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/*
* Copyright (c) 2014-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch.h>
#include <arch_helpers.h>
#include <assert.h>
#include <debug.h>
#include <limits.h>
#include <stdarg.h>
#include <stdint.h>
/***********************************************************
* The tf_printf implementation for all BL stages
***********************************************************/
#define get_num_va_args(args, lcount) \
(((lcount) > 1) ? va_arg(args, long long int) : \
((lcount) ? va_arg(args, long int) : va_arg(args, int)))
#define get_unum_va_args(args, lcount) \
(((lcount) > 1) ? va_arg(args, unsigned long long int) : \
((lcount) ? va_arg(args, unsigned long int) : va_arg(args, unsigned int)))
static void string_print(const char *str)
{
while (*str)
putchar(*str++);
}
#ifdef AARCH32
#define unsigned_num_print(unum, radix) \
do { \
if ((radix) == 16) \
unsigned_hex_print(unum); \
else if ((radix) == 10) \
unsigned_dec_print(unum); \
else \
string_print("tf_printf : Unsupported radix");\
} while (0);
/*
* Utility function to print an unsigned number in decimal format for AArch32.
* The function doesn't support printing decimal integers higher than 32 bits
* to avoid having to implement 64-bit integer compiler library functions.
*/
static void unsigned_dec_print(unsigned long long int unum)
{
unsigned int local_num;
/* Just need enough space to store 32 bit decimal integer */
unsigned char num_buf[10];
int i = 0, rem;
if (unum > UINT_MAX) {
string_print("tf_printf : decimal numbers higher than 32 bits"
" not supported\n");
return;
}
local_num = (unsigned int)unum;
do {
rem = local_num % 10;
num_buf[i++] = '0' + rem;
} while (local_num /= 10);
while (--i >= 0)
putchar(num_buf[i]);
}
/*
* Utility function to print an unsigned number in hexadecimal format for
* AArch32. The function doesn't use 64-bit integer arithmetic to avoid
* having to implement 64-bit compiler library functions. It splits the
* 64 bit number into two 32 bit numbers and converts them into equivalent
* ASCII characters.
*/
static void unsigned_hex_print(unsigned long long int unum)
{
/* Just need enough space to store 16 characters */
unsigned char num_buf[16];
int i = 0, rem;
uint32_t num_local = 0, num_msb = 0;
/* Get the LSB of 64 bit unum */
num_local = (uint32_t)unum;
/* Get the MSB of 64 bit unum. This works only on Little Endian */
assert((read_sctlr() & SCTLR_EE_BIT) == 0);
num_msb = *(((uint32_t *) &unum) + 1);
do {
do {
rem = (num_local & 0xf);
if (rem < 0xa)
num_buf[i++] = '0' + rem;
else
num_buf[i++] = 'a' + (rem - 0xa);
} while (num_local >>= 4);
num_local = num_msb;
num_msb = 0;
} while (num_local);
while (--i >= 0)
putchar(num_buf[i]);
}
#else
static void unsigned_num_print(unsigned long long int unum, unsigned int radix)
{
/* Just need enough space to store 64 bit decimal integer */
unsigned char num_buf[20];
int i = 0, rem;
do {
rem = unum % radix;
if (rem < 0xa)
num_buf[i++] = '0' + rem;
else
num_buf[i++] = 'a' + (rem - 0xa);
} while (unum /= radix);
while (--i >= 0)
putchar(num_buf[i]);
}
#endif /* AARCH32 */
/*******************************************************************
* Reduced format print for Trusted firmware.
* The following type specifiers are supported by this print
* %x - hexadecimal format
* %s - string format
* %d or %i - signed decimal format
* %u - unsigned decimal format
* %p - pointer format
*
* The following length specifiers are supported by this print
* %l - long int (64-bit on AArch64)
* %ll - long long int (64-bit on AArch64)
* %z - size_t sized integer formats (64 bit on AArch64)
*
* The print exits on all other formats specifiers other than valid
* combinations of the above specifiers.
*******************************************************************/
void tf_printf(const char *fmt, ...)
{
va_list args;
int l_count;
long long int num;
unsigned long long int unum;
char *str;
va_start(args, fmt);
while (*fmt) {
l_count = 0;
if (*fmt == '%') {
fmt++;
/* Check the format specifier */
loop:
switch (*fmt) {
case 'i': /* Fall through to next one */
case 'd':
num = get_num_va_args(args, l_count);
if (num < 0) {
putchar('-');
unum = (unsigned long long int)-num;
} else
unum = (unsigned long long int)num;
unsigned_num_print(unum, 10);
break;
case 's':
str = va_arg(args, char *);
string_print(str);
break;
case 'p':
unum = (uintptr_t)va_arg(args, void *);
if (unum)
string_print("0x");
unsigned_num_print(unum, 16);
break;
case 'x':
unum = get_unum_va_args(args, l_count);
unsigned_num_print(unum, 16);
break;
case 'z':
if (sizeof(size_t) == 8)
l_count = 2;
fmt++;
goto loop;
case 'l':
l_count++;
fmt++;
goto loop;
case 'u':
unum = get_unum_va_args(args, l_count);
unsigned_num_print(unum, 10);
break;
default:
/* Exit on any other format specifier */
goto exit;
}
fmt++;
continue;
}
putchar(*fmt++);
}
exit:
va_end(args);
}
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