opensbi.git/include/sbi/riscv_barrier.h, branch master

lib: sbi: Simplify wait_for_coldboot() implementation

2024-04-05T12:18:23Z

On QEMU virt machine with large number of HARTs, some of the HARTs randomly fail to come out of wait_for_coldboot() due to one of the following race-conditions: 1) Failing HARTs are not able to acquire the coldboot_lock and update the coldboot_hartmask in wait_for_coldboot() before the coldboot HART acquires the coldboot_lock and sends IPI in wake_coldboot_harts() hence the failing HARTs never receive IPI from the coldboot HART. 2) Failing HARTs acquire the coldbood_lock and update the coldboot_hartmask before coldboot HART does sbi_scratch_init() so the sbi_hartmask_set_hartid() does not update the coldboot_hartmask on the failing HARTs hence they never receive IPI from the coldboot HART. To address this, use a simple busy-loop in wait_for_coldboot() for polling on coldboot_done flag. Signed-off-by: Anup Patel

lib: utils: reset: Add T-HEAD sample platform reset driver

2021-04-22T09:43:53Z

This driver is for T-HEAD test chip, fpga. It could work with all T-HEAD riscv processors: C9xx series. example1: (Using io-regs for reset) reset: reset-sample { compatible = "thead,reset-sample"; plic-delegate = <0xff 0xd81ffffc>; entry-reg = <0xff 0xff019050>; entry-cnt = <4>; control-reg = <0xff 0xff015004>; control-val = <0x1c>; csr-copy = <0x7f3 0x7c0 0x7c1 0x7c2 0x7c3 0x7c5 0x7cc>; }; example2: (Using csr-regs for reset) reset: reset-sample { compatible = "thead,reset-sample"; plic-delegate = <0xff 0xd81ffffc>; using-csr-reset; csr-copy = <0x7c0 0x7c1 0x7c2 0x7c3 0x7c5 0x7cc 0x3b0 0x3b1 0x3b2 0x3b3 0x3b4 0x3b5 0x3b6 0x3b7 0x3a0>; }; example3: (Only delegate plic enable to S-mode) reset: reset-sample { compatible = "thead,reset-sample"; plic-delegate = <0xff 0xd81ffffc>; }; After this patch, all T-HEAD c9xx would use platform/generic with fw_dynamic as default: CROSS_COMPILE=riscv64-linux-gnu- PLATFORM=generic FW_PIC=y /usr/bin/make The platform/thead will be deprecated. Signed-off-by: Guo Ren Reviewed-by: Anup Patel

all: run clang-format and update checked-in files

2019-04-24T04:19:46Z

Noisy commit, no functional changes. Generated with an current upstream clang-format and: clang-format -i $(find . -name \*.[ch]) Signed-off-by: Olof Johansson

all: Annotate some tables to have clang-format leave them alone

2019-04-24T04:19:46Z

One of the shortcomings of clang-format is that it doesn't allow for aligned define tables, which is used for a number of constants. Add annotation to disable the automatic formatting where needed. Signed-off-by: Olof Johansson

all: Update copyright header in all files

2019-01-24T08:37:47Z

This patch updates copyright header in all files as follows: 1. Makes "SPDX-License-Identifier: BSD-2-Clause" as first line 2. Change copyright year to 2019 for Western Digital Signed-off-by: Anup Patel

Initial commit.

2018-12-11T13:54:06Z

Signed-off-by: Anup Patel