dcca74b0d5
For systems with more complicated firmware, the firmware memory map may vary significantly based on a number of factors. This makes it difficult to pick a hardcoded load address. Add a command for finding an available address with sufficient room to load the provided path. Signed-off-by: Matthew Garrett <mgarrett@aurora.tech> Reviewed-by: Simon Glass <sjg@chromium.org>
88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Aurora Innovation, Inc. Copyright 2022.
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*
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*/
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#include <blk.h>
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#include <config.h>
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#include <command.h>
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#include <env.h>
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#include <fs.h>
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#include <lmb.h>
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#include <asm/global_data.h>
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DECLARE_GLOBAL_DATA_PTR;
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int do_addr_find(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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struct lmb_region *mem, *reserved;
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const char *filename;
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struct lmb lmb;
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loff_t size;
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int ret;
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int i, j;
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if (!gd->fdt_blob) {
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log_err("No FDT setup\n");
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return CMD_RET_FAILURE;
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}
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if (fs_set_blk_dev(argv[1], argc >= 3 ? argv[2] : NULL, FS_TYPE_FAT)) {
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log_err("Can't set block device\n");
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return CMD_RET_FAILURE;
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}
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if (argc >= 4) {
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filename = argv[3];
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} else {
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filename = env_get("bootfile");
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if (!filename) {
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log_err("No boot file defined\n");
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return CMD_RET_FAILURE;
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}
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}
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ret = fs_size(filename, &size);
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if (ret != 0) {
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log_err("Failed to get file size\n");
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return CMD_RET_FAILURE;
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}
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lmb_init_and_reserve(&lmb, gd->bd, (void *)gd->fdt_blob);
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mem = &lmb.memory;
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reserved = &lmb.reserved;
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for (i = 0; i < mem->cnt; i++) {
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unsigned long long start, end;
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start = mem->region[i].base;
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end = mem->region[i].base + mem->region[i].size - 1;
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if ((start + size) > end)
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continue;
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for (j = 0; j < reserved->cnt; j++) {
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if ((reserved->region[j].base + reserved->region[j].size) < start)
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continue;
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if ((start + size) > reserved->region[j].base)
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start = reserved->region[j].base + reserved->region[j].size;
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}
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if ((start + size) <= end) {
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env_set_hex("loadaddr", start);
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debug("Set loadaddr to 0x%llx\n", start);
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return CMD_RET_SUCCESS;
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}
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}
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log_err("Failed to find enough RAM for 0x%llx bytes\n", size);
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return CMD_RET_FAILURE;
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}
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U_BOOT_CMD(
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addr_find, 7, 1, do_addr_find,
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"find a load address suitable for a file",
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"<interface> [<dev[:part]>] <filename>\n"
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"- find a consecutive region of memory sufficiently large to hold\n"
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" the file called 'filename' from 'dev' on 'interface'. If\n"
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" successful, 'loadaddr' will be set to the located address."
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);
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