Struct kernel_hal::vdso::VdsoConstants

#[repr(C)]
pub struct VdsoConstants {
    pub max_num_cpus: u32,
    pub features: Features,
    pub dcache_line_size: u32,
    pub icache_line_size: u32,
    pub ticks_per_second: u64,
    pub ticks_to_mono_numerator: u32,
    pub ticks_to_mono_denominator: u32,
    pub physmem: u64,
    pub version_string_len: u64,
    pub version_string: VersionString,
}

This struct contains constants that are initialized by the kernel once at boot time. From the vDSO code’s perspective, they are read-only data that can never change. Hence, no synchronization is required to read them.

Fields

max_num_cpus: u32

Maximum number of CPUs that might be online during the lifetime of the booted system.

features: Features

Bit map indicating features.

dcache_line_size: u32

Number of bytes in a data cache line.

icache_line_size: u32

Number of bytes in an instruction cache line.

ticks_per_second: u64

Conversion factor for zx_ticks_get return values to seconds.

ticks_to_mono_numerator: u32

Ratio which relates ticks (zx_ticks_get) to clock monotonic.

Specifically: ClockMono(ticks) = (ticks * N) / D

ticks_to_mono_denominator: u32

physmem: u64

Total amount of physical memory in the system, in bytes.

version_string_len: u64

Actual length of version_string, not including the NUL terminator.

version_string: VersionString

A NUL-terminated UTF-8 string returned by zx_system_get_version_string.

Implementations

impl VdsoConstants

pub fn set_version_string(&mut self, s: &str)

Set version string.

Trait Implementations

impl Debug for VdsoConstants

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.