Commit 3c295687 authored by Marc Zyngier's avatar Marc Zyngier

ARM: KVM: Add system register accessor macros

In order to move system register (CP15, mostly) access to C code,
add a few macros to facilitate this, and minimize the difference
between 32 and 64bit CP15 registers.

This will get heavily used in the following patches.
Acked-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent 08dcbfda
...@@ -27,4 +27,19 @@ ...@@ -27,4 +27,19 @@
#define kern_hyp_va(v) (v) #define kern_hyp_va(v) (v)
#define hyp_kern_va(v) (v) #define hyp_kern_va(v) (v)
#define __ACCESS_CP15(CRn, Op1, CRm, Op2) \
"mrc", "mcr", __stringify(p15, Op1, %0, CRn, CRm, Op2), u32
#define __ACCESS_CP15_64(Op1, CRm) \
"mrrc", "mcrr", __stringify(p15, Op1, %Q0, %R0, CRm), u64
#define __write_sysreg(v, r, w, c, t) asm volatile(w " " c : : "r" ((t)(v)))
#define write_sysreg(v, ...) __write_sysreg(v, __VA_ARGS__)
#define __read_sysreg(r, w, c, t) ({ \
t __val; \
asm volatile(r " " c : "=r" (__val)); \
__val; \
})
#define read_sysreg(...) __read_sysreg(__VA_ARGS__)
#endif /* __ARM_KVM_HYP_H__ */ #endif /* __ARM_KVM_HYP_H__ */
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