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Use one of the bi_spare entries for the DIG64 HCDP table address.

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The HCDP table is one (non-proprietary) way for the platform to
inform the OS about headless operation. This field would normally
hold the address as can be found by scanning the EFI system table,
which we also pass to the kernel. The apparent duplication allows
us to synthesize a HCDP table in the loader by whatever means we
can think of, including relocating the platform table into pre-
mapped address space. In short: it gives us more freedom.

Approved by: re (blanket)
This commit is contained in:
Marcel Moolenaar 2002-12-08 20:32:56 +00:00
parent c0fabbfb90
commit 7b54e1ca53
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=107685
1 changed files with 2 additions and 1 deletions
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3
sys/ia64/include/bootinfo.h
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@ -46,7 +46,8 @@
struct bootinfo {
u_int64_t bi_magic; /* BOOTINFO_MAGIC */
u_int64_t bi_version; /* version 1 */
u_int64_t bi_spare[7]; /* was: name of booted kernel */
u_int64_t bi_spare[6]; /* was: name of booted kernel */
u_int64_t bi_hcdp; /* DIG64 HCDP table */
u_int64_t bi_fpswa; /* FPSWA interface */
u_int64_t bi_boothowto; /* value for boothowto */
u_int64_t bi_systab; /* pa of EFI system table */