1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2002
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * (C) Copyright 2002 (440 port)
7 * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
9 * (C) Copyright 2003 Motorola Inc. (MPC85xx port)
10 * Xianghua Xiao (X.Xiao@motorola.com)
12 * (C) Copyright 2004, 2007 Freescale Semiconductor. (MPC86xx Port)
14 * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
22 #include <asm/processor.h>
27 void interrupt_init_cpu(unsigned *decrementer_count)
29 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
30 volatile ccsr_pic_t *pic = &immr->im_pic;
34 * The POST word is stored in the PIC's TFRR register which gets
35 * cleared when the PIC is reset. Save it off so we can restore it
38 ulong post_word = post_word_load();
41 pic->gcr = MPC86xx_PICGCR_RST;
42 while (pic->gcr & MPC86xx_PICGCR_RST)
44 pic->gcr = MPC86xx_PICGCR_MODE;
46 *decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
47 debug("interrupt init: tbclk() = %ld MHz, decrementer_count = %d\n",
48 (get_tbclk() / 1000000),
51 #ifdef CONFIG_INTERRUPTS
53 pic->iivpr1 = 0x810001; /* 50220 enable mcm interrupts */
54 debug("iivpr1@%p = %x\n", &pic->iivpr1, pic->iivpr1);
56 pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */
57 debug("iivpr2@%p = %x\n", &pic->iivpr2, pic->iivpr2);
59 pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */
60 debug("iivpr3@%p = %x\n", &pic->iivpr3, pic->iivpr3);
62 #if defined(CONFIG_PCI1) || defined(CONFIG_PCIE1)
63 pic->iivpr8 = 0x810008; /* enable pcie1 interrupts */
64 debug("iivpr8@%p = %x\n", &pic->iivpr8, pic->iivpr8);
66 #if defined(CONFIG_PCI2) || defined(CONFIG_PCIE2)
67 pic->iivpr9 = 0x810009; /* enable pcie2 interrupts */
68 debug("iivpr9@%p = %x\n", &pic->iivpr9, pic->iivpr9);
71 pic->ctpr = 0; /* 40080 clear current task priority register */
75 post_word_store(post_word);
80 * timer_interrupt - gets called when the decrementer overflows,
81 * with interrupts disabled.
82 * Trivial implementation - no need to be really accurate.
84 void timer_interrupt_cpu(struct pt_regs *regs)
86 /* nothing to do here */
90 * Install and free a interrupt handler. Not implemented yet.
92 void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
96 void irq_free_handler(int vec)
101 * irqinfo - print information about PCI devices,not implemented.
103 int do_irqinfo(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
109 * Handle external interrupts
111 void external_interrupt(struct pt_regs *regs)
113 puts("external_interrupt(oops!)\n");