diff options
| author | Lin Huang-Sen <r94922102@gmail.com> | 2018-12-29 00:58:06 +0800 |
|---|---|---|
| committer | Jerome Forissier <jerome.forissier@linaro.org> | 2019-01-07 11:11:16 +0100 |
| commit | 100a01d5ab7daf2b7bdc1bc064954aa68a434984 (patch) | |
| tree | 60b978378d29c35f61341b57d91e05e8b93eb293 | |
| parent | 275d9d31f0808778c3b970ae02a40db5d1083bfa (diff) | |
probe_max_it overwrite the value of GICD_ISENABLER
probe_max_it save the original value of GICD_ISENABLER
and write 0xffffffff into GICD_ISENABLER to probe
the largest interrupt number.
Instead of writing the original GICD_ISENABLER value
into GICD_ISENABLER, probe_max_it write the value into GICD_ICENABLER
and cause the original GICD_ISENABLER value bit flipping.
Signed-off-by: Lin Huang-Sen <r94922102@gmail.com>
Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
| -rw-r--r-- | core/drivers/gic.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/core/drivers/gic.c b/core/drivers/gic.c index ab335a63..9b4948c4 100644 --- a/core/drivers/gic.c +++ b/core/drivers/gic.c @@ -110,7 +110,7 @@ static size_t probe_max_it(vaddr_t gicc_base __maybe_unused, vaddr_t gicd_base) old_reg = read32(gicd_base + GICD_ISENABLER(i)); write32(0xffffffff, gicd_base + GICD_ISENABLER(i)); reg = read32(gicd_base + GICD_ISENABLER(i)); - write32(old_reg, gicd_base + GICD_ICENABLER(i)); + write32(~old_reg, gicd_base + GICD_ICENABLER(i)); for (b = NUM_INTS_PER_REG - 1; b >= 0; b--) { if (BIT32(b) & reg) { ret = i * NUM_INTS_PER_REG + b; |