opensbi.git/lib/utils/ipi/fdt_ipi_plicsw.c, branch master

lib: utils/ipi: Convert IPI drivers as early drivers

2025-09-16T04:26:31Z

The fdt_ipi_init() is already called from generic_early_init() so let's convert IPI drivers as early drivers. Signed-off-by: Anup Patel Reviewed-by: Samuel Holland Tested-by: Nick Hu Link: https://lore.kernel.org/r/20250904052410.546818-4-apatel@ventanamicro.com Signed-off-by: Anup Patel

lib: utils/ipi: Use fdt_driver for initialization

2024-11-28T12:12:05Z

The ipi driver subsystem does not need any extra data, so it can use `struct fdt_driver` directly. The generic fdt_ipi_init() performs a best-effort initialization of all matching DT nodes. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

platform: Drop IPI warm init and exit hooks

2024-11-11T12:51:04Z

Now that the SBI IPI core clears IPIs at warm boot in a generic way, none of the drivers or platforms use these hooks, and we can remove them. Platforms need only to initialize the driver once during cold init. If other hooks are needed in the future, they can be added to struct sbi_ipi_device. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: sbi_ipi: Move initial IPI clear to sbi_ipi_init()

2024-11-11T12:48:35Z

sbi_ipi_init() expects the platform warm init function to clear IPIs on the local hart, but there is already a generic function to do this. After this change, none of the existing drivers need a warm init callback. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: utils/ipi: Constify FDT pointers in parsing functions

2024-08-24T07:32:33Z

Indicate that none of these functions modify the devicetree by constifying the parameter type. Signed-off-by: Samuel Holland Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

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

2022-10-23T05:01:01Z

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 Reviewed-by: Anup Patel