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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2018 Stefan Roese <sr@denx.de>
- */
- #include <common.h>
- #include <malloc.h>
- #include <linux/io.h>
- #include <linux/sizes.h>
- DECLARE_GLOBAL_DATA_PTR;
- int dram_init(void)
- {
- #ifdef CONFIG_SKIP_LOWLEVEL_INIT
- gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, SZ_256M);
- #endif
- return 0;
- }
- int last_stage_init(void)
- {
- void *src, *dst;
- src = malloc(SZ_64K);
- dst = malloc(SZ_64K);
- if (!src || !dst) {
- printf("Can't allocate buffer for cache cleanup copy!\n");
- return 0;
- }
- /*
- * It has been noticed, that sometimes the d-cache is not in a
- * "clean-state" when U-Boot is running on MT7688. This was
- * detected when using the ethernet driver (which uses d-cache)
- * and a TFTP command does not complete. Copying an area of 64KiB
- * in DDR at a very late bootup time in U-Boot, directly before
- * calling into the prompt, seems to fix this issue.
- */
- memcpy(dst, src, SZ_64K);
- free(src);
- free(dst);
- return 0;
- }
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