summaryrefslogtreecommitdiff
path: root/sysdeps/standalone/i386/i386.h
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/standalone/i386/i386.h')
-rw-r--r--sysdeps/standalone/i386/i386.h326
1 files changed, 0 insertions, 326 deletions
diff --git a/sysdeps/standalone/i386/i386.h b/sysdeps/standalone/i386/i386.h
deleted file mode 100644
index 364e8abb3d..0000000000
--- a/sysdeps/standalone/i386/i386.h
+++ /dev/null
@@ -1,326 +0,0 @@
-/* Copyright (C) 1994, 1997 Free Software Foundation, Inc.
- Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil),
- On-Line Applications Research Corporation.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
-
-/* i386.h
- *
- * This file contains macros which are used to access i80386
- * registers which are not addressable by C. This file contains
- * functions which are useful to those developing target
- * specific support routines.
- */
-
-#ifndef i386_h__
-#define i386_h__
-
-typedef unsigned char unsigned8;
-typedef unsigned short unsigned16;
-typedef unsigned int unsigned32;
-
-#define disable_intr( isrlevel ) \
- { (isrlevel) = 0; \
- asm volatile ( "pushf ; \
- pop %0 ; \
- cli " \
- : "=r" ((isrlevel)) : "0" ((isrlevel)) ); \
- }
-
-
-#define enable_intr( isrlevel ) \
- { asm volatile ( "push %0 ; \
- popf " \
- : "=r" ((isrlevel)) : "0" ((isrlevel)) ); \
- }
-
-#define delay( _microseconds ) \
- { \
- unsigned32 _counter; \
- \
- _counter = (_microseconds); \
- \
- asm volatile ( "0: nop;" \
- " mov %0,%0 ;" \
- " loop 0" : "=c" (_counter) \
- : "0" (_counter) \
- ); \
- \
- }
-
-/* segment access functions */
-
-static inline unsigned16 get_cs()
-{
- register unsigned16 segment = 0;
-
- asm volatile ( "movw %%cs,%0" : "=r" (segment) : "0" (segment) );
-
- return segment;
-}
-
-static inline unsigned16 get_ds()
-{
- register unsigned16 segment = 0;
-
- asm volatile ( "movw %%ds,%0" : "=r" (segment) : "0" (segment) );
-
- return segment;
-}
-
-static inline unsigned16 get_es()
-{
- register unsigned16 segment = 0;
-
- asm volatile ( "movw %%es,%0" : "=r" (segment) : "0" (segment) );
-
- return segment;
-}
-
-static inline unsigned16 get_ss()
-{
- register unsigned16 segment = 0;
-
- asm volatile ( "movw %%ss,%0" : "=r" (segment) : "0" (segment) );
-
- return segment;
-}
-
-static inline unsigned16 get_fs()
-{
- register unsigned16 segment = 0;
-
- asm volatile ( "movw %%fs,%0" : "=r" (segment) : "0" (segment) );
-
- return segment;
-}
-
-static inline unsigned16 get_gs()
-{
- register unsigned16 segment = 0;
-
- asm volatile ( "movw %%gs,%0" : "=r" (segment) : "0" (segment) );
-
- return segment;
-}
-
-/* i80x86 I/O instructions */
-
-#define outport_byte( _port, _value ) \
- { register unsigned16 __port = _port; \
- register unsigned8 __value = _value; \
- \
- asm volatile ( "outb %0,%1" : "=a" (__value), "=d" (__port) \
- : "0" (__value), "1" (__port) \
- ); \
- }
-
-#define outport_word( _port, _value ) \
- { register unsigned16 __port = _port; \
- register unsigned16 __value = _value; \
- \
- asm volatile ( "outw %0,%1" : "=a" (__value), "=d" (__port) \
- : "0" (__value), "1" (__port) \
- ); \
- }
-
-#define outport_long( _port, _value ) \
- { register unsigned16 __port = _port; \
- register unsigned32 __value = _value; \
- \
- asm volatile ( "outl %0,%1" : "=a" (__value), "=d" (__port) \
- : "0" (__value), "1" (__port) \
- ); \
- }
-
-#define inport_byte( _port, _value ) \
- { register unsigned16 __port = _port; \
- register unsigned8 __value = 0; \
- \
- asm volatile ( "inb %1,%0" : "=a" (__value), "=d" (__port) \
- : "0" (__value), "1" (__port) \
- ); \
- _value = __value; \
- }
-
-#define inport_word( _port, _value ) \
- { register unsigned16 __port = _port; \
- register unsigned16 __value = 0; \
- \
- asm volatile ( "inw %1,%0" : "=a" (__value), "=d" (__port) \
- : "0" (__value), "1" (__port) \
- ); \
- _value = __value; \
- }
-
-#define inport_long( _port, _value ) \
- { register unsigned16 __port = _port; \
- register unsigned32 __value = 0; \
- \
- asm volatile ( "inl %1,%0" : "=a" (__value), "=d" (__port) \
- : "0" (__value), "1" (__port) \
- ); \
- _value = __value; \
- }
-
-/* structures */
-
-/* See Chapter 5 - Memory Management in i386 manual */
-
-struct GDT_slot {
- unsigned16 limit_0_15;
- unsigned16 base_0_15;
- unsigned8 base_16_23;
- unsigned8 type_dt_dpl_p;
- unsigned8 limit_16_19_granularity;
- unsigned8 base_24_31;
-};
-
-/* See Chapter 9 - Exceptions and Interrupts in i386 manual
- *
- * NOTE: This is the IDT entry for interrupt gates ONLY.
- */
-
-struct IDT_slot {
- unsigned16 offset_0_15;
- unsigned16 segment_selector;
- unsigned8 reserved;
- unsigned8 p_dpl;
- unsigned16 offset_16_31;
-};
-
-struct DTR_load_save_format {
- unsigned16 limit;
- unsigned32 physical_address;
-};
-
-/* variables */
-
-extern struct IDT_slot Interrupt_descriptor_table[ 256 ];
-extern struct GDT_slot Global_descriptor_table[ 8192 ];
-
-/* functions */
-
-#ifdef CPU_INITIALIZE
-#define EXTERN
-#else
-#undef EXTERN
-#define EXTERN extern
-#endif
-
-void *Logical_to_physical(
- unsigned16 segment,
- void *address
-);
-
-void *Physical_to_logical(
- unsigned16 segment,
- void *address
-);
-
-/* complicated static inline functions */
-
-#define get_GDTR( _gdtr_address ) \
- { \
- void *_gdtr = (_gdtr_address); \
- \
- asm volatile( "sgdt (%0)" : "=r" (_gdtr) : "0" (_gdtr) ); \
- }
-
-#define get_GDT_slot( _gdtr_base, _segment, _slot_address ) \
- { \
- register unsigned32 _gdt_slot = (_gdtr_base) + (_segment); \
- register volatile void *_slot = (_slot_address); \
- register unsigned32 _temporary = 0; \
- \
- asm volatile( "movl %%gs:(%0),%1 ; \
- movl %1,(%2) ; \
- movl %%gs:4(%0),%1 ; \
- movl %1,4(%2)" \
- : "=r" (_gdt_slot), "=r" (_temporary), "=r" (_slot) \
- : "0" (_gdt_slot), "1" (_temporary), "2" (_slot) \
- ); \
- }
-
-#define set_GDT_slot( _gdtr_base, _segment, _slot_address ) \
- { \
- register unsigned32 _gdt_slot = (_gdtr_base) + (_segment); \
- register volatile void *_slot = (_slot_address); \
- register unsigned32 _temporary = 0; \
- \
- asm volatile( "movl (%2),%1 ; \
- movl %1,%%gs:(%0) ; \
- movl 4(%2),%1 ; \
- movl %1,%%gs:4(%0) \
- " \
- : "=r" (_gdt_slot), "=r" (_temporary), "=r" (_slot) \
- : "0" (_gdt_slot), "1" (_temporary), "2" (_slot) \
- ); \
- }
-
-static inline void set_segment(
- unsigned16 segment,
- unsigned32 base,
- unsigned32 limit
-)
-{
- struct DTR_load_save_format gdtr;
- volatile struct GDT_slot Gdt_slot;
- volatile struct GDT_slot *gdt_slot = &Gdt_slot;
- unsigned16 tmp_segment = 0;
- unsigned32 limit_adjusted;
-
-
- /* load physical address of the GDT */
-
- get_GDTR( &gdtr );
-
- gdt_slot->type_dt_dpl_p = 0x92; /* present, dpl=0, */
- /* application=1, */
- /* type=data read/write */
- gdt_slot->limit_16_19_granularity = 0x40; /* 32 bit segment */
-
- limit_adjusted = limit;
- if ( limit > 4095 ) {
- gdt_slot->limit_16_19_granularity |= 0x80; /* set granularity bit */
- limit_adjusted /= 4096;
- }
-
- gdt_slot->limit_16_19_granularity |= (limit_adjusted >> 16) & 0xff;
- gdt_slot->limit_0_15 = limit_adjusted & 0xffff;
-
- gdt_slot->base_0_15 = base & 0xffff;
- gdt_slot->base_16_23 = (base >> 16) & 0xff;
- gdt_slot->base_24_31 = (base >> 24);
-
- set_GDT_slot( gdtr.physical_address, segment, gdt_slot );
-
- /* Now, reload all segment registers so the limit takes effect. */
-
- asm volatile( "movw %%ds,%0 ; movw %0,%%ds\n"
- "movw %%es,%0 ; movw %0,%%es\n"
- "movw %%fs,%0 ; movw %0,%%fs\n"
- "movw %%gs,%0 ; movw %0,%%gs\n"
- "movw %%ss,%0 ; movw %0,%%ss"
- : "=r" (tmp_segment)
- : "0" (tmp_segment)
- );
-
-}
-
-#endif
-/* end of include file */
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-26 01:25:21 +0000