[U-Boot] [PATCH 2/2] fs: cbfs: add file_cbfs_init_ext(..)

[Christian Gmeiner]

On Intel Apollolake the BIOS region on the flash is mapped right below 4GiB
in the address space. However, 256KiB right below 4GiB is decoded by read-only
SRAM. For this case we need a new API to handle this case - file_cbfs_init_ext().

This patch only does the groundwork to fix this issue. The caller of this
API is responsible to calucalte/determine the correct cbfs addresses.

Signed-off-by: Christian Gmeiner <christian.gmeiner at gmail.com>
---
 fs/cbfs/cbfs.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/fs/cbfs/cbfs.c b/fs/cbfs/cbfs.c
index c60a8d5dc1..97272ce5e8 100644
--- a/fs/cbfs/cbfs.c
+++ b/fs/cbfs/cbfs.c
@@ -193,6 +193,19 @@ void file_cbfs_init(uintptr_t end_of_rom)
 		initialized = 1;
 }
 
+void file_cbfs_init_ext(uintptr_t header, uintptr_t cbfs_start, u32 cbfs_size)
+{
+	initialized = 0;
+
+	if (file_cbfs_load_header(header, &cbfs_header))
+		return;
+
+	file_cbfs_fill_cache((u8 *)cbfs_start, cbfs_size, cbfs_header.align);
+
+	if (file_cbfs_result == CBFS_SUCCESS)
+		initialized = 1;
+}
+
 const struct cbfs_header *file_cbfs_get_header(void)
 {
 	if (initialized) {
-- 
2.20.1