forked from Imagelibrary/rtems
Joel Sherrill
committed by
Gedare Bloom
Gedare Bloom
parent
dda25b19df
commit
328bd350aa
@@ -57,7 +57,7 @@
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#include <rtems/iosupp.h>
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#include <rtems/console.h>
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#include <rtems/clockdrv.h>
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#include <libcpu/cpu.h>
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#include <rtems/score/cpu.h>
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#include <rtems/bspIo.h>
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#ifdef __cplusplus
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@@ -16,7 +16,7 @@
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <libcpu/cpu.h>
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#include <rtems/score/cpu.h>
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#include <bsp/irq.h>
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static rtems_raw_irq_connect_data* raw_irq_table;
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@@ -16,7 +16,7 @@
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#include <rtems/bspIo.h>
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#include <libcpu/cpu.h>
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#include <rtems/score/cpu.h>
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#include <bsp.h>
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#include <bsp/irq.h>
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@@ -23,7 +23,7 @@
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#ifndef _REALMODE_INT_H
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#define _REALMODE_INT_H
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#include <libcpu/cpu.h>
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#include <rtems/score/cpu.h>
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#include <stdint.h>
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#ifndef ASM /* ASM */
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@@ -79,7 +79,7 @@
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#include <unistd.h>
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#include <rtems.h>
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#include <rtems/bspIo.h>
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#include <libcpu/cpu.h>
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#include <rtems/score/cpu.h>
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#include <assert.h>
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extern void _pc386_delay(void);
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@@ -6,7 +6,7 @@ include $(top_srcdir)/../../../automake/compile.am
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include_libcpudir = $(includedir)/libcpu
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include_libcpu_HEADERS = cpu.h cpuModel.h
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include_libcpu_HEADERS = page.h cpuModel.h
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include_libcpu_HEADERS += ../shared/include/cache.h
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include_libcpu_HEADERS += byteorder.h
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@@ -22,7 +22,7 @@ score_rel_CPPFLAGS = $(AM_CPPFLAGS)
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score_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
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noinst_PROGRAMS += page.rel
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page_rel_SOURCES = page.c cpu.h
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page_rel_SOURCES = page.c page.h
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page_rel_CPPFLAGS = $(AM_CPPFLAGS)
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page_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
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@@ -3,9 +3,9 @@
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*/
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#include <rtems.h>
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#include <rtems/score/registers.h>
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#include "cache_.h"
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#include <libcpu/cpu.h>
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#include <rtems/score/cpu.h>
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#include <libcpu/page.h>
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void _CPU_disable_cache(void)
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{
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@@ -1,475 +0,0 @@
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/*
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* @file cpu.h
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*
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* This file contains definitions for data structure related
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* to Intel system programming. More information can be found
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* on Intel site and more precisely in the following book :
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*
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* Pentium Processor familly
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* Developper's Manual
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*
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* Volume 3 : Architecture and Programming Manual
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*
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* Copyright (C) 1998 Eric Valette (valette@crf.canon.fr)
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* Canon Centre Recherche France.
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifndef _LIBCPU_i386_CPU_H
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#define _LIBCPU_i386_CPU_H
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#include <rtems/score/registers.h>
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#ifndef ASM
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/*
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* Interrupt Level Macros
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*/
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#include <rtems/score/interrupts.h>
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#include <rtems/score/basedefs.h>
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/*
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* Segment Access Routines
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*
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* NOTE: Unfortunately, these are still static inlines even when the
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* "macro" implementation of the generic code is used.
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*/
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static __inline__ unsigned short i386_get_cs(void)
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{
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register unsigned short segment = 0;
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__asm__ volatile ( "movw %%cs,%0" : "=r" (segment) : "0" (segment) );
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return segment;
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}
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static __inline__ unsigned short i386_get_ds(void)
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{
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register unsigned short segment = 0;
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__asm__ volatile ( "movw %%ds,%0" : "=r" (segment) : "0" (segment) );
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return segment;
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}
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static __inline__ unsigned short i386_get_es(void)
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{
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register unsigned short segment = 0;
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__asm__ volatile ( "movw %%es,%0" : "=r" (segment) : "0" (segment) );
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return segment;
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}
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static __inline__ unsigned short i386_get_ss(void)
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{
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register unsigned short segment = 0;
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__asm__ volatile ( "movw %%ss,%0" : "=r" (segment) : "0" (segment) );
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return segment;
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}
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static __inline__ unsigned short i386_get_fs(void)
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{
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register unsigned short segment = 0;
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__asm__ volatile ( "movw %%fs,%0" : "=r" (segment) : "0" (segment) );
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return segment;
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}
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static __inline__ unsigned short i386_get_gs(void)
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{
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register unsigned short segment = 0;
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__asm__ volatile ( "movw %%gs,%0" : "=r" (segment) : "0" (segment) );
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return segment;
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}
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/*
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* IO Port Access Routines
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*/
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#define i386_outport_byte( _port, _value ) \
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do { register unsigned short __port = _port; \
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register unsigned char __value = _value; \
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\
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__asm__ volatile ( "outb %0,%1" : : "a" (__value), "d" (__port) ); \
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} while (0)
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#define i386_outport_word( _port, _value ) \
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do { register unsigned short __port = _port; \
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register unsigned short __value = _value; \
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\
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__asm__ volatile ( "outw %0,%1" : : "a" (__value), "d" (__port) ); \
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} while (0)
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#define i386_outport_long( _port, _value ) \
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do { register unsigned short __port = _port; \
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register unsigned int __value = _value; \
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\
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__asm__ volatile ( "outl %0,%1" : : "a" (__value), "d" (__port) ); \
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} while (0)
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#define i386_inport_byte( _port, _value ) \
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do { register unsigned short __port = _port; \
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register unsigned char __value = 0; \
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\
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__asm__ volatile ( "inb %1,%0" : "=a" (__value) \
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: "d" (__port) \
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); \
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_value = __value; \
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} while (0)
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#define i386_inport_word( _port, _value ) \
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do { register unsigned short __port = _port; \
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register unsigned short __value = 0; \
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\
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__asm__ volatile ( "inw %1,%0" : "=a" (__value) \
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: "d" (__port) \
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); \
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_value = __value; \
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} while (0)
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#define i386_inport_long( _port, _value ) \
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do { register unsigned short __port = _port; \
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register unsigned int __value = 0; \
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\
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__asm__ volatile ( "inl %1,%0" : "=a" (__value) \
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: "d" (__port) \
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); \
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_value = __value; \
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} while (0)
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/*
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* Type definition for raw interrupts.
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*/
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typedef unsigned char rtems_vector_offset;
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typedef struct __rtems_raw_irq_connect_data__{
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/*
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* IDT vector offset (IRQ line + PC386_IRQ_VECTOR_BASE)
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*/
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rtems_vector_offset idtIndex;
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/*
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* IDT raw handler. See comment on handler properties below in function prototype.
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*/
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rtems_raw_irq_hdl hdl;
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/*
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* function for enabling raw interrupts. In order to be consistent
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* with the fact that the raw connexion can defined in the
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* libcpu library, this library should have no knowledge of
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* board specific hardware to manage interrupts and thus the
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* "on" routine must enable the irq both at device and PIC level.
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*
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*/
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rtems_raw_irq_enable on;
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/*
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* function for disabling raw interrupts. In order to be consistent
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* with the fact that the raw connexion can defined in the
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* libcpu library, this library should have no knowledge of
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* board specific hardware to manage interrupts and thus the
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* "on" routine must disable the irq both at device and PIC level.
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*
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*/
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rtems_raw_irq_disable off;
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/*
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* function enabling to know what interrupt may currently occur
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*/
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rtems_raw_irq_is_enabled isOn;
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}rtems_raw_irq_connect_data;
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typedef struct {
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/*
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* size of all the table fields (*Tbl) described below.
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*/
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unsigned int idtSize;
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/*
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* Default handler used when disconnecting interrupts.
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*/
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rtems_raw_irq_connect_data defaultRawEntry;
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/*
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* Table containing initials/current value.
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*/
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rtems_raw_irq_connect_data* rawIrqHdlTbl;
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}rtems_raw_irq_global_settings;
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#include <rtems/score/idtr.h>
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/*
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* C callable function enabling to get handler currently connected to a vector
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*
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*/
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rtems_raw_irq_hdl get_hdl_from_vector(rtems_vector_offset);
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/*
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* C callable function enabling to set up one raw idt entry
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*/
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extern int i386_set_idt_entry (const rtems_raw_irq_connect_data*);
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/*
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* C callable function enabling to get one current raw idt entry
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*/
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extern int i386_get_current_idt_entry (rtems_raw_irq_connect_data*);
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/*
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* C callable function enabling to remove one current raw idt entry
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*/
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extern int i386_delete_idt_entry (const rtems_raw_irq_connect_data*);
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/*
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* C callable function enabling to init idt.
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*
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* CAUTION : this function assumes that the IDTR register
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* has been already set.
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*/
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extern int i386_init_idt (rtems_raw_irq_global_settings* config);
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/*
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* C callable function enabling to get actual idt configuration
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*/
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extern int i386_get_idt_config (rtems_raw_irq_global_settings** config);
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/*
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* See page 11.12 Figure 11-8.
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*
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*/
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/**
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* @brief describes one entry of Global/Local Descriptor Table
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*/
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typedef struct {
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unsigned int limit_15_0 : 16;
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unsigned int base_address_15_0 : 16;
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unsigned int base_address_23_16 : 8;
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unsigned int type : 4;
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unsigned int descriptor_type : 1;
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unsigned int privilege : 2;
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unsigned int present : 1;
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unsigned int limit_19_16 : 4;
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unsigned int available : 1;
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unsigned int fixed_value_bits : 1;
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unsigned int operation_size : 1;
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unsigned int granularity : 1;
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unsigned int base_address_31_24 : 8;
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} RTEMS_PACKED segment_descriptors;
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/*
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* C callable function enabling to get easilly usable info from
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* the actual value of GDT register.
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*/
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extern void i386_get_info_from_GDTR (segment_descriptors** table,
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uint16_t* limit);
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/*
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* C callable function enabling to change the value of GDT register. Must be called
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* with interrupts masked at processor level!!!.
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*/
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extern void i386_set_GDTR (segment_descriptors*,
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uint16_t limit);
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/**
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* @brief Allows to set a GDT entry.
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*
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* Puts global descriptor \p sd to the global descriptor table on index
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* \p segment_selector_index
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*
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* @param[in] segment_selector_index index to GDT entry
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* @param[in] sd structure to be coppied to given \p segment_selector in GDT
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* @retval 0 FAILED out of GDT range or index is 0, which is not valid
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* index in GDT
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* @retval 1 SUCCESS
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*/
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extern uint32_t i386_raw_gdt_entry (uint16_t segment_selector_index,
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segment_descriptors* sd);
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/**
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* @brief fills \p sd with provided \p base in appropriate fields of \p sd
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*
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* @param[in] base 32-bit address to be set as descriptor's base
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* @param[out] sd descriptor being filled with \p base
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*/
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extern void i386_fill_segment_desc_base (uint32_t base,
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segment_descriptors* sd);
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/**
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* @brief fills \p sd with provided \p limit in appropriate fields of \p sd
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*
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* sets granularity bit if necessary
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*
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* @param[in] limit 32-bit value representing number of limit bytes
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* @param[out] sd descriptor being filled with \p limit
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*/
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extern void i386_fill_segment_desc_limit (uint32_t limit,
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segment_descriptors* sd);
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/*
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* C callable function enabling to set up one raw interrupt handler
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*/
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extern uint32_t i386_set_gdt_entry (uint16_t segment_selector,
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uint32_t base,
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uint32_t limit);
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/**
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* @brief Returns next empty descriptor in GDT.
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*
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* Number of descriptors that can be returned depends on \a GDT_SIZE
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*
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* @retval 0 FAILED GDT is full
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* @retval <1;65535> segment_selector number as index to GDT
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*/
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extern uint16_t i386_next_empty_gdt_entry (void);
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/**
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* @brief Copies GDT entry at index \p segment_selector to structure
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* pointed to by \p struct_to_fill
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*
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* @param[in] segment_selector index to GDT table specifying descriptor to copy
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* @param[out] struct_to_fill pointer to memory where will be descriptor coppied
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* @retval 0 FAILED segment_selector out of GDT range
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* @retval <1;65535> retrieved segment_selector
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*/
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extern uint16_t i386_cpy_gdt_entry (uint16_t segment_selector,
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segment_descriptors* struct_to_fill);
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/**
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* @brief Returns pointer to GDT table at index given by \p segment_selector
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*
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* @param[in] sgmnt_selector index to GDT table for specifying descriptor to get
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* @retval NULL FAILED segment_selector out of GDT range
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* @retval pointer to GDT table at \p segment_selector
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*/
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extern segment_descriptors* i386_get_gdt_entry (uint16_t sgmnt_selector);
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/**
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* @brief Extracts base address from GDT entry pointed to by \p gdt_entry
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*
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* @param[in] gdt_entry pointer to entry from which base should be retrieved
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* @retval base address from GDT entry
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*/
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RTEMS_INLINE_ROUTINE void* i386_base_gdt_entry (segment_descriptors* gdt_entry)
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{
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return (void*)(gdt_entry->base_address_15_0 |
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(gdt_entry->base_address_23_16<<16) |
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(gdt_entry->base_address_31_24<<24));
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}
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/**
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* @brief Extracts limit in bytes from GDT entry pointed to by \p gdt_entry
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*
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* @param[in] gdt_entry pointer to entry from which limit should be retrieved
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* @retval limit value in bytes from GDT entry
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*/
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extern uint32_t i386_limit_gdt_entry (segment_descriptors* gdt_entry);
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/*
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* See page 11.18 Figure 11-12.
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*
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*/
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typedef struct {
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unsigned int offset : 12;
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unsigned int page : 10;
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unsigned int directory : 10;
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}la_bits;
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typedef union {
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la_bits bits;
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unsigned int address;
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}linear_address;
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/*
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* See page 11.20 Figure 11-14.
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*
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*/
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typedef struct {
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unsigned int present : 1;
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unsigned int writable : 1;
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unsigned int user : 1;
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unsigned int write_through : 1;
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unsigned int cache_disable : 1;
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unsigned int accessed : 1;
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unsigned int reserved1 : 1;
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unsigned int page_size : 1;
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unsigned int reserved2 : 1;
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unsigned int available : 3;
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unsigned int page_frame_address : 20;
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}page_dir_bits;
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typedef union {
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page_dir_bits bits;
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unsigned int dir_entry;
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}page_dir_entry;
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typedef struct {
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unsigned int present : 1;
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unsigned int writable : 1;
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unsigned int user : 1;
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unsigned int write_through : 1;
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unsigned int cache_disable : 1;
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unsigned int accessed : 1;
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unsigned int dirty : 1;
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unsigned int reserved2 : 2;
|
||||
unsigned int available : 3;
|
||||
unsigned int page_frame_address : 20;
|
||||
}page_table_bits;
|
||||
|
||||
typedef union {
|
||||
page_table_bits bits;
|
||||
unsigned int table_entry;
|
||||
} page_table_entry;
|
||||
|
||||
/*
|
||||
* definitions related to page table entry
|
||||
*/
|
||||
#define PG_SIZE 0x1000
|
||||
#define MASK_OFFSET 0xFFF
|
||||
#define MAX_ENTRY (PG_SIZE/sizeof(page_dir_entry))
|
||||
#define FOUR_MB 0x400000
|
||||
#define MASK_FLAGS 0x1A
|
||||
|
||||
#define PTE_PRESENT 0x01
|
||||
#define PTE_WRITABLE 0x02
|
||||
#define PTE_USER 0x04
|
||||
#define PTE_WRITE_THROUGH 0x08
|
||||
#define PTE_CACHE_DISABLE 0x10
|
||||
|
||||
typedef struct {
|
||||
page_dir_entry pageDirEntry[MAX_ENTRY];
|
||||
} page_directory;
|
||||
|
||||
typedef struct {
|
||||
page_table_entry pageTableEntry[MAX_ENTRY];
|
||||
} page_table;
|
||||
|
||||
|
||||
/* C declaration for paging management */
|
||||
|
||||
extern int _CPU_is_cache_enabled(void);
|
||||
extern int _CPU_is_paging_enabled(void);
|
||||
extern int init_paging(void);
|
||||
extern void _CPU_enable_paging(void);
|
||||
extern void _CPU_disable_paging(void);
|
||||
extern void _CPU_disable_cache(void);
|
||||
extern void _CPU_enable_cache(void);
|
||||
extern int _CPU_map_phys_address
|
||||
(void **mappedAddress, void *physAddress,
|
||||
int size, int flag);
|
||||
extern int _CPU_unmap_virt_address (void *mappedAddress, int size);
|
||||
extern int _CPU_change_memory_mapping_attribute
|
||||
(void **newAddress, void *mappedAddress,
|
||||
unsigned int size, unsigned int flag);
|
||||
extern int _CPU_display_memory_attribute(void);
|
||||
|
||||
# endif /* ASM */
|
||||
|
||||
#endif
|
||||
@@ -20,7 +20,7 @@
|
||||
* Tell us the machine setup..
|
||||
*/
|
||||
#include <stdio.h>
|
||||
#include <libcpu/cpu.h>
|
||||
#include <rtems/score/cpu.h>
|
||||
#include <string.h>
|
||||
#include <libcpu/cpuModel.h>
|
||||
#include <rtems/bspIo.h>
|
||||
|
||||
@@ -21,7 +21,8 @@
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <rtems.h>
|
||||
#include <libcpu/cpu.h>
|
||||
#include <rtems/score/cpu.h>
|
||||
#include <libcpu/page.h>
|
||||
|
||||
#define MEMORY_SIZE 0x4000000 /* 64Mo */
|
||||
|
||||
|
||||
39
c/src/lib/libcpu/i386/page.h
Normal file
39
c/src/lib/libcpu/i386/page.h
Normal file
@@ -0,0 +1,39 @@
|
||||
/*
|
||||
* @file page.h
|
||||
*
|
||||
* Copyright (C) 1998 Eric Valette (valette@crf.canon.fr)
|
||||
* Canon Centre Recherche France.
|
||||
*
|
||||
* The license and distribution terms for this file may be
|
||||
* found in the file LICENSE in this distribution or at
|
||||
* http://www.rtems.org/license/LICENSE.
|
||||
*/
|
||||
|
||||
#ifndef _LIBCPU_i386_PAGE_H
|
||||
#define _LIBCPU_i386_PAGE_H
|
||||
|
||||
#ifndef ASM
|
||||
|
||||
#include <rtems/score/cpu.h>
|
||||
|
||||
/* C declaration for paging management */
|
||||
|
||||
extern int _CPU_is_cache_enabled(void);
|
||||
extern int _CPU_is_paging_enabled(void);
|
||||
extern int init_paging(void);
|
||||
extern void _CPU_enable_paging(void);
|
||||
extern void _CPU_disable_paging(void);
|
||||
extern void _CPU_disable_cache(void);
|
||||
extern void _CPU_enable_cache(void);
|
||||
extern int _CPU_map_phys_address
|
||||
(void **mappedAddress, void *physAddress,
|
||||
int size, int flag);
|
||||
extern int _CPU_unmap_virt_address (void *mappedAddress, int size);
|
||||
extern int _CPU_change_memory_mapping_attribute
|
||||
(void **newAddress, void *mappedAddress,
|
||||
unsigned int size, unsigned int flag);
|
||||
extern int _CPU_display_memory_attribute(void);
|
||||
|
||||
# endif /* ASM */
|
||||
|
||||
#endif
|
||||
@@ -18,9 +18,9 @@ $(PROJECT_INCLUDE)/libcpu/$(dirstamp):
|
||||
@: > $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
|
||||
PREINSTALL_DIRS += $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
|
||||
|
||||
$(PROJECT_INCLUDE)/libcpu/cpu.h: cpu.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
|
||||
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/cpu.h
|
||||
PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/cpu.h
|
||||
$(PROJECT_INCLUDE)/libcpu/page.h: page.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
|
||||
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/page.h
|
||||
PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/page.h
|
||||
|
||||
$(PROJECT_INCLUDE)/libcpu/cpuModel.h: cpuModel.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
|
||||
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/cpuModel.h
|
||||
|
||||
@@ -30,11 +30,6 @@ extern "C" {
|
||||
#include <rtems/score/types.h>
|
||||
#include <rtems/score/i386.h>
|
||||
|
||||
#ifndef ASM
|
||||
#include <rtems/score/interrupts.h> /* formerly in libcpu/cpu.h> */
|
||||
#include <rtems/score/registers.h> /* formerly part of libcpu */
|
||||
#endif
|
||||
|
||||
/* conditional compilation parameters */
|
||||
|
||||
#define CPU_INLINE_ENABLE_DISPATCH TRUE
|
||||
|
||||
@@ -8,9 +8,12 @@
|
||||
*/
|
||||
|
||||
/*
|
||||
* COPYRIGHT (c) 1989-2013.
|
||||
* COPYRIGHT (c) 1989-2016.
|
||||
* On-Line Applications Research Corporation (OAR).
|
||||
*
|
||||
* Copyright (C) 1998 Eric Valette (valette@crf.canon.fr)
|
||||
* Canon Centre Recherche France.
|
||||
*
|
||||
* The license and distribution terms for this file may be
|
||||
* found in the file LICENSE in this distribution or at
|
||||
* http://www.rtems.org/license/LICENSE.
|
||||
@@ -23,6 +26,9 @@
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#include <rtems/score/interrupts.h>
|
||||
#include <rtems/score/registers.h>
|
||||
|
||||
/*
|
||||
* This section contains the information required to build
|
||||
* RTEMS for a particular member of the Intel i386
|
||||
@@ -112,6 +118,7 @@ static inline uint32_t i386_swap_u32(
|
||||
#endif
|
||||
return( lout );
|
||||
}
|
||||
#define CPU_swap_u32( _value ) i386_swap_u32( _value )
|
||||
|
||||
static inline uint16_t i386_swap_u16(
|
||||
uint16_t value
|
||||
@@ -122,6 +129,7 @@ static inline uint16_t i386_swap_u16(
|
||||
__asm__ volatile( "rorw $8,%0" : "=r" (sout) : "0" (value));
|
||||
return (sout);
|
||||
}
|
||||
#define CPU_swap_u16( _value ) i386_swap_u16( _value )
|
||||
|
||||
/*
|
||||
* Added for pagination management
|
||||
@@ -202,7 +210,7 @@ RTEMS_INLINE_ROUTINE void *i386_Real_to_physical(
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Retreives real mode pointer elements {segmnet, offset} from
|
||||
* @brief Retrieves real mode pointer elements {segmnet, offset} from
|
||||
* physical address.
|
||||
*
|
||||
* i386_Physical_to_real
|
||||
@@ -227,23 +235,425 @@ int i386_Physical_to_real(
|
||||
);
|
||||
|
||||
/*
|
||||
* "Simpler" names for a lot of the things defined in this file
|
||||
* Segment Access Routines
|
||||
*
|
||||
* NOTE: Unfortunately, these are still static inlines even when the
|
||||
* "macro" implementation of the generic code is used.
|
||||
*/
|
||||
|
||||
/* segment access routines */
|
||||
static __inline__ unsigned short i386_get_cs(void)
|
||||
{
|
||||
register unsigned short segment = 0;
|
||||
|
||||
#define get_cs() i386_get_cs()
|
||||
#define get_ds() i386_get_ds()
|
||||
#define get_es() i386_get_es()
|
||||
#define get_ss() i386_get_ss()
|
||||
#define get_fs() i386_get_fs()
|
||||
#define get_gs() i386_get_gs()
|
||||
__asm__ volatile ( "movw %%cs,%0" : "=r" (segment) : "0" (segment) );
|
||||
|
||||
#define CPU_swap_u32( _value ) i386_swap_u32( _value )
|
||||
#define CPU_swap_u16( _value ) i386_swap_u16( _value )
|
||||
return segment;
|
||||
}
|
||||
|
||||
/* i80x86 I/O instructions */
|
||||
static __inline__ unsigned short i386_get_ds(void)
|
||||
{
|
||||
register unsigned short segment = 0;
|
||||
|
||||
__asm__ volatile ( "movw %%ds,%0" : "=r" (segment) : "0" (segment) );
|
||||
|
||||
return segment;
|
||||
}
|
||||
|
||||
static __inline__ unsigned short i386_get_es(void)
|
||||
{
|
||||
register unsigned short segment = 0;
|
||||
|
||||
__asm__ volatile ( "movw %%es,%0" : "=r" (segment) : "0" (segment) );
|
||||
|
||||
return segment;
|
||||
}
|
||||
|
||||
static __inline__ unsigned short i386_get_ss(void)
|
||||
{
|
||||
register unsigned short segment = 0;
|
||||
|
||||
__asm__ volatile ( "movw %%ss,%0" : "=r" (segment) : "0" (segment) );
|
||||
|
||||
return segment;
|
||||
}
|
||||
|
||||
static __inline__ unsigned short i386_get_fs(void)
|
||||
{
|
||||
register unsigned short segment = 0;
|
||||
|
||||
__asm__ volatile ( "movw %%fs,%0" : "=r" (segment) : "0" (segment) );
|
||||
|
||||
return segment;
|
||||
}
|
||||
|
||||
static __inline__ unsigned short i386_get_gs(void)
|
||||
{
|
||||
register unsigned short segment = 0;
|
||||
|
||||
__asm__ volatile ( "movw %%gs,%0" : "=r" (segment) : "0" (segment) );
|
||||
|
||||
return segment;
|
||||
}
|
||||
|
||||
/*
|
||||
* IO Port Access Routines
|
||||
*/
|
||||
|
||||
#define i386_outport_byte( _port, _value ) \
|
||||
do { register unsigned short __port = _port; \
|
||||
register unsigned char __value = _value; \
|
||||
\
|
||||
__asm__ volatile ( "outb %0,%1" : : "a" (__value), "d" (__port) ); \
|
||||
} while (0)
|
||||
|
||||
#define i386_outport_word( _port, _value ) \
|
||||
do { register unsigned short __port = _port; \
|
||||
register unsigned short __value = _value; \
|
||||
\
|
||||
__asm__ volatile ( "outw %0,%1" : : "a" (__value), "d" (__port) ); \
|
||||
} while (0)
|
||||
|
||||
#define i386_outport_long( _port, _value ) \
|
||||
do { register unsigned short __port = _port; \
|
||||
register unsigned int __value = _value; \
|
||||
\
|
||||
__asm__ volatile ( "outl %0,%1" : : "a" (__value), "d" (__port) ); \
|
||||
} while (0)
|
||||
|
||||
#define i386_inport_byte( _port, _value ) \
|
||||
do { register unsigned short __port = _port; \
|
||||
register unsigned char __value = 0; \
|
||||
\
|
||||
__asm__ volatile ( "inb %1,%0" : "=a" (__value) \
|
||||
: "d" (__port) \
|
||||
); \
|
||||
_value = __value; \
|
||||
} while (0)
|
||||
|
||||
#define i386_inport_word( _port, _value ) \
|
||||
do { register unsigned short __port = _port; \
|
||||
register unsigned short __value = 0; \
|
||||
\
|
||||
__asm__ volatile ( "inw %1,%0" : "=a" (__value) \
|
||||
: "d" (__port) \
|
||||
); \
|
||||
_value = __value; \
|
||||
} while (0)
|
||||
|
||||
#define i386_inport_long( _port, _value ) \
|
||||
do { register unsigned short __port = _port; \
|
||||
register unsigned int __value = 0; \
|
||||
\
|
||||
__asm__ volatile ( "inl %1,%0" : "=a" (__value) \
|
||||
: "d" (__port) \
|
||||
); \
|
||||
_value = __value; \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* Type definition for raw interrupts.
|
||||
*/
|
||||
|
||||
typedef unsigned char rtems_vector_offset;
|
||||
|
||||
typedef struct __rtems_raw_irq_connect_data__{
|
||||
/*
|
||||
* IDT vector offset (IRQ line + PC386_IRQ_VECTOR_BASE)
|
||||
*/
|
||||
rtems_vector_offset idtIndex;
|
||||
/*
|
||||
* IDT raw handler. See comment on handler properties below in function prototype.
|
||||
*/
|
||||
rtems_raw_irq_hdl hdl;
|
||||
/*
|
||||
* function for enabling raw interrupts. In order to be consistent
|
||||
* with the fact that the raw connexion can defined in the
|
||||
* libcpu library, this library should have no knowledge of
|
||||
* board specific hardware to manage interrupts and thus the
|
||||
* "on" routine must enable the irq both at device and PIC level.
|
||||
*
|
||||
*/
|
||||
rtems_raw_irq_enable on;
|
||||
/*
|
||||
* function for disabling raw interrupts. In order to be consistent
|
||||
* with the fact that the raw connexion can defined in the
|
||||
* libcpu library, this library should have no knowledge of
|
||||
* board specific hardware to manage interrupts and thus the
|
||||
* "on" routine must disable the irq both at device and PIC level.
|
||||
*
|
||||
*/
|
||||
rtems_raw_irq_disable off;
|
||||
/*
|
||||
* function enabling to know what interrupt may currently occur
|
||||
*/
|
||||
rtems_raw_irq_is_enabled isOn;
|
||||
}rtems_raw_irq_connect_data;
|
||||
|
||||
typedef struct {
|
||||
/*
|
||||
* size of all the table fields (*Tbl) described below.
|
||||
*/
|
||||
unsigned int idtSize;
|
||||
/*
|
||||
* Default handler used when disconnecting interrupts.
|
||||
*/
|
||||
rtems_raw_irq_connect_data defaultRawEntry;
|
||||
/*
|
||||
* Table containing initials/current value.
|
||||
*/
|
||||
rtems_raw_irq_connect_data* rawIrqHdlTbl;
|
||||
}rtems_raw_irq_global_settings;
|
||||
|
||||
#include <rtems/score/idtr.h>
|
||||
|
||||
/*
|
||||
* C callable function enabling to get handler currently connected to a vector
|
||||
*
|
||||
*/
|
||||
rtems_raw_irq_hdl get_hdl_from_vector(rtems_vector_offset);
|
||||
|
||||
/*
|
||||
* C callable function enabling to set up one raw idt entry
|
||||
*/
|
||||
extern int i386_set_idt_entry (const rtems_raw_irq_connect_data*);
|
||||
|
||||
/*
|
||||
* C callable function enabling to get one current raw idt entry
|
||||
*/
|
||||
extern int i386_get_current_idt_entry (rtems_raw_irq_connect_data*);
|
||||
|
||||
/*
|
||||
* C callable function enabling to remove one current raw idt entry
|
||||
*/
|
||||
extern int i386_delete_idt_entry (const rtems_raw_irq_connect_data*);
|
||||
|
||||
/*
|
||||
* C callable function enabling to init idt.
|
||||
*
|
||||
* CAUTION : this function assumes that the IDTR register
|
||||
* has been already set.
|
||||
*/
|
||||
extern int i386_init_idt (rtems_raw_irq_global_settings* config);
|
||||
|
||||
/*
|
||||
* C callable function enabling to get actual idt configuration
|
||||
*/
|
||||
extern int i386_get_idt_config (rtems_raw_irq_global_settings** config);
|
||||
|
||||
|
||||
/*
|
||||
* See page 11.12 Figure 11-8.
|
||||
*
|
||||
*/
|
||||
/**
|
||||
* @brief describes one entry of Global/Local Descriptor Table
|
||||
*/
|
||||
typedef struct {
|
||||
unsigned int limit_15_0 : 16;
|
||||
unsigned int base_address_15_0 : 16;
|
||||
unsigned int base_address_23_16 : 8;
|
||||
unsigned int type : 4;
|
||||
unsigned int descriptor_type : 1;
|
||||
unsigned int privilege : 2;
|
||||
unsigned int present : 1;
|
||||
unsigned int limit_19_16 : 4;
|
||||
unsigned int available : 1;
|
||||
unsigned int fixed_value_bits : 1;
|
||||
unsigned int operation_size : 1;
|
||||
unsigned int granularity : 1;
|
||||
unsigned int base_address_31_24 : 8;
|
||||
} RTEMS_PACKED segment_descriptors;
|
||||
|
||||
/*
|
||||
* C callable function enabling to get easilly usable info from
|
||||
* the actual value of GDT register.
|
||||
*/
|
||||
extern void i386_get_info_from_GDTR (segment_descriptors** table,
|
||||
uint16_t* limit);
|
||||
/*
|
||||
* C callable function enabling to change the value of GDT register. Must be called
|
||||
* with interrupts masked at processor level!!!.
|
||||
*/
|
||||
extern void i386_set_GDTR (segment_descriptors*,
|
||||
uint16_t limit);
|
||||
|
||||
/**
|
||||
* @brief Allows to set a GDT entry.
|
||||
*
|
||||
* Puts global descriptor \p sd to the global descriptor table on index
|
||||
* \p segment_selector_index
|
||||
*
|
||||
* @param[in] segment_selector_index index to GDT entry
|
||||
* @param[in] sd structure to be coppied to given \p segment_selector in GDT
|
||||
* @retval 0 FAILED out of GDT range or index is 0, which is not valid
|
||||
* index in GDT
|
||||
* @retval 1 SUCCESS
|
||||
*/
|
||||
extern uint32_t i386_raw_gdt_entry (uint16_t segment_selector_index,
|
||||
segment_descriptors* sd);
|
||||
|
||||
/**
|
||||
* @brief fills \p sd with provided \p base in appropriate fields of \p sd
|
||||
*
|
||||
* @param[in] base 32-bit address to be set as descriptor's base
|
||||
* @param[out] sd descriptor being filled with \p base
|
||||
*/
|
||||
extern void i386_fill_segment_desc_base (uint32_t base,
|
||||
segment_descriptors* sd);
|
||||
|
||||
/**
|
||||
* @brief fills \p sd with provided \p limit in appropriate fields of \p sd
|
||||
*
|
||||
* sets granularity bit if necessary
|
||||
*
|
||||
* @param[in] limit 32-bit value representing number of limit bytes
|
||||
* @param[out] sd descriptor being filled with \p limit
|
||||
*/
|
||||
extern void i386_fill_segment_desc_limit (uint32_t limit,
|
||||
segment_descriptors* sd);
|
||||
|
||||
/*
|
||||
* C callable function enabling to set up one raw interrupt handler
|
||||
*/
|
||||
extern uint32_t i386_set_gdt_entry (uint16_t segment_selector,
|
||||
uint32_t base,
|
||||
uint32_t limit);
|
||||
|
||||
/**
|
||||
* @brief Returns next empty descriptor in GDT.
|
||||
*
|
||||
* Number of descriptors that can be returned depends on \a GDT_SIZE
|
||||
*
|
||||
* @retval 0 FAILED GDT is full
|
||||
* @retval <1;65535> segment_selector number as index to GDT
|
||||
*/
|
||||
extern uint16_t i386_next_empty_gdt_entry (void);
|
||||
|
||||
/**
|
||||
* @brief Copies GDT entry at index \p segment_selector to structure
|
||||
* pointed to by \p struct_to_fill
|
||||
*
|
||||
* @param[in] segment_selector index to GDT table specifying descriptor to copy
|
||||
* @param[out] struct_to_fill pointer to memory where will be descriptor coppied
|
||||
* @retval 0 FAILED segment_selector out of GDT range
|
||||
* @retval <1;65535> retrieved segment_selector
|
||||
*/
|
||||
extern uint16_t i386_cpy_gdt_entry (uint16_t segment_selector,
|
||||
segment_descriptors* struct_to_fill);
|
||||
|
||||
/**
|
||||
* @brief Returns pointer to GDT table at index given by \p segment_selector
|
||||
*
|
||||
* @param[in] sgmnt_selector index to GDT table for specifying descriptor to get
|
||||
* @retval NULL FAILED segment_selector out of GDT range
|
||||
* @retval pointer to GDT table at \p segment_selector
|
||||
*/
|
||||
extern segment_descriptors* i386_get_gdt_entry (uint16_t sgmnt_selector);
|
||||
|
||||
/**
|
||||
* @brief Extracts base address from GDT entry pointed to by \p gdt_entry
|
||||
*
|
||||
* @param[in] gdt_entry pointer to entry from which base should be retrieved
|
||||
* @retval base address from GDT entry
|
||||
*/
|
||||
RTEMS_INLINE_ROUTINE void* i386_base_gdt_entry (segment_descriptors* gdt_entry)
|
||||
{
|
||||
return (void*)(gdt_entry->base_address_15_0 |
|
||||
(gdt_entry->base_address_23_16<<16) |
|
||||
(gdt_entry->base_address_31_24<<24));
|
||||
}
|
||||
|
||||
/**
|
||||
* @brief Extracts limit in bytes from GDT entry pointed to by \p gdt_entry
|
||||
*
|
||||
* @param[in] gdt_entry pointer to entry from which limit should be retrieved
|
||||
* @retval limit value in bytes from GDT entry
|
||||
*/
|
||||
extern uint32_t i386_limit_gdt_entry (segment_descriptors* gdt_entry);
|
||||
|
||||
/*
|
||||
* See page 11.18 Figure 11-12.
|
||||
*
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
unsigned int offset : 12;
|
||||
unsigned int page : 10;
|
||||
unsigned int directory : 10;
|
||||
}la_bits;
|
||||
|
||||
typedef union {
|
||||
la_bits bits;
|
||||
unsigned int address;
|
||||
}linear_address;
|
||||
|
||||
|
||||
/*
|
||||
* See page 11.20 Figure 11-14.
|
||||
*
|
||||
*/
|
||||
|
||||
typedef struct {
|
||||
unsigned int present : 1;
|
||||
unsigned int writable : 1;
|
||||
unsigned int user : 1;
|
||||
unsigned int write_through : 1;
|
||||
unsigned int cache_disable : 1;
|
||||
unsigned int accessed : 1;
|
||||
unsigned int reserved1 : 1;
|
||||
unsigned int page_size : 1;
|
||||
unsigned int reserved2 : 1;
|
||||
unsigned int available : 3;
|
||||
unsigned int page_frame_address : 20;
|
||||
}page_dir_bits;
|
||||
|
||||
typedef union {
|
||||
page_dir_bits bits;
|
||||
unsigned int dir_entry;
|
||||
}page_dir_entry;
|
||||
|
||||
typedef struct {
|
||||
unsigned int present : 1;
|
||||
unsigned int writable : 1;
|
||||
unsigned int user : 1;
|
||||
unsigned int write_through : 1;
|
||||
unsigned int cache_disable : 1;
|
||||
unsigned int accessed : 1;
|
||||
unsigned int dirty : 1;
|
||||
unsigned int reserved2 : 2;
|
||||
unsigned int available : 3;
|
||||
unsigned int page_frame_address : 20;
|
||||
}page_table_bits;
|
||||
|
||||
typedef union {
|
||||
page_table_bits bits;
|
||||
unsigned int table_entry;
|
||||
} page_table_entry;
|
||||
|
||||
/*
|
||||
* definitions related to page table entry
|
||||
*/
|
||||
#define PG_SIZE 0x1000
|
||||
#define MASK_OFFSET 0xFFF
|
||||
#define MAX_ENTRY (PG_SIZE/sizeof(page_dir_entry))
|
||||
#define FOUR_MB 0x400000
|
||||
#define MASK_FLAGS 0x1A
|
||||
|
||||
#define PTE_PRESENT 0x01
|
||||
#define PTE_WRITABLE 0x02
|
||||
#define PTE_USER 0x04
|
||||
#define PTE_WRITE_THROUGH 0x08
|
||||
#define PTE_CACHE_DISABLE 0x10
|
||||
|
||||
typedef struct {
|
||||
page_dir_entry pageDirEntry[MAX_ENTRY];
|
||||
} page_directory;
|
||||
|
||||
typedef struct {
|
||||
page_table_entry pageTableEntry[MAX_ENTRY];
|
||||
} page_table;
|
||||
|
||||
/* Simpler names for the i80x86 I/O instructions */
|
||||
#define outport_byte( _port, _value ) i386_outport_byte( _port, _value )
|
||||
#define outport_word( _port, _value ) i386_outport_word( _port, _value )
|
||||
#define outport_long( _port, _value ) i386_outport_long( _port, _value )
|
||||
@@ -251,7 +661,6 @@ int i386_Physical_to_real(
|
||||
#define inport_word( _port, _value ) i386_inport_word( _port, _value )
|
||||
#define inport_long( _port, _value ) i386_inport_long( _port, _value )
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
Reference in New Issue
Block a user