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/*
* (C) Copyright 2012-2016 Stephen Warren
*
* SPDX-License-Identifier: GPL-2.0
*/
#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_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
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