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03de305ec4
As part of bringing the master branch back in to next, we need to allow for all of these changes to exist here. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
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*/
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#include <console.h>
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#include <linux/string.h>
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#include <asm/cb_sysinfo.h>
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void cbmemc_putc(struct stdio_dev *dev, char data)
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{
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const struct sysinfo_t *sysinfo = cb_get_sysinfo();
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struct cbmem_console *cons;
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uint pos, flags;
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if (!sysinfo)
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return;
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cons = sysinfo->cbmem_cons;
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if (!cons)
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return;
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pos = cons->cursor & CBMC_CURSOR_MASK;
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/* preserve the overflow flag if present */
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flags = cons->cursor & ~CBMC_CURSOR_MASK;
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cons->body[pos++] = data;
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/*
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* Deal with overflow - the flag may be cleared by another program which
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* reads the buffer out later, e.g. Linux
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*/
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if (pos >= cons->size) {
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pos = 0;
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flags |= CBMC_OVERFLOW;
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}
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cons->cursor = flags | pos;
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}
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void cbmemc_puts(struct stdio_dev *dev, 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(dev, 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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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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