diff options
| author | Atish Patra <atish.patra@wdc.com> | 2019-01-19 00:35:47 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2019-01-22 07:33:49 +0300 |
| commit | 784a4657c0957e7f9561fd2d87930ba008643c1e (patch) | |
| tree | c8711726b76df9d32e82122870921f790c1c7c54 /lib | |
| parent | 1ee745fe57c3ad9db64bb31564f21a4fab101f22 (diff) | |
| download | opensbi-784a4657c0957e7f9561fd2d87930ba008643c1e.tar.xz | |
lib: Move software interrupt enablement from firmware to lib
The secondary hart waits for an IPI signal from the boot hart to
executing boot code (hot boot). As a result, software generated
interrupts have to be enabled for secondary harts before waiting for
the boot hart boot completion IPI signal.
Enabling software generated interrupts (IPI) can be done independently
of the firmware code and moved to libsbi code so that the different
firmware do not have to implement this.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/sbi_hart.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/sbi_hart.c b/lib/sbi_hart.c index e8a689e..e12a546 100644 --- a/lib/sbi_hart.c +++ b/lib/sbi_hart.c @@ -304,6 +304,10 @@ void sbi_hart_wait_for_coldboot(struct sbi_scratch *scratch, u32 hartid) if ((sbi_platform_hart_count(plat) <= hartid) || (COLDBOOT_WAIT_BITMAP_SIZE <= hartid)) sbi_hart_hang(); + + /* Set MSIE bit to receive IPI */ + csr_set(mie, MIP_MSIP); + do { spin_lock(&coldboot_wait_bitmap_lock); coldboot_wait_bitmap |= (1UL << hartid); |