car.c

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/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <assert.h>
#include <intelblocks/msr.h>
#include <program_loading.h>
#include <soc/cpu.h>
 
/*
 * This file supports the necessary hoops one needs to jump through since
 * early FSP component and early stages are running from cache-as-ram.
 */
 
static inline int is_car_addr(uintptr_t addr)
{
        return ((addr >= CONFIG_DCACHE_RAM_BASE) &&
                (addr < (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE)));
}
 
void platform_segment_loaded(uintptr_t start, size_t size, int flags)
{
        /* Bail out if this is not the final segment. */
        if (!(flags & SEG_FINAL))
                return;
 
        char start_car_check = is_car_addr(start);
        char end_car_check = is_car_addr(start + size - 1);
 
        /* Bail out if loaded program segment does not lie in CAR region. */
        if (!start_car_check && !end_car_check)
                return;
 
        /* Loaded program segment should lie entirely within CAR region. */
        assert(start_car_check && end_car_check);
 
        flush_l1d_to_l2();
}