RTOS/rtems
1
0
Fork 0
forked from Imagelibrary/rtems
Code Pull Requests Activity

i386: refactor libcpu/cpu.h into rtems/score/i386.h

Browse Source 
Fixes #2515.
This commit is contained in:
Joel Sherrill
2016-01-23 13:06:22 -06:00
committed by Gedare Bloom
parent dda25b19df
commit 328bd350aa
14 changed files with 477 additions and 508 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
c/src/lib/libbsp/i386/pc386/include/bsp.h
View File

@@ -57,7 +57,7 @@
#include <rtems/iosupp.h> #include <rtems/iosupp.h>
#include <rtems/console.h> #include <rtems/console.h>
#include <rtems/clockdrv.h> #include <rtems/clockdrv.h>
#include <libcpu/cpu.h> #include <rtems/score/cpu.h>
#include <rtems/bspIo.h> #include <rtems/bspIo.h>
#ifdef __cplusplus #ifdef __cplusplus

2
c/src/lib/libbsp/i386/shared/irq/idt.c
View File

@@ -16,7 +16,7 @@
* http://www.rtems.org/license/LICENSE. * http://www.rtems.org/license/LICENSE.
*/ */
#include <libcpu/cpu.h> #include <rtems/score/cpu.h>
#include <bsp/irq.h> #include <bsp/irq.h>
static rtems_raw_irq_connect_data* raw_irq_table; static rtems_raw_irq_connect_data* raw_irq_table;

2
c/src/lib/libbsp/i386/shared/irq/irq_init.c
View File

@@ -16,7 +16,7 @@
#include <rtems/bspIo.h> #include <rtems/bspIo.h>
#include <libcpu/cpu.h> #include <rtems/score/cpu.h>
#include <bsp.h> #include <bsp.h>
#include <bsp/irq.h> #include <bsp/irq.h>

2
c/src/lib/libbsp/i386/shared/realmode_int/realmode_int.h
View File

@@ -23,7 +23,7 @@
#ifndef _REALMODE_INT_H #ifndef _REALMODE_INT_H
#define _REALMODE_INT_H #define _REALMODE_INT_H
#include <libcpu/cpu.h> #include <rtems/score/cpu.h>
#include <stdint.h> #include <stdint.h>
#ifndef ASM /* ASM */ #ifndef ASM /* ASM */

2
c/src/lib/libbsp/i386/shared/smp/smp-imps.c
View File

@@ -79,7 +79,7 @@
#include <unistd.h> #include <unistd.h>
#include <rtems.h> #include <rtems.h>
#include <rtems/bspIo.h> #include <rtems/bspIo.h>
#include <libcpu/cpu.h> #include <rtems/score/cpu.h>
#include <assert.h> #include <assert.h>
extern void _pc386_delay(void); extern void _pc386_delay(void);

4
c/src/lib/libcpu/i386/Makefile.am
View File

@@ -6,7 +6,7 @@ include $(top_srcdir)/../../../automake/compile.am
include_libcpudir = $(includedir)/libcpu include_libcpudir = $(includedir)/libcpu
include_libcpu_HEADERS = cpu.h cpuModel.h include_libcpu_HEADERS = page.h cpuModel.h
include_libcpu_HEADERS += ../shared/include/cache.h include_libcpu_HEADERS += ../shared/include/cache.h
include_libcpu_HEADERS += byteorder.h include_libcpu_HEADERS += byteorder.h
@@ -22,7 +22,7 @@ score_rel_CPPFLAGS = $(AM_CPPFLAGS)
score_rel_LDFLAGS = $(RTEMS_RELLDFLAGS) score_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)
noinst_PROGRAMS += page.rel noinst_PROGRAMS += page.rel
page_rel_SOURCES = page.c cpu.h page_rel_SOURCES = page.c page.h
page_rel_CPPFLAGS = $(AM_CPPFLAGS) page_rel_CPPFLAGS = $(AM_CPPFLAGS)
page_rel_LDFLAGS = $(RTEMS_RELLDFLAGS) page_rel_LDFLAGS = $(RTEMS_RELLDFLAGS)

4
c/src/lib/libcpu/i386/cache.c
View File

@@ -3,9 +3,9 @@
*/ */
#include <rtems.h> #include <rtems.h>
#include <rtems/score/registers.h>
#include "cache_.h" #include "cache_.h"
#include <libcpu/cpu.h> #include <rtems/score/cpu.h>
#include <libcpu/page.h>
void _CPU_disable_cache(void) void _CPU_disable_cache(void)
{ {

475
c/src/lib/libcpu/i386/cpu.h
View File

@@ -1,475 +0,0 @@
/*
* @file cpu.h
*
* This file contains definitions for data structure related
* to Intel system programming. More information can be found
* on Intel site and more precisely in the following book :
*
* Pentium Processor familly
* Developper's Manual
*
* Volume 3 : Architecture and Programming Manual
*
* 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_CPU_H
#define _LIBCPU_i386_CPU_H
#include <rtems/score/registers.h>
#ifndef ASM
/*
* Interrupt Level Macros
*/
#include <rtems/score/interrupts.h>
#include <rtems/score/basedefs.h>
/*
* Segment Access Routines
*
* NOTE: Unfortunately, these are still static inlines even when the
* "macro" implementation of the generic code is used.
*/
static __inline__ unsigned short i386_get_cs(void)
{
register unsigned short segment = 0;
__asm__ volatile ( "movw %%cs,%0" : "=r" (segment) : "0" (segment) );
return segment;
}
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;
/* 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

2
c/src/lib/libcpu/i386/displayCpu.c
View File

@@ -20,7 +20,7 @@
* Tell us the machine setup.. * Tell us the machine setup..
*/ */
#include <stdio.h> #include <stdio.h>
#include <libcpu/cpu.h> #include <rtems/score/cpu.h>
#include <string.h> #include <string.h>
#include <libcpu/cpuModel.h> #include <libcpu/cpuModel.h>
#include <rtems/bspIo.h> #include <rtems/bspIo.h>

3
c/src/lib/libcpu/i386/page.c
View File

@@ -21,7 +21,8 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <rtems.h> #include <rtems.h>
#include <libcpu/cpu.h> #include <rtems/score/cpu.h>
#include <libcpu/page.h>
#define MEMORY_SIZE 0x4000000 /* 64Mo */ #define MEMORY_SIZE 0x4000000 /* 64Mo */

39
c/src/lib/libcpu/i386/page.h Normal file
View 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

6
c/src/lib/libcpu/i386/preinstall.am
View File

@@ -18,9 +18,9 @@ $(PROJECT_INCLUDE)/libcpu/$(dirstamp):
@: > $(PROJECT_INCLUDE)/libcpu/$(dirstamp) @: > $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
PREINSTALL_DIRS += $(PROJECT_INCLUDE)/libcpu/$(dirstamp) PREINSTALL_DIRS += $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
$(PROJECT_INCLUDE)/libcpu/cpu.h: cpu.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp) $(PROJECT_INCLUDE)/libcpu/page.h: page.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/cpu.h $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/page.h
PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/cpu.h PREINSTALL_FILES += $(PROJECT_INCLUDE)/libcpu/page.h
$(PROJECT_INCLUDE)/libcpu/cpuModel.h: cpuModel.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp) $(PROJECT_INCLUDE)/libcpu/cpuModel.h: cpuModel.h $(PROJECT_INCLUDE)/libcpu/$(dirstamp)
$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/cpuModel.h $(INSTALL_DATA) $< $(PROJECT_INCLUDE)/libcpu/cpuModel.h

5
cpukit/score/cpu/i386/rtems/score/cpu.h
View File

@@ -30,11 +30,6 @@ extern "C" {
#include <rtems/score/types.h> #include <rtems/score/types.h>
#include <rtems/score/i386.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 */ /* conditional compilation parameters */
#define CPU_INLINE_ENABLE_DISPATCH TRUE #define CPU_INLINE_ENABLE_DISPATCH TRUE

437
cpukit/score/cpu/i386/rtems/score/i386.h
View File

@@ -8,9 +8,12 @@
*/ */
/* /*
* COPYRIGHT (c) 1989-2013. * COPYRIGHT (c) 1989-2016.
* On-Line Applications Research Corporation (OAR). * 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 * The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at * found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE. * http://www.rtems.org/license/LICENSE.
@@ -23,6 +26,9 @@
extern "C" { extern "C" {
#endif #endif
#include <rtems/score/interrupts.h>
#include <rtems/score/registers.h>
/* /*
* This section contains the information required to build * This section contains the information required to build
* RTEMS for a particular member of the Intel i386 * RTEMS for a particular member of the Intel i386
@@ -112,6 +118,7 @@ static inline uint32_t i386_swap_u32(
#endif #endif
return( lout ); return( lout );
} }
#define CPU_swap_u32( _value ) i386_swap_u32( _value )
static inline uint16_t i386_swap_u16( static inline uint16_t i386_swap_u16(
uint16_t value uint16_t value
@@ -122,6 +129,7 @@ static inline uint16_t i386_swap_u16(
__asm__ volatile( "rorw $8,%0" : "=r" (sout) : "0" (value)); __asm__ volatile( "rorw $8,%0" : "=r" (sout) : "0" (value));
return (sout); return (sout);
} }
#define CPU_swap_u16( _value ) i386_swap_u16( _value )
/* /*
* Added for pagination management * 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. * physical address.
* *
* i386_Physical_to_real * 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() __asm__ volatile ( "movw %%cs,%0" : "=r" (segment) : "0" (segment) );
#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()
#define CPU_swap_u32( _value ) i386_swap_u32( _value ) return segment;
#define CPU_swap_u16( _value ) i386_swap_u16( _value ) }
/* 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_byte( _port, _value ) i386_outport_byte( _port, _value )
#define outport_word( _port, _value ) i386_outport_word( _port, _value ) #define outport_word( _port, _value ) i386_outport_word( _port, _value )
#define outport_long( _port, _value ) i386_outport_long( _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_word( _port, _value ) i386_inport_word( _port, _value )
#define inport_long( _port, _value ) i386_inport_long( _port, _value ) #define inport_long( _port, _value ) i386_inport_long( _port, _value )
#ifdef __cplusplus #ifdef __cplusplus
} }
#endif #endif