Squash commits for public release

boot/libboot/abi/drivers.h

@@ -0,0 +1,29 @@
+#ifndef _BOOT_LIBBOOT_ABI_DRIVERS_H
+#define _BOOT_LIBBOOT_ABI_DRIVERS_H
+
+#include <libboot/types.h>
+
+#define MASKDEFINE(N, P, S) \
+    N##_POS = (P),          \
+    N##_SIZE = (S),         \
+    N##_MASK = ((~(~0 << (S))) << (P))
+
+#define TOKEN_PASTE_IMPL(x, y) x##y
+#define TOKEN_PASTE(x, y) TOKEN_PASTE_IMPL(x, y)
+#define SKIP(x, y) char TOKEN_PASTE(prefix, __LINE__)[y - x - 8]
+
+struct drive_desc {
+    void* init;
+    void* read;
+    void* write;
+};
+typedef struct drive_desc drive_desc_t;
+
+struct fs_desc {
+    int (*get_inode)(drive_desc_t* drive_desc, const char* path, void* file_inode);
+    int (*read)(drive_desc_t* drive_desc, const char* path, uint8_t* buf, uint32_t from, uint32_t len);
+    int (*read_from_inode)(drive_desc_t* drive_desc, void* file_inode, uint8_t* buf, uint32_t from, uint32_t len);
+};
+typedef struct fs_desc fs_desc_t;
+
+#endif // _BOOT_LIBBOOT_ABI_DRIVERS_H