Commit 8a71f0c6 authored by Will Deacon's avatar Will Deacon

arm64: sysreg: replace open-coded mrs_s/msr_s with {read,write}_sysreg_s

Similar to our {read,write}_sysreg accessors for architected, named
system registers, this patch introduces {read,write}_sysreg_s variants
that can take arbitrary sys_reg output and therefore access IMPDEF
registers or registers that unsupported by binutils.
Reviewed-by: default avatarMark Rutland <mark.rutland@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 0e27a7fc
...@@ -93,11 +93,7 @@ ...@@ -93,11 +93,7 @@
#include <asm/sysreg.h> #include <asm/sysreg.h>
#define read_cpuid(reg) ({ \ #define read_cpuid(reg) read_sysreg_s(SYS_ ## reg)
u64 __val; \
asm("mrs_s %0, " __stringify(SYS_ ## reg) : "=r" (__val)); \
__val; \
})
/* /*
* The CPU ID never changes at run time, so we might as well tell the * The CPU ID never changes at run time, so we might as well tell the
......
...@@ -274,6 +274,21 @@ asm( ...@@ -274,6 +274,21 @@ asm(
: : "rZ" (__val)); \ : : "rZ" (__val)); \
} while (0) } while (0)
/*
* For registers without architectural names, or simply unsupported by
* GAS.
*/
#define read_sysreg_s(r) ({ \
u64 __val; \
asm volatile("mrs_s %0, " __stringify(r) : "=r" (__val)); \
__val; \
})
#define write_sysreg_s(v, r) do { \
u64 __val = (u64)v; \
asm volatile("msr_s " __stringify(r) ", %0" : : "rZ" (__val)); \
} while (0)
static inline void config_sctlr_el1(u32 clear, u32 set) static inline void config_sctlr_el1(u32 clear, u32 set)
{ {
u32 val; u32 val;
......
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