| /* |
| * (C) Copyright 2000-2002 |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| * Rob Taylor, Flying Pig Systems. robt@flyingpig.com |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <mpc824x.h> |
| #include <asm/processor.h> |
| #include <asm/pci_io.h> |
| #include <commproc.h> |
| #include "drivers/epic.h" |
| |
| int interrupt_init_cpu (unsigned *decrementer_count) |
| { |
| *decrementer_count = (get_bus_freq (0) / 4) / CONFIG_SYS_HZ; |
| |
| /* |
| * It's all broken at the moment and I currently don't need |
| * interrupts. If you want to fix it, have a look at the epic |
| * drivers in dink32 v12. They do everthing and Motorola said |
| * I could use the dink source in this project as long as |
| * copyright notices remain intact. |
| */ |
| |
| epicInit (EPIC_DIRECT_IRQ, 0); |
| /* EPIC won't generate INT unless Current Task Pri < 15 */ |
| epicCurTaskPrioSet(0); |
| |
| return (0); |
| } |
| |
| /****************************************************************************/ |
| |
| /* |
| * Handle external interrupts |
| */ |
| void external_interrupt (struct pt_regs *regs) |
| { |
| register unsigned long temp; |
| |
| pci_readl (CONFIG_SYS_EUMB_ADDR + EPIC_PROC_INT_ACK_REG, temp); |
| sync (); /* i'm not convinced this is needed, but dink source has it */ |
| temp &= 0xff; /*get vector */ |
| |
| /*TODO: handle them -... */ |
| epicEOI (); |
| } |
| |
| /****************************************************************************/ |
| |
| /* |
| * blank int handlers. |
| */ |
| |
| void |
| irq_install_handler (int vec, interrupt_handler_t * handler, void *arg) |
| { |
| } |
| |
| void irq_free_handler (int vec) |
| { |
| |
| } |
| |
| /*TODO: some handlers for winbond and 87308 interrupts |
| and what about generic pci inteerupts? |
| vga? |
| */ |
| |
| void timer_interrupt_cpu (struct pt_regs *regs) |
| { |
| /* nothing to do here */ |
| return; |
| } |
