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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
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| 393 | bondari | 3 | * Copyright (C) 2005 Sergey Bondari |
| 1 | jermar | 4 | * All rights reserved. |
| 5 | * |
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| 6 | * Redistribution and use in source and binary forms, with or without |
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| 7 | * modification, are permitted provided that the following conditions |
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| 8 | * are met: |
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| 9 | * |
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| 10 | * - Redistributions of source code must retain the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer. |
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| 12 | * - Redistributions in binary form must reproduce the above copyright |
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| 13 | * notice, this list of conditions and the following disclaimer in the |
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| 14 | * documentation and/or other materials provided with the distribution. |
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| 15 | * - The name of the author may not be used to endorse or promote products |
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| 16 | * derived from this software without specific prior written permission. |
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| 17 | * |
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 28 | */ |
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| 29 | |||
| 11 | jermar | 30 | #ifndef __ia32_ASM_H__ |
| 31 | #define __ia32_ASM_H__ |
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| 1 | jermar | 32 | |
| 33 | #include <arch/types.h> |
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| 177 | jermar | 34 | #include <config.h> |
| 1 | jermar | 35 | |
| 36 | extern __u32 interrupt_handler_size; |
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| 37 | |||
| 38 | extern void paging_on(void); |
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| 39 | |||
| 40 | extern void interrupt_handlers(void); |
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| 41 | |||
| 42 | extern void enable_l_apic_in_msr(void); |
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| 43 | |||
| 195 | vana | 44 | |
| 45 | void asm_delay_loop(__u32 t); |
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| 46 | void asm_fake_loop(__u32 t); |
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| 47 | |||
| 48 | |||
| 115 | jermar | 49 | /** Halt CPU |
| 50 | * |
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| 51 | * Halt the current CPU until interrupt event. |
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| 52 | */ |
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| 348 | jermar | 53 | static inline void cpu_halt(void) { __asm__("hlt\n"); }; |
| 54 | static inline void cpu_sleep(void) { __asm__("hlt\n"); }; |
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| 1 | jermar | 55 | |
| 115 | jermar | 56 | /** Read CR2 |
| 57 | * |
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| 58 | * Return value in CR2 |
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| 59 | * |
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| 60 | * @return Value read. |
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| 61 | */ |
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| 348 | jermar | 62 | static inline __u32 read_cr2(void) { __u32 v; __asm__ volatile ("movl %%cr2,%0\n" : "=r" (v)); return v; } |
| 27 | jermar | 63 | |
| 115 | jermar | 64 | /** Write CR3 |
| 65 | * |
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| 66 | * Write value to CR3. |
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| 67 | * |
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| 68 | * @param v Value to be written. |
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| 69 | */ |
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| 70 | static inline void write_cr3(__u32 v) { __asm__ volatile ("movl %0,%%cr3\n" : : "r" (v)); } |
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| 38 | jermar | 71 | |
| 115 | jermar | 72 | /** Read CR3 |
| 73 | * |
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| 74 | * Return value in CR3 |
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| 75 | * |
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| 76 | * @return Value read. |
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| 77 | */ |
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| 348 | jermar | 78 | static inline __u32 read_cr3(void) { __u32 v; __asm__ volatile ("movl %%cr3,%0\n" : "=r" (v)); return v; } |
| 115 | jermar | 79 | |
| 352 | bondari | 80 | /** Byte to port |
| 81 | * |
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| 82 | * Output byte to port |
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| 83 | * |
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| 84 | * @param port Port to write to |
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| 85 | * @param val Value to write |
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| 86 | */ |
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| 87 | static inline void outb(__u16 port, __u8 val) { __asm__ volatile ("outb %b0, %w1\n" : : "a" (val), "d" (port) ); } |
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| 88 | |||
| 353 | bondari | 89 | /** Word to port |
| 90 | * |
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| 91 | * Output word to port |
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| 92 | * |
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| 93 | * @param port Port to write to |
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| 94 | * @param val Value to write |
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| 95 | */ |
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| 96 | static inline void outw(__u16 port, __u16 val) { __asm__ volatile ("outw %w0, %w1\n" : : "a" (val), "d" (port) ); } |
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| 352 | bondari | 97 | |
| 353 | bondari | 98 | /** Double word to port |
| 99 | * |
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| 100 | * Output double word to port |
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| 101 | * |
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| 102 | * @param port Port to write to |
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| 103 | * @param val Value to write |
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| 104 | */ |
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| 105 | static inline void outl(__u16 port, __u32 val) { __asm__ volatile ("outl %l0, %w1\n" : : "a" (val), "d" (port) ); } |
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| 106 | |||
| 356 | bondari | 107 | /** Byte from port |
| 108 | * |
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| 109 | * Get byte from port |
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| 110 | * |
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| 111 | * @param port Port to read from |
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| 112 | * @return Value read |
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| 113 | */ |
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| 114 | static inline __u8 inb(__u16 port) { __u8 val; __asm__ volatile ("inb %w1, %b0 \n" : "=a" (val) : "d" (port) ); return val; } |
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| 115 | |||
| 116 | /** Word from port |
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| 117 | * |
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| 118 | * Get word from port |
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| 119 | * |
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| 120 | * @param port Port to read from |
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| 121 | * @return Value read |
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| 122 | */ |
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| 123 | static inline __u16 inw(__u16 port) { __u16 val; __asm__ volatile ("inw %w1, %w0 \n" : "=a" (val) : "d" (port) ); return val; } |
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| 124 | |||
| 125 | /** Double word from port |
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| 126 | * |
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| 127 | * Get double word from port |
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| 128 | * |
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| 129 | * @param port Port to read from |
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| 130 | * @return Value read |
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| 131 | */ |
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| 132 | static inline __u32 inl(__u16 port) { __u32 val; __asm__ volatile ("inl %w1, %l0 \n" : "=a" (val) : "d" (port) ); return val; } |
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| 133 | |||
| 115 | jermar | 134 | /** Set priority level low |
| 135 | * |
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| 136 | * Enable interrupts and return previous |
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| 137 | * value of EFLAGS. |
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| 138 | */ |
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| 139 | static inline pri_t cpu_priority_low(void) { |
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| 140 | pri_t v; |
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| 141 | __asm__ volatile ( |
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| 358 | bondari | 142 | "pushf\n\t" |
| 143 | "popl %0\n\t" |
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| 115 | jermar | 144 | "sti\n" |
| 145 | : "=r" (v) |
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| 146 | ); |
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| 147 | return v; |
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| 148 | } |
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| 149 | |||
| 150 | /** Set priority level high |
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| 151 | * |
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| 152 | * Disable interrupts and return previous |
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| 153 | * value of EFLAGS. |
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| 154 | */ |
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| 155 | static inline pri_t cpu_priority_high(void) { |
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| 156 | pri_t v; |
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| 157 | __asm__ volatile ( |
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| 358 | bondari | 158 | "pushf\n\t" |
| 159 | "popl %0\n\t" |
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| 115 | jermar | 160 | "cli\n" |
| 161 | : "=r" (v) |
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| 162 | ); |
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| 163 | return v; |
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| 164 | } |
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| 165 | |||
| 166 | /** Restore priority level |
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| 167 | * |
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| 168 | * Restore EFLAGS. |
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| 169 | */ |
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| 170 | static inline void cpu_priority_restore(pri_t pri) { |
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| 171 | __asm__ volatile ( |
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| 358 | bondari | 172 | "pushl %0\n\t" |
| 115 | jermar | 173 | "popf\n" |
| 174 | : : "r" (pri) |
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| 175 | ); |
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| 176 | } |
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| 177 | |||
| 178 | /** Return raw priority level |
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| 179 | * |
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| 180 | * Return EFLAFS. |
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| 181 | */ |
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| 182 | static inline pri_t cpu_priority_read(void) { |
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| 183 | pri_t v; |
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| 184 | __asm__ volatile ( |
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| 358 | bondari | 185 | "pushf\n\t" |
| 115 | jermar | 186 | "popl %0\n" |
| 187 | : "=r" (v) |
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| 188 | ); |
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| 189 | return v; |
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| 190 | } |
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| 191 | |||
| 173 | jermar | 192 | /** Return base address of current stack |
| 193 | * |
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| 194 | * Return the base address of the current stack. |
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| 195 | * The stack is assumed to be STACK_SIZE bytes long. |
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| 180 | jermar | 196 | * The stack must start on page boundary. |
| 173 | jermar | 197 | */ |
| 198 | static inline __address get_stack_base(void) |
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| 199 | { |
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| 200 | __address v; |
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| 201 | |||
| 202 | __asm__ volatile ("andl %%esp, %0\n" : "=r" (v) : "0" (~(STACK_SIZE-1))); |
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| 203 | |||
| 204 | return v; |
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| 205 | } |
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| 206 | |||
| 348 | jermar | 207 | static inline __u64 rdtsc(void) |
| 208 | { |
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| 209 | __u64 v; |
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| 210 | |||
| 211 | __asm__ volatile("rdtsc\n" : "=A" (v)); |
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| 212 | |||
| 213 | return v; |
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| 214 | } |
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| 215 | |||
| 1 | jermar | 216 | #endif |