2 * (C) Copyright 2012-2016 Stephen Warren
4 * SPDX-License-Identifier: GPL-2.0
10 #include <linux/sizes.h>
11 #include <asm/arch/timer.h>
13 #if defined(CONFIG_TARGET_RPI_2) || defined(CONFIG_TARGET_RPI_3_32B)
14 #define CONFIG_SKIP_LOWLEVEL_INIT
17 /* Architecture, CPU, etc.*/
18 #define CONFIG_ARCH_CPU_INIT
20 /* Use SoC timer for AArch32, but architected timer for AArch64 */
22 #define CONFIG_SYS_TIMER_RATE 1000000
23 #define CONFIG_SYS_TIMER_COUNTER \
24 (&((struct bcm2835_timer_regs *)BCM2835_TIMER_PHYSADDR)->clo)
28 * 2835 is a SKU in a series for which the 2708 is the first or primary SoC,
29 * so 2708 has historically been used rather than a dedicated 2835 ID.
31 * We don't define a machine type for bcm2709/bcm2836 since the RPi Foundation
32 * chose to use someone else's previously registered machine ID (3139, MX51_GGC)
33 * rather than obtaining a valid ID:-/
35 * For the bcm2837, hopefully a machine type is not needed, since everything
39 #define CONFIG_MACH_TYPE MACH_TYPE_BCM2708
43 #define CONFIG_NR_DRAM_BANKS 1
44 #define CONFIG_SYS_SDRAM_BASE 0x00000000
46 #define CONFIG_SYS_TEXT_BASE 0x00080000
48 #define CONFIG_SYS_TEXT_BASE 0x00008000
50 #define CONFIG_SYS_UBOOT_BASE CONFIG_SYS_TEXT_BASE
52 * The board really has 256M. However, the VC (VideoCore co-processor) shares
53 * the RAM, and uses a configurable portion at the top. We tell U-Boot that a
54 * smaller amount of RAM is present in order to avoid stomping on the area
57 #define CONFIG_SYS_SDRAM_SIZE SZ_128M
58 #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + \
59 CONFIG_SYS_SDRAM_SIZE - \
60 GENERATED_GBL_DATA_SIZE)
61 #define CONFIG_SYS_MALLOC_LEN SZ_4M
62 #define CONFIG_SYS_MEMTEST_START 0x00100000
63 #define CONFIG_SYS_MEMTEST_END 0x00200000
64 #define CONFIG_LOADADDR 0x00200000
68 #define CONFIG_BCM2835_GPIO
70 #define CONFIG_LCD_DT_SIMPLEFB
71 #define CONFIG_VIDEO_BCM2835
74 #define CONFIG_TFTP_TSIZE
75 #define CONFIG_MISC_INIT_R
79 #if defined (CONFIG_BCM2837) || defined(CONFIG_TARGET_RPI_0_W)
80 #define CONFIG_BCM283X_MU_SERIAL
82 #define CONFIG_PL01X_SERIAL
85 /* Console configuration */
86 #define CONFIG_SYS_CBSIZE 1024
89 #define CONFIG_ENV_SIZE SZ_16K
90 #define CONFIG_ENV_VARS_UBOOT_CONFIG
91 #define CONFIG_SYS_LOAD_ADDR 0x1000000
92 #define CONFIG_PREBOOT "usb start"
95 #define CONFIG_CMDLINE_EDITING
97 /* ATAGs support for bootm/bootz */
98 #define CONFIG_SETUP_MEMORY_TAGS
99 #define CONFIG_CMDLINE_TAG
100 #define CONFIG_INITRD_TAG
102 #include <config_distro_defaults.h>
105 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
106 #define ENV_DEVICE_SETTINGS \
107 "stdin=serial,usbkbd\0" \
108 "stdout=serial,vidconsole\0" \
109 "stderr=serial,vidconsole\0"
112 * Memory layout for where various images get loaded by boot scripts:
114 * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this.
116 * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's
117 * binary firmware loads a DT to address 0x100, so we choose this address to
118 * match it. This allows custom boot scripts to pass this DT on to Linux
119 * simply by not over-writing the data at this address. When using U-Boot,
120 * U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW
121 * and loads its own DT from disk (triggered by boot.scr or extlinux.conf).
123 * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
124 * something else. Put it low in memory to avoid conflicts.
126 * kernel_addr_r must be within the first 128M of RAM in order for the
127 * kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
128 * decompress itself to 0x8000 after the start of RAM, kernel_addr_r
129 * should not overlap that area, or the kernel will have to copy itself
130 * somewhere else before decompression. Similarly, the address of any other
131 * data passed to the kernel shouldn't overlap the start of RAM. Pushing
132 * this up to 16M allows for a sizable kernel to be decompressed below the
133 * compressed load address.
135 * scriptaddr can be pretty much anywhere that doesn't conflict with something
136 * else. Choosing 32M allows for the compressed kernel to be up to 16M.
138 * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
139 * for any boot script to be up to 1M, which is hopefully plenty.
141 #define ENV_MEM_LAYOUT_SETTINGS \
142 "fdt_high=ffffffff\0" \
143 "initrd_high=ffffffff\0" \
144 "fdt_addr_r=0x00000100\0" \
145 "pxefile_addr_r=0x00100000\0" \
146 "kernel_addr_r=0x01000000\0" \
147 "scriptaddr=0x02000000\0" \
148 "ramdisk_addr_r=0x02100000\0" \
150 #define BOOT_TARGET_DEVICES(func) \
155 #include <config_distro_bootcmd.h>
157 #define CONFIG_EXTRA_ENV_SETTINGS \
158 "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
159 ENV_DEVICE_SETTINGS \
160 ENV_MEM_LAYOUT_SETTINGS \