blob: d33f2accb63881452a9aba06ca1f307bee28e905 [file] [log] [blame]
// Basic x86 asm functions and function defs.
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include "ioport.h" // outb
#include "biosvar.h" // struct bregs
static inline void irq_disable(void) {
asm volatile("cli": : :"memory");
}
static inline void irq_enable(void) {
asm volatile("sti": : :"memory");
}
static inline unsigned long irq_save(void)
{
unsigned long flags;
asm volatile("pushfl ; popl %0" : "=g" (flags));
irq_disable();
return flags;
}
static inline void irq_restore(unsigned long flags)
{
asm volatile("pushl %0 ; popfl" : : "g" (flags) : "memory", "cc");
}
static inline void nop(void)
{
asm volatile("nop");
}
#define DEBUGF(fmt, args...)
#define BX_PANIC(fmt, args...)
#define BX_INFO(fmt, args...)
static inline void
memset(void *s, int c, size_t n)
{
while (n)
((char *)s)[--n] = c;
}
static inline void
eoi_master_pic()
{
outb(PIC1_IRQ5, PORT_PIC1);
}
static inline void
eoi_both_pics()
{
outb(PIC2_IRQ13, PORT_PIC2);
eoi_master_pic();
}
static inline
void call16(struct bregs *callregs)
{
asm volatile(
"pushfl\n" // Save flags
"pushal\n" // Save registers
"calll __call16\n"
"popal\n"
"popfl\n"
: : "a" (callregs), "m" (*callregs));
}
// XXX - this is ugly.
#ifdef MODE16
#define call16_int(nr, callregs) do { \
struct bregs *__br = (callregs); \
extern void irq_trampoline_ ##nr (); \
__br->cs = 0xf000; \
__br->ip = (u16)&irq_trampoline_ ##nr; \
call16(__br); \
} while (0)
#else
#include "../out/rom16.offset.auto.h"
#define call16_int(nr, callregs) do { \
struct bregs *__br = (callregs); \
__br->cs = 0xf000; \
__br->ip = OFFSET_irq_trampoline_ ##nr; \
call16(__br); \
} while (0)
#endif
// output.c
void bprintf(u16 action, const char *fmt, ...)
__attribute__ ((format (printf, 2, 3)));
struct bregs;
void __debug_enter(const char *fname, struct bregs *regs);
void __debug_exit(const char *fname, struct bregs *regs);
#define debug_enter(regs) \
__debug_enter(__func__, regs)
#define debug_exit(regs) \
__debug_exit(__func__, regs)
#define printf(fmt, args...) \
bprintf(1, fmt , ##args )
// kbd.c
void handle_15c2(struct bregs *regs);