+/* SPDX-License-Identifier: GPL-2.0 */
/*
- * (C) Copyright 2012 Stephen Warren
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * (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.*/
-#define CONFIG_SYS_GENERIC_BOARD
-#define CONFIG_BCM2835
-#define CONFIG_ARCH_CPU_INIT
-#define CONFIG_SYS_DCACHE_OFF
+
+/* 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_NR_DRAM_BANKS 1
#define CONFIG_SYS_SDRAM_BASE 0x00000000
-#define CONFIG_SYS_TEXT_BASE 0x00008000
#define CONFIG_SYS_UBOOT_BASE CONFIG_SYS_TEXT_BASE
/*
* The board really has 256M. However, the VC (VideoCore co-processor) shares
#define CONFIG_SYS_MEMTEST_END 0x00200000
#define CONFIG_LOADADDR 0x00200000
-/* Flash */
-#define CONFIG_SYS_NO_FLASH
-
/* Devices */
/* GPIO */
#define CONFIG_BCM2835_GPIO
/* LCD */
-#define CONFIG_LCD
#define CONFIG_LCD_DT_SIMPLEFB
-#define LCD_BPP LCD_COLOR16
-/*
- * Prevent allocation of RAM for FB; the real FB address is queried
- * dynamically from the VideoCore co-processor, and comes from RAM
- * not owned by the ARM CPU.
- */
-#define CONFIG_FB_ADDR 0
#define CONFIG_VIDEO_BCM2835
-#define CONFIG_SYS_WHITE_ON_BLACK
-
-/* SD/MMC configuration */
-#define CONFIG_GENERIC_MMC
-#define CONFIG_MMC
-#define CONFIG_SDHCI
-#define CONFIG_MMC_SDHCI_IO_ACCESSORS
-#define CONFIG_BCM2835_SDHCI
-#define CONFIG_CMD_USB
#ifdef CONFIG_CMD_USB
-#define CONFIG_USB_DWC2
-#define CONFIG_USB_DWC2_REG_ADDR 0x20980000
-#define CONFIG_USB_STORAGE
-#define CONFIG_USB_HOST_ETHER
-#define CONFIG_USB_ETHER_SMSC95XX
-#define CONFIG_MISC_INIT_R
+#define CONFIG_TFTP_TSIZE
#endif
-/* Console UART */
-#define CONFIG_PL01X_SERIAL
-#define CONFIG_CONS_INDEX 0
-#define CONFIG_BAUDRATE 115200
-
/* Console configuration */
#define CONFIG_SYS_CBSIZE 1024
-#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \
- sizeof(CONFIG_SYS_PROMPT) + 16)
/* Environment */
#define CONFIG_ENV_SIZE SZ_16K
-#define CONFIG_ENV_IS_IN_FAT
-#define FAT_ENV_INTERFACE "mmc"
-#define FAT_ENV_DEVICE_AND_PART "0:1"
-#define FAT_ENV_FILE "uboot.env"
-#define CONFIG_FAT_WRITE
-#define CONFIG_ENV_VARS_UBOOT_CONFIG
#define CONFIG_SYS_LOAD_ADDR 0x1000000
-#define CONFIG_CONSOLE_MUX
-#define CONFIG_SYS_CONSOLE_IS_IN_ENV
/* Shell */
-#define CONFIG_SYS_MAXARGS 8
-#define CONFIG_SYS_PROMPT "U-Boot> "
-#define CONFIG_COMMAND_HISTORY
-
-/* Commands */
-#include <config_cmd_default.h>
-#define CONFIG_CMD_GPIO
-#define CONFIG_CMD_MMC
-#define CONFIG_PARTITION_UUIDS
-#define CONFIG_CMD_PART
-
-/* Device tree support */
-#define CONFIG_OF_BOARD_SETUP
+
/* ATAGs support for bootm/bootz */
#define CONFIG_SETUP_MEMORY_TAGS
#define CONFIG_CMDLINE_TAG
#define CONFIG_INITRD_TAG
-#include <config_distro_defaults.h>
-
-/* Some things don't make sense on this HW or yet */
-#undef CONFIG_CMD_FPGA
-
/* Environment */
#define ENV_DEVICE_SETTINGS \
- "stdin=serial,lcd\0" \
- "stdout=serial,lcd\0" \
- "stderr=serial,lcd\0"
+ "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:
*
- * scriptaddr can be pretty much anywhere that doesn't conflict with something
- * else. Put it low in memory to avoid conflicts.
+ * 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.
*
- * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
- * something else. Put it low in memory to avoid conflicts.
+ * 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.
*
- * kernel_addr_r must be within the first 128M of RAM in order for the
- * kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
- * decompress itself to 0x8000 after the start of RAM, kernel_addr_r
- * should not overlap that area, or the kernel will have to copy itself
- * somewhere else before decompression. Similarly, the address of any other
- * data passed to the kernel shouldn't overlap the start of RAM. Pushing
- * this up to 16M allows for a sizable kernel to be decompressed below the
- * compressed load address.
+ * 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.
*
- * fdt_addr_r simply shouldn't overlap anything else. Choosing 32M allows for
- * the compressed kernel to be up to 16M too.
+ * 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.
*
- * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
- * for the FDT/DTB to be up to 1M, which is hopefully 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 \
- "scriptaddr=0x00000000\0" \
- "pxefile_addr_r=0x00100000\0" \
- "kernel_addr_r=0x01000000\0" \
- "fdt_addr_r=0x02000000\0" \
- "ramdisk_addr_r=0x02100000\0" \
+ "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) \
- func(MMC, mmc, 0) \
- func(USB, usb, 0) \
- func(PXE, pxe, na) \
- func(DHCP, dhcp, na)
+ 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
-#define CONFIG_BOOTDELAY 2
#endif
projects / oweals / u-boot.git / blobdiff