140 lines
2.6 KiB
C
140 lines
2.6 KiB
C
#ifndef _INTERNALS_GINT_H
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#define _INTERNALS_GINT_H
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#include <stdint.h>
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#include <mpu.h>
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#include <gint.h>
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//---
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// Interrupt handlers.
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//---
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// General exception handler.
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void gint_exc(void);
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// TLB miss handler.
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void gint_tlb(void);
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// Interrupt handler.
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void gint_int(void);
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//---
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// Assembler-level VBR management.
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//---
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/*
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gint_getvbr()
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Retrieves the current VBR address.
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*/
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uint32_t gint_getvbr(void);
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/*
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gint_setvbr()
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Sets the VBR address and calls the configuration function while
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interrupts are disabled.
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*/
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void gint_setvbr(uint32_t vbr, void (*setup)(void));
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//---
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// Initialization and termination routines, environment saves.
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//---
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/*
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gint_init()
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Initializes gint. Loads the interrupt handler into the memory and sets
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the new vbr address.
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*/
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void gint_init(mpu_t mpu);
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/*
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gint_quit()
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Stops gint. Restores the system's configuration and vbr address.
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*/
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void gint_quit(void);
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#include <modules/rtc.h>
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#include <modules/timer.h>
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/*
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environment_t
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Structure where all registers used by gint are saved by default to
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ensure that the operating system is not disturbed.
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*/
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typedef struct
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{
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// Interrupt controller.
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uint16_t IPR[8];
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// Real-Time Clock.
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uint8_t RCR1, RCR2;
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// Timer Unit.
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mod_tmu_timer_t TMU0, TMU1, TMU2;
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uint8_t TSTR;
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// I/O ports for the keyboard driver.
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uint16_t PACR, PBCR, PMCR;
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uint8_t PADR, PBDR, PMDR;
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} environment_7705_t;
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typedef struct
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{
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// Interrupt controller.
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uint16_t IPR[12];
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// Real-Time Clock.
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uint8_t RCR1, RCR2;
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// Timer Unit.
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mod_tmu_timer_t TMU0, TMU1, TMU2;
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uint8_t TSTR;
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// I/O ports for the keyboard driver.
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uint16_t PMCR, PNCR, PZCR;
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uint8_t PMDR, PNDR, PZDR;
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uint8_t key;
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} environment_7305_t;
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typedef union
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{
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environment_7705_t env_7705;
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environment_7305_t env_7305;
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} environment_t;
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/*
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gint_save()
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Saves many registers into an internal environment buffer.
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*/
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void gint_save_7705(environment_7705_t *env);
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void gint_save_7305(environment_7305_t *env);
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/*
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gint_lock_and_setup()
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Locks all interrupts (ie. disables them by default) and sets initial
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values to all registers, allows specific interrupts, etc.
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*/
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void gint_lock_and_setup_7705(void);
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void gint_lock_and_setup_7305(void);
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/*
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gint_restore_and_unlock()
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Restores the parameters saved in the environment buffer to give back
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the interrupt control to the system.
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*/
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void gint_restore_and_unlock_7705(environment_7705_t *env);
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void gint_restore_and_unlock_7305(environment_7305_t *env);
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/*
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gint_reg()
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Returns the address of a platform-shared register.
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*/
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volatile void *gint_reg_7705(gint_register_t reg);
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volatile void *gint_reg_7305(gint_register_t reg);
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#endif // _INTERNALS_GINT_H
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