forked from Minki/linux
8e31ed9c18
Both the 32bit and 64bit versions of the GICv3 header file are using barriers, but neglect to include barrier.h, leading to an interesting splat in some circumstances. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1449483072-17694-3-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
172 lines
4.6 KiB
C
172 lines
4.6 KiB
C
/*
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* arch/arm64/include/asm/arch_gicv3.h
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*
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* Copyright (C) 2015 ARM Ltd.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_ARCH_GICV3_H
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#define __ASM_ARCH_GICV3_H
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#include <asm/sysreg.h>
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#define ICC_EOIR1_EL1 sys_reg(3, 0, 12, 12, 1)
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#define ICC_DIR_EL1 sys_reg(3, 0, 12, 11, 1)
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#define ICC_IAR1_EL1 sys_reg(3, 0, 12, 12, 0)
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#define ICC_SGI1R_EL1 sys_reg(3, 0, 12, 11, 5)
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#define ICC_PMR_EL1 sys_reg(3, 0, 4, 6, 0)
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#define ICC_CTLR_EL1 sys_reg(3, 0, 12, 12, 4)
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#define ICC_SRE_EL1 sys_reg(3, 0, 12, 12, 5)
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#define ICC_GRPEN1_EL1 sys_reg(3, 0, 12, 12, 7)
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#define ICC_SRE_EL2 sys_reg(3, 4, 12, 9, 5)
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/*
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* System register definitions
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*/
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#define ICH_VSEIR_EL2 sys_reg(3, 4, 12, 9, 4)
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#define ICH_HCR_EL2 sys_reg(3, 4, 12, 11, 0)
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#define ICH_VTR_EL2 sys_reg(3, 4, 12, 11, 1)
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#define ICH_MISR_EL2 sys_reg(3, 4, 12, 11, 2)
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#define ICH_EISR_EL2 sys_reg(3, 4, 12, 11, 3)
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#define ICH_ELSR_EL2 sys_reg(3, 4, 12, 11, 5)
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#define ICH_VMCR_EL2 sys_reg(3, 4, 12, 11, 7)
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#define __LR0_EL2(x) sys_reg(3, 4, 12, 12, x)
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#define __LR8_EL2(x) sys_reg(3, 4, 12, 13, x)
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#define ICH_LR0_EL2 __LR0_EL2(0)
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#define ICH_LR1_EL2 __LR0_EL2(1)
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#define ICH_LR2_EL2 __LR0_EL2(2)
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#define ICH_LR3_EL2 __LR0_EL2(3)
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#define ICH_LR4_EL2 __LR0_EL2(4)
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#define ICH_LR5_EL2 __LR0_EL2(5)
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#define ICH_LR6_EL2 __LR0_EL2(6)
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#define ICH_LR7_EL2 __LR0_EL2(7)
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#define ICH_LR8_EL2 __LR8_EL2(0)
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#define ICH_LR9_EL2 __LR8_EL2(1)
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#define ICH_LR10_EL2 __LR8_EL2(2)
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#define ICH_LR11_EL2 __LR8_EL2(3)
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#define ICH_LR12_EL2 __LR8_EL2(4)
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#define ICH_LR13_EL2 __LR8_EL2(5)
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#define ICH_LR14_EL2 __LR8_EL2(6)
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#define ICH_LR15_EL2 __LR8_EL2(7)
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#define __AP0Rx_EL2(x) sys_reg(3, 4, 12, 8, x)
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#define ICH_AP0R0_EL2 __AP0Rx_EL2(0)
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#define ICH_AP0R1_EL2 __AP0Rx_EL2(1)
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#define ICH_AP0R2_EL2 __AP0Rx_EL2(2)
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#define ICH_AP0R3_EL2 __AP0Rx_EL2(3)
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#define __AP1Rx_EL2(x) sys_reg(3, 4, 12, 9, x)
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#define ICH_AP1R0_EL2 __AP1Rx_EL2(0)
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#define ICH_AP1R1_EL2 __AP1Rx_EL2(1)
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#define ICH_AP1R2_EL2 __AP1Rx_EL2(2)
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#define ICH_AP1R3_EL2 __AP1Rx_EL2(3)
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#ifndef __ASSEMBLY__
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#include <linux/stringify.h>
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#include <asm/barrier.h>
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/*
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* Low-level accessors
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*
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* These system registers are 32 bits, but we make sure that the compiler
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* sets the GP register's most significant bits to 0 with an explicit cast.
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*/
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static inline void gic_write_eoir(u32 irq)
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{
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asm volatile("msr_s " __stringify(ICC_EOIR1_EL1) ", %0" : : "r" ((u64)irq));
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isb();
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}
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static inline void gic_write_dir(u32 irq)
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{
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asm volatile("msr_s " __stringify(ICC_DIR_EL1) ", %0" : : "r" ((u64)irq));
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isb();
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}
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static inline u64 gic_read_iar_common(void)
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{
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u64 irqstat;
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asm volatile("mrs_s %0, " __stringify(ICC_IAR1_EL1) : "=r" (irqstat));
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return irqstat;
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}
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/*
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* Cavium ThunderX erratum 23154
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*
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* The gicv3 of ThunderX requires a modified version for reading the
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* IAR status to ensure data synchronization (access to icc_iar1_el1
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* is not sync'ed before and after).
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*/
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static inline u64 gic_read_iar_cavium_thunderx(void)
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{
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u64 irqstat;
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asm volatile(
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"nop;nop;nop;nop\n\t"
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"nop;nop;nop;nop\n\t"
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"mrs_s %0, " __stringify(ICC_IAR1_EL1) "\n\t"
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"nop;nop;nop;nop"
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: "=r" (irqstat));
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mb();
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return irqstat;
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}
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static inline void gic_write_pmr(u32 val)
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{
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asm volatile("msr_s " __stringify(ICC_PMR_EL1) ", %0" : : "r" ((u64)val));
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}
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static inline void gic_write_ctlr(u32 val)
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{
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asm volatile("msr_s " __stringify(ICC_CTLR_EL1) ", %0" : : "r" ((u64)val));
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isb();
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}
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static inline void gic_write_grpen1(u32 val)
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{
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asm volatile("msr_s " __stringify(ICC_GRPEN1_EL1) ", %0" : : "r" ((u64)val));
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isb();
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}
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static inline void gic_write_sgi1r(u64 val)
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{
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asm volatile("msr_s " __stringify(ICC_SGI1R_EL1) ", %0" : : "r" (val));
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}
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static inline u32 gic_read_sre(void)
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{
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u64 val;
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asm volatile("mrs_s %0, " __stringify(ICC_SRE_EL1) : "=r" (val));
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return val;
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}
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static inline void gic_write_sre(u32 val)
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{
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asm volatile("msr_s " __stringify(ICC_SRE_EL1) ", %0" : : "r" ((u64)val));
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isb();
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}
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#define gic_read_typer(c) readq_relaxed(c)
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#define gic_write_irouter(v, c) writeq_relaxed(v, c)
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_ARCH_GICV3_H */
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