diff options
| author | Luc MICHEL <luc.michel@git.antfield.fr> | 2018-01-25 11:45:30 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-01-25 11:45:30 +0000 |
| commit | 421a3c224e2c4c5d2dfd9309d7357f3369ed30e0 (patch) | |
| tree | b147668c555cee7329363a38823578945e29e7ad /hw | |
| parent | fc05a6f22a15503b1e95be640a62e44a06c95d25 (diff) | |
hw/intc/arm_gic: Fix the NS view of C_BPR when C_CTRL.CBPR is 1
When C_CTRL.CBPR is 1, the Non-Secure view of C_BPR is altered:
- A Non-Secure read of C_BPR should return the BPR value plus 1,
saturated to 7,
- A Non-Secure write should be ignored.
Signed-off-by: Luc MICHEL <luc.michel@git.antfield.fr>
Message-id: 20180119145756.7629-6-luc.michel@greensocs.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: fixed comment typo]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/intc/arm_gic.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/hw/intc/arm_gic.c b/hw/intc/arm_gic.c index b7989d267f..724bc9fa61 100644 --- a/hw/intc/arm_gic.c +++ b/hw/intc/arm_gic.c @@ -1212,8 +1212,13 @@ static MemTxResult gic_cpu_read(GICState *s, int cpu, int offset, break; case 0x08: /* Binary Point */ if (s->security_extn && !attrs.secure) { - /* BPR is banked. Non-secure copy stored in ABPR. */ - *data = s->abpr[cpu]; + if (s->cpu_ctlr[cpu] & GICC_CTLR_CBPR) { + /* NS view of BPR when CBPR is 1 */ + *data = MIN(s->bpr[cpu] + 1, 7); + } else { + /* BPR is banked. Non-secure copy stored in ABPR. */ + *data = s->abpr[cpu]; + } } else { *data = s->bpr[cpu]; } @@ -1286,7 +1291,12 @@ static MemTxResult gic_cpu_write(GICState *s, int cpu, int offset, break; case 0x08: /* Binary Point */ if (s->security_extn && !attrs.secure) { - s->abpr[cpu] = MAX(value & 0x7, GIC_MIN_ABPR); + if (s->cpu_ctlr[cpu] & GICC_CTLR_CBPR) { + /* WI when CBPR is 1 */ + return MEMTX_OK; + } else { + s->abpr[cpu] = MAX(value & 0x7, GIC_MIN_ABPR); + } } else { s->bpr[cpu] = MAX(value & 0x7, GIC_MIN_BPR); } |