ioapic.c File Reference

#include <stdbool.h>
#include <stdint.h>
#include <sys/kassert.h>
#include <sys/kdebug.h>
#include <sys/cdefs.h>
#include <machine/amd64.h>
#include <machine/pmap.h>
#include <machine/trap.h>

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Macros
#define	IOAPICBASE   0xFEC00000
#define	IOAPICID   0x00 /* IOAPIC ID */
#define	IOAPICVER   0x01 /* IOAPIC Version */
#define	IOAPICARB   0x02 /* IOAPIC Arbitration ID */
#define	IOREDTBL0   0x10
#define	IOREDTBL23   0x3E
#define	IOREDTBL_LEN   24
#define	IOREDTBL_MASK   0x00010000
#define	IOREDTBL_LOGICAL   0x00000800

Functions
uint32_t	IOAPIC_Read (uint32_t reg)
void	IOAPIC_Write (uint32_t reg, uint32_t val)
void	IOAPIC_Init ()
void	IOAPIC_Enable (int irq)
void	IOAPIC_Disable (int irq)
static void	Debug_IOAPIC (int argc, const char *argv[])
	REGISTER_DBGCMD (ioapic, "IOAPIC Dump", Debug_IOAPIC)

Macro Definition Documentation

IOAPICARB

#define IOAPICARB   0x02 /* IOAPIC Arbitration ID */

Definition at line 20 of file ioapic.c.

IOAPICBASE

#define IOAPICBASE   0xFEC00000

Definition at line 16 of file ioapic.c.

IOAPICID

#define IOAPICID   0x00 /* IOAPIC ID */

Definition at line 18 of file ioapic.c.

IOAPICVER

#define IOAPICVER   0x01 /* IOAPIC Version */

Definition at line 19 of file ioapic.c.

IOREDTBL0

#define IOREDTBL0   0x10

Definition at line 21 of file ioapic.c.

IOREDTBL23

#define IOREDTBL23   0x3E

Definition at line 22 of file ioapic.c.

IOREDTBL_LEN

#define IOREDTBL_LEN   24

Definition at line 24 of file ioapic.c.

IOREDTBL_LOGICAL

#define IOREDTBL_LOGICAL   0x00000800

Definition at line 27 of file ioapic.c.

IOREDTBL_MASK

#define IOREDTBL_MASK   0x00010000

Definition at line 26 of file ioapic.c.

Function Documentation

Debug_IOAPIC()

static void Debug_IOAPIC ( int  argc, const char *  argv[]  )

static

Definition at line 84 of file ioapic.c.

{
    int i;
 
    kprintf("IOAPIC ID:      %08x\n", IOAPIC_Read(IOAPICID));
    kprintf("IOAPIC VERSION: %08x\n", IOAPIC_Read(IOAPICVER));
 
    for (i = 0; i < IOREDTBL_LEN; i++)
    {
        uint32_t irqInfo = IOAPIC_Read(IOREDTBL0 + 2*i);
        uint32_t cpuInfo = IOAPIC_Read(IOREDTBL0 + 2*i + 1);
        kprintf("%02x: %08x %08x\n", i, irqInfo, cpuInfo);
    }
}

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IOAPIC_Disable()

void IOAPIC_Disable

(

int

irq

)

Definition at line 77 of file ioapic.c.

{
    uint32_t val = IOAPIC_Read(IOREDTBL0 + 2*irq);
    IOAPIC_Write(IOREDTBL0 + 2*irq, val | IOREDTBL_MASK);
}

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IOAPIC_Enable()

void IOAPIC_Enable

(

int

irq

)

Definition at line 70 of file ioapic.c.

{
    uint32_t val = IOAPIC_Read(IOREDTBL0 + 2*irq);
    IOAPIC_Write(IOREDTBL0 + 2*irq, val & ~IOREDTBL_MASK);
}

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IOAPIC_Init()

void IOAPIC_Init

(

)

Definition at line 54 of file ioapic.c.

{
    int i;
    uint32_t id = (IOAPIC_Read(IOAPICID) >> 24) & 0x0F;
    uint32_t maxInts = (IOAPIC_Read(IOAPICVER) >> 16) & 0xFF;
 
    kprintf("IOAPIC: ID:%d Max Interrupts: %d\n", id, maxInts);
 
    for (i = 0; i < IOREDTBL_LEN; i++)
    {
        IOAPIC_Write(IOREDTBL0 + 2*i, IOREDTBL_MASK | (T_IRQ_BASE + i));
        IOAPIC_Write(IOREDTBL0 + 2*i + 1, 0);
    }
}

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IOAPIC_Read()

uint32_t IOAPIC_Read

(

uint32_t

reg

)

Definition at line 30 of file ioapic.c.

{
    uint32_t volatile *addr = (uint32_t volatile *)DMPA2VA(IOAPICBASE);
    uint32_t volatile *cmd = (uint32_t volatile *)DMPA2VA(IOAPICBASE + 0x10);
 
    ASSERT(reg <= 0xFF);
 
    *addr = reg;
    return *cmd;
}

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IOAPIC_Write()

void IOAPIC_Write	(	uint32_t	reg,
		uint32_t	val
	)

Definition at line 42 of file ioapic.c.

{
    uint32_t volatile *addr = (uint32_t volatile *)DMPA2VA(IOAPICBASE);
    uint32_t volatile *cmd = (uint32_t volatile *)DMPA2VA(IOAPICBASE + 0x10);
 
    ASSERT(reg <= 0xFF);
 
    *addr = reg;
    *cmd = val;
}

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REGISTER_DBGCMD()

REGISTER_DBGCMD	(	ioapic	,
		"IOAPIC Dump"	,
		Debug_IOAPIC
	)