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/*
*
* Security related functions for OMAP5 class devices
*
* (C) Copyright 2016
* Texas Instruments, <www.ti.com>
*
* Daniel Allred <d-allred@ti.com>
* Harinarayan Bhatta <harinarayan@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <stdarg.h>
#include <asm/arch/sys_proto.h>
#include <asm/omap_common.h>
#include <asm/omap_sec_common.h>
#include <asm/spl.h>
#include <spl.h>
/* Index for signature PPA-based TI HAL APIs */
#define PPA_HAL_SERVICES_START_INDEX (0x200)
#define PPA_SERV_HAL_SETUP_SEC_RESVD_REGION (PPA_HAL_SERVICES_START_INDEX + 25)
#define PPA_SERV_HAL_SETUP_EMIF_FW_REGION (PPA_HAL_SERVICES_START_INDEX + 26)
#define PPA_SERV_HAL_LOCK_EMIF_FW (PPA_HAL_SERVICES_START_INDEX + 27)
static u32 get_sec_mem_start(void)
{
u32 sec_mem_start = CONFIG_TI_SECURE_EMIF_REGION_START;
u32 sec_mem_size = CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE;
/*
* Total reserved region is all contiguous with protected
* region coming first, followed by the non-secure region.
* If 0x0 start address is given, we simply put the reserved
* region at the end of the external DRAM.
*/
if (sec_mem_start == 0)
sec_mem_start =
(CONFIG_SYS_SDRAM_BASE +
(omap_sdram_size() - sec_mem_size));
return sec_mem_start;
}
int secure_emif_firewall_setup(uint8_t region_num, uint32_t start_addr,
uint32_t size, uint32_t access_perm,
uint32_t initiator_perm)
{
int result = 1;
/*
* Call PPA HAL API to do any other general firewall
* configuration for regions 1-6 of the EMIF firewall.
*/
debug("%s: regionNum = %x, startAddr = %x, size = %x", __func__,
region_num, start_addr, size);
result = secure_rom_call(
PPA_SERV_HAL_SETUP_EMIF_FW_REGION, 0, 0, 4,
(start_addr & 0xFFFFFFF0) | (region_num & 0x0F),
size, access_perm, initiator_perm);
if (result != 0) {
puts("Secure EMIF Firewall Setup failed!\n");
debug("Return Value = %x\n", result);
}
return result;
}
#if (CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE < \
CONFIG_TI_SECURE_EMIF_PROTECTED_REGION_SIZE)
#error "TI Secure EMIF: Protected size cannot be larger than total size."
#endif
int secure_emif_reserve(void)
{
int result = 1;
u32 sec_mem_start = get_sec_mem_start();
u32 sec_prot_size = CONFIG_TI_SECURE_EMIF_PROTECTED_REGION_SIZE;
/* If there is no protected region, there is no reservation to make */
if (sec_prot_size == 0)
return 0;
/*
* Call PPA HAL API to reserve a chunk of EMIF SDRAM
* for secure world use. This region should be carved out
* from use by any public code. EMIF firewall region 7
* will be used to protect this block of memory.
*/
result = secure_rom_call(
PPA_SERV_HAL_SETUP_SEC_RESVD_REGION,
0, 0, 2, sec_mem_start, sec_prot_size);
if (result != 0) {
puts("SDRAM Firewall: Secure memory reservation failed!\n");
debug("Return Value = %x\n", result);
}
return result;
}
int secure_emif_firewall_lock(void)
{
int result = 1;
/*
* Call PPA HAL API to lock the EMIF firewall configurations.
* After this API is called, none of the PPA HAL APIs for
* configuring the EMIF firewalls will be usable again (that
* is, calls to those APIs will return failure and have no
* effect).
*/
result = secure_rom_call(
PPA_SERV_HAL_LOCK_EMIF_FW,
0, 0, 0);
if (result != 0) {
puts("Secure EMIF Firewall Lock failed!\n");
debug("Return Value = %x\n", result);
}
return result;
}
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