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#ifndef _I386_KEXEC_H
#define _I386_KEXEC_H
#define PA_CONTROL_PAGE 0
#define VA_CONTROL_PAGE 1
#define PA_PGD 2
#define VA_PGD 3
#define PA_PTE_0 4
#define VA_PTE_0 5
#define PA_PTE_1 6
#define VA_PTE_1 7
#ifdef CONFIG_X86_PAE
#define PA_PMD_0 8
#define VA_PMD_0 9
#define PA_PMD_1 10
#define VA_PMD_1 11
#define PAGES_NR 12
#else
#define PAGES_NR 8
#endif
#ifndef __ASSEMBLY__
#include <asm/ptrace.h>
#include <asm/string.h>
/*
* KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
* I.e. Maximum page that is mapped directly into kernel memory,
* and kmap is not required.
*/
/* Maximum physical address we can use pages from */
#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
/* Maximum address we can reach in physical address mode */
#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
/* Maximum address we can use for the control code buffer */
#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
#define KEXEC_CONTROL_CODE_SIZE 4096
/* The native architecture */
#define KEXEC_ARCH KEXEC_ARCH_386
/* We can also handle crash dumps from 64 bit kernel. */
#define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
/* CPU does not save ss and sp on stack if execution is already
* running in kernel mode at the time of NMI occurrence. This code
* fixes it.
*/
static inline void crash_fixup_ss_esp(struct pt_regs *newregs,
struct pt_regs *oldregs)
{
memcpy(newregs, oldregs, sizeof(*newregs));
newregs->sp = (unsigned long)&(oldregs->sp);
__asm__ __volatile__(
"xorl %%eax, %%eax\n\t"
"movw %%ss, %%ax\n\t"
:"=a"(newregs->ss));
}
/*
* This function is responsible for capturing register states if coming
* via panic otherwise just fix up the ss and sp if coming via kernel
* mode exception.
*/
static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs)
{
if (oldregs)
crash_fixup_ss_esp(newregs, oldregs);
else {
__asm__ __volatile__("movl %%ebx,%0" : "=m"(newregs->bx));
__asm__ __volatile__("movl %%ecx,%0" : "=m"(newregs->cx));
__asm__ __volatile__("movl %%edx,%0" : "=m"(newregs->dx));
__asm__ __volatile__("movl %%esi,%0" : "=m"(newregs->si));
__asm__ __volatile__("movl %%edi,%0" : "=m"(newregs->di));
__asm__ __volatile__("movl %%ebp,%0" : "=m"(newregs->bp));
__asm__ __volatile__("movl %%eax,%0" : "=m"(newregs->ax));
__asm__ __volatile__("movl %%esp,%0" : "=m"(newregs->sp));
__asm__ __volatile__("movl %%ss, %%eax;" :"=a"(newregs->ss));
__asm__ __volatile__("movl %%cs, %%eax;" :"=a"(newregs->cs));
__asm__ __volatile__("movl %%ds, %%eax;" :"=a"(newregs->ds));
__asm__ __volatile__("movl %%es, %%eax;" :"=a"(newregs->es));
__asm__ __volatile__("pushfl; popl %0" :"=m"(newregs->flags));
newregs->ip = (unsigned long)current_text_addr();
}
}
asmlinkage NORET_TYPE void
relocate_kernel(unsigned long indirection_page,
unsigned long control_page,
unsigned long start_address,
unsigned int has_pae) ATTRIB_NORET;
#endif /* __ASSEMBLY__ */
#endif /* _I386_KEXEC_H */
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