1 /* 2 * (C) Copyright 2012-2016 Stephen Warren 3 * 4 * SPDX-License-Identifier: GPL-2.0 5 */ 6 7 #ifndef __CONFIG_H 8 #define __CONFIG_H 9 10 #include <linux/sizes.h> 11 #include <asm/arch/timer.h> 12 13 #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B) 14 #define CONFIG_SKIP_LOWLEVEL_INIT 15 #endif 16 17 /* Architecture, CPU, etc.*/ 18 #define CONFIG_ARCH_CPU_INIT 19 20 /* Use SoC timer for AArch32, but architected timer for AArch64 */ 21 #ifndef CONFIG_ARM64 22 #define CONFIG_SYS_TIMER_RATE 1000000 23 #define CONFIG_SYS_TIMER_COUNTER \ 24 (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo) 25 #endif 26 27 /* 28 * 2835 is a SKU in a series for which the 2708 is the first or primary SoC, 29 * so 2708 has historically been used rather than a dedicated 2835 ID. 30 * 31 * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation 32 * chose to use someone else's previously registered machine ID (3139, MX51_GGC) 33 * rather than obtaining a valid ID:-/ 34 * 35 * For the bcm2837, hopefully a machine type is not needed, since everything 36 * is DT. 37 */ 38 #ifdef CONFIG_BCM2835 39 #define CONFIG_MACH_TYPE MACH_TYPE_BCM2708 40 #endif 41 42 /* Memory layout */ 43 #define CONFIG_NR_DRAM_BANKS 1 44 #define CONFIG_SYS_SDRAM_BASE 0x00000000 45 #ifdef CONFIG_ARM64 46 #define CONFIG_SYS_TEXT_BASE 0x00080000 47 #else 48 #define CONFIG_SYS_TEXT_BASE 0x00008000 49 #endif 50 #define CONFIG_SYS_UBOOT_BASE CONFIG_SYS_TEXT_BASE 51 /* 52 * The board really has 256M. However, the VC (VideoCore co-processor) shares 53 * the RAM, and uses a configurable portion at the top. We tell U-Boot that a 54 * smaller amount of RAM is present in order to avoid stomping on the area 55 * the VC uses. 56 */ 57 #define CONFIG_SYS_SDRAM_SIZE SZ_128M 58 #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \ 59 CONFIG_SYS_SDRAM_SIZE - \ 60 GENERATED_GBL_DATA_SIZE) 61 #define CONFIG_SYS_MALLOC_LEN SZ_4M 62 #define CONFIG_SYS_MEMTEST_START 0x00100000 63 #define CONFIG_SYS_MEMTEST_END 0x00200000 64 #define CONFIG_LOADADDR 0x00200000 65 66 /* Devices */ 67 /* GPIO */ 68 #define CONFIG_BCM2835_GPIO 69 /* LCD */ 70 #define CONFIG_LCD_DT_SIMPLEFB 71 #define CONFIG_VIDEO_BCM2835 72 73 #ifdef CONFIG_CMD_USB 74 #define CONFIG_USB_HOST_ETHER 75 #define CONFIG_USB_ETHER_SMSC95XX 76 #define CONFIG_TFTP_TSIZE 77 #define CONFIG_MISC_INIT_R 78 #define CONFIG_SYS_USB_EVENT_POLL 79 #endif 80 81 /* Console UART */ 82 #ifdef CONFIG_BCM2837 83 #define CONFIG_BCM283X_MU_SERIAL 84 #else 85 #define CONFIG_PL01X_SERIAL 86 #endif 87 88 /* Console configuration */ 89 #define CONFIG_SYS_CBSIZE 1024 90 #define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \ 91 sizeof(CONFIG_SYS_PROMPT) + 16) 92 93 /* Environment */ 94 #define CONFIG_ENV_SIZE SZ_16K 95 #define CONFIG_ENV_IS_IN_FAT 96 #define FAT_ENV_INTERFACE "mmc" 97 #define FAT_ENV_DEVICE_AND_PART "0:1" 98 #define FAT_ENV_FILE "uboot.env" 99 #define CONFIG_ENV_VARS_UBOOT_CONFIG 100 #define CONFIG_SYS_LOAD_ADDR 0x1000000 101 #define CONFIG_PREBOOT "usb start" 102 103 /* Shell */ 104 #define CONFIG_SYS_MAXARGS 16 105 #define CONFIG_CMDLINE_EDITING 106 107 /* ATAGs support for bootm/bootz */ 108 #define CONFIG_SETUP_MEMORY_TAGS 109 #define CONFIG_CMDLINE_TAG 110 #define CONFIG_INITRD_TAG 111 112 #include <config_distro_defaults.h> 113 114 /* Environment */ 115 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 116 #define ENV_DEVICE_SETTINGS \ 117 "stdin=serial,usbkbd\0" \ 118 "stdout=serial,vidconsole\0" \ 119 "stderr=serial,vidconsole\0" 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 * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's 127 * binary firmware loads a DT to address 0x100, so we choose this address to 128 * match it. This allows custom boot scripts to pass this DT on to Linux 129 * simply by not over-writing the data at this address. When using U-Boot, 130 * U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW 131 * and loads its own DT from disk (triggered by boot.scr or extlinux.conf). 132 * 133 * pxefile_addr_r can be pretty much anywhere that doesn't conflict with 134 * something else. Put it low in memory to avoid conflicts. 135 * 136 * kernel_addr_r must be within the first 128M of RAM in order for the 137 * kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will 138 * decompress itself to 0x8000 after the start of RAM, kernel_addr_r 139 * should not overlap that area, or the kernel will have to copy itself 140 * somewhere else before decompression. Similarly, the address of any other 141 * data passed to the kernel shouldn't overlap the start of RAM. Pushing 142 * this up to 16M allows for a sizable kernel to be decompressed below the 143 * compressed load address. 144 * 145 * scriptaddr can be pretty much anywhere that doesn't conflict with something 146 * else. Choosing 32M allows for the compressed kernel to be up to 16M. 147 * 148 * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows 149 * for any boot script to be up to 1M, which is hopefully plenty. 150 */ 151 #define ENV_MEM_LAYOUT_SETTINGS \ 152 "fdt_high=ffffffff\0" \ 153 "initrd_high=ffffffff\0" \ 154 "fdt_addr_r=0x00000100\0" \ 155 "pxefile_addr_r=0x00100000\0" \ 156 "kernel_addr_r=0x01000000\0" \ 157 "scriptaddr=0x02000000\0" \ 158 "ramdisk_addr_r=0x02100000\0" \ 159 160 #define BOOT_TARGET_DEVICES(func) \ 161 func(MMC, mmc, 0) \ 162 func(USB, usb, 0) \ 163 func(PXE, pxe, na) \ 164 func(DHCP, dhcp, na) 165 #include <config_distro_bootcmd.h> 166 167 #define CONFIG_EXTRA_ENV_SETTINGS \ 168 "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \ 169 ENV_DEVICE_SETTINGS \ 170 ENV_MEM_LAYOUT_SETTINGS \ 171 BOOTENV 172 173 174 #endif 175