Firmware/opensbi
8
0
Fork 0
forked from Mirrors/opensbi
Code Pull Requests Activity

lib: utils/ipi: Add Andes fdt ipi driver support

Browse Source 
Move Andes PLICSW ipi device to fdt ipi framework, this patch is based
on Leo's modified IPI scheme on PLICSW.

Current IPI scheme uses bit 0 of pending reigster on PLICSW to send IPI
from hart 0 to hart 7, but bit 0 needs to be hardwired to 0 according
to spec. After some investigation, self-IPI seems to be seldom or never
used, so we re-order the IPI scheme to support 8 core platforms.

dts example (Quad-core AX45MP):

  plicsw: interrupt-controller@e6400000 {
          compatible = "andestech,plicsw";
          reg = <0x00000000 0xe6400000 0x00000000 0x00400000>;
          interrupts-extended = <&CPU0_intc 3
                                 &CPU1_intc 3
                                 &CPU2_intc 3
                                 &CPU3_intc 3>;
          interrupt-controller;
          #address-cells = <2>;
          #interrupt-cells = <2>;
  };

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Yu Chien Peter Lin
2022-10-14 08:32:50 +08:00
committed by Anup Patel
parent 6f3258e671
commit ce7c490719
13 changed files with 305 additions and 211 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
platform/andes/ae350/Kconfig
View File

@@ -11,6 +11,8 @@ config PLATFORM_ANDES_AE350
select FDT_RESET_ATCWDT200
select FDT_IRQCHIP
select FDT_IRQCHIP_PLIC
select FDT_IPI
select FDT_IPI_PLICSW
default y
if PLATFORM_ANDES_AE350