Add list of interrupts to PLIC documentation

doc/ip/plic.md

@@ -5,9 +5,35 @@ Please find more details in [the official specification](https://github.com/risc
 Part of these details are is the memory map, which shows all registers from the `base` until `base + 0x3FFFFFC`.
 Not all of these registers are mapped, most importantly we only have one core, so only one context (context 0).
 
-In terms of interrupts, the exact mapping of sources to interrupts will be published here at a later point.
-There are a number of considerations.
+The following table shows the current list of interrupts that are fed through the PLIC.
+For more detailed descriptions of what each interrupt means, please refer to the documentation of each individual hardware IP block.
+More interrupts may be added to this table in the future.
+
+| Number | Block     | Interrupt description |
+|--------|-----------|-----------------------|
+|  0     | None      | Tied to zero
+|  1,  9 | UART 0, 1 | Transmit watermark
+|  2, 10 | UART 0, 1 | Receive watermark
+|  3, 11 | UART 0, 1 | Transmit empty
+|  4, 12 | UART 0, 1 | Receive overflow
+|  5, 13 | UART 0, 1 | Receive frame error
+|  6, 14 | UART 0, 1 | Receive break error
+|  7, 15 | UART 0, 1 | Receive timeout
+|  8, 16 | UART 0, 1 | Receive parity error
+| 17, 32 | I2C 0, 1  | Format FIFO threshold
+| 18, 33 | I2C 0, 1  | Receive FIFO threshold
+| 19, 34 | I2C 0, 1  | Acquire FIFO threshold
+| 20, 35 | I2C 0, 1  | Receive FIFO overflow
+| 21, 36 | I2C 0, 1  | Received NACK
+| 22, 37 | I2C 0, 1  | SCL interference
+| 23, 38 | I2C 0, 1  | SDA interference
+| 24, 39 | I2C 0, 1  | Stretch timeout
+| 25, 40 | I2C 0, 1  | SDA unstable
+| 26, 41 | I2C 0, 1  | Command complete
+| 27, 42 | I2C 0, 1  | Transmit stretch
+| 28, 43 | I2C 0, 1  | Transmit threshold
+| 29, 44 | I2C 0, 1  | Acquire FIFO full
+| 30, 45 | I2C 0, 1  | Unexpected stop
+| 31, 46 | I2C 0, 1  | Host timeout
+| 47     | Ethernet  | Packet ready to read via the SPI connected to the ethernet chip
 
-- The following blocks have interrupts: timer, UART, I2C, SPI, ...
-- There are multiple UART, I2C and SPI blocks in the system.
-- Some blocks have multiple interrupts.