44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
/*
|
|
* 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
|