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irq: nds32: avoid CONFIG_HANDLE_DOMAIN_IRQ 

In preparation for removing HANDLE_DOMAIN_IRQ, have arch/nds32 perform
all the necessary IRQ entry accounting in its entry code.

Currently arch/nds32 is tightly coupled with the ativic32 irqchip, and
while the entry code should logically live under arch/nds32/, moving the
entry logic there makes things more convoluted. So for now, place the
entry logic in the ativic32 irqchip, but separated into a separate
function to make the split of responsibility clear.

In future this should probably use GENERIC_IRQ_MULTI_HANDLER to cleanly
decouple this.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vincent Chen <deanbo422@gmail.com>
This commit is contained in:
Mark Rutland 2021-10-20 11:36:08 +01:00
parent e54957fa3b
commit 6f877e13c2
2 changed files with 20 additions and 3 deletions
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1
arch/nds32/Kconfig
View File

@ -27,7 +27,6 @@ config NDS32
select GENERIC_LIB_MULDI3
select GENERIC_LIB_UCMPDI2
select GENERIC_TIME_VSYSCALL
select HANDLE_DOMAIN_IRQ
select HAVE_ARCH_TRACEHOOK
select HAVE_DEBUG_KMEMLEAK
select HAVE_EXIT_THREAD

22
drivers/irqchip/irq-ativic32.c
View File

@ -5,11 +5,14 @@
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/hardirq.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/irqchip.h>
#include <nds32_intrinsic.h>
#include <asm/irq_regs.h>
unsigned long wake_mask;
static void ativic32_ack_irq(struct irq_data *data)
@ -103,10 +106,25 @@ static irq_hw_number_t get_intr_src(void)
- NDS32_VECTOR_offINTERRUPT;
}
asmlinkage void asm_do_IRQ(struct pt_regs *regs)
static void ativic32_handle_irq(struct pt_regs *regs)
{
irq_hw_number_t hwirq = get_intr_src();
handle_domain_irq(root_domain, hwirq, regs);
generic_handle_domain_irq(root_domain, hwirq);
}
/*
* TODO: convert nds32 to GENERIC_IRQ_MULTI_HANDLER so that this entry logic
* can live in arch code.
*/
asmlinkage void asm_do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs;
irq_enter();
old_regs = set_irq_regs(regs);
ativic32_handle_irq(regs);
set_irq_regs(old_regs);
irq_exit();
}
int __init ativic32_init_irq(struct device_node *node, struct device_node *parent)