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2001-05-22 Greg Menke <gregory.menke@gsfc.nasa.gov>

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* Assisted in design and debug by Joel Sherrill <joel@OARcorp.com>.
	* clock/clockdrv.c, console/conscfg.c: Corrected.
	* include/bsp.h: Support for tm27 and addition of CPU_CLOCK_RATE.
	* startup/bspstart.c: Properly set initial status register and
	pending interrupts.
	* timer/timer.c: Works now.
This commit is contained in:
Joel Sherrill
2001-05-22 23:07:09 +00:00
parent e2040badd2
commit a355e3ea98
6 changed files with 142 additions and 64 deletions
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9
c/src/lib/libbsp/mips/genmongoosev/ChangeLog
View File

@@ -1,3 +1,12 @@
2001-05-22 Greg Menke <gregory.menke@gsfc.nasa.gov>
* Assisted in design and debug by Joel Sherrill <joel@OARcorp.com>.
* clock/clockdrv.c, console/conscfg.c: Corrected.
* include/bsp.h: Support for tm27 and addition of CPU_CLOCK_RATE.
* startup/bspstart.c: Properly set initial status register and
pending interrupts.
* timer/timer.c: Works now.
2001-05-10 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
* configure.in: Use RTEMS_PROG_CC_FOR_TARGET([-ansi -fasm]).

30
c/src/lib/libbsp/mips/genmongoosev/clock/clockdrv.c
View File

@@ -23,14 +23,16 @@
#define CLOCK_VECTOR MONGOOSEV_IRQ_TIMER1
#endif
/* reset Timeout (TO) bit */
#define Clock_driver_support_at_tick() \
MONGOOSEV_WRITE_REGISTER( \
CLOCK_BASE, \
MONGOOSEV_TIMER_CONTROL_REGISTER, \
(MONGOOSEV_TIMER_CONTROL_COUNTER_ENABLE | \
MONGOOSEV_TIMER_CONTROL_INTERRUPT_ENABLE) \
);
do { \
MONGOOSEV_WRITE_REGISTER( CLOCK_BASE, MONGOOSEV_TIMER_CONTROL_REGISTER, \
(MONGOOSEV_TIMER_CONTROL_COUNTER_ENABLE | MONGOOSEV_TIMER_CONTROL_INTERRUPT_ENABLE)); \
} while(0)
#define Clock_driver_support_install_isr( _new, _old ) \
do { \
@@ -38,20 +40,12 @@
} while(0)
extern int ClockRate;
#define CLICKS (((unsigned32) &ClockRate) / 1000000 )
#define Clock_driver_support_initialize_hardware() \
do { \
unsigned32 _clicks; \
_clicks = CLICKS * rtems_configuration_get_microseconds_per_tick(); \
MONGOOSEV_WRITE_REGISTER( \
CLOCK_BASE, \
MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER, \
_clicks \
); \
do { \
unsigned32 _clicks = CPU_CLOCK_RATE_MHZ * rtems_configuration_get_microseconds_per_tick(); \
MONGOOSEV_WRITE_REGISTER( CLOCK_BASE, MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER, _clicks ); \
Clock_driver_support_at_tick(); \
} while(0)
} while(0)
#define Clock_driver_support_shutdown_hardware() \
MONGOOSEV_WRITE_REGISTER( CLOCK_BASE, MONGOOSEV_TIMER_CONTROL_REGISTER, 0 )

8
c/src/lib/libbsp/mips/genmongoosev/console/conscfg.c
View File

@@ -18,14 +18,14 @@
#include <libchip/serial.h>
#include <libchip/mg5uart.h>
#if (CONSOLE_USE_INTERRUPTS)
/* #define CONSOLE_USE_INTERRUPTS */
#ifdef CONSOLE_USE_INTERRUPTS
#define MG5UART_FUNCTIONS &mg5uart_fns
#else
#define MG5UART_FUNCTIONS &mg5uart_fns_polled
#endif
extern int ClockRate;
#define CLOCK_RATE (unsigned32) &ClockRate
console_tbl Console_Port_Tbl[] = {
{
@@ -91,5 +91,3 @@ void GENMG5_output_char(char c) { write( 2, &c, 1 ); }
BSP_output_char_function_type BSP_output_char = GENMG5_output_char;
BSP_polling_getchar_function_type BSP_poll_char = NULL;

48
c/src/lib/libbsp/mips/genmongoosev/include/bsp.h
View File

@@ -26,6 +26,34 @@ extern "C" {
#include <clockdrv.h>
#include <libcpu/mongoose-v.h>
#ifndef CPU_CLOCK_RATE
#define CLOCK_RATE 12000000
#endif
#define CPU_CLOCK_RATE_HZ CLOCK_RATE
#define CPU_CLOCK_RATE_MHZ (CLOCK_RATE/1000000)
/*
* Useful defines set here so we can avoid duplicating them all over
* creation.
*
*/
/*
* assertSoftwareInt defined in vectorisrs.c the prototype is here so
* userspace code can get to it directly.
* */
extern void assertSoftwareInterrupt(unsigned32);
/*
* Define the time limits for RTEMS Test Suite test durations.
* Long test and short test duration limits are provided. These
@@ -44,23 +72,28 @@ extern "C" {
*
*/
#define CLOCK_VECTOR MONGOOSEV_IRQ_TIMER1
#define MUST_WAIT_FOR_INTERRUPT 1
#if 0
#if 1
#define Install_tm27_vector( handler ) \
(void) set_vector( handler, MONGOOSEV_IRQ_SOFTWARE_1, 1 ); \
(void) set_vector( handler, MONGOOSEV_IRQ_SOFTWARE_1, 1 );
#define Cause_tm27_intr() \
asm volatile ( "syscall 0x01" : : );
#define CLOCK_VECTOR MONGOOSEV_IRQ_TMR0
#define Cause_tm27_intr() assertSoftwareInterrupt(0);
#define Clear_tm27_intr()
#define Lower_tm27_intr()
#else
#define Install_tm27_vector( handler ) \
(void) set_vector( handler, MONGOOSEV_IRQ_TMR0, 1 ); \
(void) set_vector( handler, MONGOOSEV_IRQ_TIMER1, 1 );
#define Cause_tm27_intr() \
do { \
@@ -68,7 +101,6 @@ extern "C" {
} while(0)
#define Clear_tm27_intr()
#define Lower_tm27_intr()
#endif

74
c/src/lib/libbsp/mips/genmongoosev/startup/bspstart.c
View File

@@ -21,6 +21,8 @@
#include <rtems/libcsupport.h>
#include <libcpu/mongoose-v.h>
/*
* The original table from the application and our copy of it with
* some changes.
@@ -57,18 +59,22 @@ void bsp_libc_init( void *, unsigned32, int );
void bsp_pretasking_hook(void)
{
extern int HeapBase;
extern int HeapSize;
extern int HeapBase;
extern int HeapSize;
void *heapStart = &HeapBase;
unsigned long heapSize = (unsigned long)&HeapSize;
unsigned long ramSpace;
bsp_libc_init(heapStart, (unsigned32) heapSize, 0);
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
/*
* bsp_start
*
@@ -79,33 +85,65 @@ void bsp_start( void )
{
extern int _end;
extern int WorkspaceBase;
extern int _RamSize, _RamBase;
int ram_left;
ram_left = (unsigned32) &_RamSize -
(unsigned32)&WorkspaceBase - (unsigned32) &_RamBase;
/* Configure Number of Register Caches */
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.postdriver_hook = bsp_postdriver_hook;
Cpu_table.interrupt_stack_size = 4096;
if ( BSP_Configuration.work_space_size > ram_left )
_sys_exit( 1 );
/* HACK -- tied to value linkcmds */
if ( BSP_Configuration.work_space_size >(4096*1024) )
_sys_exit( 1 );
BSP_Configuration.work_space_start = (void *) &WorkspaceBase;
/* Clear all pending peripheral interrupts and mask them. */
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_FUNCTION_INTERRUPT_CAUSE_REGISTER, 0 );
MONGOOSEV_WRITE( MONGOOSEV_WATCHDOG, 0xA0 );
/* reset the config register & clear any pending peripheral interrupts */
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_COMMAND_REGISTER, 0 );
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_COMMAND_REGISTER, MONGOOSEV_UART_CMD_RESET_BOTH_PORTS );
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_COMMAND_REGISTER, 0 );
/* reset both timers */
MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER1_BASE, MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER, 0xffffffff );
MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER1_BASE, MONGOOSEV_TIMER_CONTROL_REGISTER, 0);
MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER2_BASE, MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER, 0xffffffff );
MONGOOSEV_WRITE_REGISTER( MONGOOSEV_TIMER2_BASE, MONGOOSEV_TIMER_CONTROL_REGISTER, 0);
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_FUNCTION_INTERRUPT_MASK_REGISTER, 0 );
MONGOOSEV_WRITE( MONGOOSEV_PERIPHERAL_STATUS_REGISTER, 0xffffffff );
/*
* Enable coprocessors.
* Disable external interrupts.
* Enable software interrupts.
*/
/* clear any writable bits in the cause register */
mips_set_cause( 0 );
mips_set_sr( (SR_CU0 | SR_CU1 | SR_IBIT1 | SR_IBIT2) );
/*all interrupts unmasked but globally off. depend on the IRC to take care of things */
mips_set_sr( (SR_CU0 | SR_CU1 | 0xff00) );
mips_install_isr_entries();
}
void clear_cache( void *address, size_t n )
{
}
/* Structure filled in by get_mem_info. Only the size field is
actually used (to clear bss), so the others aren't even filled in. */
struct s_mem
{
unsigned int size;
unsigned int icsize;
unsigned int dcsize;
};
void
get_mem_info (mem)
struct s_mem *mem;
{
mem->size = 0x1000000; /* XXX figure out something here */
}

37
c/src/lib/libbsp/mips/genmongoosev/timer/timer.c
View File

@@ -37,20 +37,21 @@ void Timer_initialize()
* the compare register is set to the maximum value.
*/
MONGOOSEV_WRITE_REGISTER(
TIMER_BASE,
MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER,
0xffffffff
);
MONGOOSEV_WRITE_REGISTER(
TIMER_BASE,
MONGOOSEV_TIMER_CONTROL_REGISTER,
MONGOOSEV_TIMER_CONTROL_COUNTER_ENABLE
);
MONGOOSEV_WRITE_REGISTER( TIMER_BASE, MONGOOSEV_TIMER_CONTROL_REGISTER, 0);
MONGOOSEV_WRITE_REGISTER( TIMER_BASE,
MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER,
0xffffffff );
MONGOOSEV_WRITE_REGISTER( TIMER_BASE,
MONGOOSEV_TIMER_CONTROL_REGISTER,
MONGOOSEV_TIMER_CONTROL_COUNTER_ENABLE );
}
#define AVG_OVERHEAD 0 /* It typically takes N instructions */
/* to start/stop the timer. */
#define LEAST_VALID 1 /* Don't trust a value lower than this */
/* mongoose-v can count cycles. :) */
#include <bspIo.h>
@@ -61,13 +62,16 @@ int Read_timer()
rtems_unsigned32 total;
rtems_unsigned32 tcr;
clicks = MONGOOSEV_READ_REGISTER(
TIMER_BASE,
MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER
);
clicks = MONGOOSEV_READ_REGISTER( TIMER_BASE,
MONGOOSEV_TIMER_INITIAL_COUNTER_REGISTER );
total = 0xffffffff - clicks;
tcr = MONGOOSEV_READ_REGISTER( TIMER_BASE, MONGOOSEV_TIMER_CONTROL_REGISTER );
MONGOOSEV_WRITE_REGISTER( TIMER_BASE,
MONGOOSEV_TIMER_CONTROL_REGISTER,
0 );
if ( tcr & MONGOOSEV_TIMER_CONTROL_TIMEOUT )
printk( "MG5 timer overran\n" );
@@ -77,7 +81,7 @@ int Read_timer()
if ( total < LEAST_VALID )
return 0; /* below timer resolution */
return total - AVG_OVERHEAD;
return (total - AVG_OVERHEAD) / CPU_CLOCK_RATE_MHZ;
}
rtems_status_code Empty_function( void )
@@ -91,3 +95,6 @@ void Set_find_average_overhead(
{
Timer_driver_Find_average_overhead = find_flag;
}
/* eof */