www.pudn.com > Demo C.rar > m8260IntrCtl.c
/* m8260IntrCtl.c - Motorola Voyager MPC 8260 interrupt controller driver */
/* Copyright 1984-1999 Wind River Systems, Inc. */
#include "copyright_wrs.h"
/*
modification history
--------------------
01i,30jul01,g_h fix a problem with error interrupt.
01h,13jun01,g_h change UINT32 intVec in m8260IntrDeMux() to VINT32 because DIAB
optimize to much.
01j,16sep99,ms_ m8260IntrCtl.h comes from h/drv/intrCtl
01i,16sep99,ms_ rename m8260Int.h to m8260IntrCtl.h
01h,15jul99,ms_ make compliant with our coding standards
01g,13may99,ms_ minor fixes
01f,17apr99,ms_ final cleanup for EAR
01e,15apr99,ms_ disable only lower priority interrupts while processing
interrupt
01d,13apr99,ms_ redefine IVEC_TO_INUM and INUM_TO_IVEC to use the numbers as
shown in the MPC8260 user's manaul
01c,12apr99,ms_ remove any sio specific items; that is handled in the sio
driver
01b,29mar99,ms_ add ability to mask out lower priority interrupts when
processing an interrupt
01a,22feb99,ms_ adapted from ppc8260Intr.c version 01f
*/
/*
DESCRIPTION
The PowerPC 8260 CPU is divided in three units: PowerPC core, System
Interface Unit (SIU) and Communication Processor Unit (CPM). The PowerPC
core accepts only one external interrupt exception (vector 0x500). The SIU
provides an interrupt controller which provides 55 interrupt sources
The Interrupt controller is connected to the PowerPC core external
interrupt. This library provides the routines to manage this interrupt
controllers.
m8260IntrInit() connects the default demultiplexer, m8260IntrDeMux(), to the
external interrupt vector and initializes a table containing a function pointer
and an associated parameter for each interrupt source. m8260IntrInit() is called
by sysHwInit() from sysLib.c.
The default demultimplexer, m8260IntrDeMux() detects which peripheral or
controller has raised an interrupt and calls the associated routine with its
parameter.
INCLUDE FILES: m8260IntrCtl.h
*/
/* includes */
#include "intLib.h"
#include "iv.h"
#include "drv/intrCtl/m8260IntrCtl.h"
#ifdef INCLUDE_WINDVIEW
#include "private/funcBindP.h"
#include "private/eventP.h"
#endif /* INCLUDE_WINDVIEW */
/* local */
LOCAL INTR_HANDLER intrVecTable[IVEC_MAX+1]; /* Intr vector table */
/* SIU Interrupt Mask structure; a value for the high and low parts */
typedef struct siu_int_mask
{
UINT32 simr_h;
UINT32 simr_l;
} SIU_INT_MASK;
/*
* for a give inum, return a pair of masks, one for SIMR_H and one for SIMR_L,
* which will enable only higher priority interrupts.
*/
LOCAL SIU_INT_MASK enableHighPriInts[] =
{
{0x00000000, 0x00000000}, /* interrupt 0 error - enable nothing */
{0x003F7C06, 0xECF02658}, /* I2C */
{0x0FFF7F06, 0xECF0A7DE}, /* SPI */
{0x003F7C06, 0xECF00658}, /* RISC Timer Table */
{0x3FFF7F06, 0xECF0E7DE}, /* SMC1 */
{0x3FFF7F06, 0xECF0F7DE}, /* SMC2 */
{0x00077C06, 0xECF00050}, /* IDMA1 */
{0x001F7C06, 0xECF00450}, /* IDMA2 */
{0x00FF7E06, 0xECF0A658}, /* IDMA3 */
{0x0FFF7F06, 0xECF0A75E}, /* IDMA4 */
{0x00077C06, 0xECF00010}, /* SDMA Bus Error */
{0xFFFFFFFF, 0xFFFFFFFF}, /* interrupt 11 reserved - enable everything */
{0x00017C06, 0xECF00000}, /* Timer 1 */
{0x001F7C06, 0xECF00650}, /* Timer 2 */
{0x00FF7F06, 0xECF0A758}, /* Timer 3 */
{0x07FF7F06, 0xECF0A75C}, /* Timer 4 */
{0x00000000, 0x00000000}, /* TMCNT */
{0x00000004, 0x00000000}, /* PIT */
{0x00000000, 0x00000000}, /* interrupt 18 reserved - enable everything */
{0x00000006, 0x00000000}, /* IRQ1 XXXX */
{0x00004006, 0xEC000000}, /* IRQ2 */
{0x00006006, 0xEC000000}, /* IRQ3 */
{0x00007006, 0xEC000000}, /* IRQ4 */
{0x00007806, 0xEC000000}, /* IRQ5 */
{0x00FF7C06, 0xECF0A658}, /* IRQ6 */
{0x00FF7E06, 0xECF0A758}, /* IRQ7 */
{0xFFFFFFFF, 0xFFFFFFFF}, /* interrupt 26 reserved - enable everything */
{0x00004006, 0x00000000}, /* FCC1 */
{0x00004006, 0x80000000}, /* FCC2 */
{0x00004006, 0xC0000000}, /* FCC3 */
{0xFFFFFFFF, 0xFFFFFFFF}, /* interrupt 30 reserved - enable everything */
{0x00004006, 0xE0000000}, /* MCC1 */
{0x00004006, 0xE8000000}, /* MCC2 */
{0xFFFFFFFF, 0xFFFFFFFF}, /* interrupt 33 reserved - enable everything */
{0xFFFFFFFF, 0xFFFFFFFF}, /* interrupt 34 reserved - enable everything */
{0x00007C06, 0xEC000000}, /* SCC1 */
{0x00007C06, 0xEC800000}, /* SCC2 */
{0x00007C06, 0xECC00000}, /* SCC3 */
{0x00007C06, 0xECE00000}, /* SCC4 */
{0xFFFFFFFF, 0xFFFFFFFF}, /* interrupt 39 reserved - enable everything */
{0x00007C06, 0xECF00000}, /* PC15 */
{0x00017C06, 0xECF00010}, /* PC14 */
{0x00037C06, 0xECF00010}, /* PC13 */
{0x00077C06, 0xECF00450}, /* PC12 */
{0x000F7C06, 0xECF00450}, /* PC11 */
{0x001F7C06, 0xECF00658}, /* PC10 */
{0x003F7C06, 0xECF0A658}, /* PC9 */
{0x007F7C06, 0xECF0A658}, /* PC8 */
{0x00FF7F06, 0xECF0A75C}, /* PC7 */
{0x01FF7F06, 0xECF0A75C}, /* PC6 */
{0x03FF7F06, 0xECF0A75C}, /* PC5 */
{0x07FF7F06, 0xECF0A75E}, /* PC4 */
{0x0FFF7F06, 0xECF0E7DE}, /* PC3 */
{0x1FFF7F06, 0xECF0E7DE}, /* PC2 */
{0x3FFF7F06, 0xECF0FFDE}, /* PC1 */
{0x7FFF7F06, 0xECF0FFDE} /* PC0 */
};
LOCAL UINT32 iNumToMaskPattern[] =
{
0x00000000, /* interrupt number 0: Error */
0x00008000, /* interrupt number 1: I2C */
0x00004000, /* interrupt number 2: SPI */
0x00002000, /* interrupt number 3: Risc Timer Table */
0x00001000, /* interrupt number 4: SMC 1 */
0x00000800, /* interrupt number 5: SMC 2 */
0x00000400, /* interrupt number 6: IDMA1 */
0x00000200, /* interrupt number 7: IDMA2 */
0x00000100, /* interrupt number 8: IDMA3 */
0x00000080, /* interrupt number 9: IDMA4 */
0x00000040, /* interrupt number 10: SDMA */
0x00000000, /* interrupt number 11: reserved */
0x00000010, /* interrupt number 12: Timer 1 */
0x00000008, /* interrupt number 13: Timer 2 */
0x00000004, /* interrupt number 14: Timer 3 */
0x00000002, /* interrupt number 15: Timer 4 */
0x00000004, /* interrupt number 16: TMCNT */
0x00000002, /* interrupt number 17: PIT */
0x00000001, /* interrupt number 18: wanghy 2004/1/13 */
0x00004000, /* interrupt number 19: IRQ 1 interrupt */
0x00002000, /* interrupt number 20: IRQ 2 interrupt */
0x00001000, /* interrupt number 21: IRQ 3 interrupt */
0x00000800, /* interrupt number 22: IRQ 4 interrupt */
0x00000400, /* interrupt number 23: IRQ 5 interrupt */
0x00000200, /* interrupt number 24: IRQ 6 interrupt */
0x00000100, /* interrupt number 25: IRQ 7 interrupt */
0x00000000, /* interrupt number 26: reserved */
0x80000000, /* interrupt number 27: FCC1 */
0x40000000, /* interrupt number 28: FCC2 */
0x20000000, /* interrupt number 29: FCC3 */
0x00000000, /* interrupt number 30: reserved */
0x08000000, /* interrupt number 31: MCC1 */
0x04000000, /* interrupt number 32: MCC2 */
0x00000000, /* interrupt number 33: reserved */
0x00000000, /* interrupt number 34: reserved */
0x00800000, /* interrupt number 35: SCC1 */
0x00400000, /* interrupt number 36: SCC2 */
0x00200000, /* interrupt number 37: SCC3 */
0x00100000, /* interrupt number 38: SCC4 */
0x00000000, /* interrupt number 39: reserved */
0x00010000, /* interrupt number 40: Parallel I/O [15] */
0x00020000, /* interrupt number 41: Parallel I/O [14] */
0x00040000, /* interrupt number 42: Parallel I/O [13] */
0x00080000, /* interrupt number 43: Parallel I/O [12] */
0x00100000, /* interrupt number 44: Parallel I/O [11] */
0x00200000, /* interrupt number 45: Parallel I/O [10] */
0x00400000, /* interrupt number 46: Parallel I/O [9] */
0x00800000, /* interrupt number 47: Parallel I/O [8] */
0x01000000, /* interrupt number 48: Parallel I/O [7] */
0x02000000, /* interrupt number 49: Parallel I/O [6] */
0x04000000, /* interrupt number 50: Parallel I/O [5] */
0x08000000, /* interrupt number 51: Parallel I/O [4] */
0x10000000, /* interrupt number 52: Parallel I/O [3] */
0x20000000, /* interrupt number 53: Parallel I/O [2] */
0x40000000, /* interrupt number 54: Parallel I/O [1] */
0x80000000 /* interrupt number 55: Parallel I/O [0] */
};
/* forward declarations */
LOCAL void m8260IntrDeMux (void);
LOCAL STATUS m8260IntConnect (VOIDFUNCPTR *, VOIDFUNCPTR, int);
/*******************************************************************************
*
* m8260IntrInit - initialize the interrupt manager for the PowerPC 8260
*
* This routine connects the default demultiplexer, m8260IntrDeMux(), to the
* external interrupt vector and associates all
* interrupt sources with the default interrupt handler. This routine is
* called by sysHwInit() in sysLib.c.
*
* NOTE: All interrupt from the SIU unit are enabled, CICR is setup so
* that SCC1 has the highest relative interrupt priority, through SCC4 with the
* lowest.
*
* RETURN : OK always
*/
STATUS m8260IntrInit
(
)
{
VOIDFUNCPTR defaultVec; /* INTR3 default vector */
int vector;
UINT32 immrVal = vxImmrGet();
/* Get the default vector connected to the External Interrupt (0x500) */
defaultVec = (VOIDFUNCPTR) excVecGet ((FUNCPTR *) _EXC_OFF_INTR);
/* Connect the interrupt demultiplexer to External Interrupt (0x500) */
excIntConnect ((VOIDFUNCPTR *) _EXC_OFF_INTR, m8260IntrDeMux);
/* Install `system' intConnect routine */
if (_func_intConnectRtn == NULL)
_func_intConnectRtn = m8260IntConnect;
if (_func_intEnableRtn == NULL)
_func_intEnableRtn = m8260IntEnable;
if (_func_intDisableRtn == NULL)
_func_intDisableRtn = m8260IntDisable;
/* Set all vectors to default handler */
for (vector = 0; vector <= IVEC_MAX; vector++)
intConnect (INUM_TO_IVEC(vector), (VOIDFUNCPTR) defaultVec, 0);
/* disable all interrupts */
*M8260_SIMR_L(immrVal) = 0x00000000;
*M8260_SIMR_H(immrVal) = 0x00000000;
return (OK);
}
/*******************************************************************************
*
* m8260IntConnect - connect a routine to an interrupt
*
* This routine connects any C or assembly routine to one of the multiple
* sources of interrupts.
*
* The connected routine can be any normal C code, except that it must not
* invoke certain operating system functions that may block or perform I/O
* operations.
*
* types are defined in h/drv/intrClt/m8260Intr.h.
*
* RETURNS: OK, or ERROR if is unknown.
*
* SEE ALSO: m8260Intr.h
*/
LOCAL STATUS m8260IntConnect
(
VOIDFUNCPTR * vector, /* interrupt vector to attach to */
VOIDFUNCPTR routine, /* routine to be called */
int parameter /* parameter to be passed to routine */
)
{
/* test the vector */
if ((int)(vector) > INUM_MAX)
return (ERROR);
intrVecTable[(int)(vector)].vec = routine;
intrVecTable[(int)(vector)].arg = parameter;
return (OK);
}
/*******************************************************************************
*
* m8260IntrDeMux - SIU interrupt demultiplexer
*
* This routine must be bound to external interrupt exception (vector 0x500).
* It is used to call the appropriate handler with its argument when an
* interrupt occurs.
*
* The interrupts are prioritized in the following order:
*
* NOTE: when this function is called the interrupts are still locked. It's
* this function responsability to unlock the interrupt.
*
* RETURNS: N/A
*/
void m8260IntrDeMux (void)
{
VINT32 intVec; /* interrupt vector */
UINT32 oldIntMask_L; /* current interrupt mask */
UINT32 oldIntMask_H; /* current interrupt mask */
UINT32 immrVal = vxImmrGet();
/* read the interrupt vector register */
while(1)
{
intVec = (0x0000003f & ((* M8260_SIVEC(immrVal)) >> 26));
if(!intVec)
{
break;
}
#ifdef INCLUDE_WINDVIEW
WV_EVT_INT_ENT(intVec)
#endif /* INCLUDE_WINDVIEW */
/* save the current interrupt mask */
oldIntMask_L = * M8260_SIMR_L(immrVal);
oldIntMask_H = * M8260_SIMR_H(immrVal);
/* enable only the higher priority interrupts */
* M8260_SIMR_L(immrVal)&=
enableHighPriInts[IVEC_TO_INUM((VOIDFUNCPTR *)intVec)].simr_l;
* M8260_SIMR_H(immrVal)&=
enableHighPriInts[IVEC_TO_INUM((VOIDFUNCPTR *)intVec)].simr_h;
/* unlock the interrupt */
intUnlock (_PPC_MSR_EE);
/* call the Interrupt Handler */
/* table is indexed by vector */
intrVecTable[intVec].vec (intrVecTable[intVec].arg);
/* restore the interrupt mask */
intLock();
* M8260_SIMR_L(immrVal) = oldIntMask_L;
* M8260_SIMR_H(immrVal) = oldIntMask_H;
}
return;
}
/*******************************************************************************
*
* m8260IntEnable - enable the indicated interrupt
*
* This routine will enable the indicated interrupt by setting the appropriate
* bit in the SIU Interrupt Mask Registers.
*
* The design of the 8260 presents the following design requirements:
*
* 1. the mapping from interrupt number to mask bit can not be represented by
* a function. An array, indexed by interrupt number (INUM), is used to map
* the interrupt number to the appropriate mask.
*
* 2. There are two 32 bit mask registers (SIMR_L and SIMR_H). The interrupt
* number must be compared to 4 ranges to determine which register contains
* its mask bit:
*
* .CS
* interrupt number
* in m8260IntrCtl.h register
* ---------------- -------
* 0-15 SIMR_L
* 16-31 SIMR_H
* 32-47 SIMR_L
* 48-63 SIMR_H
* .CE
*
* RETURNS: 0, always.
*/
int m8260IntEnable
(
int intNum /* interrupt level to enable */
)
{
UINT32 immrVal = vxImmrGet();
if ((intNum > 0) && (intNum <= 55))
{
if (((intNum >= 0) && (intNum <= 15)) ||
((intNum >= 27) && (intNum <= 38)))
*M8260_SIMR_L(immrVal) |= iNumToMaskPattern[intNum];
else
*M8260_SIMR_H(immrVal) |= iNumToMaskPattern[intNum];
}
return 0;
}
/*******************************************************************************
*
* m8260IntDisable - Disable one of the Level or IRQ interrupts into the SIU
*
* This routine will mask the bit in the SIMASK register corresponding to
* the requested interrupt level.
*
* RETURNS: 0, always.
*/
int m8260IntDisable
(
int intNum /* interrupt level to disable */
)
{
UINT32 immrVal = vxImmrGet();
if ((intNum >= 0) && (intNum <= INUM_MAX))
if (((intNum >= 0) && (intNum <= 15)) ||
((intNum >= 27) && (intNum <= 38)))
*M8260_SIMR_L(immrVal) &= ~iNumToMaskPattern[intNum];
else
*M8260_SIMR_H(immrVal) &= ~iNumToMaskPattern[intNum];
return 0;
}
VOIDFUNCPTR * m8260InumToIvec
(
int intNum
)
{
if (intNum <0) /* error */
return ((VOIDFUNCPTR *) 0);
else if (intNum <= 25)
return ((VOIDFUNCPTR *) intNum);
else if (intNum == 26) /* error */
return ((VOIDFUNCPTR *) 0);
else if (intNum <= 38)
return ((VOIDFUNCPTR *) (intNum + 5));
else if (intNum == 39) /* error */
return ((VOIDFUNCPTR *) 0);
else if (intNum <= 55)
return ((VOIDFUNCPTR *) (intNum + 8));
else /* error */
return ((VOIDFUNCPTR *) 0);
}
/*******************************************************************************
*
* m8260IvecToInum - get the relevant interrupt number
*
* This routine finds out the interrupt number associated with the vector
* in .
*
* types are defined in h/drv/intrClt/m8260Intr.h.
*
* RETURNS: the interrupt number for the vector
*
* SEE ALSO: m8260Intr.h
*/
int m8260IvecToInum
(
VOIDFUNCPTR * vector /* interrupt vector to attach to */
)
{
/* test the vector */
if ((int) (vector) <= 0)
return ((int ) 0);
else if ((int) vector < INUM_RESERVED26)
return ((int) vector);
else if ((int) vector < 32)
return (INUM_RESERVED26);
else if ((int) vector < 44)
return ((int) vector - 5);
else if ((int) vector < 48)
return ((int) INUM_RESERVED39);
else if ((int) vector <= IVEC_MAX)
return ((int) vector - 8);
else
return (0);
}