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DMA Programming Model
MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
16-43
In DIMR, each bit corresponds to an interrupt request bit in the DSTR. When a bit is set, it
enables the generation of an interrupt request to the LICs (Local Interrupt Controllers). All bits
are cleared at reset and it is your responsibility to enable a channel interrupt request.
In DEMR, each bit corresponds to an interrupt request bit in the DSTR. When a bit is set, it
enables the generation of an interrupt request to the GIC. This interrupt is processed by the
external host. DEMR is cleared at reset and it is your responsibility to enable a channel interrupt
request.
Note:
Interrupts should be enabled either by DIMR or DEMR to avoid undefined system
behavior.
16.4.3 Bus Error Registers
If a system bus or a local bus error occurs on a DMA access, a non-maskable interrupt is routed to
the SC140 core interrupt controller, and the DMA TEA Status Register (DTEAR) is updated. The
interrupt service routine reads the appropriate DMA Transfer Error Address Register, PDMTEA
for the system bus or LDMTEA for the local bus to determine the address on the bus where the
error occurred. The channel that caused the bus error can be identified by reading the request
number from the DMA Transfer Error Requestor Number Register, PDMTER for the system bus
or LDMTER for the local bus. When a bus error occurs on a DMA transaction, all DMA activity
related to the appropriate bus stops immediately. The DCHCR[ACTV] bit is deasserted by the
hardware for all channels configured to service the other bus, guaranteeing memory coherency.
The registers associated with bus errors are described in the sections that follow.
DIMR
DMA Internal Mask Register
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M0
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
M11
M12
M13
M14
M15
Type
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
—
Type
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
DEMR
DMA External Mask Register
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
M0
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
M11
M12
M13
M14
M15
Type
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
—
Type
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Содержание MSC8113
Страница 1: ...MSC8113 Reference Manual Tri Core 16 Bit Digital Signal Processor MSC8113RM Rev 0 May 2008 ...
Страница 20: ...MSC8113 Reference Manual Rev 0 xx Freescale Semiconductor Contents ...
Страница 28: ...MSC8113 Reference Manual Rev 0 xxviii Freescale Semiconductor ...
Страница 56: ...MSC8113 Reference Manual Rev 0 1 28 Freescale Semiconductor MSC8113 Overview ...
Страница 76: ...MSC8113 Reference Manual Rev 0 2 20 Freescale Semiconductor SC140 Core Overview ...
Страница 134: ...MSC8113 Reference Manual Rev 0 4 30 Freescale Semiconductor System Interface Unit SIU ...
Страница 168: ...MSC8113 Reference Manual Rev 0 6 18 Freescale Semiconductor Boot Program ...
Страница 180: ...MSC8113 Reference Manual Rev 0 7 12 Freescale Semiconductor Clocks ...
Страница 260: ...MSC8113 Reference Manual Rev 0 8 80 Freescale Semiconductor Memory Map ...
Страница 300: ...MSC8113 Reference Manual Rev 0 9 40 Freescale Semiconductor Extended Core ...
Страница 304: ...MSC8113 Reference Manual Rev 0 10 4 Freescale Semiconductor MQBus and M2 Memory ...
Страница 308: ...MSC8113 Reference Manual Rev 0 11 4 Freescale Semiconductor SQBus ...
Страница 544: ...MSC8113 Reference Manual Rev 0 16 46 Freescale Semiconductor Direct Memory Access DMA Controller ...
Страница 590: ...MSC8113 Reference Manual Rev 0 17 46 Freescale Semiconductor Interrupt Processing ...
Страница 614: ...MSC8113 Reference Manual Rev 0 18 24 Freescale Semiconductor Debugging ...
Страница 622: ...MSC8113 Reference Manual Rev 0 19 8 Freescale Semiconductor Internal Peripheral Bus IPBus ...
Страница 724: ...MSC8113 Reference Manual Rev 0 21 32 Freescale Semiconductor UART ...
Страница 920: ...MSC8113 Reference Manual Rev 0 25 150 Freescale Semiconductor Ethernet Controller ...
Страница 1171: ...MSC8113 Reference Manual Rev 0 Freescale Semiconductor C 61 EF wait_rts P 01077FFC 9F rts 71 ...
Страница 1172: ...MSC8113 Reference Manual Rev 0 C 62 Freescale Semiconductor MSC8113 Boot Code ...
Страница 1202: ...MSC8113 Reference Manual Rev 0 Index 30 Freescale Semiconductor Index ...