IA32 Port I/O API

Collaboration diagram for IA32 Port I/O API:

Functions
int	l4util_ioport_map (l4_cap_idx_t sigma0id, unsigned port_start, unsigned log2size)
	Map a range of I/O ports.
l4_uint8_t	l4util_in8 (l4_uint16_t port)
	Read byte from I/O port.
l4_uint16_t	l4util_in16 (l4_uint16_t port)
	Read 16-bit-value from I/O port.
l4_uint32_t	l4util_in32 (l4_uint16_t port)
	Read 32-bit-value from I/O port.
void	l4util_ins8 (l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
	Read a block of 8-bit-values from I/O ports.
void	l4util_ins16 (l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
	Read a block of 16-bit-values from I/O ports.
void	l4util_ins32 (l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
	Read a block of 32-bit-values from I/O ports.
void	l4util_out8 (l4_uint8_t value, l4_uint16_t port)
	Write byte to I/O port.
void	l4util_out16 (l4_uint16_t value, l4_uint16_t port)
	Write 16-bit-value to I/O port.
void	l4util_out32 (l4_uint32_t value, l4_uint16_t port)
	Write 32-bit-value to I/O port.
void	l4util_outs8 (l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
	Write a block of bytes to I/O port.
void	l4util_outs16 (l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
	Write a block of 16-bit-values to I/O port.
void	l4util_outs32 (l4_uint16_t port, l4_umword_t addr, l4_umword_t count)
	Write block of 32-bit-values to I/O port.
void	l4util_iodelay (void)
	delay I/O port access by writing to port 0x80

Detailed Description

Function Documentation

l4util_in16()

l4_uint16_t l4util_in16 ( l4_uint16_t  port )

inline

Read 16-bit-value from I/O port.

Parameters

port	I/O port address

Returns

value

Definition at line 178 of file port_io.h.

l4util_in32()

l4_uint32_t l4util_in32 ( l4_uint16_t  port )

inline

Read 32-bit-value from I/O port.

Parameters

port	I/O port address

Returns

value

Definition at line 186 of file port_io.h.

l4util_in8()

l4_uint8_t l4util_in8 ( l4_uint16_t  port )

inline

Read byte from I/O port.

Parameters

port	I/O port address

Returns

value

Definition at line 170 of file port_io.h.

Referenced by l4util_irq_acknowledge().

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l4util_ins16()

void l4util_ins16 ( l4_uint16_t  port, l4_umword_t  addr, l4_umword_t  count  )

inline

Read a block of 16-bit-values from I/O ports.

Parameters

port	I/O port address
addr	address of buffer
count	number of I/O operations

Definition at line 203 of file port_io.h.

l4util_ins32()

void l4util_ins32 ( l4_uint16_t  port, l4_umword_t  addr, l4_umword_t  count  )

inline

Read a block of 32-bit-values from I/O ports.

Parameters

port	I/O port address
addr	address of buffer
count	number of I/O operations

Definition at line 212 of file port_io.h.

l4util_ins8()

void l4util_ins8 ( l4_uint16_t  port, l4_umword_t  addr, l4_umword_t  count  )

inline

Read a block of 8-bit-values from I/O ports.

Parameters

port	I/O port address
addr	address of buffer
count	number of I/O operations

Definition at line 194 of file port_io.h.

l4util_ioport_map()

int l4util_ioport_map ( l4_cap_idx_t  sigma0id, unsigned  port_start, unsigned  log2size  )

inline

Map a range of I/O ports.

Parameters

sigma0id	I/O port service (sigma0).
port_start	(Start) Port to request.
log2size	Log2size of range to request.

Returns

IPC result: 0 if the range could be successfully mapped on error: IPC failure, or -L4_ENOENT if nothing mapped

Definition at line 54 of file port_io.h.

References l4_buf_regs_t::bdr, l4_buf_regs_t::br, L4_ENOENT, l4_iofpage(), l4_ipc_call(), l4_ipc_error(), L4_IPC_NEVER, L4_ITEM_MAP, l4_msgtag(), l4_msgtag_items(), L4_PROTO_IO_PAGE_FAULT, l4_utcb(), l4_utcb_br(), l4_utcb_mr(), l4_msg_regs_t::mr, and l4_fpage_t::raw.

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l4util_out16()

void l4util_out16 ( l4_uint16_t  value, l4_uint16_t  port  )

inline

Write 16-bit-value to I/O port.

Parameters

port	I/O port address
value	value to write

Definition at line 227 of file port_io.h.

l4util_out32()

void l4util_out32 ( l4_uint32_t  value, l4_uint16_t  port  )

inline

Write 32-bit-value to I/O port.

Parameters

port	I/O port address
value	value to write

Definition at line 233 of file port_io.h.

l4util_out8()

void l4util_out8 ( l4_uint8_t  value, l4_uint16_t  port  )

inline

Write byte to I/O port.

Parameters

port	I/O port address
value	value to write

Definition at line 221 of file port_io.h.

Referenced by l4util_irq_acknowledge().

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l4util_outs16()

void l4util_outs16 ( l4_uint16_t  port, l4_umword_t  addr, l4_umword_t  count  )

inline

Write a block of 16-bit-values to I/O port.

Parameters

port	I/O port address
addr	address of buffer
count	number of I/O operations

Definition at line 248 of file port_io.h.

l4util_outs32()

void l4util_outs32 ( l4_uint16_t  port, l4_umword_t  addr, l4_umword_t  count  )

inline

Write block of 32-bit-values to I/O port.

Parameters

port	I/O port address
addr	address of buffer
count	number of I/O operations

Definition at line 257 of file port_io.h.

l4util_outs8()

void l4util_outs8 ( l4_uint16_t  port, l4_umword_t  addr, l4_umword_t  count  )

inline

Write a block of bytes to I/O port.

Parameters

port	I/O port address
addr	address of buffer
count	number of I/O operations

Definition at line 239 of file port_io.h.