MIPS: BMIPS: Let each platform customize the CPU1 IRQ mask

On some chips like bcm3384, "other stuff" gets wired up to CPU1's IE_IRQ1
input, generating spurious IRQs.  In this case we want the platform code
to be able to mask it off.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: f.fainelli@gmail.com
Cc: mbizon@freebox.fr
Cc: jogo@openwrt.org
Cc: jfraser@broadcom.com
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8163/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 5 insertions, 2 deletions

diff --git a/arch/mips/include/asm/bmips.h b/arch/mips/include/asm/bmips.h
index cbaccebf5065..30939b02e3ff 100644
--- a/arch/mips/include/asm/bmips.h
+++ b/arch/mips/include/asm/bmips.h
@@ -84,6 +84,7 @@ extern char bmips_smp_int_vec_end;
 extern int bmips_smp_enabled;
 extern int bmips_cpu_offset;
 extern cpumask_t bmips_booted_mask;
+extern unsigned long bmips_tp1_irqs;
 
 extern void bmips_ebase_setup(void);
 extern asmlinkage void plat_wired_tlb_setup(void);
diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c
index 162391d548b5..b8bd9340c9c7 100644
--- a/arch/mips/kernel/smp-bmips.c
+++ b/arch/mips/kernel/smp-bmips.c
@@ -43,6 +43,7 @@ static int __maybe_unused max_cpus = 1;
 int bmips_smp_enabled = 1;
 int bmips_cpu_offset;
 cpumask_t bmips_booted_mask;
+unsigned long bmips_tp1_irqs = IE_IRQ1;
 
 #define RESET_FROM_KSEG0                0x80080800
 #define RESET_FROM_KSEG1                0xa0080800
@@ -257,7 +258,7 @@ static void bmips_smp_finish(void)
         write_c0_compare(read_c0_count() + mips_hpt_frequency / HZ);
 
         irq_enable_hazard();
-        set_c0_status(IE_SW0 | IE_SW1 | IE_IRQ1 | IE_IRQ5 | ST0_IE);
+        set_c0_status(IE_SW0 | IE_SW1 | bmips_tp1_irqs | IE_IRQ5 | ST0_IE);
         irq_enable_hazard();
 }
 
@@ -387,7 +388,8 @@ void __ref play_dead(void)
          * IRQ handlers; this clears ST0_IE and returns immediately.
          */
         clear_c0_cause(CAUSEF_IV | C_SW0 | C_SW1);
-        change_c0_status(IE_IRQ5 | IE_IRQ1 | IE_SW0 | IE_SW1 | ST0_IE | ST0_BEV,
+        change_c0_status(
+                IE_IRQ5 | bmips_tp1_irqs | IE_SW0 | IE_SW1 | ST0_IE | ST0_BEV,
                 IE_SW0 | IE_SW1 | ST0_IE | ST0_BEV);
         irq_disable_hazard();