source: trunk/kernel/arch/tsar/kdmsg.c @ 81

/*
 * kdmsg.c - output kernel debug/trace/information to an available terminal
 * (see kern/kdmsg.h)
 *
 * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless
 * Copyright (c) 2011,2012 UPMC Sorbonne Universites
 *
 * This file is part of ALMOS-kernel.
 *
 * ALMOS-kernel is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2.0 of the License.
 *
 * ALMOS-kernel is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <types.h>
#include <cpu.h>
#include <chdev.h>
#include <soclib_tty.h>
#include <arch-config.h>
#include <spinlock.h>
#include <distlock.h>
#include <mcs_sync.h>
#include <libk.h>
#include <kdmsg.h>

#define MSB(paddr) ((uint_t)((paddr)>>32))
#define LSB(paddr) ((uint_t)(paddr))

//spinlock_t printk_lock;
DISTLOCK_DECLARE(printk_lock);
//spinlock_t isr_lock;
DISTLOCK_DECLARE(isr_lock);

DISTLOCK_DECLARE(boot_lock);

kdmsg_channel_t klog_tty = {{.id = 1}};
kdmsg_channel_t kisr_tty = {{.id = 1}};
kdmsg_channel_t kexcept_tty = {{.id = 1}};

void kdmsg_init()
{
        uint_t tty_count;
  
        tty_count = 0;
        while((tty_count < TTY_DEV_NR) && (ttys_tbl[tty_count++] != NULL));
  
        if(tty_count >= 3)
        {
                kisr_tty.id = 3;
                kexcept_tty.id = 3;
        }
        
}

uint_t boot_cluster;
uint_t kboot_tty_cid;
uint_t kboot_tty_base;

void kboot_tty_init(boot_info_t *info)
{
        kboot_tty_base  = info->tty_base;

        kboot_tty_cid   = info->tty_cid;

        boot_cluster    = info->boot_cluster_id;
}

//TODO ?
int early_boot_dmsg (const char *fmt, ...)
{
        va_list ap;
        int count;

        //if(current_cluster->cid != boot_cluster) 
        //      return 0;

        va_start (ap, fmt);

        count = iprintk ((char*)kboot_tty_base, kboot_tty_cid, 0, (char *) fmt, ap);

        va_end (ap);
        
        return count;
}

int __arch_boot_dmsg (const char *fmt, ...)
{
        va_list ap;
        int count;


        va_start (ap, fmt);
                
        distlock_lock(&boot_lock);

        count = iprintk ((char*)kboot_tty_base, kboot_tty_cid, 0, (char *) fmt, ap);

        distlock_unlock(&boot_lock);

        va_end (ap);

        return count;
}

int __fprintk (int tty, ktty_lock_t ktty, const char *fmt, ...)
{
        va_list ap;
        int count;
        //uint_t irq_state;
        distlock_t *lock;

        va_start (ap, fmt);

        switch(ktty)
        {
                case PRINTK_KTTY_LOCK:
                        lock = &printk_lock;
                        break;
                case ISR_KTTY_LOCK:
                        lock = &isr_lock;
                        break;
                default:
                case NO_KTTY_LOCK:
                        lock = NULL;
                        break;
        }

        if(lock)
        {
                distlock_lock(lock);
        }
  
        count = iprintk ((char*)(ttys_tbl[tty]->base + TTY_WRITE_REG), 
                        ttys_tbl[tty]->cid, 0, (char *) fmt, ap);
   
        if(lock)
        {
                distlock_unlock(lock);
        }

        va_end (ap);

        return count;
}

#include <thread.h>

int __perror (int fatal, const char *fmt, ...)
{
        va_list ap;
        int count;

        va_start (ap, fmt);
        count = iprintk ((char*)(ttys_tbl[kexcept_tty.id]->base + TTY_WRITE_REG), 
                                ttys_tbl[kexcept_tty.id]->cid, 
                                0, (char *) fmt, ap);

        va_end (ap);
   
        if(fatal) while(1);
        return count;
}

#if 0
//FIXME add 40 bits support
void bdump(uint8_t *buff, size_t count)
{
        uint8_t b1, b2;
        char *tab = "0123456789ABCDEF";

        spinlock_lock(&ttys_tbl[klog_tty.id]->lock);

        while(count--) 
        {
                b1 = tab[(*buff & 0xF0)>>4];
                b2 = tab[*buff & 0x0F];
                buff++;
                *(char*)(ttys_tbl[klog_tty.id]->base + TTY_WRITE_REG) = b1;
                *(char*)(ttys_tbl[klog_tty.id]->base + TTY_WRITE_REG) = b2;
        }
        *(char*)(ttys_tbl[klog_tty.id]->base + TTY_WRITE_REG) = '\n';
        spinlock_unlock (&ttys_tbl[klog_tty.id]->lock);
}
#endif