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Continue work on RX600 port - work in progress.

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This commit is contained in:
Richard Barry 2010-08-13 17:38:50 +00:00
parent 6052827afe
commit 21898cc9d9
2 changed files with 98 additions and 20 deletions
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110
Source/portable/Renesas/RX600/port.c
View file

@ -64,16 +64,15 @@
/*-----------------------------------------------------------*/
/* Dimensions the array into which the floating point context is saved.
Allocate enough space for FPR0 to FPR15, FPUL and FPSCR, each of which is 4
bytes big. If this number is changed then the 72 in portasm.src also needs
changing. */
#define portFLOP_REGISTERS_TO_STORE ( 18 )
#define portFLOP_STORAGE_SIZE ( portFLOP_REGISTERS_TO_STORE * 4 )
/* Tasks should start with interrupts enabled, therefore PSW is set with U,I,PM
flags set and IPL clear. */
#define portINITIAL_PSW ( ( portSTACK_TYPE ) 0x00130000 )
/*
U = 1 User stack pointer.
I = 1 Interrupts enabled.
PM = 0 Supervisor mode.
IPL = 0 All interrupt priorities enabled.
*/
#define portINITIAL_PSW ( ( portSTACK_TYPE ) 0x00030000 )
#define portINITIAL_FPSW ( ( portSTACK_TYPE ) 0x00000100 )
@ -89,6 +88,16 @@ void vPortYield( void );
*/
void vPortStartFirstTask( void );
void vPortPendContextSwitch( void );
static void prvStartFirstTask( void );
/*-----------------------------------------------------------*/
extern void *pxCurrentTCB;
unsigned char ucIPLToRestore = 0;
/*-----------------------------------------------------------*/
/*
@ -148,17 +157,17 @@ portBASE_TYPE xPortStartScheduler( void )
{
extern void vApplicationSetupTimerInterrupt( void );
/* Call an application function to set up the timer that will generate the
tick interrupt. This way the application can decide which peripheral to
use. A demo application is provided to show a suitable example. */
vApplicationSetupTimerInterrupt();
/* Use pxCurrentTCB just so it does not get optimised away. */
if( pxCurrentTCB != NULL )
{
/* Call an application function to set up the timer that will generate the
tick interrupt. This way the application can decide which peripheral to
use. A demo application is provided to show a suitable example. */
vApplicationSetupTimerInterrupt();
/* Start the first task. This will only restore the standard registers and
not the flop registers. This does not really matter though because the only
flop register that is initialised to a particular value is fpscr, and it is
only initialised to the current value, which will still be the current value
when the first task starts executing. */
//trapa( portSTART_SCHEDULER_TRAP_NO );
/* Start the first task. */
prvStartFirstTask();
}
/* Should not get here. */
return pdFAIL;
@ -176,3 +185,68 @@ void vPortYield( void )
}
/*-----------------------------------------------------------*/
#pragma interrupt (vTickISR(vect=configTICK_VECTOR,enable))
void vTickISR( void )
{
/* Restore previous IPL on exit. */
//set_ipl( configMAX_SYSCALL_INTERRUPT_PRIORITY );
/* Clear the interrupt. */
vTaskIncrementTick();
#if( configUSE_PREEMPTION == 1 )
taskYIELD();
#endif
}
/*-----------------------------------------------------------*/
void vPortSetInterruptMask( void )
{
unsigned char ucPreviousIPL;
/* Store the current IPL to ensure it is restored correctly later if it is
not currently 0. This is a stack variable, so there should not be a race
condition even if there is an interrupt or context switch before the new
IPL value gets set. */
ucPreviousIPL = get_ipl();
/* Set the mask up to the max syscall priority. */
set_ipl( configMAX_SYSCALL_INTERRUPT_PRIORITY );
/* Now the mask is set there will not be a context switch, so the previous
and current IPL values can be compared. This ensures against the IPL being
set back to zero too early when critical sections nest. */
if( ucPreviousIPL < configMAX_SYSCALL_INTERRUPT_PRIORITY )
{
ucIPLToRestore = ucPreviousIPL;
}
}
/*-----------------------------------------------------------*/
#pragma inline_asm prvStartFirstTask
static void prvStartFirstTask( void )
{
/* When starting the scheduler there is nothing that needs moving to the
interrupt stack because the function is not called from an interrupt.
Just ensure the current stack is the user stack. */
SETPSW U
/* Obtain the location of the stack associated with which ever task
pxCurrentTCB is currently pointing to. */
MOV.L #_pxCurrentTCB,R15
MOV.L [R15],R15
MOV.L [R15],R0
/* Restore the registers from the stack of the task pointed to by
pxCurrentTCB. */
POP R15
MVTACLO R15 /* Accumulator low 32 bits. */
POP R15
MVTACHI R15 /* Accumulator high 32 bits. */
POP R15
MVTC R15,FPSW /* Floating point status word. */
POPM R1-R15 /* R1 to R15 - R0 is not included as it is the SP. */
RTE /* This pops the remaining registers. */
NOP
NOP
}

8
Source/portable/Renesas/RX600/portmacro.h
View file

@ -59,6 +59,9 @@
extern "C" {
#endif
/* Hardware specifics. */
#include "machine.h"
/*-----------------------------------------------------------
* Port specific definitions.
*
@ -106,8 +109,9 @@ extern void vTaskSwitchContext( void );
* These macros should be called directly, but through the taskENTER_CRITICAL()
* and taskEXIT_CRITICAL() macros.
*/
#define portENABLE_INTERRUPTS()
#define portDISABLE_INTERRUPTS()
extern unsigned char ucIPLToRestore;
#define portENABLE_INTERRUPTS() set_ipl( ucIPLToRestore )
#define portDISABLE_INTERRUPTS() vPortSetInterruptMask()
/* Critical nesting counts are stored in the TCB. */
#define portCRITICAL_NESTING_IN_TCB ( 1 )