diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2014-09-17 11:51:41 -0500 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-03-28 07:05:12 +0100 |
| commit | 74ff69feefaf3a34ad458ee641c68e1b62edd8f5 (patch) | |
| tree | f9f75205ff53da63ee4299eb16200d6f2425e9af /src/arch | |
| parent | cf5b627725bbbe9da5156f334ca00859a6ebde94 (diff) | |
arm64: add cpu_is_bsp() concept
It's helpful to know if the current running CPU
is the BSP. Therefore, provide that semantic.
BUG=chrome-os-partner:32082
BRANCH=None
TEST=Built and booted to kernel.
Change-Id: I18cb8ab5149c3337e22b1f6046b1af266be7e47c
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: b390dc70b658c207cd3b64408713ec4cddab3172
Original-Change-Id: I3d5518d1f6d6a78b14f25bb7ef79727605064561
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/218653
Original-Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/9083
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/arm64/c_entry.c | 1 | ||||
| -rw-r--r-- | src/arch/arm64/cpu.c | 1 | ||||
| -rw-r--r-- | src/arch/arm64/include/armv8/arch/cpu.h | 13 |
3 files changed, 15 insertions, 0 deletions
diff --git a/src/arch/arm64/c_entry.c b/src/arch/arm64/c_entry.c index 4e5c1510c0..f4a9848ee1 100644 --- a/src/arch/arm64/c_entry.c +++ b/src/arch/arm64/c_entry.c @@ -56,6 +56,7 @@ static void seed_stack(void) void arm64_init(void) { + cpu_set_bsp(); seed_stack(); arm64_soc_init(); main(); diff --git a/src/arch/arm64/cpu.c b/src/arch/arm64/cpu.c index c0dc3c3fa2..a263e1b873 100644 --- a/src/arch/arm64/cpu.c +++ b/src/arch/arm64/cpu.c @@ -27,6 +27,7 @@ #include "cpu-internal.h" static struct cpu_info cpu_infos[CONFIG_MAX_CPUS]; +struct cpu_info *bsp_cpu_info; static inline struct cpu_info *cpu_info_for_cpu(unsigned int id) { diff --git a/src/arch/arm64/include/armv8/arch/cpu.h b/src/arch/arm64/include/armv8/arch/cpu.h index d2623857aa..8d071adc61 100644 --- a/src/arch/arm64/include/armv8/arch/cpu.h +++ b/src/arch/arm64/include/armv8/arch/cpu.h @@ -66,6 +66,19 @@ struct cpu_info { /* Obtain cpu_info for current executing CPU. */ struct cpu_info *cpu_info(void); +extern struct cpu_info *bsp_cpu_info; + +/* Ran only by BSP at initial boot strapping. */ +static inline void cpu_set_bsp(void) +{ + bsp_cpu_info = cpu_info(); +} + +static inline int cpu_is_bsp(void) +{ + return cpu_info() == bsp_cpu_info; +} + /* Control routines for starting CPUs. */ struct cpu_control_ops { /* Return the maximum number of CPUs supported. */ |