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Server : Apache/2.4.18 (Ubuntu) System : Linux canvaswebdesign 3.13.0-71-generic #114-Ubuntu SMP Tue Dec 1 02:34:22 UTC 2015 x86_64 User : oppastar ( 1041) PHP Version : 7.0.33-0ubuntu0.16.04.15 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority, Directory : /usr/src/linux-headers-4.4.0-79/arch/x86/include/asm/ |
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#ifndef _ASM_X86_BIOS_EBDA_H
#define _ASM_X86_BIOS_EBDA_H
#include <asm/io.h>
/*
* Returns physical address of EBDA. Returns 0 if there is no EBDA.
*/
static inline unsigned int get_bios_ebda(void)
{
/*
* There is a real-mode segmented pointer pointing to the
* 4K EBDA area at 0x40E.
*/
unsigned int address = *(unsigned short *)phys_to_virt(0x40E);
address <<= 4;
return address; /* 0 means none */
}
/*
* Return the sanitized length of the EBDA in bytes, if it exists.
*/
static inline unsigned int get_bios_ebda_length(void)
{
unsigned int address;
unsigned int length;
address = get_bios_ebda();
if (!address)
return 0;
/* EBDA length is byte 0 of the EBDA (stored in KiB) */
length = *(unsigned char *)phys_to_virt(address);
length <<= 10;
/* Trim the length if it extends beyond 640KiB */
length = min_t(unsigned int, (640 * 1024) - address, length);
return length;
}
void reserve_ebda_region(void);
#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
/*
* This is obviously not a great place for this, but we want to be
* able to scatter it around anywhere in the kernel.
*/
void check_for_bios_corruption(void);
void start_periodic_check_for_corruption(void);
#else
static inline void check_for_bios_corruption(void)
{
}
static inline void start_periodic_check_for_corruption(void)
{
}
#endif
#endif /* _ASM_X86_BIOS_EBDA_H */