diff options
| author | Atish Patra <atish.patra@wdc.com> | 2020-02-12 04:32:36 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2020-02-24 15:34:23 +0300 |
| commit | f64f4b92e411709227ee830bc1e9f8f87c72423e (patch) | |
| tree | 72972065bc6aa528d701884a5df2b41ecbb7857d /include/sbi/sbi_platform.h | |
| parent | ac5e821d50be631f26274765a59bc1b444ffd862 (diff) | |
| download | opensbi-f64f4b92e411709227ee830bc1e9f8f87c72423e.tar.xz | |
lib: Add a new platform feature to bringup secondary harts
A platform may have a specific method to bring-up secondary harts for the
first time but may rely on generic WFI based approach for hart hotplug in
absence of a platform specific hart hotplug method.
Define a platform feature flag for such platforms. The platform needs to
implement platform specific bring-up method in hart_start and not define
hart_stop method in this case. They must only define
SBI_PLATFORM_HAS_HART_SECONDARY_BOOT.
SBI_PLATFORM_HAS_HART_HOTPLUG should only be defined when the platform
intend to support both hart_start and hart_stop and do not intend to rely
on generic WFI based approach.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'include/sbi/sbi_platform.h')
| -rw-r--r-- | include/sbi/sbi_platform.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sbi/sbi_platform.h b/include/sbi/sbi_platform.h index ba1d95f..16ee05c 100644 --- a/include/sbi/sbi_platform.h +++ b/include/sbi/sbi_platform.h @@ -59,6 +59,8 @@ enum sbi_platform_features { SBI_PLATFORM_HAS_MCOUNTEREN = (1 << 4), /** Platform has fault delegation support */ SBI_PLATFORM_HAS_MFAULTS_DELEGATION = (1 << 5), + /** Platform has custom secondary hart booting support */ + SBI_PLATFORM_HAS_HART_SECONDARY_BOOT = (1 << 6), }; /** Default feature set for a platform */ @@ -204,6 +206,9 @@ struct sbi_platform { /** Check whether the platform supports fault delegation */ #define sbi_platform_has_mfaults_delegation(__p) \ ((__p)->features & SBI_PLATFORM_HAS_MFAULTS_DELEGATION) +/** Check whether the platform supports custom secondary hart booting support */ +#define sbi_platform_has_hart_secondary_boot(__p) \ + ((__p)->features & SBI_PLATFORM_HAS_HART_SECONDARY_BOOT) /** * Get name of the platform |