Interrupt and exception handling. More...

#include <kos/irq.h>
#include <stdalign.h>
#include <stdbool.h>
#include <stdint.h>
#include <kos/cdefs.h>

Data Structures
struct	irq_context_t
	Architecture-specific structure for holding the processor state. More...

Macros
#define	REG_BYTE_CNT 256
	The number of bytes required to save thread context.

#define	IRQ_TRAP_CODE(code)

#define	IRQ_PRIO_MAX 15
	Minimum/maximum values for IRQ priorities.

#define	IRQ_PRIO_MIN 1

#define	IRQ_PRIO_MASKED 0

Register Accessors
Convenience macros for accessing context registers
#define	CONTEXT_PC(c)
	Fetch the program counter from an irq_context_t.

#define	CONTEXT_FP(c)
	Fetch the frame pointer from an irq_context_t.

#define	CONTEXT_SP(c)
	Fetch the stack pointer from an irq_context_t.

#define	CONTEXT_RET(c)
	Fetch the return value from an irq_context_t.

Enumerations
enum	irq_exception { EXC_RESET_POWERON = 0x0000 , EXC_RESET_MANUAL = 0x0020 , EXC_RESET_UDI = 0x0000 , EXC_ITLB_MULTIPLE = 0x0140 , EXC_DTLB_MULTIPLE = 0x0140 , EXC_USER_BREAK_PRE = 0x01e0 , EXC_INSTR_ADDRESS = 0x00e0 , EXC_ITLB_MISS = 0x0040 , EXC_ITLB_PV = 0x00a0 , EXC_ILLEGAL_INSTR = 0x0180 , EXC_SLOT_ILLEGAL_INSTR = 0x01a0 , EXC_GENERAL_FPU = 0x0800 , EXC_SLOT_FPU = 0x0820 , EXC_DATA_ADDRESS_READ = 0x00e0 , EXC_DATA_ADDRESS_WRITE = 0x0100 , EXC_DTLB_MISS_READ = 0x0040 , EXC_DTLB_MISS_WRITE = 0x0060 , EXC_DTLB_PV_READ = 0x00a0 , EXC_DTLB_PV_WRITE = 0x00c0 , EXC_FPU = 0x0120 , EXC_INITIAL_PAGE_WRITE = 0x0080 , EXC_TRAPA = 0x0160 , EXC_USER_BREAK_POST = 0x01e0 , EXC_NMI = 0x01c0 , EXC_IRQ0 = 0x0200 , EXC_IRQ1 = 0x0220 , EXC_IRQ2 = 0x0240 , EXC_IRQ3 = 0x0260 , EXC_IRQ4 = 0x0280 , EXC_IRQ5 = 0x02a0 , EXC_IRQ6 = 0x02c0 , EXC_IRQ7 = 0x02e0 , EXC_IRQ8 = 0x0300 , EXC_IRQ9 = 0x0320 , EXC_IRQA = 0x0340 , EXC_IRQB = 0x0360 , EXC_IRQC = 0x0380 , EXC_IRQD = 0x03a0 , EXC_IRQE = 0x03c0 , EXC_TMU0_TUNI0 = 0x0400 , EXC_TMU1_TUNI1 = 0x0420 , EXC_TMU2_TUNI2 = 0x0440 , EXC_TMU2_TICPI2 = 0x0460 , EXC_RTC_ATI = 0x0480 , EXC_RTC_PRI = 0x04a0 , EXC_RTC_CUI = 0x04c0 , EXC_SCI_ERI = 0x04e0 , EXC_SCI_RXI = 0x0500 , EXC_SCI_TXI = 0x0520 , EXC_SCI_TEI = 0x0540 , EXC_WDT_ITI = 0x0560 , EXC_REF_RCMI = 0x0580 , EXC_REF_ROVI = 0x05a0 , EXC_UDI = 0x0600 , EXC_GPIO_GPIOI = 0x0620 , EXC_DMAC_DMTE0 = 0x0640 , EXC_DMAC_DMTE1 = 0x0660 , EXC_DMAC_DMTE2 = 0x0680 , EXC_DMAC_DMTE3 = 0x06a0 , EXC_DMA_DMAE = 0x06c0 , EXC_SCIF_ERI = 0x0700 , EXC_SCIF_RXI = 0x0720 , EXC_SCIF_BRI = 0x0740 , EXC_SCIF_TXI = 0x0760 , EXC_DOUBLE_FAULT = 0x0780 , EXC_UNHANDLED_EXC = 0x07e0 , EXC_TRAP = 0x0800 }
	Interrupt exception codes. More...

enum	irq_src_t { IRQ_SRC_RTC , IRQ_SRC_TMU2 , IRQ_SRC_TMU1 , IRQ_SRC_TMU0 , _IRQ_SRC_RESV , IRQ_SRC_SCI1 , IRQ_SRC_REF , IRQ_SRC_WDT , IRQ_SRC_HUDI , IRQ_SRC_SCIF , IRQ_SRC_DMAC , IRQ_SRC_GPIO , IRQ_SRC_IRL3 , IRQ_SRC_IRL2 , IRQ_SRC_IRL1 , IRQ_SRC_IRL0 }
	Interrupt sources. More...

Functions
static int	arch_irq_inside_int (void)

static void	arch_irq_restore (irq_mask_t old)

static irq_mask_t	arch_irq_disable (void)

static void	arch_irq_enable (void)

void	arch_irq_create_context (irq_context_t context, uintptr_t stack_pointer, uintptr_t routine, const uintptr_t args)

int	arch_irq_set_handler (irq_t code, irq_hdl_t hnd, void *data)

irq_cb_t	arch_irq_get_handler (irq_t code)

int	arch_irq_set_global_handler (irq_hdl_t hnd, void *data)

irq_cb_t	arch_irq_get_global_handler (void)

void	arch_irq_set_context (irq_context_t *cxt)

irq_context_t *	arch_irq_get_context (void)

void	irq_set_priority (irq_src_t src, unsigned int prio)
	Set the priority of a given IRQ source.

unsigned int	irq_get_priority (irq_src_t src)
	Get the priority of a given IRQ source.

Variables
int	inside_int

Detailed Description

Interrupt and exception handling.

This file contains various definitions and declarations related to handling interrupts and exceptions on the Dreamcast. This level deals with IRQs and exceptions generated on the SH4, versus the asic layer which deals with actually differentiating "external" interrupts.

Author: Megan Potter; Paul Cercueil; Falco Girgis

See also: dc/asic.h

Data Structures

Macros

Enumerations

Functions

Variables

Detailed Description