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 * SPDX-License-Identifier: GPL-2.0+ 16 */ 17 18 #include <common.h> 19 #include <mpc86xx.h> 20 #include <command.h> 21 #include <asm/processor.h> 22 #ifdef CONFIG_POST 23 #include <post.h> 24 #endif 25 26 void interrupt_init_cpu(unsigned *decrementer_count) 27 { 28 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR; 29 volatile ccsr_pic_t *pic = &immr->im_pic; 30 31 #ifdef CONFIG_POST 32 /* 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 35 * later. 36 */ 37 ulong post_word = post_word_load(); 38 #endif 39 40 pic->gcr = MPC86xx_PICGCR_RST; 41 while (pic->gcr & MPC86xx_PICGCR_RST) 42 ; 43 pic->gcr = MPC86xx_PICGCR_MODE; 44 45 *decrementer_count = get_tbclk() / CONFIG_SYS_HZ; 46 debug("interrupt init: tbclk() = %ld MHz, decrementer_count = %d\n", 47 (get_tbclk() / 1000000), 48 *decrementer_count); 49 50 #ifdef CONFIG_INTERRUPTS 51 52 pic->iivpr1 = 0x810001; /* 50220 enable mcm interrupts */ 53 debug("iivpr1@%p = %x\n", &pic->iivpr1, pic->iivpr1); 54 55 pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */ 56 debug("iivpr2@%p = %x\n", &pic->iivpr2, pic->iivpr2); 57 58 pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */ 59 debug("iivpr3@%p = %x\n", &pic->iivpr3, pic->iivpr3); 60 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); 64 #endif 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); 68 #endif 69 70 pic->ctpr = 0; /* 40080 clear current task priority register */ 71 #endif 72 73 #ifdef CONFIG_POST 74 post_word_store(post_word); 75 #endif 76 } 77 78 /* 79 * timer_interrupt - gets called when the decrementer overflows, 80 * with interrupts disabled. 81 * Trivial implementation - no need to be really accurate. 82 */ 83 void timer_interrupt_cpu(struct pt_regs *regs) 84 { 85 /* nothing to do here */ 86 } 87 88 /* 89 * Install and free a interrupt handler. Not implemented yet. 90 */ 91 void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg) 92 { 93 } 94 95 void irq_free_handler(int vec) 96 { 97 } 98 99 /* 100 * irqinfo - print information about PCI devices,not implemented. 101 */ 102 int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 103 { 104 return 0; 105 } 106 107 /* 108 * Handle external interrupts 109 */ 110 void external_interrupt(struct pt_regs *regs) 111 { 112 puts("external_interrupt (oops!)\n"); 113 } 114