1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_VDSO_GETTIMEOFDAY_H
3 #define _ASM_POWERPC_VDSO_GETTIMEOFDAY_H
7 #include <asm/ppc_asm.h>
10 * The macros sets two stack frames, one for the caller and one for the callee
11 * because there are no requirement for the caller to set a stack frame when
12 * calling VDSO so it may have omitted to set one, especially on PPC64
15 .macro cvdso_call funct
17 PPC_STLU r1, -PPC_MIN_STKFRM(r1)
20 PPC_STLU r1, -PPC_MIN_STKFRM(r1)
21 PPC_STL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
23 PPC_STL r2, PPC_MIN_STKFRM + STK_GOT(r1)
26 addi r5, r5, VDSO_DATA_OFFSET
28 PPC_LL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
30 PPC_LL r2, PPC_MIN_STKFRM + STK_GOT(r1)
35 addi r1, r1, 2 * PPC_MIN_STKFRM
44 .macro cvdso_call_time funct
46 PPC_STLU r1, -PPC_MIN_STKFRM(r1)
49 PPC_STLU r1, -PPC_MIN_STKFRM(r1)
50 PPC_STL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
52 PPC_STL r2, PPC_MIN_STKFRM + STK_GOT(r1)
55 addi r4, r4, VDSO_DATA_OFFSET
57 PPC_LL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
59 PPC_LL r2, PPC_MIN_STKFRM + STK_GOT(r1)
64 addi r1, r1, 2 * PPC_MIN_STKFRM
71 #include <asm/vdso/timebase.h>
72 #include <asm/barrier.h>
73 #include <asm/unistd.h>
74 #include <uapi/linux/time.h>
76 #define VDSO_HAS_CLOCK_GETRES 1
78 #define VDSO_HAS_TIME 1
80 static __always_inline int do_syscall_2(const unsigned long _r0, const unsigned long _r3,
81 const unsigned long _r4)
83 register long r0 asm("r0") = _r0;
84 register unsigned long r3 asm("r3") = _r3;
85 register unsigned long r4 asm("r4") = _r4;
86 register int ret asm ("r3");
93 : "=r" (ret), "+r" (r4), "+r" (r0)
95 : "memory", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "cr0", "ctr");
100 static __always_inline
101 int gettimeofday_fallback(struct __kernel_old_timeval *_tv, struct timezone *_tz)
103 return do_syscall_2(__NR_gettimeofday, (unsigned long)_tv, (unsigned long)_tz);
108 static __always_inline
109 int clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
111 return do_syscall_2(__NR_clock_gettime, _clkid, (unsigned long)_ts);
114 static __always_inline
115 int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
117 return do_syscall_2(__NR_clock_getres, _clkid, (unsigned long)_ts);
122 #define BUILD_VDSO32 1
124 static __always_inline
125 int clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
127 return do_syscall_2(__NR_clock_gettime64, _clkid, (unsigned long)_ts);
130 static __always_inline
131 int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
133 return do_syscall_2(__NR_clock_getres_time64, _clkid, (unsigned long)_ts);
136 static __always_inline
137 int clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts)
139 return do_syscall_2(__NR_clock_gettime, _clkid, (unsigned long)_ts);
142 static __always_inline
143 int clock_getres32_fallback(clockid_t _clkid, struct old_timespec32 *_ts)
145 return do_syscall_2(__NR_clock_getres, _clkid, (unsigned long)_ts);
149 static __always_inline u64 __arch_get_hw_counter(s32 clock_mode,
150 const struct vdso_data *vd)
155 const struct vdso_data *__arch_get_vdso_data(void);
157 static inline bool vdso_clocksource_ok(const struct vdso_data *vd)
161 #define vdso_clocksource_ok vdso_clocksource_ok
164 * powerpc specific delta calculation.
166 * This variant removes the masking of the subtraction because the
167 * clocksource mask of all VDSO capable clocksources on powerpc is U64_MAX
168 * which would result in a pointless operation. The compiler cannot
169 * optimize it away as the mask comes from the vdso data and is not compile
172 static __always_inline u64 vdso_calc_delta(u64 cycles, u64 last, u64 mask, u32 mult)
174 return (cycles - last) * mult;
176 #define vdso_calc_delta vdso_calc_delta
178 #ifndef __powerpc64__
179 static __always_inline u64 vdso_shift_ns(u64 ns, unsigned long shift)
185 lo |= hi << (32 - shift);
191 return ((u64)hi << 32) | lo;
193 #define vdso_shift_ns vdso_shift_ns
197 int __c_kernel_clock_gettime(clockid_t clock, struct __kernel_timespec *ts,
198 const struct vdso_data *vd);
199 int __c_kernel_clock_getres(clockid_t clock_id, struct __kernel_timespec *res,
200 const struct vdso_data *vd);
202 int __c_kernel_clock_gettime(clockid_t clock, struct old_timespec32 *ts,
203 const struct vdso_data *vd);
204 int __c_kernel_clock_gettime64(clockid_t clock, struct __kernel_timespec *ts,
205 const struct vdso_data *vd);
206 int __c_kernel_clock_getres(clockid_t clock_id, struct old_timespec32 *res,
207 const struct vdso_data *vd);
209 int __c_kernel_gettimeofday(struct __kernel_old_timeval *tv, struct timezone *tz,
210 const struct vdso_data *vd);
211 __kernel_old_time_t __c_kernel_time(__kernel_old_time_t *time,
212 const struct vdso_data *vd);
213 #endif /* __ASSEMBLY__ */
215 #endif /* _ASM_POWERPC_VDSO_GETTIMEOFDAY_H */