justin/jsix_import
1
0
Fork 0
Code Issues 1 Pull Requests Actions Packages Projects Releases Wiki Activity

Add initial IO APIC support

Browse Source 
- IO APIC vector mapping
- Legacy PIC disable
- Real interrupts happening
This commit is contained in:
Justin C. Miller
2018-05-02 16:46:37 -07:00
parent 428e4563d0
commit 59700b07db
11 changed files with 317 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
src/kernel/apic.h
View File

@@ -56,14 +56,37 @@ class ioapic :
public:
/// Constructor
/// \arg base Base virtual address of the APIC's MMIO registers
/// \arg base_gsr Starting global system interrupt number of this IOAPIC
ioapic(uint32_t *base, uint32_t base_gsr);
/// \arg base_gsi Starting global system interrupt number of this IOAPIC
ioapic(uint32_t *base, uint32_t base_gsi);
uint32_t get_base_gsr() const { return m_base_gsr; }
uint32_t get_num_gsr() const { return m_num_gsr; }
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_gsr;
uint32_t m_num_gsr;
};
uint32_t m_base_gsi;
uint32_t m_num_gsi;
uint8_t m_id;
uint8_t m_version;
};