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ARM11 Interrupts: Difference between revisions

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Clarify PDC interrupt use
 
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Line 14: Line 14:
| 0
| 0
|  
|  
| MPCore software-interrupt. Not configured.
| MPCore software-interrupt. Used by Kernel11 to sync cores in crt0.
|-
| 0x1
|
| MPCore software-interrupt. Used by BOOT11 to kickstart Core1.
|-
|-
| 0x2-0x3
| 0x1-0x3
|  
|  
| MPCore software-interrupt. Seem to be unused.
| MPCore software-interrupt. Used by Boot11 and Kernel11 to kickstart Core1/2/3, and by Kernel11 to sync cores in crt0.
|-
|-
| 0x4
| 0x4
| Kernel
| Kernel
| MPCore software-interrupt. Used to manage the performance counter.
| MPCore software-interrupt. Used to manage the performance counter. Also used by Kernel11 during crt0 to sync up.
|-
|-
| 0x5
| 0x5
Line 92: Line 88:
| 0x2A
| 0x2A
| gsp, TwlBg
| gsp, TwlBg
| PDC0 (VBlank0)
| PDC0 (Top screen VBlank0, HBlank0)
|-
|-
| 0x2B
| 0x2B
| gsp, TwlBg
| gsp, TwlBg
| PDC1 (VBlank1)
| PDC1 (Bottom screen VBlank1, HBlank1)
|-
|-
| 0x2C
| 0x2C
Line 216: Line 212:
| 0x58
| 0x58
| Kernel
| Kernel
| PDN Wake Event
| PDN (wake event or SoC mode changed)
|-
|-
| 0x59
| 0x59
Line 225: Line 221:
| mic
| mic
| General microphone interrupt (?)
| General microphone interrupt (?)
|-
| 0x5B
| -
| [[HID_Registers#HID_PAD_CNT|HID_PAD_CNT]]
|-
|-
| 0x5C
| 0x5C
Line 236: Line 236:
| 0x60
| 0x60
| gpio, TwlBg
| gpio, TwlBg
| Shell opened
| Shell opened (GPIO1_2 falling edge)
|-
|-
| 0x62
| 0x62
| gpio, TwlBg
| gpio, TwlBg
| Shell closed
| Shell closed (GPIO1_2 rising edge)
|-
|-
| 0x63
| 0x63
| gpio, TwlBg
| gpio, TwlBg
| Touchscreen Pen Down
| Touch Screen pressed (GPIO1_1 falling edge)
|-
|-
| 0x64
| 0x64
| gpio, TwlBg
| gpio, TwlBg
| Headphone jack plugged in/out
| Headphones inserted (GPIO2_0)
|-
|-
| 0x66
| 0x66
| gpio, TwlBg
| gpio, TwlBg
| GPIO_DATA1.bit1 (sfio = ?)
| TWL depop circuit (GPIO2_1)
|-
|-
| 0x68
| 0x68
| gpio, TwlBg
| gpio, TwlBg
| C-stick Interrupt
| C-stick interrupt (GPIO3_0)
|-
|-
| 0x69
| 0x69
| gpio, TwlBg
| gpio, TwlBg
| IrDA Interrupt
| IrDA interrupt (active-low) (GPIO3_1)
|-
|-
| 0x6A
| 0x6A
| gpio, TwlBg
| gpio, TwlBg
| Gyro Interrupt
| Gyro interrupt (GPIO3_2)
|-
|-
| 0x6B
| 0x6B
| gpio, TwlBg
| gpio, TwlBg
| GPIO_DATA3.bit3 (sfio = ?)
| C-stick "stop" (output) (GPIO3_3)
|-
|-
| 0x6C
| 0x6C
| gpio, TwlBg
| gpio, TwlBg
| GPIO_DATA3.bit4 (sfio = ?)
| IrDA TX-RC (output) (GPIO3_4)
|-
|-
| 0x6D
| 0x6D
| gpio, TwlBg
| gpio, TwlBg
| GPIO_DATA3.bit5 (sfio = ?)
| IrDA RXD (GPIO3_5)
|-
|-
| 0x6E
| 0x6E
| gpio, TwlBg
| gpio, TwlBg
| GPIO_DATA3.bit6 (sfio = ?)
| NFC output1 (?) (GPIO3_6)
|-
|-
| 0x6F
| 0x6F
| gpio, TwlBg
| gpio, TwlBg
| GPIO_DATA3.bit7 (sfio = ?)
| NFC output2 (?) (GPIO3_7)
|-
|-
| 0x70
| 0x70
| gpio, TwlBg
| gpio, TwlBg
| GPIO_DATA3.bit8 (sfio = ?)
| Headphones button/half-inserted (active-low) (GPIO3_8)
|-
|-
| 0x71
| 0x71
| gpio, TwlBg
| gpio, TwlBg
| MCU (HOME/POWER pressed/released or WiFi switch pressed, etc.)
| MCU interrupt (GPIO3_9)
|-
|-
| 0x72
| 0x72
| gpio, TwlBg
| gpio, TwlBg
| NFC
| NFC interrupt (?) (GPIO3_10)
|-
|-
| 0x73
| 0x73
| TwlBg
| TwlBg
| GPIO_DATA3.bit11 (sfio = ?)
| QTM output (?) (GPIO3_11)
|-
|-
| 0x74
| 0x74
Line 326: Line 326:




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).
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).
 
The Arm11 kernel configures interrupts the following way (it seems the GPIO IRQ layout doesn't match released 3DS models):
 
<nowiki>Interrupts 0x00 to 0x1F: edge-triggered, N-N
Interrupt 0x20: level-sensitive, 1-N
Interrupt 0x21: level-sensitive, 1-N
Interrupt 0x22: level-sensitive, 1-N
Interrupt 0x23: level-sensitive, 1-N
Interrupt 0x24: edge-triggered, 1-N
Interrupt 0x25: level-sensitive, 1-N
Interrupt 0x28: level-sensitive, 1-N
Interrupt 0x29: level-sensitive, 1-N
Interrupt 0x2a: level-sensitive, 1-N
Interrupt 0x2b: level-sensitive, 1-N
Interrupt 0x2c: level-sensitive, 1-N
Interrupt 0x2d: level-sensitive, 1-N
Interrupt 0x30: level-sensitive, 1-N
Interrupt 0x31: level-sensitive, 1-N
Interrupt 0x32: level-sensitive, 1-N
Interrupt 0x33: level-sensitive, 1-N
Interrupt 0x34: level-sensitive, 1-N
Interrupt 0x35: level-sensitive, 1-N
Interrupt 0x36: level-sensitive, 1-N
Interrupt 0x37: level-sensitive, 1-N
Interrupt 0x38: level-sensitive, 1-N
Interrupt 0x39: level-sensitive, 1-N
Interrupt 0x3a: level-sensitive, 1-N
Interrupt 0x3b: level-sensitive, 1-N
Interrupt 0x40: edge-triggered, 1-N
Interrupt 0x41: edge-triggered, 1-N
Interrupt 0x42: edge-triggered, 1-N
Interrupt 0x43: edge-triggered, 1-N
Interrupt 0x44: edge-triggered, 1-N
Interrupt 0x45: edge-triggered, 1-N
Interrupt 0x46: edge-triggered, 1-N
Interrupt 0x48: edge-triggered, 1-N
Interrupt 0x49: edge-triggered, 1-N
Interrupt 0x4a: edge-triggered, 1-N
Interrupt 0x4b: edge-triggered, 1-N
Interrupt 0x4c: edge-triggered, 1-N
Interrupt 0x4d: edge-triggered, 1-N
Interrupt 0x4e: edge-triggered, 1-N
Interrupt 0x4f: level-sensitive, 1-N
Interrupt 0x50: edge-triggered, 1-N
Interrupt 0x51: edge-triggered, 1-N
Interrupt 0x52: edge-triggered, 1-N
Interrupt 0x53: edge-triggered, 1-N
Interrupt 0x54: edge-triggered, 1-N
Interrupt 0x55: edge-triggered, 1-N
Interrupt 0x56: edge-triggered, 1-N
Interrupt 0x57: edge-triggered, 1-N
Interrupt 0x58: level-sensitive, 1-N
Interrupt 0x59: edge-triggered, 1-N
Interrupt 0x5a: edge-triggered, 1-N
Interrupt 0x5b: edge-triggered, 1-N
Interrupt 0x5f: edge-triggered, 1-N
Interrupt 0x60: edge-triggered, 1-N
Interrupt 0x61: edge-triggered, 1-N
Interrupt 0x64: edge-triggered, 1-N
Interrupt 0x65: edge-triggered, 1-N
Interrupt 0x66: edge-triggered, 1-N
Interrupt 0x68: edge-triggered, 1-N
Interrupt 0x69: edge-triggered, 1-N
Interrupt 0x6a: edge-triggered, 1-N
Interrupt 0x6b: edge-triggered, 1-N
Interrupt 0x6c: edge-triggered, 1-N
Interrupt 0x6d: edge-triggered, 1-N
Interrupt 0x6e: edge-triggered, 1-N
Interrupt 0x6f: edge-triggered, 1-N
Interrupt 0x70: edge-triggered, 1-N
Interrupt 0x71: edge-triggered, 1-N
Interrupt 0x72: edge-triggered, 1-N
Interrupt 0x73: edge-triggered, 1-N
Interrupt 0x74: edge-triggered, 1-N
Interrupt 0x75: edge-triggered, 1-N
Interrupt 0x76: level-sensitive, 1-N
Interrupt 0x77: level-sensitive, 1-N
Interrupt 0x78: edge-triggered, 1-N
Interrupt 0x79: level-sensitive, 1-N
Interrupt 0x7a: level-sensitive, 1-N
Interrupt 0x7b: level-sensitive, 1-N
Interrupt 0x7c: level-sensitive, 1-N
Interrupt 0x7d: level-sensitive, 1-N</nowiki>


= InterruptData =
= InterruptData =
Retrieved from "https://www.3dbrew.org/wiki/ARM11_Interrupts"