Let us have common FDT based reset driver for syscon reboot and
poweroff. The device tree bindings for syscon reboot and poweroff
are already available in the Linux kernel sources.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

Let us add a simple FDT based system regmap driver which follows the
device tree bindings already defined in the Linux kernel.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

We add a simple FDT based regmap framework which is built on top of
generic regmap library. The phandle of FDT regmap DT node is treated
as unique regmap ID. The FDT based regmap drivers will be probed
on-demand from fdt_regmap_get_by_phandle() and fdt_regmap_get()
called by the regmap client drivers.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

We add generic regmap access library which is independent of
hardware description format (FDT or ACPI). The OpenSBI platform
support or regmap drivers can register regmap instances which
can be discovered by different regmap clients based on the
unique ID of regmap instances.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

The "driver" pointer in struct i2c_adapter is not used anywhere
so let us remove it.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

Because the CSR names in the spec are mseccfg and mseccfgh. Remove
CSR_MSECCFG_LOWER and CSR_MSECCFG_UPPER and directly define
CSR_MSECCFG and CSR_MSECCFGH.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

commit 68e66106120f ("SUSP: Add SBI_ERR_DENIED") of the SBI spec adds
a new error code, SBI_ERR_DENIED, which is returned when entry criteria
has not be meant. Update the system suspend implementation to return
this error when it has detected that not all harts are in the STOPPED
state.

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

License identifiers should be machine readable.

According to the SPDX v2.3.0 specification annex E parentheses are not
used in the SPDX identifier field when specifying multiple licenses [1].

[1] https://spdx.github.io/spdx-spec/v2.3/using-SPDX-short-identifiers-in-source-files/



Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

With Smepmp enabled, it is necessary for shared memory from
S/U mode to be mapped/unmapped before and after read/write
of the memory region. This patch maps the debug console
shared memory before accessing it.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

When Smepmp is enabled, M-mode will need to map/unmap the
shared memory before it can read/write to it. This patch
adds functions to create dynamic short-lived mappings.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

- If Smepmp is enabled, the access flags of an entry are determined based on
  truth table defined in Smepmp.
- First PMP entry (index 0) is reserved.
- Existing boot PMP entries start from index 1.
- Since enabling Smepmp revokes the access privileges of the M-mode software
  on S/U-mode region, first PMP entry is used to map/unmap the shared memory
  between M and S/U-mode. This allows a temporary access window for the M-mode
  software to read/write to S/U-mode memory region.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Configure PMP at last when all other initializations have been done.
Because if SMEPMP is detected, M-mode access to the S/U space will be
rescinded.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Since pmp entries have implicit priority on index, previous entries will
deny access to SU on M-mode region. Also, M-mode will not have access to
SU region while previous entries will allow access to M-mode regions.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

- Add function to parse ISA string in FDT.
- Set Smepmp feature bit in extensions if "smepmp" string is found in ISA string.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

- Add Smepmp as extension in sbi_hart_extensions enum
- Return "smepmp" string for Smepmp extension from sbi_hart_extension_id2string

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Smepmp specification defines a truth table based on which the access is allowed to
different modes. This patch adds different flags based on this truth table.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

- Add a function to disable a given PMP entry.
- Add a function to check if a given entry is disabled.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

- Add macros for Machine Security Configuration (mseccfg) CSR
- Add macros to access/manipulate bits in msecfg CSR

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Currently, we see following compile error in the designeware GPIO driver
for RV32 systems:

lib/utils/gpio/fdt_gpio_designware.c:115:20: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
  115 |         chip->dr = (void *)addr + (bank * 0xc);
      |                    ^
lib/utils/gpio/fdt_gpio_designware.c:116:21: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
  116 |         chip->ext = (void *)addr + (bank * 4) + 0x50;

We fix the above error using an explicit type-cast to 'unsigned long'.

Fixes: 7828eeba

 ("gpio/desginware: add Synopsys DesignWare APB GPIO support")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

Fix special case: sbi_snprintf(out, out_len, ...) when out_len equal
1, The previous code will not fill the buffer with any char.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

A single scan of the format char may add multiple characters to the
tbuf, causing a buffer overflow. You should check if tbuf is full in
printc so that it does not cause a buffer overflow.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Because *out needs to reserve a byte to hold '\0', no more characters
should be added to the buffer when *out has one byte left, and the
buffer size *out_len should not be modified. this patch prevents
the correction of *out_len when *out_len is 1.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

When doing width = width - strlen(string) in prints there is no need
to consider the case that witdh may be less than 0. This is because
the code to do filling needs to be executed under the condition that
width > 0.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Fix two bug:
> printf("%#08x", 0x123); /* print 0000x123 */
> printf("%#x", 0); /* print 0x0 */

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Add o type for print to print octal numbers

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

The information of sg/b/letbase can be obtained by the type character,
simplifying the parameter by passing the type directly.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

The space flag is used to add a space before positive numbers, and
apostrophe is used to print the thousand separator. Add code to
ignore these two flags

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Adds + flags for print, prefixing positive numbers with + when this
flags is present

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Left alignment and padding '0' should not exist at the same time,
this patch skips padding.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

The flags for print should be able to appear in any order. The
previous code required the order to be fixed.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Fix Priv spec version typo in commit d4b563c8 ("lib: sbi: Remove MCOUNTEREN
and SCOUNTEREN hart features").

At least Priv spec v1.11 is required for [m|s]counteren and mcountinhibit CSRs.

Fixes: d4b563c8

 ("lib: sbi: Remove MCOUNTEREN and SCOUNTEREN hart features")
Signed-off-by: Ley Foon Tan <leyfoon.tan@starfivetech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

The hart_pmu_get_allowed_bits() function detects implemented bits
of mhpm counters so let us rename this function accordingly.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

Let us follow alphabetical order for HART ISA extension so that
it is simpler to maintain.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

Recently ratified Zihpm ISA extension covers all [m]hpm* CSRs
so we add Zihpm as a HART ISA extension in OpenSBI.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

Recently ratified Zicntr ISA extension covers cycle, time and
instret CSRs so we replace the "time" ISA extension with "zicntr"
ISA extension in OpenSBI.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

The cold_init() functions of ACLINT drivers should skip the HART
if sbi_hartid_to_scratch() returns NULL because we might be dealing
with a HART that is disabled in the device tree.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>

Add a driver for the Synopsys DesignWare APB GPIO IP block found in many
SoCs.

Signed-off-by: Ben Dooks <ben.dooks@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

On a misconfigured system we could access phs->active_events[] out of
bounds. Check that num_hw_ctrs is less or equal SBI_PMU_HW_CTR_MAX.

Addresses-Coverity-ID: 1566113 ("Out-of-bounds read")
Addresses-Coverity-ID: 1566114 ("Out-of-bounds write")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

Use tabs rather than spaces.

Signed-off-by: Gianluca Guida <gianluca@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>

This patch updates OpenSBI version to 1.3 as part of
release preparation.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>