We already have some PBL MCI implementations in barebox, but none
are used for chainloading a barebox from a file system.
In preparation for supporting first stage boot on SoCs where it's
customary for both the BootROM and first stage bootloader to load the
follow-up stage from FAT, add a very basic block I/O API that MCI
drivers can implement.
Signed-off-by: Ahmad Fatoum <ahmad@xxxxxx>
---
include/pbl.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/pbl.h b/include/pbl.h
index 787bd8293ff1..7cc162dfd039 100644
--- a/include/pbl.h
+++ b/include/pbl.h
@@ -7,6 +7,8 @@
#ifndef __PBL_H__
#define __PBL_H__
+#include <linux/types.h>
+
extern unsigned long free_mem_ptr;
extern unsigned long free_mem_end_ptr;
@@ -14,6 +16,10 @@ void pbl_barebox_uncompress(void *dest, void *compressed_start, unsigned int len
#ifdef __PBL__
#define IN_PBL 1
+struct pbl_bio {
+ void *priv;
+ int (*read)(struct pbl_bio *bio, off_t block_off, void *buf, unsigned int nblocks);
+};
#else
#define IN_PBL 0
#endif
--
2.20.1
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