1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2000-2002 4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 5 * 6 * (C) Copyright 2002 (440 port) 7 * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com 8 * 9 * (C) Copyright 2003 Motorola Inc. (MPC85xx port) 10 * Xianghua Xiao (X.Xiao@motorola.com) 11 * 12 * (C) Copyright 2004, 2007 Freescale Semiconductor. (MPC86xx Port) 13 * Jeff Brown 14 * Srikanth Srinivasan (srikanth.srinivasan@freescale.com) 15 */ 16 17 #include <common.h> 18 #include <mpc86xx.h> 19 #include <command.h> 20 #include <asm/processor.h> 21 #ifdef CONFIG_POST 22 #include <post.h> 23 #endif 24 25 void interrupt_init_cpu(unsigned *decrementer_count) 26 { 27 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR; 28 volatile ccsr_pic_t *pic = &immr->im_pic; 29 30 #ifdef CONFIG_POST 31 /* 32 * The POST word is stored in the PIC's TFRR register which gets 33 * cleared when the PIC is reset. Save it off so we can restore it 34 * later. 35 */ 36 ulong post_word = post_word_load(); 37 #endif 38 39 pic->gcr = MPC86xx_PICGCR_RST; 40 while (pic->gcr & MPC86xx_PICGCR_RST) 41 ; 42 pic->gcr = MPC86xx_PICGCR_MODE; 43 44 *decrementer_count = get_tbclk() / CONFIG_SYS_HZ; 45 debug("interrupt init: tbclk() = %ld MHz, decrementer_count = %d\n", 46 (get_tbclk() / 1000000), 47 *decrementer_count); 48 49 #ifdef CONFIG_INTERRUPTS 50 51 pic->iivpr1 = 0x810001; /* 50220 enable mcm interrupts */ 52 debug("iivpr1@%p = %x\n", &pic->iivpr1, pic->iivpr1); 53 54 pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */ 55 debug("iivpr2@%p = %x\n", &pic->iivpr2, pic->iivpr2); 56 57 pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */ 58 debug("iivpr3@%p = %x\n", &pic->iivpr3, pic->iivpr3); 59 60 #if defined(CONFIG_PCI1) || defined(CONFIG_PCIE1) 61 pic->iivpr8 = 0x810008; /* enable pcie1 interrupts */ 62 debug("iivpr8@%p = %x\n", &pic->iivpr8, pic->iivpr8); 63 #endif 64 #if defined(CONFIG_PCI2) || defined(CONFIG_PCIE2) 65 pic->iivpr9 = 0x810009; /* enable pcie2 interrupts */ 66 debug("iivpr9@%p = %x\n", &pic->iivpr9, pic->iivpr9); 67 #endif 68 69 pic->ctpr = 0; /* 40080 clear current task priority register */ 70 #endif 71 72 #ifdef CONFIG_POST 73 post_word_store(post_word); 74 #endif 75 } 76 77 /* 78 * timer_interrupt - gets called when the decrementer overflows, 79 * with interrupts disabled. 80 * Trivial implementation - no need to be really accurate. 81 */ 82 void timer_interrupt_cpu(struct pt_regs *regs) 83 { 84 /* nothing to do here */ 85 } 86 87 /* 88 * Install and free a interrupt handler. Not implemented yet. 89 */ 90 void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg) 91 { 92 } 93 94 void irq_free_handler(int vec) 95 { 96 } 97 98 /* 99 * irqinfo - print information about PCI devices,not implemented. 100 */ 101 int do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 102 { 103 return 0; 104 } 105 106 /* 107 * Handle external interrupts 108 */ 109 void external_interrupt(struct pt_regs *regs) 110 { 111 puts("external_interrupt (oops!)\n"); 112 } 113