[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v4 09/11] xen: arm: use symbolic names for MPIDR bits.
arm32 already uses MPIDR_HWID_MASK, use it on arm64 too. Add MPIDR_{SMP,UP} (and bitwise equivalents) and use them. Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> Acked-by: Tim Deegan <tim@xxxxxxx> --- v4: Use U not UL, otherwise MPIDR_INVALID can be a 64-bit number, but the register is 32-bit so assigning it to a u32 etc is valid. e.g tmp_map in init_cpus_map. Avoids -Werror=overflow issues. v3: Needs to be unsigned, 1<<31 is undefined on arm32 otherwise --- xen/arch/arm/arm32/head.S | 4 ++-- xen/arch/arm/arm64/head.S | 6 +++--- xen/include/asm-arm/processor.h | 10 ++++++---- 3 files changed, 11 insertions(+), 9 deletions(-) diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S index 510ccff..92b3c48 100644 --- a/xen/arch/arm/arm32/head.S +++ b/xen/arch/arm/arm32/head.S @@ -127,9 +127,9 @@ common_start: * find that multiprocessor extensions are * present and the system is SMP */ mrc CP32(r1, MPIDR) - tst r1, #(1<<31) /* Multiprocessor extension supported? */ + tst r1, #MPIDR_SMP /* Multiprocessor extension supported? */ beq 1f - tst r1, #(1<<30) /* Uniprocessor system? */ + tst r1, #MPIDR_UP /* Uniprocessor system? */ bne 1f bic r7, r1, #(~MPIDR_HWID_MASK) /* Mask out flags to get CPU ID */ 1: diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S index b2d44cc..062645e 100644 --- a/xen/arch/arm/arm64/head.S +++ b/xen/arch/arm/arm64/head.S @@ -153,10 +153,10 @@ common_start: * find that multiprocessor extensions are * present and the system is SMP */ mrs x0, mpidr_el1 - tbz x0, 31, 1f /* Multiprocessor extension not supported? */ - tbnz x0, 30, 1f /* Uniprocessor system? */ + tbz x0, _MPIDR_SMP, 1f /* Multiprocessor extension not supported? */ + tbnz x0, _MPIDR_UP, 1f /* Uniprocessor system? */ - mov x13, #(0xff << 24) + mov x13, #(~MPIDR_HWID_MASK) bic x24, x0, x13 /* Mask out flags to get CPU ID */ 1: diff --git a/xen/include/asm-arm/processor.h b/xen/include/asm-arm/processor.h index 0646422..5294421 100644 --- a/xen/include/asm-arm/processor.h +++ b/xen/include/asm-arm/processor.h @@ -8,11 +8,13 @@ #define MIDR_MASK 0xff0ffff0 /* MPIDR Multiprocessor Affinity Register */ -#define MPIDR_UP (1 << 30) -#define MPIDR_SMP (1 << 31) +#define _MPIDR_UP (30) +#define MPIDR_UP (_AC(1,U) << _MPIDR_UP) +#define _MPIDR_SMP (31) +#define MPIDR_SMP (_AC(1,U) << _MPIDR_SMP) #define MPIDR_AFF0_SHIFT (0) -#define MPIDR_AFF0_MASK (0xff << MPIDR_AFF0_SHIFT) -#define MPIDR_HWID_MASK 0xffffff +#define MPIDR_AFF0_MASK (_AC(0xff,U) << MPIDR_AFF0_SHIFT) +#define MPIDR_HWID_MASK _AC(0xffffff,U) #define MPIDR_INVALID (~MPIDR_HWID_MASK) /* TTBCR Translation Table Base Control Register */ -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |