1 // Basic x86 asm functions and function defs.
3 // Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net>
5 // This file may be distributed under the terms of the GNU LGPLv3 license.
9 #include "types.h" // u32
11 static inline void irq_disable(void)
13 asm volatile("cli": : :"memory");
16 static inline void irq_enable(void)
18 asm volatile("sti": : :"memory");
21 static inline unsigned long irq_save(void)
24 asm volatile("pushfl ; popl %0" : "=g" (flags));
29 static inline void irq_restore(unsigned long flags)
31 asm volatile("pushl %0 ; popfl" : : "g" (flags) : "memory", "cc");
34 static inline void cpu_relax(void)
36 asm volatile("rep ; nop": : :"memory");
39 // Atomically enable irqs and sleep until an irq; then re-disable irqs.
40 static inline void wait_irq(void)
42 asm volatile("sti ; hlt ; cli ; cld": : :"memory");
45 static inline void nop(void)
50 static inline void hlt(void)
55 static inline void wbinvd(void)
57 asm volatile("wbinvd");
60 #define CPUID_MSR (1 << 5)
61 #define CPUID_APIC (1 << 9)
62 #define CPUID_MTRR (1 << 12)
63 static inline void cpuid(u32 index, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx)
66 : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
70 static inline u64 rdmsr(u32 index)
73 asm ("rdmsr" : "=A"(ret) : "c"(index));
77 static inline void wrmsr(u32 index, u64 val)
79 asm volatile ("wrmsr" : : "c"(index), "A"(val));
82 static inline u64 rdtscll(void)
85 asm volatile("rdtsc" : "=A" (val));
89 static inline u32 __ffs(u32 word)
97 static inline void writel(void *addr, u32 val) {
98 *(volatile u32 *)addr = val;
100 static inline void writew(void *addr, u16 val) {
101 *(volatile u16 *)addr = val;
103 static inline void writeb(void *addr, u8 val) {
104 *(volatile u8 *)addr = val;
106 static inline u32 readl(const void *addr) {
107 return *(volatile const u32 *)addr;
109 static inline u16 readw(const void *addr) {
110 return *(volatile const u16 *)addr;
112 static inline u8 readb(const void *addr) {
113 return *(volatile const u8 *)addr;
116 // GDT bit manipulation
117 #define GDT_BASE(v) ((((u64)(v) & 0xff000000) << 32) \
118 | (((u64)(v) & 0x00ffffff) << 16))
119 #define GDT_LIMIT(v) ((((u64)(v) & 0x000f0000) << 32) \
120 | (((u64)(v) & 0x0000ffff) << 0))
121 #define GDT_CODE (0x9bULL << 40) // Code segment - P,R,A bits also set
122 #define GDT_DATA (0x93ULL << 40) // Data segment - W,A bits also set
123 #define GDT_B (0x1ULL << 54) // Big flag
124 #define GDT_G (0x1ULL << 55) // Granularity flag
126 #define call16_simpint(nr, peax, pflags) do { \
135 : "+a"(*peax), "=r"(*pflags) \
141 inline u32 stack_hop(u32 eax, u32 edx, u32 ecx, void *func);
142 extern struct thread_info MainThread;
143 struct thread_info *getCurThread();
144 void run_thread(void (*func)(void*), void *data);
146 u8 checksum_far(u16 buf_seg, void *buf_far, u32 len);
147 u8 checksum(void *buf, u32 len);
148 int memcmp(const void *s1, const void *s2, size_t n);
149 size_t strlen(const char *s);
150 int strcmp(const char *s1, const char *s2);
151 inline void memset_far(u16 d_seg, void *d_far, u8 c, size_t len);
152 inline void memset16_far(u16 d_seg, void *d_far, u16 c, size_t len);
153 void *memset(void *s, int c, size_t n);
154 void *memcpy(void *d1, const void *s1, size_t len);
156 #define memcpy __builtin_memcpy
158 inline void memcpy_far(u16 d_seg, void *d_far
159 , u16 s_seg, const void *s_far, size_t len);
160 void *memmove(void *d, const void *s, size_t len);
161 char *strtcpy(char *dest, const char *src, size_t len);
163 inline void call16(struct bregs *callregs);
164 inline void call16big(struct bregs *callregs);
165 inline void __call16_int(struct bregs *callregs, u16 offset);
166 #define call16_int(nr, callregs) do { \
167 extern void irq_trampoline_ ##nr (); \
168 __call16_int((callregs), (u32)&irq_trampoline_ ##nr ); \
171 void biosusleep(u32 usec);
172 int get_keystroke(int msec);
175 void debug_serial_setup();
176 void panic(const char *fmt, ...)
177 __attribute__ ((format (printf, 1, 2)))
178 __attribute__ ((noreturn));
179 void printf(const char *fmt, ...)
180 __attribute__ ((format (printf, 1, 2)));
181 void __dprintf(const char *fmt, ...)
182 __attribute__ ((format (printf, 1, 2)));
183 void snprintf(char *str, size_t size, const char *fmt, ...)
184 __attribute__ ((format (printf, 3, 4)));
185 #define dprintf(lvl, fmt, args...) do { \
186 if (CONFIG_DEBUG_LEVEL && (lvl) <= CONFIG_DEBUG_LEVEL) \
187 __dprintf((fmt) , ##args ); \
189 void __debug_enter(struct bregs *regs, const char *fname);
190 void __debug_stub(struct bregs *regs, int lineno, const char *fname);
191 void __debug_isr(const char *fname);
192 #define debug_enter(regs, lvl) do { \
193 if ((lvl) && (lvl) <= CONFIG_DEBUG_LEVEL) \
194 __debug_enter((regs), __func__); \
196 #define debug_isr(lvl) do { \
197 if ((lvl) && (lvl) <= CONFIG_DEBUG_LEVEL) \
198 __debug_isr(__func__); \
200 #define debug_stub(regs) \
201 __debug_stub((regs), __LINE__, __func__)
202 void hexdump(const void *d, int len);
206 void handle_15c2(struct bregs *regs);
207 void process_key(u8 key);
214 extern u64 RamSizeOver4G;
222 static inline int check_time(u64 end) {
223 return (s64)(rdtscll() - end) > 0;
226 void ndelay(u32 count);
227 void udelay(u32 count);
228 void mdelay(u32 count);
229 void nsleep(u32 count);
230 void usleep(u32 count);
231 void msleep(u32 count);
232 u64 calc_future_tsc(u32 msecs);
233 u64 calc_future_tsc_usec(u32 usecs);
234 void handle_1583(struct bregs *regs);
235 void handle_1586(struct bregs *regs);
238 void VISIBLE16 handle_1553(struct bregs *regs);
241 void handle_1ab1(struct bregs *regs);
244 void make_bios_writable();
245 void make_bios_readonly();
248 void pci_setup(void);
254 extern u32 CountCPUs;
255 extern u32 MaxCountCPUs;
256 void wrmsr_smp(u32 index, u64 val);
257 void smp_probe(void);
258 void smp_probe_setup(void);
262 struct cbfs_file *cbfs_findprefix(const char *prefix, struct cbfs_file *last);
263 u32 cbfs_datasize(struct cbfs_file *file);
264 const char *cbfs_filename(struct cbfs_file *file);
265 int cbfs_copyfile(struct cbfs_file *file, void *dst, u32 maxlen);
266 int cbfs_copy_optionrom(void *dst, u32 maxlen, u32 vendev);
267 void cbfs_run_payload(struct cbfs_file *file);
269 void coreboot_copy_biostable();
270 void coreboot_setup();
275 void vgahook_setup(const char *vendor, const char *part);
278 void call_bcv(u16 seg, u16 ip);
279 void optionrom_setup();
281 void s3_resume_vga_init();
288 #define PNP_SIGNATURE 0x506e5024 // $PnP
289 u16 get_pnp_offset();
293 extern struct zone_s ZoneLow, ZoneHigh, ZoneFSeg, ZoneTmpLow, ZoneTmpHigh;
295 void malloc_finalize();
296 void *pmm_malloc(struct zone_s *zone, u32 handle, u32 size, u32 align);
297 int pmm_free(void *data);
300 #define PMM_DEFAULT_HANDLE 0xFFFFFFFF
301 // Minimum alignment of malloc'd memory
302 #define MALLOC_MIN_ALIGN 16
303 // Helper functions for memory allocation.
304 static inline void *malloc_low(u32 size) {
305 return pmm_malloc(&ZoneLow, PMM_DEFAULT_HANDLE, size, MALLOC_MIN_ALIGN);
307 static inline void *malloc_high(u32 size) {
308 return pmm_malloc(&ZoneHigh, PMM_DEFAULT_HANDLE, size, MALLOC_MIN_ALIGN);
310 static inline void *malloc_fseg(u32 size) {
311 return pmm_malloc(&ZoneFSeg, PMM_DEFAULT_HANDLE, size, MALLOC_MIN_ALIGN);
313 static inline void *malloc_tmphigh(u32 size) {
314 return pmm_malloc(&ZoneTmpHigh, PMM_DEFAULT_HANDLE, size, MALLOC_MIN_ALIGN);
316 static inline void *memalign_low(u32 align, u32 size) {
317 return pmm_malloc(&ZoneLow, PMM_DEFAULT_HANDLE, size, align);
319 static inline void *memalign_high(u32 align, u32 size) {
320 return pmm_malloc(&ZoneHigh, PMM_DEFAULT_HANDLE, size, align);
322 static inline void *memalign_tmphigh(u32 align, u32 size) {
323 return pmm_malloc(&ZoneTmpHigh, PMM_DEFAULT_HANDLE, size, align);
325 static inline void free(void *data) {
330 void mtrr_setup(void);
333 void reset_vector() __attribute__ ((noreturn));
336 extern u8 BiosChecksum;
338 // version (auto generated file out/version.c)
339 extern const char VERSION[];