diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/m68k/mac/macints.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/m68k/mac/macints.c | 340 |
1 files changed, 0 insertions, 340 deletions
diff --git a/ANDROID_3.4.5/arch/m68k/mac/macints.c b/ANDROID_3.4.5/arch/m68k/mac/macints.c deleted file mode 100644 index 5c1a6b2f..00000000 --- a/ANDROID_3.4.5/arch/m68k/mac/macints.c +++ /dev/null @@ -1,340 +0,0 @@ -/* - * Macintosh interrupts - * - * General design: - * In contrary to the Amiga and Atari platforms, the Mac hardware seems to - * exclusively use the autovector interrupts (the 'generic level0-level7' - * interrupts with exception vectors 0x19-0x1f). The following interrupt levels - * are used: - * 1 - VIA1 - * - slot 0: one second interrupt (CA2) - * - slot 1: VBlank (CA1) - * - slot 2: ADB data ready (SR full) - * - slot 3: ADB data (CB2) - * - slot 4: ADB clock (CB1) - * - slot 5: timer 2 - * - slot 6: timer 1 - * - slot 7: status of IRQ; signals 'any enabled int.' - * - * 2 - VIA2 or RBV - * - slot 0: SCSI DRQ (CA2) - * - slot 1: NUBUS IRQ (CA1) need to read port A to find which - * - slot 2: /EXP IRQ (only on IIci) - * - slot 3: SCSI IRQ (CB2) - * - slot 4: ASC IRQ (CB1) - * - slot 5: timer 2 (not on IIci) - * - slot 6: timer 1 (not on IIci) - * - slot 7: status of IRQ; signals 'any enabled int.' - * - * Levels 3-6 vary by machine type. For VIA or RBV Macintoshes: - * - * 3 - unused (?) - * - * 4 - SCC - * - * 5 - unused (?) - * [serial errors or special conditions seem to raise level 6 - * interrupts on some models (LC4xx?)] - * - * 6 - off switch (?) - * - * Machines with Quadra-like VIA hardware, except PSC and PMU machines, support - * an alternate interrupt mapping, as used by A/UX. It spreads ethernet and - * sound out to their own autovector IRQs and gives VIA1 a higher priority: - * - * 1 - unused (?) - * - * 3 - on-board SONIC - * - * 5 - Apple Sound Chip (ASC) - * - * 6 - VIA1 - * - * For OSS Macintoshes (IIfx only), we apply an interrupt mapping similar to - * the Quadra (A/UX) mapping: - * - * 1 - ISM IOP (ADB) - * - * 2 - SCSI - * - * 3 - NuBus - * - * 4 - SCC IOP - * - * 6 - VIA1 - * - * For PSC Macintoshes (660AV, 840AV): - * - * 3 - PSC level 3 - * - slot 0: MACE - * - * 4 - PSC level 4 - * - slot 1: SCC channel A interrupt - * - slot 2: SCC channel B interrupt - * - slot 3: MACE DMA - * - * 5 - PSC level 5 - * - * 6 - PSC level 6 - * - * Finally we have good 'ole level 7, the non-maskable interrupt: - * - * 7 - NMI (programmer's switch on the back of some Macs) - * Also RAM parity error on models which support it (IIc, IIfx?) - * - * The current interrupt logic looks something like this: - * - * - We install dispatchers for the autovector interrupts (1-7). These - * dispatchers are responsible for querying the hardware (the - * VIA/RBV/OSS/PSC chips) to determine the actual interrupt source. Using - * this information a machspec interrupt number is generated by placing the - * index of the interrupt hardware into the low three bits and the original - * autovector interrupt number in the upper 5 bits. The handlers for the - * resulting machspec interrupt are then called. - * - * - Nubus is a special case because its interrupts are hidden behind two - * layers of hardware. Nubus interrupts come in as index 1 on VIA #2, - * which translates to IRQ number 17. In this spot we install _another_ - * dispatcher. This dispatcher finds the interrupting slot number (9-F) and - * then forms a new machspec interrupt number as above with the slot number - * minus 9 in the low three bits and the pseudo-level 7 in the upper five - * bits. The handlers for this new machspec interrupt number are then - * called. This puts Nubus interrupts into the range 56-62. - * - * - The Baboon interrupts (used on some PowerBooks) are an even more special - * case. They're hidden behind the Nubus slot $C interrupt thus adding a - * third layer of indirection. Why oh why did the Apple engineers do that? - * - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/delay.h> - -#include <asm/irq.h> -#include <asm/macintosh.h> -#include <asm/macints.h> -#include <asm/mac_via.h> -#include <asm/mac_psc.h> -#include <asm/mac_oss.h> -#include <asm/mac_iop.h> -#include <asm/mac_baboon.h> -#include <asm/hwtest.h> -#include <asm/irq_regs.h> - -#define SHUTUP_SONIC - -/* - * console_loglevel determines NMI handler function - */ - -irqreturn_t mac_nmi_handler(int, void *); -irqreturn_t mac_debug_handler(int, void *); - -/* #define DEBUG_MACINTS */ - -static unsigned int mac_irq_startup(struct irq_data *); -static void mac_irq_shutdown(struct irq_data *); - -static struct irq_chip mac_irq_chip = { - .name = "mac", - .irq_enable = mac_irq_enable, - .irq_disable = mac_irq_disable, - .irq_startup = mac_irq_startup, - .irq_shutdown = mac_irq_shutdown, -}; - -void __init mac_init_IRQ(void) -{ -#ifdef DEBUG_MACINTS - printk("mac_init_IRQ(): Setting things up...\n"); -#endif - m68k_setup_irq_controller(&mac_irq_chip, handle_simple_irq, IRQ_USER, - NUM_MAC_SOURCES - IRQ_USER); - /* Make sure the SONIC interrupt is cleared or things get ugly */ -#ifdef SHUTUP_SONIC - printk("Killing onboard sonic... "); - /* This address should hopefully be mapped already */ - if (hwreg_present((void*)(0x50f0a000))) { - *(long *)(0x50f0a014) = 0x7fffL; - *(long *)(0x50f0a010) = 0L; - } - printk("Done.\n"); -#endif /* SHUTUP_SONIC */ - - /* - * Now register the handlers for the master IRQ handlers - * at levels 1-7. Most of the work is done elsewhere. - */ - - if (oss_present) - oss_register_interrupts(); - else - via_register_interrupts(); - if (psc_present) - psc_register_interrupts(); - if (baboon_present) - baboon_register_interrupts(); - iop_register_interrupts(); - if (request_irq(IRQ_AUTO_7, mac_nmi_handler, 0, "NMI", - mac_nmi_handler)) - pr_err("Couldn't register NMI\n"); -#ifdef DEBUG_MACINTS - printk("mac_init_IRQ(): Done!\n"); -#endif -} - -/* - * mac_irq_enable - enable an interrupt source - * mac_irq_disable - disable an interrupt source - * - * These routines are just dispatchers to the VIA/OSS/PSC routines. - */ - -void mac_irq_enable(struct irq_data *data) -{ - int irq = data->irq; - int irq_src = IRQ_SRC(irq); - - switch(irq_src) { - case 1: - case 2: - case 7: - if (oss_present) - oss_irq_enable(irq); - else - via_irq_enable(irq); - break; - case 3: - case 4: - case 5: - case 6: - if (psc_present) - psc_irq_enable(irq); - else if (oss_present) - oss_irq_enable(irq); - break; - case 8: - if (baboon_present) - baboon_irq_enable(irq); - break; - } -} - -void mac_irq_disable(struct irq_data *data) -{ - int irq = data->irq; - int irq_src = IRQ_SRC(irq); - - switch(irq_src) { - case 1: - case 2: - case 7: - if (oss_present) - oss_irq_disable(irq); - else - via_irq_disable(irq); - break; - case 3: - case 4: - case 5: - case 6: - if (psc_present) - psc_irq_disable(irq); - else if (oss_present) - oss_irq_disable(irq); - break; - case 8: - if (baboon_present) - baboon_irq_disable(irq); - break; - } -} - -static unsigned int mac_irq_startup(struct irq_data *data) -{ - int irq = data->irq; - - if (IRQ_SRC(irq) == 7 && !oss_present) - via_nubus_irq_startup(irq); - else - mac_irq_enable(data); - - return 0; -} - -static void mac_irq_shutdown(struct irq_data *data) -{ - int irq = data->irq; - - if (IRQ_SRC(irq) == 7 && !oss_present) - via_nubus_irq_shutdown(irq); - else - mac_irq_disable(data); -} - -static int num_debug[8]; - -irqreturn_t mac_debug_handler(int irq, void *dev_id) -{ - if (num_debug[irq] < 10) { - printk("DEBUG: Unexpected IRQ %d\n", irq); - num_debug[irq]++; - } - return IRQ_HANDLED; -} - -static int in_nmi; -static volatile int nmi_hold; - -irqreturn_t mac_nmi_handler(int irq, void *dev_id) -{ - int i; - /* - * generate debug output on NMI switch if 'debug' kernel option given - * (only works with Penguin!) - */ - - in_nmi++; - for (i=0; i<100; i++) - udelay(1000); - - if (in_nmi == 1) { - nmi_hold = 1; - printk("... pausing, press NMI to resume ..."); - } else { - printk(" ok!\n"); - nmi_hold = 0; - } - - barrier(); - - while (nmi_hold == 1) - udelay(1000); - - if (console_loglevel >= 8) { -#if 0 - struct pt_regs *fp = get_irq_regs(); - show_state(); - printk("PC: %08lx\nSR: %04x SP: %p\n", fp->pc, fp->sr, fp); - printk("d0: %08lx d1: %08lx d2: %08lx d3: %08lx\n", - fp->d0, fp->d1, fp->d2, fp->d3); - printk("d4: %08lx d5: %08lx a0: %08lx a1: %08lx\n", - fp->d4, fp->d5, fp->a0, fp->a1); - - if (STACK_MAGIC != *(unsigned long *)current->kernel_stack_page) - printk("Corrupted stack page\n"); - printk("Process %s (pid: %d, stackpage=%08lx)\n", - current->comm, current->pid, current->kernel_stack_page); - if (intr_count == 1) - dump_stack((struct frame *)fp); -#else - /* printk("NMI "); */ -#endif - } - in_nmi--; - return IRQ_HANDLED; -} |