RTEMS 6.1-rc6
Loading...
Searching...
No Matches
Data Structures | Macros | Typedefs | Functions
i386.h File Reference

Intel I386 CPU Dependent Source. More...

#include <rtems/score/interrupts.h>
#include <rtems/score/registers.h>
#include <rtems/score/idtr.h>

Go to the source code of this file.

Data Structures

struct  __rtems_raw_irq_connect_data__
 
struct  rtems_raw_irq_global_settings
 
struct  RTEMS_PACKED
 Used for passing and retrieving registers content to/from real mode interrupt call. More...
 
struct  la_bits
 
union  linear_address
 
struct  page_dir_bits
 
union  page_dir_entry
 
struct  page_table_bits
 
union  page_table_entry
 
struct  page_directory
 
struct  page_table
 

Macros

#define I386_HAS_FPU   1
 
#define I386_HAS_BSWAP   1
 
#define CPU_NAME   "Intel i386"
 
#define CPU_swap_u32(_value)   i386_swap_u32( _value )
 
#define CPU_swap_u16(_value)   i386_swap_u16( _value )
 
#define i386_outport_byte(_port, _value)
 
#define i386_outport_word(_port, _value)
 
#define i386_outport_long(_port, _value)
 
#define i386_inport_byte(_port, _value)
 
#define i386_inport_word(_port, _value)
 
#define i386_inport_long(_port, _value)
 
#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
 
#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 )
 
#define inport_byte(_port, _value)   i386_inport_byte( _port, _value )
 
#define inport_word(_port, _value)   i386_inport_word( _port, _value )
 
#define inport_long(_port, _value)   i386_inport_long( _port, _value )
 

Typedefs

typedef unsigned char rtems_vector_offset
 
typedef struct __rtems_raw_irq_connect_data__ rtems_raw_irq_connect_data
 

Functions

void * i386_Logical_to_physical (unsigned short segment, void *address)
 
void * i386_Physical_to_logical (unsigned short segment, void *address)
 
int i386_Physical_to_real (void *address, uint16_t *segment, uint16_t *offset)
 Retrieves real mode pointer elements {segmnet, offset} from physical address.
 
rtems_raw_irq_hdl get_hdl_from_vector (rtems_vector_offset)
 
int i386_set_idt_entry (const rtems_raw_irq_connect_data *)
 
int i386_get_current_idt_entry (rtems_raw_irq_connect_data *)
 
int i386_delete_idt_entry (const rtems_raw_irq_connect_data *)
 
int i386_init_idt (rtems_raw_irq_global_settings *config)
 
int i386_get_idt_config (rtems_raw_irq_global_settings **config)
 
void i386_get_info_from_GDTR (segment_descriptors **table, uint16_t *limit)
 
void i386_set_GDTR (segment_descriptors *, uint16_t limit)
 
uint32_t i386_raw_gdt_entry (uint16_t segment_selector_index, segment_descriptors *sd)
 Allows to set a GDT entry.
 
void i386_fill_segment_desc_base (uint32_t base, segment_descriptors *sd)
 fills sd with provided base in appropriate fields of sd
 
void i386_fill_segment_desc_limit (uint32_t limit, segment_descriptors *sd)
 fills sd with provided limit in appropriate fields of sd
 
uint32_t i386_set_gdt_entry (uint16_t segment_selector, uint32_t base, uint32_t limit)
 
uint16_t i386_next_empty_gdt_entry (void)
 Returns next empty descriptor in GDT.
 
uint16_t i386_cpy_gdt_entry (uint16_t segment_selector, segment_descriptors *struct_to_fill)
 Copies GDT entry at index segment_selector to structure pointed to by struct_to_fill.
 
segment_descriptors * i386_get_gdt_entry (uint16_t sgmnt_selector)
 Returns pointer to GDT table at index given by segment_selector.
 
uint32_t i386_limit_gdt_entry (segment_descriptors *gdt_entry)
 Extracts limit in bytes from GDT entry pointed to by gdt_entry.
 

Detailed Description

Intel I386 CPU Dependent Source.

Macro Definition Documentation

◆ i386_inport_byte

#define i386_inport_byte (   _port,
  _value 
)
Value:
do { unsigned short __port = _port; \
unsigned char __value = 0; \
\
__asm__ volatile ( "inb %1,%0" : "=a" (__value) \
: "d" (__port) \
); \
_value = __value; \
} while (0)

◆ i386_inport_long

#define i386_inport_long (   _port,
  _value 
)
Value:
do { unsigned short __port = _port; \
unsigned int __value = 0; \
\
__asm__ volatile ( "inl %1,%0" : "=a" (__value) \
: "d" (__port) \
); \
_value = __value; \
} while (0)

◆ i386_inport_word

#define i386_inport_word (   _port,
  _value 
)
Value:
do { unsigned short __port = _port; \
unsigned short __value = 0; \
\
__asm__ volatile ( "inw %1,%0" : "=a" (__value) \
: "d" (__port) \
); \
_value = __value; \
} while (0)

◆ i386_outport_byte

#define i386_outport_byte (   _port,
  _value 
)
Value:
do { unsigned short __port = _port; \
unsigned char __value = _value; \
\
__asm__ volatile ( "outb %0,%1" : : "a" (__value), "d" (__port) ); \
} while (0)

◆ i386_outport_long

#define i386_outport_long (   _port,
  _value 
)
Value:
do { unsigned short __port = _port; \
unsigned int __value = _value; \
\
__asm__ volatile ( "outl %0,%1" : : "a" (__value), "d" (__port) ); \
} while (0)

◆ i386_outport_word

#define i386_outport_word (   _port,
  _value 
)
Value:
do { unsigned short __port = _port; \
unsigned short __value = _value; \
\
__asm__ volatile ( "outw %0,%1" : : "a" (__value), "d" (__port) ); \
} while (0)

Function Documentation

◆ i386_cpy_gdt_entry()

uint16_t i386_cpy_gdt_entry ( uint16_t  segment_selector,
segment_descriptors *  struct_to_fill 
)

Copies GDT entry at index segment_selector to structure pointed to by struct_to_fill.

Parameters
[in]segment_selectorindex to GDT table specifying descriptor to copy
[out]struct_to_fillpointer to memory where will be descriptor coppied
Return values
0FAILED segment_selector out of GDT range
<1;65535>retrieved segment_selector

◆ i386_fill_segment_desc_base()

void i386_fill_segment_desc_base ( uint32_t  base,
segment_descriptors *  sd 
)

fills sd with provided base in appropriate fields of sd

Parameters
[in]base32-bit address to be set as descriptor's base
[out]sddescriptor being filled with base

◆ i386_fill_segment_desc_limit()

void i386_fill_segment_desc_limit ( uint32_t  limit,
segment_descriptors *  sd 
)

fills sd with provided limit in appropriate fields of sd

sets granularity bit if necessary

Parameters
[in]limit32-bit value representing number of limit bytes
[out]sddescriptor being filled with limit

◆ i386_get_gdt_entry()

segment_descriptors * i386_get_gdt_entry ( uint16_t  sgmnt_selector)

Returns pointer to GDT table at index given by segment_selector.

Parameters
[in]sgmnt_selectorindex to GDT table for specifying descriptor to get
Return values
NULLFAILED segment_selector out of GDT range
pointerto GDT table at segment_selector

◆ i386_limit_gdt_entry()

uint32_t i386_limit_gdt_entry ( segment_descriptors *  gdt_entry)

Extracts limit in bytes from GDT entry pointed to by gdt_entry.

Parameters
[in]gdt_entrypointer to entry from which limit should be retrieved
Return values
limitvalue in bytes from GDT entry

◆ i386_next_empty_gdt_entry()

uint16_t i386_next_empty_gdt_entry ( void  )

Returns next empty descriptor in GDT.

Number of descriptors that can be returned depends on GDT_SIZE

Return values
0FAILED GDT is full
<1;65535>segment_selector number as index to GDT

◆ i386_Physical_to_real()

int i386_Physical_to_real ( void *  address,
uint16_t *  segment,
uint16_t *  offset 
)

Retrieves real mode pointer elements {segmnet, offset} from physical address.

i386_Physical_to_real Function returns the highest segment (base) address possible. Example: input address - 0x4B3A2 output segment - 0x4B3A offset - 0x2 input address - 0x10F12E output segment - 0xFFFF offset - 0xF13E

Parameters
[in]addressaddress to be converted, must be less than 0x10FFEF
[out]segmentsegment computed from address
[out]offsetoffset computed from address
Return values
0address not convertible
1segment and offset extracted

◆ i386_raw_gdt_entry()

uint32_t i386_raw_gdt_entry ( uint16_t  segment_selector_index,
segment_descriptors *  sd 
)

Allows to set a GDT entry.

Puts global descriptor sd to the global descriptor table on index segment_selector_index

Parameters
[in]segment_selector_indexindex to GDT entry
[in]sdstructure to be coppied to given segment_selector in GDT
Return values
0FAILED out of GDT range or index is 0, which is not valid index in GDT
1SUCCESS