1 /*
2  * ti_armv7_common.h
3  *
4  * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
5  *
6  * SPDX-License-Identifier:	GPL-2.0+
7  *
8  * The various ARMv7 SoCs from TI all share a number of IP blocks when
9  * implementing a given feature.  Rather than define these in every
10  * board or even SoC common file, we define a common file to be re-used
11  * in all cases.  While technically true that some of these details are
12  * configurable at the board design, they are common throughout SoC
13  * reference platforms as well as custom designs and become de facto
14  * standards.
15  */
16 
17 #ifndef __CONFIG_TI_ARMV7_COMMON_H__
18 #define __CONFIG_TI_ARMV7_COMMON_H__
19 
20 /* Support both device trees and ATAGs. */
21 #define CONFIG_CMDLINE_TAG
22 #define CONFIG_SETUP_MEMORY_TAGS
23 #define CONFIG_INITRD_TAG
24 
25 /*
26  * Our DDR memory always starts at 0x80000000 and U-Boot shall have
27  * relocated itself to higher in memory by the time this value is used.
28  * However, set this to a 32MB offset to allow for easier Linux kernel
29  * booting as the default is often used as the kernel load address.
30  */
31 #define CONFIG_SYS_LOAD_ADDR		0x82000000
32 
33 /*
34  * We setup defaults based on constraints from the Linux kernel, which should
35  * also be safe elsewhere.  We have the default load at 32MB into DDR (for
36  * the kernel), FDT above 128MB (the maximum location for the end of the
37  * kernel), and the ramdisk 512KB above that (allowing for hopefully never
38  * seen large trees).  We say all of this must be within the first 256MB
39  * as that will normally be within the kernel lowmem and thus visible via
40  * bootm_size and we only run on platforms with 256MB or more of memory.
41  */
42 #define DEFAULT_LINUX_BOOT_ENV \
43 	"loadaddr=0x82000000\0" \
44 	"kernel_addr_r=0x82000000\0" \
45 	"fdtaddr=0x88000000\0" \
46 	"fdt_addr_r=0x88000000\0" \
47 	"rdaddr=0x88080000\0" \
48 	"ramdisk_addr_r=0x88080000\0" \
49 	"scriptaddr=0x80000000\0" \
50 	"pxefile_addr_r=0x80100000\0" \
51 	"bootm_size=0x10000000\0" \
52 	"boot_fdt=try\0"
53 
54 #define DEFAULT_FIT_TI_ARGS \
55 	"boot_fit=0\0" \
56 	"fit_loadaddr=0x87000000\0" \
57 	"fit_bootfile=fitImage\0" \
58 	"update_to_fit=setenv loadaddr ${fit_loadaddr}; setenv bootfile ${fit_bootfile}\0" \
59 	"loadfit=run args_mmc; bootm ${loadaddr}#${fdtfile};\0" \
60 
61 /*
62  * DDR information.  If the CONFIG_NR_DRAM_BANKS is not defined,
63  * we say (for simplicity) that we have 1 bank, always, even when
64  * we have more.  We always start at 0x80000000, and we place the
65  * initial stack pointer in our SRAM. Otherwise, we can define
66  * CONFIG_NR_DRAM_BANKS before including this file.
67  */
68 #ifndef CONFIG_NR_DRAM_BANKS
69 #define CONFIG_NR_DRAM_BANKS		1
70 #endif
71 #define CONFIG_SYS_SDRAM_BASE		0x80000000
72 
73 #ifndef CONFIG_SYS_INIT_SP_ADDR
74 #define CONFIG_SYS_INIT_SP_ADDR         (NON_SECURE_SRAM_END - \
75 						GENERATED_GBL_DATA_SIZE)
76 #endif
77 
78 /* Timer information. */
79 #define CONFIG_SYS_PTV			2	/* Divisor: 2^(PTV+1) => 8 */
80 
81 /*
82  * Disable DM_* for SPL build and can be re-enabled after adding
83  * DM support in SPL
84  */
85 #ifdef CONFIG_SPL_BUILD
86 #undef CONFIG_DM_I2C
87 #endif
88 
89 /* I2C IP block */
90 #define CONFIG_I2C
91 #ifndef CONFIG_DM_I2C
92 #define CONFIG_SYS_I2C
93 #else
94 /*
95  * Enable CONFIG_DM_I2C_COMPAT temporarily until all the i2c client
96  * devices are adopted to DM
97  */
98 #define CONFIG_DM_I2C_COMPAT
99 #endif
100 
101 /* McSPI IP block */
102 #define CONFIG_SPI
103 
104 /* GPIO block */
105 
106 /*
107  * The following are general good-enough settings for U-Boot.  We set a
108  * large malloc pool as we generally have a lot of DDR, and we opt for
109  * function over binary size in the main portion of U-Boot as this is
110  * generally easily constrained later if needed.  We enable the config
111  * options that give us information in the environment about what board
112  * we are on so we do not need to rely on the command prompt.  We set a
113  * console baudrate of 115200 and use the default baud rate table.
114  */
115 #define CONFIG_SYS_MALLOC_LEN		SZ_32M
116 #define CONFIG_ENV_OVERWRITE		/* Overwrite ethaddr / serial# */
117 
118 /* As stated above, the following choices are optional. */
119 
120 /* We set the max number of command args high to avoid HUSH bugs. */
121 #define CONFIG_SYS_MAXARGS		64
122 
123 /* Console I/O Buffer Size */
124 #define CONFIG_SYS_CBSIZE		1024
125 /* Boot Argument Buffer Size */
126 #define CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE
127 
128 /*
129  * When we have SPI, NOR or NAND flash we expect to be making use of
130  * mtdparts, both for ease of use in U-Boot and for passing information
131  * on to the Linux kernel.
132  */
133 #if defined(CONFIG_SPI_BOOT) || defined(CONFIG_NOR) || defined(CONFIG_NAND) || defined(CONFIG_NAND_DAVINCI)
134 #define CONFIG_MTD_DEVICE		/* Required for mtdparts */
135 #endif
136 
137 /*
138  * Our platforms make use of SPL to initalize the hardware (primarily
139  * memory) enough for full U-Boot to be loaded. We make use of the general
140  * SPL framework found under common/spl/.  Given our generally common memory
141  * map, we set a number of related defaults and sizes here.
142  */
143 #if !defined(CONFIG_NOR_BOOT) && \
144 	!(defined(CONFIG_QSPI_BOOT) && defined(CONFIG_AM43XX))
145 
146 /*
147  * We also support Falcon Mode so that the Linux kernel can be booted
148  * directly from SPL. This is not currently available on HS devices.
149  */
150 
151 /*
152  * Place the image at the start of the ROM defined image space (per
153  * CONFIG_SPL_TEXT_BASE and we limit our size to the ROM-defined
154  * downloaded image area minus 1KiB for scratch space.  We initalize DRAM as
155  * soon as we can so that we can place stack, malloc and BSS there.  We load
156  * U-Boot itself into memory at 0x80800000 for legacy reasons (to not conflict
157  * with older SPLs).  We have our BSS be placed 2MiB after this, to allow for
158  * the default Linux kernel address of 0x80008000 to work with most sized
159  * kernels, in the Falcon Mode case.  We have the SPL malloc pool at the end
160  * of the BSS area.  We suggest that the stack be placed at 32MiB after the
161  * start of DRAM to allow room for all of the above (handled in Kconfig).
162  */
163 #ifndef CONFIG_SPL_BSS_START_ADDR
164 #define CONFIG_SPL_BSS_START_ADDR	0x80a00000
165 #define CONFIG_SPL_BSS_MAX_SIZE		0x80000		/* 512 KB */
166 #endif
167 #ifndef CONFIG_SYS_SPL_MALLOC_START
168 #define CONFIG_SYS_SPL_MALLOC_START	(CONFIG_SPL_BSS_START_ADDR + \
169 					 CONFIG_SPL_BSS_MAX_SIZE)
170 #define CONFIG_SYS_SPL_MALLOC_SIZE	SZ_8M
171 #endif
172 #ifndef CONFIG_SPL_MAX_SIZE
173 #define CONFIG_SPL_MAX_SIZE		(SRAM_SCRATCH_SPACE_ADDR - \
174 					 CONFIG_SPL_TEXT_BASE)
175 #endif
176 
177 
178 /* FAT sd card locations. */
179 #define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION	1
180 #define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME	"u-boot.img"
181 
182 #ifdef CONFIG_SPL_OS_BOOT
183 /* FAT */
184 #define CONFIG_SPL_FS_LOAD_KERNEL_NAME		"uImage"
185 #define CONFIG_SPL_FS_LOAD_ARGS_NAME		"args"
186 
187 /* RAW SD card / eMMC */
188 #define CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR	0x1700  /* address 0x2E0000 */
189 #define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR	0x1500  /* address 0x2A0000 */
190 #define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS	0x200   /* 256KiB */
191 #endif
192 
193 /* General parts of the framework, required. */
194 
195 #ifdef CONFIG_NAND
196 #define CONFIG_SPL_NAND_BASE
197 #define CONFIG_SPL_NAND_DRIVERS
198 #define CONFIG_SPL_NAND_ECC
199 #define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
200 #endif
201 #endif /* !CONFIG_NOR_BOOT */
202 
203 /* Generic Environment Variables */
204 
205 #ifdef CONFIG_CMD_NET
206 #define NETARGS \
207 	"static_ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}" \
208 		"::off\0" \
209 	"nfsopts=nolock\0" \
210 	"rootpath=/export/rootfs\0" \
211 	"netloadimage=tftp ${loadaddr} ${bootfile}\0" \
212 	"netloadfdt=tftp ${fdtaddr} ${fdtfile}\0" \
213 	"netargs=setenv bootargs console=${console} " \
214 		"${optargs} " \
215 		"root=/dev/nfs " \
216 		"nfsroot=${serverip}:${rootpath},${nfsopts} rw " \
217 		"ip=dhcp\0" \
218 	"netboot=echo Booting from network ...; " \
219 		"setenv autoload no; " \
220 		"dhcp; " \
221 		"run netloadimage; " \
222 		"run netloadfdt; " \
223 		"run netargs; " \
224 		"bootz ${loadaddr} - ${fdtaddr}\0"
225 #else
226 #define NETARGS ""
227 #endif
228 
229 #endif	/* __CONFIG_TI_ARMV7_COMMON_H__ */
230