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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2020-07-19 20:04:24 +0300 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-07-26 21:00:13 +0000 |
| commit | 0199d3bd7f60109796e8f97ac1bb4df0a237f7f1 (patch) | |
| tree | 588114ef227b08fe7ac119951c575809d546c79f /src/arch | |
| parent | c73178892902f43f74ad29d65e1ce8775c2d800e (diff) | |
| download | coreboot-0199d3bd7f60109796e8f97ac1bb4df0a237f7f1.tar.xz | |
arch/x86: Move cpu_relax()
It's not related to spinlocks and the actual implementation
was also guarded by CONFIG(SMP).
With a single call-site in x86-specific code, empty stubs
for other arch are currently not necessary.
Also drop an unused included on a nearby line.
Change-Id: I00439e9c1d10c943ab5e404f5d687d316768fa16
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43808
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/arm/include/armv4/arch/smp/spinlock.h | 1 | ||||
| -rw-r--r-- | src/arch/x86/include/arch/cpu.h | 6 | ||||
| -rw-r--r-- | src/arch/x86/include/arch/smp/spinlock.h | 7 |
3 files changed, 6 insertions, 8 deletions
diff --git a/src/arch/arm/include/armv4/arch/smp/spinlock.h b/src/arch/arm/include/armv4/arch/smp/spinlock.h index 5245bd1a02..4d40f3304f 100644 --- a/src/arch/arm/include/armv4/arch/smp/spinlock.h +++ b/src/arch/arm/include/armv4/arch/smp/spinlock.h @@ -9,7 +9,6 @@ #define spin_unlock_wait(lock) do {} while (0) #define spin_lock(lock) do {} while (0) #define spin_unlock(lock) do {} while (0) -#define cpu_relax() do {} while (0) #include <smp/node.h> #define boot_cpu() 1 diff --git a/src/arch/x86/include/arch/cpu.h b/src/arch/x86/include/arch/cpu.h index 82f470ec2d..b622465a25 100644 --- a/src/arch/x86/include/arch/cpu.h +++ b/src/arch/x86/include/arch/cpu.h @@ -269,6 +269,12 @@ static inline void get_fms(struct cpuinfo_x86 *c, uint32_t tfms) } +/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ +static __always_inline void cpu_relax(void) +{ + __asm__ __volatile__("rep;nop" : : : "memory"); +} + #define asmlinkage __attribute__((regparm(0))) /* diff --git a/src/arch/x86/include/arch/smp/spinlock.h b/src/arch/x86/include/arch/smp/spinlock.h index 41189933d9..a05d47a233 100644 --- a/src/arch/x86/include/arch/smp/spinlock.h +++ b/src/arch/x86/include/arch/smp/spinlock.h @@ -62,12 +62,6 @@ static __always_inline void spin_unlock(spinlock_t *lock) : "=m" (lock->lock) : : "memory"); } -/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ -static __always_inline void cpu_relax(void) -{ - __asm__ __volatile__("rep;nop" : : : "memory"); -} - #else #define DECLARE_SPIN_LOCK(x) @@ -76,7 +70,6 @@ static __always_inline void cpu_relax(void) #define spin_unlock_wait(lock) do {} while (0) #define spin_lock(lock) do {} while (0) #define spin_unlock(lock) do {} while (0) -#define cpu_relax() do {} while (0) #endif |