1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * ti_armv7_common.h
4  *
5  * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
6  *
7  * The various ARMv7 SoCs from TI all share a number of IP blocks when
8  * implementing a given feature.  Rather than define these in every
9  * board or even SoC common file, we define a common file to be re-used
10  * in all cases.  While technically true that some of these details are
11  * configurable at the board design, they are common throughout SoC
12  * reference platforms as well as custom designs and become de facto
13  * standards.
14  */
15 
16 #ifndef __CONFIG_TI_ARMV7_COMMON_H__
17 #define __CONFIG_TI_ARMV7_COMMON_H__
18 
19 /* Support both device trees and ATAGs. */
20 #define CONFIG_CMDLINE_TAG
21 #define CONFIG_SETUP_MEMORY_TAGS
22 #define CONFIG_INITRD_TAG
23 
24 /*
25  * Our DDR memory always starts at 0x80000000 and U-Boot shall have
26  * relocated itself to higher in memory by the time this value is used.
27  * However, set this to a 32MB offset to allow for easier Linux kernel
28  * booting as the default is often used as the kernel load address.
29  */
30 #define CONFIG_SYS_LOAD_ADDR		0x82000000
31 
32 /*
33  * We setup defaults based on constraints from the Linux kernel, which should
34  * also be safe elsewhere.  We have the default load at 32MB into DDR (for
35  * the kernel), FDT above 128MB (the maximum location for the end of the
36  * kernel), and the ramdisk 512KB above that (allowing for hopefully never
37  * seen large trees).  We say all of this must be within the first 256MB
38  * as that will normally be within the kernel lowmem and thus visible via
39  * bootm_size and we only run on platforms with 256MB or more of memory.
40  */
41 #define DEFAULT_LINUX_BOOT_ENV \
42 	"loadaddr=0x82000000\0" \
43 	"kernel_addr_r=0x82000000\0" \
44 	"fdtaddr=0x88000000\0" \
45 	"fdt_addr_r=0x88000000\0" \
46 	"rdaddr=0x88080000\0" \
47 	"ramdisk_addr_r=0x88080000\0" \
48 	"scriptaddr=0x80000000\0" \
49 	"pxefile_addr_r=0x80100000\0" \
50 	"bootm_size=0x10000000\0" \
51 	"boot_fdt=try\0"
52 
53 #define DEFAULT_FIT_TI_ARGS \
54 	"boot_fit=0\0" \
55 	"fit_loadaddr=0x90000000\0" \
56 	"fit_bootfile=fitImage\0" \
57 	"update_to_fit=setenv loadaddr ${fit_loadaddr}; setenv bootfile ${fit_bootfile}\0" \
58 	"loadfit=run args_mmc; bootm ${loadaddr}#${fdtfile};\0" \
59 
60 /*
61  * DDR information.  If the CONFIG_NR_DRAM_BANKS is not defined,
62  * we say (for simplicity) that we have 1 bank, always, even when
63  * we have more.  We always start at 0x80000000, and we place the
64  * initial stack pointer in our SRAM. Otherwise, we can define
65  * CONFIG_NR_DRAM_BANKS before including this file.
66  */
67 #define CONFIG_SYS_SDRAM_BASE		0x80000000
68 
69 #ifndef CONFIG_SYS_INIT_SP_ADDR
70 #define CONFIG_SYS_INIT_SP_ADDR         (NON_SECURE_SRAM_END - \
71 						GENERATED_GBL_DATA_SIZE)
72 #endif
73 
74 /* Timer information. */
75 #define CONFIG_SYS_PTV			2	/* Divisor: 2^(PTV+1) => 8 */
76 
77 /* If DM_I2C, enable non-DM I2C support */
78 #if !defined(CONFIG_DM_I2C)
79 #define CONFIG_I2C
80 #define CONFIG_SYS_I2C
81 #endif
82 
83 /*
84  * The following are general good-enough settings for U-Boot.  We set a
85  * large malloc pool as we generally have a lot of DDR, and we opt for
86  * function over binary size in the main portion of U-Boot as this is
87  * generally easily constrained later if needed.  We enable the config
88  * options that give us information in the environment about what board
89  * we are on so we do not need to rely on the command prompt.  We set a
90  * console baudrate of 115200 and use the default baud rate table.
91  */
92 #define CONFIG_SYS_MALLOC_LEN		SZ_32M
93 #define CONFIG_ENV_OVERWRITE		/* Overwrite ethaddr / serial# */
94 
95 /* As stated above, the following choices are optional. */
96 
97 /* We set the max number of command args high to avoid HUSH bugs. */
98 #define CONFIG_SYS_MAXARGS		64
99 
100 /* Console I/O Buffer Size */
101 #define CONFIG_SYS_CBSIZE		1024
102 /* Boot Argument Buffer Size */
103 #define CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE
104 
105 /*
106  * When we have SPI, NOR or NAND flash we expect to be making use of
107  * mtdparts, both for ease of use in U-Boot and for passing information
108  * on to the Linux kernel.
109  */
110 
111 /*
112  * Our platforms make use of SPL to initalize the hardware (primarily
113  * memory) enough for full U-Boot to be loaded. We make use of the general
114  * SPL framework found under common/spl/.  Given our generally common memory
115  * map, we set a number of related defaults and sizes here.
116  */
117 #if !defined(CONFIG_NOR_BOOT) && \
118 	!(defined(CONFIG_QSPI_BOOT) && defined(CONFIG_AM43XX))
119 
120 /*
121  * We also support Falcon Mode so that the Linux kernel can be booted
122  * directly from SPL. This is not currently available on HS devices.
123  */
124 
125 /*
126  * Place the image at the start of the ROM defined image space (per
127  * CONFIG_SPL_TEXT_BASE and we limit our size to the ROM-defined
128  * downloaded image area minus 1KiB for scratch space.  We initalize DRAM as
129  * soon as we can so that we can place stack, malloc and BSS there.  We load
130  * U-Boot itself into memory at 0x80800000 for legacy reasons (to not conflict
131  * with older SPLs).  We have our BSS be placed 2MiB after this, to allow for
132  * the default Linux kernel address of 0x80008000 to work with most sized
133  * kernels, in the Falcon Mode case.  We have the SPL malloc pool at the end
134  * of the BSS area.  We suggest that the stack be placed at 32MiB after the
135  * start of DRAM to allow room for all of the above (handled in Kconfig).
136  */
137 #ifndef CONFIG_SPL_BSS_START_ADDR
138 #define CONFIG_SPL_BSS_START_ADDR	0x80a00000
139 #define CONFIG_SPL_BSS_MAX_SIZE		0x80000		/* 512 KB */
140 #endif
141 #ifndef CONFIG_SYS_SPL_MALLOC_START
142 #define CONFIG_SYS_SPL_MALLOC_START	(CONFIG_SPL_BSS_START_ADDR + \
143 					 CONFIG_SPL_BSS_MAX_SIZE)
144 #define CONFIG_SYS_SPL_MALLOC_SIZE	SZ_8M
145 #endif
146 #ifndef CONFIG_SPL_MAX_SIZE
147 #define CONFIG_SPL_MAX_SIZE		(SRAM_SCRATCH_SPACE_ADDR - \
148 					 CONFIG_SPL_TEXT_BASE)
149 #endif
150 
151 
152 /* FAT sd card locations. */
153 #define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION	1
154 #ifndef CONFIG_SPL_FS_LOAD_PAYLOAD_NAME
155 #define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME	"u-boot.img"
156 #endif
157 
158 #ifdef CONFIG_SPL_OS_BOOT
159 /* FAT */
160 #define CONFIG_SPL_FS_LOAD_KERNEL_NAME		"uImage"
161 #define CONFIG_SPL_FS_LOAD_ARGS_NAME		"args"
162 
163 /* RAW SD card / eMMC */
164 #define CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR	0x1700  /* address 0x2E0000 */
165 #define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR	0x1500  /* address 0x2A0000 */
166 #define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS	0x200   /* 256KiB */
167 #endif
168 
169 /* General parts of the framework, required. */
170 
171 #ifdef CONFIG_NAND
172 #define CONFIG_SPL_NAND_BASE
173 #define CONFIG_SPL_NAND_DRIVERS
174 #define CONFIG_SPL_NAND_ECC
175 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
176 #endif
177 #endif /* !CONFIG_NOR_BOOT */
178 
179 /* Generic Environment Variables */
180 
181 #ifdef CONFIG_CMD_NET
182 #define NETARGS \
183 	"static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}" \
184 		"::off\0" \
185 	"nfsopts=nolock\0" \
186 	"rootpath=/export/rootfs\0" \
187 	"netloadimage=tftp ${loadaddr} ${bootfile}\0" \
188 	"netloadfdt=tftp ${fdtaddr} ${fdtfile}\0" \
189 	"netargs=setenv bootargs console=${console} " \
190 		"${optargs} " \
191 		"root=/dev/nfs " \
192 		"nfsroot=${serverip}:${rootpath},${nfsopts} rw " \
193 		"ip=dhcp\0" \
194 	"netboot=echo Booting from network ...; " \
195 		"setenv autoload no; " \
196 		"dhcp; " \
197 		"run netloadimage; " \
198 		"run netloadfdt; " \
199 		"run netargs; " \
200 		"bootz ${loadaddr} - ${fdtaddr}\0"
201 #else
202 #define NETARGS ""
203 #endif
204 
205 #endif	/* __CONFIG_TI_ARMV7_COMMON_H__ */
206