From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/sh/boards/saturn/irq.c | 118 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 118 insertions(+) create mode 100644 arch/sh/boards/saturn/irq.c (limited to 'arch/sh/boards/saturn/irq.c') diff --git a/arch/sh/boards/saturn/irq.c b/arch/sh/boards/saturn/irq.c new file mode 100644 index 00000000000..15d1d3f0f78 --- /dev/null +++ b/arch/sh/boards/saturn/irq.c @@ -0,0 +1,118 @@ +/* + * arch/sh/boards/saturn/irq.c + * + * Copyright (C) 2002 Paul Mundt + * + * Released under the terms of the GNU GPL v2.0. + */ +#include +#include +#include +#include +#include + +/* + * Interrupts map out as follows: + * + * Vector Name Mask + * + * 64 VBLANKIN 0x0001 + * 65 VBLANKOUT 0x0002 + * 66 HBLANKIN 0x0004 + * 67 TIMER0 0x0008 + * 68 TIMER1 0x0010 + * 69 DSPEND 0x0020 + * 70 SOUNDREQUEST 0x0040 + * 71 SYSTEMMANAGER 0x0080 + * 72 PAD 0x0100 + * 73 LEVEL2DMAEND 0x0200 + * 74 LEVEL1DMAEND 0x0400 + * 75 LEVEL0DMAEND 0x0800 + * 76 DMAILLEGAL 0x1000 + * 77 SRITEDRAWEND 0x2000 + * 78 ABUS 0x8000 + * + */ +#define SATURN_IRQ_MIN 64 /* VBLANKIN */ +#define SATURN_IRQ_MAX 78 /* ABUS */ + +#define SATURN_IRQ_MASK 0xbfff + +static inline u32 saturn_irq_mask(unsigned int irq_nr) +{ + u32 mask; + + mask = (1 << (irq_nr - SATURN_IRQ_MIN)); + mask <<= (irq_nr == SATURN_IRQ_MAX); + mask &= SATURN_IRQ_MASK; + + return mask; +} + +static inline void mask_saturn_irq(unsigned int irq_nr) +{ + u32 mask; + + mask = ctrl_inl(SATURN_IMR); + mask |= saturn_irq_mask(irq_nr); + ctrl_outl(mask, SATURN_IMR); +} + +static inline void unmask_saturn_irq(unsigned int irq_nr) +{ + u32 mask; + + mask = ctrl_inl(SATURN_IMR); + mask &= ~saturn_irq_mask(irq_nr); + ctrl_outl(mask, SATURN_IMR); +} + +static void disable_saturn_irq(unsigned int irq_nr) +{ + mask_saturn_irq(irq_nr); +} + +static void enable_saturn_irq(unsigned int irq_nr) +{ + unmask_saturn_irq(irq_nr); +} + +static void mask_and_ack_saturn_irq(unsigned int irq_nr) +{ + mask_saturn_irq(irq_nr); +} + +static void end_saturn_irq(unsigned int irq_nr) +{ + if (!(irq_desc[irq_nr].status & (IRQ_DISABLED | IRQ_INPROGRESS))) + unmask_saturn_irq(irq_nr); +} + +static unsigned int startup_saturn_irq(unsigned int irq_nr) +{ + unmask_saturn_irq(irq_nr); + + return 0; +} + +static void shutdown_saturn_irq(unsigned int irq_nr) +{ + mask_saturn_irq(irq_nr); +} + +static struct hw_interrupt_type saturn_int = { + .typename = "Saturn", + .enable = enable_saturn_irq, + .disable = disable_saturn_irq, + .ack = mask_and_ack_saturn_irq, + .end = end_saturn_irq, + .startup = startup_saturn_irq, + .shutdown = shutdown_saturn_irq, +}; + +int saturn_irq_demux(int irq_nr) +{ + /* FIXME */ + return irq_nr; +} + -- cgit v1.2.3-70-g09d2