[PATCH v3 02/31] arm64: Kernel booting and initialisation

On 09/10/2012 01:53 AM, Jean-Christophe PLAGNIOL-VILLARD wrote:

On 19:29 Sun 09 Sep     , Nicolas Pitre wrote:

quoted

On Sun, 9 Sep 2012, Jean-Christophe PLAGNIOL-VILLARD wrote:

quoted

On 17:26 Fri 07 Sep     , Catalin Marinas wrote:

quoted

+4. Call the kernel image
+------------------------
+
+Requirement: MANDATORY
+
+The decompressed kernel image contains a 32-byte header as follows:
+
+  u32 magic	= 0x14000008;	/* branch to stext, little-endian */
+  u32 res0	= 0;		/* reserved */
+  u64 text_offset;		/* Image load offset */
+  u64 res1	= 0;		/* reserved */
+  u64 res2	= 0;		/* reserved */

we need to have a magic to known it's a arm64 kernel

You have it: it's 0x14000008 at the beginning.

fragile

Others have commented on the relocatable kernel non-issue. But to this 
part, also bear in mind that Catalin pointed out boot standardization 
work may change how some AArch64 systems ultimately end up booting.

Thanks,

Jon.