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250 lines
6.0 KiB
250 lines
6.0 KiB
;/*
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;++
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;
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; Copyright (c) 1989 Microsoft Corporation
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;
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; Module Name:
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;
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; ix8259.inc
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;
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; Abstract:
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;
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; This module contains the definitions used by HAL to manipulate
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; 8259 interrupt controller and 8259-specific constants.
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;
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; WARNING: This file is included by both ASM and C files.
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;
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; Author:
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;
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; John Vert (jvert) 31-Dec-1991
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;
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; (Moved from ke\i386\kimacro.inc)
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;
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;--
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if 0 ; Begin C only code */
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//
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// 8259 defines for C code
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// BE SURE TO CHANGE THESE VALUES IN BOTH TABLES!
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//
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#define HIGHEST_LEVEL_FOR_8259 27 // Highest level for standard 8259
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#define PRIMARY_VECTOR_BASE 0x30 // Vector base for standard 8259
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#if defined(NEC_98)
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#if defined(NT_UP_98)
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#define PROFILE_VECTOR (PRIMARY_VECTOR_BASE + 0) // standard profile
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#else
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#define PROFILE_VECTOR (PRIMARY_VECTOR_BASE + 15) // standard profile
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#endif
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#else // defined(NEC_98)
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#define PROFILE_VECTOR (PRIMARY_VECTOR_BASE + 8) // standard profile
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#endif // defined(NEC_98)
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#define CLOCK_VECTOR (PRIMARY_VECTOR_BASE + 0) // standard clock
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#define I386_80387_IRQ 0x0d // standard npx
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#define I386_80387_IRQL (HIGHEST_LEVEL_FOR_8259 - I386_80387_IRQ)
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#define I386_80387_VECTOR (PRIMARY_VECTOR_BASE + I386_80387_IRQ)
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#define PIC_VECTORS 16
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#define V2I(a) (a-PRIMARY_VECTOR_BASE) // Vector to interrupt macro
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#define I386_80387_BUSY_PORT (PUCHAR)0xF0
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#ifndef NEC_98
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#define PIC_SLAVE_IRQ 2
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#define PIC_SLAVE_REDIRECT 9
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#else
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#define PIC_SLAVE_IRQ 7
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#define PIC_SLAVE_REDIRECT 8
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#endif
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#define EISA_EDGE_LEVEL0 0x4D0
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#define EISA_EDGE_LEVEL1 0x4D1
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/*
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endif
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;
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; Same 8259 defines for assemble code
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; BE SURE TO CHANGE THESE VALUES IN BOTH TABLES!
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;
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HIGHEST_LEVEL_FOR_8259 equ 27
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PRIMARY_VECTOR_BASE equ 30h
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ifdef NEC_98
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ifdef NT_UP_98
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PROFILE_VECTOR equ (PRIMARY_VECTOR_BASE + 0)
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else
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PROFILE_VECTOR equ (PRIMARY_VECTOR_BASE + 15)
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endif
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else ; NEC_98
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PROFILE_VECTOR equ (PRIMARY_VECTOR_BASE + 8)
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endif ; NEC_98
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CLOCK_VECTOR equ (PRIMARY_VECTOR_BASE + 0)
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I386_80387_IRQ equ 0dh
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I386_80387_IRQL equ (HIGHEST_LEVEL_FOR_8259 - I386_80387_IRQ)
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I386_80387_VECTOR equ (PRIMARY_VECTOR_BASE + I386_80387_IRQ)
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I386_80387_BUSY_PORT equ 0f0h ; port to dismiss busy error line
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ifdef NEC_98
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PIC_SLAVE_IRQ equ 7
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else
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PIC_SLAVE_IRQ equ 2
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endif
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;
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; The rest of the file are macros used in assemble only.
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;
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;++
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;
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; SET_8259_MASK
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;
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; Macro Description:
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;
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; This macro sets 8259 interrupt mask register with the mask
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; passed from eax register.
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;
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; Note: Currently, only two 8259s are support. As a result,
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; only ax contains valid mask.
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;
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; Arguments:
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;
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; (eax) = mask for setting 8259 interrupt mask register
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;
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;--
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SET_8259_MASK macro
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local a ; define local labels
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out PIC1_PORT1, al ; set master 8259 mask
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shr eax, 8 ; shift slave 8259 mask to al
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out PIC2_PORT1, al ; set slave 8259 mask
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a:
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endm
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;
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; Interrupt controller register addresses
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;
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ifdef NEC_98
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PIC1_PORT0 equ 00H
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PIC1_PORT1 equ 02H
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PIC2_PORT0 equ 08H
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PIC2_PORT1 equ 0AH
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else ; NEC_98
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PIC1_PORT0 equ 020H
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PIC1_PORT1 equ 021H
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PIC2_PORT0 equ 0A0H
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PIC2_PORT1 equ 0A1H
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endif ; NEC_98
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EISA_EDGE_LEVEL0 EQU 4D0h
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EISA_EDGE_LEVEL1 EQU 4D1h
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;
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; Commands for Interrupt controller
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;
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PIC1_EOI_MASK equ 060H
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ifdef NEC_98
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PIC2_EOI equ 067H ; special EOI
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else ; NEC_98
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PIC2_EOI equ 062H
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endif ; NEC_98
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OCW2_NON_SPECIFIC_EOI equ 020H
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OCW2_SPECIFIC_EOI equ 060H
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OCW3_READ_ISR equ 0BH
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OCW3_READ_IRR equ 0AH
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;++
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;
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; IODELAY
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;
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; Macro Description:
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;
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; This macro simply does a jmp to next instruction to synchronize
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; IO port access.
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;
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; Arguments:
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;
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; None
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;
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;--
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IODELAY macro
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ifdef NEC_98
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out 5fh,al ; same effect with "stdcall IODelay8259"
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else ; NEC_98
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jmp $+2
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endif ; NEC_98
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endm
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;++
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;
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; PICDELAY
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;
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; Macro Description:
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;
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; This macro does an inb on interrupt mask register to provide the
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; time for 8259 to get stabled.
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;
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; Why do we need this?
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;
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; This is because:
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; . The 80386 has a delayed write to memory and delayed output to IO
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; capability and
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; . 8259 needs some time to settle
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;
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; It is possible for the actual output cycle to 8259 to occur after
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; the completion of instructions following the out instruction. For
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; example, the STI instruction after SET_MASK and dismiss interrupt
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; macros may complete before 8259 actually drops the interrupt. We don't
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; want this happen in MCA system.
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;
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; You may argue that most OEMS add about 450ns delay to solve the
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; back-to-back IO (delay) problem. But, remember that STI is not an IO
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; instruction.
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;
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; Arguments:
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;
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; None
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;
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; NOTE: * The content of AL will be destroyed on return.
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;
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;--
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PIC1DELAY macro
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in al, PIC1_PORT1
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endm
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PIC2DELAY macro
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in al, PIC2_PORT1
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endm
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;++
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;
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; SOFT_INTERRUPT_EXIT
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;
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; Macro Description:
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;
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; This macro is executed on return from the soft interrupt
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; service routine. Its function is to restore privileged processor
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; state, and continue thread execution.
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;
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; Arguments:
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;
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; (TOS) = previous irql
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; (TOS+4 ...) = machine_state frame
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;
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;--
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SOFT_INTERRUPT_EXIT macro
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EXTRNP _HalpEndSoftwareInterrupt,1
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cli
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call _HalpEndSoftwareInterrupt@4 ; restore irql
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SPURIOUS_INTERRUPT_EXIT ; exit interrupt without EOI
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endm
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;*/
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