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 CFG_SYS_NS16550_CLK (48000000)
18 #define CFG_SYS_NS16550_COM1 0x44e09000
20 #endif /* CONFIG_DM */
22 #define CFG_MAX_RAM_BANK_SIZE (1024 << 20) /* 1GB */
24 /* Timer information */
25 #define CFG_SYS_TIMERBASE 0x48040000 /* Use Timer2 */
27 #include <asm/arch/omap.h>
30 * SPL related defines. The Public RAM memory map the ROM defines the
31 * area between 0x402F0400 and 0x4030B800 as a download area and
32 * 0x4030B800 to 0x4030CE00 as a public stack area. The ROM also
33 * supports X-MODEM loading via UART, and we leverage this and then use
34 * Y-MODEM to load u-boot.img, when booted over UART. We must also include
35 * the scratch space that U-Boot uses in SRAM.
39 * Since SPL did pll and ddr initialization for us,
40 * we don't need to do it twice.
43 * ----------------------------------------------------------------------------
44 * DDR information. We say (for simplicity) that we have 1 bank,
45 * always, even when we have more. We always start at 0x80000000,
46 * and we place the initial stack pointer in our SRAM.
48 #define CFG_SYS_SDRAM_BASE 0x80000000
51 * Our platforms make use of SPL to initalize the hardware (primarily
52 * memory) enough for full U-Boot to be loaded. We also support Falcon
53 * Mode so that the Linux kernel can be booted directly from SPL
54 * instead, if desired. We make use of the general SPL framework found
55 * under common/spl/. Given our generally common memory map, we set a
56 * number of related defaults and sizes here.
59 * Place the image at the start of the ROM defined image space.
60 * We limit our size to the ROM-defined downloaded image area, and use the
61 * rest of the space for stack. We load U-Boot itself into memory at
62 * 0x80800000 for legacy reasons (to not conflict with older SPLs). We
63 * have our BSS be placed 1MiB after this, to allow for the default
64 * Linux kernel address of 0x80008000 to work, in the Falcon Mode case.
65 * We have the SPL malloc pool at the end of the BSS area.
67 * ----------------------------------------------------------------------------
70 /* General parts of the framework, required. */
72 #endif /* ! __BUR_AM335X_COMMON_H__ */