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Subject[PATCH 2/3] MIPS: smp-cps: Clear Status IPL field when using EIC
Date
When using an external interrupt controller (EIC) the interrupt mask
bits in the cop0 Status register are reused for the Interrupt Priority
Level, and any interrupts with a priority lower than the field will be
ignored. Clear the field to 0 by default such that all interrupts are
serviced.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
---

arch/mips/kernel/smp-cps.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c
index 253e140..f19f0d3 100644
--- a/arch/mips/kernel/smp-cps.c
+++ b/arch/mips/kernel/smp-cps.c
@@ -307,8 +307,12 @@ static void cps_init_secondary(void)
if (cpu_has_mipsmt)
dmt();

- change_c0_status(ST0_IM, STATUSF_IP2 | STATUSF_IP3 | STATUSF_IP4 |
- STATUSF_IP5 | STATUSF_IP6 | STATUSF_IP7);
+ if (cpu_has_veic)
+ clear_c0_status(ST0_IM);
+ else
+ change_c0_status(ST0_IM, STATUSF_IP2 | STATUSF_IP3 |
+ STATUSF_IP4 | STATUSF_IP5 |
+ STATUSF_IP6 | STATUSF_IP7);
}

static void cps_smp_finish(void)
--
2.8.2
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