blob: e5762083fca29445adab217759890b1c46bbf39a [file] [log] [blame]
/*
* Copyright (c) 2008 Travis Geiselbrecht
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdarg.h>
#include <reg.h>
#include <debug.h>
#include <printf.h>
#include <kernel/thread.h>
#include <platform/debug.h>
#include <arch/ops.h>
#include <platform/omap5912.h>
static void write_uart_reg(int uart, int reg, unsigned char data)
{
unsigned long base;
int mul = 4;
switch(uart) {
case 0: base = UART0_BASE; break;
case 1: base = UART1_BASE; break;
case 2: base = UART2_BASE; break;
default: return;
}
*(volatile unsigned char *)(base + reg * mul) = data;
}
static unsigned char read_uart_reg(int uart, int reg)
{
unsigned long base;
int mul = 4;
switch(uart) {
case 0: base = UART0_BASE; break;
case 1: base = UART1_BASE; break;
case 2: base = UART2_BASE; break;
default: return 0;
}
return *(volatile unsigned char *)(base + reg * mul);
}
static int uart_init(void)
{
/* clear the tx & rx fifo and disable */
write_uart_reg(0, UART_FCR, 0x6);
return 0;
}
static int uart_putc(int port, char c )
{
while (!(read_uart_reg(port, UART_LSR) & (1<<6))) // wait for the shift register to empty
;
write_uart_reg(port, UART_THR, c);
return 0;
}
static int uart_getc(int port, bool wait) /* returns -1 if no data available */
{
if (wait) {
while (!(read_uart_reg(port, UART_LSR) & (1<<0))) // wait for data to show up in the rx fifo
;
} else {
if (!(read_uart_reg(port, UART_LSR) & (1<<0)))
return -1;
}
return read_uart_reg(port, UART_RHR);
}
void _dputc(char c)
{
if (c == '\n')
uart_putc(0, '\r');
uart_putc(0, c);
}
int dgetc(char *c, bool wait)
{
int _c;
while ((_c = uart_getc(0, false)) < 0) {
if (!wait) {
return -1;
}
}
*c = _c;
return 0;
}
void debug_dump_regs(void)
{
PANIC_UNIMPLEMENTED;
}
void platform_halt(void)
{
dprintf(ALWAYS, "HALT: spinning forever...\n");
for(;;);
}
void debug_dump_memory_bytes(void *mem, int len)
{
PANIC_UNIMPLEMENTED;
}
void debug_dump_memory_halfwords(void *mem, int len)
{
PANIC_UNIMPLEMENTED;
}
void debug_dump_memory_words(void *mem, int len)
{
PANIC_UNIMPLEMENTED;
}
void debug_set_trace_level(int trace_type, int level)
{
PANIC_UNIMPLEMENTED;
}
uint32_t debug_cycle_count(void)
{
// PANIC_UNIMPLEMENTED;
return 0;
}