temp_ram_exit.c

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <cbmem.h>
#include <cbfs.h>
#include <console/console.h>
#include <fsp/util.h>
 
asmlinkage void chipset_teardown_car_main(void)
{
        FSP_INFO_HEADER *fih;
        uint32_t status;
        FSP_TEMP_RAM_EXIT temp_ram_exit;
 
        /* CBMEM_ID_VBOOT_WORKBUF is used as vboot workbuffer.
         * Init CBMEM before loading fsp, to have buffer available */
        cbmem_initialize();
 
        void *fsp = cbfs_map("fsp.bin", NULL);
        if (!fsp) {
                die("Unable to locate fsp.bin\n");
        } else {
                /* This leaks a mapping which this code assumes is benign as
                 * the flash is memory mapped CPU's address space. */
 
                /* FIXME: the implementation of find_fsp is utter garbage
                   as it casts error values to FSP_INFO_HEADER pointers.
                   Checking for return values can only be done sanely once
                   that is fixed. */
                fih = find_fsp((uintptr_t)fsp);
        }
 
        temp_ram_exit = (FSP_TEMP_RAM_EXIT)(fih->TempRamExitEntryOffset +
                                                fih->ImageBase);
        printk(BIOS_DEBUG, "Calling TempRamExit: %p\n", temp_ram_exit);
        status = temp_ram_exit(NULL);
 
        if (status != FSP_SUCCESS) {
                printk(BIOS_CRIT, "TempRamExit returned 0x%08x\n", status);
                die("TempRamExit returned an error!\n");
        }
}