| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 1 | /* |
| 2 | * Smp support for CHRP machines. |
| 3 | * |
| 4 | * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great |
| 5 | * deal of code from the sparc and intel versions. |
| 6 | * |
| 7 | * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> |
| 8 | * |
| 9 | */ |
| 10 | |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 11 | #include <linux/kernel.h> |
| 12 | #include <linux/sched.h> |
| 13 | #include <linux/smp.h> |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/kernel_stat.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/spinlock.h> |
| 19 | |
| 20 | #include <asm/ptrace.h> |
| Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 21 | #include <linux/atomic.h> |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 22 | #include <asm/irq.h> |
| 23 | #include <asm/page.h> |
| 24 | #include <asm/pgtable.h> |
| 25 | #include <asm/sections.h> |
| 26 | #include <asm/io.h> |
| 27 | #include <asm/prom.h> |
| 28 | #include <asm/smp.h> |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 29 | #include <asm/machdep.h> |
| Paul Mackerras | 80579e1 | 2005-10-27 22:42:04 +1000 | [diff] [blame] | 30 | #include <asm/mpic.h> |
| Paul Mackerras | 44aedfe | 2005-11-18 15:54:12 +1100 | [diff] [blame] | 31 | #include <asm/rtas.h> |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 32 | |
| Greg Kroah-Hartman | cad5cef | 2012-12-21 14:04:10 -0800 | [diff] [blame] | 33 | static int smp_chrp_kick_cpu(int nr) |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 34 | { |
| 35 | *(unsigned long *)KERNELBASE = nr; |
| 36 | asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory"); |
| Michael Ellerman | de30097 | 2011-04-11 21:46:19 +0000 | [diff] [blame] | 37 | |
| 38 | return 0; |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 39 | } |
| 40 | |
| Greg Kroah-Hartman | cad5cef | 2012-12-21 14:04:10 -0800 | [diff] [blame] | 41 | static void smp_chrp_setup_cpu(int cpu_nr) |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 42 | { |
| Paul Mackerras | 80579e1 | 2005-10-27 22:42:04 +1000 | [diff] [blame] | 43 | mpic_setup_this_cpu(); |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 44 | } |
| 45 | |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 46 | /* CHRP with openpic */ |
| 47 | struct smp_ops_t chrp_smp_ops = { |
| Paul Mackerras | 80579e1 | 2005-10-27 22:42:04 +1000 | [diff] [blame] | 48 | .message_pass = smp_mpic_message_pass, |
| Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 49 | .probe = smp_mpic_probe, |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 50 | .kick_cpu = smp_chrp_kick_cpu, |
| 51 | .setup_cpu = smp_chrp_setup_cpu, |
| Benjamin Herrenschmidt | c4007a2 | 2009-06-16 16:42:50 +0000 | [diff] [blame] | 52 | .give_timebase = rtas_give_timebase, |
| 53 | .take_timebase = rtas_take_timebase, |
| Paul Mackerras | bbd0abd | 2005-10-26 21:45:56 +1000 | [diff] [blame] | 54 | }; |