omap-secure.c
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/*
* OMAP Secure API infrastructure.
*
* Copyright (C) 2011 Texas Instruments, Inc.
* Santosh Shilimkar <santosh.shilimkar@ti.com>
*
*
* 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 <mach/omap-secure.h>
static phys_addr_t omap_secure_memblock_base;
/**
* omap_sec_dispatcher: Routine to dispatch low power secure
* service routines
* @idx: The HAL API index
* @flag: The flag indicating criticality of operation
* @nargs: Number of valid arguments out of four.
* @arg1, arg2, arg3 args4: Parameters passed to secure API
*
* Return the non-zero error value on failure.
*/
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, SZ_1M);
omap_secure_memblock_base = arm_memblock_steal(size, SZ_1M);
return 0;
}
phys_addr_t omap_secure_ram_mempool_base(void)
{
return omap_secure_memblock_base;
}