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1.2.6.2 ! ad 1: /* $NetBSD: frameasm.h,v 1.2.6.1 2007/10/23 20:11:42 ad Exp $ */
1.1 fvdl 2:
3: #ifndef _AMD64_MACHINE_FRAMEASM_H
4: #define _AMD64_MACHINE_FRAMEASM_H
1.2.6.2 ! ad 5: #include "opt_xen.h"
1.1 fvdl 6:
7: /*
8: * Macros to define pushing/popping frames for interrupts, traps
9: * and system calls. Currently all the same; will diverge later.
10: */
11:
1.2.6.2 ! ad 12: #ifdef XEN
! 13: #define HYPERVISOR_iret hypercall_page + (__HYPERVISOR_iret * 32)
! 14: /* Xen do not need swapgs, done by hypervisor */
! 15: #define swapgs
! 16: #define iretq pushq $0 ; jmp HYPERVISOR_iret
! 17: #endif
! 18:
1.1 fvdl 19: /*
20: * These are used on interrupt or trap entry or exit.
21: */
22: #define INTR_SAVE_GPRS \
23: subq $120,%rsp ; \
24: movq %r15,TF_R15(%rsp) ; \
25: movq %r14,TF_R14(%rsp) ; \
26: movq %r13,TF_R13(%rsp) ; \
27: movq %r12,TF_R12(%rsp) ; \
28: movq %r11,TF_R11(%rsp) ; \
29: movq %r10,TF_R10(%rsp) ; \
30: movq %r9,TF_R9(%rsp) ; \
31: movq %r8,TF_R8(%rsp) ; \
32: movq %rdi,TF_RDI(%rsp) ; \
33: movq %rsi,TF_RSI(%rsp) ; \
34: movq %rbp,TF_RBP(%rsp) ; \
35: movq %rbx,TF_RBX(%rsp) ; \
36: movq %rdx,TF_RDX(%rsp) ; \
37: movq %rcx,TF_RCX(%rsp) ; \
1.2.6.2 ! ad 38: movq %rax,TF_RAX(%rsp) ; \
! 39: cld
1.1 fvdl 40:
41: #define INTR_RESTORE_GPRS \
42: movq TF_R15(%rsp),%r15 ; \
43: movq TF_R14(%rsp),%r14 ; \
44: movq TF_R13(%rsp),%r13 ; \
45: movq TF_R12(%rsp),%r12 ; \
46: movq TF_R11(%rsp),%r11 ; \
47: movq TF_R10(%rsp),%r10 ; \
48: movq TF_R9(%rsp),%r9 ; \
49: movq TF_R8(%rsp),%r8 ; \
50: movq TF_RDI(%rsp),%rdi ; \
51: movq TF_RSI(%rsp),%rsi ; \
52: movq TF_RBP(%rsp),%rbp ; \
53: movq TF_RBX(%rsp),%rbx ; \
54: movq TF_RDX(%rsp),%rdx ; \
55: movq TF_RCX(%rsp),%rcx ; \
56: movq TF_RAX(%rsp),%rax ; \
57: addq $120,%rsp
58:
59: #define INTRENTRY \
60: subq $32,%rsp ; \
61: testq $SEL_UPL,56(%rsp) ; \
62: je 98f ; \
63: swapgs ; \
64: movw %gs,0(%rsp) ; \
65: movw %fs,8(%rsp) ; \
66: movw %es,16(%rsp) ; \
67: movw %ds,24(%rsp) ; \
68: 98: INTR_SAVE_GPRS
69:
1.2.6.2 ! ad 70: #ifndef XEN
1.1 fvdl 71: #define INTRFASTEXIT \
72: INTR_RESTORE_GPRS ; \
73: testq $SEL_UPL,56(%rsp) ; \
74: je 99f ; \
75: cli ; \
76: swapgs ; \
77: movw 0(%rsp),%gs ; \
78: movw 8(%rsp),%fs ; \
79: movw 16(%rsp),%es ; \
80: movw 24(%rsp),%ds ; \
81: 99: addq $48,%rsp ; \
82: iretq
83:
84: #define INTR_RECURSE_HWFRAME \
85: movq %rsp,%r10 ; \
86: movl %ss,%r11d ; \
87: pushq %r11 ; \
88: pushq %r10 ; \
89: pushfq ; \
90: movl %cs,%r11d ; \
91: pushq %r11 ; \
92: pushq %r13 ;
93:
1.2.6.2 ! ad 94: #else /* !XEN */
! 95: /*
! 96: * Disabling events before going to user mode sounds like a BAD idea
! 97: * do no restore gs either, HYPERVISOR_iret will do a swapgs
! 98: */
! 99: #define INTRFASTEXIT \
! 100: INTR_RESTORE_GPRS ; \
! 101: testq $SEL_UPL,56(%rsp) ; \
! 102: je 99f ; \
! 103: movw 8(%rsp),%fs ; \
! 104: movw 16(%rsp),%es ; \
! 105: movw 24(%rsp),%ds ; \
! 106: 99: addq $48,%rsp ; \
! 107: iretq
! 108:
! 109: /* We must fixup CS, as even kernel mode runs at CPL 3 */
! 110: #define INTR_RECURSE_HWFRAME \
! 111: movq %rsp,%r10 ; \
! 112: movl %ss,%r11d ; \
! 113: pushq %r11 ; \
! 114: pushq %r10 ; \
! 115: pushfq ; \
! 116: movl %cs,%r11d ; \
! 117: pushq %r11 ; \
! 118: andb $0xfc,(%rsp) ; \
! 119: pushq %r13 ;
! 120:
! 121: #endif /* !XEN */
! 122:
1.2.6.1 ad 123: #define DO_DEFERRED_SWITCH \
124: cmpq $0, CPUVAR(WANT_PMAPLOAD) ; \
125: jz 1f ; \
126: call _C_LABEL(do_pmap_load) ; \
127: 1:
128:
129: #define CHECK_DEFERRED_SWITCH \
130: cmpq $0, CPUVAR(WANT_PMAPLOAD)
1.1 fvdl 131:
1.2 ad 132: #define CHECK_ASTPENDING(reg) cmpq $0, reg ; \
1.1 fvdl 133: je 99f ; \
1.2 ad 134: cmpl $0, L_MD_ASTPENDING(reg) ; \
1.1 fvdl 135: 99:
136:
1.2 ad 137: #define CLEAR_ASTPENDING(reg) movl $0, L_MD_ASTPENDING(reg)
1.1 fvdl 138:
1.2.6.2 ! ad 139: #ifdef XEN
! 140: #define CLI(reg1,reg2) \
! 141: movl CPUVAR(CPUID),%e/**/reg1 ; \
! 142: shlq $6,%r/**/reg1 ; \
! 143: movq _C_LABEL(HYPERVISOR_shared_info),%r/**/reg2 ; \
! 144: addq %r/**/reg1,%r/**/reg2 ; \
! 145: movb $1,EVTCHN_UPCALL_MASK(%r/**/reg2)
! 146: #define STI(reg1,reg2) \
! 147: movl CPUVAR(CPUID),%e/**/reg1 ; \
! 148: shlq $6,%r/**/reg1 ; \
! 149: movq _C_LABEL(HYPERVISOR_shared_info),%r/**/reg2 ; \
! 150: addq %r/**/reg1,%r/**/reg2 ; \
! 151: movb $0,EVTCHN_UPCALL_MASK(%r/**/reg2)
! 152: #else /* XEN */
! 153: #define CLI(reg1,reg2) cli
! 154: #define STI(reg1,reg2) sti
! 155: #endif /* XEN */
! 156:
! 157: #ifdef XEN
! 158: #define CLI(reg1,reg2) \
! 159: movl CPUVAR(CPUID),%e/**/reg1 ; \
! 160: shlq $6,%r/**/reg1 ; \
! 161: movq _C_LABEL(HYPERVISOR_shared_info),%r/**/reg2 ; \
! 162: addq %r/**/reg1,%r/**/reg2 ; \
! 163: movb $1,EVTCHN_UPCALL_MASK(%r/**/reg2)
! 164: #define STI(reg1,reg2) \
! 165: movl CPUVAR(CPUID),%e/**/reg1 ; \
! 166: shlq $6,%r/**/reg1 ; \
! 167: movq _C_LABEL(HYPERVISOR_shared_info),%r/**/reg2 ; \
! 168: addq %r/**/reg1,%r/**/reg2 ; \
! 169: movb $0,EVTCHN_UPCALL_MASK(%r/**/reg2)
! 170: #else /* XEN */
! 171: #define CLI(reg1,reg2) cli
! 172: #define STI(reg1,reg2) sti
! 173: #endif /* XEN */
! 174:
1.1 fvdl 175: #endif /* _AMD64_MACHINE_FRAMEASM_H */