u-boot/drivers/misc/fsl_sec_mon.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

163 lines
3.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2015 Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <fsl_sec_mon.h>
static u32 get_sec_mon_state(void)
{
struct ccsr_sec_mon_regs *sec_mon_regs = (void *)
(CONFIG_SYS_SEC_MON_ADDR);
return sec_mon_in32(&sec_mon_regs->hp_stat) & HPSR_SSM_ST_MASK;
}
static int set_sec_mon_state_non_sec(void)
{
u32 sts;
int timeout = 10;
struct ccsr_sec_mon_regs *sec_mon_regs = (void *)
(CONFIG_SYS_SEC_MON_ADDR);
sts = get_sec_mon_state();
switch (sts) {
/*
* If initial state is check or Non-Secure, then set the Software
* Security Violation Bit and transition to Non-Secure State.
*/
case HPSR_SSM_ST_CHECK:
printf("SEC_MON state transitioning to Non Secure.\n");
sec_mon_setbits32(&sec_mon_regs->hp_com, HPCOMR_SW_SV);
/* polling loop till SEC_MON is in Non Secure state */
while (timeout) {
sts = get_sec_mon_state();
if ((sts & HPSR_SSM_ST_MASK) ==
HPSR_SSM_ST_NON_SECURE)
break;
udelay(10);
timeout--;
}
if (timeout == 0) {
printf("SEC_MON state transition timeout.\n");
return -1;
}
break;
/*
* If initial state is Trusted, Secure or Soft-Fail, then first set
* the Software Security Violation Bit and transition to Soft-Fail
* State.
*/
case HPSR_SSM_ST_TRUST:
case HPSR_SSM_ST_SECURE:
case HPSR_SSM_ST_SOFT_FAIL:
printf("SEC_MON state transitioning to Soft Fail.\n");
sec_mon_setbits32(&sec_mon_regs->hp_com, HPCOMR_SW_SV);
/* polling loop till SEC_MON is in Soft-Fail state */
while (timeout) {
sts = get_sec_mon_state();
if ((sts & HPSR_SSM_ST_MASK) ==
HPSR_SSM_ST_SOFT_FAIL)
break;
udelay(10);
timeout--;
}
if (timeout == 0) {
printf("SEC_MON state transition timeout.\n");
return -1;
}
timeout = 10;
/*
* If SSM Soft Fail to Non-Secure State Transition
* disable is not set, then set SSM_ST bit and
* transition to Non-Secure State.
*/
if ((sec_mon_in32(&sec_mon_regs->hp_com) &
HPCOMR_SSM_SFNS_DIS) == 0) {
printf("SEC_MON state transitioning to Non Secure.\n");
sec_mon_setbits32(&sec_mon_regs->hp_com, HPCOMR_SSM_ST);
/* polling loop till SEC_MON is in Non Secure*/
while (timeout) {
sts = get_sec_mon_state();
if ((sts & HPSR_SSM_ST_MASK) ==
HPSR_SSM_ST_NON_SECURE)
break;
udelay(10);
timeout--;
}
if (timeout == 0) {
printf("SEC_MON state transition timeout.\n");
return -1;
}
}
break;
default:
printf("SEC_MON already in Non Secure state.\n");
return 0;
}
return 0;
}
static int set_sec_mon_state_soft_fail(void)
{
u32 sts;
int timeout = 10;
struct ccsr_sec_mon_regs *sec_mon_regs = (void *)
(CONFIG_SYS_SEC_MON_ADDR);
printf("SEC_MON state transitioning to Soft Fail.\n");
sec_mon_setbits32(&sec_mon_regs->hp_com, HPCOMR_SW_FSV);
/* polling loop till SEC_MON is in Soft-Fail state */
while (timeout) {
sts = get_sec_mon_state();
if ((sts & HPSR_SSM_ST_MASK) ==
HPSR_SSM_ST_SOFT_FAIL)
break;
udelay(10);
timeout--;
}
if (timeout == 0) {
printf("SEC_MON state transition timeout.\n");
return -1;
}
return 0;
}
int set_sec_mon_state(u32 state)
{
int ret = -1;
switch (state) {
case HPSR_SSM_ST_NON_SECURE:
ret = set_sec_mon_state_non_sec();
break;
case HPSR_SSM_ST_SOFT_FAIL:
ret = set_sec_mon_state_soft_fail();
break;
default:
printf("SEC_MON state transition not supported.\n");
return 0;
}
return ret;
}