os_cpu_reg_a.s

uc_os II__PIC24fj128ga010

;
;*******************************************************************************************
; 											uC/OS-II
; 									 The Real-Time Kernel
;
; 				           (c) Copyright 2006, Micrium, Weston, FL
; 									 All Rights Reserved
;
;
;                                 PIC24FJ128GA010 MPLab Port
;
;
; File : os_cpu_regs_a.s
; By : 不负责任的天使(^_^)
; Port Version : V2.51       
;*******************************************************************************************
;										INCLUDE
;
;.include  "P24FJ128GA010.inc"

;
;*******************************************************************************************
;                                  MACRO OS_REGS_SAVE
;
; Description : This macro saves the current state of the CPU onto the current tasks stack
;
; Notes : W15 is the CPU stack pointer. It should never be pushed from the stack during
;         a context save.
;*******************************************************************************************
;
.macro OS_REGS_SAVE ; Start of Macro
push.d w0  					 	; Push W0 and W1onto the stack
push.d w2 						; Push W2 and W3onto the stack
push.d w4 						; Push W4 and W5onto the stack
push.d w6 						; Push W6 and W7onto the stack
push.d w8 						; Push W8 and W9onto the stack
push.d w10 						; Push W10 and W11onto the stack
push.d w12 						; Push W12 and W13onto the stack
push w14 						; Push W14 **ONLY**onto the stack
push TBLPAG 					; Push the Table PageRegister onto the stack
push PSVPAG 					; Push the Program Space Visibility Register onto the stack
push RCOUNT 					; Push the Repeat Loop Counter Register onto the stack
push SR 						; Push the CPU StatusRegister onto the stack
push CORCON 					; Push the Core Control Register onto the stack
.endm 						    ; End of Macro
;
;*******************************************************************************************
;																 MACRO OS_REGS_RESTORE
;
; Description : This macro restores the current state of the CPU from the current tasks stack
;
; Notes : 1) W15 is the CPU stack pointer. It should never be popped from the stack during
; 					 a context restore.
; 				2) Registers are always popped in the reverse order from which they were pushed
;*******************************************************************************************
;
.macro OS_REGS_RESTORE            ; Start of Macro
pop CORCON 											 	; Pull the CoreControl Register from the stack
pop SR 													; Pull the CPU StatusRegister from the stack
pop RCOUNT 												; Pull the Repeat LoopCounter Register from the stack
pop PSVPAG 												; Pull the ProgramSpace Visibility Register from the stack
pop TBLPAG 												; Pull the Table PageRegister from the stack
pop.d w14 												; Pull W14 **ONLY** from the stack
pop.d w12												; Pull W12 and W13 from the stack
pop.d w10												; Pull W10 and W11 from the stack
pop.d w8												; Pull W8 and W9 from the stack
pop.d w6 												; Pull W6 and W7 from the stack
pop.d w4 												; Pull W4 and W5 from the stack
pop.d w2 												; Pull W2 and W3 from the stack
pop w0 												; Pull W0 and W1 from the stack
.endm 													; End of Macro