bootblock.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <arch/cache.h>
#include <bootblock_common.h>
#include <soc/clk.h>
#include <soc/wakeup.h>
#include <soc/cpu.h>
 
/* convenient shorthand (in MB) */
#define SRAM_START      (EXYNOS5_SRAM_BASE >> 20)
#define SRAM_SIZE       1
#define SRAM_END        (SRAM_START + SRAM_SIZE)        /* plus one... */
 
void bootblock_soc_init(void)
{
        if (get_wakeup_state() == WAKEUP_DIRECT) {
                wakeup();
                /* Never returns. */
        }
 
        /* set up dcache and MMU */
        mmu_init();
        mmu_disable_range(0, SRAM_START);
        mmu_config_range(SRAM_START, SRAM_SIZE, DCACHE_WRITEBACK);
        mmu_config_range(SRAM_END, 4096 - SRAM_END, DCACHE_OFF);
        dcache_mmu_enable();
 
        /* For most ARM systems, we have to initialize firmware media source
         * (ex, SPI, SD/MMC, or eMMC) now; but for Exynos platform, that is
         * already handled by iROM so there's no need to setup again.
         */
}