From: Ian Campbell Date: Tue, 19 Feb 2008 11:12:30 +0000 (+0000) Subject: x86: boot protocol updates X-Git-Tag: v2.6.26-rc1~1154^2~569 X-Git-Url: http://git.samba.org/samba.git/?p=sfrench%2Fcifs-2.6.git;a=commitdiff_plain;h=87253d1b4f2b5a29bdfc6275b9fb52a47d72df64;hp=bc0a733facbbde6c464e3ba5e165607fe4824cca x86: boot protocol updates Also update field names to simply payload_{offset,length} so as to not rule out uncompressed images. Signed-off-by: Ian Campbell Cc: H. Peter Anvin Cc: Jeremy Fitzhardinge Cc: virtualization@lists.linux-foundation.org Signed-off-by: Ingo Molnar --- diff --git a/Documentation/i386/boot.txt b/Documentation/i386/boot.txt index 05c24dfd7ecf..2eb16100bb3f 100644 --- a/Documentation/i386/boot.txt +++ b/Documentation/i386/boot.txt @@ -170,8 +170,8 @@ Offset Proto Name Meaning 0238/4 2.06+ cmdline_size Maximum size of the kernel command line 023C/4 2.07+ hardware_subarch Hardware subarchitecture 0240/8 2.07+ hardware_subarch_data Subarchitecture-specific data -0248/4 2.08+ compressed_payload_offset -024C/4 2.08+ compressed_payload_length +0248/4 2.08+ payload_offset Offset of kernel payload +024C/4 2.08+ payload_length Length of kernel payload (1) For backwards compatibility, if the setup_sects field contains 0, the real value is 4. @@ -514,22 +514,24 @@ Protocol: 2.07+ A pointer to data that is specific to hardware subarch -Field name: compressed_payload_offset +Field name: payload_offset Type: read Offset/size: 0x248/4 Protocol: 2.08+ If non-zero then this field contains the offset from the end of the - real-mode code to the compressed payload. The compression format - should be determined using the standard magic number, currently only - gzip is used. + real-mode code to the payload. + + The payload may be compressed. The format of both the compressed and + uncompressed data should be determined using the standard magic + numbers. Currently only gzip compressed ELF is used. -Field name: compressed_payload_length +Field name: payload_length Type: read Offset/size: 0x24c/4 Protocol: 2.08+ - The length of the compressed payload. + The length of the payload. **** THE IMAGE CHECKSUM diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S index 40c91bb483e1..6d2df8d61c54 100644 --- a/arch/x86/boot/header.S +++ b/arch/x86/boot/header.S @@ -224,10 +224,8 @@ hardware_subarch: .long 0 # subarchitecture, added with 2.07 hardware_subarch_data: .quad 0 -compressed_payload_offset: - .long input_data -compressed_payload_length: - .long input_data_end-input_data +payload_offset: .long input_data +payload_length: .long input_data_end-input_data # End of setup header #####################################################