hob_verify.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <cbmem.h>
#include <console/console.h>
#include <fsp/util.h>
 
void fsp_verify_memory_init_hobs(void)
{
        struct range_entry fsp_mem;
        struct range_entry tolum;
 
        /* Verify the size of the TOLUM range */
        fsp_find_bootloader_tolum(&tolum);
        if (range_entry_size(&tolum) < cbmem_overhead_size()) {
                printk(BIOS_CRIT,
                        "FSP_BOOTLOADER_TOLUM_SIZE: 0x%08llx < 0x%08zx\n",
                        range_entry_size(&tolum), cbmem_overhead_size());
                die("FSP_BOOTLOADER_TOLUM_HOB too small!\n");
        }
 
        /* Verify the bootloader tolum is above the FSP reserved area */
        fsp_find_reserved_memory(&fsp_mem);
        if (range_entry_end(&tolum) <= range_entry_base(&fsp_mem)) {
                printk(BIOS_CRIT,
                        "TOLUM end: 0x%08llx != 0x%08llx: FSP rsvd base\n",
                        range_entry_end(&tolum), range_entry_base(&fsp_mem));
                die("FSP reserved region after BIOS TOLUM!\n");
        }
        if (range_entry_base(&tolum) < range_entry_end(&fsp_mem)) {
                printk(BIOS_CRIT,
                        "TOLUM base: 0x%08llx < 0x%08llx: FSP rsvd end\n",
                        range_entry_base(&tolum), range_entry_end(&fsp_mem));
                die("FSP reserved region overlaps BIOS TOLUM!\n");
        }
 
        /* Verify that the FSP reserved area immediately follows the BIOS
         * reserved area
         */
        if (range_entry_base(&tolum) != range_entry_end(&fsp_mem)) {
                printk(BIOS_CRIT,
                        "TOLUM base: 0x%08llx != 0x%08llx: FSP rsvd end\n",
                        range_entry_base(&tolum), range_entry_end(&fsp_mem));
                die("Space between FSP reserved region and BIOS TOLUM!\n");
        }
 
        if (range_entry_end(&tolum) != (uintptr_t)cbmem_top()) {
                printk(BIOS_CRIT, "TOLUM end: 0x%08llx != %p: cbmem_top\n",
                        range_entry_end(&tolum), cbmem_top());
                die("Space between cbmem_top and BIOS TOLUM!\n");
        }
}