1 /* SPDX-License-Identifier: GPL-2.0+ */
5 * common parts used by B&R AM335x based boards
7 * Copyright (C) 2016 Hannes Schmelzer <oe5hpm@oevsv.at> -
8 * Bernecker & Rainer Industrieelektronik GmbH - http://www.br-automation.com
11 #ifndef __BUR_AM335X_COMMON_H__
12 #define __BUR_AM335X_COMMON_H__
13 /* ------------------------------------------------------------------------- */
15 /* legacy #defines for non DM bur-board */
17 #define CONFIG_SYS_NS16550_SERIAL
18 #define CONFIG_SYS_NS16550_REG_SIZE (-4)
19 #define CONFIG_SYS_NS16550_CLK (48000000)
20 #define CONFIG_SYS_NS16550_COM1 0x44e09000
22 #endif /* CONFIG_DM */
24 #define CONFIG_MAX_RAM_BANK_SIZE (1024 << 20) /* 1GB */
26 /* Timer information */
27 #define CONFIG_SYS_TIMERBASE 0x48040000 /* Use Timer2 */
29 #include <asm/arch/omap.h>
32 * SPL related defines. The Public RAM memory map the ROM defines the
33 * area between 0x402F0400 and 0x4030B800 as a download area and
34 * 0x4030B800 to 0x4030CE00 as a public stack area. The ROM also
35 * supports X-MODEM loading via UART, and we leverage this and then use
36 * Y-MODEM to load u-boot.img, when booted over UART. We must also include
37 * the scratch space that U-Boot uses in SRAM.
41 * Since SPL did pll and ddr initialization for us,
42 * we don't need to do it twice.
45 * ----------------------------------------------------------------------------
46 * DDR information. We say (for simplicity) that we have 1 bank,
47 * always, even when we have more. We always start at 0x80000000,
48 * and we place the initial stack pointer in our SRAM.
50 #define CONFIG_SYS_SDRAM_BASE 0x80000000
53 * Our platforms make use of SPL to initalize the hardware (primarily
54 * memory) enough for full U-Boot to be loaded. We also support Falcon
55 * Mode so that the Linux kernel can be booted directly from SPL
56 * instead, if desired. We make use of the general SPL framework found
57 * under common/spl/. Given our generally common memory map, we set a
58 * number of related defaults and sizes here.
61 * Place the image at the start of the ROM defined image space.
62 * We limit our size to the ROM-defined downloaded image area, and use the
63 * rest of the space for stack. We load U-Boot itself into memory at
64 * 0x80800000 for legacy reasons (to not conflict with older SPLs). We
65 * have our BSS be placed 1MiB after this, to allow for the default
66 * Linux kernel address of 0x80008000 to work, in the Falcon Mode case.
67 * We have the SPL malloc pool at the end of the BSS area.
69 * ----------------------------------------------------------------------------
72 /* General parts of the framework, required. */
74 #endif /* ! __BUR_AM335X_COMMON_H__ */