IRQ Block Registers (0x2) - 3.0 English

AXI Bridge for PCI Express Gen3 Subsystem Product Guide (PG194)
Document ID
PG194
Release Date
2023-11-24
Version
3.0 English

The IRQ Block registers are described in this section.

Table 1. IRQ Block Register Space
Address (hex) Register Name
0x00 IRQ Block Identifier (0x00)
0x04 IRQ Block User Interrupt Enable Mask (0x04)
0x08 IRQ Block User Interrupt Enable Mask (0x08)
0x0C IRQ Block User Interrupt Enable Mask (0x0C)
0x10 Reserved
0x14 Reserved
0x18 Reserved
0x40 IRQ Block User Interrupt Request (0x40)
0x44 Reserved
0x48 IRQ Block User Interrupt Pending (0x48)
0x4C Reserved
0x80 IRQ Block User Vector Number (0x80)
0x84 IRQ Block User Vector Number (0x84)
0x88 IRQ Block User Vector Number (0x88)
0x8C IRQ Block User Vector Number (0x8C)
0xA0 Reserved
0xA4 Reserved
Table 2. IRQ Block Identifier (0x00)
Bit Index Default Access Type Description
31:20 12’h1fc RO DMA Subsystem for PCIe identifier
19:16 4’h2 RO IRQ Identifier
15:8 8’h0 RO Reserved
7:0 8'h04 RO

Version

8'h01: 2015.3 and 2015.4

8'h02: 2016.1

8'h03: 2016.2

8'h04: 2016.3

8'h05: 2016.4

8'h06: 2017.1, 2017.2 and 2017.3
Table 3. IRQ Block User Interrupt Enable Mask (0x04)
Bit Index Default Access Type Description
[NUM_USR_INT-1:0]

AXI Bridge Functional Mode:

{NUM_USR_INT}'b1

DMA Functional Mode: 'h0

 RW

user_int_enmask

User Interrupt Enable Mask

0: Prevents an interrupt from being generated when the user interrupt source is asserted.

1: Generates an interrupt on the rising edge of the user interrupt source. If the Enable Mask is set and the source is already set, a user interrupt will be generated also.
Table 4. IRQ Block User Interrupt Enable Mask (0x08)
Bit Index Default Access Type Description
    W1S

user_int_enmask

Bit descriptions are the same as in the following table.
Table 5. IRQ Block User Interrupt Enable Mask (0x0C)
Bit Index Default Access Type Description
    W1C user_int_enmask

Bit descriptions are the same as in table: IRQ Block User Interrupt Enable Mask (0x04).
Table 6. IRQ Block User Interrupt Request (0x40)
Bit Index Default Access Type Description
[NUM_USR_INT-1:0] ‘h0 RO

user_int_req

User Interrupt Request

This register reflects the interrupt source AND’d with the enable mask register.
Table 7. IRQ Block User Interrupt Pending (0x48)
Bit Index Default Access Type Description
[NUM_USR_INT-1:0] ‘h0 RO

user_int_pend

User Interrupt Pending.

This register indicates pending events. The pending events are cleared by removing the event cause condition at the source component.

If MSI is enabled, this register specifies the MSI or MSI-X vector number of the MSI. In Legacy interrupts only the two LSBs of each field should be used to map to INTA, B, C, or D.

Table 8. IRQ Block User Vector Number (0x80)
Bit Index Default Access Type Description
28:24 5’h3 RW

vector 3

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[3].
20:16 5’h2 RW

vector 2

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[2].
12:8 5’h1 RW

vector 1

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[1].
4:0 5’h0 RW

vector 0

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[0].

If MSI is enabled, this register specifies the MSI or MSI-X vector number of the MSI. In Legacy interrupts only the 2 LSB of each field should be used to map to INTA, B, C, or D.

Table 9. IRQ Block User Vector Number (0x84)
Bit Index Default Access Type Description
28:24 5’h7 RW vector 7

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[7].
20:16 5’h6 RW vector 6

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[6].
12:8 5’h5 RW vector 5

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[5].
4:0 5’h4 RW vector 4

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[4].

If MSI is enabled, this register specifies the MSI or MSI-X vector number of the MSI. In Legacy interrupts only the 2 LSB of each field should be used to map to INTA, B, C, or D.

Table 10. IRQ Block User Vector Number (0x88)
Bit Index Default Access Type Description
28:24 5’hB RW

vector 11

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[11].
20:16 5’hA RW

vector 10

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[10].
12:8 5’h9 RW

vector 9

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[9].
4:0 5’h8 RW

vector 8

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[8].

If MSI is enabled, this register specifies the MSI or MSI-X vector number of the MSI. In Legacy interrupts only the 2 LSB of each field should be used to map to INTA, B, C, or D.

Table 11. IRQ Block User Vector Number (0x8C)
Bit Index Default Access Type Description
28:24 5’hF RW

vector 15

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[15].
20:16 5’hE RW

vector 14

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[14].
12:8 5’hD RW

vector 13

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[13].
4:0 5’hC RW

vector 12

The vector number that is used when an interrupt is generated by the user IRQ usr_irq_req[12].