mirror of https://github.com/ipxe/ipxe.git
[riscv] Add support for reboot and power off via SBI
Signed-off-by: Michael Brown <mcb30@ipxe.org>pull/875/merge
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b23204b383
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@ -14,6 +14,8 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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* @{
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* @{
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*/
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*/
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#define ERRFILE_sbi_reboot ( ERRFILE_ARCH | ERRFILE_CORE | 0x00000000 )
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/** @} */
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/** @} */
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#endif /* _BITS_ERRFILE_H */
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#endif /* _BITS_ERRFILE_H */
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@ -0,0 +1,14 @@
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#ifndef _BITS_REBOOT_H
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#define _BITS_REBOOT_H
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/** @file
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*
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* RISCV-specific reboot API implementations
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <ipxe/sbi_reboot.h>
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#endif /* _BITS_REBOOT_H */
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@ -148,6 +148,16 @@ sbi_ecall_3 ( int eid, int fid, unsigned long p0, unsigned long p1,
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return ret;
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return ret;
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}
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}
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/** Convert an SBI error code to an iPXE status code */
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#define ESBI( error ) EPLATFORM ( EINFO_EPLATFORM, error )
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/** System reset extension */
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#define SBI_SRST SBI_EID ( 'S', 'R', 'S', 'T' )
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#define SBI_SRST_SYSTEM_RESET 0x00 /**< Reset system */
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#define SBI_RESET_SHUTDOWN 0x00000000 /**< Shutdown */
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#define SBI_RESET_COLD 0x00000001 /**< Cold reboot */
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#define SBI_RESET_WARM 0x00000002 /**< Warm reboot */
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/** Debug console extension */
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/** Debug console extension */
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#define SBI_DBCN SBI_EID ( 'D', 'B', 'C', 'N' )
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#define SBI_DBCN SBI_EID ( 'D', 'B', 'C', 'N' )
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#define SBI_DBCN_WRITE 0x00 /**< Console Write */
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#define SBI_DBCN_WRITE 0x00 /**< Console Write */
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@ -0,0 +1,18 @@
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#ifndef _IPXE_BIOS_REBOOT_H
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#define _IPXE_BIOS_REBOOT_H
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/** @file
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*
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* Supervisor Binary Interface (SBI) reboot mechanism
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#ifdef REBOOT_SBI
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#define REBOOT_PREFIX_sbi
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#else
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#define REBOOT_PREFIX_sbi __sbi_
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#endif
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#endif /* _IPXE_BIOS_REBOOT_H */
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@ -0,0 +1,76 @@
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/*
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* Copyright (C) 2024 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/** @file
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*
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* Supervisor Binary Interface (SBI) reboot mechanism
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*
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*/
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#include <errno.h>
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#include <string.h>
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#include <ipxe/sbi.h>
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#include <ipxe/reboot.h>
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/**
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* Reboot system
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*
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* @v warm Perform a warm reboot
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*/
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static void sbi_reboot ( int warm ) {
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struct sbi_return ret;
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int rc;
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/* Reboot system */
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ret = sbi_ecall_2 ( SBI_SRST, SBI_SRST_SYSTEM_RESET,
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( warm ? SBI_RESET_WARM : SBI_RESET_COLD ), 0 );
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/* Any return is an error */
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rc = -ESBI ( ret.error );
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DBGC ( SBI_SRST, "SBI %s reset failed: %s\n",
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( warm ? "warm" : "cold" ), strerror ( rc ) );
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}
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/**
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* Power off system
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*
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* @ret rc Return status code
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*/
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static int sbi_poweroff ( void ) {
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struct sbi_return ret;
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int rc;
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/* Shut down system */
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ret = sbi_ecall_2 ( SBI_SRST, SBI_SRST_SYSTEM_RESET,
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SBI_RESET_SHUTDOWN, 0 );
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/* Any return is an error */
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rc = -ESBI ( ret.error );
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DBGC ( SBI_SRST, "SBI shutdown failed: %s\n", strerror ( rc ) );
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return rc;
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}
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PROVIDE_REBOOT ( sbi, reboot, sbi_reboot );
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PROVIDE_REBOOT ( sbi, poweroff, sbi_poweroff );
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