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b6fb218cf9
When compiling an MMU kernel without any platform support, e.g.
"MMU=y allnoconfig":
echo CONFIG_MMU=y > allno.config
make KCONFIG_ALLCONFIG=1 allnoconfig
NR_IRQS is zero, causing a build failure:
kernel/irq/irqdesc.c:593:3: error: array index in initializer exceeds array bounds
593 | [0 ... NR_IRQS-1] = {
| ^
kernel/irq/irqdesc.c:593:3: note: (near initialization for ‘irq_desc’)
kernel/irq/irqdesc.c:593:22: warning: excess elements in array initializer
593 | [0 ... NR_IRQS-1] = {
| ^
kernel/irq/irqdesc.c:593:22: note: (near initialization for ‘irq_desc’)
Fix this by setting the default value of NR_IRQS to 8, which is the
mininum number of interrupts on any m68k CPU (the DIP48 variant of the
MC68008 has tied IPL0 and IPL2 together, but that does not impact the
range).
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/71db70dc27b46e5326518cd23cb94fa6bee172fe.1730805216.git.geert@linux-m68k.org
84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _M68K_IRQ_H_
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#define _M68K_IRQ_H_
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#include <linux/atomic.h>
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#include <linux/linkage.h>
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/*
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* This should be the same as the max(NUM_X_SOURCES) for all the
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* different m68k hosts compiled into the kernel.
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* Currently the Atari has 72 and the Amiga 24, but if both are
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* supported in the kernel it is better to make room for 72.
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* With EtherNAT add-on card on Atari, the highest interrupt
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* number is 140 so NR_IRQS needs to be 141.
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*/
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#if defined(CONFIG_COLDFIRE)
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#define NR_IRQS 256
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#elif defined(CONFIG_VME) || defined(CONFIG_SUN3) || \
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defined(CONFIG_SUN3X) || defined(CONFIG_VIRT)
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#define NR_IRQS 200
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#elif defined(CONFIG_ATARI)
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#define NR_IRQS 141
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#elif defined(CONFIG_MAC)
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#define NR_IRQS 72
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#elif defined(CONFIG_Q40)
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#define NR_IRQS 43
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#elif defined(CONFIG_AMIGA) || !defined(CONFIG_MMU)
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#define NR_IRQS 32
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#elif defined(CONFIG_APOLLO)
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#define NR_IRQS 24
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#else /* CONFIG_HP300 etc. */
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#define NR_IRQS 8
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#endif
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#if defined(CONFIG_M68020) || defined(CONFIG_M68030) || \
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defined(CONFIG_M68040) || defined(CONFIG_M68060)
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/*
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* Interrupt source definitions
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* General interrupt sources are the level 1-7.
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* Adding an interrupt service routine for one of these sources
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* results in the addition of that routine to a chain of routines.
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* Each one is called in succession. Each individual interrupt
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* service routine should determine if the device associated with
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* that routine requires service.
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*/
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#define IRQ_SPURIOUS 0
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#define IRQ_AUTO_1 1 /* level 1 interrupt */
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#define IRQ_AUTO_2 2 /* level 2 interrupt */
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#define IRQ_AUTO_3 3 /* level 3 interrupt */
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#define IRQ_AUTO_4 4 /* level 4 interrupt */
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#define IRQ_AUTO_5 5 /* level 5 interrupt */
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#define IRQ_AUTO_6 6 /* level 6 interrupt */
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#define IRQ_AUTO_7 7 /* level 7 interrupt (non-maskable) */
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#define IRQ_USER 8
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struct irq_data;
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struct irq_chip;
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struct irq_desc;
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struct pt_regs;
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extern unsigned int m68k_irq_startup(struct irq_data *data);
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extern unsigned int m68k_irq_startup_irq(unsigned int irq);
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extern void m68k_irq_shutdown(struct irq_data *data);
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extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int,
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struct pt_regs *));
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extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt);
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extern void m68k_setup_irq_controller(struct irq_chip *,
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void (*handle)(struct irq_desc *desc),
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unsigned int irq, unsigned int cnt);
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extern unsigned int irq_canonicalize(unsigned int irq);
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#else
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#define irq_canonicalize(irq) (irq)
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#endif /* !(CONFIG_M68020 || CONFIG_M68030 || CONFIG_M68040 || CONFIG_M68060) */
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asmlinkage void do_IRQ(int irq, struct pt_regs *regs);
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extern atomic_t irq_err_count;
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#endif /* _M68K_IRQ_H_ */
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