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| author | Marc Zyngier <marc.zyngier@arm.com> | 2017-01-03 14:39:52 +0100 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2017-08-31 16:31:36 +0200 |
| commit | 3ca63f363f3f8fe457482c53d5c86d83bff21e64 (patch) | |
| tree | 11268a0c171495eb884359b86e95b532123a575d /arch/arm/include | |
| parent | irqchip/gic-v3-its: Add VPE irq domain [de]activation (diff) | |
| download | linux-3ca63f363f3f8fe457482c53d5c86d83bff21e64.tar.xz linux-3ca63f363f3f8fe457482c53d5c86d83bff21e64.zip | |
irqchip/gic-v3-its: Add VPENDBASER/VPROPBASER accessors
V{PEND,PROP}BASER being 64bit registers, they need some ad-hoc
accessors on 32bit, specially given that VPENDBASER contains
a Valid bit, making the access a bit convoluted.
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/arch_gicv3.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch_gicv3.h b/arch/arm/include/asm/arch_gicv3.h index 27475904e096..8d45e88feac9 100644 --- a/arch/arm/include/asm/arch_gicv3.h +++ b/arch/arm/include/asm/arch_gicv3.h @@ -291,5 +291,33 @@ static inline u64 __gic_readq_nonatomic(const volatile void __iomem *addr) */ #define gits_write_cwriter(v, c) __gic_writeq_nonatomic(v, c) +/* + * GITS_VPROPBASER - hi and lo bits may be accessed independently. + */ +#define gits_write_vpropbaser(v, c) __gic_writeq_nonatomic(v, c) + +/* + * GITS_VPENDBASER - the Valid bit must be cleared before changing + * anything else. + */ +static inline void gits_write_vpendbaser(u64 val, void * __iomem addr) +{ + u32 tmp; + + tmp = readl_relaxed(addr + 4); + if (tmp & (GICR_VPENDBASER_Valid >> 32)) { + tmp &= ~(GICR_VPENDBASER_Valid >> 32); + writel_relaxed(tmp, addr + 4); + } + + /* + * Use the fact that __gic_writeq_nonatomic writes the second + * half of the 64bit quantity after the first. + */ + __gic_writeq_nonatomic(val, addr); +} + +#define gits_read_vpendbaser(c) __gic_readq_nonatomic(c) + #endif /* !__ASSEMBLY__ */ #endif /* !__ASM_ARCH_GICV3_H */ |