You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
355 lines
7.5 KiB
355 lines
7.5 KiB
/* -*- linux-c -*- ------------------------------------------------------- *
|
|
*
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
|
* Copyright 2007 rPath, Inc. - All Rights Reserved
|
|
* Copyright 2009 Intel Corporation; author H. Peter Anvin
|
|
*
|
|
* This file is part of the Linux kernel, and is made available under
|
|
* the terms of the GNU General Public License version 2.
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Header file for the real-mode kernel code
|
|
*/
|
|
|
|
#ifndef BOOT_BOOT_H
|
|
#define BOOT_BOOT_H
|
|
|
|
#define STACK_SIZE 512 /* Minimum number of bytes for stack */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <stdarg.h>
|
|
#include <linux/types.h>
|
|
#include <linux/edd.h>
|
|
#include <asm/boot.h>
|
|
#include <asm/setup.h>
|
|
#include "bitops.h"
|
|
#include <asm/cpufeature.h>
|
|
#include <asm/processor-flags.h>
|
|
|
|
/* Useful macros */
|
|
#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
|
|
|
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
|
|
|
|
extern struct setup_header hdr;
|
|
extern struct boot_params boot_params;
|
|
|
|
/* Basic port I/O */
|
|
static inline void outb(u8 v, u16 port)
|
|
{
|
|
asm volatile("outb %0,%1" : : "a" (v), "dN" (port));
|
|
}
|
|
static inline u8 inb(u16 port)
|
|
{
|
|
u8 v;
|
|
asm volatile("inb %1,%0" : "=a" (v) : "dN" (port));
|
|
return v;
|
|
}
|
|
|
|
static inline void outw(u16 v, u16 port)
|
|
{
|
|
asm volatile("outw %0,%1" : : "a" (v), "dN" (port));
|
|
}
|
|
static inline u16 inw(u16 port)
|
|
{
|
|
u16 v;
|
|
asm volatile("inw %1,%0" : "=a" (v) : "dN" (port));
|
|
return v;
|
|
}
|
|
|
|
static inline void outl(u32 v, u16 port)
|
|
{
|
|
asm volatile("outl %0,%1" : : "a" (v), "dN" (port));
|
|
}
|
|
static inline u32 inl(u32 port)
|
|
{
|
|
u32 v;
|
|
asm volatile("inl %1,%0" : "=a" (v) : "dN" (port));
|
|
return v;
|
|
}
|
|
|
|
static inline void io_delay(void)
|
|
{
|
|
const u16 DELAY_PORT = 0x80;
|
|
asm volatile("outb %%al,%0" : : "dN" (DELAY_PORT));
|
|
}
|
|
|
|
/* These functions are used to reference data in other segments. */
|
|
|
|
static inline u16 ds(void)
|
|
{
|
|
u16 seg;
|
|
asm("movw %%ds,%0" : "=rm" (seg));
|
|
return seg;
|
|
}
|
|
|
|
static inline void set_fs(u16 seg)
|
|
{
|
|
asm volatile("movw %0,%%fs" : : "rm" (seg));
|
|
}
|
|
static inline u16 fs(void)
|
|
{
|
|
u16 seg;
|
|
asm volatile("movw %%fs,%0" : "=rm" (seg));
|
|
return seg;
|
|
}
|
|
|
|
static inline void set_gs(u16 seg)
|
|
{
|
|
asm volatile("movw %0,%%gs" : : "rm" (seg));
|
|
}
|
|
static inline u16 gs(void)
|
|
{
|
|
u16 seg;
|
|
asm volatile("movw %%gs,%0" : "=rm" (seg));
|
|
return seg;
|
|
}
|
|
|
|
typedef unsigned int addr_t;
|
|
|
|
static inline u8 rdfs8(addr_t addr)
|
|
{
|
|
u8 v;
|
|
asm volatile("movb %%fs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr));
|
|
return v;
|
|
}
|
|
static inline u16 rdfs16(addr_t addr)
|
|
{
|
|
u16 v;
|
|
asm volatile("movw %%fs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
|
|
return v;
|
|
}
|
|
static inline u32 rdfs32(addr_t addr)
|
|
{
|
|
u32 v;
|
|
asm volatile("movl %%fs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
|
|
return v;
|
|
}
|
|
|
|
static inline void wrfs8(u8 v, addr_t addr)
|
|
{
|
|
asm volatile("movb %1,%%fs:%0" : "+m" (*(u8 *)addr) : "qi" (v));
|
|
}
|
|
static inline void wrfs16(u16 v, addr_t addr)
|
|
{
|
|
asm volatile("movw %1,%%fs:%0" : "+m" (*(u16 *)addr) : "ri" (v));
|
|
}
|
|
static inline void wrfs32(u32 v, addr_t addr)
|
|
{
|
|
asm volatile("movl %1,%%fs:%0" : "+m" (*(u32 *)addr) : "ri" (v));
|
|
}
|
|
|
|
static inline u8 rdgs8(addr_t addr)
|
|
{
|
|
u8 v;
|
|
asm volatile("movb %%gs:%1,%0" : "=q" (v) : "m" (*(u8 *)addr));
|
|
return v;
|
|
}
|
|
static inline u16 rdgs16(addr_t addr)
|
|
{
|
|
u16 v;
|
|
asm volatile("movw %%gs:%1,%0" : "=r" (v) : "m" (*(u16 *)addr));
|
|
return v;
|
|
}
|
|
static inline u32 rdgs32(addr_t addr)
|
|
{
|
|
u32 v;
|
|
asm volatile("movl %%gs:%1,%0" : "=r" (v) : "m" (*(u32 *)addr));
|
|
return v;
|
|
}
|
|
|
|
static inline void wrgs8(u8 v, addr_t addr)
|
|
{
|
|
asm volatile("movb %1,%%gs:%0" : "+m" (*(u8 *)addr) : "qi" (v));
|
|
}
|
|
static inline void wrgs16(u16 v, addr_t addr)
|
|
{
|
|
asm volatile("movw %1,%%gs:%0" : "+m" (*(u16 *)addr) : "ri" (v));
|
|
}
|
|
static inline void wrgs32(u32 v, addr_t addr)
|
|
{
|
|
asm volatile("movl %1,%%gs:%0" : "+m" (*(u32 *)addr) : "ri" (v));
|
|
}
|
|
|
|
/* Note: these only return true/false, not a signed return value! */
|
|
static inline int memcmp(const void *s1, const void *s2, size_t len)
|
|
{
|
|
u8 diff;
|
|
asm("repe; cmpsb; setnz %0"
|
|
: "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
|
|
return diff;
|
|
}
|
|
|
|
static inline int memcmp_fs(const void *s1, addr_t s2, size_t len)
|
|
{
|
|
u8 diff;
|
|
asm volatile("fs; repe; cmpsb; setnz %0"
|
|
: "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
|
|
return diff;
|
|
}
|
|
static inline int memcmp_gs(const void *s1, addr_t s2, size_t len)
|
|
{
|
|
u8 diff;
|
|
asm volatile("gs; repe; cmpsb; setnz %0"
|
|
: "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
|
|
return diff;
|
|
}
|
|
|
|
static inline int isdigit(int ch)
|
|
{
|
|
return (ch >= '0') && (ch <= '9');
|
|
}
|
|
|
|
/* Heap -- available for dynamic lists. */
|
|
extern char _end[];
|
|
extern char *HEAP;
|
|
extern char *heap_end;
|
|
#define RESET_HEAP() ((void *)( HEAP = _end ))
|
|
static inline char *__get_heap(size_t s, size_t a, size_t n)
|
|
{
|
|
char *tmp;
|
|
|
|
HEAP = (char *)(((size_t)HEAP+(a-1)) & ~(a-1));
|
|
tmp = HEAP;
|
|
HEAP += s*n;
|
|
return tmp;
|
|
}
|
|
#define GET_HEAP(type, n) \
|
|
((type *)__get_heap(sizeof(type),__alignof__(type),(n)))
|
|
|
|
static inline bool heap_free(size_t n)
|
|
{
|
|
return (int)(heap_end-HEAP) >= (int)n;
|
|
}
|
|
|
|
/* copy.S */
|
|
|
|
void copy_to_fs(addr_t dst, void *src, size_t len);
|
|
void *copy_from_fs(void *dst, addr_t src, size_t len);
|
|
void copy_to_gs(addr_t dst, void *src, size_t len);
|
|
void *copy_from_gs(void *dst, addr_t src, size_t len);
|
|
void *memcpy(void *dst, void *src, size_t len);
|
|
void *memset(void *dst, int c, size_t len);
|
|
|
|
#define memcpy(d,s,l) __builtin_memcpy(d,s,l)
|
|
#define memset(d,c,l) __builtin_memset(d,c,l)
|
|
|
|
/* a20.c */
|
|
int enable_a20(void);
|
|
|
|
/* apm.c */
|
|
int query_apm_bios(void);
|
|
|
|
/* bioscall.c */
|
|
struct biosregs {
|
|
union {
|
|
struct {
|
|
u32 edi;
|
|
u32 esi;
|
|
u32 ebp;
|
|
u32 _esp;
|
|
u32 ebx;
|
|
u32 edx;
|
|
u32 ecx;
|
|
u32 eax;
|
|
u32 _fsgs;
|
|
u32 _dses;
|
|
u32 eflags;
|
|
};
|
|
struct {
|
|
u16 di, hdi;
|
|
u16 si, hsi;
|
|
u16 bp, hbp;
|
|
u16 _sp, _hsp;
|
|
u16 bx, hbx;
|
|
u16 dx, hdx;
|
|
u16 cx, hcx;
|
|
u16 ax, hax;
|
|
u16 gs, fs;
|
|
u16 es, ds;
|
|
u16 flags, hflags;
|
|
};
|
|
struct {
|
|
u8 dil, dih, edi2, edi3;
|
|
u8 sil, sih, esi2, esi3;
|
|
u8 bpl, bph, ebp2, ebp3;
|
|
u8 _spl, _sph, _esp2, _esp3;
|
|
u8 bl, bh, ebx2, ebx3;
|
|
u8 dl, dh, edx2, edx3;
|
|
u8 cl, ch, ecx2, ecx3;
|
|
u8 al, ah, eax2, eax3;
|
|
};
|
|
};
|
|
};
|
|
void intcall(u8 int_no, const struct biosregs *ireg, struct biosregs *oreg);
|
|
|
|
/* cmdline.c */
|
|
int cmdline_find_option(const char *option, char *buffer, int bufsize);
|
|
int cmdline_find_option_bool(const char *option);
|
|
|
|
/* cpu.c, cpucheck.c */
|
|
struct cpu_features {
|
|
int level; /* Family, or 64 for x86-64 */
|
|
int model;
|
|
u32 flags[NCAPINTS];
|
|
};
|
|
extern struct cpu_features cpu;
|
|
int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr);
|
|
int validate_cpu(void);
|
|
|
|
/* edd.c */
|
|
void query_edd(void);
|
|
|
|
/* header.S */
|
|
void __attribute__((noreturn)) die(void);
|
|
|
|
/* mca.c */
|
|
int query_mca(void);
|
|
|
|
/* memory.c */
|
|
int detect_memory(void);
|
|
|
|
/* pm.c */
|
|
void __attribute__((noreturn)) go_to_protected_mode(void);
|
|
|
|
/* pmjump.S */
|
|
void __attribute__((noreturn))
|
|
protected_mode_jump(u32 entrypoint, u32 bootparams);
|
|
|
|
/* printf.c */
|
|
int sprintf(char *buf, const char *fmt, ...);
|
|
int vsprintf(char *buf, const char *fmt, va_list args);
|
|
int printf(const char *fmt, ...);
|
|
|
|
/* regs.c */
|
|
void initregs(struct biosregs *regs);
|
|
|
|
/* string.c */
|
|
int strcmp(const char *str1, const char *str2);
|
|
size_t strnlen(const char *s, size_t maxlen);
|
|
unsigned int atou(const char *s);
|
|
|
|
/* tty.c */
|
|
void puts(const char *);
|
|
void putchar(int);
|
|
int getchar(void);
|
|
void kbd_flush(void);
|
|
int getchar_timeout(void);
|
|
|
|
/* video.c */
|
|
void set_video(void);
|
|
|
|
/* video-mode.c */
|
|
int set_mode(u16 mode);
|
|
int mode_defined(u16 mode);
|
|
void probe_cards(int unsafe);
|
|
|
|
/* video-vesa.c */
|
|
void vesa_store_edid(void);
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* BOOT_BOOT_H */
|
|
|