diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2016-02-03 03:15:28 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-05-13 14:01:49 +0200 |
| commit | 835d2b452969820fd67a755a2c01fb6e12822448 (patch) | |
| tree | d4b3caf048b0a3cf288c20935ba28dda2c7f850a /include | |
| parent | d46812bb0bef04efa4e6cba677ba54c2e4f1ae59 (diff) | |
| download | linux-835d2b452969820fd67a755a2c01fb6e12822448.tar.bz2 | |
irqchip: mips-gic: Provide VP ID accessor
Provide a gic_read_local_vp_id() function to read the VCNUM field of the
GICs local VP_IDENT register. This will be used by a further patch to
check that the value reported by the GIC matches up with the kernels
calculation.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12334/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/irqchip/mips-gic.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/irqchip/mips-gic.h b/include/linux/irqchip/mips-gic.h index 80f89e4a29ac..81f930b0bca9 100644 --- a/include/linux/irqchip/mips-gic.h +++ b/include/linux/irqchip/mips-gic.h @@ -103,6 +103,7 @@ #define GIC_VPE_SWINT0_MAP_OFS 0x0054 #define GIC_VPE_SWINT1_MAP_OFS 0x0058 #define GIC_VPE_OTHER_ADDR_OFS 0x0080 +#define GIC_VP_IDENT_OFS 0x0088 #define GIC_VPE_WD_CONFIG0_OFS 0x0090 #define GIC_VPE_WD_COUNT0_OFS 0x0094 #define GIC_VPE_WD_INITIAL0_OFS 0x0098 @@ -211,6 +212,10 @@ #define GIC_VPE_SMASK_FDC_SHF 6 #define GIC_VPE_SMASK_FDC_MSK (MSK(1) << GIC_VPE_SMASK_FDC_SHF) +/* GIC_VP_IDENT fields */ +#define GIC_VP_IDENT_VCNUM_SHF 0 +#define GIC_VP_IDENT_VCNUM_MSK (MSK(6) << GIC_VP_IDENT_VCNUM_SHF) + /* GIC nomenclature for Core Interrupt Pins. */ #define GIC_CPU_INT0 0 /* Core Interrupt 2 */ #define GIC_CPU_INT1 1 /* . */ @@ -278,4 +283,16 @@ static inline int gic_get_usm_range(struct resource *gic_usm_res) #endif /* CONFIG_MIPS_GIC */ +/** + * gic_read_local_vp_id() - read the local VPs VCNUM + * + * Read the VCNUM of the local VP from the GIC_VP_IDENT register and + * return it to the caller. This ID should be used to refer to the VP + * via the GICs VP-other region, or when calculating an offset to a + * bit representing the VP in interrupt masks. + * + * Return: The VCNUM value for the local VP. + */ +extern unsigned gic_read_local_vp_id(void); + #endif /* __LINUX_IRQCHIP_MIPS_GIC_H */ |