1 // Basic x86 asm functions and function defs.
3 // Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
5 // This file may be distributed under the terms of the GNU GPLv3 license.
9 #include "ioport.h" // outb
10 #include "biosvar.h" // struct bregs
12 static inline void irq_disable(void)
14 asm volatile("cli": : :"memory");
17 static inline void irq_enable(void)
19 asm volatile("sti": : :"memory");
22 static inline unsigned long irq_save(void)
25 asm volatile("pushfl ; popl %0" : "=g" (flags));
30 static inline void irq_restore(unsigned long flags)
32 asm volatile("pushl %0 ; popfl" : : "g" (flags) : "memory", "cc");
35 static inline void cpu_relax(void)
37 asm volatile("rep ; nop": : :"memory");
40 static inline void nop(void)
45 static inline void hlt(void)
50 static inline void wbinvd(void)
52 asm volatile("wbinvd");
55 void *memset(void *s, int c, size_t n);
56 void *memcpy(void *d1, const void *s1, size_t len);
61 outb(PIC1_IRQ5, PORT_PIC1);
67 outb(PIC2_IRQ13, PORT_PIC2);
71 // Call a function with a specified register state. Note that on
72 // return, the interrupt enable/disable flag may be altered.
74 void call16(struct bregs *callregs)
80 "calll __call16_from32\n"
82 : "+a" (callregs), "+m" (*callregs)
84 : "ebx", "ecx", "edx", "esi", "edi", "ebp", "cc");
88 void __call16_int(struct bregs *callregs, u16 offset)
90 callregs->cs = SEG_BIOS;
91 callregs->ip = offset;
96 #define call16_int(nr, callregs) do { \
97 extern void irq_trampoline_ ##nr (); \
98 __call16_int((callregs), (u32)&irq_trampoline_ ##nr ); \
101 #include "../out/rom16.offset.auto.h"
102 #define call16_int(nr, callregs) \
103 __call16_int((callregs), OFFSET_irq_trampoline_ ##nr )
107 void BX_PANIC(const char *fmt, ...)
108 __attribute__ ((format (printf, 1, 2)))
109 __attribute__ ((noreturn));
110 void printf(const char *fmt, ...)
111 __attribute__ ((format (printf, 1, 2)));
112 void __dprintf(const char *fmt, ...)
113 __attribute__ ((format (printf, 1, 2)));
114 #define dprintf(lvl, fmt, args...) do { \
115 if (CONFIG_DEBUG_LEVEL && (lvl) <= CONFIG_DEBUG_LEVEL) \
116 __dprintf((fmt) , ##args ); \
118 void __debug_enter(const char *fname, struct bregs *regs);
119 void __debug_fail(const char *fname, struct bregs *regs);
120 void __debug_stub(const char *fname, struct bregs *regs);
121 void __debug_isr(const char *fname);
122 #define debug_enter(regs) \
123 __debug_enter(__func__, regs)
124 #define debug_stub(regs) \
125 __debug_stub(__func__, regs)
126 #define debug_isr(regs) \
127 __debug_isr(__func__)
129 // Frequently used return codes
130 #define RET_EUNSUPPORTED 0x86
132 set_success(struct bregs *regs)
138 set_code_success(struct bregs *regs)
145 set_fail_silent(struct bregs *regs)
151 set_code_fail_silent(struct bregs *regs, u8 code)
157 void __set_fail(const char *fname, struct bregs *regs);
158 void __set_code_fail(const char *fname, struct bregs *regs, u8 code);
160 #define set_fail(regs) \
161 __set_fail(__func__, (regs))
162 #define set_code_fail(regs, code) \
163 __set_code_fail(__func__, (regs), (code))
166 void handle_15c2(struct bregs *regs);
174 int usleep(u32 count);
175 void handle_1583(struct bregs *regs);
176 void handle_1586(struct bregs *regs);
179 void VISIBLE16 handle_1553(struct bregs *regs);
182 void handle_1ab1(struct bregs *regs);
185 u8 checksum(u8 *far_data, u32 len);
188 void make_bios_writable();
189 void make_bios_readonly();
192 void rombios32_init(void);
195 void printf_bootdev(u16 bootdev);
198 void interactive_bootmenu();