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Jon Loeligerdebb7352006-04-26 17:58:56 -05001/*
2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * (C) Copyright 2002 (440 port)
6 * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
7 *
8 * (C) Copyright 2003 Motorola Inc. (MPC85xx port)
9 * Xianghua Xiao (X.Xiao@motorola.com)
10 *
Jon Loeligercfc7a7f2007-08-02 14:42:20 -050011 * (C) Copyright 2004, 2007 Freescale Semiconductor. (MPC86xx Port)
Jon Loeligerc934f652006-05-31 13:55:35 -050012 * Jeff Brown
Jon Loeligerdebb7352006-04-26 17:58:56 -050013 * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
14 *
15 * See file CREDITS for list of people who contributed to this
16 * project.
17 *
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License as
20 * published by the Free Software Foundation; either version 2 of
21 * the License, or (at your option) any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 * MA 02111-1307 USA
32 */
33
34#include <common.h>
35#include <mpc86xx.h>
36#include <command.h>
37#include <asm/processor.h>
John Schmollercc1dd332011-03-10 16:09:26 -060038#ifdef CONFIG_POST
39#include <post.h>
40#endif
Jon Loeligerdebb7352006-04-26 17:58:56 -050041
Wolfgang Denkcdd917a2007-08-02 00:48:45 +020042int interrupt_init_cpu(unsigned long *decrementer_count)
Jon Loeligerdebb7352006-04-26 17:58:56 -050043{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020044 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
Kumar Gala5c7cbcd2008-08-19 15:05:34 -050045 volatile ccsr_pic_t *pic = &immr->im_pic;
Haiying Wang9964a4d2006-12-07 10:35:55 -060046
John Schmollercc1dd332011-03-10 16:09:26 -060047#ifdef CONFIG_POST
48 /*
49 * The POST word is stored in the PIC's TFRR register which gets
50 * cleared when the PIC is reset. Save it off so we can restore it
51 * later.
52 */
53 ulong post_word = post_word_load();
54#endif
55
Kumar Gala5c7cbcd2008-08-19 15:05:34 -050056 pic->gcr = MPC86xx_PICGCR_RST;
57 while (pic->gcr & MPC86xx_PICGCR_RST)
58 ;
59 pic->gcr = MPC86xx_PICGCR_MODE;
Jon Loeligerdebb7352006-04-26 17:58:56 -050060
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020061 *decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
Marek Vasut7f2229b2011-10-21 14:17:27 +000062 debug("interrupt init: tbclk() = %ld MHz, decrementer_count = %ld\n",
Jon Loeligerffff3ae2006-08-22 12:06:18 -050063 (get_tbclk() / 1000000),
Kumar Gala5c7cbcd2008-08-19 15:05:34 -050064 *decrementer_count);
Jon Loeliger5c9efb32006-04-27 10:15:16 -050065
Jon Loeligercfc7a7f2007-08-02 14:42:20 -050066#ifdef CONFIG_INTERRUPTS
Jon Loeligercfc7a7f2007-08-02 14:42:20 -050067
68 pic->iivpr1 = 0x810001; /* 50220 enable mcm interrupts */
Marek Vasut7f2229b2011-10-21 14:17:27 +000069 debug("iivpr1@%p = %x\n", &pic->iivpr1, pic->iivpr1);
Jon Loeligercfc7a7f2007-08-02 14:42:20 -050070
71 pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */
Marek Vasut7f2229b2011-10-21 14:17:27 +000072 debug("iivpr2@%p = %x\n", &pic->iivpr2, pic->iivpr2);
Jon Loeligercfc7a7f2007-08-02 14:42:20 -050073
74 pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */
Marek Vasut7f2229b2011-10-21 14:17:27 +000075 debug("iivpr3@%p = %x\n", &pic->iivpr3, pic->iivpr3);
Jon Loeligercfc7a7f2007-08-02 14:42:20 -050076
77#if defined(CONFIG_PCI1) || defined(CONFIG_PCIE1)
78 pic->iivpr8 = 0x810008; /* enable pcie1 interrupts */
Marek Vasut7f2229b2011-10-21 14:17:27 +000079 debug("iivpr8@%p = %x\n", &pic->iivpr8, pic->iivpr8);
Jon Loeligercfc7a7f2007-08-02 14:42:20 -050080#endif
81#if defined(CONFIG_PCI2) || defined(CONFIG_PCIE2)
82 pic->iivpr9 = 0x810009; /* enable pcie2 interrupts */
Marek Vasut7f2229b2011-10-21 14:17:27 +000083 debug("iivpr9@%p = %x\n", &pic->iivpr9, pic->iivpr9);
Jon Loeligercfc7a7f2007-08-02 14:42:20 -050084#endif
85
86 pic->ctpr = 0; /* 40080 clear current task priority register */
87#endif
88
John Schmollercc1dd332011-03-10 16:09:26 -060089#ifdef CONFIG_POST
90 post_word_store(post_word);
91#endif
92
Jon Loeliger5c9efb32006-04-27 10:15:16 -050093 return 0;
Jon Loeligerdebb7352006-04-26 17:58:56 -050094}
95
Jon Loeligerdebb7352006-04-26 17:58:56 -050096/*
97 * timer_interrupt - gets called when the decrementer overflows,
98 * with interrupts disabled.
99 * Trivial implementation - no need to be really accurate.
100 */
Jon Loeligerffff3ae2006-08-22 12:06:18 -0500101void timer_interrupt_cpu(struct pt_regs *regs)
Jon Loeligerdebb7352006-04-26 17:58:56 -0500102{
103 /* nothing to do here */
Jon Loeligerdebb7352006-04-26 17:58:56 -0500104}
105
Jon Loeligerdebb7352006-04-26 17:58:56 -0500106/*
107 * Install and free a interrupt handler. Not implemented yet.
108 */
Jon Loeligerffff3ae2006-08-22 12:06:18 -0500109void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
Jon Loeligerdebb7352006-04-26 17:58:56 -0500110{
Jon Loeligerdebb7352006-04-26 17:58:56 -0500111}
112
Jon Loeligerffff3ae2006-08-22 12:06:18 -0500113void irq_free_handler(int vec)
Jon Loeligerdebb7352006-04-26 17:58:56 -0500114{
Jon Loeligerdebb7352006-04-26 17:58:56 -0500115}
116
Jon Loeligerc934f652006-05-31 13:55:35 -0500117/*
Jon Loeligerdebb7352006-04-26 17:58:56 -0500118 * irqinfo - print information about PCI devices,not implemented.
Jon Loeligerdebb7352006-04-26 17:58:56 -0500119 */
Wolfgang Denk54841ab2010-06-28 22:00:46 +0200120int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
Jon Loeligerdebb7352006-04-26 17:58:56 -0500121{
Jon Loeligerdebb7352006-04-26 17:58:56 -0500122 return 0;
123}
124
125/*
126 * Handle external interrupts
127 */
Jon Loeligerffff3ae2006-08-22 12:06:18 -0500128void external_interrupt(struct pt_regs *regs)
Jon Loeligerdebb7352006-04-26 17:58:56 -0500129{
130 puts("external_interrupt (oops!)\n");
131}