| =========================== |
| ASPEED Interrupt Controller |
| =========================== |
| |
| AST2700 |
| ------- |
| There are a total of 480 interrupt sources in AST2700. Due to the limitation of |
| interrupt numbers of processors, the interrupts are merged every 32 sources for |
| interrupt numbers greater than 127. |
| |
| There are two levels of interrupt controllers, INTC (CPU Die) and INTCIO |
| (I/O Die). |
| |
| Interrupt Mapping |
| ----------------- |
| - INTC: Handles interrupt sources 0 - 127 and integrates signals from INTCIO. |
| - INTCIO: Handles interrupt sources 128 - 319 independently. |
| |
| QEMU Support |
| ------------ |
| Currently, only GIC 192 to 201 are supported, and their source interrupts are |
| from INTCIO and connected to INTC at input pin 0 and output pins 0 to 9 for |
| GIC 192-201. |
| |
| Design for GICINT 196 |
| --------------------- |
| The orgate has interrupt sources ranging from 0 to 31, with its output pin |
| connected to INTCIO "T0 GICINT_196". The output pin is then connected to INTC |
| "GIC_192_201" at bit 4, and its bit 4 output pin is connected to GIC 196. |
| |
| INTC GIC_192_201 Output Pin Mapping |
| ----------------------------------- |
| The design of INTC GIC_192_201 have 10 output pins, mapped as following: |
| |
| ==== ==== |
| Bit GIC |
| ==== ==== |
| 0 192 |
| 1 193 |
| 2 194 |
| 3 195 |
| 4 196 |
| 5 197 |
| 6 198 |
| 7 199 |
| 8 200 |
| 9 201 |
| ==== ==== |
| |
| AST2700 A0 |
| ---------- |
| It has only one INTC controller, and currently, only GIC 128-136 is supported. |
| To support both AST2700 A1 and AST2700 A0, there are 10 OR gates in the INTC, |
| with gates 1 to 9 supporting GIC 128-136. |
| |
| Design for GICINT 132 |
| --------------------- |
| The orgate has interrupt sources ranging from 0 to 31, with its output pin |
| connected to INTC. The output pin is then connected to GIC 132. |
| |
| Block Diagram of GICINT 196 for AST2700 A1 and GICINT 132 for AST2700 A0 |
| ------------------------------------------------------------------------ |
| |
| .. code-block:: |
| |
| |-------------------------------------------------------------------------------------------------------| |
| | AST2700 A1 Design | |
| | To GICINT196 | |
| | | |
| | ETH1 |-----------| |--------------------------| |--------------| | |
| | -------->|0 | | INTCIO | | orgates[0] | | |
| | ETH2 | 4| orgates[0]------>|inpin[0]-------->outpin[0]|------->| 0 | | |
| | -------->|1 5| orgates[1]------>|inpin[1]-------->outpin[1]|------->| 1 | | |
| | ETH3 | 6| orgates[2]------>|inpin[2]-------->outpin[2]|------->| 2 | | |
| | -------->|2 19| orgates[3]------>|inpin[3]-------->outpin[3]|------->| 3 OR[0:9] |-----| | |
| | UART0 | 20|-->orgates[4]------>|inpin[4]-------->outpin[4]|------->| 4 | | | |
| | -------->|7 21| orgates[5]------>|inpin[5]-------->outpin[5]|------->| 5 | | | |
| | UART1 | 22| orgates[6]------>|inpin[6]-------->outpin[6]|------->| 6 | | | |
| | -------->|8 23| orgates[7]------>|inpin[7]-------->outpin[7]|------->| 7 | | | |
| | UART2 | 24| orgates[8]------>|inpin[8]-------->outpin[8]|------->| 8 | | | |
| | -------->|9 25| orgates[9]------>|inpin[9]-------->outpin[9]|------->| 9 | | | |
| | UART3 | 26| |--------------------------| |--------------| | | |
| | ---------|10 27| | | |
| | UART5 | 28| | | |
| | -------->|11 29| | | |
| | UART6 | | | | |
| | -------->|12 30| |-----------------------------------------------------------------------| | |
| | UART7 | 31| | | |
| | -------->|13 | | | |
| | UART8 | OR[0:31] | | |------------------------------| |----------| | |
| | -------->|14 | | | INTC | | GIC | | |
| | UART9 | | | |inpin[0:0]--------->outpin[0] |---------->|192 | | |
| | -------->|15 | | |inpin[0:1]--------->outpin[1] |---------->|193 | | |
| | UART10 | | | |inpin[0:2]--------->outpin[2] |---------->|194 | | |
| | -------->|16 | | |inpin[0:3]--------->outpin[3] |---------->|195 | | |
| | UART11 | | |--------------> |inpin[0:4]--------->outpin[4] |---------->|196 | | |
| | -------->|17 | |inpin[0:5]--------->outpin[5] |---------->|197 | | |
| | UART12 | | |inpin[0:6]--------->outpin[6] |---------->|198 | | |
| | -------->|18 | |inpin[0:7]--------->outpin[7] |---------->|199 | | |
| | |-----------| |inpin[0:8]--------->outpin[8] |---------->|200 | | |
| | |inpin[0:9]--------->outpin[9] |---------->|201 | | |
| |-------------------------------------------------------------------------------------------------------| |
| |-------------------------------------------------------------------------------------------------------| |
| | ETH1 |-----------| orgates[1]------->|inpin[1]----------->outpin[10]|---------->|128 | | |
| | -------->|0 | orgates[2]------->|inpin[2]----------->outpin[11]|---------->|129 | | |
| | ETH2 | 4| orgates[3]------->|inpin[3]----------->outpin[12]|---------->|130 | | |
| | -------->|1 5| orgates[4]------->|inpin[4]----------->outpin[13]|---------->|131 | | |
| | ETH3 | 6|---->orgates[5]------->|inpin[5]----------->outpin[14]|---------->|132 | | |
| | -------->|2 19| orgates[6]------->|inpin[6]----------->outpin[15]|---------->|133 | | |
| | UART0 | 20| orgates[7]------->|inpin[7]----------->outpin[16]|---------->|134 | | |
| | -------->|7 21| orgates[8]------->|inpin[8]----------->outpin[17]|---------->|135 | | |
| | UART1 | 22| orgates[9]------->|inpin[9]----------->outpin[18]|---------->|136 | | |
| | -------->|8 23| |------------------------------| |----------| | |
| | UART2 | 24| | |
| | -------->|9 25| AST2700 A0 Design | |
| | UART3 | 26| | |
| | -------->|10 27| | |
| | UART5 | 28| | |
| | -------->|11 29| GICINT132 | |
| | UART6 | | | |
| | -------->|12 30| | |
| | UART7 | 31| | |
| | -------->|13 | | |
| | UART8 | OR[0:31] | | |
| | -------->|14 | | |
| | UART9 | | | |
| | -------->|15 | | |
| | UART10 | | | |
| | -------->|16 | | |
| | UART11 | | | |
| | -------->|17 | | |
| | UART12 | | | |
| | -------->|18 | | |
| | |-----------| | |
| | | |
| |-------------------------------------------------------------------------------------------------------| |
