/*
* 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.
*/
#include <arch/ski/ski.h>
#include <console/console.h>
#include <console/chardev.h>
#include <arch/interrupt.h>
#include <sysinfo/sysinfo.h>
chardev_t ski_console;
chardev_t ski_uconsole;
static bool kb_disable;
int kbd_uspace=0;
static void ski_putchar(chardev_t *d, const char ch);
static __s32 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.
*/
__s32 ski_getchar(void)
{
__u64 ch;
__asm__ volatile (
"mov r15=%1\n"
"break 0x80000;;\n" /* modifies r8 */
"mov %0=r8;;\n"
: "=r" (ch)
: "i" (SKI_GETCHAR)
: "r15", "r8"
);
return (__s32) 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. */
void poll_keyboard(void)
{
char ch;
static char last;
if (kb_disable)
return;
ch = ski_getchar();
if(ch == '\r')
ch = '\n';
if (ch){
if(kbd_uspace){
chardev_push_character(&ski_uconsole, ch);
virtual_interrupt(IRQ_KBD,NULL);
}
else {
chardev_push_character(&ski_console, ch);
}
last = ch;
return;
}
if (last){
if(kbd_uspace){
chardev_push_character(&ski_uconsole, 0);
virtual_interrupt(IRQ_KBD,NULL);
}
else {
}
last = 0;
}
}
/* Called from getc(). */
static void ski_kb_enable(chardev_t *d)
{
kb_disable = false;
}
/* Called from getc(). */
static void ski_kb_disable(chardev_t *d)
{
kb_disable = true;
}
static chardev_operations_t ski_ops = {
.resume = ski_kb_enable,
.suspend = ski_kb_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;
}
/** Setup console sysinfo (i.e. Keyboard IRQ)
*
* Because sysinfo neads memory allocation/dealocation
* this functions should be called separetely from init.
*
*/
void ski_set_console_sysinfo(void)
{
sysinfo_set_item_val("kbd",NULL,true);
sysinfo_set_item_val("kbd.irq",NULL,IRQ_KBD);
}