platform/kernel/opensbi.git
23 months agolib: utils/serial: Use kconfig for enabling/disabling drivers
Anup Patel [Mon, 8 Aug 2022 04:03:21 +0000 (09:33 +0530)]
lib: utils/serial: Use kconfig for enabling/disabling drivers

We update serial drivers makefile to use kconfig for enabling/disabling
drivers. To avoid compile errors, we also enable appropriate serial
drivers for each platform.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
23 months agoMakefile: Compile lib/utils sources separately for each platform
Anup Patel [Mon, 8 Aug 2022 04:03:14 +0000 (09:33 +0530)]
Makefile: Compile lib/utils sources separately for each platform

Currently, if same build directory is used to compile two different
platforms then lib/utils objects are shared for these platforms.

We will be having platform specific configs to enable/disable drivers
in lib/utils and select compile time options for lib/utils sources.
This means lib/utils sources will now be compiled in a platform
specific way.

To tackle above, we update top-level Makefile as follows:
1) Don't create libsbiutils.a anymore because this can't be shared
   between platforms.
2) Compile lib/utils sources separately for each platform.
3) Add comments showing which make rules are for lib/sbi, lib/utils,
   firmware, and platform sources.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
23 months agoMakefile: Add initial kconfig support for each platform
Anup Patel [Mon, 8 Aug 2022 04:03:09 +0000 (09:33 +0530)]
Makefile: Add initial kconfig support for each platform

We extend the top-level makefile to allow kconfig based configuration
for each platform where each platform has it's own set of configs with
"defconfig" being the default config.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
23 months agoscripts: Add Kconfiglib v14.1.0 under scripts directory
Anup Patel [Mon, 8 Aug 2022 04:03:03 +0000 (09:33 +0530)]
scripts: Add Kconfiglib v14.1.0 under scripts directory

We adopt Kconfiglib v14.1.0 sources under scripts directory so that
top-level OpenSBI makefile can directly use Kconfiglib scripts without
expecting users to install a particular version of Kconfiglib on their
build system.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Tested-by: Andrew Jones <ajones@ventanamicro.com>
Acked-by: Atish Patra <atishp@rivosinc.com>
Tested-by: Atish Patra <atishp@rivosinc.com>
23 months agolib: sbi: Fix printf handling of long long
dramforever [Wed, 27 Jul 2022 16:30:05 +0000 (00:30 +0800)]
lib: sbi: Fix printf handling of long long

Read long long arguments directly using va_arg. Remove original hack for
RV32 that read a long long arg as two long args.

This un-breaks the case on RV64 where e.g. the long long is followed by
an odd number of ints:

    sbi_printf("%d %lld", (int) 1, (long long) 2LL);

Also remove the acnt variable, which is now unused.

Signed-off-by: dramforever <dramforever@live.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
23 months agolib: utils/serial: Ensure baudrate is non-zero before using
Andrew Jones [Mon, 18 Jul 2022 17:20:28 +0000 (19:20 +0200)]
lib: utils/serial: Ensure baudrate is non-zero before using

RISC-V doesn't generate exceptions on divide-by-zero, but the result,
all bits set, is not likely what people expect either. In all cases
where we divide by baudrate there's a chance it's zero (when the DT
it came from is "bad"). To avoid difficult to debug situations, leave
baudrate dependent registers alone when baudrate is zero, as, also in
all cases, it appears we can skip initialization of those registers
and still [hopefully] have a functioning UART.

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
23 months agolib: serial: Clean up coding style in sifive-uart.c
Andrew Jones [Mon, 18 Jul 2022 17:20:27 +0000 (19:20 +0200)]
lib: serial: Clean up coding style in sifive-uart.c

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
23 months agolib: utils/serial: Initialize platform_uart_data to zero
Andrew Jones [Mon, 18 Jul 2022 17:20:26 +0000 (19:20 +0200)]
lib: utils/serial: Initialize platform_uart_data to zero

While it doesn't look like there are any current cases of using
uninitialized data, let's zero all the UART data members to be
safe. Zero may not actually be better than a random number in
some cases, so all structure members should still be validated
before use, but at least zero is usually easier to debug than
some random stack garbage...

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
23 months agolib: utils/fdt: Factor out common uart node code
Andrew Jones [Mon, 18 Jul 2022 17:20:25 +0000 (19:20 +0200)]
lib: utils/fdt: Factor out common uart node code

Factor out the common code used by the fdt UART node parsers,
allowing us to drop duplicate code.

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
23 months agolib: sbi: Fix fw_event_map initialization
Atish Patra [Wed, 20 Jul 2022 21:50:35 +0000 (14:50 -0700)]
lib: sbi: Fix fw_event_map initialization

fw_event_map represents array of firmware events. It should initialized
for maximum number of firmware events not counters.

Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
23 months agolib: sbi: Fix possible buffer overrun in counter validation
Atish Patra [Wed, 20 Jul 2022 21:50:34 +0000 (14:50 -0700)]
lib: sbi: Fix possible buffer overrun in counter validation

The active_events array is accessed with counter ID passed from the supervisor
software before the counter ID bound check. This may cause a buffer overrun
if a supervisor passes an invalid counter ID.

Fix this by moving the access part after the bound check.

Reported-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
23 months agolib: sbi: Add the bound check for events during config match
Atish Patra [Wed, 20 Jul 2022 21:50:33 +0000 (14:50 -0700)]
lib: sbi: Add the bound check for events during config match

Currently, there is no sanity check for firmware event code. We don't see
any issue as Linux kernel driver does a bound check on firmware events
already. However, OpenSBI can't assume sane supervisor mode software
always. Thus, an invalid event idx can cause a buffer overflow error.
For hardware events, the match will fail for invalid event code anyways.
However, a search is unecessary if event code is invalid.

Add a event ID validation function to solve the issue.

Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
23 months agolib: sbi: Fix counter index sanity check
Atish Patra [Wed, 20 Jul 2022 21:50:32 +0000 (14:50 -0700)]
lib: sbi: Fix counter index sanity check

The current implementation computes the possible counter range
by doing a left shift of counter base. However, this may overflow depending
on the counter base value. In case of overflow, the highest counter id
may be computed incorrectly. As per the SBI specification, the respective
function should return an error if any of the counter is not valid.

Fix the counter index check by avoiding left shifting while doing the
sanity checks. Without the shift, the implementation just iterates
over the counter mask and computes the correct counter index by adding
the base to it.

Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
23 months agolib: sbi: Fix sbi_snprintf
Andrew Jones [Wed, 27 Jul 2022 14:17:47 +0000 (16:17 +0200)]
lib: sbi: Fix sbi_snprintf

printc would happily write to 'out' even when 'out_len' was zero,
potentially overflowing buffers. Rework printc to not do that and
also ensure the null byte is written at the last position when
necessary, as stated in the snprintf man page. Also, panic if
sprintf or snprintf are called with NULL output strings (except
the special case of snprintf having a NULL output string and
a zero output size, allowing it to be used to get the number of
characters that would have been written). Finally, rename a
goto label which clashed with 'out'.

Fixes: 9e8ff05cb61f ("Initial commit.")
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: utils/serial: Update Shakti UART based on latest implementation
Prasanna T [Fri, 8 Jul 2022 11:52:44 +0000 (17:22 +0530)]
lib: utils/serial: Update Shakti UART based on latest implementation

The age old version of Shakti UART was upgraded long back, but we missed
updating the driver in OpenSBI. The old version of UART is not supported
anymore, hence removed the inline comment which is also outdated now.

Signed-off-by: Prasanna T <ptprasanna@gmail.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
2 years agolib: sbi_hart: Shorten the code to set MPV bit
gagachang [Thu, 14 Jul 2022 17:29:41 +0000 (01:29 +0800)]
lib: sbi_hart: Shorten the code to set MPV bit

MPV bit is set when the value of next_virt boolean variable equals
true. Since the value of next_virt is either 0 or 1, we can set
MPV bit without if-else logic.

Signed-off-by: Che-Chia Chang <alvinga@andestech.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi: add check for ipi device for hsm start
Ben Dooks [Mon, 11 Jul 2022 07:18:03 +0000 (08:18 +0100)]
lib: sbi: add check for ipi device for hsm start

If the ecall SBI_EXT_HSM_HART_START is called it might try to wake the
secondary hart using sbi_ipi_raw_send() to send an IPI to the hart.
This can fail if there is no IPI device but no error is returned from
sbi_ipi_raw_send() so the ecall returns as if the action completed and
the caller continues without noticing (in the case of Linux it just hangs
waiting for the secondary hart to become active)

Fix this by changing sbi_ipi_raw_send() to return and error, and if an
error is returned, then return it via SBI_EXT_HSM_HART_START call.

Signed-off-by: Ben Dooks <ben.dooks@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi_timer: Added a conditional wait function which can timeout
Adnan Rahman Chowdhury [Thu, 30 Jun 2022 09:46:35 +0000 (10:46 +0100)]
lib: sbi_timer: Added a conditional wait function which can timeout

Motivation: Suppose a peripheral needs to be configured to transmit
data. There is an SFR bit which indicates that the peripheral is ready
to transmit. The firmware should check the bit and will only transmit
data when the peripheral is ready. When the firmware starts polling the
SFR, the peripheral could be busy transmitting/receiving other data so
the firmware must wait till that completes. Assuming that there is no
other way, the firmware shouldn't wait indefinitely.

The function sbi_timer_waitms_until() will constantly check whether a
certain condition is satisfied, or timeout occurs. It can be used for
the cases when a timeout is required.

Signed-off-by: Adnan Rahman Chowdhury <adnan.chowdhury@sifive.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agoinclude: Bump-up version to 1.1 v1.1
Anup Patel [Sat, 25 Jun 2022 03:42:10 +0000 (09:12 +0530)]
include: Bump-up version to 1.1

This patch updates OpenSBI version to 1.1 as part of
release preparation.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
2 years agolib: pmu: allow to use the highest available counter
Sergey Matyukevich [Fri, 24 Jun 2022 11:03:30 +0000 (14:03 +0300)]
lib: pmu: allow to use the highest available counter

OpenSBI explicitly assumes that there is no pmu hardware counter with
index 1: hardware uses that bit for TM control. So OpenSBI filters
out that index in sanity checks. However OpenSBI also excludes that
counter when reports total amount of hardware counters to Linux. As
a result, Linux uses incomplete counters mask excluding the highest
available counter.

Return accurate number of counters, update the firmware counter
starting index, fix range checks that include num_hw_ctrs.

The simple test is to make sure that there is no counter multiplexing
in the following command:

$ perf stat -e \
r8000000000000000,r8000000000000001,r8000000000000002,r8000000000000003, \
r8000000000000004,r8000000000000005,r8000000000000006,r8000000000000007, \
r8000000000000008,r8000000000000009,r800000000000000a,r800000000000000b, \
r800000000000000c,r800000000000000d,r800000000000000e,r800000000000000f  \
ls

Note that 16 firmware events with 16 counters won't require multiplexing.

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agoinclude: sbi: Change spec version to 1.0
Anup Patel [Thu, 23 Jun 2022 15:31:35 +0000 (21:01 +0530)]
include: sbi: Change spec version to 1.0

Now that SBI v1.0 specification is ratified, we change spec verion
implemented by OpenSBI to v1.0.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: utils/timer: Remove Allwinner D1 CLINT compatibles
Samuel Holland [Wed, 22 Jun 2022 04:57:42 +0000 (23:57 -0500)]
lib: utils/timer: Remove Allwinner D1 CLINT compatibles

The allwinner,sun20i-d1-clint compatible string is not documented in any
official binding, so it should not be used by drivers.

The MSWI in the D1 CLINT is compatible with the ACLINT specification, so
it can take advantage of generic driver support. However, that is only
possible if the MSWI and MTIMER are split into separate DT nodes. This
means the final binding for this device is likely to be incompatible
with what is implemented here.

Remove this compatible string from the driver to prevent it from
appearing in a stable version and causing future issues.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: irqchip/plic: fix typo in plic_warm_irqchip_init
Jan Remes [Tue, 21 Jun 2022 12:07:39 +0000 (14:07 +0200)]
lib: irqchip/plic: fix typo in plic_warm_irqchip_init

The second invocation of plic_context_init() incorrectly calls the
function with m_cntx_id instead of s_cntx_id. This breaks systems which
only have 1 external interrupt per hart.

Fixes: 8c362e7 ("lib: irqchip/plic: Factor out a context init function")
Signed-off-by: Jan Remes <jan.remes@codasip.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Samuel Holland <samuel@sholland.org>
2 years agolib: utils/timer: Add a separate compatible for the D1 CLINT
Samuel Holland [Wed, 20 Oct 2021 01:58:38 +0000 (20:58 -0500)]
lib: utils/timer: Add a separate compatible for the D1 CLINT

The CLINT in the Allwinner D1 SoC apparently does not support 64-bit
MMIO access. A property was added to support this quirk (and that
property was copied to the ACLINT MTIMER code). However, since this
difference in behavior makes the D1 CLINT incompatible with the SiFive
CLINT's programming interface, a better solution is to use a separate
compatible string.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: utils: Remove CSRs that set/clear an IMSIC interrupt file bits
Anup Patel [Thu, 16 Jun 2022 11:58:56 +0000 (17:28 +0530)]
lib: utils: Remove CSRs that set/clear an IMSIC interrupt file bits

Based on architecture review committee feedback, the [m|s|vs]seteienum,
[m|s|vs]clreienum, [m|s|vs]seteipnum, and [m|s|vs]clreipnum CSRs are
removed in the latest AIA draft v0.3.0 specification.
(Refer, https://github.com/riscv/riscv-aia/releases/tag/0.3.0-draft.31)

These CSRs were mostly for software convenience and software can always
use [m|s|vs]iselect and [m|s|vs]ireg CSRs to update the IMSIC interrupt
file bits.

We update the IMSIC programming as-per above to match the latest AIA
draft specification.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Fix tval and tinst for sbi_get_insn()
dramforever [Thu, 9 Jun 2022 07:07:31 +0000 (15:07 +0800)]
lib: sbi: Fix tval and tinst for sbi_get_insn()

We should not change trap->tval to mepc because mtval already points to
the faulting portion of the emulated instruction fetch, which is also
what stval is expected to be.

In addition, htinst is only allowed to be zero for instruction access
faults or page faults, and is only allowed to be zero or a
psuedoinstruction for instruction guest-page faults. Fix trap->tinst for
these cases.

Signed-off-by: dramforever <dramforever@live.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi: Fixup tinst for exceptions in sbi_misaligned_*()
dramforever [Thu, 9 Jun 2022 07:07:30 +0000 (15:07 +0800)]
lib: sbi: Fixup tinst for exceptions in sbi_misaligned_*()

If there is an exception while emulating a misaligned load/store, fixup
uptrap.tinst before redirecting. Otherwise, HS-mode software may receive
an htinst describing the lbu/sb instruction that faulted during
emulation[1].

[1]: https://github.com/riscv-software-src/opensbi/issues/258

Signed-off-by: dramforever <dramforever@live.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agoinclude: sbi: Add mtinst/htinst psuedoinstructions
dramforever [Thu, 9 Jun 2022 07:07:29 +0000 (15:07 +0800)]
include: sbi: Add mtinst/htinst psuedoinstructions

Add psuedoinstruction encodings written to mtinst/htinst for faults
caused by implicit memory access for VS-stage address translation

Signed-off-by: dramforever <dramforever@live.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agoplatform: Add HSM implementation for Allwinner D1
Samuel Holland [Mon, 13 Jun 2022 01:03:55 +0000 (20:03 -0500)]
platform: Add HSM implementation for Allwinner D1

Allwinner D1 contains a "PPU" power domain controller which can
automatically power down/up the CPU power domain. This power domain
includes the C906 core along with its CLINT and PLIC.

This HSM implementation supports non-retentive hart suspend by:
  1) Saving/restoring state that is lost during hart suspend,
  2) Performing cache maintenance before/after hart suspend,
  3) Configuring wakeup sources before hart suspend, and
  4) Asking the PPU to power down the hart when it enters WFI.

Since this HSM implementation is for a single-core SoC, it does not need
to worry about concurrency or saving multiple instances of state.

Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
2 years agolib: utils/irqchip: Add wrapper for T-HEAD PLIC delegation
Samuel Holland [Mon, 13 Jun 2022 01:03:54 +0000 (20:03 -0500)]
lib: utils/irqchip: Add wrapper for T-HEAD PLIC delegation

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>
2 years agolib: utils/irqchip: Add FDT wrappers for PLIC save/restore functions
Samuel Holland [Mon, 13 Jun 2022 01:03:53 +0000 (20:03 -0500)]
lib: utils/irqchip: Add FDT wrappers for PLIC save/restore functions

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>
2 years agolib: irqchip/plic: Add priority save/restore helpers
Samuel Holland [Mon, 13 Jun 2022 01:03:52 +0000 (20:03 -0500)]
lib: irqchip/plic: Add priority save/restore helpers

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>
2 years agolib: irqchip/plic: Add context save/restore helpers
Samuel Holland [Mon, 13 Jun 2022 01:03:51 +0000 (20:03 -0500)]
lib: irqchip/plic: Add context save/restore helpers

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>
2 years agolib: irqchip/plic: Factor out a context init function
Samuel Holland [Mon, 13 Jun 2022 01:03:50 +0000 (20:03 -0500)]
lib: irqchip/plic: Factor out a context init function

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>
2 years agolib: irqchip/plic: Constify plic_data pointers
Samuel Holland [Mon, 13 Jun 2022 01:03:49 +0000 (20:03 -0500)]
lib: irqchip/plic: Constify plic_data pointers

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>
2 years agolib: sbi_hsm: Assume a consistent resume address
Samuel Holland [Mon, 13 Jun 2022 01:03:48 +0000 (20:03 -0500)]
lib: sbi_hsm: Assume a consistent resume address

The suspend code needs to know the resume address for two reasons:
  1) Programming some hardware register or management firmware. Here we
     assume the hardware/firmware maintains its state between suspends,
     so it only needs to be programmed once at startup.
  2) When a non-retentive suspend request ends up being retentive, due
     to lack of hardware support, pending interrupt, or for some other
     reason. However, the behavior here is not platform-dependent, and
     this can be handled in the generic hart suspend function.

Since neither situation requires the platform-level suspend function to
know the resume address, stop passing it to that function. Instead,
handle the non-retentive to retentive situation generically.

Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
2 years agolib: sbi_hsm: Call a device hook during hart resume
Samuel Holland [Mon, 13 Jun 2022 01:03:47 +0000 (20:03 -0500)]
lib: sbi_hsm: Call a device hook during hart resume

Non-retentive suspend states may require platform-specific actions
during resume. For example, firmware may need to save and restore the
values of custom CSRs. Add a hook to support this.

Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
2 years agoplatform: generic: add overrides for vendor extensions
Mayuresh Chitale [Fri, 10 Jun 2022 04:49:20 +0000 (10:19 +0530)]
platform: generic: add overrides for vendor extensions

Allow the vendor_ext_check and vendor_ext_provider APIs of the
generic platform to be overridden by other platforms

Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi_trap: Redirect exception based on hedeleg
dramforever [Sun, 12 Jun 2022 05:57:37 +0000 (13:57 +0800)]
lib: sbi_trap: Redirect exception based on hedeleg

HS-mode software can choose what exceptions to delegate to VS-mode using
the hedeleg CSR. Synthetic VS/VU-mode exceptions should also honor
hedeleg. They should be redirected to VS-mode if and only if delegated
by HS-mode.

Signed-off-by: dramforever <dramforever@live.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi_illegal_insn: Add emulation for fence.tso
Samuel Holland [Sun, 29 May 2022 18:25:30 +0000 (13:25 -0500)]
lib: sbi_illegal_insn: Add emulation for fence.tso

While OpenC906 appears to properly decode `fence.tso` as a fence
instruction[1], the version of the C906 taped out in the Allwinner D1
does not, and raises illegal instruction.

Handle this errata by emulating `fence.tso` as `fence rw, rw`.

[1]: https://github.com/T-head-Semi/openc906/blob/30827e7f/C906_RTL_FACTORY/gen_rtl/idu/rtl/aq_idu_id_decd.v#L2097

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi_illegal_insn: Constify illegal_insn_table
Samuel Holland [Sun, 29 May 2022 18:25:29 +0000 (13:25 -0500)]
lib: sbi_illegal_insn: Constify illegal_insn_table

This table does not need to be modified at runtime.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi_timer: Drop unnecessary get_platform_ticks wrapper
Samuel Holland [Sun, 29 May 2022 17:00:48 +0000 (12:00 -0500)]
lib: sbi_timer: Drop unnecessary get_platform_ticks wrapper

The device's timer_value callback is already the right prototype to use
for the get_time_val function pointer.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: utils/fdt: Require match data to be const
Samuel Holland [Sun, 29 May 2022 18:32:11 +0000 (13:32 -0500)]
lib: utils/fdt: Require match data to be const

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 <guoren@kernel.org>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
2 years agolib: sbi: fix system_opcode_insn
Xiang W [Thu, 26 May 2022 14:14:44 +0000 (22:14 +0800)]
lib: sbi: fix system_opcode_insn

If the csr's operation comes from M mode, it should not be forwarded
to low-privilege processing, this patch fixes this problem.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: utils/fdt: rename fdt_parse_max_hart_id
Jan Remes [Fri, 13 May 2022 10:58:43 +0000 (12:58 +0200)]
lib: utils/fdt: rename fdt_parse_max_hart_id

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 <jan.remes@codasip.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agoplatform: generic: check if CPU node is enabled
Jan Remes [Fri, 13 May 2022 10:58:42 +0000 (12:58 +0200)]
platform: generic: check if CPU node is enabled

Ignore CPU nodes in FDT which are not enabled.

Signed-off-by: Jan Remes <jan.remes@codasip.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: utils: check if CPU node is enabled
Jan Remes [Fri, 13 May 2022 10:58:41 +0000 (12:58 +0200)]
lib: utils: check if CPU node is enabled

Ignore CPU nodes in FDT that are not enabled.

Signed-off-by: Jan Remes <jan.remes@codasip.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: utils/fdt: introduce fdt_node_is_enabled()
Jan Remes [Fri, 13 May 2022 10:58:40 +0000 (12:58 +0200)]
lib: utils/fdt: introduce fdt_node_is_enabled()

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 <jan.remes@codasip.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: utils/irqchip: fix typo when checking for CPU node
Jan Remes [Fri, 13 May 2022 04:28:54 +0000 (09:58 +0530)]
lib: utils/irqchip: fix typo when checking for CPU node

Fix typo in irqchip_imsic_update_hartid_table() when checking for CPU
node.

Signed-off-by: Jan Remes <jan.remes@codasip.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2 years agoplatform: generic: Move Sifive platform overrides into own directory
Anup Patel [Fri, 13 May 2022 03:57:23 +0000 (09:27 +0530)]
platform: generic: Move Sifive platform overrides into own directory

Let us move SiFive platform overrides for FU540 and FU740 into a separate
directory so better maintainability. Other SoC vendors can also create
their own directory under platform/generic.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agoplatform: generic: Generate platform override module list at compile-time
Anup Patel [Fri, 13 May 2022 03:57:18 +0000 (09:27 +0530)]
platform: generic: Generate platform override module list at compile-time

Instead of having platform override module list hard-coded in the C source,
we generate it using carray.sh at compile-time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: utils/gpio: Generate FDT gpio driver list at compile-time
Anup Patel [Fri, 13 May 2022 03:57:12 +0000 (09:27 +0530)]
lib: utils/gpio: Generate FDT gpio driver list at compile-time

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 <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: utils/i2c: Generate FDT i2c adapter driver list at compile-time
Anup Patel [Fri, 13 May 2022 03:56:45 +0000 (09:26 +0530)]
lib: utils/i2c: Generate FDT i2c adapter driver list at compile-time

Instead of having FDT i2c adapter driver list hard-coded in the C source,
we generate it using carray.sh at compile-time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: utils/ipi: Generate FDT ipi driver list at compile-time
Anup Patel [Fri, 13 May 2022 03:56:35 +0000 (09:26 +0530)]
lib: utils/ipi: Generate FDT ipi driver list at compile-time

Instead of having FDT ipi driver list hard-coded in the C source,
we generate it using carray.sh at compile-time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: utils/irqchip: Generate FDT irqchip driver list at compile-time
Anup Patel [Fri, 13 May 2022 03:56:27 +0000 (09:26 +0530)]
lib: utils/irqchip: Generate FDT irqchip driver list at compile-time

Instead of having FDT irqchip driver list hard-coded in the C source,
we generate it using carray.sh at compile-time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: utils/timer: Generate FDT timer driver list at compile-time
Anup Patel [Fri, 13 May 2022 03:56:20 +0000 (09:26 +0530)]
lib: utils/timer: Generate FDT timer driver list at compile-time

Instead of having FDT timer driver list hard-coded in the C source,
we generate it using carray.sh at compile-time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: utils/serial: Generate FDT serial driver list at compile-time
Anup Patel [Fri, 13 May 2022 03:56:13 +0000 (09:26 +0530)]
lib: utils/serial: Generate FDT serial driver list at compile-time

Instead of having FDT serial driver list hard-coded in the C source,
we generate it using carray.sh at compile-time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: utils/reset: Generate FDT reset driver list at compile-time
Anup Patel [Fri, 13 May 2022 03:56:06 +0000 (09:26 +0530)]
lib: utils/reset: Generate FDT reset driver list at compile-time

Instead of having FDT reset driver list hard-coded in the C source,
we generate it using carray.sh at compile-time.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agoMakefile: Add support for generating C array at compile time
Anup Patel [Fri, 13 May 2022 03:56:00 +0000 (09:26 +0530)]
Makefile: Add support for generating C array at compile time

Generating C array at compile time based on details provided by
objects.mk is a very useful feature which will help us compile
only a subset of drivers or modules.

We add a bash script (carray.sh) which takes array details and
object/variable list from command-line to generate a C source
containing array of object/variable pointers. We also extend
top-level makefile to use carray.sh whenever specified through
objects.mk.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agoMakefile: Allow generated C source to be anywhere in build directory
Anup Patel [Fri, 13 May 2022 03:55:50 +0000 (09:25 +0530)]
Makefile: Allow generated C source to be anywhere in build directory

The generated C source could be anywhere within build directory so
let us update the make rule to comple generated C source accordingly.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi_platform: Add callback to populate HART extensions
Anup Patel [Fri, 29 Apr 2022 15:32:24 +0000 (21:02 +0530)]
lib: sbi_platform: Add callback to populate HART extensions

We add platform specific extensions_init() callback which allows
platforms to populate HART extensions for each HART. For example,
the generic platform can populate HART extensions from HART ISA
string described in DeviceTree.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Add sbi_hart_update_extension() function
Anup Patel [Fri, 29 Apr 2022 15:17:04 +0000 (20:47 +0530)]
lib: sbi: Add sbi_hart_update_extension() function

We add sbi_hart_update_extension() function which allow platforms
to enable/disable hart extensions.

Signed-off-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Detect hart features only once for each hart
Anup Patel [Fri, 29 Apr 2022 13:08:05 +0000 (18:38 +0530)]
lib: sbi: Detect hart features only once for each hart

Currently, the hart_detect_features() is called everytime a hart
is stopped and started again which is unnecessary work.

We update hart_detect_features() to detect hart features only
once for each hart.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Convert hart features into hart extensions
Anup Patel [Thu, 28 Apr 2022 15:59:22 +0000 (21:29 +0530)]
lib: sbi: Convert hart features into hart extensions

Since past few years, we have been using "hart features" in OpenSBI
to represent all optionalities and multi-letter extensions defined
by the RISC-V specifications.

The RISC-V profiles specification has taken a different approach and
started assigning extension names for all optionalities which did not
have any extension name previously.
(Refer, https://github.com/riscv/riscv-profiles/blob/main/profiles.adoc)

Inspired from the RISC-V profiles specification, we convert OpenSBI
hart features into hart extensions. Going forward, we align the
extension naming with RISC-V profiles specification. Currently, only
"time CSR" and "AIA CSR" have not been assigned extension name but
for everything else we have a name.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Fix AIA feature detection
Anup Patel [Thu, 28 Apr 2022 14:05:39 +0000 (19:35 +0530)]
lib: sbi: Fix AIA feature detection

The AIA feature detection uses unnecessary goto which is not need
and AIA case in sbi_hart_feature_id2string() does not break. This
patch fixes both issues in AIA feature detection.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Remove MENVCFG hart feature
Anup Patel [Thu, 28 Apr 2022 13:48:17 +0000 (19:18 +0530)]
lib: sbi: Remove MENVCFG hart feature

If a hart implements privileged spec v1.12 (or higher) then we can
safely assume that menvcfg CSR is present and we don't need MENVCFG
as a hart feature.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Remove MCOUNTINHIBT hart feature
Anup Patel [Thu, 28 Apr 2022 13:29:14 +0000 (18:59 +0530)]
lib: sbi: Remove MCOUNTINHIBT hart feature

If a hart implements privileged spec v1.11 (or higher) then we can
safely assume that mcountinhibit CSR is present and we don't need
MCOUNTINHIBT as a hart feature.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Remove MCOUNTEREN and SCOUNTEREN hart features
Anup Patel [Thu, 28 Apr 2022 13:01:57 +0000 (18:31 +0530)]
lib: sbi: Remove MCOUNTEREN and SCOUNTEREN hart features

If a hart implements privileged spec v1.10 (or higher) then we can
safely assume that [m|s]counteren CSR are present and we don't need
MCOUNTEREN and SCOUNTEREN as hart features.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Update the name of ISA string printed at boot time
Anup Patel [Thu, 28 Apr 2022 12:41:02 +0000 (18:11 +0530)]
lib: sbi: Update the name of ISA string printed at boot time

The ISA string printed at boot time is not the complete ISA string
representing all single letter and multi-letter extensions rather
it is base ISA string derived from misa CSR so let us update the
boot print accordingly.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Remove 's' and 'u' from misa_string() output
Anup Patel [Thu, 28 Apr 2022 12:20:59 +0000 (17:50 +0530)]
lib: sbi: Remove 's' and 'u' from misa_string() output

Both 's' and 'u' are not treated as ISA extensions since these are
privilege modes so let's remove it from misa_string() output.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Detect and print privileged spec version
Anup Patel [Thu, 28 Apr 2022 12:00:02 +0000 (17:30 +0530)]
lib: sbi: Detect and print privileged spec version

It is possible to guess privileged spec versions based on the CSRs
that where introduced in different privileged spec versions. In
future, if we are not able guess privileged spec version then we
can have platform provide it.

We add privileged spec version as per-hart feature and try to guess
it based on presence of mcounteren, mcountinhibit, and menvcfg CSRs.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Fix mhpmeventh access for rv32 in absence of sscofpmf
Atish Patra [Thu, 28 Apr 2022 18:48:29 +0000 (11:48 -0700)]
lib: sbi: Fix mhpmeventh access for rv32 in absence of sscofpmf

MHPMEVENT3H-31H are defined in sscofpmf extension. Thus, they should be
accessed only if sscofpmf is present.

Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agoinclude: sbi: Define SBI_PMU_HW_EVENT_MAX to 256
Jun Liang Tan [Thu, 28 Apr 2022 09:45:02 +0000 (17:45 +0800)]
include: sbi: Define SBI_PMU_HW_EVENT_MAX to 256

Increase maximum number of PMU hardware events that can be mapped
by OpenSBI to 256

Signed-off-by: Jun Liang Tan <junliang.tan@linux.starfivetech.com>
Signed-off-by: Wei Liang Lim <weiliang.lim@linux.starfivetech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi: Fix mstatus_init() for RV32 when Sscofpmf is not available
Anup Patel [Thu, 28 Apr 2022 07:43:59 +0000 (13:13 +0530)]
lib: sbi: Fix mstatus_init() for RV32 when Sscofpmf is not available

The mhpmevent3h to mhpmevent31h CSRs are available on RV32 only when
Sscofpmf extension is available so mstatus_init() should set this
CSRs only when Sscofpmf extension is available.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: Implement Sstc extension
Atish Patra [Tue, 26 Apr 2022 06:29:22 +0000 (23:29 -0700)]
lib: sbi: Implement Sstc extension

Recently, Sstc extension was ratified. It defines stimecmp which allows
the supervisor mode to directly update the timecmp value without the
need of the SBI call. The hardware also can inject the S-mode timer
interrupt direclty to the supervisor without going through the M-mode.
To maintain backward compatibility with the older software, SBI call
now uses stimecmp directly if the hardware supports.

Implement the Sstc extension.

Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agodocs: pmu: Improve the PMU DT bindings
Atish Patra [Thu, 21 Apr 2022 02:48:56 +0000 (19:48 -0700)]
docs: pmu: Improve the PMU DT bindings

The current DT binding description is misleading and confusing. Clarify
the text and provide more examples.

Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi/hart: preserve csr validation value
Dmitry Dunaev [Sun, 17 Apr 2022 09:13:08 +0000 (14:43 +0530)]
lib: sbi/hart: preserve csr validation value

The OpenSBI hart init function hart_detect_features() try to read
important CSRs but reasign the last read value to the variable that
initially contains write probe value. So for series of CSRs (like
PMPADDRx) the second CSR probe value will became the initial value of
first probing CSR. To avoid of this issue the CSR read value should be
saved in different variable. In this configuration the count of PMP
will detect rightly if any PMPADDR is hardwired to zero.

Signed-off-by: Dmitry Dunaev <dunaich@mail.ru>
Signed-off-by: Anup Patel <anup@brainfault.org>
2 years agoinclude: correct the definition of MSTATUS_VS
Vincent Chen [Tue, 12 Apr 2022 01:16:53 +0000 (09:16 +0800)]
include: correct the definition of MSTATUS_VS

Accordind to the RISC-V privileged specification, the VS filed is
mstatus[10:9] instead of mstatus[24:23]. Modify the MSTATUS_VS
to the correct value.

Reported-by: I-Cheng Cheng <i-cheng.cheng@sifive.com>
Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: utils/serial: support 'reg-offset' property
Zong Li [Fri, 15 Apr 2022 02:24:20 +0000 (02:24 +0000)]
lib: utils/serial: support 'reg-offset' property

reg-offset property is used for offset to apply to the mapbase
from the start of the registers in 8250 UART. In Linux kernel,
it has been handled in 8250 UART driver.

dt-bindings:
<linux>/Documentation/devicetree/bindings/serial/8250.yaml

Signed-off-by: Zong Li <zong.li@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: irqchip/imsic: configure mstateen
Mayuresh Chitale [Mon, 11 Apr 2022 03:04:17 +0000 (08:34 +0530)]
lib: irqchip/imsic: configure mstateen

When mstateen registers are implemented, the AIA related
configurations need to be done in mstateen for the IMSIC
initialization to succeed.

Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi: Detect Smstateen CSRs at boot-time
Mayuresh Chitale [Mon, 11 Apr 2022 03:04:10 +0000 (08:34 +0530)]
lib: sbi: Detect Smstateen CSRs at boot-time

Extend HART feature detection to discover Smstateen CSRs at boot-time
and configure mstateen envcfg bit depending on availability of
menvcfg CSR.

Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi: Add Smstateen extension defines
Mayuresh Chitale [Mon, 11 Apr 2022 03:04:02 +0000 (08:34 +0530)]
lib: sbi: Add Smstateen extension defines

Smstateen extension provides a mechanism to plug potential
covert channels which are opened by extensions that add to
processor state that may not get context-switched.

Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi: Enable Svpbmt extension in the menvcfg CSR
Anup Patel [Tue, 29 Mar 2022 14:25:23 +0000 (19:55 +0530)]
lib: sbi: Enable Svpbmt extension in the menvcfg CSR

The menvcfg.PBMTE bit is read-only zero when Svpbmt extension is not
available so we try to enable menvcfg.PBMTE bit irrespective whether
Svpbmt is available or not.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Xiang W <wxjstz@126.com>
2 years agolib: sbi: Enable Zicbo[m|z] extensions in the menvcfg CSR
Anup Patel [Tue, 29 Mar 2022 14:12:22 +0000 (19:42 +0530)]
lib: sbi: Enable Zicbo[m|z] extensions in the menvcfg CSR

The bits to configure/enable Zicbo[m|z] extensions in the menvcfg
CSR are WARL. We try to enable these bits irrespective whether
these extensions are available or not because writes to these
bits will be ignored if these extensions are not available.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Xiang W <wxjstz@126.com>
2 years agolib: sbi: Detect menvcfg CSR at boot time
Atish Patra [Tue, 29 Mar 2022 13:55:36 +0000 (19:25 +0530)]
lib: sbi: Detect menvcfg CSR at boot time

We add the menvcfg CSR as a HART feature and detect it at boot time
using traping mechanism.

Signed-off-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
2 years agoinclude: Add defines for [m|h|s]envcfg CSRs
Anup Patel [Tue, 29 Mar 2022 13:30:37 +0000 (19:00 +0530)]
include: Add defines for [m|h|s]envcfg CSRs

The latest RISC-V privileged specification introduces xenvcfg CSRs
to enable/disable certain features/extensions for lower privilege
modes. This patch adds defines for these new [m|h|s]envcfg CSRs.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Xiang W <wxjstz@126.com>
2 years agoinclude: Use static asserts for FW_DYNAMIC_INFO_xxx_OFFSET defines
Xiang W [Wed, 16 Mar 2022 10:19:18 +0000 (18:19 +0800)]
include: Use static asserts for FW_DYNAMIC_INFO_xxx_OFFSET defines

Add static detection to prevent the modification of struct fw_dynamic_info
from forgetting the modification of FW_DYNAMIC_INFO_xxx_OFFSET

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agoinclude: Use static asserts for SBI_SCRATCH_xxx_OFFSET defines
Xiang W [Wed, 16 Mar 2022 10:16:48 +0000 (18:16 +0800)]
include: Use static asserts for SBI_SCRATCH_xxx_OFFSET defines

Add static detection to prevent the modification of struct sbi_scratch
from forgetting the modification of SBI_SCRATCH_xxx_OFFSET

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agoinclude: Use static asserts for SBI_PLATFORM_xxx_OFFSET defines
Xiang W [Wed, 16 Mar 2022 01:45:25 +0000 (09:45 +0800)]
include: Use static asserts for SBI_PLATFORM_xxx_OFFSET defines

Add static detection to prevent the modification of struct sbi_platform
from forgetting the modification of SBI_PLATFORM_xxx_OFFSET

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: Add error messages via conditional compilation for the future
Xiang W [Tue, 15 Mar 2022 16:22:40 +0000 (00:22 +0800)]
lib: Add error messages via conditional compilation for the future

On 128-bit machines, sbi_load_xx/sbi_store_xx needs to be improved.
Through this conditional compile, the corresponding implementation
can be prompted to be added.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agofirmware: Fix code for accessing hart_count and stack_size
Xiang W [Tue, 15 Mar 2022 16:22:39 +0000 (00:22 +0800)]
firmware: Fix code for accessing hart_count and stack_size

lwu exists under the current rv64 and should also exist under the rv128
in the future, so I modified the conditions of conditional compilation
so that it can adapt to the future situation

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: pmp_set/pmp_get moved errors from runtime to compile time
Xiang W [Tue, 15 Mar 2022 16:22:38 +0000 (00:22 +0800)]
lib: pmp_set/pmp_get moved errors from runtime to compile time

pmp_set/pmp_get calculates the location of the CSR register separately
through conditional compilation. In the case of non-32-bit and 64-bit,
we can report an error directly through #error without putting it at
runtime

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: utils: serial: Initial commit of xlnx-uartlite
Alistair Francis [Thu, 24 Feb 2022 05:01:46 +0000 (15:01 +1000)]
lib: utils: serial: Initial commit of xlnx-uartlite

Initial commit of the xlnx-uartlite device and FDT support. This was
tested by running OpenSBI on a modified QEMU virt machine using the
xlnx-uartlite for serial.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi: Add a simple external interrupt handling framework
Anup Patel [Fri, 18 Feb 2022 17:48:41 +0000 (23:18 +0530)]
lib: sbi: Add a simple external interrupt handling framework

Currently, the external interrupt handling is scattered between
sbi_init and sbi_trap. This patch moves all external interrupt
handling into a simple framework called sbi_irqchip.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: sbi: verbose sbi_domain_root_add_memregion
Nikita Shubin [Fri, 11 Feb 2022 11:11:54 +0000 (14:11 +0300)]
lib: sbi: verbose sbi_domain_root_add_memregion

Be more verbose on region confict, print addresses in conflict.

Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: sbi: fix typo in is_region_subset
Nikita Shubin [Fri, 11 Feb 2022 11:11:53 +0000 (14:11 +0300)]
lib: sbi: fix typo in is_region_subset

Fix typo in is_region_subset, regB_end should be calculated from regB.

Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
2 years agolib: utils: Disable appropriate APLIC DT nodes in fdt_fixups()
Anup Patel [Tue, 15 Jun 2021 06:07:59 +0000 (11:37 +0530)]
lib: utils: Disable appropriate APLIC DT nodes in fdt_fixups()

We should disable APLIC DT nodes in fdt_fixups() which are not
accessible to the next booting stage based on currently assigned
domain.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: utils/irqchip: Add FDT based driver for APLIC
Anup Patel [Thu, 8 Apr 2021 12:40:16 +0000 (18:10 +0530)]
lib: utils/irqchip: Add FDT based driver for APLIC

We add simple FDT irqchip driver for APLIC so that generic platform (and
other FDT based platforms) can utilize common APLIC initialization library.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
2 years agolib: utils/irqchip: Add APLIC initialization library
Anup Patel [Thu, 8 Apr 2021 05:58:02 +0000 (11:28 +0530)]
lib: utils/irqchip: Add APLIC initialization library

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>
2 years agolib: utils: Disable appropriate IMSIC DT nodes in fdt_fixups()
Anup Patel [Tue, 15 Jun 2021 05:49:40 +0000 (11:19 +0530)]
lib: utils: Disable appropriate IMSIC DT nodes in fdt_fixups()

We should disable IMSIC DT nodes in fdt_fixups() which are not
accessible to the next booting stage based on currently assigned
domain.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>