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2022-06-13lib: utils/irqchip: Add wrapper for T-HEAD PLIC delegationSamuel Holland1-0/+2
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 <anup@brainfault.org> Signed-off-by: Samuel Holland <samuel@sholland.org>
2022-06-13lib: utils/irqchip: Add FDT wrappers for PLIC save/restore functionsSamuel Holland1-0/+20
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 <samuel@sholland.org> Reviewed-by: Anup Patel <anup@brainfault.org>
2022-06-13lib: irqchip/plic: Add priority save/restore helpersSamuel Holland1-0/+5
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 <anup@brainfault.org> Signed-off-by: Samuel Holland <samuel@sholland.org>
2022-06-13lib: irqchip/plic: Add context save/restore helpersSamuel Holland1-0/+6
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 <anup@brainfault.org> Signed-off-by: Samuel Holland <samuel@sholland.org>
2022-06-13lib: irqchip/plic: Factor out a context init functionSamuel Holland1-5/+3
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 <anup@brainfault.org> Signed-off-by: Samuel Holland <samuel@sholland.org>
2022-06-13lib: irqchip/plic: Constify plic_data pointersSamuel Holland1-4/+5
None of the functions modify the passed-in plic_data, so mark it const. Reviewed-by: Anup Patel <anup@brainfault.org> Signed-off-by: Samuel Holland <samuel@sholland.org>
2022-02-15lib: utils/irqchip: Add APLIC initialization libraryAnup Patel1-0/+47
We add simple APLIC initialization library which is independent of hardware description format (FDT or ACPI). This APLIC initialization library can be used by custom OpenSBI platform support to setup APLIC domains. Signed-off-by: Anup Patel <anup.patel@wdc.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Atish Patra <atishp@rivosinc.com>
2022-02-15lib: utils/irqchip: Add IMSIC libraryAnup Patel1-0/+50
We add simple IMSIC library which is independent of hardware description format (FDT or ACPI). This IMSIC library can be used by custom OpenSBI platform support to setup IMSIC for external interrupts. Signed-off-by: Anup Patel <anup.patel@wdc.com> Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Atish Patra <atishp@rivosinc.com>
2020-05-23lib: utils: Allow PLIC functions to be used for multiple PLICsAnup Patel1-4/+10
We extend all PLIC functions to have a "struct plic_data *" parameter pointing to PLIC details. This allows platforms to use these functions for multiple PLIC instances. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2020-05-23lib: utils: Remove redundant parameters from PLIC init functionsAnup Patel1-2/+2
The "target_hart" and "hart_count" parameters of PLIC cold and warm init functions are only used for sanity checks and not required in PLIC initialization. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2020-05-01lib: utils: Add simple FDT irqchip frameworkAnup Patel1-0/+26
We add simple irqchip framework which will select and use irqchip driver based on details in FDT passed by previous booting stage. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2020-03-18lib: utils: Move PLIC DT fix up codes to fdt_helper.cBin Meng1-2/+0
Now that we have a dedicated fdt_helper.c file for DT releated helper routines, move plic_fdt_fixup() codes from plic.c to fdt_helper.c and rename it to fdt_plic_fixup() at the same time, to keep name consistency in the same file. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>
2019-06-29Changed plic_set_thresh() and plic_set_ie() to publicPanagiotis Peristerakis1-0/+4
Signed-off-by: Panagiotis Peristerakis <perister@ics.forth.gr>
2019-06-19platform: Move platform common to lib/utils.Atish Patra1-0/+21
Currently, platform/common contains platform/non-platform specific common minimal drivers and libraries. This is helpful is all platforms are built within opensbi framework. Move them to lib/utils so that any external platform code also can reuse the minimalistic drivers or other common libraries. This patch doesn't introduce any functional changes. Signed-off-by: Atish Patra <atish.patra@wdc.com> Acked-by: Anup Patel <anup.patel@wdc.com>
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