exceptions.h File Reference

Handles System Exceptions. More...

#include <stdint.h>

Go to the source code of this file.

Classes
struct	exception_context_t
	Pointer to the stack frame of the saved context during interrupts. More...

Macros
#define	EXCEPTION_IRQ_COUNT   15
	Number of IRQ bits on the system.
#define	EXCEPTION_PPC_IRQ   (*(volatile uint32_t*)0xcd000030)
	Access to Holywoods Interrupt Controller Flags.
#define	EXCEPTION_PPC_IRQ_MASK   (*(volatile uint32_t*)0xcd000034)

Typedefs
typedef void(*	exception_irq_handler_t) (exception_irq_type_t irq)
	Function pointer to handle irq exceptions.

Enumerations
enum	exception_irq_type_t {   EXCEPTION_IRQ_TYPE_GP_RUNTIME , EXCEPTION_IRQ_TYPE_RESET_SWITCH , EXCEPTION_IRQ_TYPE_DVD , EXCEPTION_IRQ_TYPE_SERIAL ,   EXCEPTION_IRQ_TYPE_EXI , EXCEPTION_IRQ_TYPE_STREAMING , EXCEPTION_IRQ_TYPE_DSP , EXCEPTION_IRQ_TYPE_MEMORY ,   EXCEPTION_IRQ_TYPE_VIDEO , EXCEPTION_IRQ_TYPE_PE_TOKEN , EXCEPTION_IRQ_TYPE_PE_FINISH , EXCEPTION_IRQ_TYPE_FIFO ,   EXCEPTION_IRQ_TYPE_DEBUGGER , EXCEPTION_IRQ_TYPE_HSP , EXCEPTION_IRQ_TYPE_IPC }
	Types of IRQs during external exceptions. More...

Functions
void	exceptions_install_vector ()
	Installs the exception vector into the CPU.
void	exceptions_install_irq (exception_irq_handler_t handler, exception_irq_type_t type)
	Registers an interrupt handler for an IRQ.
void	exception_reset (exception_context_t *context)
void	exception_machine_check (exception_context_t *context)
void	exception_dsi (exception_context_t *context)
void	exception_isi (exception_context_t *context)
void	exception_external (exception_context_t *context)
void	exception_alignment (exception_context_t *context)
void	exception_program (exception_context_t *context)
void	exception_fpu_unavailable (exception_context_t *context)
void	exception_decrementer (exception_context_t *context)
void	exception_syscall (exception_context_t *context)
void	exceptions_start_first_task ()

Variables
int32_t	exception_isr_context_switch_needed
	Call the context switch at the end of the ISR if true.

Detailed Description

Handles System Exceptions.

Handles system exceptions interrupt vector table. This includes interrupts. (asynchronous exceptions)

Author

Samuel Fitzsimons (rainbain)

Date

2025 @license MIT (see LICENSE file)

Macro Definition Documentation

EXCEPTION_IRQ_COUNT

#define EXCEPTION_IRQ_COUNT   15

Number of IRQ bits on the system.

Number of IRQ bits on the system.

EXCEPTION_PPC_IRQ

#define EXCEPTION_PPC_IRQ   (*(volatile uint32_t*)0xcd000030)

Access to Holywoods Interrupt Controller Flags.

There appears to be another interrupt controller inside of hollywood added on the Wii.

This is needed for acknowledging interrupts through it.

Typedef Documentation

exception_irq_handler_t

typedef void(* exception_irq_handler_t) (exception_irq_type_t irq)

Function pointer to handle irq exceptions.

Function pointer to handle irq exceptions. Use exceptions_install_irq to set it.

Parameters

irq	The IRQ type its handling.

Enumeration Type Documentation

exception_irq_type_t

enum exception_irq_type_t

Types of IRQs during external exceptions.

Types of IRQs during external exceptions retrievd from the processor interface. Also used to enable/disable interrupts.

Function Documentation

exceptions_install_irq()

void exceptions_install_irq ( exception_irq_handler_t handler, exception_irq_type_t type )

extern

Registers an interrupt handler for an IRQ.

Registers an interrupt handler using a IRQ type

exceptions_install_vector()

void exceptions_install_vector ( )

extern

Installs the exception vector into the CPU.

Installs the exception vector into the CPU. Called during system_initialize as part of start.s.

Assumes interrupts to be disabled when you do this.

Variable Documentation

exception_isr_context_switch_needed

int32_t exception_isr_context_switch_needed

extern

Call the context switch at the end of the ISR if true.

Call the context switch at the end of the ISR if true. Usually used along side xSemaphoreGiveFromISR such that awoken task are switched into when a ISR wakes a task.