linux/Documentation/arch/loongarch
Huacai Chen f339bd3b51 Docs/LoongArch: Add advanced extended IRQ model description
Introduce the advanced extended interrupt controllers (AVECINTC). This
feature will allow each core to have 256 independent interrupt vectors
and MSI interrupts can be independently routed to any vector on any CPU.

The whole topology of irqchips in LoongArch machines looks like this if
AVECINTC is supported:

  +-----+     +-----------------------+     +-------+
  | IPI | --> |        CPUINTC        | <-- | Timer |
  +-----+     +-----------------------+     +-------+
               ^          ^          ^
               |          |          |
        +---------+ +----------+ +---------+     +-------+
        | EIOINTC | | AVECINTC | | LIOINTC | <-- | UARTs |
        +---------+ +----------+ +---------+     +-------+
             ^            ^
             |            |
        +---------+  +---------+
        | PCH-PIC |  | PCH-MSI |
        +---------+  +---------+
          ^     ^           ^
          |     |           |
  +---------+ +---------+ +---------+
  | Devices | | PCH-LPC | | Devices |
  +---------+ +---------+ +---------+
                   ^
                   |
              +---------+
              | Devices |
              +---------+

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianyang Zhang <zhangtianyang@loongson.cn>
2024-09-24 15:32:20 +08:00
..
booting.rst
features.rst docs: kernel_feat.py: fix potential command injection 2024-01-11 09:21:01 -07:00
index.rst
introduction.rst Docs/LoongArch: Update links in LoongArch introduction.rst 2023-11-21 15:03:25 +08:00
irq-chip-model.rst Docs/LoongArch: Add advanced extended IRQ model description 2024-09-24 15:32:20 +08:00