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 nop(void)
40 #define DEBUGF(fmt, args...)
41 #define BX_PANIC(fmt, args...)
42 #define BX_INFO(fmt, args...) bprintf(0, fmt , ##args)
45 memset(void *s, int c, size_t n)
54 outb(PIC1_IRQ5, PORT_PIC1);
60 outb(PIC2_IRQ13, PORT_PIC2);
65 void call16(struct bregs *callregs)
68 "pushfl\n" // Save flags
69 "pushal\n" // Save registers
73 "calll __call16_from32\n"
77 : : "a" (callregs), "m" (*callregs));
81 void __call16_int(struct bregs *callregs, u16 offset)
83 callregs->cs = 0xf000;
84 callregs->ip = offset;
89 #define call16_int(nr, callregs) do { \
90 extern void irq_trampoline_ ##nr (); \
91 __call16_int((callregs), (u16)&irq_trampoline_ ##nr ); \
94 #include "../out/rom16.offset.auto.h"
95 #define call16_int(nr, callregs) \
96 __call16_int((callregs), OFFSET_irq_trampoline_ ##nr )
100 void bprintf(u16 action, const char *fmt, ...)
101 __attribute__ ((format (printf, 2, 3)));
102 void __debug_enter(const char *fname, struct bregs *regs);
103 void __debug_exit(const char *fname, struct bregs *regs);
104 void __debug_stub(const char *fname, struct bregs *regs);
105 #define debug_enter(regs) \
106 __debug_enter(__func__, regs)
107 #define debug_exit(regs) \
108 __debug_exit(__func__, regs)
109 #define debug_stub(regs) \
110 __debug_stub(__func__, regs)
111 #define printf(fmt, args...) \
112 bprintf(1, fmt , ##args )
115 void handle_15c2(struct bregs *regs);
118 void handle_1583(struct bregs *regs);
120 // Frequent bios return helper
121 #define RET_EUNSUPPORTED 0x86
123 handle_ret(struct bregs *regs, u8 code)