From: Sean Anderson <seanga2@gmail.com>
To: u-boot@lists.denx.de
Subject: [PATCH 1/5] risv: add missing SBI extension definitions
Date: Sat, 6 Mar 2021 16:48:39 -0500 [thread overview]
Message-ID: <5d5199d6-bdb8-9274-c36f-e56b4f674302@gmail.com> (raw)
In-Reply-To: <CAEUhbmX8QGu7gh-THa1zxxHzFDMPYTf=0O-cAXvZv4iZEAUxAg@mail.gmail.com>
On 3/6/21 12:59 AM, Bin Meng wrote:
> On Fri, Mar 5, 2021 at 1:02 AM Heinrich Schuchardt <xypron.glpk@gmx.de> wrote:
>>
>> Add the System Reset Extension and the Hart State Management Extension
>> definitions.
>>
>> Add missing RFENCE Extension enum values.
>>
>> The SBI 0.1 extension constants are needed for for the sbi command. Remove
>> an #ifdef.
>>
>> Cf. https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.adoc
>>
>> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
>> ---
>> arch/riscv/include/asm/sbi.h | 36 ++++++++++++++++++++++++++++++++++--
>> 1 file changed, 34 insertions(+), 2 deletions(-)
>>
>
> U-Boot does not need HSM.
(yet)
As far as I can tell, it's completely conforming for all harts but one
to be put into the STOPPED state by the SBI (with the expectation that
U-Boot or something else start them). Also, while we currently figure
out which harts to start via device tree passed from SBI, that behavior
is not standardized. Going forward, I we may see some SBI
implementations which communicate this sort of info through HSM. Though
this has not happened yet...
--Sean
next prev parent reply other threads:[~2021-03-06 21:48 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 17:00 [PATCH 0/5] riscv: enable SBI system reset Heinrich Schuchardt
2021-03-04 17:00 ` [PATCH 1/5] risv: add missing SBI extension definitions Heinrich Schuchardt
2021-03-04 23:28 ` Sean Anderson
2021-03-06 5:33 ` Heinrich Schuchardt
2021-03-06 5:59 ` Bin Meng
2021-03-06 21:48 ` Sean Anderson [this message]
2021-03-04 17:00 ` [PATCH 2/5] cmd/sbi: use constants instead of numerical values Heinrich Schuchardt
2021-03-04 23:31 ` Sean Anderson
2021-03-08 6:25 ` Leo Liang
2021-03-04 17:00 ` [PATCH 3/5] sysreset: provide SBI based sysreset driver Heinrich Schuchardt
2021-03-04 23:50 ` Sean Anderson
2021-03-06 7:18 ` Heinrich Schuchardt
2021-03-06 16:40 ` Sean Anderson
2021-03-04 17:00 ` [PATCH 4/5] pinctrl: K210_PINCTRL depends on REGMAP and on SYSCON Heinrich Schuchardt
2021-03-04 23:15 ` Sean Anderson
2021-03-08 6:29 ` Leo Liang
2021-03-04 17:00 ` [PATCH 5/5] maix: enable SBI system reset for MAIX Heinrich Schuchardt
2021-03-04 23:24 ` Sean Anderson
2021-03-06 7:31 ` Heinrich Schuchardt
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