diff options
| author | Philip Oberfichtner <pro@denx.de> | 2024-08-02 11:25:35 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2024-09-03 09:12:00 -0600 |
| commit | 3eb7f46a3c40b59aa6f73c3937049421514cca34 (patch) | |
| tree | f889a15b0225c99d706562f58bfe02f191811b74 /arch/x86/cpu/mp_init.c | |
| parent | a70d991212c9684e09ed80ece69ce1ff7bfd9f08 (diff) | |
x86: provide mb() macro
Implement a x86 memory barrier mb(). Furthermore, remove the previously
used mfence() function, which does the same thing.
The mb() macro is now equivalent to Linux (v6.9):
linux/arch/x86/include/asm/barrier.h
Signed-off-by: Philip Oberfichtner <pro@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/cpu/mp_init.c')
| -rw-r--r-- | arch/x86/cpu/mp_init.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/cpu/mp_init.c b/arch/x86/cpu/mp_init.c index aa1f47d7227..e2e1849c065 100644 --- a/arch/x86/cpu/mp_init.c +++ b/arch/x86/cpu/mp_init.c @@ -164,12 +164,12 @@ static inline void barrier_wait(atomic_t *b) { while (atomic_read(b) == 0) asm("pause"); - mfence(); + mb(); } static inline void release_barrier(atomic_t *b) { - mfence(); + mb(); atomic_set(b, 1); } @@ -631,7 +631,7 @@ static int run_ap_work(struct mp_callback *callback, struct udevice *bsp, if (cur_cpu != i) store_callback(&ap_callbacks[i], callback); } - mfence(); + mb(); /* Wait for all the APs to signal back that call has been accepted. */ start = get_timer(0); @@ -656,7 +656,7 @@ static int run_ap_work(struct mp_callback *callback, struct udevice *bsp, } while (cpus_accepted != num_aps); /* Make sure we can see any data written by the APs */ - mfence(); + mb(); return 0; } @@ -692,7 +692,7 @@ static int ap_wait_for_instruction(struct udevice *cpu, void *unused) /* Copy to local variable before using the value */ memcpy(&lcb, cb, sizeof(lcb)); - mfence(); + mb(); if (lcb.logical_cpu_number == MP_SELECT_ALL || lcb.logical_cpu_number == MP_SELECT_APS || dev_seq(cpu) == lcb.logical_cpu_number) |