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