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frameasm.h revision 1.7 
      1 /*	$NetBSD: frameasm.h,v 1.7 2007/11/14 11:09:49 ad Exp $	*/
      2 
      3 #ifndef _AMD64_MACHINE_FRAMEASM_H
      4 #define _AMD64_MACHINE_FRAMEASM_H
      5 
      6 /*
      7  * Macros to define pushing/popping frames for interrupts, traps
      8  * and system calls. Currently all the same; will diverge later.
      9  */
     10 
     11 /*
     12  * These are used on interrupt or trap entry or exit.
     13  */
     14 #define INTR_SAVE_GPRS \
     15 	subq	$120,%rsp	; \
     16 	movq	%r15,TF_R15(%rsp)	; \
     17 	movq	%r14,TF_R14(%rsp)	; \
     18 	movq	%r13,TF_R13(%rsp)	; \
     19 	movq	%r12,TF_R12(%rsp)	; \
     20 	movq	%r11,TF_R11(%rsp)	; \
     21 	movq	%r10,TF_R10(%rsp)	; \
     22 	movq	%r9,TF_R9(%rsp)		; \
     23 	movq	%r8,TF_R8(%rsp)		; \
     24 	movq	%rdi,TF_RDI(%rsp)	; \
     25 	movq	%rsi,TF_RSI(%rsp)	; \
     26 	movq	%rbp,TF_RBP(%rsp)	; \
     27 	movq	%rbx,TF_RBX(%rsp)	; \
     28 	movq	%rdx,TF_RDX(%rsp)	; \
     29 	movq	%rcx,TF_RCX(%rsp)	; \
     30 	movq	%rax,TF_RAX(%rsp)	; \
     31 	cld
     32 
     33 #define	INTR_RESTORE_GPRS \
     34 	movq	TF_R15(%rsp),%r15	; \
     35 	movq	TF_R14(%rsp),%r14	; \
     36 	movq	TF_R13(%rsp),%r13	; \
     37 	movq	TF_R12(%rsp),%r12	; \
     38 	movq	TF_R11(%rsp),%r11	; \
     39 	movq	TF_R10(%rsp),%r10	; \
     40 	movq	TF_R9(%rsp),%r9		; \
     41 	movq	TF_R8(%rsp),%r8		; \
     42 	movq	TF_RDI(%rsp),%rdi	; \
     43 	movq	TF_RSI(%rsp),%rsi	; \
     44 	movq	TF_RBP(%rsp),%rbp	; \
     45 	movq	TF_RBX(%rsp),%rbx	; \
     46 	movq	TF_RDX(%rsp),%rdx	; \
     47 	movq	TF_RCX(%rsp),%rcx	; \
     48 	movq	TF_RAX(%rsp),%rax	; \
     49 	addq	$120,%rsp
     50 
     51 #define	INTRENTRY \
     52 	subq	$32,%rsp		; \
     53 	testq	$SEL_UPL,56(%rsp)	; \
     54 	je	98f			; \
     55 	swapgs				; \
     56 	movw	%gs,0(%rsp)		; \
     57 	movw	%fs,8(%rsp)		; \
     58 	movw	%es,16(%rsp)		; \
     59 	movw	%ds,24(%rsp)		; \
     60 98: 	INTR_SAVE_GPRS
     61 
     62 #define INTRFASTEXIT \
     63 	INTR_RESTORE_GPRS 		; \
     64 	testq	$SEL_UPL,56(%rsp)	; \
     65 	je	99f			; \
     66 	cli				; \
     67 	swapgs				; \
     68 	movw	0(%rsp),%gs		; \
     69 	movw	8(%rsp),%fs		; \
     70 	movw	16(%rsp),%es		; \
     71 	movw	24(%rsp),%ds		; \
     72 99:	addq	$48,%rsp		; \
     73 	iretq
     74 
     75 #define INTR_RECURSE_HWFRAME \
     76 	movq	%rsp,%r10		; \
     77 	movl	%ss,%r11d		; \
     78 	pushq	%r11			; \
     79 	pushq	%r10			; \
     80 	pushfq				; \
     81 	movl	%cs,%r11d		; \
     82 	pushq	%r11			; \
     83 	pushq	%r13			;
     84 
     85 #define	DO_DEFERRED_SWITCH \
     86 	cmpq	$0, CPUVAR(WANT_PMAPLOAD)		; \
     87 	jz	1f					; \
     88 	call	_C_LABEL(do_pmap_load)			; \
     89 	1:
     90 
     91 #define	CHECK_DEFERRED_SWITCH \
     92 	cmpq	$0, CPUVAR(WANT_PMAPLOAD)
     93 
     94 #define CHECK_ASTPENDING(reg)	cmpq	$0, reg				; \
     95 				je	99f				; \
     96 				cmpl	$0, L_MD_ASTPENDING(reg)	; \
     97 				99:
     98 
     99 #define CLEAR_ASTPENDING(reg)	movl	$0, L_MD_ASTPENDING(reg)
    100 
    101 #endif /* _AMD64_MACHINE_FRAMEASM_H */
    102