From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/sparc/prom/printf.c | 69 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 kernel/arch/sparc/prom/printf.c (limited to 'kernel/arch/sparc/prom/printf.c') diff --git a/kernel/arch/sparc/prom/printf.c b/kernel/arch/sparc/prom/printf.c new file mode 100644 index 000000000..d9682f06b --- /dev/null +++ b/kernel/arch/sparc/prom/printf.c @@ -0,0 +1,69 @@ +/* + * 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 +#include +#include + +#include +#include + +#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); +} -- cgit 1.2.3-korg