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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Source/] [portable/] [GCC/] [MicroBlaze/] [portasm.s] - Blame information for rev 857

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        .extern pxCurrentTCB
        .extern vTaskISRHandler
        .extern vTaskSwitchContext
        .extern uxCriticalNesting
        .extern pulISRStack
 
        .global __FreeRTOS_interrupt_handler
        .global VPortYieldASM
        .global vStartFirstTask
 
 
.macro portSAVE_CONTEXT
        /* Make room for the context on the stack. */
        addik r1, r1, -132
        /* Save r31 so it can then be used. */
        swi r31, r1, 4
        /* Copy the msr into r31 - this is stacked later. */
        mfs r31, rmsr
        /* Stack general registers. */
        swi r30, r1, 12
        swi r29, r1, 16
        swi r28, r1, 20
        swi r27, r1, 24
        swi r26, r1, 28
        swi r25, r1, 32
        swi r24, r1, 36
        swi r23, r1, 40
        swi r22, r1, 44
        swi r21, r1, 48
        swi r20, r1, 52
        swi r19, r1, 56
        swi r18, r1, 60
        swi r17, r1, 64
        swi r16, r1, 68
        swi r15, r1, 72
        swi r13, r1, 80
        swi r12, r1, 84
        swi r11, r1, 88
        swi r10, r1, 92
        swi r9, r1, 96
        swi r8, r1, 100
        swi r7, r1, 104
        swi r6, r1, 108
        swi r5, r1, 112
        swi r4, r1, 116
        swi r3, r1, 120
        swi r2, r1, 124
        /* Stack the critical section nesting value. */
        lwi r3, r0, uxCriticalNesting
        swi r3, r1, 128
        /* Save the top of stack value to the TCB. */
        lwi r3, r0, pxCurrentTCB
        sw      r1, r0, r3
 
        .endm
 
.macro portRESTORE_CONTEXT
        /* Load the top of stack value from the TCB. */
        lwi r3, r0, pxCurrentTCB
        lw      r1, r0, r3
        /* Restore the general registers. */
        lwi r31, r1, 4
        lwi r30, r1, 12
        lwi r29, r1, 16
        lwi r28, r1, 20
        lwi r27, r1, 24
        lwi r26, r1, 28
        lwi r25, r1, 32
        lwi r24, r1, 36
        lwi r23, r1, 40
        lwi r22, r1, 44
        lwi r21, r1, 48
        lwi r20, r1, 52
        lwi r19, r1, 56
        lwi r18, r1, 60
        lwi r17, r1, 64
        lwi r16, r1, 68
        lwi r15, r1, 72
        lwi r14, r1, 76
        lwi r13, r1, 80
        lwi r12, r1, 84
        lwi r11, r1, 88
        lwi r10, r1, 92
        lwi r9, r1, 96
        lwi r8, r1, 100
        lwi r7, r1, 104
        lwi r6, r1, 108
        lwi r5, r1, 112
        lwi r4, r1, 116
        lwi r2, r1, 124
 
        /* Load the critical nesting value. */
        lwi r3, r1, 128
        swi r3, r0, uxCriticalNesting
 
        /* Obtain the MSR value from the stack. */
        lwi r3, r1, 8
 
        /* Are interrupts enabled in the MSR?  If so return using an return from
        interrupt instruction to ensure interrupts are enabled only once the task
        is running again. */
        andi r3, r3, 2
        beqid r3, 36
        or r0, r0, r0
 
        /* Reload the rmsr from the stack, clear the enable interrupt bit in the
        value before saving back to rmsr register, then return enabling interrupts
        as we return. */
        lwi r3, r1, 8
        andi r3, r3, ~2
        mts rmsr, r3
        lwi r3, r1, 120
        addik r1, r1, 132
        rtid r14, 0
        or r0, r0, r0
 
        /* Reload the rmsr from the stack, place it in the rmsr register, and
        return without enabling interrupts. */
        lwi r3, r1, 8
        mts rmsr, r3
        lwi r3, r1, 120
        addik r1, r1, 132
        rtsd r14, 0
        or r0, r0, r0
 
        .endm
 
        .text
        .align  2
 
 
__FreeRTOS_interrupt_handler:
        portSAVE_CONTEXT
        /* Entered via an interrupt so interrupts must be enabled in msr. */
        ori r31, r31, 2
        /* Stack msr. */
        swi r31, r1, 8
        /* Stack the return address.  As we entered via an interrupt we do
        not need to modify the return address prior to stacking. */
        swi r14, r1, 76
        /* Now switch to use the ISR stack. */
        lwi r3, r0, pulISRStack
        add r1, r3, r0
        bralid r15, vTaskISRHandler
        or r0, r0, r0
        portRESTORE_CONTEXT
 
 
VPortYieldASM:
        portSAVE_CONTEXT
        /* Stack msr. */
        swi r31, r1, 8
        /* Modify the return address so we return to the instruction after the
        exception. */
        addi r14, r14, 8
        swi r14, r1, 76
        /* Now switch to use the ISR stack. */
        lwi r3, r0, pulISRStack
        add r1, r3, r0
        bralid r15, vTaskSwitchContext
        or r0, r0, r0
        portRESTORE_CONTEXT
 
vStartFirstTask:
        portRESTORE_CONTEXT
 
 
 
 
 
 

Line No.	Rev	Author	Line
1	572	jeremybenn	`.extern pxCurrentTCB`
2			`.extern vTaskISRHandler`
3			`.extern vTaskSwitchContext`
4			`.extern uxCriticalNesting`
5			`.extern pulISRStack`
6
7			`.global __FreeRTOS_interrupt_handler`
8			`.global VPortYieldASM`
9			`.global vStartFirstTask`
10
11
12			`.macro portSAVE_CONTEXT`
13			`/* Make room for the context on the stack. */`
14			`addik r1, r1, -132`
15			`/* Save r31 so it can then be used. */`
16			`swi r31, r1, 4`
17			`/* Copy the msr into r31 - this is stacked later. */`
18			`mfs r31, rmsr`
19			`/* Stack general registers. */`
20			`swi r30, r1, 12`
21			`swi r29, r1, 16`
22			`swi r28, r1, 20`
23			`swi r27, r1, 24`
24			`swi r26, r1, 28`
25			`swi r25, r1, 32`
26			`swi r24, r1, 36`
27			`swi r23, r1, 40`
28			`swi r22, r1, 44`
29			`swi r21, r1, 48`
30			`swi r20, r1, 52`
31			`swi r19, r1, 56`
32			`swi r18, r1, 60`
33			`swi r17, r1, 64`
34			`swi r16, r1, 68`
35			`swi r15, r1, 72`
36			`swi r13, r1, 80`
37			`swi r12, r1, 84`
38			`swi r11, r1, 88`
39			`swi r10, r1, 92`
40			`swi r9, r1, 96`
41			`swi r8, r1, 100`
42			`swi r7, r1, 104`
43			`swi r6, r1, 108`
44			`swi r5, r1, 112`
45			`swi r4, r1, 116`
46			`swi r3, r1, 120`
47			`swi r2, r1, 124`
48			`/* Stack the critical section nesting value. */`
49			`lwi r3, r0, uxCriticalNesting`
50			`swi r3, r1, 128`
51			`/* Save the top of stack value to the TCB. */`
52			`lwi r3, r0, pxCurrentTCB`
53			`sw r1, r0, r3`
54
55			`.endm`
56
57			`.macro portRESTORE_CONTEXT`
58			`/* Load the top of stack value from the TCB. */`
59			`lwi r3, r0, pxCurrentTCB`
60			`lw r1, r0, r3`
61			`/* Restore the general registers. */`
62			`lwi r31, r1, 4`
63			`lwi r30, r1, 12`
64			`lwi r29, r1, 16`
65			`lwi r28, r1, 20`
66			`lwi r27, r1, 24`
67			`lwi r26, r1, 28`
68			`lwi r25, r1, 32`
69			`lwi r24, r1, 36`
70			`lwi r23, r1, 40`
71			`lwi r22, r1, 44`
72			`lwi r21, r1, 48`
73			`lwi r20, r1, 52`
74			`lwi r19, r1, 56`
75			`lwi r18, r1, 60`
76			`lwi r17, r1, 64`
77			`lwi r16, r1, 68`
78			`lwi r15, r1, 72`
79			`lwi r14, r1, 76`
80			`lwi r13, r1, 80`
81			`lwi r12, r1, 84`
82			`lwi r11, r1, 88`
83			`lwi r10, r1, 92`
84			`lwi r9, r1, 96`
85			`lwi r8, r1, 100`
86			`lwi r7, r1, 104`
87			`lwi r6, r1, 108`
88			`lwi r5, r1, 112`
89			`lwi r4, r1, 116`
90			`lwi r2, r1, 124`
91
92			`/* Load the critical nesting value. */`
93			`lwi r3, r1, 128`
94			`swi r3, r0, uxCriticalNesting`
95
96			`/* Obtain the MSR value from the stack. */`
97			`lwi r3, r1, 8`
98
99			`/* Are interrupts enabled in the MSR? If so return using an return from`
100			`interrupt instruction to ensure interrupts are enabled only once the task`
101			`is running again. */`
102			`andi r3, r3, 2`
103			`beqid r3, 36`
104			`or r0, r0, r0`
105
106			`/* Reload the rmsr from the stack, clear the enable interrupt bit in the`
107			`value before saving back to rmsr register, then return enabling interrupts`
108			`as we return. */`
109			`lwi r3, r1, 8`
110			`andi r3, r3, ~2`
111			`mts rmsr, r3`
112			`lwi r3, r1, 120`
113			`addik r1, r1, 132`
114			`rtid r14, 0`
115			`or r0, r0, r0`
116
117			`/* Reload the rmsr from the stack, place it in the rmsr register, and`
118			`return without enabling interrupts. */`
119			`lwi r3, r1, 8`
120			`mts rmsr, r3`
121			`lwi r3, r1, 120`
122			`addik r1, r1, 132`
123			`rtsd r14, 0`
124			`or r0, r0, r0`
125
126			`.endm`
127
128			`.text`
129			`.align 2`
130
131
132			`__FreeRTOS_interrupt_handler:`
133			`portSAVE_CONTEXT`
134			`/* Entered via an interrupt so interrupts must be enabled in msr. */`
135			`ori r31, r31, 2`
136			`/* Stack msr. */`
137			`swi r31, r1, 8`
138			`/* Stack the return address. As we entered via an interrupt we do`
139			`not need to modify the return address prior to stacking. */`
140			`swi r14, r1, 76`
141			`/* Now switch to use the ISR stack. */`
142			`lwi r3, r0, pulISRStack`
143			`add r1, r3, r0`
144			`bralid r15, vTaskISRHandler`
145			`or r0, r0, r0`
146			`portRESTORE_CONTEXT`
147
148
149			`VPortYieldASM:`
150			`portSAVE_CONTEXT`
151			`/* Stack msr. */`
152			`swi r31, r1, 8`
153			`/* Modify the return address so we return to the instruction after the`
154			`exception. */`
155			`addi r14, r14, 8`
156			`swi r14, r1, 76`
157			`/* Now switch to use the ISR stack. */`
158			`lwi r3, r0, pulISRStack`
159			`add r1, r3, r0`
160			`bralid r15, vTaskSwitchContext`
161			`or r0, r0, r0`
162			`portRESTORE_CONTEXT`
163
164			`vStartFirstTask:`
165			`portRESTORE_CONTEXT`
166
167
168
169
170
171

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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Source/] [portable/] [GCC/] [MicroBlaze/] [portasm.s] - Blame information for rev 857