mirror of
https://github.com/justinian/jsix.git
synced 2025-12-10 00:14:32 -08:00
Justin C. Miller
09575370ce
In preparation for removing more from page manager, removed several unecessary functions and all their callsites.
117 lines
3.3 KiB
C++
117 lines
3.3 KiB
C++
#pragma once
|
|
/// \file apic.h
|
|
/// Classes to control both local and I/O APICs.
|
|
|
|
#include <stdint.h>
|
|
|
|
enum class isr : uint8_t;
|
|
|
|
/// Base class for other APIC types
|
|
class apic
|
|
{
|
|
public:
|
|
/// Constructor
|
|
/// \arg base Physical base address of the APIC's MMIO registers
|
|
apic(uintptr_t base);
|
|
|
|
protected:
|
|
uint32_t *m_base;
|
|
};
|
|
|
|
|
|
/// Controller for processor-local APICs
|
|
class lapic :
|
|
public apic
|
|
{
|
|
public:
|
|
/// Constructor
|
|
/// \arg base Physicl base address of the APIC's MMIO registers
|
|
/// \arg spurious Vector of the spurious interrupt handler
|
|
lapic(uintptr_t base, isr spurious);
|
|
|
|
/// Enable interrupts for the LAPIC timer.
|
|
/// \arg vector Interrupt vector the timer should use
|
|
/// \arg repeat If false, this timer is one-off, otherwise repeating
|
|
void enable_timer(isr vector, bool repeat = true);
|
|
|
|
/// Reset the timer countdown.
|
|
/// \arg interval The interval in us before an interrupt, or 0 to stop the timer
|
|
/// \returns The interval in us that was remaining before reset
|
|
uint32_t reset_timer(uint64_t interval);
|
|
|
|
/// Stop the timer.
|
|
/// \returns The interval in us remaining before an interrupt was to happen
|
|
inline uint32_t stop_timer() { return reset_timer(0); }
|
|
|
|
/// Enable interrupts for the LAPIC LINT0 pin.
|
|
/// \arg num Local interrupt number (0 or 1)
|
|
/// \arg vector Interrupt vector LINT0 should use
|
|
/// \arg nmi Whether this interrupt is NMI delivery mode
|
|
/// \arg flags Flags for mode/polarity (ACPI MPS INTI flags)
|
|
void enable_lint(uint8_t num, isr vector, bool nmi, uint16_t flags);
|
|
|
|
void enable(); ///< Enable servicing of interrupts
|
|
void disable(); ///< Disable (temporarily) servicing of interrupts
|
|
|
|
/// Calibrate the timer speed against the clock
|
|
void calibrate_timer();
|
|
|
|
private:
|
|
inline uint64_t ticks_to_us(uint32_t ticks) const {
|
|
return static_cast<uint64_t>(ticks) / m_ticks_per_us;
|
|
}
|
|
|
|
inline uint64_t us_to_ticks(uint64_t interval) const {
|
|
return interval * m_ticks_per_us;
|
|
}
|
|
|
|
void set_divisor(uint8_t divisor);
|
|
void set_repeat(bool repeat);
|
|
|
|
uint32_t m_divisor;
|
|
uint32_t m_ticks_per_us;
|
|
};
|
|
|
|
|
|
/// Controller for I/O APICs
|
|
class ioapic :
|
|
public apic
|
|
{
|
|
public:
|
|
/// Constructor
|
|
/// \arg base Physical base address of the APIC's MMIO registers
|
|
/// \arg base_gsi Starting global system interrupt number of this IOAPIC
|
|
ioapic(uintptr_t base, uint32_t base_gsi);
|
|
|
|
uint32_t get_base_gsi() const { return m_base_gsi; }
|
|
uint32_t get_num_gsi() const { return m_num_gsi; }
|
|
|
|
/// Set a redirection entry.
|
|
/// TODO: pick CPU
|
|
/// \arg source Source interrupt number
|
|
/// \arg vector Interrupt vector that should be used
|
|
/// \arg flags Flags for mode/polarity (ACPI MPS INTI flags)
|
|
/// \arg masked Whether the iterrupt should be suppressed
|
|
void redirect(uint8_t irq, isr vector, uint16_t flags, bool masked);
|
|
|
|
/// Mask or unmask an interrupt to stop/start having it sent to the CPU
|
|
/// \arg irq The IOAPIC-local irq number
|
|
/// \arg masked Whether to suppress this interrupt
|
|
void mask(uint8_t irq, bool masked);
|
|
|
|
/// Mask all interrupts on this IOAPIC.
|
|
void mask_all() { for(int i=0; i<m_num_gsi; ++i) mask(i, true); }
|
|
|
|
/// Unmask all interrupts on this IOAPIC.
|
|
void unmask_all() { for(int i=0; i<m_num_gsi; ++i) mask(i, false); }
|
|
|
|
void dump_redirs() const;
|
|
|
|
private:
|
|
uint32_t m_base_gsi;
|
|
uint32_t m_num_gsi;
|
|
|
|
uint8_t m_id;
|
|
uint8_t m_version;
|
|
};
|