diff options
Diffstat (limited to 'u-boot/arch/powerpc/cpu/mpc8xx/commproc.c')
-rw-r--r-- | u-boot/arch/powerpc/cpu/mpc8xx/commproc.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/u-boot/arch/powerpc/cpu/mpc8xx/commproc.c b/u-boot/arch/powerpc/cpu/mpc8xx/commproc.c new file mode 100644 index 0000000..5fe01ff --- /dev/null +++ b/u-boot/arch/powerpc/cpu/mpc8xx/commproc.c @@ -0,0 +1,85 @@ +/* + * (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 */ |