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| author | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2015-05-18 16:04:10 -0500 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2015-12-15 16:41:13 +0100 |
| commit | 44d53428352ff5d6c8941160429735b5465add5f (patch) | |
| tree | 8b902553c7a507fd8ad303e45a19b70b1887eed1 /src | |
| parent | a09bb426d4149506c8cc588704cb5d8136f9c3f9 (diff) | |
| download | coreboot-44d53428352ff5d6c8941160429735b5465add5f.tar.xz | |
src/console: Add x86 romstage spinlock option and printk spinlock support
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>
Diffstat (limited to 'src')
| -rw-r--r-- | src/Kconfig | 4 | ||||
| -rw-r--r-- | src/arch/x86/include/arch/smp/spinlock.h | 11 | ||||
| -rw-r--r-- | src/console/printk.c | 15 | ||||
| -rw-r--r-- | src/cpu/amd/car/post_cache_as_ram.c | 4 |
4 files changed, 33 insertions, 1 deletions
diff --git a/src/Kconfig b/src/Kconfig index 818eb59c8b..46349c5f99 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -476,6 +476,10 @@ config HAVE_HARD_RESET This variable specifies whether a given board has a hard_reset function, no matter if it's provided by board code or chipset code. +config HAVE_ROMSTAGE_CONSOLE_SPINLOCK + bool + default n + config HAVE_MONOTONIC_TIMER def_bool n help diff --git a/src/arch/x86/include/arch/smp/spinlock.h b/src/arch/x86/include/arch/smp/spinlock.h index 32be2f25fb..74e532c68a 100644 --- a/src/arch/x86/include/arch/smp/spinlock.h +++ b/src/arch/x86/include/arch/smp/spinlock.h @@ -1,7 +1,7 @@ #ifndef ARCH_SMP_SPINLOCK_H #define ARCH_SMP_SPINLOCK_H -#ifndef __PRE_RAM__ +#if !defined(__PRE_RAM__) || IS_ENABLED(CONFIG_HAVE_ROMSTAGE_CONSOLE_SPINLOCK) /* * Your basic SMP spinlocks, allowing only a single CPU anywhere @@ -11,9 +11,18 @@ typedef struct { volatile unsigned int lock; } spinlock_t; +#ifdef __PRE_RAM__ +spinlock_t *romstage_console_lock(void); +void initialize_romstage_console_lock(void); +#endif #define SPIN_LOCK_UNLOCKED (spinlock_t) { 1 } + +#ifndef __PRE_RAM__ #define DECLARE_SPIN_LOCK(x) static spinlock_t x = SPIN_LOCK_UNLOCKED; +#else +#define DECLARE_SPIN_LOCK(x) +#endif /* * Simple spin lock operations. There are two variants, one clears IRQ's diff --git a/src/console/printk.c b/src/console/printk.c index aab7ff5f67..99f90a8e28 100644 --- a/src/console/printk.c +++ b/src/console/printk.c @@ -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; diff --git a/src/cpu/amd/car/post_cache_as_ram.c b/src/cpu/amd/car/post_cache_as_ram.c index fb09cd41dd..8c5757e209 100644 --- a/src/cpu/amd/car/post_cache_as_ram.c +++ b/src/cpu/amd/car/post_cache_as_ram.c @@ -76,6 +76,10 @@ static void prepare_ramstage_region(void *resume_backup_memory) memset_((void*)0, 0, CONFIG_RAMTOP - backup_top); } +#if IS_ENABLED(CONFIG_HAVE_ROMSTAGE_CONSOLE_SPINLOCK) + initialize_romstage_console_lock(); +#endif + print_car_debug(" Done\n"); } |