diff options
Diffstat (limited to 'sysdeps/standalone/i386/i386.h')
| -rw-r--r-- | sysdeps/standalone/i386/i386.h | 167 |
1 files changed, 83 insertions, 84 deletions
diff --git a/sysdeps/standalone/i386/i386.h b/sysdeps/standalone/i386/i386.h index 8302773709..20d7f01fe3 100644 --- a/sysdeps/standalone/i386/i386.h +++ b/sysdeps/standalone/i386/i386.h @@ -1,29 +1,28 @@ -/* Copyright (C) 1994 Free Software Foundation, Inc. +/* 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 Library General Public License as -published by the Free Software Foundation; either version 2 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 -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. 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 + * 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 + * functions which are useful to those developing target * specific support routines. */ @@ -37,16 +36,16 @@ typedef unsigned int unsigned32; #define disable_intr( isrlevel ) \ { (isrlevel) = 0; \ asm volatile ( "pushf ; \ - pop %0 ; \ - cli " \ - : "=r" ((isrlevel)) : "0" ((isrlevel)) ); \ + pop %0 ; \ + cli " \ + : "=r" ((isrlevel)) : "0" ((isrlevel)) ); \ } #define enable_intr( isrlevel ) \ { asm volatile ( "push %0 ; \ - popf " \ - : "=r" ((isrlevel)) : "0" ((isrlevel)) ); \ + popf " \ + : "=r" ((isrlevel)) : "0" ((isrlevel)) ); \ } #define delay( _microseconds ) \ @@ -56,10 +55,10 @@ typedef unsigned int unsigned32; _counter = (_microseconds); \ \ asm volatile ( "0: nop;" \ - " mov %0,%0 ;" \ - " loop 0" : "=c" (_counter) \ - : "0" (_counter) \ - ); \ + " mov %0,%0 ;" \ + " loop 0" : "=c" (_counter) \ + : "0" (_counter) \ + ); \ \ } @@ -69,7 +68,7 @@ static inline unsigned16 get_cs() { register unsigned16 segment = 0; - asm volatile ( "movw %%cs,%0" : "=r" (segment) : "0" (segment) ); + asm volatile ( "movw %%cs,%0" : "=r" (segment) : "0" (segment) ); return segment; } @@ -78,7 +77,7 @@ static inline unsigned16 get_ds() { register unsigned16 segment = 0; - asm volatile ( "movw %%ds,%0" : "=r" (segment) : "0" (segment) ); + asm volatile ( "movw %%ds,%0" : "=r" (segment) : "0" (segment) ); return segment; } @@ -87,7 +86,7 @@ static inline unsigned16 get_es() { register unsigned16 segment = 0; - asm volatile ( "movw %%es,%0" : "=r" (segment) : "0" (segment) ); + asm volatile ( "movw %%es,%0" : "=r" (segment) : "0" (segment) ); return segment; } @@ -96,7 +95,7 @@ static inline unsigned16 get_ss() { register unsigned16 segment = 0; - asm volatile ( "movw %%ss,%0" : "=r" (segment) : "0" (segment) ); + asm volatile ( "movw %%ss,%0" : "=r" (segment) : "0" (segment) ); return segment; } @@ -105,7 +104,7 @@ static inline unsigned16 get_fs() { register unsigned16 segment = 0; - asm volatile ( "movw %%fs,%0" : "=r" (segment) : "0" (segment) ); + asm volatile ( "movw %%fs,%0" : "=r" (segment) : "0" (segment) ); return segment; } @@ -114,7 +113,7 @@ static inline unsigned16 get_gs() { register unsigned16 segment = 0; - asm volatile ( "movw %%gs,%0" : "=r" (segment) : "0" (segment) ); + asm volatile ( "movw %%gs,%0" : "=r" (segment) : "0" (segment) ); return segment; } @@ -126,8 +125,8 @@ static inline unsigned16 get_gs() register unsigned8 __value = _value; \ \ asm volatile ( "outb %0,%1" : "=a" (__value), "=d" (__port) \ - : "0" (__value), "1" (__port) \ - ); \ + : "0" (__value), "1" (__port) \ + ); \ } #define outport_word( _port, _value ) \ @@ -135,8 +134,8 @@ static inline unsigned16 get_gs() register unsigned16 __value = _value; \ \ asm volatile ( "outw %0,%1" : "=a" (__value), "=d" (__port) \ - : "0" (__value), "1" (__port) \ - ); \ + : "0" (__value), "1" (__port) \ + ); \ } #define outport_long( _port, _value ) \ @@ -144,8 +143,8 @@ static inline unsigned16 get_gs() register unsigned32 __value = _value; \ \ asm volatile ( "outl %0,%1" : "=a" (__value), "=d" (__port) \ - : "0" (__value), "1" (__port) \ - ); \ + : "0" (__value), "1" (__port) \ + ); \ } #define inport_byte( _port, _value ) \ @@ -153,8 +152,8 @@ static inline unsigned16 get_gs() register unsigned8 __value = 0; \ \ asm volatile ( "inb %1,%0" : "=a" (__value), "=d" (__port) \ - : "0" (__value), "1" (__port) \ - ); \ + : "0" (__value), "1" (__port) \ + ); \ _value = __value; \ } @@ -163,8 +162,8 @@ static inline unsigned16 get_gs() register unsigned16 __value = 0; \ \ asm volatile ( "inw %1,%0" : "=a" (__value), "=d" (__port) \ - : "0" (__value), "1" (__port) \ - ); \ + : "0" (__value), "1" (__port) \ + ); \ _value = __value; \ } @@ -173,8 +172,8 @@ static inline unsigned16 get_gs() register unsigned32 __value = 0; \ \ asm volatile ( "inl %1,%0" : "=a" (__value), "=d" (__port) \ - : "0" (__value), "1" (__port) \ - ); \ + : "0" (__value), "1" (__port) \ + ); \ _value = __value; \ } @@ -191,7 +190,7 @@ struct GDT_slot { unsigned8 base_24_31; }; -/* See Chapter 9 - Exceptions and Interrupts in i386 manual +/* See Chapter 9 - Exceptions and Interrupts in i386 manual * * NOTE: This is the IDT entry for interrupt gates ONLY. */ @@ -249,12 +248,12 @@ void *Physical_to_logical( 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) \ - ); \ + 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 ) \ @@ -264,63 +263,63 @@ void *Physical_to_logical( 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) \ - ); \ + 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, +static inline void set_segment( + unsigned16 segment, unsigned32 base, - unsigned32 limit -) -{ - struct DTR_load_save_format gdtr; + 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 */ + /* 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 - movw %%es,%0 ; movw %0,%%es - movw %%fs,%0 ; movw %0,%%fs - movw %%gs,%0 ; movw %0,%%gs - movw %%ss,%0 ; movw %0,%%ss" - : "=r" (tmp_segment) - : "0" (tmp_segment) - ); - + movw %%es,%0 ; movw %0,%%es + movw %%fs,%0 ; movw %0,%%fs + movw %%gs,%0 ; movw %0,%%gs + movw %%ss,%0 ; movw %0,%%ss" + : "=r" (tmp_segment) + : "0" (tmp_segment) + ); + } #endif |