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Kernel/riscv64: Implement arch_specific_{reboot,shutdown} using the SBI

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We first try to use the newer "SRST" extension for rebooting and
shutting down and if that fails, we try to shutdown using the legacy
"System Shutdown" extension (which can't reboot, so we always shutdown).
The kernel will halt, if we return from here due to all attempts at
rebooting / shutting down failing.
This commit is contained in:
Sönke Holz 2024-01-04 19:00:14 +01:00 • committed by Andrew Kaster
parent 21b2d1de65
commit 8547813b6d
1 changed files with 9 additions and 2 deletions
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11
Kernel/Arch/riscv64/PowerState.cpp
View file

@ -5,17 +5,24 @@
*/
#include <Kernel/Arch/PowerState.h>
#include <Kernel/Arch/riscv64/SBI.h>
namespace Kernel {
void arch_specific_reboot()
{
TODO_RISCV64();
auto ret = SBI::SystemReset::system_reset(SBI::SystemReset::ResetType::ColdReboot, SBI::SystemReset::ResetReason::NoReason);
dbgln("SBI: Failed to reboot: {}", ret);
dbgln("SBI: Attempting to shut down using the legacy extension...");
SBI::Legacy::shutdown();
}
void arch_specific_poweroff()
{
TODO_RISCV64();
auto ret = SBI::SystemReset::system_reset(SBI::SystemReset::ResetType::Shutdown, SBI::SystemReset::ResetReason::NoReason);
dbgln("SBI: Failed to shut down: {}", ret);
dbgln("SBI: Attempting to shut down using the legacy extension...");
SBI::Legacy::shutdown();
}
}