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031fe7af WL |
1 | /* |
2 | * x86_64 cpu init and loop | |
3 | * | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | #ifndef _TARGET_ARCH_CPU_H_ | |
20 | #define _TARGET_ARCH_CPU_H_ | |
21 | ||
22 | #include "target_arch.h" | |
23 | ||
24 | #define TARGET_DEFAULT_CPU_MODEL "qemu64" | |
25 | ||
031fe7af WL |
26 | static inline void target_cpu_init(CPUX86State *env, |
27 | struct target_pt_regs *regs) | |
28 | { | |
29 | uint64_t *gdt_table; | |
30 | ||
31 | env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; | |
32 | env->hflags |= HF_PE_MASK | HF_CPL_MASK; | |
33 | if (env->features[FEAT_1_EDX] & CPUID_SSE) { | |
34 | env->cr[4] |= CR4_OSFXSR_MASK; | |
35 | env->hflags |= HF_OSFXSR_MASK; | |
36 | } | |
37 | ||
38 | /* enable 64 bit mode if possible */ | |
39 | if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) { | |
40 | fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n"); | |
41 | exit(1); | |
42 | } | |
43 | env->cr[4] |= CR4_PAE_MASK; | |
44 | env->efer |= MSR_EFER_LMA | MSR_EFER_LME; | |
45 | env->hflags |= HF_LMA_MASK; | |
46 | ||
47 | /* flags setup : we activate the IRQs by default as in user mode */ | |
48 | env->eflags |= IF_MASK; | |
49 | ||
50 | /* register setup */ | |
51 | env->regs[R_EAX] = regs->rax; | |
52 | env->regs[R_EBX] = regs->rbx; | |
53 | env->regs[R_ECX] = regs->rcx; | |
54 | env->regs[R_EDX] = regs->rdx; | |
55 | env->regs[R_ESI] = regs->rsi; | |
56 | env->regs[R_EDI] = regs->rdi; | |
57 | env->regs[R_EBP] = regs->rbp; | |
58 | env->regs[R_ESP] = regs->rsp; | |
59 | env->eip = regs->rip; | |
60 | ||
61 | /* interrupt setup */ | |
62 | env->idt.limit = 511; | |
63 | ||
64 | env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1), | |
65 | PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); | |
66 | bsd_x86_64_set_idt_base(env->idt.base); | |
67 | bsd_x86_64_set_idt(0, 0); | |
68 | bsd_x86_64_set_idt(1, 0); | |
69 | bsd_x86_64_set_idt(2, 0); | |
70 | bsd_x86_64_set_idt(3, 3); | |
71 | bsd_x86_64_set_idt(4, 3); | |
72 | bsd_x86_64_set_idt(5, 0); | |
73 | bsd_x86_64_set_idt(6, 0); | |
74 | bsd_x86_64_set_idt(7, 0); | |
75 | bsd_x86_64_set_idt(8, 0); | |
76 | bsd_x86_64_set_idt(9, 0); | |
77 | bsd_x86_64_set_idt(10, 0); | |
78 | bsd_x86_64_set_idt(11, 0); | |
79 | bsd_x86_64_set_idt(12, 0); | |
80 | bsd_x86_64_set_idt(13, 0); | |
81 | bsd_x86_64_set_idt(14, 0); | |
82 | bsd_x86_64_set_idt(15, 0); | |
83 | bsd_x86_64_set_idt(16, 0); | |
84 | bsd_x86_64_set_idt(17, 0); | |
85 | bsd_x86_64_set_idt(18, 0); | |
86 | bsd_x86_64_set_idt(19, 0); | |
87 | bsd_x86_64_set_idt(0x80, 3); | |
88 | ||
89 | /* segment setup */ | |
90 | env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES, | |
91 | PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); | |
92 | env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1; | |
93 | gdt_table = g2h_untagged(env->gdt.base); | |
94 | ||
95 | /* 64 bit code segment */ | |
96 | bsd_x86_64_write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff, | |
97 | DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | DESC_L_MASK | |
98 | | (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); | |
99 | ||
100 | bsd_x86_64_write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff, | |
101 | DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | | |
102 | (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); | |
103 | ||
104 | cpu_x86_load_seg(env, R_CS, __USER_CS); | |
105 | cpu_x86_load_seg(env, R_SS, __USER_DS); | |
106 | cpu_x86_load_seg(env, R_DS, 0); | |
107 | cpu_x86_load_seg(env, R_ES, 0); | |
108 | cpu_x86_load_seg(env, R_FS, 0); | |
109 | cpu_x86_load_seg(env, R_GS, 0); | |
110 | } | |
111 | ||
112 | static inline void target_cpu_loop(CPUX86State *env) | |
113 | { | |
114 | CPUState *cs = env_cpu(env); | |
115 | int trapnr; | |
116 | abi_ulong pc; | |
117 | /* target_siginfo_t info; */ | |
118 | ||
119 | for (;;) { | |
120 | cpu_exec_start(cs); | |
121 | trapnr = cpu_exec(cs); | |
122 | cpu_exec_end(cs); | |
123 | process_queued_cpu_work(cs); | |
124 | ||
125 | switch (trapnr) { | |
126 | case 0x80: | |
127 | /* syscall from int $0x80 */ | |
128 | if (bsd_type == target_freebsd) { | |
129 | abi_ulong params = (abi_ulong) env->regs[R_ESP] + | |
130 | sizeof(int32_t); | |
131 | int32_t syscall_nr = env->regs[R_EAX]; | |
132 | int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8; | |
133 | ||
134 | if (syscall_nr == TARGET_FREEBSD_NR_syscall) { | |
135 | get_user_s32(syscall_nr, params); | |
136 | params += sizeof(int32_t); | |
137 | } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) { | |
138 | get_user_s32(syscall_nr, params); | |
139 | params += sizeof(int64_t); | |
140 | } | |
141 | get_user_s32(arg1, params); | |
142 | params += sizeof(int32_t); | |
143 | get_user_s32(arg2, params); | |
144 | params += sizeof(int32_t); | |
145 | get_user_s32(arg3, params); | |
146 | params += sizeof(int32_t); | |
147 | get_user_s32(arg4, params); | |
148 | params += sizeof(int32_t); | |
149 | get_user_s32(arg5, params); | |
150 | params += sizeof(int32_t); | |
151 | get_user_s32(arg6, params); | |
152 | params += sizeof(int32_t); | |
153 | get_user_s32(arg7, params); | |
154 | params += sizeof(int32_t); | |
155 | get_user_s32(arg8, params); | |
156 | env->regs[R_EAX] = do_freebsd_syscall(env, | |
157 | syscall_nr, | |
158 | arg1, | |
159 | arg2, | |
160 | arg3, | |
161 | arg4, | |
162 | arg5, | |
163 | arg6, | |
164 | arg7, | |
165 | arg8); | |
166 | } else { /* if (bsd_type == target_openbsd) */ | |
167 | env->regs[R_EAX] = do_openbsd_syscall(env, | |
168 | env->regs[R_EAX], | |
169 | env->regs[R_EBX], | |
170 | env->regs[R_ECX], | |
171 | env->regs[R_EDX], | |
172 | env->regs[R_ESI], | |
173 | env->regs[R_EDI], | |
174 | env->regs[R_EBP]); | |
175 | } | |
176 | if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { | |
177 | env->regs[R_EAX] = -env->regs[R_EAX]; | |
178 | env->eflags |= CC_C; | |
179 | } else { | |
180 | env->eflags &= ~CC_C; | |
181 | } | |
182 | break; | |
183 | ||
184 | case EXCP_SYSCALL: | |
185 | /* syscall from syscall instruction */ | |
186 | if (bsd_type == target_freebsd) { | |
187 | env->regs[R_EAX] = do_freebsd_syscall(env, | |
188 | env->regs[R_EAX], | |
189 | env->regs[R_EDI], | |
190 | env->regs[R_ESI], | |
191 | env->regs[R_EDX], | |
192 | env->regs[R_ECX], | |
193 | env->regs[8], | |
194 | env->regs[9], 0, 0); | |
195 | } else { /* if (bsd_type == target_openbsd) */ | |
196 | env->regs[R_EAX] = do_openbsd_syscall(env, | |
197 | env->regs[R_EAX], | |
198 | env->regs[R_EDI], | |
199 | env->regs[R_ESI], | |
200 | env->regs[R_EDX], | |
201 | env->regs[10], | |
202 | env->regs[8], | |
203 | env->regs[9]); | |
204 | } | |
205 | env->eip = env->exception_next_eip; | |
206 | if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) { | |
207 | env->regs[R_EAX] = -env->regs[R_EAX]; | |
208 | env->eflags |= CC_C; | |
209 | } else { | |
210 | env->eflags &= ~CC_C; | |
211 | } | |
212 | break; | |
213 | ||
214 | case EXCP_INTERRUPT: | |
215 | /* just indicate that signals should be handled asap */ | |
216 | break; | |
217 | ||
218 | case EXCP_ATOMIC: | |
219 | cpu_exec_step_atomic(cs); | |
220 | break; | |
221 | ||
222 | default: | |
223 | pc = env->segs[R_CS].base + env->eip; | |
224 | fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - " | |
225 | "aborting\n", (long)pc, trapnr); | |
226 | abort(); | |
227 | } | |
228 | process_pending_signals(env); | |
229 | } | |
230 | } | |
231 | ||
232 | static inline void target_cpu_clone_regs(CPUX86State *env, target_ulong newsp) | |
233 | { | |
234 | if (newsp) { | |
235 | env->regs[R_ESP] = newsp; | |
236 | } | |
237 | env->regs[R_EAX] = 0; | |
238 | } | |
239 | ||
240 | static inline void target_cpu_reset(CPUArchState *cpu) | |
241 | { | |
242 | cpu_reset(env_cpu(cpu)); | |
243 | } | |
244 | ||
245 | #endif /* ! _TARGET_ARCH_CPU_H_ */ |