Commit 6249ecbb authored by James Hogan's avatar James Hogan Committed by Ralf Baechle

MIPS: Malta: Make GIC FDC IRQ workaround Malta specific

Wider testing reveals that the Fast Debug Channel (FDC) interrupt is
routed through the GIC just fine on Pistachio SoC, even though it
contains interAptiv cores. Clearly the FDC interrupt routing problems
previously observed on interAptiv and proAptiv cores are specific to the
Malta FPGA bitstreams.

Move the workaround for interAptiv and proAptiv out of
gic_get_c0_fdc_int() in the GIC irqchip driver into Malta's
get_c0_fdc_int() platform callback, to allow the Pistachio SoC to use
the FDC interrupt.
Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: linux-mips@linux-mips.org
Reviewed-by: default avatarAndrew Bresticker <abrestic@chromium.org>
Cc: James Hartley <james.hartley@imgtec.com>
Patchwork: http://patchwork.linux-mips.org/patch/9748/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent cccf34e9
...@@ -119,18 +119,24 @@ void read_persistent_clock(struct timespec *ts) ...@@ -119,18 +119,24 @@ void read_persistent_clock(struct timespec *ts)
int get_c0_fdc_int(void) int get_c0_fdc_int(void)
{ {
int mips_cpu_fdc_irq; /*
* Some cores claim the FDC is routable through the GIC, but it doesn't
* actually seem to be connected for those Malta bitstreams.
*/
switch (current_cpu_type()) {
case CPU_INTERAPTIV:
case CPU_PROAPTIV:
return -1;
};
if (cpu_has_veic) if (cpu_has_veic)
mips_cpu_fdc_irq = -1; return -1;
else if (gic_present) else if (gic_present)
mips_cpu_fdc_irq = gic_get_c0_fdc_int(); return gic_get_c0_fdc_int();
else if (cp0_fdc_irq >= 0) else if (cp0_fdc_irq >= 0)
mips_cpu_fdc_irq = MIPS_CPU_IRQ_BASE + cp0_fdc_irq; return MIPS_CPU_IRQ_BASE + cp0_fdc_irq;
else else
mips_cpu_fdc_irq = -1; return -1;
return mips_cpu_fdc_irq;
} }
int get_c0_perfcount_int(void) int get_c0_perfcount_int(void)
......
...@@ -257,16 +257,6 @@ int gic_get_c0_fdc_int(void) ...@@ -257,16 +257,6 @@ int gic_get_c0_fdc_int(void)
return MIPS_CPU_IRQ_BASE + cp0_fdc_irq; return MIPS_CPU_IRQ_BASE + cp0_fdc_irq;
} }
/*
* Some cores claim the FDC is routable but it doesn't actually seem to
* be connected.
*/
switch (current_cpu_type()) {
case CPU_INTERAPTIV:
case CPU_PROAPTIV:
return -1;
}
return irq_create_mapping(gic_irq_domain, return irq_create_mapping(gic_irq_domain,
GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_FDC)); GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_FDC));
} }
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment