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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2008,2009 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/>.
*/
#ifndef GRUB_DMA_H
#define GRUB_DMA_H 1
struct grub_pci_dma_chunk;
struct grub_pci_dma_chunk *EXPORT_FUNC(grub_memalign_dma32) (grub_size_t align,
grub_size_t size);
void EXPORT_FUNC(grub_dma_free) (struct grub_pci_dma_chunk *ch);
volatile void *EXPORT_FUNC(grub_dma_get_virt) (struct grub_pci_dma_chunk *ch);
grub_uint32_t EXPORT_FUNC(grub_dma_get_phys) (struct grub_pci_dma_chunk *ch);
static inline void *
grub_dma_phys2virt (grub_uint32_t phys, struct grub_pci_dma_chunk *chunk)
{
return ((grub_uint8_t *) grub_dma_get_virt (chunk)
+ (phys - grub_dma_get_phys (chunk)));
}
static inline grub_uint32_t
grub_dma_virt2phys (volatile void *virt, struct grub_pci_dma_chunk *chunk)
{
return (((grub_uint8_t *) virt - (grub_uint8_t *) grub_dma_get_virt (chunk))
+ grub_dma_get_phys (chunk));
}
#endif
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