/*
* 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 kernel_ia64
* @{
*/
/** @file
*/
#include <arch/drivers/ski.h>
#include <assert.h>
#include <console/console.h>
#include <console/chardev.h>
#include <ddi/ddi.h>
#include <sysinfo/sysinfo.h>
#include <stdint.h>
#include <proc/thread.h>
#include <synch/spinlock.h>
#include <arch/asm.h>
#include <arch/drivers/kbd.h>
#include <str.h>
#include <arch.h>
#include <stdlib.h>
enum {
/** Interval between polling in microseconds */
POLL_INTERVAL = 10000, /* 0.01 s */
/** Max. number of characters to pull out at a time */
POLL_LIMIT = 30,
SKI_INIT_CONSOLE = 20,
SKI_GETCHAR = 21,
SKI_PUTCHAR = 31
};
static void ski_putuchar(outdev_t *, const char32_t);
static outdev_operations_t skidev_ops = {
.write = ski_putuchar,
.redraw = NULL,
.scroll_up = NULL,
.scroll_down = NULL
};
static ski_instance_t *instance = NULL;
static parea_t ski_parea;
/** 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.
*
*/
static char32_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 (char32_t) ch;
}
/** Ask keyboard if a key was pressed.
*
* If so, it will repeat and pull up to POLL_LIMIT characters.
*/
static void poll_keyboard(ski_instance_t *instance)
{
int count = POLL_LIMIT;
if (ski_parea.mapped && !console_override)
return;
while (count > 0) {
char32_t ch = ski_getchar();
if (ch == '\0')
break;
indev_push_character(instance->srlnin, ch);
--count;
}
}
/** Kernel thread for polling keyboard. */
static void kskipoll(void *arg)
{
ski_instance_t *instance = (ski_instance_t *) arg;
while (true) {
poll_keyboard(instance);
thread_usleep(POLL_INTERVAL);
}
}
/** Initialize debug console
*
* Issue SSC (Simulator System Call) to
* to open debug console.
*
*/
static void ski_init(void)
{
uintptr_t faddr;
if (instance)
return;
asm volatile (
"mov r15 = %0\n"
"break 0x80000\n"
:
: "i" (SKI_INIT_CONSOLE)
: "r15", "r8"
);
faddr = frame_alloc(1, FRAME_LOWMEM | FRAME_ATOMIC, 0);
if (faddr == 0)
panic("Cannot allocate page for ski console.");
ddi_parea_init(&ski_parea);
ski_parea.pbase = faddr;
ski_parea.frames = 1;
ski_parea.unpriv = false;
ski_parea.mapped = false;
ddi_parea_register(&ski_parea);
sysinfo_set_item_val("ski.paddr", NULL, (sysarg_t) faddr);
instance = malloc(sizeof(ski_instance_t));
if (instance) {
instance->thread = thread_create(kskipoll, instance, TASK,
THREAD_FLAG_UNCOUNTED, "kskipoll");
if (!instance->thread) {
free(instance);
instance = NULL;
return;
}
instance->srlnin = NULL;
}
}
static void ski_do_putchar(char ch)
{
asm volatile (
"mov r15 = %[cmd]\n"
"mov r32 = %[ch]\n" /* r32 is in0 */
"break 0x80000\n" /* modifies r8 */
:
: [cmd] "i" (SKI_PUTCHAR), [ch] "r" (ch)
: "r15", "in0", "r8"
);
}
/** Display character on debug console
*
* Use SSC (Simulator System Call) to
* display character on debug console.
*
* @param dev Character device.
* @param ch Character to be printed.
*
*/
static void ski_putuchar(outdev_t *dev, char32_t ch)
{
if (ski_parea.mapped && !console_override)
return;
if (ascii_check(ch)) {
if (ch == '\n')
ski_do_putchar('\r');
ski_do_putchar(ch);
} else {
ski_do_putchar('?');
}
}
outdev_t *skiout_init(void)
{
ski_init();
if (!instance)
return NULL;
outdev_t *skidev = malloc(sizeof(outdev_t));
if (!skidev)
return NULL;
outdev_initialize("skidev", skidev, &skidev_ops);
skidev->data = instance;
if (!fb_exported) {
/*
* This is the necessary evil until
* the userspace driver is entirely
* self-sufficient.
*/
sysinfo_set_item_val("fb", NULL, true);
sysinfo_set_item_val("fb.kind", NULL, 6);
fb_exported = true;
}
return skidev;
}
ski_instance_t *skiin_init(void)
{
ski_init();
return instance;
}
void skiin_wire(ski_instance_t *instance, indev_t *srlnin)
{
assert(instance);
assert(srlnin);
instance->srlnin = srlnin;
thread_start(instance->thread);
sysinfo_set_item_val("kbd", NULL, true);
sysinfo_set_item_val("kbd.type", NULL, KBD_SKI);
}
/** @}
*/