58 строки
1.5 KiB
C
58 строки
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2018, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/spinlock.h>
|
|
#include <asm/barrier.h>
|
|
#include <asm/sysreg.h>
|
|
#include <soc/qcom/kryo-l2-accessors.h>
|
|
|
|
#define L2CPUSRSELR_EL1 sys_reg(3, 3, 15, 0, 6)
|
|
#define L2CPUSRDR_EL1 sys_reg(3, 3, 15, 0, 7)
|
|
|
|
static DEFINE_RAW_SPINLOCK(l2_access_lock);
|
|
|
|
/**
|
|
* kryo_l2_set_indirect_reg() - write value to an L2 register
|
|
* @reg: Address of L2 register.
|
|
* @val: Value to be written to register.
|
|
*
|
|
* Use architecturally required barriers for ordering between system register
|
|
* accesses, and system registers with respect to device memory
|
|
*/
|
|
void kryo_l2_set_indirect_reg(u64 reg, u64 val)
|
|
{
|
|
unsigned long flags;
|
|
|
|
raw_spin_lock_irqsave(&l2_access_lock, flags);
|
|
write_sysreg_s(reg, L2CPUSRSELR_EL1);
|
|
isb();
|
|
write_sysreg_s(val, L2CPUSRDR_EL1);
|
|
isb();
|
|
raw_spin_unlock_irqrestore(&l2_access_lock, flags);
|
|
}
|
|
EXPORT_SYMBOL(kryo_l2_set_indirect_reg);
|
|
|
|
/**
|
|
* kryo_l2_get_indirect_reg() - read an L2 register value
|
|
* @reg: Address of L2 register.
|
|
*
|
|
* Use architecturally required barriers for ordering between system register
|
|
* accesses, and system registers with respect to device memory
|
|
*/
|
|
u64 kryo_l2_get_indirect_reg(u64 reg)
|
|
{
|
|
u64 val;
|
|
unsigned long flags;
|
|
|
|
raw_spin_lock_irqsave(&l2_access_lock, flags);
|
|
write_sysreg_s(reg, L2CPUSRSELR_EL1);
|
|
isb();
|
|
val = read_sysreg_s(L2CPUSRDR_EL1);
|
|
raw_spin_unlock_irqrestore(&l2_access_lock, flags);
|
|
|
|
return val;
|
|
}
|
|
EXPORT_SYMBOL(kryo_l2_get_indirect_reg);
|