LXR uboot/arch/powerpc/cpu/mpc8xx/commproc.c

   1/*
   2 * (C) Copyright 2000-2002
   3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#include <common.h>
   9#include <commproc.h>
  10
  11DECLARE_GLOBAL_DATA_PTR;
  12
  13#ifdef CONFIG_SYS_ALLOC_DPRAM
  14
  15int dpram_init (void)
  16{
  17        /* Reclaim the DP memory for our use. */
  18        gd->arch.dp_alloc_base = CPM_DATAONLY_BASE;
  19        gd->arch.dp_alloc_top  = CPM_DATAONLY_BASE + CPM_DATAONLY_SIZE;
  20
  21        return (0);
  22}
  23
  24/* Allocate some memory from the dual ported ram.  We may want to
  25 * enforce alignment restrictions, but right now everyone is a good
  26 * citizen.
  27 */
  28uint dpram_alloc (uint size)
  29{
  30        uint addr = gd->arch.dp_alloc_base;
  31
  32        if ((gd->arch.dp_alloc_base + size) >= gd->arch.dp_alloc_top)
  33                return (CPM_DP_NOSPACE);
  34
  35        gd->arch.dp_alloc_base += size;
  36
  37        return addr;
  38}
  39
  40uint dpram_base (void)
  41{
  42        return gd->arch.dp_alloc_base;
  43}
  44
  45/* Allocate some memory from the dual ported ram.  We may want to
  46 * enforce alignment restrictions, but right now everyone is a good
  47 * citizen.
  48 */
  49uint dpram_alloc_align (uint size, uint align)
  50{
  51        uint addr, mask = align - 1;
  52
  53        addr = (gd->arch.dp_alloc_base + mask) & ~mask;
  54
  55        if ((addr + size) >= gd->arch.dp_alloc_top)
  56                return (CPM_DP_NOSPACE);
  57
  58        gd->arch.dp_alloc_base = addr + size;
  59
  60        return addr;
  61}
  62
  63uint dpram_base_align (uint align)
  64{
  65        uint mask = align - 1;
  66
  67        return (gd->arch.dp_alloc_base + mask) & ~mask;
  68}
  69#endif  /* CONFIG_SYS_ALLOC_DPRAM */
  70