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/*
* Copyright (C) 2024 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/** @file
*
* EFI multiprocessor API implementation
*
*/
#include <string.h>
#include <errno.h>
#include <ipxe/mp.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Protocol/MpService.h>
/** EFI multiprocessor function call data */
struct efi_mp_func_data {
/** Multiprocessor function */
mp_addr_t func;
/** Opaque data pointer */
mp_addr_t opaque;
};
/** Multiprocessor services protocol */
static EFI_MP_SERVICES_PROTOCOL *efimp;
EFI_REQUEST_PROTOCOL ( EFI_MP_SERVICES_PROTOCOL, &efimp );
/**
* Call multiprocessor function on current CPU
*
* @v buffer Multiprocessor function call data
*/
static EFIAPI VOID efi_mp_call ( VOID *buffer ) {
struct efi_mp_func_data *data = buffer;
/* Call multiprocessor function */
mp_call ( data->func, data->opaque );
}
/**
* Execute a multiprocessor function on the boot processor
*
* @v func Multiprocessor function
* @v opaque Opaque data pointer
*/
static void efi_mp_exec_boot ( mp_func_t func, void *opaque ) {
struct efi_mp_func_data data;
/* Construct call data */
data.func = mp_address ( func );
data.opaque = mp_address ( opaque );
/* Call multiprocesor function */
efi_mp_call ( &data );
}
/**
* Start a multiprocessor function on all application processors
*
* @v func Multiprocessor function
* @v opaque Opaque data pointer
*/
static void efi_mp_start_all ( mp_func_t func, void *opaque ) {
struct efi_mp_func_data data;
EFI_STATUS efirc;
int rc;
/* Do nothing if MP services is not present */
if ( ! efimp ) {
DBGC ( func, "EFIMP has no multiprocessor services\n" );
return;
}
/* Construct call data */
data.func = mp_address ( func );
data.opaque = mp_address ( opaque );
/* Start up all application processors */
if ( ( efirc = efimp->StartupAllAPs ( efimp, efi_mp_call, FALSE, NULL,
0, &data, NULL ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( func, "EFIMP could not start APs: %s\n",
strerror ( rc ) );
return;
}
}
PROVIDE_MPAPI_INLINE ( efi, mp_address );
PROVIDE_MPAPI ( efi, mp_exec_boot, efi_mp_exec_boot );
PROVIDE_MPAPI ( efi, mp_start_all, efi_mp_start_all );
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