70 lines
1.8 KiB
Rust
70 lines
1.8 KiB
Rust
#[cfg(all(target_arch = "x86_64", target_os = "redox"))]
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use syscall as redox_syscall;
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use crate::Result;
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#[cfg(all(target_arch = "x86_64", target_os = "redox"))]
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pub fn acquire_iopl() -> Result<()> {
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extern "C" {
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fn redox_cur_thrfd_v0() -> usize;
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}
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let kernel_fd = redox_syscall::dup(unsafe { redox_cur_thrfd_v0() }, b"open_via_dup")?;
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let res = libredox::call::call_wo(
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kernel_fd,
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&[],
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redox_syscall::CallFlags::empty(),
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&[redox_syscall::ProcSchemeVerb::Iopl as u64],
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);
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let _ = redox_syscall::close(kernel_fd);
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res.map(|_| ()).map_err(|e| e.into())
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}
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#[cfg(all(target_arch = "x86_64", not(target_os = "redox")))]
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pub fn acquire_iopl() -> Result<()> {
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Err(crate::DriverError::Other(String::from(
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"acquire_iopl: only available on Redox",
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)))
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}
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#[cfg(target_arch = "x86_64")]
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#[inline]
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pub fn inb(port: u16) -> u8 {
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let val: u8;
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unsafe { core::arch::asm!("inb {1:x}, {0}", out(reg_byte) val, in(reg) port) };
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val
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}
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#[cfg(target_arch = "x86_64")]
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#[inline]
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pub fn outb(port: u16, val: u8) {
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unsafe { core::arch::asm!("outb {1:x}, {0}", in(reg_byte) val, in(reg) port) };
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}
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#[cfg(target_arch = "x86_64")]
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#[inline]
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pub fn inl(port: u16) -> u32 {
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let val: u32;
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unsafe { core::arch::asm!("inl {1:x}, {0:e}", out(reg) val, in(reg) port) };
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val
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}
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#[cfg(target_arch = "x86_64")]
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#[inline]
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pub fn outl(port: u16, val: u32) {
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unsafe { core::arch::asm!("outl {1:x}, {0:e}", in(reg) val, in(reg) port) };
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}
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#[cfg(target_arch = "x86_64")]
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#[inline]
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pub fn inw(port: u16) -> u16 {
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let val: u16;
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unsafe { core::arch::asm!("inw {1:x}, {0:x}", out(reg) val, in(reg) port) };
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val
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}
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#[cfg(target_arch = "x86_64")]
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#[inline]
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pub fn outw(port: u16, val: u16) {
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unsafe { core::arch::asm!("outw {1:x}, {0:x}", in(reg) val, in(reg) port) };
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}
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