[mirror_ubuntu-artful-kernel.git] / arch / x86 / xen / xen-head.S

/* Xen-specific pieces of head.S, intended to be included in the right
	place in head.S */

#ifdef CONFIG_XEN

#include <linux/elfnote.h>
#include <linux/init.h>

#include <asm/boot.h>
#include <asm/asm.h>
#include <asm/page_types.h>

#include <xen/interface/elfnote.h>
#include <xen/interface/features.h>
#include <xen/interface/xen.h>
#include <xen/interface/xen-mca.h>
#include <asm/xen/interface.h>

	__INIT
ENTRY(startup_xen)
	cld

	/* Clear .bss */
	xor %eax,%eax
	mov $__bss_start, %_ASM_DI
	mov $__bss_stop, %_ASM_CX
	sub %_ASM_DI, %_ASM_CX
	shr $__ASM_SEL(2, 3), %_ASM_CX
	rep __ASM_SIZE(stos)

	mov %_ASM_SI, xen_start_info
	mov $init_thread_union+THREAD_SIZE, %_ASM_SP

	jmp xen_start_kernel

	__FINIT

.pushsection .text
	.balign PAGE_SIZE
ENTRY(hypercall_page)
	.skip PAGE_SIZE

#define HYPERCALL(n) \
	.equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \
	.type xen_hypercall_##n, @function; .size xen_hypercall_##n, 32
#include <asm/xen-hypercalls.h>
#undef HYPERCALL

.popsection

	ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS,       .asciz "linux")
	ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION,  .asciz "2.6")
	ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION,    .asciz "xen-3.0")
#ifdef CONFIG_X86_32
	ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE,      _ASM_PTR __PAGE_OFFSET)
#else
	ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE,      _ASM_PTR __START_KERNEL_map)
	/* Map the p2m table to a 512GB-aligned user address. */
	ELFNOTE(Xen, XEN_ELFNOTE_INIT_P2M,       .quad PGDIR_SIZE)
#endif
	ELFNOTE(Xen, XEN_ELFNOTE_ENTRY,          _ASM_PTR startup_xen)
	ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page)
	ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,
		.ascii "!writable_page_tables|pae_pgdir_above_4gb")
	ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES,
		.long (1 << XENFEAT_writable_page_tables) | (1 << XENFEAT_dom0))
	ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE,       .asciz "yes")
	ELFNOTE(Xen, XEN_ELFNOTE_LOADER,         .asciz "generic")
	ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,
		.quad _PAGE_PRESENT; .quad _PAGE_PRESENT)
	ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1)
	ELFNOTE(Xen, XEN_ELFNOTE_MOD_START_PFN,  .long 1)
	ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW,   _ASM_PTR __HYPERVISOR_VIRT_START)
	ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET,   _ASM_PTR 0)

#endif /*CONFIG_XEN */
Commit	Line	Data
5ead97c8 JF	1	/* Xen-specific pieces of head.S, intended to be included in the right
	2	place in head.S */
	3
	4	#ifdef CONFIG_XEN
	5
	6	#include <linux/elfnote.h>
08b6d290	7	#include <linux/init.h>
7077c33d	8
5ead97c8	9	#include <asm/boot.h>
7077c33d	10	#include <asm/asm.h>
0341c14d	11	#include <asm/page_types.h>
7077c33d	12
5ead97c8	13	#include <xen/interface/elfnote.h>
4e903a20	14	#include <xen/interface/features.h>
526abeae JG	15	#include <xen/interface/xen.h>
526abeae JG	16	#include <xen/interface/xen-mca.h>
7e0edc1b	17	#include <asm/xen/interface.h>
5ead97c8	18
08b6d290	19	__INIT
5ead97c8	20	ENTRY(startup_xen)
5ead97c8	21	cld
04b6b4a5 BO	22
	23	/* Clear .bss */
	24	xor %eax,%eax
	25	mov $__bss_start, %_ASM_DI
	26	mov $__bss_stop, %_ASM_CX
	27	sub %_ASM_DI, %_ASM_CX
	28	shr $__ASM_SEL(2, 3), %_ASM_CX
	29	rep __ASM_SIZE(stos)
	30
4478c407 BO	31	mov %_ASM_SI, xen_start_info
	32	mov $init_thread_union+THREAD_SIZE, %_ASM_SP
	33
5ead97c8	34	jmp xen_start_kernel
08b6d290 SR	35
08b6d290 SR	36	__FINIT
5ead97c8	37
a987b16c	38	.pushsection .text
7d0642b9	39	.balign PAGE_SIZE
5ead97c8	40	ENTRY(hypercall_page)
526abeae JG	41	.skip PAGE_SIZE
	42
	43	#define HYPERCALL(n) \
	44	.equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \
	45	.type xen_hypercall_##n, @function; .size xen_hypercall_##n, 32
	46	#include <asm/xen-hypercalls.h>
	47	#undef HYPERCALL
	48
5ead97c8 JF	49	.popsection
	50
	51	ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux")
	52	ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6")
	53	ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0")
8c5e5ac3	54	#ifdef CONFIG_X86_32
7077c33d	55	ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __PAGE_OFFSET)
8c5e5ac3 JF	56	#else
8c5e5ac3 JF	57	ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, _ASM_PTR __START_KERNEL_map)
8f5b0c63 JG	58	/* Map the p2m table to a 512GB-aligned user address. */
8f5b0c63 JG	59	ELFNOTE(Xen, XEN_ELFNOTE_INIT_P2M, .quad PGDIR_SIZE)
8c5e5ac3	60	#endif
7077c33d JF	61	ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen)
7077c33d JF	62	ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page)
063334f3 BO	63	ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,
	64	.ascii "!writable_page_tables\|pae_pgdir_above_4gb")
	65	ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES,
	66	.long (1 << XENFEAT_writable_page_tables) \| (1 << XENFEAT_dom0))
5ead97c8	67	ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes")
5ead97c8	68	ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic")
7e0edc1b JF	69	ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,
	70	.quad _PAGE_PRESENT; .quad _PAGE_PRESENT)
	71	ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long 1)
d1e9abd6	72	ELFNOTE(Xen, XEN_ELFNOTE_MOD_START_PFN, .long 1)
7077c33d	73	ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, _ASM_PTR __HYPERVISOR_VIRT_START)
8c5e5ac3	74	ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, _ASM_PTR 0)
5ead97c8 JF	75
5ead97c8 JF	76	#endif /CONFIG_XEN /