| /* Copyright 2018 SiFive, Inc */ |
| /* SPDX-License-Identifier: Apache-2.0 */ |
| |
| #include <sys/time.h> |
| #include <sys/times.h> |
| #include <metal/cpu.h> |
| #include <metal/timer.h> |
| #include <metal/machine.h> |
| |
| #if defined(__METAL_DT_MAX_HARTS) |
| /* This implementation serves as a small shim that interfaces with the first |
| * timer on a system. */ |
| int metal_timer_get_cyclecount(int hartid, unsigned long long *mcc) |
| { |
| struct metal_cpu *cpu = metal_cpu_get(hartid); |
| |
| if ( cpu ) { |
| *mcc = metal_cpu_get_timer(cpu); |
| return 0; |
| } |
| return -1; |
| } |
| |
| int metal_timer_get_timebase_frequency(int hartid, unsigned long long *timebase) |
| { |
| struct metal_cpu *cpu = metal_cpu_get(hartid); |
| |
| if ( cpu ) { |
| *timebase = metal_cpu_get_timebase(cpu); |
| return 0; |
| } |
| return -1; |
| } |
| |
| int metal_timer_get_machine_time(int hartid) |
| { |
| struct metal_cpu *cpu = metal_cpu_get(hartid); |
| |
| if ( cpu ) { |
| return metal_cpu_get_mtime(cpu); |
| } |
| return 0; |
| } |
| |
| int metal_timer_set_machine_time(int hartid, unsigned long long time) |
| { |
| struct metal_cpu *cpu = metal_cpu_get(hartid); |
| |
| if ( cpu ) { |
| return metal_cpu_set_mtimecmp(cpu, time); |
| } |
| return -1; |
| } |
| |
| #else |
| |
| /* This implementation of gettimeofday doesn't actually do anything, it's just there to |
| * provide a shim and return 0 so we can ensure that everything can link to _gettimeofday. |
| */ |
| int nop_cyclecount(int id, unsigned long long *c) __attribute__((section(".text.metal.nop.cyclecount"))); |
| int nop_cyclecount(int id, unsigned long long *c) { return -1; } |
| int nop_timebase(unsigned long long *t) __attribute__((section(".text.metal.nop.timebase"))); |
| int nop_timebase(unsigned long long *t) { return -1; } |
| int nop_tick(int second) __attribute__((section(".text.metal.nop.tick"))); |
| int nop_tick(int second) { return -1; } |
| int metal_timer_get_cyclecount(int hartid, unsigned long long *c) __attribute__((weak, alias("nop_cyclecount"))) |
| { |
| #pragma message("There is no default timer device, metal_timer_get_cyclecount() will always return cyclecount -1.") |
| } |
| int metal_timer_get_timebase_frequency(unsigned long long *t) __attribute__((weak, alias("nop_timebase"))) |
| { |
| #pragma message("There is no default timer device, metal_timer_get_timebase_frequency() will always return timebase -1.") |
| } |
| int metal_timer_set_tick(int second) __attribute__((weak, alias("nop_tick"))) |
| { |
| #pragma message("There is no default timer device, metal_timer_set_tick) will always return -1.") |
| } |
| |
| #endif |
| |