2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * (C) Copyright 2002 (440 port)
6 * Scott McNutt, Artesyn Communication Producs, smcnutt@artsyncp.com
8 * (C) Copyright 2003 Motorola Inc. (MPC85xx port)
9 * Xianghua Xiao (X.Xiao@motorola.com)
11 * See file CREDITS for list of people who contributed to this
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
33 #include <asm/processor.h>
34 #include <ppc_asm.tmpl>
36 unsigned decrementer_count; /* count value for 1e6/HZ microseconds */
38 static __inline__ unsigned long get_msr(void)
42 asm volatile("mfmsr %0" : "=r" (msr) :);
46 static __inline__ void set_msr(unsigned long msr)
48 asm volatile("mtmsr %0" : : "r" (msr));
49 asm volatile("isync");
52 static __inline__ unsigned long get_dec (void)
56 asm volatile ("mfdec %0":"=r" (val):);
62 static __inline__ void set_dec (unsigned long val)
65 asm volatile ("mtdec %0"::"r" (val));
68 void enable_interrupts (void)
70 set_msr (get_msr() | MSR_EE);
73 /* returns flag if MSR_EE was set before */
74 int disable_interrupts (void)
76 ulong msr = get_msr();
77 set_msr (msr & ~MSR_EE);
78 return ((msr & MSR_EE) != 0);
81 int interrupt_init (void)
83 volatile immap_t *immr = (immap_t *)CFG_IMMR;
85 immr->im_pic.gcr = MPC85xx_PICGCR_RST;
86 while (immr->im_pic.gcr & MPC85xx_PICGCR_RST);
87 immr->im_pic.gcr = MPC85xx_PICGCR_M;
88 decrementer_count = get_tbclk() / CFG_HZ;
89 mtspr(SPRN_TCR, TCR_PIE);
90 set_dec (decrementer_count);
91 set_msr (get_msr () | MSR_EE);
93 #ifdef CONFIG_INTERRUPTS
94 volatile ccsr_pic_t *pic = &immr->im_pic;
96 pic->iivpr1 = 0x810002; /* 50220 enable ecm interrupts */
97 debug("iivpr1@%x = %x\n",&pic->iivpr1, pic->iivpr1);
99 pic->iivpr2 = 0x810002; /* 50240 enable ddr interrupts */
100 debug("iivpr2@%x = %x\n",&pic->iivpr2, pic->iivpr2);
102 pic->iivpr3 = 0x810003; /* 50260 enable lbc interrupts */
103 debug("iivpr3@%x = %x\n",&pic->iivpr3, pic->iivpr3);
106 pic->iivpr8 = 0x810008; /* enable pci1 interrupts */
107 debug("iivpr8@%x = %x\n",&pic->iivpr8, pic->iivpr8);
109 #if defined(CONFIG_PCI2) || defined(CONFIG_PCIE2)
110 pic->iivpr9 = 0x810009; /* enable pci1 interrupts */
111 debug("iivpr9@%x = %x\n",&pic->iivpr9, pic->iivpr9);
114 pic->iivpr10 = 0x81000a; /* enable pcie1 interrupts */
115 debug("iivpr10@%x = %x\n",&pic->iivpr10, pic->iivpr10);
118 pic->iivpr11 = 0x81000b; /* enable pcie3 interrupts */
119 debug("iivpr11@%x = %x\n",&pic->iivpr11, pic->iivpr11);
122 pic->ctpr=0; /* 40080 clear current task priority register */
129 * Install and free a interrupt handler. Not implemented yet.
133 irq_install_handler(int vec, interrupt_handler_t *handler, void *arg)
139 irq_free_handler(int vec)
144 /****************************************************************************/
147 volatile ulong timestamp = 0;
150 * timer_interrupt - gets called when the decrementer overflows,
151 * with interrupts disabled.
152 * Trivial implementation - no need to be really accurate.
154 void timer_interrupt(struct pt_regs *regs)
157 set_dec (decrementer_count);
158 mtspr(SPRN_TSR, TSR_PIS);
159 #if defined(CONFIG_WATCHDOG)
160 if ((timestamp % 1000) == 0)
161 reset_85xx_watchdog();
162 #endif /* CONFIG_WATCHDOG */
165 void reset_timer (void)
170 ulong get_timer (ulong base)
172 return (timestamp - base);
175 void set_timer (ulong t)
180 #if defined(CONFIG_CMD_IRQ)
182 /*******************************************************************************
184 * irqinfo - print information about PCI devices,not implemented.
188 do_irqinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
190 printf ("\nInterrupt-unsupported:\n");