arch/arm/include/asm/arch_gicv3.h - kernel/msm-4.9 - Gitiles

 /*
  * arch/arm/include/asm/arch_gicv3.h
  *
  * Copyright (C) 2015 ARM Ltd.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #ifndef __ASM_ARCH_GICV3_H
 #define __ASM_ARCH_GICV3_H

 #ifndef __ASSEMBLY__

 #include <linux/io.h>
 #include <asm/barrier.h>
 #include <asm/cp15.h>

 #define ICC_EOIR1			__ACCESS_CP15(c12, 0, c12, 1)
 #define ICC_DIR				__ACCESS_CP15(c12, 0, c11, 1)
 #define ICC_IAR1			__ACCESS_CP15(c12, 0, c12, 0)
 #define ICC_SGI1R			__ACCESS_CP15_64(0, c12)
 #define ICC_PMR				__ACCESS_CP15(c4, 0, c6, 0)
 #define ICC_CTLR			__ACCESS_CP15(c12, 0, c12, 4)
 #define ICC_SRE				__ACCESS_CP15(c12, 0, c12, 5)
 #define ICC_IGRPEN1			__ACCESS_CP15(c12, 0, c12, 7)
 #define ICC_BPR1			__ACCESS_CP15(c12, 0, c12, 3)

 #define ICC_HSRE			__ACCESS_CP15(c12, 4, c9, 5)

 #define ICH_VSEIR			__ACCESS_CP15(c12, 4, c9, 4)
 #define ICH_HCR				__ACCESS_CP15(c12, 4, c11, 0)
 #define ICH_VTR				__ACCESS_CP15(c12, 4, c11, 1)
 #define ICH_MISR			__ACCESS_CP15(c12, 4, c11, 2)
 #define ICH_EISR			__ACCESS_CP15(c12, 4, c11, 3)
 #define ICH_ELSR			__ACCESS_CP15(c12, 4, c11, 5)
 #define ICH_VMCR			__ACCESS_CP15(c12, 4, c11, 7)

 #define __LR0(x)			__ACCESS_CP15(c12, 4, c12, x)
 #define __LR8(x)			__ACCESS_CP15(c12, 4, c13, x)

 #define ICH_LR0				__LR0(0)
 #define ICH_LR1				__LR0(1)
 #define ICH_LR2				__LR0(2)
 #define ICH_LR3				__LR0(3)
 #define ICH_LR4				__LR0(4)
 #define ICH_LR5				__LR0(5)
 #define ICH_LR6				__LR0(6)
 #define ICH_LR7				__LR0(7)
 #define ICH_LR8				__LR8(0)
 #define ICH_LR9				__LR8(1)
 #define ICH_LR10			__LR8(2)
 #define ICH_LR11			__LR8(3)
 #define ICH_LR12			__LR8(4)
 #define ICH_LR13			__LR8(5)
 #define ICH_LR14			__LR8(6)
 #define ICH_LR15			__LR8(7)

 /* LR top half */
 #define __LRC0(x)			__ACCESS_CP15(c12, 4, c14, x)
 #define __LRC8(x)			__ACCESS_CP15(c12, 4, c15, x)

 #define ICH_LRC0			__LRC0(0)
 #define ICH_LRC1			__LRC0(1)
 #define ICH_LRC2			__LRC0(2)
 #define ICH_LRC3			__LRC0(3)
 #define ICH_LRC4			__LRC0(4)
 #define ICH_LRC5			__LRC0(5)
 #define ICH_LRC6			__LRC0(6)
 #define ICH_LRC7			__LRC0(7)
 #define ICH_LRC8			__LRC8(0)
 #define ICH_LRC9			__LRC8(1)
 #define ICH_LRC10			__LRC8(2)
 #define ICH_LRC11			__LRC8(3)
 #define ICH_LRC12			__LRC8(4)
 #define ICH_LRC13			__LRC8(5)
 #define ICH_LRC14			__LRC8(6)
 #define ICH_LRC15			__LRC8(7)

 #define __AP0Rx(x)			__ACCESS_CP15(c12, 4, c8, x)
 #define ICH_AP0R0			__AP0Rx(0)
 #define ICH_AP0R1			__AP0Rx(1)
 #define ICH_AP0R2			__AP0Rx(2)
 #define ICH_AP0R3			__AP0Rx(3)

 #define __AP1Rx(x)			__ACCESS_CP15(c12, 4, c9, x)
 #define ICH_AP1R0			__AP1Rx(0)
 #define ICH_AP1R1			__AP1Rx(1)
 #define ICH_AP1R2			__AP1Rx(2)
 #define ICH_AP1R3			__AP1Rx(3)

 /* A32-to-A64 mappings used by VGIC save/restore */

 #define CPUIF_MAP(a32, a64)			\
 static inline void write_ ## a64(u32 val)	\
 {						\
 	write_sysreg(val, a32);			\
 }						\
 static inline u32 read_ ## a64(void)		\
 {						\
 	return read_sysreg(a32); 		\
 }						\

 #define CPUIF_MAP_LO_HI(a32lo, a32hi, a64)	\
 static inline void write_ ## a64(u64 val)	\
 {						\
 	write_sysreg(lower_32_bits(val), a32lo);\
 	write_sysreg(upper_32_bits(val), a32hi);\
 }						\
 static inline u64 read_ ## a64(void)		\
 {						\
 	u64 val = read_sysreg(a32lo);		\
 						\
 	val |=	(u64)read_sysreg(a32hi) << 32;	\
 						\
 	return val; 				\
 }

 CPUIF_MAP(ICH_HCR, ICH_HCR_EL2)
 CPUIF_MAP(ICH_VTR, ICH_VTR_EL2)
 CPUIF_MAP(ICH_MISR, ICH_MISR_EL2)
 CPUIF_MAP(ICH_EISR, ICH_EISR_EL2)
 CPUIF_MAP(ICH_ELSR, ICH_ELSR_EL2)
 CPUIF_MAP(ICH_VMCR, ICH_VMCR_EL2)
 CPUIF_MAP(ICH_AP0R3, ICH_AP0R3_EL2)
 CPUIF_MAP(ICH_AP0R2, ICH_AP0R2_EL2)
 CPUIF_MAP(ICH_AP0R1, ICH_AP0R1_EL2)
 CPUIF_MAP(ICH_AP0R0, ICH_AP0R0_EL2)
 CPUIF_MAP(ICH_AP1R3, ICH_AP1R3_EL2)
 CPUIF_MAP(ICH_AP1R2, ICH_AP1R2_EL2)
 CPUIF_MAP(ICH_AP1R1, ICH_AP1R1_EL2)
 CPUIF_MAP(ICH_AP1R0, ICH_AP1R0_EL2)
 CPUIF_MAP(ICC_HSRE, ICC_SRE_EL2)
 CPUIF_MAP(ICC_SRE, ICC_SRE_EL1)

 CPUIF_MAP_LO_HI(ICH_LR15, ICH_LRC15, ICH_LR15_EL2)
 CPUIF_MAP_LO_HI(ICH_LR14, ICH_LRC14, ICH_LR14_EL2)
 CPUIF_MAP_LO_HI(ICH_LR13, ICH_LRC13, ICH_LR13_EL2)
 CPUIF_MAP_LO_HI(ICH_LR12, ICH_LRC12, ICH_LR12_EL2)
 CPUIF_MAP_LO_HI(ICH_LR11, ICH_LRC11, ICH_LR11_EL2)
 CPUIF_MAP_LO_HI(ICH_LR10, ICH_LRC10, ICH_LR10_EL2)
 CPUIF_MAP_LO_HI(ICH_LR9, ICH_LRC9, ICH_LR9_EL2)
 CPUIF_MAP_LO_HI(ICH_LR8, ICH_LRC8, ICH_LR8_EL2)
 CPUIF_MAP_LO_HI(ICH_LR7, ICH_LRC7, ICH_LR7_EL2)
 CPUIF_MAP_LO_HI(ICH_LR6, ICH_LRC6, ICH_LR6_EL2)
 CPUIF_MAP_LO_HI(ICH_LR5, ICH_LRC5, ICH_LR5_EL2)
 CPUIF_MAP_LO_HI(ICH_LR4, ICH_LRC4, ICH_LR4_EL2)
 CPUIF_MAP_LO_HI(ICH_LR3, ICH_LRC3, ICH_LR3_EL2)
 CPUIF_MAP_LO_HI(ICH_LR2, ICH_LRC2, ICH_LR2_EL2)
 CPUIF_MAP_LO_HI(ICH_LR1, ICH_LRC1, ICH_LR1_EL2)
 CPUIF_MAP_LO_HI(ICH_LR0, ICH_LRC0, ICH_LR0_EL2)

 #define read_gicreg(r)                 read_##r()
 #define write_gicreg(v, r)             write_##r(v)

 /* Low-level accessors */

 static inline void gic_write_eoir(u32 irq)
 {
 	write_sysreg(irq, ICC_EOIR1);
 	isb();
 }

 static inline void gic_write_dir(u32 val)
 {
 	write_sysreg(val, ICC_DIR);
 	isb();
 }

 static inline u32 gic_read_iar(void)
 {
 	u32 irqstat = read_sysreg(ICC_IAR1);

 	dsb(sy);

 	return irqstat;
 }

 static inline void gic_write_pmr(u32 val)
 {
 	write_sysreg(val, ICC_PMR);
 }

 static inline void gic_write_ctlr(u32 val)
 {
 	write_sysreg(val, ICC_CTLR);
 	isb();
 }

 static inline void gic_write_grpen1(u32 val)
 {
 	write_sysreg(val, ICC_IGRPEN1);
 	isb();
 }

 static inline void gic_write_sgi1r(u64 val)
 {
 	write_sysreg(val, ICC_SGI1R);
 }

 static inline u32 gic_read_sre(void)
 {
 	return read_sysreg(ICC_SRE);
 }

 static inline void gic_write_sre(u32 val)
 {
 	write_sysreg(val, ICC_SRE);
 	isb();
 }

 static inline void gic_write_bpr1(u32 val)
 {
 	write_sysreg(val, ICC_BPR1);
 }

 /*
  * Even in 32bit systems that use LPAE, there is no guarantee that the I/O
  * interface provides true 64bit atomic accesses, so using strd/ldrd doesn't
  * make much sense.
  * Moreover, 64bit I/O emulation is extremely difficult to implement on
  * AArch32, since the syndrome register doesn't provide any information for
  * them.
  * Consequently, the following IO helpers use 32bit accesses.
  *
  * There are only two registers that need 64bit accesses in this driver:
  * - GICD_IROUTERn, contain the affinity values associated to each interrupt.
  *   The upper-word (aff3) will always be 0, so there is no need for a lock.
  * - GICR_TYPER is an ID register and doesn't need atomicity.
  */
 static inline void gic_write_irouter(u64 val, volatile void __iomem *addr)
 {
 	writel_relaxed((u32)val, addr);
 	writel_relaxed((u32)(val >> 32), addr + 4);
 }

 static inline u64 gic_read_typer(const volatile void __iomem *addr)
 {
 	u64 val;

 	val = readl_relaxed(addr);
 	val |= (u64)readl_relaxed(addr + 4) << 32;
 	return val;
 }

 #endif /* !__ASSEMBLY__ */
 #endif /* !__ASM_ARCH_GICV3_H */
	/*
	* arch/arm/include/asm/arch_gicv3.h
	*
	* Copyright (C) 2015 ARM Ltd.
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/
	#ifndef __ASM_ARCH_GICV3_H
	#define __ASM_ARCH_GICV3_H

	#ifndef __ASSEMBLY__

	#include <linux/io.h>
	#include <asm/barrier.h>
	#include <asm/cp15.h>

	#define ICC_EOIR1 __ACCESS_CP15(c12, 0, c12, 1)
	#define ICC_DIR __ACCESS_CP15(c12, 0, c11, 1)
	#define ICC_IAR1 __ACCESS_CP15(c12, 0, c12, 0)
	#define ICC_SGI1R __ACCESS_CP15_64(0, c12)
	#define ICC_PMR __ACCESS_CP15(c4, 0, c6, 0)
	#define ICC_CTLR __ACCESS_CP15(c12, 0, c12, 4)
	#define ICC_SRE __ACCESS_CP15(c12, 0, c12, 5)
	#define ICC_IGRPEN1 __ACCESS_CP15(c12, 0, c12, 7)
	#define ICC_BPR1 __ACCESS_CP15(c12, 0, c12, 3)

	#define ICC_HSRE __ACCESS_CP15(c12, 4, c9, 5)

	#define ICH_VSEIR __ACCESS_CP15(c12, 4, c9, 4)
	#define ICH_HCR __ACCESS_CP15(c12, 4, c11, 0)
	#define ICH_VTR __ACCESS_CP15(c12, 4, c11, 1)
	#define ICH_MISR __ACCESS_CP15(c12, 4, c11, 2)
	#define ICH_EISR __ACCESS_CP15(c12, 4, c11, 3)
	#define ICH_ELSR __ACCESS_CP15(c12, 4, c11, 5)
	#define ICH_VMCR __ACCESS_CP15(c12, 4, c11, 7)

	#define __LR0(x) __ACCESS_CP15(c12, 4, c12, x)
	#define __LR8(x) __ACCESS_CP15(c12, 4, c13, x)

	#define ICH_LR0 __LR0(0)
	#define ICH_LR1 __LR0(1)
	#define ICH_LR2 __LR0(2)
	#define ICH_LR3 __LR0(3)
	#define ICH_LR4 __LR0(4)
	#define ICH_LR5 __LR0(5)
	#define ICH_LR6 __LR0(6)
	#define ICH_LR7 __LR0(7)
	#define ICH_LR8 __LR8(0)
	#define ICH_LR9 __LR8(1)
	#define ICH_LR10 __LR8(2)
	#define ICH_LR11 __LR8(3)
	#define ICH_LR12 __LR8(4)
	#define ICH_LR13 __LR8(5)
	#define ICH_LR14 __LR8(6)
	#define ICH_LR15 __LR8(7)

	/* LR top half */
	#define __LRC0(x) __ACCESS_CP15(c12, 4, c14, x)
	#define __LRC8(x) __ACCESS_CP15(c12, 4, c15, x)

	#define ICH_LRC0 __LRC0(0)
	#define ICH_LRC1 __LRC0(1)
	#define ICH_LRC2 __LRC0(2)
	#define ICH_LRC3 __LRC0(3)
	#define ICH_LRC4 __LRC0(4)
	#define ICH_LRC5 __LRC0(5)
	#define ICH_LRC6 __LRC0(6)
	#define ICH_LRC7 __LRC0(7)
	#define ICH_LRC8 __LRC8(0)
	#define ICH_LRC9 __LRC8(1)
	#define ICH_LRC10 __LRC8(2)
	#define ICH_LRC11 __LRC8(3)
	#define ICH_LRC12 __LRC8(4)
	#define ICH_LRC13 __LRC8(5)
	#define ICH_LRC14 __LRC8(6)
	#define ICH_LRC15 __LRC8(7)

	#define __AP0Rx(x) __ACCESS_CP15(c12, 4, c8, x)
	#define ICH_AP0R0 __AP0Rx(0)
	#define ICH_AP0R1 __AP0Rx(1)
	#define ICH_AP0R2 __AP0Rx(2)
	#define ICH_AP0R3 __AP0Rx(3)

	#define __AP1Rx(x) __ACCESS_CP15(c12, 4, c9, x)
	#define ICH_AP1R0 __AP1Rx(0)
	#define ICH_AP1R1 __AP1Rx(1)
	#define ICH_AP1R2 __AP1Rx(2)
	#define ICH_AP1R3 __AP1Rx(3)

	/* A32-to-A64 mappings used by VGIC save/restore */

	#define CPUIF_MAP(a32, a64) \
	static inline void write_ ## a64(u32 val) \
	{ \
	write_sysreg(val, a32); \
	} \
	static inline u32 read_ ## a64(void) \
	{ \
	return read_sysreg(a32); \
	} \

	#define CPUIF_MAP_LO_HI(a32lo, a32hi, a64) \
	static inline void write_ ## a64(u64 val) \
	{ \
	write_sysreg(lower_32_bits(val), a32lo);\
	write_sysreg(upper_32_bits(val), a32hi);\
	} \
	static inline u64 read_ ## a64(void) \
	{ \
	u64 val = read_sysreg(a32lo); \
	\
	val \|= (u64)read_sysreg(a32hi) << 32; \
	\
	return val; \
	}

	CPUIF_MAP(ICH_HCR, ICH_HCR_EL2)
	CPUIF_MAP(ICH_VTR, ICH_VTR_EL2)
	CPUIF_MAP(ICH_MISR, ICH_MISR_EL2)
	CPUIF_MAP(ICH_EISR, ICH_EISR_EL2)
	CPUIF_MAP(ICH_ELSR, ICH_ELSR_EL2)
	CPUIF_MAP(ICH_VMCR, ICH_VMCR_EL2)
	CPUIF_MAP(ICH_AP0R3, ICH_AP0R3_EL2)
	CPUIF_MAP(ICH_AP0R2, ICH_AP0R2_EL2)
	CPUIF_MAP(ICH_AP0R1, ICH_AP0R1_EL2)
	CPUIF_MAP(ICH_AP0R0, ICH_AP0R0_EL2)
	CPUIF_MAP(ICH_AP1R3, ICH_AP1R3_EL2)
	CPUIF_MAP(ICH_AP1R2, ICH_AP1R2_EL2)
	CPUIF_MAP(ICH_AP1R1, ICH_AP1R1_EL2)
	CPUIF_MAP(ICH_AP1R0, ICH_AP1R0_EL2)
	CPUIF_MAP(ICC_HSRE, ICC_SRE_EL2)
	CPUIF_MAP(ICC_SRE, ICC_SRE_EL1)

	CPUIF_MAP_LO_HI(ICH_LR15, ICH_LRC15, ICH_LR15_EL2)
	CPUIF_MAP_LO_HI(ICH_LR14, ICH_LRC14, ICH_LR14_EL2)
	CPUIF_MAP_LO_HI(ICH_LR13, ICH_LRC13, ICH_LR13_EL2)
	CPUIF_MAP_LO_HI(ICH_LR12, ICH_LRC12, ICH_LR12_EL2)
	CPUIF_MAP_LO_HI(ICH_LR11, ICH_LRC11, ICH_LR11_EL2)
	CPUIF_MAP_LO_HI(ICH_LR10, ICH_LRC10, ICH_LR10_EL2)
	CPUIF_MAP_LO_HI(ICH_LR9, ICH_LRC9, ICH_LR9_EL2)
	CPUIF_MAP_LO_HI(ICH_LR8, ICH_LRC8, ICH_LR8_EL2)
	CPUIF_MAP_LO_HI(ICH_LR7, ICH_LRC7, ICH_LR7_EL2)
	CPUIF_MAP_LO_HI(ICH_LR6, ICH_LRC6, ICH_LR6_EL2)
	CPUIF_MAP_LO_HI(ICH_LR5, ICH_LRC5, ICH_LR5_EL2)
	CPUIF_MAP_LO_HI(ICH_LR4, ICH_LRC4, ICH_LR4_EL2)
	CPUIF_MAP_LO_HI(ICH_LR3, ICH_LRC3, ICH_LR3_EL2)
	CPUIF_MAP_LO_HI(ICH_LR2, ICH_LRC2, ICH_LR2_EL2)
	CPUIF_MAP_LO_HI(ICH_LR1, ICH_LRC1, ICH_LR1_EL2)
	CPUIF_MAP_LO_HI(ICH_LR0, ICH_LRC0, ICH_LR0_EL2)

	#define read_gicreg(r) read_##r()
	#define write_gicreg(v, r) write_##r(v)

	/* Low-level accessors */

	static inline void gic_write_eoir(u32 irq)
	{
	write_sysreg(irq, ICC_EOIR1);
	isb();
	}

	static inline void gic_write_dir(u32 val)
	{
	write_sysreg(val, ICC_DIR);
	isb();
	}

	static inline u32 gic_read_iar(void)
	{
	u32 irqstat = read_sysreg(ICC_IAR1);

	dsb(sy);

	return irqstat;
	}

	static inline void gic_write_pmr(u32 val)
	{
	write_sysreg(val, ICC_PMR);
	}

	static inline void gic_write_ctlr(u32 val)
	{
	write_sysreg(val, ICC_CTLR);
	isb();
	}

	static inline void gic_write_grpen1(u32 val)
	{
	write_sysreg(val, ICC_IGRPEN1);
	isb();
	}

	static inline void gic_write_sgi1r(u64 val)
	{
	write_sysreg(val, ICC_SGI1R);
	}

	static inline u32 gic_read_sre(void)
	{
	return read_sysreg(ICC_SRE);
	}

	static inline void gic_write_sre(u32 val)
	{
	write_sysreg(val, ICC_SRE);
	isb();
	}

	static inline void gic_write_bpr1(u32 val)
	{
	write_sysreg(val, ICC_BPR1);
	}

	/*
	* Even in 32bit systems that use LPAE, there is no guarantee that the I/O
	* interface provides true 64bit atomic accesses, so using strd/ldrd doesn't
	* make much sense.
	* Moreover, 64bit I/O emulation is extremely difficult to implement on
	* AArch32, since the syndrome register doesn't provide any information for
	* them.
	* Consequently, the following IO helpers use 32bit accesses.
	*
	* There are only two registers that need 64bit accesses in this driver:
	* - GICD_IROUTERn, contain the affinity values associated to each interrupt.
	* The upper-word (aff3) will always be 0, so there is no need for a lock.
	* - GICR_TYPER is an ID register and doesn't need atomicity.
	*/
	static inline void gic_write_irouter(u64 val, volatile void __iomem *addr)
	{
	writel_relaxed((u32)val, addr);
	writel_relaxed((u32)(val >> 32), addr + 4);
	}

	static inline u64 gic_read_typer(const volatile void __iomem *addr)
	{
	u64 val;

	val = readl_relaxed(addr);
	val \|= (u64)readl_relaxed(addr + 4) << 32;
	return val;
	}

	#endif /* !__ASSEMBLY__ */
	#endif /* !__ASM_ARCH_GICV3_H */