opensbi.git/include/sbi_utils, branch v1.1

lib: utils/irqchip: Add wrapper for T-HEAD PLIC delegation

2022-06-13T06:24:06Z

The delegation bit is lost along with the rest of the PLIC state when the CPU power domain in the Allwinner D1 is powered down, so the PLIC needs to be re-delegated to S-mode during the hart resume path. Reviewed-by: Anup Patel Signed-off-by: Samuel Holland

lib: utils/irqchip: Add FDT wrappers for PLIC save/restore functions

2022-06-13T06:24:06Z

These functions save/restore the state of the PLIC associated with the current hart. The context save/restore functions only manipulate a single context, since most likely the M-mode context is unused and does not need to be saved. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: irqchip/plic: Add priority save/restore helpers

2022-06-13T06:24:06Z

These can be used by platform code to save the PLIC priority state, if it would otherwise be lost during non-retentive suspend. The platform is responsible for allocating all necessary storage. As a space optimization, store the saved priority values as 8-bit integers, since that is large enough to hold any priority value on the relevant platforms. Reviewed-by: Anup Patel Signed-off-by: Samuel Holland

lib: irqchip/plic: Add context save/restore helpers

2022-06-13T06:24:06Z

These can be used by platform code to save the PLIC context state, if it would otherwise be lost during non-retentive suspend. The platform is responsible for allocating all necessary storage. Reviewed-by: Anup Patel Signed-off-by: Samuel Holland

lib: irqchip/plic: Factor out a context init function

2022-06-13T06:24:06Z

This simplifies both the callers and the callees by removing duplicated code and consolidating the error handling. It also fixes two bugs in the process: 1) ie_words was one too large when plic->num_src was a multiple of 32. 2) plic_set_ie takes a 32-bit mask, not a Boolean value, so the FPGA platforms previously only enabled one out of every 32 interrupts. Reviewed-by: Anup Patel Signed-off-by: Samuel Holland

lib: irqchip/plic: Constify plic_data pointers

2022-06-13T06:24:06Z

None of the functions modify the passed-in plic_data, so mark it const. Reviewed-by: Anup Patel Signed-off-by: Samuel Holland

lib: utils/fdt: Require match data to be const

2022-05-30T05:02:35Z

Match data stores hardware attributes which do not change at runtime, so it does not need to be mutable. Make it const. Reviewed-by: Guo Ren Reviewed-by: Xiang W Reviewed-by: Anup Patel Signed-off-by: Samuel Holland

lib: utils/fdt: rename fdt_parse_max_hart_id

2022-05-14T04:48:12Z

The function returns the highest hart-id of the harts actually used in the system (enabled). Change the name to reflect this fact. Signed-off-by: Jan Remes Reviewed-by: Anup Patel

lib: utils/fdt: introduce fdt_node_is_enabled()

2022-05-14T04:46:24Z

If an FDT node contains a "status" property and this property is not "ok" or "okay", this node should be ignored. Introduce a function that checks this. Signed-off-by: Jan Remes Reviewed-by: Xiang W Reviewed-by: Anup Patel

lib: utils/gpio: Generate FDT gpio driver list at compile-time

2022-05-13T03:57:12Z

Instead of having FDT gpio driver list hard-coded in the C source, we generate it using carray.sh at compile-time. Signed-off-by: Anup Patel Reviewed-by: Atish Patra