mirror of
https://github.com/fail0verflow/switch-coreboot.git
synced 2025-05-04 01:39:18 -04:00
5d11489d74
Tested on Qemu and Geode LX. Benefits of this patch: - printk() now works directly after printk_buffer_init(), even before the serial port is set up. - If all you want is a log, you don't have to bother with serial output. - A payload can read and analyze the log. - You can build on this and buffer log until serial is available, then flush the messages buffered so far. The printk buffer is configurable with a default-on Kconfig variable. If you want to dump the buffer from the Qemu monitor after CAR has been disabled, use this command: memsave 0x90000 65536 memdump.bin Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Peter Stuge <peter@stuge.se> Acked-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Marc Jones <marc.jones@amd.com> git-svn-id: svn://coreboot.org/repository/coreboot-v3@590 f3766cd6-281f-0410-b1cd-43a5c92072e9
67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef CONSOLE_H
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#define CONSOLE_H
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#include <types.h>
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#include <shared.h> /* We share symbols from stage 0 */
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#include <post_code.h>
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#define BIOS_EMERG 0 /* system is unusable */
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#define BIOS_ALERT 1 /* action must be taken immediately */
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#define BIOS_CRIT 2 /* critical conditions */
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#define BIOS_ERR 3 /* error conditions */
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#define BIOS_WARNING 4 /* warning conditions */
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#define BIOS_NOTICE 5 /* normal but significant condition */
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#define BIOS_INFO 6 /* informational */
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#define BIOS_DEBUG 7 /* debug-level messages */
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#define BIOS_SPEW 8 /* Way too many details */
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void console_init(void);
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void console_tx_byte(unsigned char byte, void *arg);
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void console_tx_flush(void);
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unsigned char console_rx_byte(void);
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int console_tst_byte(void);
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void die(const char *msg);
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#ifdef CONFIG_CONSOLE_BUFFER
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void printk_buffer_init(void);
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void printk_buffer_move(void *newaddr, int newsize);
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#endif
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struct console_driver {
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void (*init)(void);
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void (*tx_byte)(unsigned char byte, void *arg);
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void (*tx_flush)(void);
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unsigned char (*rx_byte)(void);
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int (*tst_byte)(void);
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};
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#ifdef CONFIG_CONSOLE_BUFFER
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struct printk_buffer {
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int len;
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int readoffset;
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int writeoffset;
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char buffer[];
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};
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#endif
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SHARED_WITH_ATTRIBUTES(printk, int, __attribute__((format (printf, 2, 3))),
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int msg_level, const char *fmt, ...);
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SHARED(banner, void, int msg_level, const char *msg);
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SHARED(dump_mem_range, void, int msg_level, unsigned char *buf, int size);
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#endif /* CONSOLE_H */
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