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refactor(stm32mp1): remove unused refcount helper functions

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Remove stm32mp_incr_shrefcnt(), stm32mp_decr_shrefcnt(),
stm32mp_incr_refcnt() and stm32mp_decr_refcnt() that are unused.
The file is then just removed.

Change-Id: I09ee23c02317df5d8f71cbc355d3ed4a67ce2749
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Signed-off-by: Yann Gautier <yann.gautier@st.com>
This commit is contained in:
Yann Gautier 2022-01-19 14:01:52 +01:00
parent 356ed96118
commit e1bfbf8ad3
2 changed files with 0 additions and 75 deletions
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74
plat/st/common/include/stm32mp_shres_helpers.h
View file

@ -1,74 +0,0 @@
/*
* Copyright (C) 2018-2019, STMicroelectronics - All Rights Reserved
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef STM32MP_SHRES_HELPERS_H
#define STM32MP_SHRES_HELPERS_H
#include <stdint.h>
#include <common/debug.h>
/*
* Shared reference counter: increments by 2 on secure increment
* request, decrements by 2 on secure decrement request. Bit #0
* is set to 1 on non-secure increment request and reset to 0 on
* non-secure decrement request. The counter initializes to
* either 0, 1 or 2 upon their expect default state.
* Counters saturates once above UINT_MAX / 2.
*/
#define SHREFCNT_NONSECURE_FLAG 0x1UL
#define SHREFCNT_SECURE_STEP 0x2UL
#define SHREFCNT_MAX (UINT32_MAX / 2)
/* Return 1 if refcnt increments from 0, else return 0 */
static inline int stm32mp_incr_shrefcnt(unsigned int *refcnt, bool secure)
{
int rc = !*refcnt;
if (secure) {
*refcnt += SHREFCNT_SECURE_STEP;
if (*refcnt >= SHREFCNT_MAX) {
panic();
}
} else {
*refcnt |= SHREFCNT_NONSECURE_FLAG;
}
return rc;
}
/* Return 1 if refcnt decrements to 0, else return 0 */
static inline int stm32mp_decr_shrefcnt(unsigned int *refcnt, bool secure)
{
int rc = 0;
if (secure) {
if (*refcnt < SHREFCNT_MAX) {
if (*refcnt < SHREFCNT_SECURE_STEP) {
panic();
}
*refcnt -= SHREFCNT_SECURE_STEP;
rc = !*refcnt;
}
} else {
rc = (*refcnt == SHREFCNT_NONSECURE_FLAG) ? 1 : 0;
*refcnt &= ~SHREFCNT_NONSECURE_FLAG;
}
return rc;
}
static inline int stm32mp_incr_refcnt(unsigned int *refcnt)
{
return stm32mp_incr_shrefcnt(refcnt, true);
}
static inline int stm32mp_decr_refcnt(unsigned int *refcnt)
{
return stm32mp_decr_shrefcnt(refcnt, true);
}
#endif /* STM32MP_SHRES_HELPERS_H */

1
plat/st/stm32mp1/stm32mp1_def.h
View file

@ -22,7 +22,6 @@
#include <stm32mp_auth.h>
#include <stm32mp_common.h>
#include <stm32mp_dt.h>
#include <stm32mp_shres_helpers.h>
#include <stm32mp1_dbgmcu.h>
#include <stm32mp1_private.h>
#include <stm32mp1_shared_resources.h>