commproc.c
2.06 KB
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/*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 (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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <commproc.h>
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_SYS_ALLOC_DPRAM
int dpram_init (void)
{
/* Reclaim the DP memory for our use. */
gd->dp_alloc_base = CPM_DATAONLY_BASE;
gd->dp_alloc_top = CPM_DATAONLY_BASE + CPM_DATAONLY_SIZE;
return (0);
}
/* Allocate some memory from the dual ported ram. We may want to
* enforce alignment restrictions, but right now everyone is a good
* citizen.
*/
uint dpram_alloc (uint size)
{
uint addr = gd->dp_alloc_base;
if ((gd->dp_alloc_base + size) >= gd->dp_alloc_top)
return (CPM_DP_NOSPACE);
gd->dp_alloc_base += size;
return addr;
}
uint dpram_base (void)
{
return gd->dp_alloc_base;
}
/* Allocate some memory from the dual ported ram. We may want to
* enforce alignment restrictions, but right now everyone is a good
* citizen.
*/
uint dpram_alloc_align (uint size, uint align)
{
uint addr, mask = align - 1;
addr = (gd->dp_alloc_base + mask) & ~mask;
if ((addr + size) >= gd->dp_alloc_top)
return (CPM_DP_NOSPACE);
gd->dp_alloc_base = addr + size;
return addr;
}
uint dpram_base_align (uint align)
{
uint mask = align - 1;
return (gd->dp_alloc_base + mask) & ~mask;
}
#endif /* CONFIG_SYS_ALLOC_DPRAM */