diff options
Diffstat (limited to 'arch/ppc/cpu/mpc5xx/interrupts.c')
| -rw-r--r-- | arch/ppc/cpu/mpc5xx/interrupts.c | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/arch/ppc/cpu/mpc5xx/interrupts.c b/arch/ppc/cpu/mpc5xx/interrupts.c deleted file mode 100644 index 167543f..0000000 --- a/arch/ppc/cpu/mpc5xx/interrupts.c +++ /dev/null @@ -1,207 +0,0 @@ -/* - * (C) Copyright 2000-2002 Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * (C) Copyright 2003 Martin Winistoerfer, martinwinistoerfer@gmx.ch. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, - */ - -/* - * File: interrupt.c - * - * Discription: Contains interrupt routines needed by U-Boot - * - */ - -#include <common.h> -#include <command.h> -#include <mpc5xx.h> -#include <asm/processor.h> - -#if defined(CONFIG_PATI) -/* PATI uses IRQs for PCI doorbell */ -#undef NR_IRQS -#define NR_IRQS 16 -#endif - -struct interrupt_action { - interrupt_handler_t *handler; - void *arg; - int count; -}; - -static struct interrupt_action irq_vecs[NR_IRQS]; - -/* - * Initialise interrupts - */ - -int interrupt_init_cpu (ulong *decrementer_count) -{ - volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR; - int vec; - - /* Decrementer used here for status led */ - *decrementer_count = get_tbclk () / CONFIG_SYS_HZ; - - /* Disable all interrupts */ - immr->im_siu_conf.sc_simask = 0; - for (vec=0; vec<NR_IRQS; vec++) { - irq_vecs[vec].handler = NULL; - irq_vecs[vec].arg = NULL; - irq_vecs[vec].count = 0; - } - - return (0); -} - -/* - * Handle external interrupts - */ -void external_interrupt (struct pt_regs *regs) -{ - volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR; - int irq; - ulong simask, newmask; - ulong vec, v_bit; - - /* - * read the SIVEC register and shift the bits down - * to get the irq number - */ - vec = immr->im_siu_conf.sc_sivec; - irq = vec >> 26; - v_bit = 0x80000000UL >> irq; - - /* - * Read Interrupt Mask Register and Mask Interrupts - */ - simask = immr->im_siu_conf.sc_simask; - newmask = simask & (~(0xFFFF0000 >> irq)); - immr->im_siu_conf.sc_simask = newmask; - - if (!(irq & 0x1)) { /* External Interrupt ? */ - ulong siel; - - /* - * Read Interrupt Edge/Level Register - */ - siel = immr->im_siu_conf.sc_siel; - - if (siel & v_bit) { /* edge triggered interrupt ? */ - /* - * Rewrite SIPEND Register to clear interrupt - */ - immr->im_siu_conf.sc_sipend = v_bit; - } - } - - if (irq_vecs[irq].handler != NULL) { - irq_vecs[irq].handler (irq_vecs[irq].arg); - } else { - printf ("\nBogus External Interrupt IRQ %d Vector %ld\n", - irq, vec); - /* turn off the bogus interrupt to avoid it from now */ - simask &= ~v_bit; - } - /* - * Re-Enable old Interrupt Mask - */ - immr->im_siu_conf.sc_simask = simask; -} - -/* - * Install and free an interrupt handler - */ -void irq_install_handler (int vec, interrupt_handler_t * handler, - void *arg) -{ - volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR; - /* SIU interrupt */ - if (irq_vecs[vec].handler != NULL) { - printf ("SIU interrupt %d 0x%x\n", - vec, - (uint) handler); - } - irq_vecs[vec].handler = handler; - irq_vecs[vec].arg = arg; - immr->im_siu_conf.sc_simask |= 1 << (31 - vec); -#if 0 - printf ("Install SIU interrupt for vector %d ==> %p\n", - vec, handler); -#endif -} - -void irq_free_handler (int vec) -{ - volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR; - /* SIU interrupt */ -#if 0 - printf ("Free CPM interrupt for vector %d\n", - vec); -#endif - immr->im_siu_conf.sc_simask &= ~(1 << (31 - vec)); - irq_vecs[vec].handler = NULL; - irq_vecs[vec].arg = NULL; -} - -/* - * Timer interrupt - gets called when bit 0 of DEC changes from - * 0. Decrementer is enabled with bit TBE in TBSCR. - */ -void timer_interrupt_cpu (struct pt_regs *regs) -{ - volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR; - -#if 0 - printf ("*** Timer Interrupt *** "); -#endif - /* Reset Timer Status Bit and Timers Interrupt Status */ - immr->im_clkrstk.cark_plprcrk = KAPWR_KEY; - __asm__ ("nop"); - immr->im_clkrst.car_plprcr |= PLPRCR_TEXPS | PLPRCR_TMIST; - - return; -} - -#if defined(CONFIG_CMD_IRQ) -/******************************************************************************* - * - * irqinfo - print information about IRQs - * - */ -int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) -{ - int vec; - - printf ("\nInterrupt-Information:\n"); - printf ("Nr Routine Arg Count\n"); - - for (vec=0; vec<NR_IRQS; vec++) { - if (irq_vecs[vec].handler != NULL) { - printf ("%02d %08lx %08lx %d\n", - vec, - (ulong)irq_vecs[vec].handler, - (ulong)irq_vecs[vec].arg, - irq_vecs[vec].count); - } - } - return 0; -} - - -#endif |