1/*	$NetBSD: frameasm.h,v 1.14 2008/07/07 13:01:16 gmcgarry Exp $	*/
2
3#ifndef _I386_FRAMEASM_H_
4#define _I386_FRAMEASM_H_
5
6#ifdef _KERNEL_OPT
7#include "opt_multiprocessor.h"
8#include "opt_xen.h"
9#endif
10
11#if !defined(XEN)
12#define CLI(reg)        cli
13#define STI(reg)        sti
14#else
15/* XXX assym.h */
16#define TRAP_INSTR      int $0x82
17#define XEN_BLOCK_EVENTS(reg)   movb $1,EVTCHN_UPCALL_MASK(reg)
18#define XEN_UNBLOCK_EVENTS(reg) movb $0,EVTCHN_UPCALL_MASK(reg)
19#define XEN_TEST_PENDING(reg)   testb $0xFF,EVTCHN_UPCALL_PENDING(reg)
20
21#define CLI(reg)        movl    CPUVAR(VCPU),reg ;  \
22                        XEN_BLOCK_EVENTS(reg)
23#define STI(reg)        movl    CPUVAR(VCPU),reg ;  \
24			XEN_UNBLOCK_EVENTS(reg)
25#define STIC(reg)       movl    CPUVAR(VCPU),reg ;  \
26			XEN_UNBLOCK_EVENTS(reg)  ; \
27			testb $0xff,EVTCHN_UPCALL_PENDING(reg)
28#endif
29
30#ifndef TRAPLOG
31#define TLOG		/**/
32#else
33/*
34 * Fill in trap record
35 */
36#define TLOG						\
379:							\
38	movl	%fs:CPU_TLOG_OFFSET, %eax;		\
39	movl	%fs:CPU_TLOG_BASE, %ebx;		\
40	addl	$SIZEOF_TREC,%eax;			\
41	andl	$SIZEOF_TLOG-1,%eax;			\
42	addl	%eax,%ebx;				\
43	movl	%eax,%fs:CPU_TLOG_OFFSET;		\
44	movl	%esp,TREC_SP(%ebx);			\
45	movl	$9b,TREC_HPC(%ebx);			\
46	movl	TF_EIP(%esp),%eax;			\
47	movl	%eax,TREC_IPC(%ebx);			\
48	rdtsc			;			\
49	movl	%eax,TREC_TSC(%ebx);			\
50	movl	$MSR_LASTBRANCHFROMIP,%ecx;		\
51	rdmsr			;			\
52	movl	%eax,TREC_LBF(%ebx);			\
53	incl	%ecx		;			\
54	rdmsr			;			\
55	movl	%eax,TREC_LBT(%ebx);			\
56	incl	%ecx		;			\
57	rdmsr			;			\
58	movl	%eax,TREC_IBF(%ebx);			\
59	incl	%ecx		;			\
60	rdmsr			;			\
61	movl	%eax,TREC_IBT(%ebx)
62#endif
63
64/*
65 * These are used on interrupt or trap entry or exit.
66 */
67#define	INTRENTRY \
68	subl	$TF_PUSHSIZE,%esp	; \
69	movw	%gs,TF_GS(%esp)	; \
70	movw	%fs,TF_FS(%esp) ; \
71	movl	%eax,TF_EAX(%esp)	; \
72	movw	%es,TF_ES(%esp) ; \
73	movw	%ds,TF_DS(%esp) ; \
74	movl	$GSEL(GDATA_SEL, SEL_KPL),%eax	; \
75	movl	%edi,TF_EDI(%esp)	; \
76	movl	%esi,TF_ESI(%esp)	; \
77	movw	%ax,%ds	; \
78	movl	%ebp,TF_EBP(%esp)	; \
79	movw	%ax,%es	; \
80	movl	%ebx,TF_EBX(%esp)	; \
81	movw	%ax,%gs	; \
82	movl	%edx,TF_EDX(%esp)	; \
83	movl	$GSEL(GCPU_SEL, SEL_KPL),%eax	; \
84	movl	%ecx,TF_ECX(%esp)	; \
85	movl	%eax,%fs	; \
86	cld			; \
87	TLOG
88
89/*
90 * INTRFASTEXIT should be in sync with trap(), resume_iret and friends.
91 */
92#define	INTRFASTEXIT \
93	movw	TF_GS(%esp),%gs	; \
94	movw	TF_FS(%esp),%fs	; \
95	movw	TF_ES(%esp),%es	; \
96	movw	TF_DS(%esp),%ds	; \
97	movl	TF_EDI(%esp),%edi	; \
98	movl	TF_ESI(%esp),%esi	; \
99	movl	TF_EBP(%esp),%ebp	; \
100	movl	TF_EBX(%esp),%ebx	; \
101	movl	TF_EDX(%esp),%edx	; \
102	movl	TF_ECX(%esp),%ecx	; \
103	movl	TF_EAX(%esp),%eax	; \
104	addl	$(TF_PUSHSIZE+8),%esp	; \
105	iret
106
107#define	DO_DEFERRED_SWITCH \
108	cmpl	$0, CPUVAR(WANT_PMAPLOAD)		; \
109	jz	1f					; \
110	call	_C_LABEL(pmap_load)			; \
111	1:
112
113#define	DO_DEFERRED_SWITCH_RETRY \
114	1:						; \
115	cmpl	$0, CPUVAR(WANT_PMAPLOAD)		; \
116	jz	1f					; \
117	call	_C_LABEL(pmap_load)			; \
118	jmp	1b					; \
119	1:
120
121#define	CHECK_DEFERRED_SWITCH \
122	cmpl	$0, CPUVAR(WANT_PMAPLOAD)
123
124#define	CHECK_ASTPENDING(reg)	movl	CPUVAR(CURLWP),reg	; \
125				cmpl	$0, L_MD_ASTPENDING(reg)
126#define	CLEAR_ASTPENDING(reg)	movl	$0, L_MD_ASTPENDING(reg)
127
128/*
129 * IDEPTH_INCR:
130 * increase ci_idepth and switch to the interrupt stack if necessary.
131 * note that the initial value of ci_idepth is -1.
132 *
133 * => should be called with interrupt disabled.
134 * => save the old value of %esp in %eax.
135 */
136
137#define	IDEPTH_INCR \
138	incl	CPUVAR(IDEPTH); \
139	movl	%esp, %eax; \
140	jne	999f; \
141	movl	CPUVAR(INTRSTACK), %esp; \
142999:	pushl	%eax; /* eax == pointer to intrframe */ \
143
144/*
145 * IDEPTH_DECR:
146 * decrement ci_idepth and switch back to
147 * the original stack saved by IDEPTH_INCR.
148 *
149 * => should be called with interrupt disabled.
150 */
151
152#define	IDEPTH_DECR \
153	popl	%esp; \
154	decl	CPUVAR(IDEPTH)
155
156#endif /* _I386_FRAMEASM_H_ */
157