ 103 #define CONFIG_SETUP_MEMORY_TAGS 104 #define CONFIG_CMDLINE_TAG 105 #define CONFIG_INITRD_TAG 106 107 /* Environment */ 108 #define ENV_DEVICE_SETTINGS \ 109 "stdin=serial,usbkbd\0" \ 110 "stdout=serial,vidconsole\0" \ 111 "stderr=serial,vidconsole\0" 112 113 #ifdef CONFIG_ARM64 114 #define FDT_HIGH "ffffffffffffffff" 115 #define INITRD_HIGH "ffffffffffffffff" 116 #else 117 #define FDT_HIGH "ffffffff" 118 #define INITRD_HIGH "ffffffff" 119 #endif 120 121 /* 122 * Memory layout for where various images get loaded by boot scripts: 123 * 124 * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this. 125 * 126 * Older versions of the boot firmware place the firmware-loaded DTB at 0x100, 127 * newer versions place it in high memory. So prevent U-Boot from doing its own 128 * DTB + initrd relocation so that we won't accidentally relocate the initrd 129 * over the firmware-loaded DTB and generally try to lay out things starting 130 * from the bottom of RAM. 131 * 132 * kernel_addr_r has different constraints on ARM and Aarch64. For 32-bit ARM, 133 * it must be within the first 128M of RAM in order for the kernel's 134 * CONFIG_AUTO_ZRELADDR option to work. The kernel itself will be decompressed 135 * to 0x8000 but the decompressor clobbers 0x4000-0x8000 as well. The 136 * decompressor also likes to relocate itself to right past the end of the 137 * decompressed kernel, so in total the sum of the compressed and and 138 * decompressed kernel needs to be reserved. 139 * 140 * For Aarch64, the kernel image is uncompressed and must be loaded at 141 * text_offset bytes (specified in the header of the Image) into a 2MB 142 * boundary. The 'booti' command relocates the image if necessary. Linux uses 143 * a default text_offset of 0x80000. In summary, loading at 0x80000 144 * satisfies all these constraints and reserving memory up to 0x02400000 145 * permits fairly large (roughly 36M) kernels. 146 * 147 * scriptaddr and pxefile_addr_r can be pretty much anywhere that doesn't 148 * conflict with something else. Reserving 1M for each of them at 149 * 0x02400000-0x02500000 and 0x02500000-0x02600000 should be plenty. 150 * 151 * On ARM, both the DTB and any possible initrd must be loaded such that they 152 * fit inside the lowmem mapping in Linux. In practice, this usually means not 153 * more than ~700M away from the start of the kernel image but this number can 154 * be larger OR smaller depending on e.g. the 'vmalloc=xxxM' command line 155 * parameter given to the kernel. So reserving memory from low to high 156 * satisfies this constraint again. Reserving 1M at 0x02600000-0x02700000 for 157 * the DTB leaves rest of the free RAM to the initrd starting at 0x02700000. 158 * Even with the smallest possible CPU-GPU memory split of the CPU getting 159 * only 64M, the remaining 25M starting at 0x02700000 should allow quite 160 * large initrds before they start colliding with U-Boot. 161 */ 162 #define ENV_MEM_LAYOUT_SETTINGS \ 163 "fdt_high=" FDT_HIGH "\0" \ 164 "initrd_high=" INITRD_HIGH "\0" \ 165 "kernel_addr_r=0x00080000\0" \ 166 "scriptaddr=0x02400000\0" \ 167 "pxefile_addr_r=0x02500000\0" \ 168 "fdt_addr_r=0x02600000\0" \ 169 "ramdisk_addr_r=0x02700000\0" 170 171 #if CONFIG_IS_ENABLED(CMD_MMC) 172 #define BOOT_TARGET_MMC(func) \ 173 func(MMC, mmc, 0) \ 174 func(MMC, mmc, 1) 175 #else 176 #define BOOT_TARGET_MMC(func) 177 #endif 178 179 #if CONFIG_IS_ENABLED(CMD_USB) 180 #define BOOT_TARGET_USB(func) func(USB, usb, 0) 181 #else 182 #define BOOT_TARGET_USB(func) 183 #endif 184 185 #if CONFIG_IS_ENABLED(CMD_PXE) 186 #define BOOT_TARGET_PXE(func) func(PXE, pxe, na) 187 #else 188 #define BOOT_TARGET_PXE(func) 189 #endif 190 191 #if CONFIG_IS_ENABLED(CMD_DHCP) 192 #define BOOT_TARGET_DHCP(func) func(DHCP, dhcp, na) 193 #else 194 #define BOOT_TARGET_DHCP(func) 195 #endif 196 197 #define BOOT_TARGET_DEVICES(func) \ 198 BOOT_TARGET_MMC(func) \ 199 BOOT_TARGET_USB(func) \ 200 BOOT_TARGET_PXE(func) \ 201 BOOT_TARGET_DHCP(func) 202 203 #include <config_distro_bootcmd.h> 204 205 #define CONFIG_EXTRA_ENV_SETTINGS \ 206 "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \ 207 ENV_DEVICE_SETTINGS \ 208 ENV_DFU_SETTINGS \ 209 ENV_MEM_LAYOUT_SETTINGS \ 210 BOOTENV 211 212 213 #endif 214