mirror of https://gitee.com/openkylin/linux.git
133 lines
2.4 KiB
C
133 lines
2.4 KiB
C
/*
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* polling mode stateless debugging stuff, originally for NS16550 Serial Ports
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*
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* c 2001 PPC 64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <stdarg.h>
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#define WANT_PPCDBG_TAB /* Only defined here */
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#include <linux/config.h>
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#include <linux/types.h>
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#include <asm/ppcdebug.h>
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#include <asm/processor.h>
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#include <asm/uaccess.h>
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#include <asm/machdep.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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void udbg_puts(const char *s)
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{
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if (ppc_md.udbg_putc) {
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char c;
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if (s && *s != '\0') {
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while ((c = *s++) != '\0')
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ppc_md.udbg_putc(c);
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}
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}
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#if 0
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else {
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printk("%s", s);
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}
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#endif
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}
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int udbg_write(const char *s, int n)
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{
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int remain = n;
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char c;
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if (!ppc_md.udbg_putc)
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return 0;
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if (s && *s != '\0') {
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while (((c = *s++) != '\0') && (remain-- > 0)) {
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ppc_md.udbg_putc(c);
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}
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}
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return n - remain;
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}
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int udbg_read(char *buf, int buflen)
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{
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char c, *p = buf;
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int i;
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if (!ppc_md.udbg_getc)
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return 0;
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for (i = 0; i < buflen; ++i) {
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do {
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c = ppc_md.udbg_getc();
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} while (c == 0x11 || c == 0x13);
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if (c == 0)
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break;
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*p++ = c;
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}
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return i;
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}
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void udbg_console_write(struct console *con, const char *s, unsigned int n)
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{
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udbg_write(s, n);
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}
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#define UDBG_BUFSIZE 256
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void udbg_printf(const char *fmt, ...)
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{
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unsigned char buf[UDBG_BUFSIZE];
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va_list args;
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va_start(args, fmt);
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vsnprintf(buf, UDBG_BUFSIZE, fmt, args);
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udbg_puts(buf);
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va_end(args);
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}
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/* Special print used by PPCDBG() macro */
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void udbg_ppcdbg(unsigned long debug_flags, const char *fmt, ...)
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{
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unsigned long active_debugs = debug_flags & ppc64_debug_switch;
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if (active_debugs) {
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va_list ap;
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unsigned char buf[UDBG_BUFSIZE];
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unsigned long i, len = 0;
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for (i=0; i < PPCDBG_NUM_FLAGS; i++) {
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if (((1U << i) & active_debugs) &&
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trace_names[i]) {
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len += strlen(trace_names[i]);
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udbg_puts(trace_names[i]);
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break;
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}
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}
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snprintf(buf, UDBG_BUFSIZE, " [%s]: ", current->comm);
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len += strlen(buf);
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udbg_puts(buf);
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while (len < 18) {
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udbg_puts(" ");
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len++;
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}
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va_start(ap, fmt);
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vsnprintf(buf, UDBG_BUFSIZE, fmt, ap);
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udbg_puts(buf);
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va_end(ap);
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}
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}
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unsigned long udbg_ifdebug(unsigned long flags)
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{
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return (flags & ppc64_debug_switch);
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}
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