2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * (C) Copyright 2002 (440 port)
6 * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
8 * (C) Copyright 2003 Motorola Inc. (MPC85xx port)
9 * Xianghua Xiao (X.Xiao@motorola.com)
11 * (C) Copyright 2004, 2007 Freescale Semiconductor. (MPC86xx Port)
13 * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
15 * SPDX-License-Identifier: GPL-2.0+
21 #include <asm/processor.h>
26 int interrupt_init_cpu(unsigned long *decrementer_count)
28 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
29 volatile ccsr_pic_t *pic = &immr->im_pic;
33 * The POST word is stored in the PIC's TFRR register which gets
34 * cleared when the PIC is reset. Save it off so we can restore it
37 ulong post_word = post_word_load();
40 pic->gcr = MPC86xx_PICGCR_RST;
41 while (pic->gcr & MPC86xx_PICGCR_RST)
43 pic->gcr = MPC86xx_PICGCR_MODE;
45 *decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
46 debug("interrupt init: tbclk() = %ld MHz, decrementer_count = %ld\n",
47 (get_tbclk() / 1000000),
50 #ifdef CONFIG_INTERRUPTS
52 pic->iivpr1 = 0x810001; /* 50220 enable mcm interrupts */
53 debug("iivpr1@%p = %x\n", &pic->iivpr1, pic->iivpr1);
55 pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */
56 debug("iivpr2@%p = %x\n", &pic->iivpr2, pic->iivpr2);
58 pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */
59 debug("iivpr3@%p = %x\n", &pic->iivpr3, pic->iivpr3);
61 #if defined(CONFIG_PCI1) || defined(CONFIG_PCIE1)
62 pic->iivpr8 = 0x810008; /* enable pcie1 interrupts */
63 debug("iivpr8@%p = %x\n", &pic->iivpr8, pic->iivpr8);
65 #if defined(CONFIG_PCI2) || defined(CONFIG_PCIE2)
66 pic->iivpr9 = 0x810009; /* enable pcie2 interrupts */
67 debug("iivpr9@%p = %x\n", &pic->iivpr9, pic->iivpr9);
70 pic->ctpr = 0; /* 40080 clear current task priority register */
74 post_word_store(post_word);
81 * timer_interrupt - gets called when the decrementer overflows,
82 * with interrupts disabled.
83 * Trivial implementation - no need to be really accurate.
85 void timer_interrupt_cpu(struct pt_regs *regs)
87 /* nothing to do here */
91 * Install and free a interrupt handler. Not implemented yet.
93 void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
97 void irq_free_handler(int vec)
102 * irqinfo - print information about PCI devices,not implemented.
104 int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
110 * Handle external interrupts
112 void external_interrupt(struct pt_regs *regs)
114 puts("external_interrupt (oops!)\n");