linux-sg2042/arch/x86/kernel/trampoline.c

19 lines
500 B
C

#include <linux/io.h>
#include <asm/trampoline.h>
/* ready for x86_64, no harm for x86, since it will overwrite after alloc */
unsigned char *trampoline_base = __va(TRAMPOLINE_BASE);
/*
* Currently trivial. Write the real->protected mode
* bootstrap into the page concerned. The caller
* has made sure it's suitably aligned.
*/
unsigned long setup_trampoline(void)
{
memcpy(trampoline_base, trampoline_data,
trampoline_end - trampoline_data);
return virt_to_phys(trampoline_base);
}