Fix checkpatch warnings

[emu8051.git] / src / common / timers.c

diff --git a/src/common/timers.c b/src/common/timers.c
index 68a92bc..b8afdfa 100644 (file)
--- a/src/common/timers.c
+++ b/src/common/timers.c
@@ -4,19 +4,7 @@
  * Copyright (C) 1999 Jonathan St-André
  * Copyright (C) 1999 Hugo Villeneuve <hugo@hugovil.com>
  *
- * This program 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; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ * This file is released under the GPLv2
  */
 
 #include <stdio.h>
@@ -31,9 +19,36 @@
 #include "psw.h"
 #include "options.h"
 #include "instructions_8051.h"
+#include "timers.h"
+
+static int gp_timer_value[GP_TIMERS_COUNT];
 
 extern struct options_t options;
 
+void
+gp_timer_reset(int id)
+{
+       log_debug("gp timer %d reset", id);
+       gp_timer_value[id] = 0;
+}
+
+void
+gp_timers_increment(int count)
+{
+       int id;
+
+       log_debug("gp timers increment");
+
+       for (id = 0; id < GP_TIMERS_COUNT; id++)
+               gp_timer_value[id] += count;
+}
+
+int
+gp_timer_read(int id)
+{
+       return gp_timer_value[id];
+}
+
 static void
 timer_increment_check_overflow(uint8_t counter_address, uint8_t tf_mask)
 {
@@ -51,7 +66,8 @@ timer_increment_check_overflow(uint8_t counter_address, uint8_t tf_mask)
 }
 
 static void
-timer_with_prescaler(uint8_t tl, uint8_t th, uint8_t tf_mask, int prescaler_width)
+timer_with_prescaler(uint8_t tl, uint8_t th, uint8_t tf_mask,
+                    int prescaler_width)
 {
        unsigned int prescaler;
 
@@ -67,7 +83,7 @@ timer_with_prescaler(uint8_t tl, uint8_t th, uint8_t tf_mask, int prescaler_widt
 
 static void
 process_timer(uint8_t tl, uint8_t th, uint8_t tf_mask, uint8_t TR, uint8_t mode,
-             uint8_t GATE, uint32_t TimerCounter)
+             uint8_t gate, uint32_t timer_counter)
 {
        unsigned int tmp;
 
@@ -89,8 +105,9 @@ process_timer(uint8_t tl, uint8_t th, uint8_t tf_mask, uint8_t TR, uint8_t mode,
                        /* If overflow -> reload and set TF0 */
                        cpu8051_WriteD(_TCON_, cpu8051_ReadD(_TCON_) | tf_mask);
                        cpu8051_WriteD(tl, cpu8051_ReadD(th));
-               } else
+               } else {
                        cpu8051_WriteD(tl, tmp);
+               }
                break;
        case 3:
                /*
@@ -102,7 +119,7 @@ process_timer(uint8_t tl, uint8_t th, uint8_t tf_mask, uint8_t TR, uint8_t mode,
                if (tl == _TL1_)
                        break;
 
-               if (TR && !GATE && !TimerCounter)
+               if (TR && !gate && !timer_counter)
                        timer_increment_check_overflow(tl, tf_mask);
 
                /* TH0 uses TR1 et TF1. */
@@ -115,30 +132,32 @@ process_timer(uint8_t tl, uint8_t th, uint8_t tf_mask, uint8_t TR, uint8_t mode,
        }
 }
 
-/* Run timers */
+/* Run 8051 timers */
 void
 timers_check(void)
 {
-       unsigned int TR;
-       unsigned int MODE;
-       unsigned int GATE;
-       unsigned int TimerCounter;
+       unsigned int tr;
+       unsigned int mode;
+       unsigned int gate;
+       unsigned int timer_counter;
 
        /* Timer 0 */
-       TR = cpu8051_ReadD(_TCON_) & 0x10;
-       MODE = cpu8051_ReadD(_TMOD_) & 0x03;
-       GATE = cpu8051_ReadD(_TMOD_) & 0x08;
-       TimerCounter = cpu8051_ReadD(_TMOD_) & 0x04;
+       tr = cpu8051_ReadD(_TCON_) & 0x10;
+       mode = cpu8051_ReadD(_TMOD_) & 0x03;
+       gate = cpu8051_ReadD(_TMOD_) & 0x08;
+       timer_counter = cpu8051_ReadD(_TMOD_) & 0x04;
 
-       if ((TR && !GATE && !TimerCounter) || (MODE == 3))
-               process_timer(_TL0_, _TH0_, 0x20, TR, MODE, GATE, TimerCounter);
+       if ((tr && !gate && !timer_counter) || (mode == 3))
+               process_timer(_TL0_, _TH0_, 0x20, tr, mode, gate,
+                             timer_counter);
 
        /* Timer 1 */
-       TR = cpu8051_ReadD(_TCON_) & 0x40;
-       MODE = (cpu8051_ReadD(_TMOD_) & 0x30) >> 4 ;
-       GATE = cpu8051_ReadD(_TMOD_) & 0x80;
-       TimerCounter = cpu8051_ReadD(_TMOD_) & 0x40;
-
-       if (TR && !GATE && !TimerCounter)
-               process_timer(_TL1_, _TH1_, 0x80, TR, MODE, GATE, TimerCounter);
+       tr = cpu8051_ReadD(_TCON_) & 0x40;
+       mode = (cpu8051_ReadD(_TMOD_) & 0x30) >> 4 ;
+       gate = cpu8051_ReadD(_TMOD_) & 0x80;
+       timer_counter = cpu8051_ReadD(_TMOD_) & 0x40;
+
+       if (tr && !gate && !timer_counter)
+               process_timer(_TL1_, _TH1_, 0x80, tr, mode, gate,
+                             timer_counter);
 }