m68k/mac: Optimize interrupts using chain handlers
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>hifive-unleashed-5.1
Geert Uytterhoeven
parent
ddc7fd25d0
commit
9145db564e
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@ -56,6 +56,39 @@ void __init baboon_init(void)
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* Baboon interrupt handler. This works a lot like a VIA.
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*/
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#ifdef CONFIG_GENERIC_HARDIRQS
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static void baboon_irq(unsigned int irq, struct irq_desc *desc)
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{
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int irq_bit, irq_num;
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unsigned char events;
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#ifdef DEBUG_IRQS
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printk("baboon_irq: mb_control %02X mb_ifr %02X mb_status %02X\n",
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(uint) baboon->mb_control, (uint) baboon->mb_ifr,
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(uint) baboon->mb_status);
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#endif
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events = baboon->mb_ifr & 0x07;
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if (!events)
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return;
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irq_num = IRQ_BABOON_0;
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irq_bit = 1;
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do {
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if (events & irq_bit) {
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baboon->mb_ifr &= ~irq_bit;
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generic_handle_irq(irq_num);
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}
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irq_bit <<= 1;
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irq_num++;
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} while(events >= irq_bit);
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#if 0
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if (baboon->mb_ifr & 0x02) macide_ack_intr(NULL);
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/* for now we need to smash all interrupts */
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baboon->mb_ifr &= ~events;
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#endif
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}
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#else
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static irqreturn_t baboon_irq(int irq, void *dev_id)
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{
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int irq_bit, irq_num;
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@ -87,6 +120,7 @@ static irqreturn_t baboon_irq(int irq, void *dev_id)
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#endif
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return IRQ_HANDLED;
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}
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#endif
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/*
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* Register the Baboon interrupt dispatcher on nubus slot $C.
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@ -95,8 +129,12 @@ static irqreturn_t baboon_irq(int irq, void *dev_id)
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void __init baboon_register_interrupts(void)
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{
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baboon_disabled = 0;
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#ifdef CONFIG_GENERIC_HARDIRQS
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irq_set_chained_handler(IRQ_NUBUS_C, baboon_irq);
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#else
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if (request_irq(IRQ_NUBUS_C, baboon_irq, 0, "baboon", (void *)baboon))
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pr_err("Couldn't register baboon interrupt\n");
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#endif
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}
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/*
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@ -32,10 +32,11 @@
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int oss_present;
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volatile struct mac_oss *oss;
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static irqreturn_t oss_irq(int, void *);
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static irqreturn_t oss_nubus_irq(int, void *);
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#ifdef CONFIG_GENERIC_HARDIRQS
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extern void via1_irq(unsigned int irq, struct irq_desc *desc);
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#else
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extern irqreturn_t via1_irq(int, void *);
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#endif
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/*
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* Initialize the OSS
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@ -62,23 +63,6 @@ void __init oss_init(void)
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oss->irq_level[OSS_VIA1] = OSS_IRQLEV_VIA1;
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}
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/*
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* Register the OSS and NuBus interrupt dispatchers.
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*/
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void __init oss_register_interrupts(void)
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{
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if (request_irq(OSS_IRQLEV_SCSI, oss_irq, 0, "scsi", (void *)oss))
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pr_err("Couldn't register %s interrupt\n", "scsi");
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if (request_irq(OSS_IRQLEV_NUBUS, oss_nubus_irq, 0, "nubus",
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(void *)oss))
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pr_err("Couldn't register %s interrupt\n", "nubus");
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if (request_irq(OSS_IRQLEV_SOUND, oss_irq, 0, "sound", (void *)oss))
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pr_err("Couldn't register %s interrupt\n", "sound");
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if (request_irq(OSS_IRQLEV_VIA1, via1_irq, 0, "via1", (void *)via1))
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pr_err("Couldn't register %s interrupt\n", "via1");
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}
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/*
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* Initialize OSS for Nubus access
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*/
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@ -92,6 +76,34 @@ void __init oss_nubus_init(void)
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* and SCSI; everything else is routed to its own autovector IRQ.
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*/
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#ifdef CONFIG_GENERIC_HARDIRQS
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static void oss_irq(unsigned int irq, struct irq_desc *desc)
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{
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int events;
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events = oss->irq_pending & (OSS_IP_SOUND|OSS_IP_SCSI);
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if (!events)
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return;
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#ifdef DEBUG_IRQS
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if ((console_loglevel == 10) && !(events & OSS_IP_SCSI)) {
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printk("oss_irq: irq %u events = 0x%04X\n", irq,
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(int) oss->irq_pending);
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}
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#endif
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/* FIXME: how do you clear a pending IRQ? */
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if (events & OSS_IP_SOUND) {
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oss->irq_pending &= ~OSS_IP_SOUND;
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/* FIXME: call sound handler */
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} else if (events & OSS_IP_SCSI) {
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oss->irq_pending &= ~OSS_IP_SCSI;
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generic_handle_irq(IRQ_MAC_SCSI);
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} else {
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/* FIXME: error check here? */
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}
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}
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#else
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static irqreturn_t oss_irq(int irq, void *dev_id)
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{
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int events;
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@ -119,6 +131,7 @@ static irqreturn_t oss_irq(int irq, void *dev_id)
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}
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return IRQ_HANDLED;
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}
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#endif
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/*
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* Nubus IRQ handler, OSS style
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@ -126,6 +139,34 @@ static irqreturn_t oss_irq(int irq, void *dev_id)
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* Unlike the VIA/RBV this is on its own autovector interrupt level.
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*/
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#ifdef CONFIG_GENERIC_HARDIRQS
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static void oss_nubus_irq(unsigned int irq, struct irq_desc *desc)
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{
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int events, irq_bit, i;
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events = oss->irq_pending & OSS_IP_NUBUS;
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if (!events)
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return;
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#ifdef DEBUG_NUBUS_INT
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if (console_loglevel > 7) {
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printk("oss_nubus_irq: events = 0x%04X\n", events);
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}
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#endif
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/* There are only six slots on the OSS, not seven */
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i = 6;
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irq_bit = 0x40;
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do {
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--i;
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irq_bit >>= 1;
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if (events & irq_bit) {
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oss->irq_pending &= ~irq_bit;
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generic_handle_irq(NUBUS_SOURCE_BASE + i);
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}
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} while(events & (irq_bit - 1));
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}
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#else
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static irqreturn_t oss_nubus_irq(int irq, void *dev_id)
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{
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int events, irq_bit, i;
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@ -153,6 +194,31 @@ static irqreturn_t oss_nubus_irq(int irq, void *dev_id)
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} while(events & (irq_bit - 1));
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return IRQ_HANDLED;
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}
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#endif
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/*
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* Register the OSS and NuBus interrupt dispatchers.
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*/
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void __init oss_register_interrupts(void)
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{
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#ifdef CONFIG_GENERIC_HARDIRQS
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irq_set_chained_handler(OSS_IRQLEV_SCSI, oss_irq);
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irq_set_chained_handler(OSS_IRQLEV_NUBUS, oss_nubus_irq);
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irq_set_chained_handler(OSS_IRQLEV_SOUND, oss_irq);
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irq_set_chained_handler(OSS_IRQLEV_VIA1, via1_irq);
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#else /* !CONFIG_GENERIC_HARDIRQS */
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if (request_irq(OSS_IRQLEV_SCSI, oss_irq, 0, "scsi", (void *)oss))
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pr_err("Couldn't register %s interrupt\n", "scsi");
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if (request_irq(OSS_IRQLEV_NUBUS, oss_nubus_irq, 0, "nubus",
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(void *)oss))
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pr_err("Couldn't register %s interrupt\n", "nubus");
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if (request_irq(OSS_IRQLEV_SOUND, oss_irq, 0, "sound", (void *)oss))
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pr_err("Couldn't register %s interrupt\n", "sound");
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if (request_irq(OSS_IRQLEV_VIA1, via1_irq, 0, "via1", (void *)via1))
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pr_err("Couldn't register %s interrupt\n", "via1");
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#endif /* !CONFIG_GENERIC_HARDIRQS */
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}
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/*
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* Enable an OSS interrupt
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@ -33,8 +33,6 @@
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int psc_present;
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volatile __u8 *psc;
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irqreturn_t psc_irq(int, void *);
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/*
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* Debugging dump, used in various places to see what's going on.
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*/
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@ -114,27 +112,41 @@ void __init psc_init(void)
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}
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}
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/*
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* Register the PSC interrupt dispatchers for autovector interrupts 3-6.
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*/
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void __init psc_register_interrupts(void)
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{
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if (request_irq(IRQ_AUTO_3, psc_irq, 0, "psc3", (void *) 0x30))
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pr_err("Couldn't register psc%d interrupt\n", 3);
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if (request_irq(IRQ_AUTO_4, psc_irq, 0, "psc4", (void *) 0x40))
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pr_err("Couldn't register psc%d interrupt\n", 4);
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if (request_irq(IRQ_AUTO_5, psc_irq, 0, "psc5", (void *) 0x50))
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pr_err("Couldn't register psc%d interrupt\n", 5);
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if (request_irq(IRQ_AUTO_6, psc_irq, 0, "psc6", (void *) 0x60))
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pr_err("Couldn't register psc%d interrupt\n", 6);
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}
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/*
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* PSC interrupt handler. It's a lot like the VIA interrupt handler.
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*/
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irqreturn_t psc_irq(int irq, void *dev_id)
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#ifdef CONFIG_GENERIC_HARDIRQS
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static void psc_irq(unsigned int irq, struct irq_desc *desc)
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{
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unsigned int offset = (unsigned int)irq_desc_get_handler_data(desc);
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int pIFR = pIFRbase + offset;
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int pIER = pIERbase + offset;
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int irq_num;
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unsigned char irq_bit, events;
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#ifdef DEBUG_IRQS
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printk("psc_irq: irq %u pIFR = 0x%02X pIER = 0x%02X\n",
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irq, (int) psc_read_byte(pIFR), (int) psc_read_byte(pIER));
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#endif
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events = psc_read_byte(pIFR) & psc_read_byte(pIER) & 0xF;
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if (!events)
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return;
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irq_num = irq << 3;
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irq_bit = 1;
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do {
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if (events & irq_bit) {
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psc_write_byte(pIFR, irq_bit);
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generic_handle_irq(irq_num);
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}
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irq_num++;
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irq_bit <<= 1;
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} while (events >= irq_bit);
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}
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#else
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static irqreturn_t psc_irq(int irq, void *dev_id)
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{
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int pIFR = pIFRbase + ((int) dev_id);
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int pIER = pIERbase + ((int) dev_id);
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@ -162,6 +174,34 @@ irqreturn_t psc_irq(int irq, void *dev_id)
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} while (events >= irq_bit);
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return IRQ_HANDLED;
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}
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#endif
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/*
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* Register the PSC interrupt dispatchers for autovector interrupts 3-6.
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*/
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void __init psc_register_interrupts(void)
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{
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#ifdef CONFIG_GENERIC_HARDIRQS
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irq_set_chained_handler(IRQ_AUTO_3, psc_irq);
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irq_set_handler_data(IRQ_AUTO_3, (void *)0x30);
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irq_set_chained_handler(IRQ_AUTO_4, psc_irq);
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irq_set_handler_data(IRQ_AUTO_4, (void *)0x40);
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irq_set_chained_handler(IRQ_AUTO_5, psc_irq);
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irq_set_handler_data(IRQ_AUTO_5, (void *)0x50);
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irq_set_chained_handler(IRQ_AUTO_6, psc_irq);
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irq_set_handler_data(IRQ_AUTO_6, (void *)0x60);
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#else /* !CONFIG_GENERIC_HARDIRQS */
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if (request_irq(IRQ_AUTO_3, psc_irq, 0, "psc3", (void *) 0x30))
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pr_err("Couldn't register psc%d interrupt\n", 3);
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if (request_irq(IRQ_AUTO_4, psc_irq, 0, "psc4", (void *) 0x40))
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pr_err("Couldn't register psc%d interrupt\n", 4);
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if (request_irq(IRQ_AUTO_5, psc_irq, 0, "psc5", (void *) 0x50))
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pr_err("Couldn't register psc%d interrupt\n", 5);
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if (request_irq(IRQ_AUTO_6, psc_irq, 0, "psc6", (void *) 0x60))
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pr_err("Couldn't register psc%d interrupt\n", 6);
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#endif /* !CONFIG_GENERIC_HARDIRQS */
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}
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void psc_irq_enable(int irq) {
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int irq_src = IRQ_SRC(irq);
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@ -80,9 +80,6 @@ static int gIER,gIFR,gBufA,gBufB;
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static u8 nubus_disabled;
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void via_debug_dump(void);
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irqreturn_t via1_irq(int, void *);
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irqreturn_t via2_irq(int, void *);
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irqreturn_t via_nubus_irq(int, void *);
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void via_irq_enable(int irq);
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void via_irq_disable(int irq);
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void via_irq_clear(int irq);
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@ -288,29 +285,6 @@ void __init via_init_clock(irq_handler_t func)
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pr_err("Couldn't register %s interrupt\n", "timer");
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}
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/*
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* Register the interrupt dispatchers for VIA or RBV machines only.
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*/
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void __init via_register_interrupts(void)
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{
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if (via_alt_mapping) {
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if (request_irq(IRQ_AUTO_1, via1_irq, 0, "software",
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(void *)via1))
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pr_err("Couldn't register %s interrupt\n", "software");
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if (request_irq(IRQ_AUTO_6, via1_irq, 0, "via1", (void *)via1))
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pr_err("Couldn't register %s interrupt\n", "via1");
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} else {
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if (request_irq(IRQ_AUTO_1, via1_irq, 0, "via1", (void *)via1))
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pr_err("Couldn't register %s interrupt\n", "via1");
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}
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if (request_irq(IRQ_AUTO_2, via2_irq, 0, "via2", (void *)via2))
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pr_err("Couldn't register %s interrupt\n", "via2");
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if (request_irq(IRQ_MAC_NUBUS, via_nubus_irq, 0, "nubus",
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(void *)via2))
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pr_err("Couldn't register %s interrupt\n", "nubus");
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}
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/*
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* Debugging dump, used in various places to see what's going on.
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*/
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@ -443,6 +417,49 @@ void __init via_nubus_init(void)
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* via6522.c :-), disable/pending masks added.
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*/
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#ifdef CONFIG_GENERIC_HARDIRQS
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void via1_irq(unsigned int irq, struct irq_desc *desc)
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{
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int irq_num;
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unsigned char irq_bit, events;
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events = via1[vIFR] & via1[vIER] & 0x7F;
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if (!events)
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return;
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irq_num = VIA1_SOURCE_BASE;
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irq_bit = 1;
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do {
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if (events & irq_bit) {
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via1[vIFR] = irq_bit;
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generic_handle_irq(irq_num);
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}
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++irq_num;
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irq_bit <<= 1;
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} while (events >= irq_bit);
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}
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static void via2_irq(unsigned int irq, struct irq_desc *desc)
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{
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int irq_num;
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unsigned char irq_bit, events;
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events = via2[gIFR] & via2[gIER] & 0x7F;
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if (!events)
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return;
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irq_num = VIA2_SOURCE_BASE;
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irq_bit = 1;
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do {
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if (events & irq_bit) {
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via2[gIFR] = irq_bit | rbv_clear;
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generic_handle_irq(irq_num);
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}
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++irq_num;
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irq_bit <<= 1;
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} while (events >= irq_bit);
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}
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#else
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irqreturn_t via1_irq(int irq, void *dev_id)
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{
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int irq_num;
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@ -486,12 +503,49 @@ irqreturn_t via2_irq(int irq, void *dev_id)
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} while (events >= irq_bit);
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return IRQ_HANDLED;
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}
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#endif
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/*
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* Dispatch Nubus interrupts. We are called as a secondary dispatch by the
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* VIA2 dispatcher as a fast interrupt handler.
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*/
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#ifdef CONFIG_GENERIC_HARDIRQS
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void via_nubus_irq(unsigned int irq, struct irq_desc *desc)
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{
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int slot_irq;
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unsigned char slot_bit, events;
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events = ~via2[gBufA] & 0x7F;
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if (rbv_present)
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events &= via2[rSIER];
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else
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events &= ~via2[vDirA];
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if (!events)
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return;
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do {
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slot_irq = IRQ_NUBUS_F;
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slot_bit = 0x40;
|
||||
do {
|
||||
if (events & slot_bit) {
|
||||
events &= ~slot_bit;
|
||||
generic_handle_irq(slot_irq);
|
||||
}
|
||||
--slot_irq;
|
||||
slot_bit >>= 1;
|
||||
} while (events);
|
||||
|
||||
/* clear the CA1 interrupt and make certain there's no more. */
|
||||
via2[gIFR] = 0x02 | rbv_clear;
|
||||
events = ~via2[gBufA] & 0x7F;
|
||||
if (rbv_present)
|
||||
events &= via2[rSIER];
|
||||
else
|
||||
events &= ~via2[vDirA];
|
||||
} while (events);
|
||||
}
|
||||
#else
|
||||
irqreturn_t via_nubus_irq(int irq, void *dev_id)
|
||||
{
|
||||
int slot_irq;
|
||||
|
|
@ -527,6 +581,43 @@ irqreturn_t via_nubus_irq(int irq, void *dev_id)
|
|||
} while (events);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Register the interrupt dispatchers for VIA or RBV machines only.
|
||||
*/
|
||||
|
||||
void __init via_register_interrupts(void)
|
||||
{
|
||||
#ifdef CONFIG_GENERIC_HARDIRQS
|
||||
if (via_alt_mapping) {
|
||||
/* software interrupt */
|
||||
irq_set_chained_handler(IRQ_AUTO_1, via1_irq);
|
||||
/* via1 interrupt */
|
||||
irq_set_chained_handler(IRQ_AUTO_6, via1_irq);
|
||||
} else {
|
||||
irq_set_chained_handler(IRQ_AUTO_1, via1_irq);
|
||||
}
|
||||
irq_set_chained_handler(IRQ_AUTO_2, via2_irq);
|
||||
irq_set_chained_handler(IRQ_MAC_NUBUS, via_nubus_irq);
|
||||
#else
|
||||
if (via_alt_mapping) {
|
||||
if (request_irq(IRQ_AUTO_1, via1_irq, 0, "software",
|
||||
(void *)via1))
|
||||
pr_err("Couldn't register %s interrupt\n", "software");
|
||||
if (request_irq(IRQ_AUTO_6, via1_irq, 0, "via1", (void *)via1))
|
||||
pr_err("Couldn't register %s interrupt\n", "via1");
|
||||
} else {
|
||||
if (request_irq(IRQ_AUTO_1, via1_irq, 0, "via1", (void *)via1))
|
||||
pr_err("Couldn't register %s interrupt\n", "via1");
|
||||
}
|
||||
if (request_irq(IRQ_AUTO_2, via2_irq, 0, "via2", (void *)via2))
|
||||
pr_err("Couldn't register %s interrupt\n", "via2");
|
||||
if (request_irq(IRQ_MAC_NUBUS, via_nubus_irq, 0, "nubus",
|
||||
(void *)via2))
|
||||
pr_err("Couldn't register %s interrupt\n", "nubus");
|
||||
#endif
|
||||
}
|
||||
|
||||
void via_irq_enable(int irq) {
|
||||
int irq_src = IRQ_SRC(irq);
|
||||
|
|
|
|||
Loading…
Reference in New Issue