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Ignore whitespace Rev 2244 → Rev 2245

/branches/arm/kernel/arch/arm32/src/drivers/gxemul.c
1,5 → 1,5
/*
* Copyright (c) 2005-2007 Ondrej Palkovsky, Michal Kebrt
* Copyright (c) 2005-2007 Ondrej Palkovsky, Michal Kebrt, Petr Stepan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
39,14 → 39,25
#include <console/console.h>
#include <sysinfo/sysinfo.h>
#include <print.h>
#include <ddi/device.h>
 
/** Address of devices. */
#define GXEMUL_VIDEORAM 0x10000000
#define GXEMUL_KBD_ADDRESS 0x10000000
#define GXEMUL_KBD_IRQ 0
#define GXEMUL_RTC 0x15000000
#define GXEMUL_RTC_FREQ 0x15000100
#define GXEMUL_RTC_ACK 0x15000110
#define GXEMUL_IRQC 0x16000000
#define GXEMUL_IRQC_MASK 0x16000004
#define GXEMUL_IRQC_UNMASK 0x16000008
 
/** IRQs */
#define GXEMUL_KBD_IRQ 2
#define GXEMUL_TIMER_IRQ 4
 
static chardev_t console;
static irq_t gxemul_irq;
static irq_t gxemul_timer_irq;
 
static void gxemul_write(chardev_t *dev, const char ch);
static void gxemul_enable(chardev_t *dev);
70,6 → 81,7
void gxemul_enable(chardev_t *dev)
{
// cp0_unmask_int(GXEMUL_KBD_IRQ);
gxemul_irqc_unmask(GXEMUL_KBD_IRQ);
}
 
/* Called from getc(). */
76,6 → 88,7
void gxemul_disable(chardev_t *dev)
{
// cp0_mask_int(GXEMUL_KBD_IRQ);
gxemul_irqc_mask(GXEMUL_KBD_IRQ);
}
 
/** Read character using polling, assume interrupts disabled */
108,7 → 121,8
ch = '\n';
if (ch == 0x7f)
ch = '\b';
chardev_push_character(&console, ch);
//chardev_push_character(&console, ch);
printf("%c", ch);
}
}
 
137,7 → 151,7
}
 
 
/* Return console object representing msim console */
/** Return console object representing msim console */
void gxemul_console(devno_t devno)
{
chardev_initialize("msim_console", &console, &gxemul_ops);
152,6 → 166,7
irq_register(&gxemul_irq);
// cp0_unmask_int(GXEMUL_KBD_IRQ);
gxemul_irqc_unmask(GXEMUL_KBD_IRQ);
sysinfo_set_item_val("kbd", NULL, true);
sysinfo_set_item_val("kbd.devno", NULL, devno);
159,5 → 174,87
sysinfo_set_item_val("kbd.address.virtual", NULL, GXEMUL_KBD_ADDRESS);
}
 
/** Return the mask of active interrupts. */
inline uint32_t gxemul_irqc_get_sources(void)
{
return *(uint32_t*) GXEMUL_IRQC;
}
 
/** Masks interrupt.
*
* @param irq interrupt number
*/
inline void gxemul_irqc_mask(uint32_t irq)
{
*(uint32_t*) GXEMUL_IRQC_MASK = irq;
}
 
/** Unmasks interrupt.
*
* @param irq interrupt number
*/
inline void gxemul_irqc_unmask(uint32_t irq)
{
*(uint32_t*) GXEMUL_IRQC_UNMASK = irq;
}
 
 
/** Starts gxemul Real Time Clock device, which asserts regular interrupts.
*
* @param frequency interrupts frequency (0 disables RTC)
*/
void gxemul_timer_start(uint32_t frequency)
{
*(uint32_t*) GXEMUL_RTC_FREQ = frequency;
}
 
static irq_ownership_t gxemul_timer_claim(void)
{
return IRQ_ACCEPT;
}
 
static void gxemul_timer_irq_handler(irq_t *irq, void *arg, ...)
{
/* TODO time drifts ??
unsigned long drift;
 
drift = cp0_count_read() - nextcount;
while (drift > cp0_compare_value) {
drift -= cp0_compare_value;
CPU->missed_clock_ticks++;
}
nextcount = cp0_count_read() + cp0_compare_value - drift;
cp0_compare_write(nextcount);
*/
 
/*
* We are holding a lock which prevents preemption.
* Release the lock, call clock() and reacquire the lock again.
*/
spinlock_unlock(&irq->lock);
//clock();
puts(" ");
spinlock_lock(&irq->lock);
/* TODO what's that? *
if (virtual_timer_fnc != NULL)
virtual_timer_fnc();
*/
}
 
/**
* Initializes and registers timer interrupt handler.
*/
void gxemul_timer_irq_init()
{
irq_initialize(&gxemul_timer_irq);
gxemul_timer_irq.devno = device_assign_devno();
gxemul_timer_irq.inr = GXEMUL_TIMER_IRQ;
gxemul_timer_irq.claim = gxemul_timer_claim;
gxemul_timer_irq.handler = gxemul_timer_irq_handler;
irq_register(&gxemul_timer_irq);
}
 
 
/** @}
*/