/*
- * (C) Copyright 2012,2015 Stephen Warren
+ * (C) Copyright 2012-2016 Stephen Warren
*
* SPDX-License-Identifier: GPL-2.0
*/
#ifndef __CONFIG_H
#define __CONFIG_H
-#include "rpi-common.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_ARCH_CPU_INIT
+
+/* 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
+#ifdef CONFIG_ARM64
+#define CONFIG_SYS_TEXT_BASE 0x00080000
+#else
+#define CONFIG_SYS_TEXT_BASE 0x00008000
+#endif
+#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
+
+/* Devices */
+/* GPIO */
+#define CONFIG_BCM2835_GPIO
+/* LCD */
+#define CONFIG_LCD_DT_SIMPLEFB
+#define CONFIG_VIDEO_BCM2835
+
+#ifdef CONFIG_CMD_USB
+#define CONFIG_TFTP_TSIZE
+#define CONFIG_MISC_INIT_R
+#endif
+
+/* Console UART */
+#ifdef CONFIG_BCM2837
+#define CONFIG_BCM283X_MU_SERIAL
+#else
+#define CONFIG_PL01X_SERIAL
+#endif
+
+/* Console configuration */
+#define CONFIG_SYS_CBSIZE 1024
+
+/* Environment */
+#define CONFIG_ENV_SIZE SZ_16K
+#define CONFIG_ENV_VARS_UBOOT_CONFIG
+#define CONFIG_SYS_LOAD_ADDR 0x1000000
+#define CONFIG_PREBOOT "usb start"
+
+/* Shell */
+#define CONFIG_CMDLINE_EDITING
+
+/* ATAGs support for bootm/bootz */
+#define CONFIG_SETUP_MEMORY_TAGS
+#define CONFIG_CMDLINE_TAG
+#define CONFIG_INITRD_TAG
+
+#include <config_distro_defaults.h>
+
+/* Environment */
+#define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+#define ENV_DEVICE_SETTINGS \
+ "stdin=serial,usbkbd\0" \
+ "stdout=serial,vidconsole\0" \
+ "stderr=serial,vidconsole\0"
+
+/*
+ * 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.
+ *
+ * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's
+ * binary firmware loads a DT to address 0x100, so we choose this address to
+ * match it. This allows custom boot scripts to pass this DT on to Linux
+ * simply by not over-writing the data at this address. When using U-Boot,
+ * U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW
+ * and loads its own DT from disk (triggered by boot.scr or extlinux.conf).
+ *
+ * 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 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.
+ *
+ * scriptaddr can be pretty much anywhere that doesn't conflict with something
+ * else. Choosing 32M allows for the compressed kernel to be up to 16M.
+ *
+ * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
+ * for any boot script to be up to 1M, which is hopefully plenty.
+ */
+#define ENV_MEM_LAYOUT_SETTINGS \
+ "fdt_high=ffffffff\0" \
+ "initrd_high=ffffffff\0" \
+ "fdt_addr_r=0x00000100\0" \
+ "pxefile_addr_r=0x00100000\0" \
+ "kernel_addr_r=0x01000000\0" \
+ "scriptaddr=0x02000000\0" \
+ "ramdisk_addr_r=0x02100000\0" \
+
+#define BOOT_TARGET_DEVICES(func) \
+ func(MMC, mmc, 0) \
+ func(USB, usb, 0) \
+ func(PXE, pxe, na) \
+ func(DHCP, dhcp, na)
+#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
projects / people / ms / u-boot.git / blobdiff