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-rw-r--r--include/grub/dma.h44
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