/* SPDX-License-Identifier: GPL-2.0 */ /* * (C) Copyright 2012-2016 Stephen Warren */ #ifndef __CONFIG_H #define __CONFIG_H #include #include #ifndef __ASSEMBLY__ #include #endif #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B) #define CONFIG_SKIP_LOWLEVEL_INIT #endif /* Architecture, CPU, etc.*/ /* Use SoC timer for AArch32, but architected timer for AArch64 */ #ifndef CONFIG_ARM64 #define CONFIG_SYS_TIMER_RATE 1000000 #define CONFIG_SYS_TIMER_COUNTER \ (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo) #endif /* * 2835 is a SKU in a series for which the 2708 is the first or primary SoC, * so 2708 has historically been used rather than a dedicated 2835 ID. * * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation * chose to use someone else's previously registered machine ID (3139, MX51_GGC) * rather than obtaining a valid ID:-/ * * For the bcm2837, hopefully a machine type is not needed, since everything * is DT. */ #ifdef CONFIG_BCM2835 #define CONFIG_MACH_TYPE MACH_TYPE_BCM2708 #endif /* Memory layout */ #define CONFIG_SYS_SDRAM_BASE 0x00000000 #define CONFIG_SYS_UBOOT_BASE CONFIG_SYS_TEXT_BASE /* * The board really has 256M. However, the VC (VideoCore co-processor) shares * the RAM, and uses a configurable portion at the top. We tell U-Boot that a * smaller amount of RAM is present in order to avoid stomping on the area * the VC uses. */ #define CONFIG_SYS_SDRAM_SIZE SZ_128M #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \ CONFIG_SYS_SDRAM_SIZE - \ GENERATED_GBL_DATA_SIZE) #define CONFIG_SYS_MALLOC_LEN SZ_4M #define CONFIG_LOADADDR 0x00200000 #ifdef CONFIG_ARM64 #define CONFIG_SYS_BOOTM_LEN SZ_64M #endif /* Devices */ /* GPIO */ #define CONFIG_BCM2835_GPIO /* LCD */ #define CONFIG_LCD_DT_SIMPLEFB #define CONFIG_VIDEO_BCM2835 #ifdef CONFIG_CMD_USB #define CONFIG_TFTP_TSIZE #endif /* DFU over USB/UDC */ #ifdef CONFIG_CMD_DFU #define CONFIG_SYS_DFU_DATA_BUF_SIZE SZ_1M #define CONFIG_SYS_DFU_MAX_FILE_SIZE SZ_2M #ifdef CONFIG_ARM64 #define KERNEL_FILENAME "Image" #else #define KERNEL_FILENAME "zImage" #endif #define ENV_DFU_SETTINGS \ "dfu_alt_info=u-boot.bin fat 0 1;uboot.env fat 0 1;" \ "config.txt fat 0 1;" \ KERNEL_FILENAME " fat 0 1\0" #else #define ENV_DFU_SETTINGS "" #endif /* Console configuration */ #define CONFIG_SYS_CBSIZE 1024 /* Environment */ #define CONFIG_SYS_LOAD_ADDR 0x1000000 /* Shell */ /* ATAGs support for bootm/bootz */ #define CONFIG_SETUP_MEMORY_TAGS #define CONFIG_CMDLINE_TAG #define CONFIG_INITRD_TAG /* Environment */ #define ENV_DEVICE_SETTINGS \ "stdin=serial,usbkbd\0" \ "stdout=serial,vidconsole\0" \ "stderr=serial,vidconsole\0" #ifdef CONFIG_ARM64 #define FDT_HIGH "ffffffffffffffff" #define INITRD_HIGH "ffffffffffffffff" #else #define FDT_HIGH "ffffffff" #define INITRD_HIGH "ffffffff" #endif /* * Memory layout for where various images get loaded by boot scripts: * * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this. * * Older versions of the boot firmware place the firmware-loaded DTB at 0x100, * newer versions place it in high memory. So prevent U-Boot from doing its own * DTB + initrd relocation so that we won't accidentally relocate the initrd * over the firmware-loaded DTB and generally try to lay out things starting * from the bottom of RAM. * * kernel_addr_r has different constraints on ARM and Aarch64. For 32-bit ARM, * it must be within the first 128M of RAM in order for the kernel's * CONFIG_AUTO_ZRELADDR option to work. The kernel itself will be decompressed * to 0x8000 but the decompressor clobbers 0x4000-0x8000 as well. The * decompressor also likes to relocate itself to right past the end of the * decompressed kernel, so in total the sum of the compressed and and * decompressed kernel needs to be reserved. * * For Aarch64, the kernel image is uncompressed and must be loaded at * text_offset bytes (specified in the header of the Image) into a 2MB * boundary. The 'booti' command relocates the image if necessary. Linux uses * a default text_offset of 0x80000. In summary, loading at 0x80000 * satisfies all these constraints and reserving memory up to 0x02400000 * permits fairly large (roughly 36M) kernels. * * scriptaddr and pxefile_addr_r can be pretty much anywhere that doesn't * conflict with something else. Reserving 1M for each of them at * 0x02400000-0x02500000 and 0x02500000-0x02600000 should be plenty. * * On ARM, both the DTB and any possible initrd must be loaded such that they * fit inside the lowmem mapping in Linux. In practice, this usually means not * more than ~700M away from the start of the kernel image but this number can * be larger OR smaller depending on e.g. the 'vmalloc=xxxM' command line * parameter given to the kernel. So reserving memory from low to high * satisfies this constraint again. Reserving 1M at 0x02600000-0x02700000 for * the DTB leaves rest of the free RAM to the initrd starting at 0x02700000. * Even with the smallest possible CPU-GPU memory split of the CPU getting * only 64M, the remaining 25M starting at 0x02700000 should allow quite * large initrds before they start colliding with U-Boot. */ #define ENV_MEM_LAYOUT_SETTINGS \ "fdt_high=" FDT_HIGH "\0" \ "initrd_high=" INITRD_HIGH "\0" \ "kernel_addr_r=0x00080000\0" \ "scriptaddr=0x02400000\0" \ "pxefile_addr_r=0x02500000\0" \ "fdt_addr_r=0x02600000\0" \ "ramdisk_addr_r=0x02700000\0" #if CONFIG_IS_ENABLED(CMD_MMC) #define BOOT_TARGET_MMC(func) \ func(MMC, mmc, 0) \ func(MMC, mmc, 1) #else #define BOOT_TARGET_MMC(func) #endif #if CONFIG_IS_ENABLED(CMD_USB) #define BOOT_TARGET_USB(func) func(USB, usb, 0) #else #define BOOT_TARGET_USB(func) #endif #if CONFIG_IS_ENABLED(CMD_PXE) #define BOOT_TARGET_PXE(func) func(PXE, pxe, na) #else #define BOOT_TARGET_PXE(func) #endif #if CONFIG_IS_ENABLED(CMD_DHCP) #define BOOT_TARGET_DHCP(func) func(DHCP, dhcp, na) #else #define BOOT_TARGET_DHCP(func) #endif #define BOOT_TARGET_DEVICES(func) \ BOOT_TARGET_MMC(func) \ BOOT_TARGET_USB(func) \ BOOT_TARGET_PXE(func) \ BOOT_TARGET_DHCP(func) #include #define CONFIG_EXTRA_ENV_SETTINGS \ "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \ ENV_DEVICE_SETTINGS \ ENV_DFU_SETTINGS \ ENV_MEM_LAYOUT_SETTINGS \ BOOTENV #endif