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generated by cgit v1.2.2 (git 2.25.0) at 2025-10-01 14:38:09 -0400
); extern void shark_init_irq(void); static struct map_desc shark_io_desc[] __initdata = { { IO_BASE , IO_START , IO_SIZE , MT_DEVICE } }; static void __init shark_map_io(void) { iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc)); } #define IRQ_TIMER 0 #define HZ_TIME ((1193180 + HZ/2) / HZ) static irqreturn_t shark_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) { write_seqlock(&xtime_lock); timer_tick(regs); write_sequnlock(&xtime_lock); return IRQ_HANDLED; } static struct irqaction shark_timer_irq = { .name = "Shark Timer Tick", .flags = SA_INTERRUPT | SA_TIMER, .handler = shark_timer_interrupt, }; /* * Set up timer interrupt, and return the current time in seconds. */ static void __init shark_timer_init(void) { outb(0x34, 0x43); /* binary, mode 0, LSB/MSB, Ch 0 */ outb(HZ_TIME & 0xff, 0x40); /* LSB of count */ outb(HZ_TIME >> 8, 0x40); setup_irq(IRQ_TIMER, &shark_timer_irq); } static struct sys_timer shark_timer = { .init = shark_timer_init, }; MACHINE_START(SHARK, "Shark") MAINTAINER("Alexander Schulz") BOOT_MEM(0x08000000, 0x40000000, 0xe0000000) BOOT_PARAMS(0x08003000) MAPIO(shark_map_io) INITIRQ(shark_init_irq) .timer = &shark_timer, MACHINE_END