2 FreeRTOS V6.0.1 - Copyright (C) 2009 Real Time Engineers Ltd.
\r
4 ***************************************************************************
\r
8 * + New to FreeRTOS, *
\r
9 * + Wanting to learn FreeRTOS or multitasking in general quickly *
\r
10 * + Looking for basic training, *
\r
11 * + Wanting to improve your FreeRTOS skills and productivity *
\r
13 * then take a look at the FreeRTOS eBook *
\r
15 * "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
\r
16 * http://www.FreeRTOS.org/Documentation *
\r
18 * A pdf reference manual is also available. Both are usually delivered *
\r
19 * to your inbox within 20 minutes to two hours when purchased between 8am *
\r
20 * and 8pm GMT (although please allow up to 24 hours in case of *
\r
21 * exceptional circumstances). Thank you for your support! *
\r
23 ***************************************************************************
\r
25 This file is part of the FreeRTOS distribution.
\r
27 FreeRTOS is free software; you can redistribute it and/or modify it under
\r
28 the terms of the GNU General Public License (version 2) as published by the
\r
29 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
\r
30 ***NOTE*** The exception to the GPL is included to allow you to distribute
\r
31 a combined work that includes FreeRTOS without being obliged to provide the
\r
32 source code for proprietary components outside of the FreeRTOS kernel.
\r
33 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
\r
34 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
\r
35 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
\r
36 more details. You should have received a copy of the GNU General Public
\r
37 License and the FreeRTOS license exception along with FreeRTOS; if not it
\r
38 can be viewed here: http://www.freertos.org/a00114.html and also obtained
\r
39 by writing to Richard Barry, contact details for whom are available on the
\r
44 http://www.FreeRTOS.org - Documentation, latest information, license and
\r
47 http://www.SafeRTOS.com - A version that is certified for use in safety
\r
50 http://www.OpenRTOS.com - Commercial support, development, porting,
\r
51 licensing and training services.
\r
55 * Purpose: Lowest level routines for all ColdFire processors.
\r
59 * ulPortSetIPL() and mcf5xxx_wr_cacr() copied with permission from FreeScale
\r
60 * supplied source files.
\r
63 .global ulPortSetIPL
\r
64 .global mcf5xxx_wr_cacr
\r
65 .global __cs3_isr_interrupt_80
\r
66 .global vPortStartFirstTask
\r
70 .macro portSAVE_CONTEXT
\r
72 lea.l (-60, %sp), %sp
\r
73 movem.l %d0-%fp, (%sp)
\r
74 move.l pxCurrentTCB, %a0
\r
79 .macro portRESTORE_CONTEXT
\r
81 move.l pxCurrentTCB, %a0
\r
83 movem.l (%sp), %d0-%fp
\r
89 /********************************************************************/
\r
91 * This routines changes the IPL to the value passed into the routine.
\r
92 * It also returns the old IPL value back.
\r
93 * Calling convention from C:
\r
94 * old_ipl = asm_set_ipl(new_ipl);
\r
95 * For the Diab Data C compiler, it passes return value thru D0.
\r
96 * Note that only the least significant three bits of the passed
\r
104 move.w SR,D7 /* current sr */
\r
106 move.l D7,D0 /* prepare return value */
\r
107 andi.l #0x0700,D0 /* mask out IPL */
\r
108 lsr.l #8,D0 /* IPL */
\r
110 move.l 8(A6),D6 /* get argument */
\r
111 andi.l #0x07,D6 /* least significant three bits */
\r
112 lsl.l #8,D6 /* move over to make mask */
\r
114 andi.l #0x0000F8FF,D7 /* zero out current IPL */
\r
115 or.l D6,D7 /* place new IPL in sr */
\r
122 /********************************************************************/
\r
126 .long 0x4e7b0002 /* movec d0,cacr */
\r
130 /********************************************************************/
\r
132 /* Yield interrupt. */
\r
133 __cs3_isr_interrupt_80:
\r
135 jsr vPortYieldHandler
\r
136 portRESTORE_CONTEXT
\r
138 /********************************************************************/
\r
141 vPortStartFirstTask:
\r
142 portRESTORE_CONTEXT
\r