From 6e7a315eb67cb6c113cf37e1d66c4f11a51a2b3e Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:51 +0200 Subject: Adding upstream version 2.06. Signed-off-by: Daniel Baumann --- include/grub/dma.h | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 include/grub/dma.h (limited to 'include/grub/dma.h') 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 . + */ + +#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 -- cgit v1.2.3