kip.h File Reference

Kernel Info Page access functions. More...

#include <l4/sys/compiler.h>
#include <l4/sys/l4int.h>
#include <l4/sys/__kip-arch.h>

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Data Structures
struct	l4_kernel_info_t
	L4 Kernel Interface Page. More...

Macros
#define	L4_KERNEL_INFO_MAGIC   (0x4BE6344CL) /* "L4µK" */
	Kernel Info Page identifier ("L4µK").
#define	l4_kip_for_each_feature(s)
	Cycle through kernel features given in the KIP.

Typedefs
typedef struct l4_kernel_info_t	l4_kernel_info_t
	L4 Kernel Interface Page.

Enumerations
enum	{ L4_KIP_OFFS_READ_US = 0x900 , L4_KIP_OFFS_READ_NS = 0x980 }

Functions
l4_kernel_info_t const *	l4_kip (void) L4_NOTHROW
	Get Kernel Info Page.
l4_umword_t	l4_kip_version (l4_kernel_info_t const *kip) L4_NOTHROW
	Get the kernel version.
const char *	l4_kip_version_string (l4_kernel_info_t const *kip) L4_NOTHROW
	Get the kernel version string.
int	l4_kernel_info_version_offset (l4_kernel_info_t const *kip) L4_NOTHROW
	Return offset in bytes of version_strings relative to the KIP base.
l4_cpu_time_t	l4_kip_clock (l4_kernel_info_t const *kip) L4_NOTHROW
	Return clock value from the KIP.
l4_umword_t	l4_kip_clock_lw (l4_kernel_info_t const *kip) L4_NOTHROW
	Return least significant machine word of clock value from the KIP.
l4_uint64_t	l4_kip_clock_ns (l4_kernel_info_t const *kip) L4_NOTHROW
	Return current clock using the KIP in nanoseconds.
int	l4_kip_kernel_has_feature (l4_kernel_info_t const *kip, char const *str)
	Check if kernel supports a feature.

Detailed Description

Kernel Info Page access functions.

Definition in file kip.h.

Macro Definition Documentation

l4_kip_for_each_feature

#define l4_kip_for_each_feature

(

s

)

Value:

        for (s += __builtin_strlen(s) + 1; *s; s += __builtin_strlen(s) + 1)

Cycle through kernel features given in the KIP.

Cycles through all KIP kernel feature strings. s must be a character pointer (char const *) initialized with l4_kip_version_string().

Definition at line 272 of file kip.h.

Referenced by l4_kip_kernel_has_feature().

Function Documentation

l4_kip_kernel_has_feature()

int l4_kip_kernel_has_feature ( l4_kernel_info_t const * kip, char const * str )

inline

Check if kernel supports a feature.

Parameters

kip	Pointer to the kernel info page (KIP).
str	Feature name to check.

Returns

1 if the kernel supports the feature, 0 if not.

Checks the feature field in the KIP for the given string.

Definition at line 286 of file kip.h.

References l4_kip_for_each_feature, and l4_kip_version_string().

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