omap-secure.c

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/*
 * OMAP Secure API infrastructure.
 *
 * Copyright (C) 2011 Texas Instruments, Inc.
 *  Santosh Shilimkar <[email protected]>
 *
 *
 * This program is free software,you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/memblock.h>

#include <asm/cacheflush.h>
#include <asm/memblock.h>

#include <plat/omap-secure.h>
#include "omap-secure.h"

static phys_addr_t omap_secure_memblock_base;

u32 omap_secure_dispatcher(u32 idx, u32 flag, u32 nargs, u32 arg1, u32 arg2,
                             u32 arg3, u32 arg4)
{
    u32 ret;
    u32 param[5];

    param[0] = nargs;
    param[1] = arg1;
    param[2] = arg2;
    param[3] = arg3;
    param[4] = arg4;

    /*
     * Secure API needs physical address
     * pointer for the parameters
     */
    flush_cache_all();
    outer_clean_range(__pa(param), __pa(param + 5));
    ret = omap_smc2(idx, flag, __pa(param));

    return ret;
}

/* Allocate the memory to save secure ram */
int __init omap_secure_ram_reserve_memblock(void)
{
    u32 size = OMAP_SECURE_RAM_STORAGE;

    size = ALIGN(size, SECTION_SIZE);
    omap_secure_memblock_base = arm_memblock_steal(size, SECTION_SIZE);

    return 0;
}

phys_addr_t omap_secure_ram_mempool_base(void)
{
    return omap_secure_memblock_base;
}