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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 __u8 inb(int port); |
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| 42 | extern __u16 inw(int port); |
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| 43 | extern __u32 inl(int port); |
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| 44 | |||
| 45 | extern void enable_l_apic_in_msr(void); |
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| 46 | |||
| 195 | vana | 47 | |
| 48 | void asm_delay_loop(__u32 t); |
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| 49 | void asm_fake_loop(__u32 t); |
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| 50 | |||
| 51 | |||
| 115 | jermar | 52 | /** Halt CPU |
| 53 | * |
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| 54 | * Halt the current CPU until interrupt event. |
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| 55 | */ |
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| 348 | jermar | 56 | static inline void cpu_halt(void) { __asm__("hlt\n"); }; |
| 57 | static inline void cpu_sleep(void) { __asm__("hlt\n"); }; |
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| 1 | jermar | 58 | |
| 115 | jermar | 59 | /** Read CR2 |
| 60 | * |
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| 61 | * Return value in CR2 |
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| 62 | * |
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| 63 | * @return Value read. |
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| 64 | */ |
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| 348 | jermar | 65 | static inline __u32 read_cr2(void) { __u32 v; __asm__ volatile ("movl %%cr2,%0\n" : "=r" (v)); return v; } |
| 27 | jermar | 66 | |
| 115 | jermar | 67 | /** Write CR3 |
| 68 | * |
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| 69 | * Write value to CR3. |
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| 70 | * |
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| 71 | * @param v Value to be written. |
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| 72 | */ |
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| 73 | static inline void write_cr3(__u32 v) { __asm__ volatile ("movl %0,%%cr3\n" : : "r" (v)); } |
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| 38 | jermar | 74 | |
| 115 | jermar | 75 | /** Read CR3 |
| 76 | * |
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| 77 | * Return value in CR3 |
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| 78 | * |
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| 79 | * @return Value read. |
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| 80 | */ |
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| 348 | jermar | 81 | static inline __u32 read_cr3(void) { __u32 v; __asm__ volatile ("movl %%cr3,%0\n" : "=r" (v)); return v; } |
| 115 | jermar | 82 | |
| 352 | bondari | 83 | /** Byte to port |
| 84 | * |
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| 85 | * Output byte to port |
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| 86 | * |
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| 87 | * @param port Port to write to |
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| 88 | * @param val Value to write |
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| 89 | */ |
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| 90 | static inline void outb(__u16 port, __u8 val) { __asm__ volatile ("outb %b0, %w1\n" : : "a" (val), "d" (port) ); } |
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| 91 | |||
| 353 | bondari | 92 | /** Word to port |
| 93 | * |
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| 94 | * Output word to port |
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| 95 | * |
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| 96 | * @param port Port to write to |
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| 97 | * @param val Value to write |
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| 98 | */ |
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| 99 | static inline void outw(__u16 port, __u16 val) { __asm__ volatile ("outw %w0, %w1\n" : : "a" (val), "d" (port) ); } |
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| 352 | bondari | 100 | |
| 353 | bondari | 101 | |
| 102 | |||
| 103 | /** Double word to port |
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| 104 | * |
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| 105 | * Output double word to port |
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| 106 | * |
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| 107 | * @param port Port to write to |
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| 108 | * @param val Value to write |
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| 109 | */ |
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| 110 | static inline void outl(__u16 port, __u32 val) { __asm__ volatile ("outl %l0, %w1\n" : : "a" (val), "d" (port) ); } |
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| 111 | |||
| 115 | jermar | 112 | /** Set priority level low |
| 113 | * |
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| 114 | * Enable interrupts and return previous |
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| 115 | * value of EFLAGS. |
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| 116 | */ |
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| 117 | static inline pri_t cpu_priority_low(void) { |
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| 118 | pri_t v; |
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| 119 | __asm__ volatile ( |
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| 120 | "pushf\n" |
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| 121 | "popl %0\n" |
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| 122 | "sti\n" |
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| 123 | : "=r" (v) |
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| 124 | ); |
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| 125 | return v; |
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| 126 | } |
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| 127 | |||
| 128 | /** Set priority level high |
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| 129 | * |
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| 130 | * Disable interrupts and return previous |
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| 131 | * value of EFLAGS. |
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| 132 | */ |
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| 133 | static inline pri_t cpu_priority_high(void) { |
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| 134 | pri_t v; |
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| 135 | __asm__ volatile ( |
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| 136 | "pushf\n" |
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| 137 | "popl %0\n" |
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| 138 | "cli\n" |
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| 139 | : "=r" (v) |
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| 140 | ); |
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| 141 | return v; |
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| 142 | } |
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| 143 | |||
| 144 | /** Restore priority level |
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| 145 | * |
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| 146 | * Restore EFLAGS. |
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| 147 | */ |
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| 148 | static inline void cpu_priority_restore(pri_t pri) { |
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| 149 | __asm__ volatile ( |
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| 150 | "pushl %0\n" |
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| 151 | "popf\n" |
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| 152 | : : "r" (pri) |
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| 153 | ); |
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| 154 | } |
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| 155 | |||
| 156 | /** Return raw priority level |
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| 157 | * |
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| 158 | * Return EFLAFS. |
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| 159 | */ |
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| 160 | static inline pri_t cpu_priority_read(void) { |
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| 161 | pri_t v; |
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| 162 | __asm__ volatile ( |
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| 163 | "pushf\n" |
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| 164 | "popl %0\n" |
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| 165 | : "=r" (v) |
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| 166 | ); |
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| 167 | return v; |
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| 168 | } |
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| 169 | |||
| 173 | jermar | 170 | /** Return base address of current stack |
| 171 | * |
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| 172 | * Return the base address of the current stack. |
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| 173 | * The stack is assumed to be STACK_SIZE bytes long. |
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| 180 | jermar | 174 | * The stack must start on page boundary. |
| 173 | jermar | 175 | */ |
| 176 | static inline __address get_stack_base(void) |
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| 177 | { |
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| 178 | __address v; |
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| 179 | |||
| 180 | __asm__ volatile ("andl %%esp, %0\n" : "=r" (v) : "0" (~(STACK_SIZE-1))); |
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| 181 | |||
| 182 | return v; |
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| 183 | } |
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| 184 | |||
| 348 | jermar | 185 | static inline __u64 rdtsc(void) |
| 186 | { |
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| 187 | __u64 v; |
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| 188 | |||
| 189 | __asm__ volatile("rdtsc\n" : "=A" (v)); |
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| 190 | |||
| 191 | return v; |
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| 192 | } |
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| 193 | |||
| 352 | bondari | 194 | |
| 1 | jermar | 195 | #endif |