1 /* 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 * 11 * (C) Copyright 2004, 2007 Freescale Semiconductor. (MPC86xx Port) 12 * Jeff Brown 13 * 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> 38 #ifdef CONFIG_POST 39 #include <post.h> 40 #endif 41 42 int interrupt_init_cpu(unsigned long *decrementer_count) 43 { 44 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR; 45 volatile ccsr_pic_t *pic = &immr->im_pic; 46 47 #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 56 pic->gcr = MPC86xx_PICGCR_RST; 57 while (pic->gcr & MPC86xx_PICGCR_RST) 58 ; 59 pic->gcr = MPC86xx_PICGCR_MODE; 60 61 *decrementer_count = get_tbclk() / CONFIG_SYS_HZ; 62 debug("interrupt init: tbclk() = %ld MHz, decrementer_count = %ld\n", 63 (get_tbclk() / 1000000), 64 *decrementer_count); 65 66 #ifdef CONFIG_INTERRUPTS 67 68 pic->iivpr1 = 0x810001; /* 50220 enable mcm interrupts */ 69 debug("iivpr1@%p = %x\n", &pic->iivpr1, pic->iivpr1); 70 71 pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */ 72 debug("iivpr2@%p = %x\n", &pic->iivpr2, pic->iivpr2); 73 74 pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */ 75 debug("iivpr3@%p = %x\n", &pic->iivpr3, pic->iivpr3); 76 77 #if defined(CONFIG_PCI1) || defined(CONFIG_PCIE1) 78 pic->iivpr8 = 0x810008; /* enable pcie1 interrupts */ 79 debug("iivpr8@%p = %x\n", &pic->iivpr8, pic->iivpr8); 80 #endif 81 #if defined(CONFIG_PCI2) || defined(CONFIG_PCIE2) 82 pic->iivpr9 = 0x810009; /* enable pcie2 interrupts */ 83 debug("iivpr9@%p = %x\n", &pic->iivpr9, pic->iivpr9); 84 #endif 85 86 pic->ctpr = 0; /* 40080 clear current task priority register */ 87 #endif 88 89 #ifdef CONFIG_POST 90 post_word_store(post_word); 91 #endif 92 93 return 0; 94 } 95 96 /* 97 * timer_interrupt - gets called when the decrementer overflows, 98 * with interrupts disabled. 99 * Trivial implementation - no need to be really accurate. 100 */ 101 void timer_interrupt_cpu(struct pt_regs *regs) 102 { 103 /* nothing to do here */ 104 } 105 106 /* 107 * Install and free a interrupt handler. Not implemented yet. 108 */ 109 void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg) 110 { 111 } 112 113 void irq_free_handler(int vec) 114 { 115 } 116 117 /* 118 * irqinfo - print information about PCI devices,not implemented. 119 */ 120 int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 121 { 122 return 0; 123 } 124 125 /* 126 * Handle external interrupts 127 */ 128 void external_interrupt(struct pt_regs *regs) 129 { 130 puts("external_interrupt (oops!)\n"); 131 } 132