49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
#pragma once
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#include "../../../main.h"
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Default location for PIC INT/IRQ remap
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#define IRQ_PIC_INT_OFFSET_MASTER 0x20 // INT20h...INT27h
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#define IRQ_PIC_INT_OFFSET_SLAVE 0x28 // INT28h...INT2fh
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// Init PIC, mask all irqs
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void irq_pic_Init();
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// remap Master PIC to INToff_master...+7, Slave to INToff_slave...+7
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void irq_pic_InitRemap(int offset_master, int offset_slave);
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// Mask(disable) / Unmask(enable) certain IRQ line
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void irq_pic_Mask(uint8_t irq_line, bool masked);
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// Disable legacy PIC (masks all IRQ lines)
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SYSV_ABI void irq_pic_Disable(); // defined in assembly
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// Get the combined 16 bits of Interrupt-Request-Register and In-Service-Register
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uint16_t irq_pic_GetIRR();
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uint16_t irq_pic_GetISR();
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// void(uintptr_t) for IRQ handlers, no need to call out8(OCW2, 0x6*)
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typedef SYSV_ABI void (*irq_pic_IRQHandlerType)(uintptr_t);
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// defined in pic_init.c
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extern void * irq_pic_IRQHandler[16];
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extern uintptr_t irq_pic_IRQHandler_Data[16]; // written into RDI on handler (first argument)
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extern bool irq_pic_Enabled;
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// If IRQHandlerRaw[irq] is not NULL, the function is jumped to (not called).
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//
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// So the handler should use IRET instead of RET, and save all the registers it uses.
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extern void *irq_pic_IRQHandlerRaw[16];
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#ifdef __cplusplus
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}
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#endif
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