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_USB_HOST_ETHER
75 #define CONFIG_USB_ETHER_SMSC95XX
76 #define CONFIG_TFTP_TSIZE
77 #define CONFIG_MISC_INIT_R
78 #define CONFIG_SYS_USB_EVENT_POLL
83 #define CONFIG_BCM283X_MU_SERIAL
85 #define CONFIG_PL01X_SERIAL
88 /* Console configuration */
89 #define CONFIG_SYS_CBSIZE 1024
90 #define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \
91 sizeof(CONFIG_SYS_PROMPT) + 16)
94 #define CONFIG_ENV_SIZE SZ_16K
95 #define CONFIG_ENV_VARS_UBOOT_CONFIG
96 #define CONFIG_SYS_LOAD_ADDR 0x1000000
97 #define CONFIG_PREBOOT "usb start"
100 #define CONFIG_SYS_MAXARGS 16
101 #define CONFIG_CMDLINE_EDITING
103 /* ATAGs support for bootm/bootz */
104 #define CONFIG_SETUP_MEMORY_TAGS
105 #define CONFIG_CMDLINE_TAG
106 #define CONFIG_INITRD_TAG
108 #include <config_distro_defaults.h>
111 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
112 #define ENV_DEVICE_SETTINGS \
113 "stdin=serial,usbkbd\0" \
114 "stdout=serial,vidconsole\0" \
115 "stderr=serial,vidconsole\0"
118 * Memory layout for where various images get loaded by boot scripts:
120 * I suspect address 0 is used as the SMP pen on the RPi2, so avoid this.
122 * fdt_addr_r simply shouldn't overlap anything else. However, the RPi's
123 * binary firmware loads a DT to address 0x100, so we choose this address to
124 * match it. This allows custom boot scripts to pass this DT on to Linux
125 * simply by not over-writing the data at this address. When using U-Boot,
126 * U-Boot (and scripts it executes) typicaly ignore the DT loaded by the FW
127 * and loads its own DT from disk (triggered by boot.scr or extlinux.conf).
129 * pxefile_addr_r can be pretty much anywhere that doesn't conflict with
130 * something else. Put it low in memory to avoid conflicts.
132 * kernel_addr_r must be within the first 128M of RAM in order for the
133 * kernel's CONFIG_AUTO_ZRELADDR option to work. Since the kernel will
134 * decompress itself to 0x8000 after the start of RAM, kernel_addr_r
135 * should not overlap that area, or the kernel will have to copy itself
136 * somewhere else before decompression. Similarly, the address of any other
137 * data passed to the kernel shouldn't overlap the start of RAM. Pushing
138 * this up to 16M allows for a sizable kernel to be decompressed below the
139 * compressed load address.
141 * scriptaddr can be pretty much anywhere that doesn't conflict with something
142 * else. Choosing 32M allows for the compressed kernel to be up to 16M.
144 * ramdisk_addr_r simply shouldn't overlap anything else. Choosing 33M allows
145 * for any boot script to be up to 1M, which is hopefully plenty.
147 #define ENV_MEM_LAYOUT_SETTINGS \
148 "fdt_high=ffffffff\0" \
149 "initrd_high=ffffffff\0" \
150 "fdt_addr_r=0x00000100\0" \
151 "pxefile_addr_r=0x00100000\0" \
152 "kernel_addr_r=0x01000000\0" \
153 "scriptaddr=0x02000000\0" \
154 "ramdisk_addr_r=0x02100000\0" \
156 #define BOOT_TARGET_DEVICES(func) \
161 #include <config_distro_bootcmd.h>
163 #define CONFIG_EXTRA_ENV_SETTINGS \
164 "dhcpuboot=usb start; dhcp u-boot.uimg; bootm\0" \
165 ENV_DEVICE_SETTINGS \
166 ENV_MEM_LAYOUT_SETTINGS \