54c39bf104
Some blkmap memory mapped devices might have to be relevant even after U-Boot passes control to the next image as part of the platform boot. An example of such a mapping would be an OS installer ISO image, information for which has to be provided to the OS kernel. Use the 'preserve' attribute for such mappings. The code for adding a pmem node to the device-tree then checks if this attribute is set, and adds a node only for mappings which have this attribute. Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org> Reviewed-by: Tobias Waldekranz <tobias@waldekranz.com> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* blkmap helper function
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*
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* Copyright (c) 2023, Linaro Limited
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*/
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#include <blk.h>
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#include <blkmap.h>
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#include <dm/device.h>
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#include <dm/device-internal.h>
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int blkmap_create_ramdisk(const char *label, ulong image_addr, ulong image_size,
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struct udevice **devp)
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{
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int ret;
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lbaint_t blknum;
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struct blkmap *bm;
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struct blk_desc *desc;
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struct udevice *bm_dev;
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ret = blkmap_create(label, &bm_dev);
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if (ret) {
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log_err("failed to create blkmap\n");
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return ret;
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}
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bm = dev_get_plat(bm_dev);
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desc = dev_get_uclass_plat(bm->blk);
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blknum = image_size >> desc->log2blksz;
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ret = blkmap_map_pmem(bm_dev, 0, blknum, image_addr, true);
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if (ret) {
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log_err("Unable to map %#llx at block %d : %d\n",
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(unsigned long long)image_addr, 0, ret);
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goto err;
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}
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log_info("Block %d+0x" LBAF " mapped to %#llx\n", 0, blknum,
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(unsigned long long)image_addr);
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ret = device_probe(bm->blk);
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if (ret)
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goto err;
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if (devp)
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*devp = bm_dev;
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return 0;
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err:
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blkmap_destroy(bm_dev);
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return ret;
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}
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