arch/ppc64/boot/prom.c - arm/linux-arm64-legacy - Git at Google

 /*
  * Copyright (C) Paul Mackerras 1997.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version
  * 2 of the License, or (at your option) any later version.
  */
 #include <stdarg.h>
 #include <stddef.h>
 #include "string.h"
 #include "stdio.h"
 #include "prom.h"

 int (*prom)(void *);

 void *chosen_handle;

 void *stdin;
 void *stdout;
 void *stderr;


 int
 write(void *handle, void *ptr, int nb)
 {
 	struct prom_args {
 		char *service;
 		int nargs;
 		int nret;
 		void *ihandle;
 		void *addr;
 		int len;
 		int actual;
 	} args;

 	args.service = "write";
 	args.nargs = 3;
 	args.nret = 1;
 	args.ihandle = handle;
 	args.addr = ptr;
 	args.len = nb;
 	args.actual = -1;
 	(*prom)(&args);
 	return args.actual;
 }

 int
 read(void *handle, void *ptr, int nb)
 {
 	struct prom_args {
 		char *service;
 		int nargs;
 		int nret;
 		void *ihandle;
 		void *addr;
 		int len;
 		int actual;
 	} args;

 	args.service = "read";
 	args.nargs = 3;
 	args.nret = 1;
 	args.ihandle = handle;
 	args.addr = ptr;
 	args.len = nb;
 	args.actual = -1;
 	(*prom)(&args);
 	return args.actual;
 }

 void
 exit()
 {
 	struct prom_args {
 		char *service;
 	} args;

 	for (;;) {
 		args.service = "exit";
 		(*prom)(&args);
 	}
 }

 void
 pause(void)
 {
 	struct prom_args {
 		char *service;
 	} args;

 	args.service = "enter";
 	(*prom)(&args);
 }

 void *
 finddevice(const char *name)
 {
 	struct prom_args {
 		char *service;
 		int nargs;
 		int nret;
 		const char *devspec;
 		void *phandle;
 	} args;

 	args.service = "finddevice";
 	args.nargs = 1;
 	args.nret = 1;
 	args.devspec = name;
 	args.phandle = (void *) -1;
 	(*prom)(&args);
 	return args.phandle;
 }

 void *
 claim(unsigned long virt, unsigned long size, unsigned long align)
 {
 	struct prom_args {
 		char *service;
 		int nargs;
 		int nret;
 		unsigned int virt;
 		unsigned int size;
 		unsigned int align;
 		void *ret;
 	} args;

 	args.service = "claim";
 	args.nargs = 3;
 	args.nret = 1;
 	args.virt = virt;
 	args.size = size;
 	args.align = align;
 	(*prom)(&args);
 	return args.ret;
 }

 int
 getprop(void *phandle, const char *name, void *buf, int buflen)
 {
 	struct prom_args {
 		char *service;
 		int nargs;
 		int nret;
 		void *phandle;
 		const char *name;
 		void *buf;
 		int buflen;
 		int size;
 	} args;

 	args.service = "getprop";
 	args.nargs = 4;
 	args.nret = 1;
 	args.phandle = phandle;
 	args.name = name;
 	args.buf = buf;
 	args.buflen = buflen;
 	args.size = -1;
 	(*prom)(&args);
 	return args.size;
 }

 int
 putc(int c, void *f)
 {
 	char ch = c;

 	if (c == '\n')
 		putc('\r', f);
 	return write(f, &ch, 1) == 1? c: -1;
 }

 int
 putchar(int c)
 {
 	return putc(c, stdout);
 }

 int
 fputs(char *str, void *f)
 {
 	int n = strlen(str);

 	return write(f, str, n) == n? 0: -1;
 }

 size_t strnlen(const char * s, size_t count)
 {
 	const char *sc;

 	for (sc = s; count-- && *sc != '\0'; ++sc)
 		/* nothing */;
 	return sc - s;
 }

 extern unsigned int __div64_32(unsigned long long *dividend,
 			       unsigned int divisor);

 /* The unnecessary pointer compare is there
  * to check for type safety (n must be 64bit)
  */
 # define do_div(n,base) ({						\
 	unsigned int __base = (base);					\
 	unsigned int __rem;						\
 	(void)(((typeof((n)) *)0) == ((unsigned long long *)0));	\
 	if (((n) >> 32) == 0) {						\
 		__rem = (unsigned int)(n) % __base;			\
 		(n) = (unsigned int)(n) / __base;			\
 	} else								\
 		__rem = __div64_32(&(n), __base);			\
 	__rem;								\
  })

 static int skip_atoi(const char **s)
 {
 	int i, c;

 	for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
 		i = i*10 + c - '0';
 	return i;
 }

 #define ZEROPAD	1		/* pad with zero */
 #define SIGN	2		/* unsigned/signed long */
 #define PLUS	4		/* show plus */
 #define SPACE	8		/* space if plus */
 #define LEFT	16		/* left justified */
 #define SPECIAL	32		/* 0x */
 #define LARGE	64		/* use 'ABCDEF' instead of 'abcdef' */

 static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
 {
 	char c,sign,tmp[66];
 	const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
 	int i;

 	if (type & LARGE)
 		digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 	if (type & LEFT)
 		type &= ~ZEROPAD;
 	if (base < 2 || base > 36)
 		return 0;
 	c = (type & ZEROPAD) ? '0' : ' ';
 	sign = 0;
 	if (type & SIGN) {
 		if ((signed long long)num < 0) {
 			sign = '-';
 			num = - (signed long long)num;
 			size--;
 		} else if (type & PLUS) {
 			sign = '+';
 			size--;
 		} else if (type & SPACE) {
 			sign = ' ';
 			size--;
 		}
 	}
 	if (type & SPECIAL) {
 		if (base == 16)
 			size -= 2;
 		else if (base == 8)
 			size--;
 	}
 	i = 0;
 	if (num == 0)
 		tmp[i++]='0';
 	else while (num != 0) {
 		tmp[i++] = digits[do_div(num, base)];
 	}
 	if (i > precision)
 		precision = i;
 	size -= precision;
 	if (!(type&(ZEROPAD+LEFT)))
 		while(size-->0)
 			*str++ = ' ';
 	if (sign)
 		*str++ = sign;
 	if (type & SPECIAL) {
 		if (base==8)
 			*str++ = '0';
 		else if (base==16) {
 			*str++ = '0';
 			*str++ = digits[33];
 		}
 	}
 	if (!(type & LEFT))
 		while (size-- > 0)
 			*str++ = c;
 	while (i < precision--)
 		*str++ = '0';
 	while (i-- > 0)
 		*str++ = tmp[i];
 	while (size-- > 0)
 		*str++ = ' ';
 	return str;
 }

 int vsprintf(char *buf, const char *fmt, va_list args)
 {
 	int len;
 	unsigned long long num;
 	int i, base;
 	char * str;
 	const char *s;

 	int flags;		/* flags to number() */

 	int field_width;	/* width of output field */
 	int precision;		/* min. # of digits for integers; max
 				   number of chars for from string */
 	int qualifier;		/* 'h', 'l', or 'L' for integer fields */
 	                        /* 'z' support added 23/7/1999 S.H.    */
 				/* 'z' changed to 'Z' --davidm 1/25/99 */


 	for (str=buf ; *fmt ; ++fmt) {
 		if (*fmt != '%') {
 			*str++ = *fmt;
 			continue;
 		}

 		/* process flags */
 		flags = 0;
 		repeat:
 			++fmt;		/* this also skips first '%' */
 			switch (*fmt) {
 				case '-': flags |= LEFT; goto repeat;
 				case '+': flags |= PLUS; goto repeat;
 				case ' ': flags |= SPACE; goto repeat;
 				case '#': flags |= SPECIAL; goto repeat;
 				case '0': flags |= ZEROPAD; goto repeat;
 				}

 		/* get field width */
 		field_width = -1;
 		if ('0' <= *fmt && *fmt <= '9')
 			field_width = skip_atoi(&fmt);
 		else if (*fmt == '*') {
 			++fmt;
 			/* it's the next argument */
 			field_width = va_arg(args, int);
 			if (field_width < 0) {
 				field_width = -field_width;
 				flags |= LEFT;
 			}
 		}

 		/* get the precision */
 		precision = -1;
 		if (*fmt == '.') {
 			++fmt;
 			if ('0' <= *fmt && *fmt <= '9')
 				precision = skip_atoi(&fmt);
 			else if (*fmt == '*') {
 				++fmt;
 				/* it's the next argument */
 				precision = va_arg(args, int);
 			}
 			if (precision < 0)
 				precision = 0;
 		}

 		/* get the conversion qualifier */
 		qualifier = -1;
 		if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || *fmt =='Z') {
 			qualifier = *fmt;
 			++fmt;
 		}

 		/* default base */
 		base = 10;

 		switch (*fmt) {
 		case 'c':
 			if (!(flags & LEFT))
 				while (--field_width > 0)
 					*str++ = ' ';
 			*str++ = (unsigned char) va_arg(args, int);
 			while (--field_width > 0)
 				*str++ = ' ';
 			continue;

 		case 's':
 			s = va_arg(args, char *);
 			if (!s)
 				s = "<NULL>";

 			len = strnlen(s, precision);

 			if (!(flags & LEFT))
 				while (len < field_width--)
 					*str++ = ' ';
 			for (i = 0; i < len; ++i)
 				*str++ = *s++;
 			while (len < field_width--)
 				*str++ = ' ';
 			continue;

 		case 'p':
 			if (field_width == -1) {
 				field_width = 2*sizeof(void *);
 				flags |= ZEROPAD;
 			}
 			str = number(str,
 				(unsigned long) va_arg(args, void *), 16,
 				field_width, precision, flags);
 			continue;


 		case 'n':
 			if (qualifier == 'l') {
 				long * ip = va_arg(args, long *);
 				*ip = (str - buf);
 			} else if (qualifier == 'Z') {
 				size_t * ip = va_arg(args, size_t *);
 				*ip = (str - buf);
 			} else {
 				int * ip = va_arg(args, int *);
 				*ip = (str - buf);
 			}
 			continue;

 		case '%':
 			*str++ = '%';
 			continue;

 		/* integer number formats - set up the flags and "break" */
 		case 'o':
 			base = 8;
 			break;

 		case 'X':
 			flags |= LARGE;
 		case 'x':
 			base = 16;
 			break;

 		case 'd':
 		case 'i':
 			flags |= SIGN;
 		case 'u':
 			break;

 		default:
 			*str++ = '%';
 			if (*fmt)
 				*str++ = *fmt;
 			else
 				--fmt;
 			continue;
 		}
 		if (qualifier == 'l') {
 			num = va_arg(args, unsigned long);
 			if (flags & SIGN)
 				num = (signed long) num;
 		} else if (qualifier == 'Z') {
 			num = va_arg(args, size_t);
 		} else if (qualifier == 'h') {
 			num = (unsigned short) va_arg(args, int);
 			if (flags & SIGN)
 				num = (signed short) num;
 		} else {
 			num = va_arg(args, unsigned int);
 			if (flags & SIGN)
 				num = (signed int) num;
 		}
 		str = number(str, num, base, field_width, precision, flags);
 	}
 	*str = '\0';
 	return str-buf;
 }

 int sprintf(char * buf, const char *fmt, ...)
 {
 	va_list args;
 	int i;

 	va_start(args, fmt);
 	i=vsprintf(buf,fmt,args);
 	va_end(args);
 	return i;
 }

 static char sprint_buf[1024];

 int
 printf(const char *fmt, ...)
 {
 	va_list args;
 	int n;

 	va_start(args, fmt);
 	n = vsprintf(sprint_buf, fmt, args);
 	va_end(args);
 	write(stdout, sprint_buf, n);
 	return n;
 }
	/*
	* Copyright (C) Paul Mackerras 1997.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version
	* 2 of the License, or (at your option) any later version.
	*/
	#include <stdarg.h>
	#include <stddef.h>
	#include "string.h"
	#include "stdio.h"
	#include "prom.h"

	int (prom)(void );

	void *chosen_handle;

	void *stdin;
	void *stdout;
	void *stderr;


	int
	write(void handle, void ptr, int nb)
	{
	struct prom_args {
	char *service;
	int nargs;
	int nret;
	void *ihandle;
	void *addr;
	int len;
	int actual;
	} args;

	args.service = "write";
	args.nargs = 3;
	args.nret = 1;
	args.ihandle = handle;
	args.addr = ptr;
	args.len = nb;
	args.actual = -1;
	(*prom)(&args);
	return args.actual;
	}

	int
	read(void handle, void ptr, int nb)
	{
	struct prom_args {
	char *service;
	int nargs;
	int nret;
	void *ihandle;
	void *addr;
	int len;
	int actual;
	} args;

	args.service = "read";
	args.nargs = 3;
	args.nret = 1;
	args.ihandle = handle;
	args.addr = ptr;
	args.len = nb;
	args.actual = -1;
	(*prom)(&args);
	return args.actual;
	}

	void
	exit()
	{
	struct prom_args {
	char *service;
	} args;

	for (;;) {
	args.service = "exit";
	(*prom)(&args);
	}
	}

	void
	pause(void)
	{
	struct prom_args {
	char *service;
	} args;

	args.service = "enter";
	(*prom)(&args);
	}

	void *
	finddevice(const char *name)
	{
	struct prom_args {
	char *service;
	int nargs;
	int nret;
	const char *devspec;
	void *phandle;
	} args;

	args.service = "finddevice";
	args.nargs = 1;
	args.nret = 1;
	args.devspec = name;
	args.phandle = (void *) -1;
	(*prom)(&args);
	return args.phandle;
	}

	void *
	claim(unsigned long virt, unsigned long size, unsigned long align)
	{
	struct prom_args {
	char *service;
	int nargs;
	int nret;
	unsigned int virt;
	unsigned int size;
	unsigned int align;
	void *ret;
	} args;

	args.service = "claim";
	args.nargs = 3;
	args.nret = 1;
	args.virt = virt;
	args.size = size;
	args.align = align;
	(*prom)(&args);
	return args.ret;
	}

	int
	getprop(void phandle, const char name, void *buf, int buflen)
	{
	struct prom_args {
	char *service;
	int nargs;
	int nret;
	void *phandle;
	const char *name;
	void *buf;
	int buflen;
	int size;
	} args;

	args.service = "getprop";
	args.nargs = 4;
	args.nret = 1;
	args.phandle = phandle;
	args.name = name;
	args.buf = buf;
	args.buflen = buflen;
	args.size = -1;
	(*prom)(&args);
	return args.size;
	}

	int
	putc(int c, void *f)
	{
	char ch = c;

	if (c == '\n')
	putc('\r', f);
	return write(f, &ch, 1) == 1? c: -1;
	}

	int
	putchar(int c)
	{
	return putc(c, stdout);
	}

	int
	fputs(char str, void f)
	{
	int n = strlen(str);

	return write(f, str, n) == n? 0: -1;
	}

	size_t strnlen(const char * s, size_t count)
	{
	const char *sc;

	for (sc = s; count-- && *sc != '\0'; ++sc)
	/* nothing */;
	return sc - s;
	}

	extern unsigned int __div64_32(unsigned long long *dividend,
	unsigned int divisor);

	/* The unnecessary pointer compare is there
	* to check for type safety (n must be 64bit)
	*/
	# define do_div(n,base) ({ \
	unsigned int __base = (base); \
	unsigned int __rem; \
	(void)(((typeof((n)) )0) == ((unsigned long long )0)); \
	if (((n) >> 32) == 0) { \
	__rem = (unsigned int)(n) % __base; \
	(n) = (unsigned int)(n) / __base; \
	} else \
	__rem = __div64_32(&(n), __base); \
	__rem; \
	})

	static int skip_atoi(const char **s)
	{
	int i, c;

	for (i = 0; '0' <= (c = *s) && c <= '9'; ++s)
	i = i*10 + c - '0';
	return i;
	}

	#define ZEROPAD 1 /* pad with zero */
	#define SIGN 2 /* unsigned/signed long */
	#define PLUS 4 /* show plus */
	#define SPACE 8 /* space if plus */
	#define LEFT 16 /* left justified */
	#define SPECIAL 32 /* 0x */
	#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */

	static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
	{
	char c,sign,tmp[66];
	const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
	int i;

	if (type & LARGE)
	digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	if (type & LEFT)
	type &= ~ZEROPAD;
	if (base < 2 \|\| base > 36)
	return 0;
	c = (type & ZEROPAD) ? '0' : ' ';
	sign = 0;
	if (type & SIGN) {
	if ((signed long long)num < 0) {
	sign = '-';
	num = - (signed long long)num;
	size--;
	} else if (type & PLUS) {
	sign = '+';
	size--;
	} else if (type & SPACE) {
	sign = ' ';
	size--;
	}
	}
	if (type & SPECIAL) {
	if (base == 16)
	size -= 2;
	else if (base == 8)
	size--;
	}
	i = 0;
	if (num == 0)
	tmp[i++]='0';
	else while (num != 0) {
	tmp[i++] = digits[do_div(num, base)];
	}
	if (i > precision)
	precision = i;
	size -= precision;
	if (!(type&(ZEROPAD+LEFT)))
	while(size-->0)
	*str++ = ' ';
	if (sign)
	*str++ = sign;
	if (type & SPECIAL) {
	if (base==8)
	*str++ = '0';
	else if (base==16) {
	*str++ = '0';
	*str++ = digits[33];
	}
	}
	if (!(type & LEFT))
	while (size-- > 0)
	*str++ = c;
	while (i < precision--)
	*str++ = '0';
	while (i-- > 0)
	*str++ = tmp[i];
	while (size-- > 0)
	*str++ = ' ';
	return str;
	}

	int vsprintf(char buf, const char fmt, va_list args)
	{
	int len;
	unsigned long long num;
	int i, base;
	char * str;
	const char *s;

	int flags; /* flags to number() */

	int field_width; /* width of output field */
	int precision; /* min. # of digits for integers; max
	number of chars for from string */
	int qualifier; /* 'h', 'l', or 'L' for integer fields */
	/* 'z' support added 23/7/1999 S.H. */
	/* 'z' changed to 'Z' --davidm 1/25/99 */


	for (str=buf ; *fmt ; ++fmt) {
	if (*fmt != '%') {
	str++ = fmt;
	continue;
	}

	/* process flags */
	flags = 0;
	repeat:
	++fmt; /* this also skips first '%' */
	switch (*fmt) {
	case '-': flags \|= LEFT; goto repeat;
	case '+': flags \|= PLUS; goto repeat;
	case ' ': flags \|= SPACE; goto repeat;
	case '#': flags \|= SPECIAL; goto repeat;
	case '0': flags \|= ZEROPAD; goto repeat;
	}

	/* get field width */
	field_width = -1;
	if ('0' <= fmt && fmt <= '9')
	field_width = skip_atoi(&fmt);
	else if (fmt == '') {
	++fmt;
	/* it's the next argument */
	field_width = va_arg(args, int);
	if (field_width < 0) {
	field_width = -field_width;
	flags \|= LEFT;
	}
	}

	/* get the precision */
	precision = -1;
	if (*fmt == '.') {
	++fmt;
	if ('0' <= fmt && fmt <= '9')
	precision = skip_atoi(&fmt);
	else if (fmt == '') {
	++fmt;
	/* it's the next argument */
	precision = va_arg(args, int);
	}
	if (precision < 0)
	precision = 0;
	}

	/* get the conversion qualifier */
	qualifier = -1;
	if (fmt == 'h' \|\| fmt == 'l' \|\| fmt == 'L' \|\| fmt =='Z') {
	qualifier = *fmt;
	++fmt;
	}

	/* default base */
	base = 10;

	switch (*fmt) {
	case 'c':
	if (!(flags & LEFT))
	while (--field_width > 0)
	*str++ = ' ';
	*str++ = (unsigned char) va_arg(args, int);
	while (--field_width > 0)
	*str++ = ' ';
	continue;

	case 's':
	s = va_arg(args, char *);
	if (!s)
	s = "<NULL>";

	len = strnlen(s, precision);

	if (!(flags & LEFT))
	while (len < field_width--)
	*str++ = ' ';
	for (i = 0; i < len; ++i)
	str++ = s++;
	while (len < field_width--)
	*str++ = ' ';
	continue;

	case 'p':
	if (field_width == -1) {
	field_width = 2sizeof(void );
	flags \|= ZEROPAD;
	}
	str = number(str,
	(unsigned long) va_arg(args, void *), 16,
	field_width, precision, flags);
	continue;


	case 'n':
	if (qualifier == 'l') {
	long * ip = va_arg(args, long *);
	*ip = (str - buf);
	} else if (qualifier == 'Z') {
	size_t * ip = va_arg(args, size_t *);
	*ip = (str - buf);
	} else {
	int * ip = va_arg(args, int *);
	*ip = (str - buf);
	}
	continue;

	case '%':
	*str++ = '%';
	continue;

	/* integer number formats - set up the flags and "break" */
	case 'o':
	base = 8;
	break;

	case 'X':
	flags \|= LARGE;
	case 'x':
	base = 16;
	break;

	case 'd':
	case 'i':
	flags \|= SIGN;
	case 'u':
	break;

	default:
	*str++ = '%';
	if (*fmt)
	str++ = fmt;
	else
	--fmt;
	continue;
	}
	if (qualifier == 'l') {
	num = va_arg(args, unsigned long);
	if (flags & SIGN)
	num = (signed long) num;
	} else if (qualifier == 'Z') {
	num = va_arg(args, size_t);
	} else if (qualifier == 'h') {
	num = (unsigned short) va_arg(args, int);
	if (flags & SIGN)
	num = (signed short) num;
	} else {
	num = va_arg(args, unsigned int);
	if (flags & SIGN)
	num = (signed int) num;
	}
	str = number(str, num, base, field_width, precision, flags);
	}
	*str = '\0';
	return str-buf;
	}

	int sprintf(char * buf, const char *fmt, ...)
	{
	va_list args;
	int i;

	va_start(args, fmt);
	i=vsprintf(buf,fmt,args);
	va_end(args);
	return i;
	}

	static char sprint_buf[1024];

	int
	printf(const char *fmt, ...)
	{
	va_list args;
	int n;

	va_start(args, fmt);
	n = vsprintf(sprint_buf, fmt, args);
	va_end(args);
	write(stdout, sprint_buf, n);
	return n;
	}