/*
* Copyright (c) 2005 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup ia64
* @{
*/
/** @file
*/
#include <arch/ski/ski.h>
#include <console/console.h>
#include <console/chardev.h>
#include <arch/interrupt.h>
#include <sysinfo/sysinfo.h>
#include <arch/types.h>
#include <ddi/device.h>
#include <ddi/irq.h>
#include <ipc/irq.h>
#include <proc/thread.h>
#include <synch/spinlock.h>
#include <arch/asm.h>
#define SKI_KBD_INR 0
static irq_t ski_kbd_irq;
static devno_t ski_kbd_devno;
chardev_t ski_console;
chardev_t ski_uconsole;
static bool kbd_disabled;
static void ski_putchar(chardev_t *d, const char ch);
static int32_t ski_getchar(void);
/** Display character on debug console
*
* Use SSC (Simulator System Call) to
* display character on debug console.
*
* @param d Character device.
* @param ch Character to be printed.
*/
void ski_putchar(chardev_t *d, const char ch)
{
asm volatile (
"mov r15 = %0\n"
"mov r32 = %1\n" /* r32 is in0 */
"break 0x80000\n" /* modifies r8 */
:
: "i" (SKI_PUTCHAR), "r" (ch)
: "r15", "in0", "r8"
);
if (ch == '\n')
ski_putchar(d, '\r');
}
/** Ask debug console if a key was pressed.
*
* Use SSC (Simulator System Call) to
* get character from debug console.
*
* This call is non-blocking.
*
* @return ASCII code of pressed key or 0 if no key pressed.
*/
int32_t ski_getchar(void)
{
uint64_t ch;
asm volatile (
"mov r15 = %1\n"
"break 0x80000;;\n" /* modifies r8 */
"mov %0 = r8;;\n"
: "=r" (ch)
: "i" (SKI_GETCHAR)
: "r15", "r8"
);
return (int32_t) ch;
}
/**
* This is a blocking wrapper for ski_getchar().
* To be used when the kernel crashes.
*/
static char ski_getchar_blocking(chardev_t *d)
{
int ch;
while(!(ch = ski_getchar()))
;
if(ch == '\r')
ch = '\n';
return (char) ch;
}
/** Ask keyboard if a key was pressed. */
static void poll_keyboard(void)
{
char ch;
static char last;
ipl_t ipl;
ipl = interrupts_disable();
if (kbd_disabled) {
interrupts_restore(ipl);
return;
}
spinlock_lock(&ski_kbd_irq.lock);
ch = ski_getchar();
if(ch == '\r')
ch = '\n';
if (ch) {
if (ski_kbd_irq.notif_cfg.notify && ski_kbd_irq.notif_cfg.answerbox) {
chardev_push_character(&ski_uconsole, ch);
ipc_irq_send_notif(&ski_kbd_irq);
} else {
chardev_push_character(&ski_console, ch);
}
last = ch;
spinlock_unlock(&ski_kbd_irq.lock);
interrupts_restore(ipl);
return;
}
if (last) {
if (ski_kbd_irq.notif_cfg.notify && ski_kbd_irq.notif_cfg.answerbox) {
chardev_push_character(&ski_uconsole, 0);
ipc_irq_send_notif(&ski_kbd_irq);
}
last = 0;
}
spinlock_unlock(&ski_kbd_irq.lock);
interrupts_restore(ipl);
}
/* Called from getc(). */
static void ski_kbd_enable(chardev_t *d)
{
kbd_disabled = false;
}
/* Called from getc(). */
static void ski_kbd_disable(chardev_t *d)
{
kbd_disabled = true;
}
/** Decline to service hardware IRQ.
*
* This is only a virtual IRQ, so always decline.
*
* @return Always IRQ_DECLINE.
*/
static irq_ownership_t ski_kbd_claim(void)
{
return IRQ_DECLINE;
}
static chardev_operations_t ski_ops = {
.resume = ski_kbd_enable,
.suspend = ski_kbd_disable,
.write = ski_putchar,
.read = ski_getchar_blocking
};
/** Initialize debug console
*
* Issue SSC (Simulator System Call) to
* to open debug console.
*/
void ski_init_console(void)
{
asm volatile (
"mov r15 = %0\n"
"break 0x80000\n"
:
: "i" (SKI_INIT_CONSOLE)
: "r15", "r8"
);
chardev_initialize("ski_console", &ski_console, &ski_ops);
chardev_initialize("ski_uconsole", &ski_uconsole, &ski_ops);
stdin = &ski_console;
stdout = &ski_console;
ski_kbd_devno = device_assign_devno();
irq_initialize(&ski_kbd_irq);
ski_kbd_irq.inr = SKI_KBD_INR;
ski_kbd_irq.devno = ski_kbd_devno;
ski_kbd_irq.claim = ski_kbd_claim;
irq_register(&ski_kbd_irq);
sysinfo_set_item_val("kbd", NULL, true);
sysinfo_set_item_val("kbd.inr", NULL, SKI_KBD_INR);
sysinfo_set_item_val("kbd.devno", NULL, ski_kbd_devno);
}
void ski_kbd_grab(void)
{
ipl_t ipl = interrupts_disable();
spinlock_lock(&ski_kbd_irq.lock);
ski_kbd_irq.notif_cfg.notify = false;
spinlock_unlock(&ski_kbd_irq.lock);
interrupts_restore(ipl);
}
void ski_kbd_release(void)
{
ipl_t ipl = interrupts_disable();
spinlock_lock(&ski_kbd_irq.lock);
if (ski_kbd_irq.notif_cfg.answerbox)
ski_kbd_irq.notif_cfg.notify = true;
spinlock_unlock(&ski_kbd_irq.lock);
interrupts_restore(ipl);
}
#define POLL_INTERVAL 50000 /* 50 ms */
/** Kernel thread for polling keyboard. */
void kkbdpoll(void *arg)
{
while (1) {
poll_keyboard();
thread_usleep(POLL_INTERVAL);
}
}
/** @}
*/