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https://github.com/edk2-porting/linux-next.git
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6496a5c9e7
hvc_alloc() may fail, if so exit from init() with error. Signed-off-by: Vasiliy Kulikov <segooon@gmail.com> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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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, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*
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* Tilera TILE Processor hypervisor console
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*/
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/moduleparam.h>
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#include <linux/types.h>
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#include <hv/hypervisor.h>
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#include "hvc_console.h"
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static int hvc_tile_put_chars(uint32_t vt, const char *buf, int count)
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{
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return hv_console_write((HV_VirtAddr)buf, count);
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}
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static int hvc_tile_get_chars(uint32_t vt, char *buf, int count)
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{
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int i, c;
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for (i = 0; i < count; ++i) {
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c = hv_console_read_if_ready();
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if (c < 0)
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break;
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buf[i] = c;
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}
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return i;
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}
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static const struct hv_ops hvc_tile_get_put_ops = {
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.get_chars = hvc_tile_get_chars,
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.put_chars = hvc_tile_put_chars,
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};
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static int __init hvc_tile_console_init(void)
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{
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extern void disable_early_printk(void);
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hvc_instantiate(0, 0, &hvc_tile_get_put_ops);
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add_preferred_console("hvc", 0, NULL);
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disable_early_printk();
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return 0;
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}
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console_initcall(hvc_tile_console_init);
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static int __init hvc_tile_init(void)
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{
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struct hvc_struct *s;
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s = hvc_alloc(0, 0, &hvc_tile_get_put_ops, 128);
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return IS_ERR(s) ? PTR_ERR(s) : 0;
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}
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device_initcall(hvc_tile_init);
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