mirror of
https://git.codelinaro.org/clo/qsdk/oss/boot/u-boot-2016.git
synced 2025-12-10 07:44:53 +01:00
d3da2a207c
- u-boot text region + pgtable requires
800KB. Hence adjusted text base address
to 0x4A92000, so that the text region + pgtable
fits at the last 800KB of 2MB memory space, leaving
200KB above them for other regions
- Size of Heap region is reduced to 1MB from 1.5MB
- Maple uses gmac controller for Ethernet DMA process,
which does not require non-cached memory, hence we
can avoid reserving 1MB for noncached memory and the
same can used for other components.
- Right now, 256KB of memory was used from stack
for env reloc/save functionalities which makes the
SP extend beyond 2MB. Hence, modified them to
allocate memory from Heap.
- With this patchset, the u-boot fits into 2MB space
and the rest 2MB can be used for other components
Change-Id: I962d86d81b1c52cbef575f974924d16ec6e3db89
Signed-off-by: Karthick Jeyaraman <kjeyaram@codeaurora.org>
119 lines
2.3 KiB
C
119 lines
2.3 KiB
C
/*
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* (c) Copyright 2011 by Tigris Elektronik GmbH
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*
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* Author:
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* Maximilian Schwerin <mvs@tigris.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <environment.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <memalign.h>
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#include <search.h>
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#include <errno.h>
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#include <fat.h>
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#include <mmc.h>
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char *env_name_spec = "FAT";
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env_t *env_ptr;
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DECLARE_GLOBAL_DATA_PTR;
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int env_init(void)
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{
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/* use default */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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return 0;
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}
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#ifdef CONFIG_CMD_SAVEENV
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int saveenv(void)
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{
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env_t env_new;
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block_dev_desc_t *dev_desc = NULL;
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disk_partition_t info;
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int dev, part;
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int err;
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loff_t size;
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err = env_export(&env_new);
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if (err)
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return err;
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part = get_device_and_partition(FAT_ENV_INTERFACE,
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FAT_ENV_DEVICE_AND_PART,
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&dev_desc, &info, 1);
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if (part < 0)
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return 1;
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dev = dev_desc->dev;
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if (fat_set_blk_dev(dev_desc, &info) != 0) {
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printf("\n** Unable to use %s %d:%d for saveenv **\n",
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FAT_ENV_INTERFACE, dev, part);
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return 1;
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}
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err = file_fat_write(FAT_ENV_FILE, (void *)&env_new, 0, sizeof(env_t),
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&size);
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if (err == -1) {
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printf("\n** Unable to write \"%s\" from %s%d:%d **\n",
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FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
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return 1;
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}
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puts("done\n");
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return 0;
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}
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#endif /* CONFIG_CMD_SAVEENV */
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void env_relocate_spec(void)
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{
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char *buf = NULL;
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block_dev_desc_t *dev_desc = NULL;
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disk_partition_t info;
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int dev, part;
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int err;
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buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
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if (!buf) {
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printf("Error: Cannot allocate %d bytes\n", CONFIG_ENV_SIZE);
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goto err_env_relocate;
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}
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part = get_device_and_partition(FAT_ENV_INTERFACE,
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FAT_ENV_DEVICE_AND_PART,
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&dev_desc, &info, 1);
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if (part < 0)
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goto err_env_relocate;
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dev = dev_desc->dev;
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if (fat_set_blk_dev(dev_desc, &info) != 0) {
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printf("\n** Unable to use %s %d:%d for loading the env **\n",
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FAT_ENV_INTERFACE, dev, part);
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goto err_env_relocate;
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}
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err = file_fat_read(FAT_ENV_FILE, buf, CONFIG_ENV_SIZE);
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if (err == -1) {
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printf("\n** Unable to read \"%s\" from %s%d:%d **\n",
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FAT_ENV_FILE, FAT_ENV_INTERFACE, dev, part);
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goto err_env_relocate;
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}
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env_import(buf, 1);
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free(buf);
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return;
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err_env_relocate:
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set_default_env(NULL);
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if (buf)
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free(buf);
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}
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