threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* printf.c: Internal prom library printf facility.
|
|
*
|
|
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
* Copyright (c) 2002 Pete Zaitcev (zaitcev@yahoo.com)
|
|
*
|
|
* We used to warn all over the code: DO NOT USE prom_printf(),
|
|
* and yet people do. Anton's banking code was outputting banks
|
|
* with prom_printf for most of the 2.4 lifetime. Since an effective
|
|
* stick is not available, we deployed a carrot: an early printk
|
|
* through PROM by means of -p boot option. This ought to fix it.
|
|
* USE printk; if you need, deploy -p.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <asm/openprom.h>
|
|
#include <asm/oplib.h>
|
|
|
|
#define CONSOLE_WRITE_BUF_SIZE 1024
|
|
|
|
static char ppbuf[1024];
|
|
static char console_write_buf[CONSOLE_WRITE_BUF_SIZE];
|
|
static DEFINE_RAW_SPINLOCK(console_write_lock);
|
|
|
|
void notrace prom_write(const char *buf, unsigned int n)
|
|
{
|
|
unsigned int dest_len;
|
|
unsigned long flags;
|
|
char *dest;
|
|
|
|
dest = console_write_buf;
|
|
raw_spin_lock_irqsave(&console_write_lock, flags);
|
|
|
|
dest_len = 0;
|
|
while (n-- != 0) {
|
|
char ch = *buf++;
|
|
if (ch == '\n') {
|
|
*dest++ = '\r';
|
|
dest_len++;
|
|
}
|
|
*dest++ = ch;
|
|
dest_len++;
|
|
if (dest_len >= CONSOLE_WRITE_BUF_SIZE - 1) {
|
|
prom_console_write_buf(console_write_buf, dest_len);
|
|
dest = console_write_buf;
|
|
dest_len = 0;
|
|
}
|
|
}
|
|
if (dest_len)
|
|
prom_console_write_buf(console_write_buf, dest_len);
|
|
|
|
raw_spin_unlock_irqrestore(&console_write_lock, flags);
|
|
}
|
|
|
|
void notrace prom_printf(const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int i;
|
|
|
|
va_start(args, fmt);
|
|
i = vscnprintf(ppbuf, sizeof(ppbuf), fmt, args);
|
|
va_end(args);
|
|
|
|
prom_write(ppbuf, i);
|
|
}
|