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 #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B) 13 #define CONFIG_SKIP_LOWLEVEL_INIT 14 #endif 15 16 /* Architecture, CPU, etc.*/ 17 #define CONFIG_ARCH_CPU_INIT 18 19 /* Use SoC timer for AArch32, but architected timer for AArch64 */ 20 #ifndef CONFIG_ARM64 21 #define CONFIG_SYS_TIMER_RATE 1000000 22 #define CONFIG_SYS_TIMER_COUNTER \ 23 (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo) 24 #endif 25 26 /* 27 * 2835 is a SKU in a series for which the 2708 is the first or primary SoC, 28 * so 2708 has historically been used rather than a dedicated 2835 ID. 29 * 30 * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation 31 * chose to use someone else's previously registered machine ID (3139, MX51_GGC) 32 * rather than obtaining a valid ID:-/ 33 * 34 * For the bcm2837, hopefully a machine type is not needed, since everything 35 * is DT. 36 */ 37 #ifdef CONFIG_BCM2835 38 #define CONFIG_MACH_TYPE MACH_TYPE_BCM2708 39 #endif 40 41 /* Memory layout */ 42 #define CONFIG_NR_DRAM_BANKS 1 43 #define CONFIG_SYS_SDRAM_BASE 0x00000000 44 #define CONFIG_SYS_UBOOT_BASE CONFIG_SYS_TEXT_BASE 45 /* 46 * The board really has 256M. However, the VC (VideoCore co-processor) shares 47 * the RAM, and uses a configurable portion at the top. We tell U-Boot that a 48 * smaller amount of RAM is present in order to avoid stomping on the area 49 * the VC uses. 50 */ 51 #define CONFIG_SYS_SDRAM_SIZE SZ_128M 52 #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \ 53 CONFIG_SYS_SDRAM_SIZE - \ 54 GENERATED_GBL_DATA_SIZE) 55 #define CONFIG_SYS_MALLOC_LEN SZ_4M 56 #define CONFIG_SYS_MEMTEST_START 0x00100000 57 #define CONFIG_SYS_MEMTEST_END 0x00200000 58 #define CONFIG_LOADADDR 0x00200000 59 60 /* Devices */ 61 /* GPIO */ 62 #define CONFIG_BCM2835_GPIO 63 /* LCD */ 64 #define CONFIG_LCD_DT_SIMPLEFB 65 #define CONFIG_VIDEO_BCM2835 66 67 #ifdef CONFIG_CMD_USB 68 #define CONFIG_TFTP_TSIZE 69 #define CONFIG_MISC_INIT_R 70 #endif 71 72 /* Console configuration */ 73 #define CONFIG_SYS_CBSIZE 1024 74 75 /* Environment */ 76 #define CONFIG_ENV_SIZE SZ_16K 77 #define CONFIG_SYS_LOAD_ADDR 0x1000000 78 #define CONFIG_PREBOOT "usb start" 79 80 /* Shell */ 81 82 /* ATAGs support for bootm/bootz */ 83 #define CONFIG_SETUP_MEMORY_TAGS 84 #define CONFIG_CMDLINE_TAG 85 #define CONFIG_INITRD_TAG 86 87 /* Environment */ 88 #define ENV_DEVICE_SETTINGS \ 89 "stdin=serial,usbkbd\0" \ 90 "stdout=serial,vidconsole\0" \ 91 "stderr=serial,vidconsole\0" 92 93 /* 94 * Memory layout for where various images get loaded by boot scripts: 95 * 96 * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this. 97 * 98 * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's 99 * binary firmware loads a DT to address 0x100, so we choose this address to 100 * match it. This allows custom boot scripts to pass this DT on to Linux 101 * simply by not over-writing the data at this address. When using U-Boot, 102 * U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW 103 * and loads its own DT from disk (triggered by boot.scr or extlinux.conf). 104 * 105 * pxefile_addr_r can be pretty much anywhere that doesn't conflict with 106 * something else. Put it low in memory to avoid conflicts. 107 * 108 * kernel_addr_r must be within the first 128M of RAM in order for the 109 * kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will 110 * decompress itself to 0x8000 after the start of RAM, kernel_addr_r 111 * should not overlap that area, or the kernel will have to copy itself 112 * somewhere else before decompression. Similarly, the address of any other 113 * data passed to the kernel shouldn't overlap the start of RAM. Pushing 114 * this up to 16M allows for a sizable kernel to be decompressed below the 115 * compressed load address. 116 * 117 * scriptaddr can be pretty much anywhere that doesn't conflict with something 118 * else. Choosing 32M allows for the compressed kernel to be up to 16M. 119 * 120 * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows 121 * for any boot script to be up to 1M, which is hopefully plenty. 122 */ 123 #define ENV_MEM_LAYOUT_SETTINGS \ 124 "fdt_high=ffffffff\0" \ 125 "initrd_high=ffffffff\0" \ 126 "fdt_addr_r=0x00000100\0" \ 127 "pxefile_addr_r=0x00100000\0" \ 128 "kernel_addr_r=0x01000000\0" \ 129 "scriptaddr=0x02000000\0" \ 130 "ramdisk_addr_r=0x02100000\0" \ 131 132 #define BOOT_TARGET_DEVICES(func) \ 133 func(MMC, mmc, 0) \ 134 func(USB, usb, 0) \ 135 func(PXE, pxe, na) \ 136 func(DHCP, dhcp, na) 137 #include <config_distro_bootcmd.h> 138 139 #define CONFIG_EXTRA_ENV_SETTINGS \ 140 "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \ 141 ENV_DEVICE_SETTINGS \ 142 ENV_MEM_LAYOUT_SETTINGS \ 143 BOOTENV 144 145 146 #endif 147