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-rw-r--r--target/linux/ramips/patches-3.10/0205-MIPS-GIC-Send-IPIs-using-the-GIC.patch101
1 files changed, 101 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-3.10/0205-MIPS-GIC-Send-IPIs-using-the-GIC.patch b/target/linux/ramips/patches-3.10/0205-MIPS-GIC-Send-IPIs-using-the-GIC.patch
new file mode 100644
index 0000000000..01ac8757e3
--- /dev/null
+++ b/target/linux/ramips/patches-3.10/0205-MIPS-GIC-Send-IPIs-using-the-GIC.patch
@@ -0,0 +1,101 @@
+From 5a43b20db2fd18f8ea5f3a919d4bc9d9c2038c6c Mon Sep 17 00:00:00 2001
+From: "Steven J. Hill" <Steven.Hill@imgtec.com>
+Date: Wed, 25 Sep 2013 14:58:19 -0500
+Subject: [PATCH 205/215] MIPS: GIC: Send IPIs using the GIC.
+
+If a GIC present, then use it to send IPIs between the cores.
+
+Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
+---
+ arch/mips/kernel/smp-mt.c | 32 ++++++++++++++++++++++++++++++++
+ 1 file changed, 32 insertions(+)
+
+--- a/arch/mips/kernel/smp-mt.c
++++ b/arch/mips/kernel/smp-mt.c
+@@ -71,6 +71,7 @@ static unsigned int __init smvp_vpe_init
+
+ /* Record this as available CPU */
+ set_cpu_possible(tc, true);
++ set_cpu_present(tc, true);
+ __cpu_number_map[tc] = ++ncpu;
+ __cpu_logical_map[ncpu] = tc;
+ }
+@@ -112,12 +113,35 @@ static void __init smvp_tc_init(unsigned
+ write_tc_c0_tchalt(TCHALT_H);
+ }
+
++static void mp_send_ipi_single(int cpu, unsigned int action)
++{
++ unsigned long flags;
++
++ local_irq_save(flags);
++
++ switch (action) {
++ case SMP_CALL_FUNCTION:
++ gic_send_ipi(plat_ipi_call_int_xlate(cpu));
++ break;
++
++ case SMP_RESCHEDULE_YOURSELF:
++ gic_send_ipi(plat_ipi_resched_int_xlate(cpu));
++ break;
++ }
++
++ local_irq_restore(flags);
++}
++
+ static void vsmp_send_ipi_single(int cpu, unsigned int action)
+ {
+ int i;
+ unsigned long flags;
+ int vpflags;
+
++ if (gic_present) {
++ mp_send_ipi_single(cpu, action);
++ return;
++ }
+ local_irq_save(flags);
+
+ vpflags = dvpe(); /* can't access the other CPU's registers whilst MVPE enabled */
+@@ -164,6 +188,8 @@ static void __cpuinit vsmp_init_secondar
+
+ static void __cpuinit vsmp_smp_finish(void)
+ {
++ pr_debug("SMPMT: CPU%d: vsmp_smp_finish\n", smp_processor_id());
++
+ /* CDFIXME: remove this? */
+ write_c0_compare(read_c0_count() + (8* mips_hpt_frequency/HZ));
+
+@@ -178,6 +204,7 @@ static void __cpuinit vsmp_smp_finish(vo
+
+ static void vsmp_cpus_done(void)
+ {
++ pr_debug("SMPMT: CPU%d: vsmp_cpus_done\n", smp_processor_id());
+ }
+
+ /*
+@@ -191,6 +218,8 @@ static void vsmp_cpus_done(void)
+ static void __cpuinit vsmp_boot_secondary(int cpu, struct task_struct *idle)
+ {
+ struct thread_info *gp = task_thread_info(idle);
++ pr_debug("SMPMT: CPU%d: vsmp_boot_secondary cpu %d\n",
++ smp_processor_id(), cpu);
+ dvpe();
+ set_c0_mvpcontrol(MVPCONTROL_VPC);
+
+@@ -232,6 +261,7 @@ static void __init vsmp_smp_setup(void)
+ unsigned int mvpconf0, ntc, tc, ncpu = 0;
+ unsigned int nvpe;
+
++ pr_debug("SMPMT: CPU%d: vsmp_smp_setup\n", smp_processor_id());
+ #ifdef CONFIG_MIPS_MT_FPAFF
+ /* If we have an FPU, enroll ourselves in the FPU-full mask */
+ if (cpu_has_fpu)
+@@ -272,6 +302,8 @@ static void __init vsmp_smp_setup(void)
+
+ static void __init vsmp_prepare_cpus(unsigned int max_cpus)
+ {
++ pr_debug("SMPMT: CPU%d: vsmp_prepare_cpus %d\n",
++ smp_processor_id(), max_cpus);
+ mips_mt_set_cpuoptions();
+ }
+