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78 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2005 Jakub Jermar
78 jermar 3
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup ia64   
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 * @{
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 */
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/** @file
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 */
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78 jermar 35
#include <arch/ski/ski.h>
577 palkovsky 36
#include <console/console.h>
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#include <console/chardev.h>
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#include <arch/interrupt.h>
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#include <sysinfo/sysinfo.h>
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#include <arch/types.h>
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#include <ddi/device.h>
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#include <ddi/irq.h>
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#include <ipc/irq.h>
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#include <proc/thread.h>
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#include <synch/spinlock.h>
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#include <arch/asm.h>
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#define SKI_KBD_INR 0
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static irq_t ski_kbd_irq;
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static devno_t ski_kbd_devno;
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chardev_t ski_console;
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chardev_t ski_uconsole;
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static bool kbd_disabled;
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static void ski_putchar(chardev_t *d, const char ch);
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static int32_t ski_getchar(void);
583 jermar 60
 
79 jermar 61
/** Display character on debug console
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 *
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 * Use SSC (Simulator System Call) to
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 * display character on debug console.
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 *
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 * @param d Character device.
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 * @param ch Character to be printed.
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 */
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void ski_putchar(chardev_t *d, const char ch)
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{
2082 decky 71
    asm volatile (
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        "mov r15 = %0\n"
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        "mov r32 = %1\n"    /* r32 is in0 */
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        "break 0x80000\n"   /* modifies r8 */
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        :
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        : "i" (SKI_PUTCHAR), "r" (ch)
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        : "r15", "in0", "r8"
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    );
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583 jermar 80
    if (ch == '\n')
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        ski_putchar(d, '\r');
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}
519 vana 83
 
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/** Ask debug console if a key was pressed.
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 *
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 * Use SSC (Simulator System Call) to
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 * get character from debug console.
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 *
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 * This call is non-blocking.
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 *
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 * @return ASCII code of pressed key or 0 if no key pressed.
519 vana 92
 */
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int32_t ski_getchar(void)
519 vana 94
{
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    uint64_t ch;
519 vana 96
 
2082 decky 97
    asm volatile (
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        "mov r15 = %1\n"
519 vana 99
        "break 0x80000;;\n" /* modifies r8 */
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        "mov %0 = r8;;\n"      
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584 jermar 102
        : "=r" (ch)
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        : "i" (SKI_GETCHAR)
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        : "r15", "r8"
519 vana 105
    );
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    return (int32_t) ch;
519 vana 108
}
577 palkovsky 109
 
892 vana 110
/**
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 * This is a blocking wrapper for ski_getchar().
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 * To be used when the kernel crashes.
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 */
892 vana 114
static char ski_getchar_blocking(chardev_t *d)
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{
893 jermar 116
    int ch;
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1942 jermar 118
    while(!(ch = ski_getchar()))
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        ;
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    if(ch == '\r')
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        ch = '\n';
892 vana 122
    return (char) ch;
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}
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577 palkovsky 125
/** Ask keyboard if a key was pressed. */
1945 jermar 126
static void poll_keyboard(void)
577 palkovsky 127
{
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    char ch;
1570 vana 129
    static char last;
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    ipl_t ipl;
577 palkovsky 131
 
1942 jermar 132
    ipl = interrupts_disable();
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134
    if (kbd_disabled) {
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        interrupts_restore(ipl);
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        return;
1942 jermar 137
    }
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139
    spinlock_lock(&ski_kbd_irq.lock);
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    ch = ski_getchar();
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    if(ch == '\r')
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        ch = '\n';
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    if (ch) {
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        if (ski_kbd_irq.notif_cfg.notify && ski_kbd_irq.notif_cfg.answerbox) {
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            chardev_push_character(&ski_uconsole, ch);
1942 jermar 147
            ipc_irq_send_notif(&ski_kbd_irq);
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        } else {
1507 vana 149
            chardev_push_character(&ski_console, ch);
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        }  
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        last = ch;
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        spinlock_unlock(&ski_kbd_irq.lock);
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        interrupts_restore(ipl);
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        return;
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    }
1507 vana 156
 
1942 jermar 157
    if (last) {
158
        if (ski_kbd_irq.notif_cfg.notify && ski_kbd_irq.notif_cfg.answerbox) {
1570 vana 159
            chardev_push_character(&ski_uconsole, 0);
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            ipc_irq_send_notif(&ski_kbd_irq);
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        }
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        last = 0;
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    }
1570 vana 164
 
1942 jermar 165
    spinlock_unlock(&ski_kbd_irq.lock);
166
    interrupts_restore(ipl);
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}
168
 
169
/* Called from getc(). */
1942 jermar 170
static void ski_kbd_enable(chardev_t *d)
577 palkovsky 171
{
1942 jermar 172
    kbd_disabled = false;
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}
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175
/* Called from getc(). */
1942 jermar 176
static void ski_kbd_disable(chardev_t *d)
577 palkovsky 177
{
1942 jermar 178
    kbd_disabled = true;   
577 palkovsky 179
}
180
 
1942 jermar 181
/** Decline to service hardware IRQ.
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 *
183
 * This is only a virtual IRQ, so always decline.
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 *
185
 * @return Always IRQ_DECLINE.
186
 */
187
static irq_ownership_t ski_kbd_claim(void)
188
{
189
    return IRQ_DECLINE;
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}
191
 
577 palkovsky 192
static chardev_operations_t ski_ops = {
1942 jermar 193
    .resume = ski_kbd_enable,
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    .suspend = ski_kbd_disable,
892 vana 195
    .write = ski_putchar,
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    .read = ski_getchar_blocking
577 palkovsky 197
};
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199
/** Initialize debug console
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 *
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 * Issue SSC (Simulator System Call) to
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 * to open debug console.
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 */
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void ski_init_console(void)
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{
2082 decky 206
    asm volatile (
1942 jermar 207
        "mov r15 = %0\n"
577 palkovsky 208
        "break 0x80000\n"
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        :
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        : "i" (SKI_INIT_CONSOLE)
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        : "r15", "r8"
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    );
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214
    chardev_initialize("ski_console", &ski_console, &ski_ops);
1507 vana 215
    chardev_initialize("ski_uconsole", &ski_uconsole, &ski_ops);
577 palkovsky 216
    stdin = &ski_console;
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    stdout = &ski_console;
1507 vana 218
 
1942 jermar 219
    ski_kbd_devno = device_assign_devno();
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221
    irq_initialize(&ski_kbd_irq);
222
    ski_kbd_irq.inr = SKI_KBD_INR;
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    ski_kbd_irq.devno = ski_kbd_devno;
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    ski_kbd_irq.claim = ski_kbd_claim;
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    irq_register(&ski_kbd_irq);
226
 
227
    sysinfo_set_item_val("kbd", NULL, true);
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    sysinfo_set_item_val("kbd.inr", NULL, SKI_KBD_INR);
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    sysinfo_set_item_val("kbd.devno", NULL, ski_kbd_devno);
1507 vana 230
}
1702 cejka 231
 
1942 jermar 232
void ski_kbd_grab(void)
233
{
1944 jermar 234
    ipl_t ipl = interrupts_disable();
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    spinlock_lock(&ski_kbd_irq.lock);
1942 jermar 236
    ski_kbd_irq.notif_cfg.notify = false;
1944 jermar 237
    spinlock_unlock(&ski_kbd_irq.lock);
238
    interrupts_restore(ipl);
1942 jermar 239
}
240
 
241
void ski_kbd_release(void)
242
{
1944 jermar 243
    ipl_t ipl = interrupts_disable();
244
    spinlock_lock(&ski_kbd_irq.lock);
1942 jermar 245
    if (ski_kbd_irq.notif_cfg.answerbox)
246
        ski_kbd_irq.notif_cfg.notify = true;
1944 jermar 247
    spinlock_unlock(&ski_kbd_irq.lock);
248
    interrupts_restore(ipl);
1942 jermar 249
}
250
 
1945 jermar 251
 
252
#define POLL_INTERVAL       50000       /* 50 ms */
253
 
254
/** Kernel thread for polling keyboard. */
255
void kkbdpoll(void *arg)
256
{
257
    while (1) {
258
        poll_keyboard();
259
        thread_usleep(POLL_INTERVAL);
260
    }
261
}
262
 
1888 jermar 263
/** @}
1702 cejka 264
 */