diff options
| author | Christian Cunningham <cc@localhost> | 2022-02-01 19:39:36 -0700 |
|---|---|---|
| committer | Christian Cunningham <cc@localhost> | 2022-02-01 19:39:36 -0700 |
| commit | 98793badc1c1d3e4bfd735fdecd3d2d731701ab3 (patch) | |
| tree | 3406220e55b0e7cce3895817796f75bf754da6d9 /include | |
| parent | 33e35caf1104cdf5b8e1470112677f78b5e8dc59 (diff) | |
Syscall to get timer value
Diffstat (limited to 'include')
| -rw-r--r-- | include/cpu.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/cpu.h b/include/cpu.h index cccc12b..c15c086 100644 --- a/include/cpu.h +++ b/include/cpu.h @@ -82,6 +82,20 @@ static inline void* getirqstack(void) #define sys0(sys_n) asm volatile("svc #" syscall_h_expand_and_quote(sys_n) ::: "r0", "r1", "r2", "r3"); #define sys1(sys_n,arg0) asm volatile("svc #" syscall_h_expand_and_quote(sys_n) ::[r0]"r"(arg0): "r0", "r1", "r2", "r3"); +__attribute__((always_inline)) static inline unsigned long long get_sys_time(void) +{ + union { + struct { + unsigned long lo; + unsigned long hi; + }s; + unsigned long long llv; + }t; + asm volatile("svc #1\nmov %0, r0\nmov %0, r1" : "=r"(t.s.lo), "=r"(t.s.hi)); + return t.llv; +} + #define SYS_SCHED 2 +#define SYS_TIME 1 #endif |