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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
3 | * Copyright (C) 2005 Sergey Bondari |
3 | * Copyright (C) 2005 Sergey Bondari |
4 | * All rights reserved. |
4 | * All rights reserved. |
5 | * |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
8 | * are met: |
9 | * |
9 | * |
10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | * |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | 29 | ||
30 | #ifndef __ia32_ASM_H__ |
30 | #ifndef __ia32_ASM_H__ |
31 | #define __ia32_ASM_H__ |
31 | #define __ia32_ASM_H__ |
32 | 32 | ||
- | 33 | #include <arch/pm.h> |
|
33 | #include <arch/types.h> |
34 | #include <arch/types.h> |
34 | #include <config.h> |
35 | #include <config.h> |
35 | 36 | ||
36 | extern __u32 interrupt_handler_size; |
37 | extern __u32 interrupt_handler_size; |
37 | 38 | ||
38 | extern void paging_on(void); |
39 | extern void paging_on(void); |
39 | 40 | ||
40 | extern void interrupt_handlers(void); |
41 | extern void interrupt_handlers(void); |
41 | 42 | ||
42 | extern void enable_l_apic_in_msr(void); |
43 | extern void enable_l_apic_in_msr(void); |
43 | 44 | ||
44 | 45 | ||
45 | extern void asm_delay_loop(__u32 t); |
46 | extern void asm_delay_loop(__u32 t); |
46 | extern void asm_fake_loop(__u32 t); |
47 | extern void asm_fake_loop(__u32 t); |
47 | 48 | ||
48 | 49 | ||
49 | /** Halt CPU |
50 | /** Halt CPU |
50 | * |
51 | * |
51 | * Halt the current CPU until interrupt event. |
52 | * Halt the current CPU until interrupt event. |
52 | */ |
53 | */ |
53 | static inline void cpu_halt(void) { __asm__("hlt\n"); }; |
54 | static inline void cpu_halt(void) { __asm__("hlt\n"); }; |
54 | static inline void cpu_sleep(void) { __asm__("hlt\n"); }; |
55 | static inline void cpu_sleep(void) { __asm__("hlt\n"); }; |
55 | 56 | ||
56 | #define GEN_READ_REG(reg) static inline __native read_ ##reg (void) \ |
57 | #define GEN_READ_REG(reg) static inline __native read_ ##reg (void) \ |
57 | { \ |
58 | { \ |
58 | __native res; \ |
59 | __native res; \ |
59 | __asm__ volatile ("movl %%" #reg ", %0" : "=r" (res) ); \ |
60 | __asm__ volatile ("movl %%" #reg ", %0" : "=r" (res) ); \ |
60 | return res; \ |
61 | return res; \ |
61 | } |
62 | } |
62 | 63 | ||
63 | #define GEN_WRITE_REG(reg) static inline void write_ ##reg (__native regn) \ |
64 | #define GEN_WRITE_REG(reg) static inline void write_ ##reg (__native regn) \ |
64 | { \ |
65 | { \ |
65 | __asm__ volatile ("movl %0, %%" #reg : : "r" (regn)); \ |
66 | __asm__ volatile ("movl %0, %%" #reg : : "r" (regn)); \ |
66 | } |
67 | } |
67 | 68 | ||
68 | GEN_READ_REG(cr0); |
69 | GEN_READ_REG(cr0); |
69 | GEN_READ_REG(cr2); |
70 | GEN_READ_REG(cr2); |
70 | GEN_READ_REG(cr3); |
71 | GEN_READ_REG(cr3); |
71 | GEN_WRITE_REG(cr3); |
72 | GEN_WRITE_REG(cr3); |
72 | 73 | ||
73 | GEN_READ_REG(dr0); |
74 | GEN_READ_REG(dr0); |
74 | GEN_READ_REG(dr1); |
75 | GEN_READ_REG(dr1); |
75 | GEN_READ_REG(dr2); |
76 | GEN_READ_REG(dr2); |
76 | GEN_READ_REG(dr3); |
77 | GEN_READ_REG(dr3); |
77 | GEN_READ_REG(dr6); |
78 | GEN_READ_REG(dr6); |
78 | GEN_READ_REG(dr7); |
79 | GEN_READ_REG(dr7); |
79 | 80 | ||
80 | GEN_WRITE_REG(dr0); |
81 | GEN_WRITE_REG(dr0); |
81 | GEN_WRITE_REG(dr1); |
82 | GEN_WRITE_REG(dr1); |
82 | GEN_WRITE_REG(dr2); |
83 | GEN_WRITE_REG(dr2); |
83 | GEN_WRITE_REG(dr3); |
84 | GEN_WRITE_REG(dr3); |
84 | GEN_WRITE_REG(dr6); |
85 | GEN_WRITE_REG(dr6); |
85 | GEN_WRITE_REG(dr7); |
86 | GEN_WRITE_REG(dr7); |
86 | 87 | ||
87 | /** Byte to port |
88 | /** Byte to port |
88 | * |
89 | * |
89 | * Output byte to port |
90 | * Output byte to port |
90 | * |
91 | * |
91 | * @param port Port to write to |
92 | * @param port Port to write to |
92 | * @param val Value to write |
93 | * @param val Value to write |
93 | */ |
94 | */ |
94 | static inline void outb(__u16 port, __u8 val) { __asm__ volatile ("outb %b0, %w1\n" : : "a" (val), "d" (port) ); } |
95 | static inline void outb(__u16 port, __u8 val) { __asm__ volatile ("outb %b0, %w1\n" : : "a" (val), "d" (port) ); } |
95 | 96 | ||
96 | /** Word to port |
97 | /** Word to port |
97 | * |
98 | * |
98 | * Output word to port |
99 | * Output word to port |
99 | * |
100 | * |
100 | * @param port Port to write to |
101 | * @param port Port to write to |
101 | * @param val Value to write |
102 | * @param val Value to write |
102 | */ |
103 | */ |
103 | static inline void outw(__u16 port, __u16 val) { __asm__ volatile ("outw %w0, %w1\n" : : "a" (val), "d" (port) ); } |
104 | static inline void outw(__u16 port, __u16 val) { __asm__ volatile ("outw %w0, %w1\n" : : "a" (val), "d" (port) ); } |
104 | 105 | ||
105 | /** Double word to port |
106 | /** Double word to port |
106 | * |
107 | * |
107 | * Output double word to port |
108 | * Output double word to port |
108 | * |
109 | * |
109 | * @param port Port to write to |
110 | * @param port Port to write to |
110 | * @param val Value to write |
111 | * @param val Value to write |
111 | */ |
112 | */ |
112 | static inline void outl(__u16 port, __u32 val) { __asm__ volatile ("outl %l0, %w1\n" : : "a" (val), "d" (port) ); } |
113 | static inline void outl(__u16 port, __u32 val) { __asm__ volatile ("outl %l0, %w1\n" : : "a" (val), "d" (port) ); } |
113 | 114 | ||
114 | /** Byte from port |
115 | /** Byte from port |
115 | * |
116 | * |
116 | * Get byte from port |
117 | * Get byte from port |
117 | * |
118 | * |
118 | * @param port Port to read from |
119 | * @param port Port to read from |
119 | * @return Value read |
120 | * @return Value read |
120 | */ |
121 | */ |
121 | static inline __u8 inb(__u16 port) { __u8 val; __asm__ volatile ("inb %w1, %b0 \n" : "=a" (val) : "d" (port) ); return val; } |
122 | static inline __u8 inb(__u16 port) { __u8 val; __asm__ volatile ("inb %w1, %b0 \n" : "=a" (val) : "d" (port) ); return val; } |
122 | 123 | ||
123 | /** Word from port |
124 | /** Word from port |
124 | * |
125 | * |
125 | * Get word from port |
126 | * Get word from port |
126 | * |
127 | * |
127 | * @param port Port to read from |
128 | * @param port Port to read from |
128 | * @return Value read |
129 | * @return Value read |
129 | */ |
130 | */ |
130 | static inline __u16 inw(__u16 port) { __u16 val; __asm__ volatile ("inw %w1, %w0 \n" : "=a" (val) : "d" (port) ); return val; } |
131 | static inline __u16 inw(__u16 port) { __u16 val; __asm__ volatile ("inw %w1, %w0 \n" : "=a" (val) : "d" (port) ); return val; } |
131 | 132 | ||
132 | /** Double word from port |
133 | /** Double word from port |
133 | * |
134 | * |
134 | * Get double word from port |
135 | * Get double word from port |
135 | * |
136 | * |
136 | * @param port Port to read from |
137 | * @param port Port to read from |
137 | * @return Value read |
138 | * @return Value read |
138 | */ |
139 | */ |
139 | static inline __u32 inl(__u16 port) { __u32 val; __asm__ volatile ("inl %w1, %l0 \n" : "=a" (val) : "d" (port) ); return val; } |
140 | static inline __u32 inl(__u16 port) { __u32 val; __asm__ volatile ("inl %w1, %l0 \n" : "=a" (val) : "d" (port) ); return val; } |
140 | 141 | ||
141 | /** Enable interrupts. |
142 | /** Enable interrupts. |
142 | * |
143 | * |
143 | * Enable interrupts and return previous |
144 | * Enable interrupts and return previous |
144 | * value of EFLAGS. |
145 | * value of EFLAGS. |
145 | * |
146 | * |
146 | * @return Old interrupt priority level. |
147 | * @return Old interrupt priority level. |
147 | */ |
148 | */ |
148 | static inline ipl_t interrupts_enable(void) |
149 | static inline ipl_t interrupts_enable(void) |
149 | { |
150 | { |
150 | ipl_t v; |
151 | ipl_t v; |
151 | __asm__ volatile ( |
152 | __asm__ volatile ( |
152 | "pushf\n\t" |
153 | "pushf\n\t" |
153 | "popl %0\n\t" |
154 | "popl %0\n\t" |
154 | "sti\n" |
155 | "sti\n" |
155 | : "=r" (v) |
156 | : "=r" (v) |
156 | ); |
157 | ); |
157 | return v; |
158 | return v; |
158 | } |
159 | } |
159 | 160 | ||
160 | /** Disable interrupts. |
161 | /** Disable interrupts. |
161 | * |
162 | * |
162 | * Disable interrupts and return previous |
163 | * Disable interrupts and return previous |
163 | * value of EFLAGS. |
164 | * value of EFLAGS. |
164 | * |
165 | * |
165 | * @return Old interrupt priority level. |
166 | * @return Old interrupt priority level. |
166 | */ |
167 | */ |
167 | static inline ipl_t interrupts_disable(void) |
168 | static inline ipl_t interrupts_disable(void) |
168 | { |
169 | { |
169 | ipl_t v; |
170 | ipl_t v; |
170 | __asm__ volatile ( |
171 | __asm__ volatile ( |
171 | "pushf\n\t" |
172 | "pushf\n\t" |
172 | "popl %0\n\t" |
173 | "popl %0\n\t" |
173 | "cli\n" |
174 | "cli\n" |
174 | : "=r" (v) |
175 | : "=r" (v) |
175 | ); |
176 | ); |
176 | return v; |
177 | return v; |
177 | } |
178 | } |
178 | 179 | ||
179 | /** Restore interrupt priority level. |
180 | /** Restore interrupt priority level. |
180 | * |
181 | * |
181 | * Restore EFLAGS. |
182 | * Restore EFLAGS. |
182 | * |
183 | * |
183 | * @param ipl Saved interrupt priority level. |
184 | * @param ipl Saved interrupt priority level. |
184 | */ |
185 | */ |
185 | static inline void interrupts_restore(ipl_t ipl) |
186 | static inline void interrupts_restore(ipl_t ipl) |
186 | { |
187 | { |
187 | __asm__ volatile ( |
188 | __asm__ volatile ( |
188 | "pushl %0\n\t" |
189 | "pushl %0\n\t" |
189 | "popf\n" |
190 | "popf\n" |
190 | : : "r" (ipl) |
191 | : : "r" (ipl) |
191 | ); |
192 | ); |
192 | } |
193 | } |
193 | 194 | ||
194 | /** Return interrupt priority level. |
195 | /** Return interrupt priority level. |
195 | * |
196 | * |
196 | * @return EFLAFS. |
197 | * @return EFLAFS. |
197 | */ |
198 | */ |
198 | static inline ipl_t interrupts_read(void) |
199 | static inline ipl_t interrupts_read(void) |
199 | { |
200 | { |
200 | ipl_t v; |
201 | ipl_t v; |
201 | __asm__ volatile ( |
202 | __asm__ volatile ( |
202 | "pushf\n\t" |
203 | "pushf\n\t" |
203 | "popl %0\n" |
204 | "popl %0\n" |
204 | : "=r" (v) |
205 | : "=r" (v) |
205 | ); |
206 | ); |
206 | return v; |
207 | return v; |
207 | } |
208 | } |
208 | 209 | ||
209 | /** Return base address of current stack |
210 | /** Return base address of current stack |
210 | * |
211 | * |
211 | * Return the base address of the current stack. |
212 | * Return the base address of the current stack. |
212 | * The stack is assumed to be STACK_SIZE bytes long. |
213 | * The stack is assumed to be STACK_SIZE bytes long. |
213 | * The stack must start on page boundary. |
214 | * The stack must start on page boundary. |
214 | */ |
215 | */ |
215 | static inline __address get_stack_base(void) |
216 | static inline __address get_stack_base(void) |
216 | { |
217 | { |
217 | __address v; |
218 | __address v; |
218 | 219 | ||
219 | __asm__ volatile ("andl %%esp, %0\n" : "=r" (v) : "0" (~(STACK_SIZE-1))); |
220 | __asm__ volatile ("andl %%esp, %0\n" : "=r" (v) : "0" (~(STACK_SIZE-1))); |
220 | 221 | ||
221 | return v; |
222 | return v; |
222 | } |
223 | } |
223 | 224 | ||
224 | static inline __u64 rdtsc(void) |
225 | static inline __u64 rdtsc(void) |
225 | { |
226 | { |
226 | __u64 v; |
227 | __u64 v; |
227 | 228 | ||
228 | __asm__ volatile("rdtsc\n" : "=A" (v)); |
229 | __asm__ volatile("rdtsc\n" : "=A" (v)); |
229 | 230 | ||
230 | return v; |
231 | return v; |
231 | } |
232 | } |
232 | 233 | ||
233 | /** Return current IP address */ |
234 | /** Return current IP address */ |
234 | static inline __address * get_ip() |
235 | static inline __address * get_ip() |
235 | { |
236 | { |
236 | __address *ip; |
237 | __address *ip; |
237 | 238 | ||
238 | __asm__ volatile ( |
239 | __asm__ volatile ( |
239 | "mov %%eip, %0" |
240 | "mov %%eip, %0" |
240 | : "=r" (ip) |
241 | : "=r" (ip) |
241 | ); |
242 | ); |
242 | return ip; |
243 | return ip; |
243 | } |
244 | } |
244 | 245 | ||
245 | /** Invalidate TLB Entry. |
246 | /** Invalidate TLB Entry. |
246 | * |
247 | * |
247 | * @param addr Address on a page whose TLB entry is to be invalidated. |
248 | * @param addr Address on a page whose TLB entry is to be invalidated. |
248 | */ |
249 | */ |
249 | static inline void invlpg(__address addr) |
250 | static inline void invlpg(__address addr) |
250 | { |
251 | { |
251 | __asm__ volatile ("invlpg %0\n" :: "m" (*(__native *)addr)); |
252 | __asm__ volatile ("invlpg %0\n" :: "m" (*(__native *)addr)); |
252 | } |
253 | } |
- | 254 | ||
- | 255 | /** Load GDTR register from memory. |
|
- | 256 | * |
|
- | 257 | * @param gdtr_reg Address of memory from where to load GDTR. |
|
- | 258 | */ |
|
- | 259 | static inline void gdtr_load(struct ptr_16_32 *gdtr_reg) |
|
- | 260 | { |
|
- | 261 | __asm__ volatile ("lgdt %0\n" : : "m" (*gdtr_reg)); |
|
- | 262 | } |
|
- | 263 | ||
- | 264 | /** Store GDTR register to memory. |
|
- | 265 | * |
|
- | 266 | * @param gdtr_reg Address of memory to where to load GDTR. |
|
- | 267 | */ |
|
- | 268 | static inline void gdtr_store(struct ptr_16_32 *gdtr_reg) |
|
- | 269 | { |
|
- | 270 | __asm__ volatile ("sgdt %0\n" : : "m" (*gdtr_reg)); |
|
- | 271 | } |
|
- | 272 | ||
- | 273 | /** Load IDTR register from memory. |
|
- | 274 | * |
|
- | 275 | * @param idtr_reg Address of memory from where to load IDTR. |
|
- | 276 | */ |
|
- | 277 | static inline void idtr_load(struct ptr_16_32 *idtr_reg) |
|
- | 278 | { |
|
- | 279 | __asm__ volatile ("lidt %0\n" : : "m" (*idtr_reg)); |
|
- | 280 | } |
|
- | 281 | ||
- | 282 | /** Load TR from descriptor table. |
|
- | 283 | * |
|
- | 284 | * @param sel Selector specifying descriptor of TSS segment. |
|
- | 285 | */ |
|
- | 286 | static inline void tr_load(__u16 sel) |
|
- | 287 | { |
|
- | 288 | __asm__ volatile ("ltr %0" : : "r" (sel)); |
|
- | 289 | } |
|
253 | 290 | ||
254 | #endif |
291 | #endif |
255 | 292 |