powerpc: Move ppc64 boot wrapper code over to arch/powerpc

This also extends the code to handle 32-bit ELF vmlinux files as well
as 64-bit ones.  This is sufficient for booting on new-world 32-bit
powermacs (i.e. all recent machines).

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 499 insertions, 0 deletions

diff --git a/arch/powerpc/boot/prom.c b/arch/powerpc/boot/prom.c
new file mode 100644
index 000000000000..4bea2f4dcb06
--- /dev/null
+++ b/arch/powerpc/boot/prom.c
@@ -0,0 +1,499 @@
+/*
+ * 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;
+}