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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/x86/boot/boot.h
Initial import
Diffstat (limited to 'arch/x86/boot/boot.h')
-rw-r--r--arch/x86/boot/boot.h359
1 files changed, 359 insertions, 0 deletions
diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
new file mode 100644
index 000000000..bd49ec612
--- /dev/null
+++ b/arch/x86/boot/boot.h
@@ -0,0 +1,359 @@
+/* -*- 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 "ctype.h"
+#include "cpuflags.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;
+
+#define cpu_relax() asm volatile("rep; nop")
+
+/* 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(u16 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_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;
+}
+
+/* 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);
+
+/* 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(unsigned long cmdline_ptr, const char *option, char *buffer, int bufsize);
+int __cmdline_find_option_bool(unsigned long cmdline_ptr, const char *option);
+static inline int cmdline_find_option(const char *option, char *buffer, int bufsize)
+{
+ unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
+
+ if (cmd_line_ptr >= 0x100000)
+ return -1; /* inaccessible */
+
+ return __cmdline_find_option(cmd_line_ptr, option, buffer, bufsize);
+}
+
+static inline int cmdline_find_option_bool(const char *option)
+{
+ unsigned long cmd_line_ptr = boot_params.hdr.cmd_line_ptr;
+
+ if (cmd_line_ptr >= 0x100000)
+ return -1; /* inaccessible */
+
+ return __cmdline_find_option_bool(cmd_line_ptr, option);
+}
+
+/* cpu.c, cpucheck.c */
+int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr);
+int validate_cpu(void);
+
+/* early_serial_console.c */
+extern int early_serial_base;
+void console_init(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);
+int strncmp(const char *cs, const char *ct, size_t count);
+size_t strnlen(const char *s, size_t maxlen);
+unsigned int atou(const char *s);
+unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base);
+size_t strlen(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 */