112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/*
|
|
|
|
Copyright (c) 2010 Red Hat Incorporated.
|
|
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.
|
|
|
|
The name of Red Hat Incorporated may not 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 RED HAT INCORPORATED 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.
|
|
|
|
*/
|
|
|
|
/* These definitions are for the RL78/G13, which the simulator
|
|
simulates. */
|
|
|
|
typedef unsigned char UQI __attribute__((mode(QI)));
|
|
typedef unsigned int UHI __attribute__((mode(HI)));
|
|
|
|
#define s8(x) (*(volatile UQI *)(x))
|
|
#define s16(x) (*(volatile UHI *)(x))
|
|
|
|
#define P(x) s8(0xfff00+(x))
|
|
#define PM(x) s8(0xfff20+(x))
|
|
|
|
#define PER0 s8(0xf00f0)
|
|
|
|
#define SSR00 s16(0xf0100)
|
|
#define SMR00 s16(0xf0110)
|
|
#define SCR00 s16(0xf0118)
|
|
#define SS0 s16(0xf0122)
|
|
#define SPS0 s16(0xf0126)
|
|
#define SO0 s16(0xf0128)
|
|
#define SOE0 s16(0xf012a)
|
|
#define SOL0 s16(0xf0134)
|
|
|
|
#define SDR00 s16(0xfff10)
|
|
|
|
static int initted = 0;
|
|
|
|
static void
|
|
init_uart0 ()
|
|
{
|
|
initted = 1;
|
|
|
|
PER0 = 0xff;
|
|
SPS0 = 0x0011; /* 16 MHz */
|
|
SMR00 = 0x0022; /* uart mode */
|
|
SCR00 = 0x8097; /* 8-N-1 */
|
|
SDR00 = 0x8a00; /* baud in MSB - 115200 */
|
|
SOL0 = 0x0000; /* not inverted */
|
|
SO0 = 0x000f; /* initial value */
|
|
SOE0 = 0x0001; /* enable TxD0 */
|
|
P(1) |= 0b00000100;
|
|
PM(1) &= 0b11111011;
|
|
SS0 = 0x0001;
|
|
}
|
|
|
|
static void
|
|
tputc (char c)
|
|
{
|
|
/* Wait for transmit buffer to be empty. */
|
|
while (SSR00 & 0x0020)
|
|
asm("");
|
|
/* Transmit that byte. */
|
|
SDR00 = c;
|
|
}
|
|
|
|
/* defaults to 0 unless open() is linked in */
|
|
int _open_present;
|
|
|
|
int
|
|
_write(int fd, char *ptr, int len)
|
|
{
|
|
int rv = len;
|
|
|
|
if (_open_present && fd > 2)
|
|
return _SYS_write (fd, ptr, len);
|
|
|
|
if (!initted)
|
|
init_uart0 ();
|
|
|
|
while (len != 0)
|
|
{
|
|
tputc (*ptr);
|
|
ptr ++;
|
|
len --;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
char * write (int) __attribute__((weak, alias ("_write")));
|