ARM11 Interrupts
Interrupts
Interrupt priority is 0-0xF
Private Interrupts
Each CPU core has 32 software interrupts that are private and belong to that core. These interrupts are numbers 0-0x1F for each core. The hardware interrupts are not core-specific and start at interrupt ID 0x20.
IRQ | Listener | Description |
---|---|---|
0-0x5 | MPCore software-interrupt. | |
0x6 | Kernel | MPCore software-interrupt. |
0x7 | MPCore software-interrupt. | |
0x8 | Kernel | MPCore software-interrupt. Used for scheduling. |
0x9-0xF | MPCore software-interrupt. | |
0x1D | Kernel | MPCore timer. |
0x1E | Kernel | MPCore watchdog. |
Hardware Interrupts
There are 0x60 hardware interrupts starting at 0x20 and continuing up to 0x7F. These are not private and are accessible from any core.
IRQ | Listener | Description |
---|---|---|
0x28 | gsp, TwlBg | ? |
0x29 | gsp, TwlBg | ? |
0x2A | gsp, TwlBg | ? |
0x2B | gsp, TwlBg | ? |
0x2C | gsp, TwlBg | ? |
0x2D | gsp, TwlBg | ? |
0x30 | Kernel | ? |
0x39 | Kernel | DMA |
0x3A | Kernel | DMA |
0x3B | Kernel | DMA |
0x40 | nwm | WIFI SDIO Controller @ 0x10122000 |
0x41 | nwm | ? |
0x42 | nwm_dev? | WIFI SDIO Controller @ 0x10100000 |
0x45 | mvd (New3DS) | ? |
0x46 | mvd (New3DS) | ? |
0x48 | camera | ? |
0x49 | camera | ? |
0x4A | dsp | ? |
0x4B | camera | Y2R Conversion Finished |
0x4C | TwlBg | ? |
0x4D | TwlBg | ? |
0x4E | mvd (New3DS) | ? |
0x4F | mvd (New3DS) | ? |
0x50 | pxi, TwlBg | ? |
0x51 | pxi, TwlBg | ? |
0x52 | pxi, TwlBg | Send Fifo Empty |
0x53 | pxi, TwlBg | Receive Fifo Not Empty |
0x54 | i2c, TwlBg | ? |
0x55 | i2c, TwlBg | ? |
0x56 | spi, TwlBg | ? |
0x57 | spi, TwlBg | ? |
0x58 | Kernel | ? |
0x59 | TwlBg | ? |
0x5A | mic | ? |
0x5C | i2c, TwlBg | ? |
0x60 | gpio, TwlBg | ? |
0x62 | gpio, TwlBg | ? |
0x63 | gpio, TwlBg | ? |
0x64 | gpio, TwlBg | ? |
0x66 | gpio, TwlBg | ? |
0x68 | gpio, TwlBg | ? |
0x69 | gpio, TwlBg | ? |
0x6A | gpio, TwlBg | ? |
0x6B | gpio, TwlBg | ? |
0x6C | gpio, TwlBg | ? |
0x6D | gpio, TwlBg | ? |
0x6E | gpio, TwlBg | ? |
0x6F | gpio, TwlBg | ? |
0x70 | gpio, TwlBg | ? |
0x71 | gpio, TwlBg | ? |
0x72 | gpio, TwlBg | ? |
0x73 | TwlBg | ? |
There are 2 tables in the ARM11 kernel: the first has 32 * 2(or 32 * 4) 8-byte entries. This table is for the private interrupts that belong to each core. The data for each interrupt can be found by doing table_base + (core_num * 0x100) + (intr_num * 8). The second table is for public hardware interrupts and the data for each interrupt can be retrieved by doing table_base + (intr_num * 8).