diff options
Diffstat (limited to 'arch/ppc/platforms/chrp_smp.c')
-rw-r--r-- | arch/ppc/platforms/chrp_smp.c | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/arch/ppc/platforms/chrp_smp.c b/arch/ppc/platforms/chrp_smp.c deleted file mode 100644 index 97e539557ec..00000000000 --- a/arch/ppc/platforms/chrp_smp.c +++ /dev/null @@ -1,99 +0,0 @@ -/* - * Smp support for CHRP machines. - * - * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great - * deal of code from the sparc and intel versions. - * - * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu> - * - */ - -#include <linux/config.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/smp.h> -#include <linux/smp_lock.h> -#include <linux/interrupt.h> -#include <linux/kernel_stat.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/spinlock.h> - -#include <asm/ptrace.h> -#include <asm/atomic.h> -#include <asm/irq.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/sections.h> -#include <asm/io.h> -#include <asm/prom.h> -#include <asm/smp.h> -#include <asm/residual.h> -#include <asm/time.h> -#include <asm/open_pic.h> -#include <asm/machdep.h> - -extern unsigned long smp_chrp_cpu_nr; - -static int __init -smp_chrp_probe(void) -{ - if (smp_chrp_cpu_nr > 1) - openpic_request_IPIs(); - - return smp_chrp_cpu_nr; -} - -static void __devinit -smp_chrp_kick_cpu(int nr) -{ - *(unsigned long *)KERNELBASE = nr; - asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory"); -} - -static void __devinit -smp_chrp_setup_cpu(int cpu_nr) -{ - if (OpenPIC_Addr) - do_openpic_setup_cpu(); -} - -static DEFINE_SPINLOCK(timebase_lock); -static unsigned int timebase_upper = 0, timebase_lower = 0; - -void __devinit -smp_chrp_give_timebase(void) -{ - spin_lock(&timebase_lock); - call_rtas("freeze-time-base", 0, 1, NULL); - timebase_upper = get_tbu(); - timebase_lower = get_tbl(); - spin_unlock(&timebase_lock); - - while (timebase_upper || timebase_lower) - barrier(); - call_rtas("thaw-time-base", 0, 1, NULL); -} - -void __devinit -smp_chrp_take_timebase(void) -{ - while (!(timebase_upper || timebase_lower)) - barrier(); - spin_lock(&timebase_lock); - set_tb(timebase_upper, timebase_lower); - timebase_upper = 0; - timebase_lower = 0; - spin_unlock(&timebase_lock); - printk("CPU %i taken timebase\n", smp_processor_id()); -} - -/* CHRP with openpic */ -struct smp_ops_t chrp_smp_ops = { - .message_pass = smp_openpic_message_pass, - .probe = smp_chrp_probe, - .kick_cpu = smp_chrp_kick_cpu, - .setup_cpu = smp_chrp_setup_cpu, - .give_timebase = smp_chrp_give_timebase, - .take_timebase = smp_chrp_take_timebase, -}; |