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Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/include/asm/arch_gicv3.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/arch_gicv3.h b/arch/arm64/include/asm/arch_gicv3.h new file mode 100644 index 000000000..e278f94df --- /dev/null +++ b/arch/arm64/include/asm/arch_gicv3.h @@ -0,0 +1,144 @@ +/* + * arch/arm64/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 + +#include <asm/sysreg.h> + +#ifndef __ASSEMBLY__ + +#include <linux/stringify.h> +#include <asm/barrier.h> +#include <asm/cacheflush.h> + +#define read_gicreg(r) read_sysreg_s(SYS_ ## r) +#define write_gicreg(v, r) write_sysreg_s(v, SYS_ ## r) + +/* + * Low-level accessors + * + * These system registers are 32 bits, but we make sure that the compiler + * sets the GP register's most significant bits to 0 with an explicit cast. + */ + +static inline void gic_write_eoir(u32 irq) +{ + write_sysreg_s(irq, SYS_ICC_EOIR1_EL1); + isb(); +} + +static inline void gic_write_dir(u32 irq) +{ + write_sysreg_s(irq, SYS_ICC_DIR_EL1); + isb(); +} + +static inline u64 gic_read_iar_common(void) +{ + u64 irqstat; + + irqstat = read_sysreg_s(SYS_ICC_IAR1_EL1); + dsb(sy); + return irqstat; +} + +/* + * Cavium ThunderX erratum 23154 + * + * The gicv3 of ThunderX requires a modified version for reading the + * IAR status to ensure data synchronization (access to icc_iar1_el1 + * is not sync'ed before and after). + */ +static inline u64 gic_read_iar_cavium_thunderx(void) +{ + u64 irqstat; + + nops(8); + irqstat = read_sysreg_s(SYS_ICC_IAR1_EL1); + nops(4); + mb(); + + return irqstat; +} + +static inline void gic_write_ctlr(u32 val) +{ + write_sysreg_s(val, SYS_ICC_CTLR_EL1); + isb(); +} + +static inline u32 gic_read_ctlr(void) +{ + return read_sysreg_s(SYS_ICC_CTLR_EL1); +} + +static inline void gic_write_grpen1(u32 val) +{ + write_sysreg_s(val, SYS_ICC_IGRPEN1_EL1); + isb(); +} + +static inline void gic_write_sgi1r(u64 val) +{ + write_sysreg_s(val, SYS_ICC_SGI1R_EL1); +} + +static inline u32 gic_read_sre(void) +{ + return read_sysreg_s(SYS_ICC_SRE_EL1); +} + +static inline void gic_write_sre(u32 val) +{ + write_sysreg_s(val, SYS_ICC_SRE_EL1); + isb(); +} + +static inline void gic_write_bpr1(u32 val) +{ + write_sysreg_s(val, SYS_ICC_BPR1_EL1); +} + +#define gic_read_typer(c) readq_relaxed(c) +#define gic_write_irouter(v, c) writeq_relaxed(v, c) +#define gic_read_lpir(c) readq_relaxed(c) +#define gic_write_lpir(v, c) writeq_relaxed(v, c) + +#define gic_flush_dcache_to_poc(a,l) __flush_dcache_area((a), (l)) + +#define gits_read_baser(c) readq_relaxed(c) +#define gits_write_baser(v, c) writeq_relaxed(v, c) + +#define gits_read_cbaser(c) readq_relaxed(c) +#define gits_write_cbaser(v, c) writeq_relaxed(v, c) + +#define gits_write_cwriter(v, c) writeq_relaxed(v, c) + +#define gicr_read_propbaser(c) readq_relaxed(c) +#define gicr_write_propbaser(v, c) writeq_relaxed(v, c) + +#define gicr_write_pendbaser(v, c) writeq_relaxed(v, c) +#define gicr_read_pendbaser(c) readq_relaxed(c) + +#define gits_write_vpropbaser(v, c) writeq_relaxed(v, c) + +#define gits_write_vpendbaser(v, c) writeq_relaxed(v, c) +#define gits_read_vpendbaser(c) readq_relaxed(c) + +#endif /* __ASSEMBLY__ */ +#endif /* __ASM_ARCH_GICV3_H */ |