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 <irq_func.h>
19 #include <log.h>
20 #include <mpc86xx.h>
21 #include <command.h>
22 #include <time.h>
23 #include <asm/processor.h>
24 #ifdef CONFIG_POST
25 #include <post.h>
26 #endif
27 #include <asm/ptrace.h>
28
interrupt_init_cpu(unsigned * decrementer_count)29 void interrupt_init_cpu(unsigned *decrementer_count)
30 {
31 volatile immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
32 volatile ccsr_pic_t *pic = &immr->im_pic;
33
34 #ifdef CONFIG_POST
35 /*
36 * The POST word is stored in the PIC's TFRR register which gets
37 * cleared when the PIC is reset. Save it off so we can restore it
38 * later.
39 */
40 ulong post_word = post_word_load();
41 #endif
42
43 pic->gcr = MPC86xx_PICGCR_RST;
44 while (pic->gcr & MPC86xx_PICGCR_RST)
45 ;
46 pic->gcr = MPC86xx_PICGCR_MODE;
47
48 *decrementer_count = get_tbclk() / CONFIG_SYS_HZ;
49 debug("interrupt init: tbclk() = %ld MHz, decrementer_count = %d\n",
50 (get_tbclk() / 1000000),
51 *decrementer_count);
52
53 #ifdef CONFIG_INTERRUPTS
54
55 pic->iivpr1 = 0x810001; /* 50220 enable mcm interrupts */
56 debug("iivpr1@%p = %x\n", &pic->iivpr1, pic->iivpr1);
57
58 pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */
59 debug("iivpr2@%p = %x\n", &pic->iivpr2, pic->iivpr2);
60
61 pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */
62 debug("iivpr3@%p = %x\n", &pic->iivpr3, pic->iivpr3);
63
64 #if defined(CONFIG_PCI1) || defined(CONFIG_PCIE1)
65 pic->iivpr8 = 0x810008; /* enable pcie1 interrupts */
66 debug("iivpr8@%p = %x\n", &pic->iivpr8, pic->iivpr8);
67 #endif
68 #if defined(CONFIG_PCI2) || defined(CONFIG_PCIE2)
69 pic->iivpr9 = 0x810009; /* enable pcie2 interrupts */
70 debug("iivpr9@%p = %x\n", &pic->iivpr9, pic->iivpr9);
71 #endif
72
73 pic->ctpr = 0; /* 40080 clear current task priority register */
74 #endif
75
76 #ifdef CONFIG_POST
77 post_word_store(post_word);
78 #endif
79 }
80
81 /*
82 * timer_interrupt - gets called when the decrementer overflows,
83 * with interrupts disabled.
84 * Trivial implementation - no need to be really accurate.
85 */
timer_interrupt_cpu(struct pt_regs * regs)86 void timer_interrupt_cpu(struct pt_regs *regs)
87 {
88 /* nothing to do here */
89 }
90
91 /*
92 * Install and free a interrupt handler. Not implemented yet.
93 */
irq_install_handler(int vec,interrupt_handler_t * handler,void * arg)94 void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
95 {
96 }
97
irq_free_handler(int vec)98 void irq_free_handler(int vec)
99 {
100 }
101
102 /*
103 * irqinfo - print information about PCI devices,not implemented.
104 */
do_irqinfo(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])105 int do_irqinfo(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
106 {
107 return 0;
108 }
109
110 /*
111 * Handle external interrupts
112 */
external_interrupt(struct pt_regs * regs)113 void external_interrupt(struct pt_regs *regs)
114 {
115 puts("external_interrupt(oops!)\n");
116 }
117