rcar_gen3: drivers: Change to restore timer counter value at resume
Changed to save and restore cntpct_el0 using memory mapped
register for generic timer when System Suspend and Resume.
Reported by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Signed-off-by: Toshiyuki Ogasahara <toshiyuki.ogasahara.bo@hitachi.com>
Signed-off-by: Yoshifumi Hosoya <yoshifumi.hosoya.wj@renesas.com>
Change-Id: I40fd9f5434c4d52b320cd1d20322b9b8e4e67155
diff --git a/drivers/renesas/rcar/console/rcar_printf.c b/drivers/renesas/rcar/console/rcar_printf.c
index 2a6e2c0..e75b9f4 100644
--- a/drivers/renesas/rcar/console/rcar_printf.c
+++ b/drivers/renesas/rcar/console/rcar_printf.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ * Copyright (c) 2015-2019, Renesas Electronics Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -94,9 +94,6 @@
sizeof(t_log->header.head));
t_log->header.index = 0U;
t_log->header.size = 0U;
-#ifndef IMAGE_BL2
- rcar_stack_generic_timer[INDEX_TIMER_COUNT] = 0U;
-#endif
}
rcar_lock_init();
diff --git a/drivers/renesas/rcar/console/rcar_printf.h b/drivers/renesas/rcar/console/rcar_printf.h
index bcb00c3..5da70e6 100644
--- a/drivers/renesas/rcar/console/rcar_printf.h
+++ b/drivers/renesas/rcar/console/rcar_printf.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ * Copyright (c) 2015-2019, Renesas Electronics Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -12,8 +12,4 @@
int32_t rcar_set_log_data(int32_t c);
int32_t rcar_log_init(void);
-#if IMAGE_BL31
-extern uint64_t rcar_stack_generic_timer[5];
-#endif
-
#endif /* RCAR_PRINTF_H */
diff --git a/drivers/renesas/rcar/pwrc/call_sram.S b/drivers/renesas/rcar/pwrc/call_sram.S
index 7c96b7e..aa8644c 100644
--- a/drivers/renesas/rcar/pwrc/call_sram.S
+++ b/drivers/renesas/rcar/pwrc/call_sram.S
@@ -1,21 +1,13 @@
/*
- * Copyright (c) 2018, Renesas Electronics Corporation. All rights reserved.
+ * Copyright (c) 2015-2019, Renesas Electronics Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <asm_macros.S>
-#include "rcar_def.h"
.global rcar_pwrc_switch_stack
-.global rcar_pwrc_save_generic_timer
-.global rcar_pwrc_restore_generic_timer
-
-#define OFFSET_SP_X9_X10 (0x00)
-#define OFFSET_CNTFID0 (0x10)
-#define OFFSET_CNTPCT_EL0 (0x18)
-#define OFFSET_TIMER_COUNT (0x20)
/*
* x0 : jump address,
@@ -54,37 +46,3 @@
ldp x29, x30, [sp,#-16]
ret
endfunc rcar_pwrc_switch_stack
-
-/* x0 : stack pointer base address */
-func rcar_pwrc_save_generic_timer
-
- stp x9, x10, [x0, #OFFSET_SP_X9_X10]
-
- /* save CNTFID0 and cntpct_el0 */
- mov_imm x10, (RCAR_CNTC_BASE + CNTFID_OFF)
- ldr x9, [x10]
- mrs x10, cntpct_el0
- stp x9, x10, [x0, #OFFSET_CNTFID0]
-
- ldp x9, x10, [x0, #OFFSET_SP_X9_X10]
-
- ret
-endfunc rcar_pwrc_save_generic_timer
-
-/* x0 : Stack pointer base address */
-func rcar_pwrc_restore_generic_timer
-
- stp x9, x10, [x0, #OFFSET_SP_X9_X10]
-
- /* restore CNTFID0 and cntpct_el0 */
- ldr x10, [x0, #OFFSET_CNTFID0]
- mov_imm x9, (RCAR_CNTC_BASE + CNTFID_OFF)
- str x10, [x9]
- ldp x9, x10, [x0, #OFFSET_CNTPCT_EL0]
- add x9, x9, x10
- str x9, [x0, #OFFSET_TIMER_COUNT]
-
- ldp x9, x10, [x0, #OFFSET_SP_X9_X10]
-
- ret
-endfunc rcar_pwrc_restore_generic_timer
diff --git a/drivers/renesas/rcar/pwrc/pwrc.c b/drivers/renesas/rcar/pwrc/pwrc.c
index e223f07..d97e593 100644
--- a/drivers/renesas/rcar/pwrc/pwrc.c
+++ b/drivers/renesas/rcar/pwrc/pwrc.c
@@ -13,6 +13,7 @@
#include <lib/bakery_lock.h>
#include <lib/mmio.h>
#include <lib/xlat_tables/xlat_tables_v2.h>
+#include <plat/common/platform.h>
#include "iic_dvfs.h"
#include "rcar_def.h"
@@ -126,6 +127,14 @@
#define RST_MODEMR (RST_BASE + 0x0060U)
#define RST_MODEMR_BIT0 (0x00000001U)
+#define RCAR_CNTCR_OFF (0x00U)
+#define RCAR_CNTCVL_OFF (0x08U)
+#define RCAR_CNTCVU_OFF (0x0CU)
+#define RCAR_CNTFID_OFF (0x20U)
+
+#define RCAR_CNTCR_EN ((uint32_t)1U << 0U)
+#define RCAR_CNTCR_FCREQ(x) ((uint32_t)(x) << 8U)
+
#if PMIC_ROHM_BD9571
#define BIT_BKUP_CTRL_OUT ((uint8_t)(1U << 4))
#define PMIC_BKUP_MODE_CNT (0x20U)
@@ -323,6 +332,39 @@
rcar_lock_release();
}
+static uint64_t rcar_pwrc_saved_cntpct_el0;
+static uint32_t rcar_pwrc_saved_cntfid;
+
+#if RCAR_SYSTEM_SUSPEND
+static void rcar_pwrc_save_timer_state(void)
+{
+ rcar_pwrc_saved_cntpct_el0 = read_cntpct_el0();
+
+ rcar_pwrc_saved_cntfid =
+ mmio_read_32((uintptr_t)(RCAR_CNTC_BASE + RCAR_CNTFID_OFF));
+}
+#endif
+
+void rcar_pwrc_restore_timer_state(void)
+{
+ /* Stop timer before restoring counter value */
+ mmio_write_32((uintptr_t)(RCAR_CNTC_BASE + RCAR_CNTCR_OFF), 0U);
+
+ mmio_write_32((uintptr_t)(RCAR_CNTC_BASE + RCAR_CNTCVL_OFF),
+ (uint32_t)(rcar_pwrc_saved_cntpct_el0 & 0xFFFFFFFFU));
+ mmio_write_32((uintptr_t)(RCAR_CNTC_BASE + RCAR_CNTCVU_OFF),
+ (uint32_t)(rcar_pwrc_saved_cntpct_el0 >> 32U));
+
+ mmio_write_32((uintptr_t)(RCAR_CNTC_BASE + RCAR_CNTFID_OFF),
+ rcar_pwrc_saved_cntfid);
+
+ /* Start generic timer back */
+ write_cntfrq_el0((u_register_t)plat_get_syscnt_freq2());
+
+ mmio_write_32((uintptr_t)(RCAR_CNTC_BASE + RCAR_CNTCR_OFF),
+ (RCAR_CNTCR_FCREQ(0U) | RCAR_CNTCR_EN));
+}
+
#if !PMIC_ROHM_BD9571
void rcar_pwrc_system_reset(void)
{
@@ -640,7 +682,7 @@
DEVICE_SRAM_STACK_SIZE);
uint32_t sctlr;
- rcar_pwrc_save_generic_timer(rcar_stack_generic_timer);
+ rcar_pwrc_save_timer_state();
/* disable MMU */
sctlr = (uint32_t) read_sctlr_el3();
diff --git a/drivers/renesas/rcar/pwrc/pwrc.h b/drivers/renesas/rcar/pwrc/pwrc.h
index d4d6fc4..cfb35ff 100644
--- a/drivers/renesas/rcar/pwrc/pwrc.h
+++ b/drivers/renesas/rcar/pwrc/pwrc.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ * Copyright (c) 2015-2019, Renesas Electronics Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -52,6 +52,7 @@
uint32_t rcar_pwrc_get_cluster(void);
uint32_t rcar_pwrc_get_mpidr_cluster(uint64_t mpidr);
uint32_t rcar_pwrc_get_cpu_num(uint32_t cluster_type);
+void rcar_pwrc_restore_timer_state(void);
void plat_secondary_reset(void);
void rcar_pwrc_code_copy_to_system_ram(void);
@@ -67,12 +68,8 @@
void rcar_pwrc_suspend_to_ram(void);
#endif
-extern void rcar_pwrc_save_generic_timer(uint64_t *rcar_stack_generic_timer);
extern uint32_t rcar_pwrc_switch_stack(uintptr_t jump, uintptr_t stack,
void *arg);
-
-extern uint64_t rcar_stack_generic_timer[5];
-
#endif
#endif /* PWRC_H */
diff --git a/plat/renesas/rcar/plat_pm.c b/plat/renesas/rcar/plat_pm.c
index f41c172..e678da5 100644
--- a/plat/renesas/rcar/plat_pm.c
+++ b/plat/renesas/rcar/plat_pm.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015-2017, Renesas Electronics Corporation. All rights reserved.
+ * Copyright (c) 2015-2019, Renesas Electronics Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -35,8 +35,6 @@
#define CLUSTER_PWR_STATE(s) ((s)->pwr_domain_state[MPIDR_AFFLVL1])
#define CORE_PWR_STATE(s) ((s)->pwr_domain_state[MPIDR_AFFLVL0])
-uint64_t rcar_stack_generic_timer[5] __attribute__ ((section("data")));
-
extern void rcar_pwrc_restore_generic_timer(uint64_t *stack);
extern void plat_rcar_gic_driver_init(void);
extern void plat_rcar_gic_init(void);
@@ -150,11 +148,7 @@
if (cluster_type == RCAR_CLUSTER_A53A57)
plat_cci_init();
- rcar_pwrc_restore_generic_timer(rcar_stack_generic_timer);
-
- /* start generic timer */
- write_cntfrq_el0(plat_get_syscnt_freq2());
- mmio_write_32(RCAR_CNTC_BASE + CNTCR_OFF, CNTCR_FCREQ(U(0)) | CNTCR_EN);
+ rcar_pwrc_restore_timer_state();
rcar_pwrc_setup();
rcar_pwrc_code_copy_to_system_ram();