forked from luck/tmp_suning_uos_patched
fd582ec88e
This fixes up a variety of minor problems in compiling with ARCH=ppc arising from using the merged versions of various header files. A lot of the changes are just adding #include <asm/machdep.h> to files that use ppc_md or smp_ops_t. This also arranges for us to use semaphore.c, vecemu.c, vector.S and fpu.S from arch/powerpc/kernel when compiling with ARCH=ppc. Signed-off-by: Paul Mackerras <paulus@samba.org>
100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
/*
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* Smp support for CHRP machines.
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*
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* Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great
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* deal of code from the sparc and intel versions.
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*
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* Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
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*
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/smp.h>
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#include <linux/smp_lock.h>
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#include <linux/interrupt.h>
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#include <linux/kernel_stat.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/spinlock.h>
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#include <asm/ptrace.h>
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#include <asm/atomic.h>
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#include <asm/irq.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/sections.h>
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#include <asm/io.h>
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#include <asm/prom.h>
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#include <asm/smp.h>
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#include <asm/residual.h>
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#include <asm/time.h>
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#include <asm/open_pic.h>
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#include <asm/machdep.h>
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extern unsigned long smp_chrp_cpu_nr;
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static int __init
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smp_chrp_probe(void)
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{
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if (smp_chrp_cpu_nr > 1)
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openpic_request_IPIs();
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return smp_chrp_cpu_nr;
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}
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static void __devinit
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smp_chrp_kick_cpu(int nr)
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{
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*(unsigned long *)KERNELBASE = nr;
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asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
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}
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static void __devinit
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smp_chrp_setup_cpu(int cpu_nr)
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{
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if (OpenPIC_Addr)
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do_openpic_setup_cpu();
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}
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static DEFINE_SPINLOCK(timebase_lock);
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static unsigned int timebase_upper = 0, timebase_lower = 0;
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void __devinit
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smp_chrp_give_timebase(void)
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{
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spin_lock(&timebase_lock);
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call_rtas("freeze-time-base", 0, 1, NULL);
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timebase_upper = get_tbu();
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timebase_lower = get_tbl();
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spin_unlock(&timebase_lock);
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while (timebase_upper || timebase_lower)
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barrier();
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call_rtas("thaw-time-base", 0, 1, NULL);
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}
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void __devinit
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smp_chrp_take_timebase(void)
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{
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while (!(timebase_upper || timebase_lower))
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barrier();
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spin_lock(&timebase_lock);
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set_tb(timebase_upper, timebase_lower);
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timebase_upper = 0;
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timebase_lower = 0;
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spin_unlock(&timebase_lock);
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printk("CPU %i taken timebase\n", smp_processor_id());
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}
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/* CHRP with openpic */
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struct smp_ops_t chrp_smp_ops = {
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.message_pass = smp_openpic_message_pass,
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.probe = smp_chrp_probe,
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.kick_cpu = smp_chrp_kick_cpu,
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.setup_cpu = smp_chrp_setup_cpu,
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.give_timebase = smp_chrp_give_timebase,
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.take_timebase = smp_chrp_take_timebase,
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};
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