b012bc94ac
This command is useful to allow to observe messages generated by coreboot and u-boot until present. In particular it is handy when u-boot is instrumented to fall through into console mode on startup errors. Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/*
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* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
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*
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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; version 2 of the License.
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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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#include <common.h>
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#ifndef CONFIG_SYS_COREBOOT
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#error This driver requires coreboot
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#endif
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#include <asm/arch/sysinfo.h>
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struct cbmem_console {
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u32 buffer_size;
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u32 buffer_cursor;
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u8 buffer_body[0];
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} __attribute__ ((__packed__));
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static struct cbmem_console *cbmem_console_p;
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void cbmemc_putc(char data)
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{
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int cursor;
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cursor = cbmem_console_p->buffer_cursor++;
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if (cursor < cbmem_console_p->buffer_size)
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cbmem_console_p->buffer_body[cursor] = data;
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}
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void cbmemc_puts(const char *str)
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{
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char c;
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while ((c = *str++) != 0)
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cbmemc_putc(c);
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}
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int cbmemc_init(void)
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{
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int rc;
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struct stdio_dev cons_dev;
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cbmem_console_p = lib_sysinfo.cbmem_cons;
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memset(&cons_dev, 0, sizeof(cons_dev));
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strcpy(cons_dev.name, "cbmem");
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cons_dev.flags = DEV_FLAGS_OUTPUT; /* Output only */
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cons_dev.putc = cbmemc_putc;
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cons_dev.puts = cbmemc_puts;
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rc = stdio_register(&cons_dev);
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return (rc == 0) ? 1 : rc;
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}
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