WebSVN – HelenOS – Diff – /branches/arm/kernel/arch/arm32/src/drivers/gxemul.c

 /*
- * 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
  * modification, are permitted provided that the following conditions
  * are met:
 #include <console/chardev.h>
 #include <arch/drivers/gxemul.h>
 #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_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      0
+#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);
 static void gxemul_disable(chardev_t *dev);
 static char gxemul_do_read(chardev_t *dev);
 /* Called from getc(). */
 void gxemul_enable(chardev_t *dev)
+{
 //  cp0_unmask_int(GXEMUL_KBD_IRQ);
+    gxemul_irqc_unmask(GXEMUL_KBD_IRQ);
+}
 /* Called from getc(). */
 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 */
 static char gxemul_do_read(chardev_t *dev)
+{
             ch = *((char *) GXEMUL_KBD_ADDRESS);
             if (ch =='\r')
                 ch = '\n';
             if (ch == 0x7f)
                 ch = '\b';
-            chardev_push_character(&console, ch);
+            //chardev_push_character(&console, ch);
+            printf("%c", ch);
+    }
+}
 static irq_ownership_t gxemul_claim(void)
+{
     spinlock_unlock(&gxemul_irq.lock);
     interrupts_restore(ipl);
+}
-/* 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);
     stdin = &console;
     stdout = &console;
     gxemul_irq.claim = gxemul_claim;
     gxemul_irq.handler = gxemul_irq_handler;
     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);
     sysinfo_set_item_val("kbd.inr", NULL, GXEMUL_KBD_IRQ);
     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);
+}
 /** @}
  */

Subversion Repositories HelenOS

(root)/branches/arm/kernel/arch/arm32/src/drivers/gxemul.c – Rev 2215 → 2245