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)
96 static inline u32 __fls(u32 word)
104 static inline u16 __htons_constant(u16 val) {
105 return (val<<8) | (val>>8);
107 static inline u32 __htonl_constant(u32 val) {
108 return (val<<24) | ((val&0xff00)<<8) | ((val&0xff0000)>>8) | (val>>24);
110 static inline u32 __htonl(u32 val) {
111 asm("bswapl %0" : "+r"(val));
114 #define htonl(x) (__builtin_constant_p((u32)(x)) ? __htonl_constant(x) : __htonl(x))
115 #define ntohl(x) htonl(x)
116 #define htons(x) __htons_constant(x)
117 #define ntohs(x) htons(x)
119 static inline u32 getesp(void) {
121 asm("movl %%esp, %0" : "=rm"(esp));
125 static inline void writel(void *addr, u32 val) {
126 *(volatile u32 *)addr = val;
128 static inline void writew(void *addr, u16 val) {
129 *(volatile u16 *)addr = val;
131 static inline void writeb(void *addr, u8 val) {
132 *(volatile u8 *)addr = val;
134 static inline u32 readl(const void *addr) {
135 return *(volatile const u32 *)addr;
137 static inline u16 readw(const void *addr) {
138 return *(volatile const u16 *)addr;
140 static inline u8 readb(const void *addr) {
141 return *(volatile const u8 *)addr;
144 #define call16_simpint(nr, peax, pflags) do { \
153 : "+a"(*peax), "=r"(*pflags) \
158 // GDT bit manipulation
159 #define GDT_BASE(v) ((((u64)(v) & 0xff000000) << 32) \
160 | (((u64)(v) & 0x00ffffff) << 16))
161 #define GDT_LIMIT(v) ((((u64)(v) & 0x000f0000) << 32) \
162 | (((u64)(v) & 0x0000ffff) << 0))
163 #define GDT_CODE (0x9bULL << 40) // Code segment - P,R,A bits also set
164 #define GDT_DATA (0x93ULL << 40) // Data segment - W,A bits also set
165 #define GDT_B (0x1ULL << 54) // Big flag
166 #define GDT_G (0x1ULL << 55) // Granularity flag
175 inline void call16(struct bregs *callregs);
176 inline void call16big(struct bregs *callregs);
177 inline void __call16_int(struct bregs *callregs, u16 offset);
178 #define call16_int(nr, callregs) do { \
179 extern void irq_trampoline_ ##nr (); \
180 __call16_int((callregs), (u32)&irq_trampoline_ ##nr ); \
182 void check_irqs(void);
183 u8 checksum_far(u16 buf_seg, void *buf_far, u32 len);
184 u8 checksum(void *buf, u32 len);
185 size_t strlen(const char *s);
186 int memcmp(const void *s1, const void *s2, size_t n);
187 int strcmp(const char *s1, const char *s2);
188 inline void memset_far(u16 d_seg, void *d_far, u8 c, size_t len);
189 inline void memset16_far(u16 d_seg, void *d_far, u16 c, size_t len);
190 void *memset(void *s, int c, size_t n);
191 inline void memcpy_far(u16 d_seg, void *d_far
192 , u16 s_seg, const void *s_far, size_t len);
193 void *memcpy(void *d1, const void *s1, size_t len);
195 #define memcpy __builtin_memcpy
197 void iomemcpy(void *d, const void *s, u32 len);
198 void *memmove(void *d, const void *s, size_t len);
199 char *strtcpy(char *dest, const char *src, size_t len);
200 void biosusleep(u32 usec);
201 int get_keystroke(int msec);
204 inline u32 stack_hop(u32 eax, u32 edx, u32 ecx, void *func);
205 extern struct thread_info MainThread;
206 void thread_setup(void);
207 struct thread_info *getCurThread(void);
209 void run_thread(void (*func)(void*), void *data);
210 void wait_threads(void);
211 void start_preempt(void);
212 void finish_preempt(void);
213 void check_preempt(void);
216 void debug_serial_setup(void);
217 void panic(const char *fmt, ...)
218 __attribute__ ((format (printf, 1, 2))) __noreturn;
219 void printf(const char *fmt, ...)
220 __attribute__ ((format (printf, 1, 2)));
221 int snprintf(char *str, size_t size, const char *fmt, ...)
222 __attribute__ ((format (printf, 3, 4)));
223 void __dprintf(const char *fmt, ...)
224 __attribute__ ((format (printf, 1, 2)));
225 void __debug_enter(struct bregs *regs, const char *fname);
226 void __debug_isr(const char *fname);
227 void __debug_stub(struct bregs *regs, int lineno, const char *fname);
228 void __warn_invalid(struct bregs *regs, int lineno, const char *fname);
229 void __warn_unimplemented(struct bregs *regs, int lineno, const char *fname);
230 void __warn_noalloc(int lineno, const char *fname);
231 void __warn_timeout(int lineno, const char *fname);
232 void __set_invalid(struct bregs *regs, int lineno, const char *fname);
233 void __set_unimplemented(struct bregs *regs, int lineno, const char *fname);
234 void __set_code_invalid(struct bregs *regs, u32 linecode, const char *fname);
235 void __set_code_unimplemented(struct bregs *regs, u32 linecode
236 , const char *fname);
237 void hexdump(const void *d, int len);
239 #define dprintf(lvl, fmt, args...) do { \
240 if (CONFIG_DEBUG_LEVEL && (lvl) <= CONFIG_DEBUG_LEVEL) \
241 __dprintf((fmt) , ##args ); \
243 #define debug_enter(regs, lvl) do { \
244 if ((lvl) && (lvl) <= CONFIG_DEBUG_LEVEL) \
245 __debug_enter((regs), __func__); \
247 #define debug_isr(lvl) do { \
248 if ((lvl) && (lvl) <= CONFIG_DEBUG_LEVEL) \
249 __debug_isr(__func__); \
251 #define debug_stub(regs) \
252 __debug_stub((regs), __LINE__, __func__)
253 #define warn_invalid(regs) \
254 __warn_invalid((regs), __LINE__, __func__)
255 #define warn_unimplemented(regs) \
256 __warn_unimplemented((regs), __LINE__, __func__)
257 #define warn_noalloc() \
258 __warn_noalloc(__LINE__, __func__)
259 #define warn_timeout() \
260 __warn_timeout(__LINE__, __func__)
261 #define set_invalid(regs) \
262 __set_invalid((regs), __LINE__, __func__)
263 #define set_code_invalid(regs, code) \
264 __set_code_invalid((regs), (code) | (__LINE__ << 8), __func__)
265 #define set_unimplemented(regs) \
266 __set_unimplemented((regs), __LINE__, __func__)
267 #define set_code_unimplemented(regs, code) \
268 __set_code_unimplemented((regs), (code) | (__LINE__ << 8), __func__)
271 void kbd_setup(void);
272 void handle_15c2(struct bregs *regs);
273 void process_key(u8 key);
276 void mouse_setup(void);
277 void process_mouse(u8 data);
281 extern u64 RamSizeOver4G;
282 void mathcp_setup(void);
285 void serial_setup(void);
286 void lpt_setup(void);
289 #define PIT_TICK_RATE 1193180 // Underlying HZ of PIT
290 #define PIT_TICK_INTERVAL 65536 // Default interval for 18.2Hz timer
291 static inline int check_time(u64 end) {
292 return (s64)(rdtscll() - end) > 0;
294 void timer_setup(void);
295 void ndelay(u32 count);
296 void udelay(u32 count);
297 void mdelay(u32 count);
298 void nsleep(u32 count);
299 void usleep(u32 count);
300 void msleep(u32 count);
301 u64 calc_future_tsc(u32 msecs);
302 u64 calc_future_tsc_usec(u32 usecs);
303 void handle_1583(struct bregs *regs);
304 void handle_1586(struct bregs *regs);
306 void releaseRTC(void);
309 void handle_1553(struct bregs *regs);
312 void handle_1ab1(struct bregs *regs);
313 void bios32_setup(void);
316 void make_bios_writable(void);
317 void make_bios_readonly(void);
320 void pci_setup(void);
326 extern u32 CountCPUs;
327 extern u32 MaxCountCPUs;
328 void wrmsr_smp(u32 index, u64 val);
329 void smp_probe(void);
330 void smp_probe_setup(void);
334 struct cbfs_file *cbfs_findprefix(const char *prefix, struct cbfs_file *last);
335 u32 cbfs_datasize(struct cbfs_file *file);
336 const char *cbfs_filename(struct cbfs_file *file);
337 int cbfs_copyfile(struct cbfs_file *file, void *dst, u32 maxlen);
338 int cbfs_copy_optionrom(void *dst, u32 maxlen, u32 vendev);
339 void cbfs_run_payload(struct cbfs_file *file);
341 void coreboot_copy_biostable(void);
342 void coreboot_setup(void);
346 void handle_155f(struct bregs *regs);
347 void vgahook_setup(const char *vendor, const char *part);
350 void call_bcv(u16 seg, u16 ip);
351 void optionrom_setup(void);
352 void vga_setup(void);
353 void s3_resume_vga_init(void);
360 #define PNP_SIGNATURE 0x506e5024 // $PnP
361 u16 get_pnp_offset(void);
362 void pnp_setup(void);
365 extern struct zone_s ZoneLow, ZoneHigh, ZoneFSeg, ZoneTmpLow, ZoneTmpHigh;
366 void malloc_setup(void);
367 void malloc_finalize(void);
368 void *pmm_malloc(struct zone_s *zone, u32 handle, u32 size, u32 align);
369 int pmm_free(void *data);
370 void pmm_setup(void);
371 void pmm_finalize(void);
372 #define PMM_DEFAULT_HANDLE 0xFFFFFFFF
373 // Minimum alignment of malloc'd memory
374 #define MALLOC_MIN_ALIGN 16
375 // Helper functions for memory allocation.
376 static inline void *malloc_low(u32 size) {
377 return pmm_malloc(&ZoneLow, PMM_DEFAULT_HANDLE, size, MALLOC_MIN_ALIGN);
379 static inline void *malloc_high(u32 size) {
380 return pmm_malloc(&ZoneHigh, PMM_DEFAULT_HANDLE, size, MALLOC_MIN_ALIGN);
382 static inline void *malloc_fseg(u32 size) {
383 return pmm_malloc(&ZoneFSeg, PMM_DEFAULT_HANDLE, size, MALLOC_MIN_ALIGN);
385 static inline void *malloc_tmphigh(u32 size) {
386 return pmm_malloc(&ZoneTmpHigh, PMM_DEFAULT_HANDLE, size, MALLOC_MIN_ALIGN);
388 static inline void *memalign_low(u32 align, u32 size) {
389 return pmm_malloc(&ZoneLow, PMM_DEFAULT_HANDLE, size, align);
391 static inline void *memalign_high(u32 align, u32 size) {
392 return pmm_malloc(&ZoneHigh, PMM_DEFAULT_HANDLE, size, align);
394 static inline void *memalign_tmphigh(u32 align, u32 size) {
395 return pmm_malloc(&ZoneTmpHigh, PMM_DEFAULT_HANDLE, size, align);
397 static inline void free(void *data) {
402 void mtrr_setup(void);
405 void reset_vector(void) __noreturn;
408 extern u8 BiosChecksum;
410 // version (auto generated file out/version.c)
411 extern const char VERSION[];