MIPS64 SMP, compile only edition. Don't use yet ...

4 files changed, 91 insertions, 6 deletions

diff --git a/arch/mips64/kernel/Makefile b/arch/mips64/kernel/Makefile
index 0f70cba13..8fb09b994 100644
--- a/arch/mips64/kernel/Makefile
+++ b/arch/mips64/kernel/Makefile
@@ -25,6 +25,10 @@ ifdef CONFIG_BINFMT_ELF32
 O_OBJS += binfmt_elf32.o
 endif
 
+ifdef CONFIG_SMP
+O_OBJS += smp.o
+endif
+
 clean:
 
 include $(TOPDIR)/Rules.make
diff --git a/arch/mips64/kernel/entry.S b/arch/mips64/kernel/entry.S
index b869ed96b..e591fd845 100644
--- a/arch/mips64/kernel/entry.S
+++ b/arch/mips64/kernel/entry.S
@@ -1,4 +1,4 @@
-/* $Id: entry.S,v 1.4 2000/01/17 23:32:46 ralf Exp $
+/* $Id: entry.S,v 1.5 2000/02/23 00:41:00 ralf Exp $
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -33,10 +33,11 @@ reschedule:	jal	schedule
 
 FEXPORT(ret_from_sys_call)
 FEXPORT(ret_from_irq)
-#ifdef __SMP__
-#error Barffff...
-#else
 		la	t1, softirq_state
+#ifdef __SMP__
+		lwu	t0, TASK_PROCESSOR($28)
+		dsll	t0, t0, 5
+		daddu	t1, t0
 #endif
 		lw	t0, 0 (t1)
 		lw	t1, 4 (t1)		# unused delay slot
diff --git a/arch/mips64/kernel/setup.c b/arch/mips64/kernel/setup.c
index 2a7d8a894..316ad7c29 100644
--- a/arch/mips64/kernel/setup.c
+++ b/arch/mips64/kernel/setup.c
@@ -1,4 +1,4 @@
-/* $Id: setup.c,v 1.7 2000/02/04 07:40:24 ralf Exp $
+/* $Id: setup.c,v 1.8 2000/03/02 02:36:50 ralf Exp $
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -40,7 +40,7 @@
 #include <asm/sn/sn0/addrs.h>
 #endif
 
-struct mips_cpuinfo boot_cpu_data;
+struct cpuinfo_mips boot_cpu_data;
 
 #ifdef CONFIG_VT
 struct screen_info screen_info;
diff --git a/arch/mips64/kernel/smp.c b/arch/mips64/kernel/smp.c
new file mode 100644
index 000000000..c0cd75e9a
--- /dev/null
+++ b/arch/mips64/kernel/smp.c
@@ -0,0 +1,80 @@
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/threads.h>
+#include <linux/time.h>
+#include <linux/timex.h>
+
+#include <asm/atomic.h>
+#include <asm/processor.h>
+#include <asm/system.h>
+
+/* The 'big kernel lock' */
+spinlock_t kernel_flag = SPIN_LOCK_UNLOCKED;
+
+int smp_threads_ready = 0;
+
+void __init smp_boot_cpus(void)
+{
+}
+
+static atomic_t smp_commenced = ATOMIC_INIT(0);
+
+struct cpuinfo_mips cpu_data[NR_CPUS];
+
+int smp_num_cpus = 1;		/* Number that came online.  */
+
+void __init smp_commence(void)
+{
+	wmb();
+	atomic_set(&smp_commenced,1);
+}
+
+static void stop_this_cpu(void *dummy)
+{
+	/*
+	 * Remove this CPU
+	 */
+	for (;;);
+}
+
+void smp_send_stop(void)
+{
+	smp_call_function(stop_this_cpu, NULL, 1, 0);
+	smp_num_cpus = 1;
+}
+
+/*
+ * this function sends a 'reschedule' IPI to another CPU.
+ * it goes straight through and wastes no time serializing
+ * anything. Worst case is that we lose a reschedule ...
+ */
+void smp_send_reschedule(int cpu)
+{
+}
+
+int __cpu_number_map[NR_CPUS];
+int __cpu_logical_map[NR_CPUS];
+
+cycles_t cacheflush_time;
+
+/* Not really SMP stuff ... */
+int setup_profiling_timer(unsigned int multiplier)
+{
+}
+
+/*
+ * Run a function on all other CPUs.
+ *  <func>      The function to run. This must be fast and non-blocking.
+ *  <info>      An arbitrary pointer to pass to the function.
+ *  <retry>     If true, keep retrying until ready.
+ *  <wait>      If true, wait until function has completed on other CPUs.
+ *  [RETURNS]   0 on success, else a negative status code.
+ *
+ * Does not return until remote CPUs are nearly ready to execute <func>
+ * or are or have executed.
+ */
+int
+smp_call_function (void (*func) (void *info), void *info, int retry, int wait)
+{
+	/* XXX - kinda important ;-)  */
+}