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Diffstat (limited to 'include/configs/rpi.h')
| -rw-r--r-- | include/configs/rpi.h | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/include/configs/rpi.h b/include/configs/rpi.h new file mode 100644 index 0000000..77d2d54 --- /dev/null +++ b/include/configs/rpi.h @@ -0,0 +1,192 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * (C) Copyright 2012-2016 Stephen Warren + */ + +#ifndef __CONFIG_H +#define __CONFIG_H + +#include <linux/sizes.h> +#include <asm/arch/timer.h> + +#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_SYS_MEMTEST_START 0x00100000 +#define CONFIG_SYS_MEMTEST_END 0x00200000 +#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 + +/* Console configuration */ +#define CONFIG_SYS_CBSIZE 1024 + +/* Environment */ +#define CONFIG_ENV_SIZE SZ_16K +#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 <config_distro_bootcmd.h> + +#define CONFIG_EXTRA_ENV_SETTINGS \ + "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \ + ENV_DEVICE_SETTINGS \ + ENV_MEM_LAYOUT_SETTINGS \ + BOOTENV + + +#endif |