mirror of
https://github.com/fail0verflow/switch-coreboot.git
synced 2025-05-04 01:39:18 -04:00
ac309da3d9
Signed-off-by: Marc Jones <marc.jones@amd.com> Acked-by: Peter Stuge <peter@stuge.se> git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@550 f3766cd6-281f-0410-b1cd-43a5c92072e9
119 lines
2.8 KiB
C
119 lines
2.8 KiB
C
#include <types.h>
|
|
#include <cpu.h>
|
|
#include <console.h>
|
|
#include <uart8250.h>
|
|
#include <stdarg.h>
|
|
|
|
int vtxprintf(void (*)(unsigned char, void *arg),
|
|
void *arg, const char *, va_list);
|
|
|
|
static int console_loglevel(void)
|
|
{
|
|
return CONFIG_DEFAULT_CONSOLE_LOGLEVEL;
|
|
}
|
|
|
|
void console_tx_byte(unsigned char byte, void *arg)
|
|
{
|
|
if (byte == '\n') {
|
|
uart8250_tx_byte(TTYSx_BASE, '\r');
|
|
#if defined(CONFIG_CONSOLE_PREFIX) && (CONFIG_CONSOLE_PREFIX == 1)
|
|
uart8250_tx_byte(TTYSx_BASE, '\n');
|
|
uart8250_tx_byte(TTYSx_BASE, '(');
|
|
uart8250_tx_byte(TTYSx_BASE, 'L');
|
|
uart8250_tx_byte(TTYSx_BASE, 'B');
|
|
uart8250_tx_byte(TTYSx_BASE, ')');
|
|
uart8250_tx_byte(TTYSx_BASE, ' ');
|
|
return;
|
|
#endif
|
|
}
|
|
|
|
uart8250_tx_byte(TTYSx_BASE, byte);
|
|
}
|
|
|
|
int printk(int msg_level, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int i;
|
|
|
|
if (msg_level > console_loglevel()) {
|
|
return 0;
|
|
}
|
|
|
|
va_start(args, fmt);
|
|
i = vtxprintf(console_tx_byte, (void *)0, fmt, args);
|
|
va_end(args);
|
|
|
|
return i;
|
|
}
|
|
|
|
/**
|
|
* Print a nice banner so we know what step we died on.
|
|
*
|
|
* @param level The printk level (e.g. BIOS_EMERG)
|
|
* @param s String to put in the middle of the banner
|
|
*/
|
|
|
|
void banner(int level, const char *s)
|
|
{
|
|
int i;
|
|
/* 10 = signs and a space. */
|
|
printk(level, "========== ");
|
|
for(i = 11; *s; i++, s++)
|
|
printk(level, "%c", *s);
|
|
/* trailing space */
|
|
printk(level, " ");
|
|
i++;
|
|
/* fill it up to 80 columns */
|
|
for(; i < 80; i++)
|
|
printk(level, "=");
|
|
printk(level, "\n");
|
|
}
|
|
|
|
void console_init(void)
|
|
{
|
|
static const char console_test[] =
|
|
"\n\nLinuxBIOS-"
|
|
LINUXBIOS_VERSION
|
|
LINUXBIOS_EXTRA_VERSION
|
|
" "
|
|
LINUXBIOS_BUILD
|
|
" starting...\n";
|
|
|
|
printk(BIOS_INFO, console_test);
|
|
}
|
|
|
|
/**
|
|
* Halt and loop due to a fatal error.
|
|
* There have been several iterations of this function.
|
|
* The first simply did a hlt(). Doing a hlt() can make jtag debugging
|
|
* very difficult as one can not break into a hlt instruction on some CPUs.
|
|
* Second was to do a console_tx_byte of a NULL character.
|
|
* A number of concerns were raised about doing this idea.
|
|
* Third idea was to do an inb from port 0x80, the POST port. That design
|
|
* makes us very CPU-specific.
|
|
* The fourth idea was just POSTING the same
|
|
* code over and over. That would erase the most recent POST code,
|
|
* hindering diagnosis.
|
|
*
|
|
* For now, for lack of a better alternative,
|
|
* we will call console_tx_byte ten times and then halt.
|
|
* Some CPU JTAG debbuggers might have problems but it is the right thing
|
|
* to do. We call with a NULL since it will clear any FIFOs in the path and
|
|
* won't clutter up the output, since NULL doesn't print a visible character
|
|
* on most terminal emulators.
|
|
*
|
|
* @param str A string to print for the error
|
|
*
|
|
*/
|
|
void die(const char *str)
|
|
{
|
|
int i;
|
|
|
|
printk(BIOS_EMERG, str);
|
|
|
|
while (1) {
|
|
for (i = 0; i < 10; i++)
|
|
console_tx_byte(0, (void *)0);
|
|
hlt();
|
|
}
|
|
}
|