1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
* (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_USB_HOST_ETHER
#define CONFIG_USB_ETHER_SMSC95XX
#define CONFIG_TFTP_TSIZE
#define CONFIG_MISC_INIT_R
#define CONFIG_SYS_USB_EVENT_POLL
#endif
/* Console UART */
#ifdef CONFIG_BCM2837
#define CONFIG_BCM283X_MU_SERIAL
#else
#define CONFIG_PL01X_SERIAL
#endif
/* 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_ENV_VARS_UBOOT_CONFIG
#define CONFIG_SYS_LOAD_ADDR 0x1000000
#define CONFIG_PREBOOT "usb start"
/* Shell */
#define CONFIG_SYS_MAXARGS 16
#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
|
