[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / asm-i386 / kexec.h

#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)

#define MAX_NOTE_BYTES 1024

/* CPU does not save ss and esp 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->esp = (unsigned long)&(oldregs->esp);
	__asm__ __volatile__(
			"xorl %%eax, %%eax\n\t"
			"movw %%ss, %%ax\n\t"
			:"=a"(newregs->xss));
}

/*
 * This function is responsible for capturing register states if coming
 * via panic otherwise just fix up the ss and esp 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->ebx));
               __asm__ __volatile__("movl %%ecx,%0" : "=m"(newregs->ecx));
               __asm__ __volatile__("movl %%edx,%0" : "=m"(newregs->edx));
               __asm__ __volatile__("movl %%esi,%0" : "=m"(newregs->esi));
               __asm__ __volatile__("movl %%edi,%0" : "=m"(newregs->edi));
               __asm__ __volatile__("movl %%ebp,%0" : "=m"(newregs->ebp));
               __asm__ __volatile__("movl %%eax,%0" : "=m"(newregs->eax));
               __asm__ __volatile__("movl %%esp,%0" : "=m"(newregs->esp));
               __asm__ __volatile__("movw %%ss, %%ax;" :"=a"(newregs->xss));
               __asm__ __volatile__("movw %%cs, %%ax;" :"=a"(newregs->xcs));
               __asm__ __volatile__("movw %%ds, %%ax;" :"=a"(newregs->xds));
               __asm__ __volatile__("movw %%es, %%ax;" :"=a"(newregs->xes));
               __asm__ __volatile__("pushfl; popl %0" :"=m"(newregs->eflags));

               newregs->eip = (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 */
Commit	Line	Data
5033cba0 EB	1	#ifndef _I386_KEXEC_H
	2	#define _I386_KEXEC_H
	3
3566561b MD	4	#define PA_CONTROL_PAGE 0
	5	#define VA_CONTROL_PAGE 1
	6	#define PA_PGD 2
	7	#define VA_PGD 3
	8	#define PA_PTE_0 4
	9	#define VA_PTE_0 5
	10	#define PA_PTE_1 6
	11	#define VA_PTE_1 7
	12	#ifdef CONFIG_X86_PAE
	13	#define PA_PMD_0 8
	14	#define VA_PMD_0 9
	15	#define PA_PMD_1 10
	16	#define VA_PMD_1 11
	17	#define PAGES_NR 12
	18	#else
	19	#define PAGES_NR 8
	20	#endif
	21
	22	#ifndef __ASSEMBLY__
	23
e996e581	24	#include <asm/ptrace.h>
f05b6902	25	#include <asm/string.h>
5033cba0 EB	26
	27	/*
	28	* KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
	29	* I.e. Maximum page that is mapped directly into kernel memory,
	30	* and kmap is not required.
5033cba0 EB	31	*/
	32
	33	/* Maximum physical address we can use pages from */
	34	#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
	35	/* Maximum address we can reach in physical address mode */
	36	#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
	37	/* Maximum address we can use for the control code buffer */
	38	#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
	39
	40	#define KEXEC_CONTROL_CODE_SIZE 4096
	41
	42	/* The native architecture */
	43	#define KEXEC_ARCH KEXEC_ARCH_386
	44
79e03011 IC	45	/* We can also handle crash dumps from 64 bit kernel. */
	46	#define vmcore_elf_check_arch_cross(x) ((x)->e_machine == EM_X86_64)
	47
625f1c82	48	#define MAX_NOTE_BYTES 1024
625f1c82	49
e996e581 VG	50	/* CPU does not save ss and esp on stack if execution is already
	51	* running in kernel mode at the time of NMI occurrence. This code
	52	* fixes it.
	53	*/
	54	static inline void crash_fixup_ss_esp(struct pt_regs *newregs,
	55	struct pt_regs *oldregs)
	56	{
	57	memcpy(newregs, oldregs, sizeof(*newregs));
	58	newregs->esp = (unsigned long)&(oldregs->esp);
	59	__asm__ __volatile__(
	60	"xorl %%eax, %%eax\n\t"
	61	"movw %%ss, %%ax\n\t"
	62	:"=a"(newregs->xss));
	63	}
	64
	65	/*
	66	* This function is responsible for capturing register states if coming
	67	* via panic otherwise just fix up the ss and esp if coming via kernel
	68	* mode exception.
	69	*/
	70	static inline void crash_setup_regs(struct pt_regs *newregs,
	71	struct pt_regs *oldregs)
	72	{
	73	if (oldregs)
	74	crash_fixup_ss_esp(newregs, oldregs);
	75	else {
	76	__asm__ __volatile__("movl %%ebx,%0" : "=m"(newregs->ebx));
	77	__asm__ __volatile__("movl %%ecx,%0" : "=m"(newregs->ecx));
	78	__asm__ __volatile__("movl %%edx,%0" : "=m"(newregs->edx));
	79	__asm__ __volatile__("movl %%esi,%0" : "=m"(newregs->esi));
	80	__asm__ __volatile__("movl %%edi,%0" : "=m"(newregs->edi));
	81	__asm__ __volatile__("movl %%ebp,%0" : "=m"(newregs->ebp));
	82	__asm__ __volatile__("movl %%eax,%0" : "=m"(newregs->eax));
	83	__asm__ __volatile__("movl %%esp,%0" : "=m"(newregs->esp));
	84	__asm__ __volatile__("movw %%ss, %%ax;" :"=a"(newregs->xss));
	85	__asm__ __volatile__("movw %%cs, %%ax;" :"=a"(newregs->xcs));
	86	__asm__ __volatile__("movw %%ds, %%ax;" :"=a"(newregs->xds));
	87	__asm__ __volatile__("movw %%es, %%ax;" :"=a"(newregs->xes));
	88	__asm__ __volatile__("pushfl; popl %0" :"=m"(newregs->eflags));
	89
	90	newregs->eip = (unsigned long)current_text_addr();
	91	}
	92	}
3566561b MD	93	asmlinkage NORET_TYPE void
	94	relocate_kernel(unsigned long indirection_page,
	95	unsigned long control_page,
	96	unsigned long start_address,
	97	unsigned int has_pae) ATTRIB_NORET;
	98
	99	#endif /* __ASSEMBLY__ */
e996e581	100
5033cba0	101	#endif /* _I386_KEXEC_H */