+// SPDX-License-Identifier: LGPL-2.1+
/*
* Tiny printf version for SPL
*
* http://www.sparetimelabs.com/printfrevisited/printfrevisited.php
*
* Copyright (C) 2004,2008 Kustaa Nyholm
- *
- * SPDX-License-Identifier: LGPL-2.1+
*/
#include <common.h>
#include <stdarg.h>
#include <serial.h>
+#include <linux/ctype.h>
-/*
- * This code in here may execute before the DRAM is initialised, so
- * we should make sure that it doesn't touch BSS, which some boards
- * put in DRAM.
- */
-static char *bf __attribute__ ((section(".data")));
-static char zs __attribute__ ((section(".data")));
+struct printf_info {
+ char *bf; /* Digit buffer */
+ char zs; /* non-zero if a digit has been written */
+ char *outstr; /* Next output position for sprintf() */
-/* Current position in sprintf() output string */
-static char *outstr __attribute__ ((section(".data")));
+ /* Output a character */
+ void (*putc)(struct printf_info *info, char ch);
+};
-static void out(char c)
+static void out(struct printf_info *info, char c)
{
- *bf++ = c;
+ *info->bf++ = c;
}
-static void out_dgt(char dgt)
+static void out_dgt(struct printf_info *info, char dgt)
{
- out(dgt + (dgt < 10 ? '0' : 'a' - 10));
- zs = 1;
+ out(info, dgt + (dgt < 10 ? '0' : 'a' - 10));
+ info->zs = 1;
}
-static void div_out(unsigned int *num, unsigned int div)
+static void div_out(struct printf_info *info, unsigned long *num,
+ unsigned long div)
{
unsigned char dgt = 0;
dgt++;
}
- if (zs || dgt > 0)
- out_dgt(dgt);
+ if (info->zs || dgt > 0)
+ out_dgt(info, dgt);
}
-int _vprintf(const char *fmt, va_list va, void (*putc)(const char ch))
+#ifdef CONFIG_SPL_NET_SUPPORT
+static void string(struct printf_info *info, char *s)
+{
+ char ch;
+
+ while ((ch = *s++))
+ out(info, ch);
+}
+
+static const char hex_asc[] = "0123456789abcdef";
+#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
+#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
+
+static inline char *pack_hex_byte(char *buf, u8 byte)
+{
+ *buf++ = hex_asc_hi(byte);
+ *buf++ = hex_asc_lo(byte);
+ return buf;
+}
+
+static void mac_address_string(struct printf_info *info, u8 *addr,
+ bool separator)
+{
+ /* (6 * 2 hex digits), 5 colons and trailing zero */
+ char mac_addr[6 * 3];
+ char *p = mac_addr;
+ int i;
+
+ for (i = 0; i < 6; i++) {
+ p = pack_hex_byte(p, addr[i]);
+ if (separator && i != 5)
+ *p++ = ':';
+ }
+ *p = '\0';
+
+ string(info, mac_addr);
+}
+
+static char *put_dec_trunc(char *buf, unsigned int q)
+{
+ unsigned int d3, d2, d1, d0;
+ d1 = (q >> 4) & 0xf;
+ d2 = (q >> 8) & 0xf;
+ d3 = (q >> 12);
+
+ d0 = 6 * (d3 + d2 + d1) + (q & 0xf);
+ q = (d0 * 0xcd) >> 11;
+ d0 = d0 - 10 * q;
+ *buf++ = d0 + '0'; /* least significant digit */
+ d1 = q + 9 * d3 + 5 * d2 + d1;
+ if (d1 != 0) {
+ q = (d1 * 0xcd) >> 11;
+ d1 = d1 - 10 * q;
+ *buf++ = d1 + '0'; /* next digit */
+
+ d2 = q + 2 * d2;
+ if ((d2 != 0) || (d3 != 0)) {
+ q = (d2 * 0xd) >> 7;
+ d2 = d2 - 10 * q;
+ *buf++ = d2 + '0'; /* next digit */
+
+ d3 = q + 4 * d3;
+ if (d3 != 0) {
+ q = (d3 * 0xcd) >> 11;
+ d3 = d3 - 10 * q;
+ *buf++ = d3 + '0'; /* next digit */
+ if (q != 0)
+ *buf++ = q + '0'; /* most sign. digit */
+ }
+ }
+ }
+ return buf;
+}
+
+static void ip4_addr_string(struct printf_info *info, u8 *addr)
+{
+ /* (4 * 3 decimal digits), 3 dots and trailing zero */
+ char ip4_addr[4 * 4];
+ char temp[3]; /* hold each IP quad in reverse order */
+ char *p = ip4_addr;
+ int i, digits;
+
+ for (i = 0; i < 4; i++) {
+ digits = put_dec_trunc(temp, addr[i]) - temp;
+ /* reverse the digits in the quad */
+ while (digits--)
+ *p++ = temp[digits];
+ if (i != 3)
+ *p++ = '.';
+ }
+ *p = '\0';
+
+ string(info, ip4_addr);
+}
+#endif
+
+/*
+ * Show a '%p' thing. A kernel extension is that the '%p' is followed
+ * by an extra set of characters that are extended format
+ * specifiers.
+ *
+ * Right now we handle:
+ *
+ * - 'M' For a 6-byte MAC address, it prints the address in the
+ * usual colon-separated hex notation.
+ * - 'm' Same as above except there is no colon-separator.
+ * - 'I4'for IPv4 addresses printed in the usual way (dot-separated
+ * decimal).
+ */
+
+static void pointer(struct printf_info *info, const char *fmt, void *ptr)
+{
+#ifdef DEBUG
+ unsigned long num = (uintptr_t)ptr;
+ unsigned long div;
+#endif
+
+ switch (*fmt) {
+#ifdef DEBUG
+ case 'a':
+
+ switch (fmt[1]) {
+ case 'p':
+ default:
+ num = *(phys_addr_t *)ptr;
+ break;
+ }
+ break;
+#endif
+#ifdef CONFIG_SPL_NET_SUPPORT
+ case 'm':
+ return mac_address_string(info, ptr, false);
+ case 'M':
+ return mac_address_string(info, ptr, true);
+ case 'I':
+ if (fmt[1] == '4')
+ return ip4_addr_string(info, ptr);
+#endif
+ default:
+ break;
+ }
+#ifdef DEBUG
+ div = 1UL << (sizeof(long) * 8 - 4);
+ for (; div; div /= 0x10)
+ div_out(info, &num, div);
+#endif
+}
+
+static int _vprintf(struct printf_info *info, const char *fmt, va_list va)
{
char ch;
char *p;
- unsigned int num;
+ unsigned long num;
char buf[12];
- unsigned int div;
+ unsigned long div;
while ((ch = *(fmt++))) {
if (ch != '%') {
- putc(ch);
+ info->putc(info, ch);
} else {
bool lz = false;
int width = 0;
+ bool islong = false;
ch = *(fmt++);
+ if (ch == '-')
+ ch = *(fmt++);
+
if (ch == '0') {
ch = *(fmt++);
lz = 1;
ch = *fmt++;
}
}
- bf = buf;
- p = bf;
- zs = 0;
+ if (ch == 'l') {
+ ch = *(fmt++);
+ islong = true;
+ }
+
+ info->bf = buf;
+ p = info->bf;
+ info->zs = 0;
switch (ch) {
case '\0':
goto abort;
case 'u':
case 'd':
- num = va_arg(va, unsigned int);
- if (ch == 'd' && (int)num < 0) {
- num = -(int)num;
- out('-');
+ div = 1000000000;
+ if (islong) {
+ num = va_arg(va, unsigned long);
+ if (sizeof(long) > 4)
+ div *= div * 10;
+ } else {
+ num = va_arg(va, unsigned int);
+ }
+
+ if (ch == 'd') {
+ if (islong && (long)num < 0) {
+ num = -(long)num;
+ out(info, '-');
+ } else if (!islong && (int)num < 0) {
+ num = -(int)num;
+ out(info, '-');
+ }
}
if (!num) {
- out_dgt(0);
+ out_dgt(info, 0);
} else {
- for (div = 1000000000; div; div /= 10)
- div_out(&num, div);
+ for (; div; div /= 10)
+ div_out(info, &num, div);
}
break;
case 'x':
- num = va_arg(va, unsigned int);
+ if (islong) {
+ num = va_arg(va, unsigned long);
+ div = 1UL << (sizeof(long) * 8 - 4);
+ } else {
+ num = va_arg(va, unsigned int);
+ div = 0x10000000;
+ }
if (!num) {
- out_dgt(0);
+ out_dgt(info, 0);
} else {
- for (div = 0x10000000; div; div /= 0x10)
- div_out(&num, div);
+ for (; div; div /= 0x10)
+ div_out(info, &num, div);
}
break;
case 'c':
- out((char)(va_arg(va, int)));
+ out(info, (char)(va_arg(va, int)));
break;
case 's':
p = va_arg(va, char*);
break;
+ case 'p':
+ pointer(info, fmt, va_arg(va, void *));
+ while (isalnum(fmt[0]))
+ fmt++;
+ break;
case '%':
- out('%');
+ out(info, '%');
default:
break;
}
- *bf = 0;
- bf = p;
- while (*bf++ && width > 0)
+ *info->bf = 0;
+ info->bf = p;
+ while (*info->bf++ && width > 0)
width--;
while (width-- > 0)
- putc(lz ? '0' : ' ');
+ info->putc(info, lz ? '0' : ' ');
if (p) {
while ((ch = *p++))
- putc(ch);
+ info->putc(info, ch);
}
}
}
return 0;
}
+#if CONFIG_IS_ENABLED(PRINTF)
+static void putc_normal(struct printf_info *info, char ch)
+{
+ putc(ch);
+}
+
int vprintf(const char *fmt, va_list va)
{
- return _vprintf(fmt, va, putc);
+ struct printf_info info;
+
+ info.putc = putc_normal;
+ return _vprintf(&info, fmt, va);
}
int printf(const char *fmt, ...)
{
+ struct printf_info info;
+
va_list va;
int ret;
+ info.putc = putc_normal;
va_start(va, fmt);
- ret = _vprintf(fmt, va, putc);
+ ret = _vprintf(&info, fmt, va);
va_end(va);
return ret;
}
+#endif
-static void putc_outstr(char ch)
+static void putc_outstr(struct printf_info *info, char ch)
{
- *outstr++ = ch;
+ *info->outstr++ = ch;
}
int sprintf(char *buf, const char *fmt, ...)
{
+ struct printf_info info;
va_list va;
int ret;
va_start(va, fmt);
- outstr = buf;
- ret = _vprintf(fmt, va, putc_outstr);
+ info.outstr = buf;
+ info.putc = putc_outstr;
+ ret = _vprintf(&info, fmt, va);
va_end(va);
- *outstr = '\0';
+ *info.outstr = '\0';
return ret;
}
/* Note that size is ignored */
int snprintf(char *buf, size_t size, const char *fmt, ...)
{
+ struct printf_info info;
va_list va;
int ret;
va_start(va, fmt);
- outstr = buf;
- ret = _vprintf(fmt, va, putc_outstr);
+ info.outstr = buf;
+ info.putc = putc_outstr;
+ ret = _vprintf(&info, fmt, va);
va_end(va);
- *outstr = '\0';
+ *info.outstr = '\0';
return ret;
}
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