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okuji 2002-12-27 08:53:07 +00:00
commit 6a161fa938
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kern/loader.c Normal file
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/*
* PUPA -- Preliminary Universal Programming Architecture for GRUB
* Copyright (C) 2002 Yoshinori K. Okuji <okuji@enbug.org>
*
* PUPA 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
* (at your option) 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 PUPA; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <pupa/loader.h>
#include <pupa/misc.h>
#include <pupa/mm.h>
#include <pupa/err.h>
static pupa_err_t (*pupa_loader_load_module_func) (int argc, char *argv[]);
static pupa_err_t (*pupa_loader_boot_func) (void);
static pupa_err_t (*pupa_loader_unload_func) (void);
static int pupa_loader_loaded;
void
pupa_loader_set (pupa_err_t (*load_module) (int argc, char *argv[]),
pupa_err_t (*boot) (void),
pupa_err_t (*unload) (void))
{
if (pupa_loader_loaded && pupa_loader_unload_func)
if (pupa_loader_unload_func () != PUPA_ERR_NONE)
return;
pupa_loader_load_module_func = load_module;
pupa_loader_boot_func = boot;
pupa_loader_unload_func = unload;
pupa_loader_loaded = 1;
}
pupa_err_t
pupa_loader_load_module (int argc, char *argv[])
{
if (! pupa_loader_loaded)
return pupa_error (PUPA_ERR_NO_KERNEL, "no loaded kernel");
if (! pupa_loader_load_module_func)
return pupa_error (PUPA_ERR_BAD_OS, "module not supported");
return pupa_loader_load_module_func (argc, argv);
}
pupa_err_t
pupa_loader_boot (void)
{
if (! pupa_loader_loaded)
return pupa_error (PUPA_ERR_NO_KERNEL, "no loaded kernel");
return (pupa_loader_boot_func) ();
}