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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2016 Intel Corp.
* Copyright 2016 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/cpu.h>
#include <assert.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 void flush_l1d_to_l2(void)
{
msr_t msr = rdmsr(MSR_POWER_MISC);
msr.lo |= FLUSH_DL1_L2;
wrmsr(MSR_POWER_MISC, msr);
}
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();
}
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