4 * C64X+ Core Interrupt Controller
6 The core interrupt controller provides 16 prioritized interrupts to the
7 C64X+ core. Priority 0 and 1 are used for reset and NMI respectively.
8 Priority 2 and 3 are reserved. Priority 4-15 are used for interrupt
9 sources coming from outside the core.
13 - compatible: Should be "ti,c64x+core-pic";
14 - #interrupt-cells: <1>
16 Interrupt Specifier Definition
17 ------------------------------
18 Single cell specifying the core interrupt priority level (4-15) where
19 4 is highest priority and 15 is lowest priority.
23 core_pic: interrupt-controller@0 {
25 #interrupt-cells = <1>;
26 compatible = "ti,c64x+core-pic";
31 * C64x+ Megamodule Interrupt Controller
33 The megamodule PIC consists of four interrupt mupliplexers each of which
34 combine up to 32 interrupt inputs into a single interrupt output which
35 may be cascaded into the core interrupt controller. The megamodule PIC
36 has a total of 12 outputs cascading into the core interrupt controller.
37 One for each core interrupt priority level. In addition to the combined
38 interrupt sources, individual megamodule interrupts may be cascaded to
39 the core interrupt controller. When an individual interrupt is cascaded,
40 it is no longer handled through a megamodule interrupt combiner and is
41 considered to have the core interrupt controller as the parent.
45 - compatible: "ti,c64x+megamod-pic"
46 - interrupt-controller
47 - #interrupt-cells: <1>
48 - reg: base address and size of register area
49 - interrupts: This should have four cells; one for each interrupt combiner.
50 The cells contain the core priority interrupt to which the
51 corresponding combiner output is wired.
55 - ti,c64x+megamod-pic-mux: Array of 12 cells correspnding to the 12 core
56 priority interrupts. The first cell corresponds to
57 core priority 4 and the last cell corresponds to
58 core priority 15. The value of each cell is the
59 megamodule interrupt source which is MUXed to
60 the core interrupt corresponding to the cell
61 position. Allowed values are 4 - 127. Mapping for
62 interrupts 0 - 3 (combined interrupt sources) are
65 Interrupt Specifier Definition
66 ------------------------------
67 Single cell specifying the megamodule interrupt source (4-127). Note that
68 interrupts mapped directly to the core with "ti,c64x+megamod-pic-mux" will
69 use the core interrupt controller as their parent and the specifier will
70 be the core priority level, not the megamodule interrupt number.
74 megamod_pic: interrupt-controller@1800000 {
75 compatible = "ti,c64x+megamod-pic";
77 #interrupt-cells = <1>;
78 reg = <0x1800000 0x1000>;
79 interrupt-parent = <&core_pic>;
80 interrupts = < 12 13 14 15 >;
83 This is a minimal example where all individual interrupts go through a
84 combiner. Combiner-0 is mapped to core interrupt 12, combiner-1 is mapped
88 megamod_pic: interrupt-controller@1800000 {
89 compatible = "ti,c64x+megamod-pic";
91 #interrupt-cells = <1>;
92 reg = <0x1800000 0x1000>;
93 interrupt-parent = <&core_pic>;
94 interrupts = < 12 13 14 15 >;
95 ti,c64x+megamod-pic-mux = < 0 0 0 0
100 This the same as the first example except that megamodule interrupt 32 is
101 mapped directly to core priority interrupt 8. The node using this interrupt
102 must set the core controller as its interrupt parent and use 8 in the
103 interrupt specifier value.