starfive-tech/opensbi.git/lib/utils/reset, branch StarFive_JH7100_generic

lib: utils: missing initialization in thead_reset_init

2021-06-11T13:50:16+00:00

If property csr-copy does not exist, fdt_getprop() will return NULL and cnt will have a random value from the stack. Call clone_csrs() only if cnt is initialized to a non-zero value. Fixes: 49e422c5ad7a ("lib: utils: reset: Add T-HEAD sample platform reset driver") Signed-off-by: Heinrich Schuchardt Reviewed-by: Anup Patel

lib: utils: Try other FDT drivers when we see SBI_ENODEV

2021-05-24T10:19:21+00:00

We should try other FDT drivers when we see SBI_ENODEV returned by cold_init() of FDT driver. Signed-off-by: Anup Patel Reviewed-by: Atish Patra Reviewed-by: Xiang W

lib: sbi: Simplify system reset platform operations

2021-04-28T11:55:00+00:00

Instead of having system_reset_check() and system_reset() callbacks in platform operations, it will be much simpler for reset driver to directly register these operations as a device to the sbi_system implementation. Signed-off-by: Anup Patel Reviewed-by: Alistair Francis

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

2021-04-22T09:43:53+00:00

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

lib: sbi: Improve system reset platform operations

2020-12-01T11:40:31+00:00

To implement the SBI SRST extension, we need two platform operations for system reset: 1) system_reset_check() - This operation will check whether given reset type and reason are supported by the platform 2) system_reset() - This operation will do the actual platform system reset and it will not return if reset type and reason are supported by the platform This patch updates system reset related code everywhere as-per above. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: utils: Extend fdt_find_match() Implementation

2020-05-23T05:06:33+00:00

We extend fdt_find_match() implementation by adding node offset parameter which represents the first node to match from. The improved fdt_find_match() can be used to find multiple match nodes. Signed-off-by: Anup Patel Reviewed-by: Atish Patra

lib: utils: Add simple FDT reset framework

2020-05-01T05:01:37+00:00

We add simple reset framework which will select and use reset driver based on details in FDT passed by previous booting stage. Signed-off-by: Anup Patel Reviewed-by: Atish Patra