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 #define CONFIG_SYS_UBOOT_BASE CONFIG_SYS_TEXT_BASE 46 /* 47 * The board really has 256M. However, the VC (VideoCore co-processor) shares 48 * the RAM, and uses a configurable portion at the top. We tell U-Boot that a 49 * smaller amount of RAM is present in order to avoid stomping on the area 50 * the VC uses. 51 */ 52 #define CONFIG_SYS_SDRAM_SIZE SZ_128M 53 #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \ 54 CONFIG_SYS_SDRAM_SIZE - \ 55 GENERATED_GBL_DATA_SIZE) 56 #define CONFIG_SYS_MALLOC_LEN SZ_4M 57 #define CONFIG_SYS_MEMTEST_START 0x00100000 58 #define CONFIG_SYS_MEMTEST_END 0x00200000 59 #define CONFIG_LOADADDR 0x00200000 60 61 /* Devices */ 62 /* GPIO */ 63 #define CONFIG_BCM2835_GPIO 64 /* LCD */ 65 #define CONFIG_LCD_DT_SIMPLEFB 66 #define CONFIG_VIDEO_BCM2835 67 68 #ifdef CONFIG_CMD_USB 69 #define CONFIG_TFTP_TSIZE 70 #define CONFIG_MISC_INIT_R 71 #endif 72 73 /* Console configuration */ 74 #define CONFIG_SYS_CBSIZE 1024 75 76 /* Environment */ 77 #define CONFIG_ENV_SIZE SZ_16K 78 #define CONFIG_ENV_VARS_UBOOT_CONFIG 79 #define CONFIG_SYS_LOAD_ADDR 0x1000000 80 #define CONFIG_PREBOOT "usb start" 81 82 /* Shell */ 83 #define CONFIG_CMDLINE_EDITING 84 85 /* ATAGs support for bootm/bootz */ 86 #define CONFIG_SETUP_MEMORY_TAGS 87 #define CONFIG_CMDLINE_TAG 88 #define CONFIG_INITRD_TAG 89 90 #include <config_distro_defaults.h> 91 92 /* Environment */ 93 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG 94 #define ENV_DEVICE_SETTINGS \ 95 "stdin=serial,usbkbd\0" \ 96 "stdout=serial,vidconsole\0" \ 97 "stderr=serial,vidconsole\0" 98 99 /* 100 * Memory layout for where various images get loaded by boot scripts: 101 * 102 * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this. 103 * 104 * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's 105 * binary firmware loads a DT to address 0x100, so we choose this address to 106 * match it. This allows custom boot scripts to pass this DT on to Linux 107 * simply by not over-writing the data at this address. When using U-Boot, 108 * U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW 109 * and loads its own DT from disk (triggered by boot.scr or extlinux.conf). 110 * 111 * pxefile_addr_r can be pretty much anywhere that doesn't conflict with 112 * something else. Put it low in memory to avoid conflicts. 113 * 114 * kernel_addr_r must be within the first 128M of RAM in order for the 115 * kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will 116 * decompress itself to 0x8000 after the start of RAM, kernel_addr_r 117 * should not overlap that area, or the kernel will have to copy itself 118 * somewhere else before decompression. Similarly, the address of any other 119 * data passed to the kernel shouldn't overlap the start of RAM. Pushing 120 * this up to 16M allows for a sizable kernel to be decompressed below the 121 * compressed load address. 122 * 123 * scriptaddr can be pretty much anywhere that doesn't conflict with something 124 * else. Choosing 32M allows for the compressed kernel to be up to 16M. 125 * 126 * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows 127 * for any boot script to be up to 1M, which is hopefully plenty. 128 */ 129 #define ENV_MEM_LAYOUT_SETTINGS \ 130 "fdt_high=ffffffff\0" \ 131 "initrd_high=ffffffff\0" \ 132 "fdt_addr_r=0x00000100\0" \ 133 "pxefile_addr_r=0x00100000\0" \ 134 "kernel_addr_r=0x01000000\0" \ 135 "scriptaddr=0x02000000\0" \ 136 "ramdisk_addr_r=0x02100000\0" \ 137 138 #define BOOT_TARGET_DEVICES(func) \ 139 func(MMC, mmc, 0) \ 140 func(USB, usb, 0) \ 141 func(PXE, pxe, na) \ 142 func(DHCP, dhcp, na) 143 #include <config_distro_bootcmd.h> 144 145 #define CONFIG_EXTRA_ENV_SETTINGS \ 146 "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \ 147 ENV_DEVICE_SETTINGS \ 148 ENV_MEM_LAYOUT_SETTINGS \ 149 BOOTENV 150 151 152 #endif 153