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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/ia64/kernel/irq_lsapic.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/ia64/kernel/irq_lsapic.c')
-rw-r--r-- | arch/ia64/kernel/irq_lsapic.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/ia64/kernel/irq_lsapic.c b/arch/ia64/kernel/irq_lsapic.c new file mode 100644 index 000000000..23bf4499a --- /dev/null +++ b/arch/ia64/kernel/irq_lsapic.c @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * LSAPIC Interrupt Controller + * + * This takes care of interrupts that are generated by the CPU's + * internal Streamlined Advanced Programmable Interrupt Controller + * (LSAPIC), such as the ITC and IPI interrupts. + * + * Copyright (C) 1999 VA Linux Systems + * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> + * Copyright (C) 2000 Hewlett-Packard Co + * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> + */ + +#include <linux/sched.h> +#include <linux/irq.h> + +static unsigned int +lsapic_noop_startup (struct irq_data *data) +{ + return 0; +} + +static void +lsapic_noop (struct irq_data *data) +{ + /* nothing to do... */ +} + +static int lsapic_retrigger(struct irq_data *data) +{ + ia64_resend_irq(data->irq); + + return 1; +} + +struct irq_chip irq_type_ia64_lsapic = { + .name = "LSAPIC", + .irq_startup = lsapic_noop_startup, + .irq_shutdown = lsapic_noop, + .irq_enable = lsapic_noop, + .irq_disable = lsapic_noop, + .irq_ack = lsapic_noop, + .irq_retrigger = lsapic_retrigger, +}; |