mirror of
https://github.com/brain-hackers/u-boot-brain
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2570cc6430
Linux kernel for arm32 requires dtb and initrd to be placed in low memory to work properly. This requirement is described in chapter 4b) and 5) in Linux documentation (Documentation/arm/booting.rst). There is an issue on arm32 with 2GB of memory that bootm_size is bigger than Linux lowmem (for example with VMSPLIT_3G). That's why limit bootm size on these systems not to be above 768MB. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2014 - 2019 Xilinx, Inc.
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* Michal Simek <michal.simek@xilinx.com>
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*/
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#include <common.h>
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#include <env.h>
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#include <log.h>
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#include <asm/sections.h>
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#include <dm/uclass.h>
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#include <i2c.h>
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#include <linux/sizes.h>
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#include "board.h"
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#if defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET)
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int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
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{
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int ret = -EINVAL;
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struct udevice *dev;
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ofnode eeprom;
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eeprom = ofnode_get_chosen_node("xlnx,eeprom");
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if (!ofnode_valid(eeprom))
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return -ENODEV;
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debug("%s: Path to EEPROM %s\n", __func__,
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ofnode_read_chosen_string("xlnx,eeprom"));
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ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, &dev);
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if (ret)
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return ret;
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ret = dm_i2c_read(dev, CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET, ethaddr, 6);
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if (ret)
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debug("%s: I2C EEPROM MAC address read failed\n", __func__);
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else
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debug("%s: I2C EEPROM MAC %pM\n", __func__, ethaddr);
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return ret;
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}
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#endif
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#if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
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void *board_fdt_blob_setup(void)
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{
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static void *fdt_blob;
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#if !defined(CONFIG_VERSAL_NO_DDR) && !defined(CONFIG_ZYNQMP_NO_DDR)
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fdt_blob = (void *)CONFIG_XILINX_OF_BOARD_DTB_ADDR;
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if (fdt_magic(fdt_blob) == FDT_MAGIC)
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return fdt_blob;
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debug("DTB is not passed via %p\n", fdt_blob);
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#endif
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#ifdef CONFIG_SPL_BUILD
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/* FDT is at end of BSS unless it is in a different memory region */
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if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
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fdt_blob = (ulong *)&_image_binary_end;
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else
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fdt_blob = (ulong *)&__bss_end;
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#else
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/* FDT is at end of image */
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fdt_blob = (ulong *)&_end;
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#endif
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if (fdt_magic(fdt_blob) == FDT_MAGIC)
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return fdt_blob;
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debug("DTB is also not passed via %p\n", fdt_blob);
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return NULL;
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}
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#endif
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int board_late_init_xilinx(void)
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{
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u32 ret = 0;
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phys_size_t bootm_size = gd->ram_size;
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if (CONFIG_IS_ENABLED(ARCH_ZYNQ))
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bootm_size = min(bootm_size, (phys_size_t)(SZ_512M + SZ_256M));
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ret |= env_set_hex("script_offset_f", CONFIG_BOOT_SCRIPT_OFFSET);
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ret |= env_set_addr("bootm_low", (void *)gd->ram_base);
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ret |= env_set_addr("bootm_size", (void *)bootm_size);
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if (ret)
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printf("%s: Saving run time variables FAILED\n", __func__);
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return 0;
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}
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