diff options
Diffstat (limited to 'Documentation/x86')
| -rw-r--r-- | Documentation/x86/boot.rst | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/Documentation/x86/boot.rst b/Documentation/x86/boot.rst index e0dc2ffb7094..71ecb6d0b3a6 100644 --- a/Documentation/x86/boot.rst +++ b/Documentation/x86/boot.rst @@ -835,14 +835,14 @@ Protocol: 2.09+ chunks of memory are occupied by kernel data. Thus setup_indirect struct and SETUP_INDIRECT type were introduced in - protocol 2.15. + protocol 2.15:: - struct setup_indirect { - __u32 type; - __u32 reserved; /* Reserved, must be set to zero. */ - __u64 len; - __u64 addr; - }; + struct setup_indirect { + __u32 type; + __u32 reserved; /* Reserved, must be set to zero. */ + __u64 len; + __u64 addr; + }; The type member is a SETUP_INDIRECT | SETUP_* type. However, it cannot be SETUP_INDIRECT itself since making the setup_indirect a tree structure @@ -850,19 +850,19 @@ Protocol: 2.09+ and stack space can be limited in boot contexts. Let's give an example how to point to SETUP_E820_EXT data using setup_indirect. - In this case setup_data and setup_indirect will look like this: - - struct setup_data { - __u64 next = 0 or <addr_of_next_setup_data_struct>; - __u32 type = SETUP_INDIRECT; - __u32 len = sizeof(setup_data); - __u8 data[sizeof(setup_indirect)] = struct setup_indirect { - __u32 type = SETUP_INDIRECT | SETUP_E820_EXT; - __u32 reserved = 0; - __u64 len = <len_of_SETUP_E820_EXT_data>; - __u64 addr = <addr_of_SETUP_E820_EXT_data>; + In this case setup_data and setup_indirect will look like this:: + + struct setup_data { + __u64 next = 0 or <addr_of_next_setup_data_struct>; + __u32 type = SETUP_INDIRECT; + __u32 len = sizeof(setup_data); + __u8 data[sizeof(setup_indirect)] = struct setup_indirect { + __u32 type = SETUP_INDIRECT | SETUP_E820_EXT; + __u32 reserved = 0; + __u64 len = <len_of_SETUP_E820_EXT_data>; + __u64 addr = <addr_of_SETUP_E820_EXT_data>; + } } - } .. note:: SETUP_INDIRECT | SETUP_NONE objects cannot be properly distinguished @@ -965,7 +965,7 @@ expected to copy into a setup_data chunk. All kernel_info data should be part of this structure. Fixed size data have to be put before kernel_info_var_len_data label. Variable size data have to be put after kernel_info_var_len_data label. Each chunk of variable size data has to -be prefixed with header/magic and its size, e.g.: +be prefixed with header/magic and its size, e.g.:: kernel_info: .ascii "LToP" /* Header, Linux top (structure). */ |