diff options
Diffstat (limited to 'i386/i386/seg.h')
| -rw-r--r-- | i386/i386/seg.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/i386/i386/seg.h b/i386/i386/seg.h index 6f3d5af9..b1a14fe4 100644 --- a/i386/i386/seg.h +++ b/i386/i386/seg.h @@ -59,12 +59,32 @@ struct real_descriptor { base_high:8; /* base 24..31 */ }; +#ifdef __x86_64__ +struct real_descriptor64 { + unsigned int limit_low:16, /* limit 0..15 */ + base_low:16, /* base 0..15 */ + base_med:8, /* base 16..23 */ + access:8, /* access byte */ + limit_high:4, /* limit 16..19 */ + granularity:4, /* granularity */ + base_high:8, /* base 24..31 */ + base_ext:32, /* base 32..63 */ + reserved1:8, + zero:5, + reserved2:19; +}; +#endif + struct real_gate { unsigned int offset_low:16, /* offset 0..15 */ selector:16, word_count:8, access:8, offset_high:16; /* offset 16..31 */ +#ifdef __x86_64__ + unsigned int offset_ext:32, /* offset 32..63 */ + reserved:32; +#endif }; #endif /* !__ASSEMBLER__ */ @@ -185,6 +205,40 @@ fill_descriptor(struct real_descriptor *_desc, unsigned base, unsigned limit, #endif /* MACH_PV_DESCRIPTORS */ } +#ifdef __x86_64__ +MACH_INLINE void +fill_descriptor64(struct real_descriptor64 *_desc, unsigned long base, unsigned limit, + unsigned char access, unsigned char sizebits) +{ + /* TODO: when !MACH_PV_DESCRIPTORS, setting desc and just memcpy isn't simpler actually */ +#ifdef MACH_PV_DESCRIPTORS + struct real_descriptor64 __desc, *desc = &__desc; +#else /* MACH_PV_DESCRIPTORS */ + struct real_descriptor64 *desc = _desc; +#endif /* MACH_PV_DESCRIPTORS */ + if (limit > 0xfffff) + { + limit >>= 12; + sizebits |= SZ_G; + } + desc->limit_low = limit & 0xffff; + desc->base_low = base & 0xffff; + desc->base_med = (base >> 16) & 0xff; + desc->access = access | ACC_P; + desc->limit_high = limit >> 16; + desc->granularity = sizebits; + desc->base_high = base >> 24; + desc->base_ext = base >> 32; + desc->reserved1 = 0; + desc->zero = 0; + desc->reserved2 = 0; +#ifdef MACH_PV_DESCRIPTORS + if (hyp_do_update_descriptor(kv_to_ma(_desc), *(uint64_t*)desc)) + panic("couldn't update descriptor(%lu to %08lx%08lx)\n", (vm_offset_t) kv_to_ma(_desc), *(((unsigned long*)desc)+1), *(unsigned long *)desc); +#endif /* MACH_PV_DESCRIPTORS */ +} +#endif + /* Fill a gate with particular values. */ MACH_INLINE void fill_gate(struct real_gate *gate, unsigned offset, unsigned short selector, @@ -195,6 +249,10 @@ fill_gate(struct real_gate *gate, unsigned offset, unsigned short selector, gate->word_count = word_count; gate->access = access | ACC_P; gate->offset_high = (offset >> 16) & 0xffff; +#ifdef __x86_64__ + gate->offset_ext = offset >> 32; + gate->reserved = 0; +#endif } #endif /* !__ASSEMBLER__ */ |