2000-12-13 Joel Sherrill <joel@OARcorp.com>

* README: Updated.  We are now vectoring a clock tick ISR handler.
	But RTEMS is not returning from the ISR properly.
	* clock/clockdrv.c: Now causes interrupts but has not been calibrated.
	* include/bsp.h: Use <libcpu/tx3904.h>
	* startup/Makefile.am: Add setvec.c from shared.
	* startup/bspstart.c: Initialize the status register (SR) so
	no interrupts are masked but global interrupts (SR_IEC) are off.
	Added call to install the ISR prologue code.
	* wrapup/Makefile.am: Pick up more pieces from libcpu.

c/src/lib/libbsp/mips/jmr3904/ChangeLog

@@ -1,3 +1,15 @@
+2000-12-13	Joel Sherrill <joel@OARcorp.com>
+
+	* README: Updated.  We are now vectoring a clock tick ISR handler.
+	But RTEMS is not returning from the ISR properly.
+	* clock/clockdrv.c: Now causes interrupts but has not been calibrated.
+	* include/bsp.h: Use <libcpu/tx3904.h>
+	* startup/Makefile.am: Add setvec.c from shared.
+	* startup/bspstart.c: Initialize the status register (SR) so
+	no interrupts are masked but global interrupts (SR_IEC) are off.
+	Added call to install the ISR prologue code.
+	* wrapup/Makefile.am: Pick up more pieces from libcpu.
+
 2000-12-11	Joel Sherrill <joel@OARcorp.com>
 
 	* startup/bspclean.c: New file to explicitly invoke _sys_exit().

c/src/lib/libbsp/mips/jmr3904/README

@@ -14,12 +14,21 @@ GDB must be configured with a target like "tx39-rtems".  Otherwise,
 the simulator will not be built for the correct instruction
 and peripheral set.
 
+Simulator Information
+=====================
+The simulated system clock counts instructions.  Setting the clock
+source to "clock" and the divider to 1 results in the timer directly
+counting the number of instructions executed.
+
 Status
 ======
 
 + hello.exe locks up while running the global destructors.  This almost
   has to be a linkcmds issue.
 
-+ There is no clock tick device driver.
++ Workaround: bspclean.c actually explicits invokes _sys_exit() BEFORE
+  letting the global destructors run.
+
++ There is a clock tick device driver which has not been calibrated.
 
 + There is no timer device driver.

c/src/lib/libbsp/mips/jmr3904/clock/clockdrv.c

@@ -7,12 +7,26 @@
  *  $Id$
  */
 
-#define CLOCK_VECTOR 0
+#include <rtems.h>
+#include <libcpu/tx3904.h>
+
+#define CLOCK_VECTOR TX3904_IRQ_TMR0
 
 #define Clock_driver_support_at_tick()
 
+/* XXX */
+#define CLICKS 10000
 #define Clock_driver_support_install_isr( _new, _old ) \
-  do { _old = 0; } while(0)
+  do { \
+    unsigned32 _clicks = CLICKS; \
+    _old = (rtems_isr_entry) set_vector( _new, CLOCK_VECTOR, 1 ); \
+    TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_CCDR, 0x3 ); \
+    TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_CPRA, _clicks ); \
+    TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_TISR, 0x00 ); \
+    TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_ITMR, 0x8001 ); \
+    TX3904_TIMER_WRITE( TX3904_TIMER0_BASE, TX3904_TIMER_TCR,   0xC0 ); \
+    *((volatile unsigned32 *) 0xFFFFC01C) = 0x00000700; \
+  } while(0)
 
 
 #define Clock_driver_support_initialize_hardware()

c/src/lib/libbsp/mips/jmr3904/include/bsp.h

@@ -24,6 +24,7 @@ extern "C" {
 #include <iosupp.h>
 #include <console.h>
 #include <clockdrv.h>
+#include <libcpu/tx3904.h>
 
 /*
  *  Define the time limits for RTEMS Test Suite test durations.

c/src/lib/libbsp/mips/jmr3904/startup/Makefile.am

@@ -9,7 +9,7 @@ VPATH = @srcdir@:@srcdir@/../../../shared
 PGM = $(ARCH)/startup.rel
 
 C_FILES = bspclean.c bsplibc.c bsppost.c bspstart.c bootcard.c main.c sbrk.c \
-    gnatinstallhandler.c
+    gnatinstallhandler.c setvec.c
 C_O_FILES = $(C_FILES:%.c=$(ARCH)/%.o)
 
 OBJS = $(C_O_FILES)

c/src/lib/libbsp/mips/jmr3904/startup/bspstart.c

@@ -90,6 +90,10 @@ void bsp_start( void )
    _sys_exit( 1 );
 
   BSP_Configuration.work_space_start = (void *) &WorkspaceBase;
+
+  mips_set_sr( 0xff00 );  /* all interrupts unmasked but globally off */
+                          /* depend on the IRC to take care of things */
+  mips_install_isr_entries();
 }
 
 /* XXX */

c/src/lib/libbsp/mips/jmr3904/wrapup/Makefile.am

@@ -12,6 +12,8 @@ include $(top_srcdir)/../../../../../../automake/lib.am
 
 # bummer; have to use $foreach since % pattern subst rules only replace 1x
 OBJS = $(foreach piece, $(BSP_FILES), $(wildcard ../$(piece)/$(ARCH)/*.o)) \
+    $(wildcard ../../../../libcpu/$(RTEMS_CPU)/shared/*/$(ARCH)/*.o) \
+    $(wildcard ../../../../libcpu/$(RTEMS_CPU)/tx39/*/$(ARCH)/*.o) \
     $(wildcard ../../../../libcpu/$(RTEMS_CPU)/$(RTEMS_CPU_MODEL)/$(ARCH)/*.o) \
     $(foreach piece, $(GENERIC_FILES), ../../../$(piece)/$(ARCH)/$(piece).rel)