diff options
Diffstat (limited to 'arch/powerpc/include/asm/opal.h')
-rw-r--r-- | arch/powerpc/include/asm/opal.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h index ffb2036fcfb2..0a2ac85998d7 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -33,6 +33,28 @@ struct opal_takeover_args { u64 rd_loc; /* r11 */ }; +/* + * SG entry + * + * WARNING: The current implementation requires each entry + * to represent a block that is 4k aligned *and* each block + * size except the last one in the list to be as well. + */ +struct opal_sg_entry { + void *data; + long length; +}; + +/* sg list */ +struct opal_sg_list { + unsigned long num_entries; + struct opal_sg_list *next; + struct opal_sg_entry entry[]; +}; + +/* We calculate number of sg entries based on PAGE_SIZE */ +#define SG_ENTRIES_PER_NODE ((PAGE_SIZE - 16) / sizeof(struct opal_sg_entry)) + extern long opal_query_takeover(u64 *hal_size, u64 *hal_align); extern long opal_do_takeover(struct opal_takeover_args *args); |