5638456d16
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@545 f3766cd6-281f-0410-b1cd-43a5c92072e9
112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
#include <types.h>
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#include <cpu.h>
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#include <console.h>
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#include <uart8250.h>
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#include <stdarg.h>
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int vtxprintf(void (*)(unsigned char, void *arg),
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void *arg, const char *, va_list);
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static int console_loglevel(void)
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{
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return CONFIG_DEFAULT_CONSOLE_LOGLEVEL;
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}
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void console_tx_byte(unsigned char byte, void *arg)
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{
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if (byte == '\n') {
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uart8250_tx_byte(TTYSx_BASE, '\r');
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#if defined(CONFIG_CONSOLE_PREFIX) && (CONFIG_CONSOLE_PREFIX == 1)
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uart8250_tx_byte(TTYSx_BASE, '\n');
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uart8250_tx_byte(TTYSx_BASE, '(');
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uart8250_tx_byte(TTYSx_BASE, 'L');
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uart8250_tx_byte(TTYSx_BASE, 'B');
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uart8250_tx_byte(TTYSx_BASE, ')');
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uart8250_tx_byte(TTYSx_BASE, ' ');
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return;
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#endif
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}
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uart8250_tx_byte(TTYSx_BASE, byte);
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}
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int printk(int msg_level, const char *fmt, ...)
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{
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va_list args;
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int i;
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if (msg_level > console_loglevel()) {
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return 0;
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}
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va_start(args, fmt);
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i = vtxprintf(console_tx_byte, (void *)0, fmt, args);
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va_end(args);
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return i;
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}
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/**
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* Print a nice banner so we know what step we died on.
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*
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* @param level The printk level (e.g. BIOS_EMERG)
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* @param s String to put in the middle of the banner
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*/
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void banner(int level, const char *s)
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{
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int i;
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/* 10 = signs and a space. */
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printk(level, "========== ");
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for(i = 11; *s; i++, s++)
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printk(level, "%c", *s);
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/* trailing space */
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printk(level, " ");
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i++;
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/* fill it up to 80 columns */
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for(; i < 80; i++)
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printk(level, "=");
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printk(level, "\n");
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}
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void console_init(void)
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{
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static const char console_test[] =
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"\n\nLinuxBIOS-"
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LINUXBIOS_VERSION
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LINUXBIOS_EXTRA_VERSION
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" "
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LINUXBIOS_BUILD
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" starting...\n";
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printk(BIOS_INFO, console_test);
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}
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/**
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* Halt and loop due to a fatal error.
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* There have been several iterations of this function.
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* The first simply did a hlt(). Doing a hlt() can make jtag debugging
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* very difficult as one can not break into a hlt instruction on some CPUs.
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* Second was to do a console_tx_byte of a NULL character.
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* A number of concerns were raised about doing this idea.
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* Third idea was to do an inb from port 0x80, the POST port. That design
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* makes us very CPU-specific.
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* The fourth idea was just POSTING the same
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* code over and over. That would erase the most recent POST code,
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* hindering diagnosis.
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*
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* For now, for lack of a good alternative,
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* we will continue to call console_tx_byte. We call with a NULL since
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* it will clear any FIFOs in the path and won't clutter up the output,
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* since NULL doesn't print a visible character on most terminal
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* emulators.
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*
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* @param str A string to print for the error
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*
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*/
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void die(const char *str)
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{
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printk(BIOS_EMERG, str);
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while (1)
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console_tx_byte(0, (void *)0);
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}
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