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// 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.
* @value: 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);
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