mirror of https://gitee.com/openkylin/linux.git
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/*
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* Generic 16550 kgdb support intended to be useful on a variety
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* of platforms. To enable this support, it is necessary to set
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* the CONFIG_GEN550 option. Any virtual mapping of the serial
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* port(s) to be used can be accomplished by setting
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* ppc_md.early_serial_map to a platform-specific mapping function.
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*
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* Adapted from ppc4xx_kgdb.c.
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*
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* Author: Matt Porter <mporter@kernel.crashing.org>
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*
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* 2002-2004 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <asm/machdep.h>
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extern unsigned long serial_init(int, void *);
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extern unsigned long serial_getc(unsigned long);
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extern unsigned long serial_putc(unsigned long, unsigned char);
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#if defined(CONFIG_KGDB_TTYS0)
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#define KGDB_PORT 0
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#elif defined(CONFIG_KGDB_TTYS1)
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#define KGDB_PORT 1
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#elif defined(CONFIG_KGDB_TTYS2)
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#define KGDB_PORT 2
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#elif defined(CONFIG_KGDB_TTYS3)
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#define KGDB_PORT 3
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#else
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#error "invalid kgdb_tty port"
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#endif
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static volatile unsigned int kgdb_debugport;
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void putDebugChar(unsigned char c)
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{
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if (kgdb_debugport == 0)
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kgdb_debugport = serial_init(KGDB_PORT, NULL);
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serial_putc(kgdb_debugport, c);
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}
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int getDebugChar(void)
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{
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if (kgdb_debugport == 0)
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kgdb_debugport = serial_init(KGDB_PORT, NULL);
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return(serial_getc(kgdb_debugport));
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}
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void kgdb_interruptible(int enable)
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{
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return;
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}
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void putDebugString(char* str)
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{
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while (*str != '\0') {
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putDebugChar(*str);
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str++;
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}
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putDebugChar('\r');
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return;
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}
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/*
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* Note: gen550_init() must be called already on the port we are going
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* to use.
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*/
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void
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gen550_kgdb_map_scc(void)
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{
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printk(KERN_DEBUG "kgdb init\n");
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if (ppc_md.early_serial_map)
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ppc_md.early_serial_map();
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kgdb_debugport = serial_init(KGDB_PORT, NULL);
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}
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