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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:29:51 +0000 |
commit | 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e (patch) | |
tree | 32451fa3cdd9321fb2591fada9891b2cb70a9cd1 /include/grub/dma.h | |
parent | Initial commit. (diff) | |
download | grub2-3e86199209a10ed6555e30b8b71884cb7cc45ed2.tar.xz grub2-3e86199209a10ed6555e30b8b71884cb7cc45ed2.zip |
Adding upstream version 2.06.upstream/2.06upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | include/grub/dma.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/include/grub/dma.h b/include/grub/dma.h new file mode 100644 index 0000000..19992eb --- /dev/null +++ b/include/grub/dma.h @@ -0,0 +1,44 @@ +/* + * 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 |