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