mp.h File Reference

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Macros
#define	CPUSTATE_NOT_PRESENT   0
#define	CPUSTATE_BOOTED   1
#define	CPUSTATE_HALTED   2
#define	CPUSTATE_MAX   2
#define	THISCPU   LAPIC_CPU

Typedefs
typedef int(*	CrossCallCB) (void *)

Functions
void	MP_Init ()
void	MP_InitAP ()
void	MP_SetState (int state)
int	MP_GetCPUs ()
void	MP_CrossCallTrap ()
int	MP_CrossCall (CrossCallCB cb, void *arg)
uint32_t	LAPIC_CPU ()

Macro Definition Documentation

CPUSTATE_BOOTED

#define CPUSTATE_BOOTED   1

Definition at line 6 of file mp.h.

CPUSTATE_HALTED

#define CPUSTATE_HALTED   2

Definition at line 7 of file mp.h.

CPUSTATE_MAX

#define CPUSTATE_MAX   2

Definition at line 8 of file mp.h.

CPUSTATE_NOT_PRESENT

#define CPUSTATE_NOT_PRESENT   0

Definition at line 5 of file mp.h.

THISCPU

#define THISCPU   LAPIC_CPU

Definition at line 21 of file mp.h.

Typedef Documentation

CrossCallCB

typedef int(* CrossCallCB) (void *)

Definition at line 16 of file mp.h.

Function Documentation

LAPIC_CPU()

uint32_t LAPIC_CPU

(

)

Definition at line 93 of file lapic.c.

{
    if (lapicInitialized)
        return LAPIC_Read(LAPIC_ID) >> 24;
    else
        return 0;
}

MP_CrossCall()

int MP_CrossCall	(	CrossCallCB	cb,
		void *	arg
	)

Definition at line 168 of file mp.c.

{
    volatile CrossCallFrame frame;
 
    // Setup frame
    memset((void *)&frame, 0, sizeof(frame));
    frame.cb = cb;
    frame.arg = arg;
    frame.count = 1;
 
    Critical_Enter();
 
    cpus[CPU()].frame = (CrossCallFrame *)&frame;
    cpuid(0, 0, 0, 0, 0);
 
    if (LAPIC_Broadcast(T_CROSSCALL) < 0)
        return -1;
 
    // Run on the local CPU
    frame.status[CPU()] = cb(arg);
    frame.done[CPU()] = 1;
 
    // Wait for all to respond
    while (frame.count < lastCPU) {
        // Check for timeout
 
        // XXX: Should dump the crosscall frame
    }
    cpus[CPU()].frame = NULL;
    cpuid(0, 0, 0, 0, 0);
 
    Critical_Exit();
 
    return 0;
}

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MP_CrossCallTrap()

void MP_CrossCallTrap

(

)

Definition at line 140 of file mp.c.

{
    int c;
 
    cpuid(0, 0, 0, 0, 0);
 
    Critical_Enter();
 
    for (c = 0; c <= lastCPU; c++) {
        CrossCallFrame *frame = cpus[c].frame;
        if (frame == NULL)
            continue;
 
        if (frame->done[CPU()] == 1)
            continue;
 
        frame->status[CPU()] = (frame->cb)(frame->arg);
        frame->done[CPU()] = 1;
 
        // Increment
        __sync_add_and_fetch(&frame->count, 1);
    }
 
    Critical_Exit();
}

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MP_GetCPUs()

int MP_GetCPUs

(

)

Definition at line 134 of file mp.c.

{
    return lastCPU;
}

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MP_Init()

void MP_Init

(

)

Definition at line 91 of file mp.c.

{
    int i;
    kprintf("Booting on CPU %u\n", CPU());
 
    cpus[CPU()].state = CPUSTATE_BOOTED;
    cpus[CPU()].frame = NULL;
 
    for (i = 1; i < MAX_CPUS; i++) {
        cpus[i].state = CPUSTATE_NOT_PRESENT;
        cpus[i].frame = NULL;
    }
 
    /*
     * XXX: We really should read from the MP Table, but this appears to be 
     * reliable for now.
     */
    lastCPU = 0;
    for (i = 1; i < MAX_CPUS; i++) {
        if (MPBootAP(i) < 0)
            break;
 
        lastCPU = i;
    }
    lastCPU++;
}

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MP_InitAP()

void MP_InitAP

(

)

Definition at line 119 of file mp.c.

{
    kprintf("AP %d booted!\n", CPU());
    cpus[CPU()].state = CPUSTATE_BOOTED;
    booted = 1;
}

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MP_SetState()

void MP_SetState

(

int

state

)

Definition at line 127 of file mp.c.

{
    ASSERT(state > 0 && state <= CPUSTATE_MAX);
    cpus[CPU()].state = state;
}

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