irq.c File Reference

#include <stdlib.h>
#include <string.h>
#include "asm.h"
#include "cache.h"
#include "context.h"
#include "processor.h"
#include "lwp_threads.h"
#include "irq.h"
#include "console.h"

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Classes
struct	irq_handler_s

Macros
#define	CPU_STACK_ALIGNMENT   8
#define	CPU_MINIMUM_STACK_FRAME_SIZE   16
#define	_SHIFTL(v, s, w)   ((u32) (((u32)(v) & ((0x01 << (w)) - 1)) << (s)))
#define	_SHIFTR(v, s, w)   ((u32)(((u32)(v) >> (s)) & ((0x01 << (w)) - 1)))

Functions
void	__exception_load (u32, void *, u32, void *)
void	c_irqdispatcher (frame_context *ctx)
static u32	__SetInterrupts (u32 iMask, u32 nMask)
void	__UnmaskIrq (u32 nMask)
void	__MaskIrq (u32 nMask)
void	__irq_init ()
raw_irq_handler_t	IRQ_Request (u32 nIrq, raw_irq_handler_t pHndl, void *pCtx)
	Register an interrupt handler. More...
raw_irq_handler_t	IRQ_GetHandler (u32 nIrq)
	Get the handler from interrupt number. More...
raw_irq_handler_t	IRQ_Free (u32 nIrq)
	Free an interrupt handler. More...
u32	IRQ_Disable ()
	Disable the complete IRQ subsystem. No interrupts will be served. Multithreading kernel fully disabled. More...
void	IRQ_Restore (u32 level)
	Restore the IRQ subsystem with the given level. This is function should be used together with IRQ_Disable() More...

Variables
struct irq_handler_s	__attribute__
static u64	spuriousIrq = 0
static u32	prevIrqMask = 0
static u32	currIrqMask = 0
static struct irq_handler_s	g_IRQHandler [32]
static vu32 *const	_piReg = (u32*)0xCC003000
static vu16 *const	_memReg = (u16*)0xCC004000
static vu16 *const	_dspReg = (u16*)0xCC005000
static u32 const	_irqPrio []
s8	irqhandler_start []
s8	irqhandler_end []
u8	__intrstack_addr []
u8	__intrstack_end []
	return

Macro Definition Documentation

_SHIFTL

#define _SHIFTL	(		v,
			s,
			w
	)		((u32) (((u32)(v) & ((0x01 << (w)) - 1)) << (s)))

_SHIFTR

#define _SHIFTR	(		v,
			s,
			w
	)		((u32)(((u32)(v) >> (s)) & ((0x01 << (w)) - 1)))

CPU_MINIMUM_STACK_FRAME_SIZE

#define CPU_MINIMUM_STACK_FRAME_SIZE   16

CPU_STACK_ALIGNMENT

#define CPU_STACK_ALIGNMENT   8

Function Documentation

__exception_load()

void __exception_load	(	u32	,
		void *	,
		u32	,
		void *
	)

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__irq_init()

void __irq_init

(

void

)

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__MaskIrq()

void __MaskIrq

(

u32

nMask

)

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__SetInterrupts()

static u32 __SetInterrupts ( u32  iMask, u32  nMask  )

static

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__UnmaskIrq()

void __UnmaskIrq

(

u32

nMask

)

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c_irqdispatcher()

void c_irqdispatcher

(

frame_context *

ctx

)

IRQ_Disable()

u32 IRQ_Disable

(

void

)

Disable the complete IRQ subsystem. No interrupts will be served. Multithreading kernel fully disabled.

Returns

Old state of the IRQ subsystem

IRQ_Free()

raw_irq_handler_t IRQ_Free

(

u32

nIrq

)

Free an interrupt handler.

Parameters

[in]

nIrq

interrupt number for which to free the handler

Returns

Old interrupt handler, else NULL

IRQ_GetHandler()

raw_irq_handler_t IRQ_GetHandler

(

u32

nIrq

)

Get the handler from interrupt number.

Parameters

[in]

nIrq

interrupt number for which to retrieve the handler

Returns

interrupt handler, else NULL

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IRQ_Request()

raw_irq_handler_t IRQ_Request	(	u32	nIrq,
		raw_irq_handler_t	pHndl,
		void *	pCtx
	)

Register an interrupt handler.

Parameters

[in]	nIrq	interrupt number to which to register the handler
[in]	pHndl	pointer to the handler callback function which to call when interrupt has triggered
[in]	pCtx	pointer to user data to pass with, when handler is called

Returns

Old interrupt handler, else NULL

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IRQ_Restore()

void IRQ_Restore

(

u32

level

)

Restore the IRQ subsystem with the given level. This is function should be used together with IRQ_Disable()

Parameters

[in]

level

IRQ level to restore to.

Returns

none

Variable Documentation

__attribute__

struct irq_handler_s __attribute__

__intrstack_addr

u8 __intrstack_addr[]

__intrstack_end

u8 __intrstack_end[]

_dspReg

vu16* const _dspReg = (u16*)0xCC005000

static

_irqPrio

u32 const _irqPrio[]

static

Initial value:

= {IM_PI_ERROR,IM_PI_DEBUG,IM_MEM,IM_PI_RSW,
                               IM_PI_VI,(IM_PI_PETOKEN|IM_PI_PEFINISH),
                               IM_PI_HSP,
                               (IM_DSP_ARAM|IM_DSP_DSP|IM_AI|IM_EXI|IM_PI_SI|IM_PI_DI),
                               IM_DSP_AI,IM_PI_CP,



                               0xffffffff}

_memReg

vu16* const _memReg = (u16*)0xCC004000

static

_piReg

vu32* const _piReg = (u32*)0xCC003000

static

currIrqMask

u32 currIrqMask = 0

static

g_IRQHandler

struct irq_handler_s g_IRQHandler[32]

static

irqhandler_end

s8 irqhandler_end[]

irqhandler_start

s8 irqhandler_start[]

prevIrqMask

u32 prevIrqMask = 0

static

return

return

spuriousIrq

u64 spuriousIrq = 0

static