f6c4eeab1a
Change-Id: Idb80b21bb5dc4b461f89a3414d51b7d98a8328d8 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/50521 Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#include <bootmem.h>
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#include <program_loading.h>
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#include <fit.h>
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#include <symbols.h>
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/**
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* Place the region in free memory range.
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*/
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static bool fit_place_mem(const struct range_entry *r, void *arg)
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{
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struct region *region = arg;
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resource_t start;
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if (range_entry_tag(r) != BM_MEM_RAM)
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return true;
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/* Linux 4.15 doesn't like 4KiB alignment. Align to 1 MiB for now. */
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start = ALIGN_UP(MAX(region->offset, range_entry_base(r)), 1 * MiB);
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if (start + region->size < range_entry_end(r)) {
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region->offset = (size_t)start;
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return false;
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}
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return true;
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}
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bool fit_payload_arch(struct prog *payload, struct fit_config_node *config,
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struct region *kernel,
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struct region *fdt,
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struct region *initrd)
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{
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void *arg = NULL;
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/**
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* The kernel ARM documentation recommends loading the kernel above 32MiB
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* in order to avoid the need to need to relocate prior to decompression.
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*/
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kernel->offset = (uintptr_t)_dram + 32 * MiB;
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/**
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* The code assumes that bootmem_walk provides a sorted list of memory
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* regions, starting from the lowest address.
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* The order of the calls here doesn't matter, as the placement is
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* enforced in the called functions.
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* For details check code on top.
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*/
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if (!bootmem_walk(fit_place_mem, kernel))
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return false;
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/* Mark as reserved for future allocations. */
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bootmem_add_range(kernel->offset, kernel->size, BM_MEM_PAYLOAD);
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/**
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* To ensure the fdt is not overwritten by the kernel decompressor, place
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* the fdt above the 128 MB from the start of RAM, as recommended by the
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* kernel documentation.
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*/
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fdt->offset = (uintptr_t)_dram + 128 * MiB;
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if (!bootmem_walk(fit_place_mem, fdt))
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return false;
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/* Mark as reserved for future allocations. */
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bootmem_add_range(fdt->offset, fdt->size, BM_MEM_PAYLOAD);
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/* Place INITRD */
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if (config->ramdisk) {
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initrd->offset = fdt->offset + fdt->size;
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if (!bootmem_walk(fit_place_mem, initrd))
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return false;
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/* Mark as reserved for future allocations. */
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bootmem_add_range(initrd->offset, initrd->size, BM_MEM_PAYLOAD);
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}
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/* Kernel expects FDT as argument */
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arg = (void *)fdt->offset;
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prog_set_entry(payload, (void *)kernel->offset, arg);
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bootmem_dump_ranges();
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return true;
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}
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