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arm_coreboot: Support DMA.

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This is needed to support USB and some other busses.
This commit is contained in:
Vladimir Serbinenko 2017-05-08 22:06:04 +02:00
parent 656c3b0d7f
commit 265292f2b0
8 changed files with 155 additions and 25 deletions
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59
grub-core/kern/arm/coreboot/dma.c Normal file
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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2007,2009 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/dl.h>
#include <grub/dma.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/mm_private.h>
#include <grub/cache.h>
struct grub_pci_dma_chunk *
grub_memalign_dma32 (grub_size_t align, grub_size_t size)
{
void *ret;
if (align < 64)
align = 64;
size = ALIGN_UP (size, align);
ret = grub_memalign (align, size);
if (!ret)
return 0;
grub_arch_sync_dma_caches (ret, size);
return ret;
}
void
grub_dma_free (struct grub_pci_dma_chunk *ch)
{
grub_size_t size = (((struct grub_mm_header *) ch) - 1)->size * GRUB_MM_ALIGN;
grub_arch_sync_dma_caches (ch, size);
grub_free (ch);
}
volatile void *
grub_dma_get_virt (struct grub_pci_dma_chunk *ch)
{
return (void *) ch;
}
grub_uint32_t
grub_dma_get_phys (struct grub_pci_dma_chunk *ch)
{
return (grub_uint32_t) (grub_addr_t) ch;
}