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);
57 void *memmove(void *d, const void *s, size_t len);
59 // Call a function with a specified register state. Note that on
60 // return, the interrupt enable/disable flag may be altered.
62 void call16(struct bregs *callregs)
68 "calll __call16_from32\n"
70 : "+a" (callregs), "+m" (*callregs)
72 : "ebx", "ecx", "edx", "esi", "edi", "ebp", "cc");
76 void __call16_int(struct bregs *callregs, u16 offset)
78 callregs->cs = SEG_BIOS;
79 callregs->ip = offset;
84 #define call16_int(nr, callregs) do { \
85 extern void irq_trampoline_ ##nr (); \
86 __call16_int((callregs), (u32)&irq_trampoline_ ##nr ); \
89 #include "../out/rom16.offset.auto.h"
90 #define call16_int(nr, callregs) \
91 __call16_int((callregs), OFFSET_irq_trampoline_ ##nr )
95 void debug_serial_setup();
96 void BX_PANIC(const char *fmt, ...)
97 __attribute__ ((format (printf, 1, 2)))
98 __attribute__ ((noreturn));
99 void printf(const char *fmt, ...)
100 __attribute__ ((format (printf, 1, 2)));
101 void __dprintf(const char *fmt, ...)
102 __attribute__ ((format (printf, 1, 2)));
103 #define dprintf(lvl, fmt, args...) do { \
104 if (CONFIG_DEBUG_LEVEL && (lvl) <= CONFIG_DEBUG_LEVEL) \
105 __dprintf((fmt) , ##args ); \
107 void __debug_enter(const char *fname, struct bregs *regs);
108 void __debug_fail(const char *fname, struct bregs *regs);
109 void __debug_stub(const char *fname, struct bregs *regs);
110 void __debug_isr(const char *fname);
111 #define debug_enter(regs, lvl) do { \
112 if ((lvl) && (lvl) <= CONFIG_DEBUG_LEVEL) \
113 __debug_enter(__func__, regs); \
115 #define debug_isr(lvl) do { \
116 if ((lvl) && (lvl) <= CONFIG_DEBUG_LEVEL) \
117 __debug_isr(__func__); \
119 #define debug_stub(regs) \
120 __debug_stub(__func__, regs)
122 // Frequently used return codes
123 #define RET_EUNSUPPORTED 0x86
125 set_success(struct bregs *regs)
131 set_code_success(struct bregs *regs)
138 set_fail_silent(struct bregs *regs)
144 set_code_fail_silent(struct bregs *regs, u8 code)
150 void __set_fail(const char *fname, struct bregs *regs);
151 void __set_code_fail(const char *fname, struct bregs *regs, u8 code);
153 #define set_fail(regs) \
154 __set_fail(__func__, (regs))
155 #define set_code_fail(regs, code) \
156 __set_code_fail(__func__, (regs), (code))
159 void handle_15c2(struct bregs *regs);
173 int usleep(u32 count);
174 void handle_1583(struct bregs *regs);
175 void handle_1586(struct bregs *regs);
178 void VISIBLE16 handle_1553(struct bregs *regs);
181 void handle_1ab1(struct bregs *regs);
184 u8 checksum(u8 *far_data, u32 len);
187 void make_bios_writable();
188 void make_bios_readonly();
191 void rombios32_init(void);
194 void printf_bootdev(u16 bootdev);
197 void interactive_bootmenu();
200 void coreboot_fill_map();