From: geijoenr <enric.geijo@gmail.com>
Date: Sun, 1 Feb 2015 19:07:22 +0000 (+0000)
Subject: msx2: make tickspersec runtime configurable
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=81909bf7303d9ef8c609cf3dfccffe05abd480ed;p=FUZIX.git

msx2: make tickspersec runtime configurable
---

diff --git a/Kernel/include/kdata.h b/Kernel/include/kdata.h
index 3336754f..9a67abcf 100644
--- a/Kernel/include/kdata.h
+++ b/Kernel/include/kdata.h
@@ -35,6 +35,7 @@ extern ptptr init_process;  /* The process table address of the first process. *
 extern bool inint;     /* flag is set whenever interrupts are being serviced */
 
 extern uint8_t ticks_this_dsecond;       /* Tick counter for counting off one decisecond */
+extern uint8_t ticks_per_dsecond;	 /* Ticks per decisecond at machine interrupt rate rate */
 extern uint16_t runticks;  /* Number of ticks current process has been swapped in */
 
 extern time_t tod;      /* Time of day */
diff --git a/Kernel/kdata.c b/Kernel/kdata.c
index 565b76e8..6e3a2cb7 100644
--- a/Kernel/kdata.c
+++ b/Kernel/kdata.c
@@ -10,11 +10,11 @@ uint16_t runticks;
 bool inint;
 uint16_t root_dev;
 uint8_t ticks_this_dsecond;
+uint8_t ticks_per_dsecond;
 inoptr root;
 uint16_t waitno;
 time_t tod;			// time of day
 ticks_t ticks;
-
 int16_t acct_fh = -1;		/* Accounting file handle */
 
 struct runload loadavg[3] = {
diff --git a/Kernel/platform-msx2/config.h b/Kernel/platform-msx2/config.h
index d62e44bc..30981335 100644
--- a/Kernel/platform-msx2/config.h
+++ b/Kernel/platform-msx2/config.h
@@ -23,7 +23,7 @@
 #define VT_RIGHT	79
 #define VT_BOTTOM	23
 
-#define TICKSPERSEC 50   /* Ticks per second (actually should be dynamic FIXME) */
+#define TICKSPERSEC 60	    /* default value, it will be upated on device_init */
 #define PROGBASE    0x0000  /* also data base */
 #define PROGLOAD    0x0100
 #define PROGTOP     0xF000  /* Top of program, base of U_DATA */
diff --git a/Kernel/platform-msx2/devices.c b/Kernel/platform-msx2/devices.c
index fd038df9..5ec5d79e 100644
--- a/Kernel/platform-msx2/devices.c
+++ b/Kernel/platform-msx2/devices.c
@@ -67,8 +67,10 @@ void device_init(void)
     }
     if ((infobits & INTFREQ_MASK) == INTFREQ_60Hz) {
 	kprintf("60Hz\n");
+	ticks_per_dsecond = 6;
     } else {
 	kprintf("50Hz\n");
+	ticks_per_dsecond = 5;
     }
 
     if (megasd_probe()) {
diff --git a/Kernel/process.c b/Kernel/process.c
index 97ad52fb..1a705471 100644
--- a/Kernel/process.c
+++ b/Kernel/process.c
@@ -331,7 +331,7 @@ void timer_interrupt(void)
 
 	/* Do once-per-decisecond things - this doesn't work out well on
 	   boxes with 64 ticks/second.. need a better approach */
-	if (++ticks_this_dsecond == TICKSPERSEC / 10) {
+	if (++ticks_this_dsecond == ticks_per_dsecond) {
 		static ptptr p;
 
 		/* Update global time counters */
diff --git a/Kernel/start.c b/Kernel/start.c
index 0f56d18c..c1ecd340 100644
--- a/Kernel/start.c
+++ b/Kernel/start.c
@@ -152,6 +152,10 @@ void fuzix_main(void)
 
 	create_init();
 	kputs("Enabling interrupts ... ");
+
+	/* runtime configurable, defaults to build time setting */
+	ticks_per_dsecond = TICKSPERSEC / 10;
+
         ei();
 	kputs("ok.\n");
 
diff --git a/Kernel/syscall_fs2.c b/Kernel/syscall_fs2.c
index 5357fa68..b96656ff 100644
--- a/Kernel/syscall_fs2.c
+++ b/Kernel/syscall_fs2.c
@@ -670,6 +670,7 @@ arg_t _uname(void)
 	sysinfo.memk = procmem;
 	sysinfo.usedk = pagemap_mem_used();
 	sysinfo.nproc = PTABSIZE;
+	sysinfo.ticks = ticks_per_dsecond * 10;
 	sysinfo.loadavg[0] = loadavg[0].average;
 	sysinfo.loadavg[1] = loadavg[1].average;
 	sysinfo.loadavg[2] = loadavg[2].average;