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 LCD_BPP LCD_COLOR32 72 /* 73 * Prevent allocation of RAM for FB; the real FB address is queried 74 * dynamically from the VideoCore co-processor, and comes from RAM 75 * not owned by the ARM CPU. 76 */ 77 #define CONFIG_FB_ADDR 0 78 #define CONFIG_VIDEO_BCM2835 79 #define CONFIG_SYS_WHITE_ON_BLACK 80 81 #ifdef CONFIG_CMD_USB 82 #define CONFIG_USB_DWC2 83 #ifndef CONFIG_BCM2835 84 #define CONFIG_USB_DWC2_REG_ADDR 0x3f980000 85 #else 86 #define CONFIG_USB_DWC2_REG_ADDR 0x20980000 87 #endif 88 #define CONFIG_USB_HOST_ETHER 89 #define CONFIG_USB_ETHER_SMSC95XX 90 #define CONFIG_TFTP_TSIZE 91 #define CONFIG_MISC_INIT_R 92 #define CONFIG_SYS_USB_EVENT_POLL 93 #endif 94 95 /* Console UART */ 96 #ifdef CONFIG_BCM2837 97 #define CONFIG_BCM283X_MU_SERIAL 98 #else 99 #define CONFIG_PL01X_SERIAL 100 #endif 101 #define CONFIG_CONS_INDEX 0 102 103 /* Console configuration */ 104 #define CONFIG_SYS_CBSIZE 1024 105 #define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \ 106 sizeof(CONFIG_SYS_PROMPT) + 16) 107 108 /* Environment */ 109 #define CONFIG_ENV_SIZE SZ_16K 110 #define CONFIG_ENV_IS_IN_FAT 111 #define FAT_ENV_INTERFACE "mmc" 112 #define FAT_ENV_DEVICE_AND_PART "0:1" 113 #define FAT_ENV_FILE "uboot.env" 114 #define CONFIG_FAT_WRITE 115 #define CONFIG_ENV_VARS_UBOOT_CONFIG 116 #define CONFIG_SYS_LOAD_ADDR 0x1000000 117 #define CONFIG_PREBOOT "usb start" 118 119 /* Shell */ 120 #define CONFIG_SYS_MAXARGS 16 121 #define CONFIG_CMDLINE_EDITING 122 123 /* ATAGs support for bootm/bootz */ 124 #define CONFIG_SETUP_MEMORY_TAGS 125 #define CONFIG_CMDLINE_TAG 126 #define CONFIG_INITRD_TAG 127 128 #include <config_distro_defaults.h> 129 130 /* Environment */ 131 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 132 #define ENV_DEVICE_SETTINGS \ 133 "stdin=serial,usbkbd\0" \ 134 "stdout=serial,lcd\0" \ 135 "stderr=serial,lcd\0" 136 137 /* 138 * Memory layout for where various images get loaded by boot scripts: 139 * 140 * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this. 141 * 142 * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's 143 * binary firmware loads a DT to address 0x100, so we choose this address to 144 * match it. This allows custom boot scripts to pass this DT on to Linux 145 * simply by not over-writing the data at this address. When using U-Boot, 146 * U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW 147 * and loads its own DT from disk (triggered by boot.scr or extlinux.conf). 148 * 149 * pxefile_addr_r can be pretty much anywhere that doesn't conflict with 150 * something else. Put it low in memory to avoid conflicts. 151 * 152 * kernel_addr_r must be within the first 128M of RAM in order for the 153 * kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will 154 * decompress itself to 0x8000 after the start of RAM, kernel_addr_r 155 * should not overlap that area, or the kernel will have to copy itself 156 * somewhere else before decompression. Similarly, the address of any other 157 * data passed to the kernel shouldn't overlap the start of RAM. Pushing 158 * this up to 16M allows for a sizable kernel to be decompressed below the 159 * compressed load address. 160 * 161 * scriptaddr can be pretty much anywhere that doesn't conflict with something 162 * else. Choosing 32M allows for the compressed kernel to be up to 16M. 163 * 164 * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows 165 * for any boot script to be up to 1M, which is hopefully plenty. 166 */ 167 #define ENV_MEM_LAYOUT_SETTINGS \ 168 "fdt_high=ffffffff\0" \ 169 "initrd_high=ffffffff\0" \ 170 "fdt_addr_r=0x00000100\0" \ 171 "pxefile_addr_r=0x00100000\0" \ 172 "kernel_addr_r=0x01000000\0" \ 173 "scriptaddr=0x02000000\0" \ 174 "ramdisk_addr_r=0x02100000\0" \ 175 176 #define BOOT_TARGET_DEVICES(func) \ 177 func(MMC, mmc, 0) \ 178 func(USB, usb, 0) \ 179 func(PXE, pxe, na) \ 180 func(DHCP, dhcp, na) 181 #include <config_distro_bootcmd.h> 182 183 #define CONFIG_EXTRA_ENV_SETTINGS \ 184 "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \ 185 ENV_DEVICE_SETTINGS \ 186 ENV_MEM_LAYOUT_SETTINGS \ 187 BOOTENV 188 189 190 #endif 191