Renaming .s to .S.

git-svn-id: http://svn.code.sf.net/p/freertos/code/trunk@246 1d2547de-c912-0410-9cb9-b8ca96c0e9e2

Source/portable/GCC/PPC405_Xilinx/portasm.s

-#include "xreg405.h"
-
-	.extern pxCurrentTCB
-	.extern vTaskSwitchContext
-	.extern vTaskIncrementTick
-	.extern vPortISRHandler
-
-	.global vPortStartFirstTask
-	.global vPortYield
-	.global vPortTickISR
-	.global vPortISRWrapper
-
-.set	BChainField, 0
-.set	NextLRField, BChainField + 4
-.set	MSRField,    NextLRField + 4
-.set	PCField,     MSRField    + 4
-.set	LRField,     PCField     + 4
-.set	CTRField,    LRField     + 4
-.set	XERField,    CTRField    + 4
-.set	CRField,     XERField    + 4
-.set	USPRG0Field, CRField     + 4
-.set	r0Field,     USPRG0Field + 4
-.set	r2Field,     r0Field     + 4
-.set	r3r31Field,  r2Field     + 4
-.set	IFrameSize,  r3r31Field  + ( ( 31 - 3 ) + 1 ) * 4
-
-
-.macro portSAVE_STACK_POINTER_AND_LR
-
-	# Get the address of the TCB.				
-	xor		R0, R0, R0
-	addis	R2, R0, pxCurrentTCB@ha
-	lwz		R2,	pxCurrentTCB@l( R2 )
-
-	# Store the stack pointer into the TCB
-	stw		SP,	0( R2 )
-
-	# Save the link register
-	stwu	R1, -24( R1 )
-	mflr	R0
-	stw		R31, 20( R1 )
-	stw		R0, 28( R1 )
-	mr		R31, r1
-
-.endm
-
-.macro portRESTORE_STACK_POINTER_AND_LR
-
-	# Restore the link register
-	lwz		R11, 0( R1 )
-	lwz		R0, 4( R11 )
-	mtlr	R0
-	lwz		R31, -4( R11 )
-	mr		R1, R11
-
-	# Get the address of the TCB.
-	xor		R0, R0, R0
-	addis   SP, R0, pxCurrentTCB@ha
-	lwz		SP,	pxCurrentTCB@l( R1 )
-
-	# Get the task stack pointer from the TCB.
-	lwz		SP, 0( SP )
-
-.endm
-
-
-vPortStartFirstTask:
-
-	# Get the address of the TCB.
-	xor		R0, R0, R0
-    addis   SP, R0, pxCurrentTCB@ha
-    lwz		SP,	pxCurrentTCB@l( SP )
-
-	# Get the task stack pointer from the TCB.
-	lwz		SP, 0( SP )
-	
-	# Restore MSR register to SRR1.
-	lwz		R0, MSRField(R1)
-	mtsrr1	R0
-	
-	# Restore current PC location to SRR0.
-	lwz		R0, PCField(R1)
-	mtsrr0	R0
-
-	# Save  USPRG0 register
-	lwz		R0, USPRG0Field(R1)
-	mtspr	0x100,R0
-	
-	# Restore Condition register
-	lwz		R0, CRField(R1)
-	mtcr	R0
-	
-	# Restore Fixed Point Exception register
-	lwz		R0, XERField(R1)
-	mtxer	R0
-	
-	# Restore Counter register
-	lwz		R0, CTRField(R1)
-	mtctr	R0
-	
-	# Restore Link register
-	lwz		R0, LRField(R1)
-	mtlr	R0
-	
-	# Restore remaining GPR registers.
-	lmw	R3,r3r31Field(R1)
-	
-	# Restore r0 and r2.
-	lwz		R0, r0Field(R1)
-	lwz		R2, r2Field(R1)
-	
-	# Remove frame from stack
-	addi	R1,R1,IFrameSize
-
-	# Return into the first task
-	rfi
-
-
-
-vPortYield:
-
-	portSAVE_STACK_POINTER_AND_LR
-	bl vTaskSwitchContext
-	portRESTORE_STACK_POINTER_AND_LR
-	blr
-
-vPortTickISR:
-
-	portSAVE_STACK_POINTER_AND_LR
-	bl vTaskIncrementTick
-	#if configUSE_PREEMPTION == 1
-		bl vTaskSwitchContext
-	#endif
-
-	# Clear the interrupt
-	lis		R0, 2048
-	mttsr	R0
-
-	portRESTORE_STACK_POINTER_AND_LR
-	blr
-
-vPortISRWrapper:
-
-	portSAVE_STACK_POINTER_AND_LR
-	bl vPortISRHandler
-	portRESTORE_STACK_POINTER_AND_LR
-	blr