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Instead of calling hartid_to_scratch() callback every time when
we want sbi_scratch pointer from HART id, we create a table of
sbi_scratch pointers and use that to get sbi_scratch pointer.
As a result of HART id to scratch table, the conversion of
HART id to sbi_scratch pointer is just 2-3 instructions which
was 9 instructions previously.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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Currently pmp_get() returns the log2 length of the PMP memory
region size. The caller has to calculate the size based on that
and the same codes are duplicated.
Update this function to return decoded size directly.
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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As of today all platforms use 8KB of per-HART stack hence there is
no need for each platform to define its own macro or use the magic
number. Create one macro for all platforms. Platform still can use
its own version if needed.
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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The sbi_current_hartid() being a regular function is quite
expensive because for callers it is a function call instead
of a direct CSR read. This patch converts sbi_current_hartid()
into a macro in riscv_asm.h.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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The sbi_hart_id_to_scratch() just forwards call to firmware specific
hartid_to_scratch() callback so we make sbi_hart_id_to_scratch() as
macro in sbi_scratch.h instead of regular function in sbi_hart.c.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
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We currently have TRUE/FALSE, but it could be convenient to have
true/false as well.
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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The HART available mask and related APIs are now totally redundant
because of more extensive HART state machine implemented by sbi_hsm.
Due to above, we remove HART available mask and related APIs.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
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This patch introduce sbi_hsm_hart_started_mask() API as
a replacement of sbi_hart_available_mask() API.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
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The disabled_hard_mask in sbi_platform is only 64bits wide so we
cannot disable a HART with HARTID > 63. To tackle this, we remove
disabled_hart_mask and replace it with hart_disabled() platform
callback.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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The coldboot wait APIs are only used by sbi_init.c so no point in
having coldboot related code in sbi_hart.c.
As per-above rationale, we move all coldboot wait related APIs to
sbi_init.c as static/local functions.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
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Instead of using single ulong as source mask for sbi_tlb_info,
we use sbi_hartmask. This way sbi_tlb_info can easily scale
for large number of HARTs.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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We introduce SBI_TLB_INFO_INIT() helper macro to help easy
initialization of struct sbi_tlb_info which is passed to the
sbi_tlb_request() API.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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We add a simple hartmask library to create and maintain HART mask
in different parts of OpenSBI sources. This new library is build
as wrapper library on-top-of bitmap library.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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We add simple bitmap library which will help us create and maintain
bitmaps. It will also help us create a simple HART mask library.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This fixes various coding style issues found in the SBI codes.
No functional changes.
Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Currently, the per-HART scratch size is 256 bytes on RV32 and
512 bytes on RV64. This patch set per-HART scratch size to 4KB
(4096 bytes) for both RV32 and RV64 so that we don't run-out
of scratch space anytime soon.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch extends our bit operation library with mechanism to:
1. Iteratively traverse bits
2. Set bit
3. Clear bit
4. Change bit
5. ... other helpful functions ...
Most the above is adopted from Xvisor sources.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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The right location for all bits related defines and macros is
sbi_bitops.h hence this patch. With this patch, the sbi_bits.h
is redundant so we remove it.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch adds support HSM extension. The specification is available
at https://github.com/riscv/riscv-sbi-doc.
It allows to implement hart hotplug and fixed ordered hart booting in
supervisor.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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SBI HSM extension defines possible hart status values in the
specification.
Define all possible status values. Add a helper function to
convert hart state to status because hart states are internal
to OpenSBI only and may not match the status values defined in
the specification.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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This patch adds support for hart hotplug in OpenSBI using a generic WFI
based approach. Hart hotplug can be achieved via SBI HSM extension which
allows supervisor mode software to start or stop any harts anytime.
Any platform wishes to implement platform specific hart hotplug must
implement both hart_start and hart_stop in addition to enable platform
feature SBI_PLATFORM_HAS_HART_HOTPLUG.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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A platform may have a specific method to bring-up secondary harts for the
first time but may rely on generic WFI based approach for hart hotplug in
absence of a platform specific hart hotplug method.
Define a platform feature flag for such platforms. The platform needs to
implement platform specific bring-up method in hart_start and not define
hart_stop method in this case. They must only define
SBI_PLATFORM_HAS_HART_SECONDARY_BOOT.
SBI_PLATFORM_HAS_HART_HOTPLUG should only be defined when the platform
intend to support both hart_start and hart_stop and do not intend to rely
on generic WFI based approach.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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This patch updates OpenSBI version to 0.6 as part of
release preparation.
Signed-off-by: Anup Patel <[email protected]>
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We print MIDELEG and MEDELEG CSRs as part of boot prints so that
boot log shows the interrupts and exceptions delegated to S-mode.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Bin Meng <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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If a platform requires to perform a tlb full flush, they should set
the tlb_range_flush_limit value to zero. However, corresponding platform
API ignore the value and continue to return the default value.
Add a platform ops to retrieve platform specific tlb range flush limit.
The platform variable becomes redundant in presence of the platform ops.
Take this opportunity to remove the variable as well.
The default is still set to smallest page size in RISC-V (4KB), as there
is no way to figure out a best value for all platforms. Individual platform
should set it to the optimal value for their platform.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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This patch factor-out SBI base extension into its own source
for better modularity of SBI implementation.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch factor-out SBI vendor extension into its own source
for better modularity of SBI implementation.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch factor-out SBI replacement extensions (such as RFENCE,
IPI, and TIME) into its own source for better modularity of SBI
implementation.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch factor-out SBI legacy extension into its own source
for better modularity of SBI implementation.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch extends our SBI ecall implementation to allow
dynamic registration of various SBI extensions. Using this
dynamic registration we can break-up SBI ecall implementation
into multiple files and even register experimental/custom
SBI extensions from platform code.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch adds generic and simple list handling APIs adapted
from Xvisor sources.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch drops _fifo from the name of various sbi_tlb_fifo_xyz()
functions because all these functions deal with remote TLB managment
and FIFO is the per-HART data structure used internally by remote
TLB implementation.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch introduces sbi_ipi_event_create/destroy() APIs and
struct sbi_ipi_event_ops for creating/destroying IPI events
at runtime based of event operations.
This new APIs will help platform code and utils code to create
custom IPI events which are not part of generic OpenSBI library.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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Instead of directly calling sbi_ipi_send_many(), we introduce
sbi_tlb_fifo_request() for halting a set of HARTs.
This way in future we can assign any IPI event number for remote
FENCE within sbi_tlb.c only.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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Instead of directly calling sbi_ipi_send_many(), we introduce
sbi_ipi_send_halt() for halting a set of HARTs.
This way in future we can assign any IPI event number for HART
halting within sbi_ipi.c only.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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Instead of directly calling sbi_ipi_send_many(), we introduce
sbi_ipi_send_smode() for injecting S-mode software interrupts.
This way in future we can assign any IPI event number for S-mode
IPIs within sbi_ipi.c only.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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The struct sbi_ipi_data is only used in sbi_ipi.c so move it
to sbi_ipi.c from sbi_ipi.h.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch fixes a minor typo in comment for SBI_SCRATCH_SIZE define.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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Add OPENSBI_EXTERNAL_SBI_TYPES macro to allow external definitions of data
types and common macros. Also move some common definitions from sbi_bits.h to sbi_types.h.
Signed-off-by: Abner Chang <[email protected]>
Cc: Leif Lindholm <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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We add sbi_init_count() API which provides number of times a
given HART completed init sequence (warmboot/coldboot).
This will be very useful in debugging. With upcoming SBI HSM
extension, it will also help in implementing one-time init
code for each HART.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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We improve sbi_system_reboot() an sbi_system_shutdown() by:
1. Calling halt IPI to all harts (except current HART) before
calling platform reboot/shutdown hook.
2. Calling sbi_exit() instead of sbi_hang() in-case platform
reboot/shutdown hook failed.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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We add an optional platform irqchip exit hook for exit path handling
in sbi_exit() implementation.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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We add sbi_ipi_exit() API for exit path handling in sbi_exit()
implementation.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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We add sbi_timer_exit() API for OpenSBI exit path handling in
sbi_exit() implementation.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch adds system-level early_exit and final_exit APIs
with corresponding platform hooks. These new APIs will be
primarily used by sbi_exit() in OpenSBI exit path.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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This patch adds initial implementation of sbi_exit() API which
can be used to perform OpenSBI exit sequence for current HART.
The sbi_exit() implementation will be further extended by
subsequent patches.
Signed-off-by: Anup Patel <[email protected]>
Reviewed-by: Atish Patra <[email protected]>
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The hypervisor specification support hfence calls which can be used
issue tlb flush requests at both level of address translation. Currently,
these requests are issued only via SBI which are defined in v0.2.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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Currently, the toolchains do not have support for hfence instruction.
Hence, the instruction are hardcode until we have toolchain support.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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This patch adds new IPI extension which replaces ipi related
v0.1 extensions. This also adds a new API for ipi sending as trap
handling is not necessary in v0.2 SBI IPI related extensions.
It also modifies the IPI sending code which now accepts hart mask as a value
instead of S-mode virtual address. Thus, the caller should set it to exact hart
mask value everytime.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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We just need to distinguish only between FENCE and non FENCE related
IPIs as all of the fence related requests are handled via fifo now.
Remove the unnecessary IPI types related to individual fence types.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
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