starfive-tech/opensbi.git/lib/utils, branch SDK_v2.1.0

lib: utils/serial: Round UART8250 baud rate divisor to nearest integer

2022-02-04T05:46:29+00:00

Previously, it was rounded down and that gives suboptimal results when non-standard clock sources or baud rates are used. Signed-off-by: Jakub Luzny Reviewed-by: Anup Patel

lib: fix compilation when strings.h is included

2022-02-04T05:34:19+00:00

In a systems that provide strings.h and it is included together with sbi_bitops.h the compilation error appears. The ffs() and fls() are provided by strings.h Signed-off-by: Petro Karashchenko Reviewed-by: Anup Patel

lib: fix pointer of type 'void *' used in arithmetic

2022-01-21T16:28:12+00:00

Using "void *" in arithmetic causes errors with strict compiler settings: "error: pointer of type 'void *' used in arithmetic [-Werror=pointer-arith]" Avoid these by calculating on "char *" where 1-byte data size is assumed. Signed-off-by: Jukka Laitinen Reviewed-by: Dong Du Reviewed-by: Xiang W Reviewed-by: Anup Patel

lib: utils/sys: Extend HTIF library to allow custom base address

2022-01-11T12:47:49+00:00

Some of RISC-V emulators provide HTIF at fixed base address so for such emulators users have to hard-code HTIF base address in the linker script. To address this problem, we let users optionally provide fixed HTIF base address via platform support (or device tree). Signed-off-by: Anup Patel Reviewed-by: Dong Du Reviewed-by: Atish Patra

lib: utils/ipi: Fix size check in aclint_mswi_cold_init()

2022-01-11T12:47:07+00:00

Currently, the ACLINT MSWI size check is forcing size to be at least 0x4000. This is inappropriate check because most systems will never utilize full 16KB for a single ACLINT MSWI device so instead we should check that ACLINT MSWI size is enough for on the associated HARTs. Signed-off-by: Anup Patel Reviewed-by: Dong Du Reviewed-by: Alistair Francis

lib: pmu: support the event ID encoded by a bitmap.

2021-12-03T04:07:03+00:00

RISC-V privilege specification does not specify how to encode the event ID. Therefore, each platform is allowed to customize its own encoding rule. The common encoding methods are as follow, directly assigning a number to an event, or every bit in the mphmevent CSR controls one specified event or mixes the above two methods. To enable OpenSBI to support the above three encoding methods simultaneously, this patch repurpose the dt property "riscv,raw-event-to-mhpmcounters". The "riscv,raw-event-to-mhpmcounters" will describes the one or multiple raw events that could be counted by a set of counters. But, the column number of "riscv,raw-event-to-mhpmcounters" is extended from 2 to 3. The 1st column (64bit) is the ID of the raw events. The 2nd column (64bit) represents a select_mask now to represent the bits used for event ID encoding. If a platform directly encodes each raw PMU event as a unique ID, the value of select_mask will be 0xffffffff_ffffffff. Signed-off-by: Vincent Chen Signed-off-by: Atish Patra Reviewed-by: Anup Patel

lib: utils: Add LiteX UART support

2021-11-18T07:52:02+00:00

Add support for the UART provided by the LiteX SoC framework (https://github.com/enjoy-digital/litex), based on its FDT info (described in the Linux tree at Documentation/devicetree/bindings/serial/litex,liteuart.yaml). Signed-off-by: Gabriel Somlo Reviewed-by: Xiang W Reviewed-by: Anup Patel

lib: utils/i2c: Add minimal SiFive I2C driver

2021-11-12T04:59:08+00:00

Minimum SiFive I2C driver to read/send bytes over I2C bus. This allows querying information and perform operation of onboard PMIC, as well as power-off and reset. Tested-by: Heinrich Schuchardt Reviewed-by: Alexandre Ghiti Tested-by: Alexandre Ghiti Signed-off-by: Nikita Shubin

lib: utils/i2c: Add simple FDT based I2C framework

2021-11-12T04:49:45+00:00

FDT based I2C framework on the top of I2C library. The drivers are probed on demand by fdt_i2c_adapter_get function. Tested-by: Heinrich Schuchardt Reviewed-by: Alexandre Ghiti Tested-by: Alexandre Ghiti Signed-off-by: Nikita Shubin

lib: utils/i2c: Add generic I2C configuration library

2021-11-12T04:47:50+00:00

Helper library to keep track of registered I2C adapters, identified by dts offset, basic send/read functions and adapter configuration (enable, set dividers, etc...). Tested-by: Heinrich Schuchardt Reviewed-by: Alexandre Ghiti Tested-by: Alexandre Ghiti Signed-off-by: Nikita Shubin