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src/console: Add x86 romstage spinlock option and printk spinlock support

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This paves the way for AP printk spinlock on AMD platforms

Change-Id: Ice42a0d3177736bf6e1bc601092e413601866f20
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: https://review.coreboot.org/11958
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Timothy Pearson
2015-05-18 16:04:10 -05:00
committed by Martin Roth
parent a09bb426d4
commit 44d5342835
4 changed files with 33 additions and 1 deletions
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15
src/console/printk.c
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@ -2,6 +2,7 @@
* blatantly copied from linux/kernel/printk.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
*
*/
@ -13,7 +14,9 @@
#include <stddef.h>
#include <trace.h>
#if (!defined(__PRE_RAM__) && IS_ENABLED(CONFIG_HAVE_ROMSTAGE_CONSOLE_SPINLOCK)) || !IS_ENABLED(CONFIG_HAVE_ROMSTAGE_CONSOLE_SPINLOCK)
DECLARE_SPIN_LOCK(console_lock)
#endif
void do_putchar(unsigned char byte)
{
@ -39,7 +42,13 @@ int do_printk(int msg_level, const char *fmt, ...)
#endif
DISABLE_TRACE;
#ifdef __PRE_RAM__
#if IS_ENABLED(CONFIG_HAVE_ROMSTAGE_CONSOLE_SPINLOCK)
spin_lock(romstage_console_lock());
#endif
#else
spin_lock(&console_lock);
#endif
va_start(args, fmt);
i = vtxprintf(wrap_putchar, fmt, args, NULL);
@ -47,7 +56,13 @@ int do_printk(int msg_level, const char *fmt, ...)
console_tx_flush();
#ifdef __PRE_RAM__
#if IS_ENABLED(CONFIG_HAVE_ROMSTAGE_CONSOLE_SPINLOCK)
spin_unlock(romstage_console_lock());
#endif
#else
spin_unlock(&console_lock);
#endif
ENABLE_TRACE;
return i;