forked from lolo859/vystem
32 lines
1.0 KiB
C
32 lines
1.0 KiB
C
// SPDX-License-Identifier: MPL-2.0
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#ifndef SH_LIB_TSC_H
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#define SH_LIB_TSC_H
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#include "std/type.h"
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#include "std/status.h"
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#include "cpu/asm.h"
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#include "devs/devs.h"
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typedef sh_uint64 sh_tsc_TSC_VALUE;
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// Reas TSC register.
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static inline sh_tsc_TSC_VALUE sh_tsc_read_tsc() {
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return sh_asm_rdtsc();
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}
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// Init kernel start tsc. Intended for single use only.
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SH_STATUS sh_tsc_init_tsc();
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// Return kernel start tsc.
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sh_tsc_TSC_VALUE sh_tsc_get_kernel_init_tsc();
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// Return kernel current tsc.
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sh_tsc_TSC_VALUE sh_tsc_get_kernel_current_tsc();
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// Estimate CPU frequency using TSC and PIT
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sh_uint64 sh_tsc_estimate_cpu_freq();
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// Load CPU frequency
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void sh_tsc_load_cpu_freq(sh_uint64 cpu_freq);
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// Detect if CPUID provide hypervisor bit
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sh_bool sh_tsc_has_hypervisor();
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// Detect if CPUID provide TSC constant bit
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sh_bool sh_tsc_is_tsc_constant();
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// Return CPUID CPU frequence if available
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SH_STATUS sh_tsc_get_cpu_freq_cpuid(sh_uint64 *freq);
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// Parse a TSC DevS query
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SH_STATUS sh_tsc_devs_query(char *sub_path,sh_devs_RESULT *result);
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#endif
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