diff options
| author | James Bottomley <jejb@raven.il.steeleye.com> | 2002-12-27 23:19:05 -0600 |
|---|---|---|
| committer | James Bottomley <jejb@raven.il.steeleye.com> | 2002-12-27 23:19:05 -0600 |
| commit | 339d617ff03e2cc4326526f6ff395947b41d920b (patch) | |
| tree | 4222859cc1a7078defad5599d5c4e28ad7ea2976 /include | |
| parent | b24fc5b28cb83f3133c5d85114adf84405543599 (diff) | |
boot with small GDT
Switch to larger operating GDT after moving to protected mode
This is necessary to boot on certain subarchs (voyager)
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-i386/desc.h | 1 | ||||
| -rw-r--r-- | include/asm-i386/segment.h | 8 |
2 files changed, 9 insertions, 0 deletions
diff --git a/include/asm-i386/desc.h b/include/asm-i386/desc.h index 77f2b1c0ec46..d42e28c1e3fa 100644 --- a/include/asm-i386/desc.h +++ b/include/asm-i386/desc.h @@ -16,6 +16,7 @@ extern struct desc_struct cpu_gdt_table[NR_CPUS][GDT_ENTRIES]; struct Xgt_desc_struct { unsigned short size; unsigned long address __attribute__((packed)); + unsigned short pad; } __attribute__ ((packed)); extern struct Xgt_desc_struct idt_descr, cpu_gdt_descr[NR_CPUS]; diff --git a/include/asm-i386/segment.h b/include/asm-i386/segment.h index f6949fb109d9..3f272860a6b3 100644 --- a/include/asm-i386/segment.h +++ b/include/asm-i386/segment.h @@ -71,6 +71,14 @@ #define GDT_SIZE (GDT_ENTRIES * 8) +/* Simple and small GDT entries for booting only */ + +#define GDT_ENTRY_BOOT_CS 2 +#define __BOOT_CS (GDT_ENTRY_BOOT_CS * 8) + +#define GDT_ENTRY_BOOT_DS (GDT_ENTRY_BOOT_CS + 1) +#define __BOOT_DS (GDT_ENTRY_BOOT_DS * 8) + /* * The interrupt descriptor table has room for 256 idt's, * the global descriptor table is dependent on the number |