- Introduce a cpu_ipi_single() function pointer in order to send IPIs

  to single CPUs more efficiently with Cheetah(-class) and Jalapeno CPUs.
  Besides being used to implement the ipi_cpu() introduced in r210939,
  cpu_ipi_single() will also be used internally by the sparc64 MD code.
- Factor out the Jalapeno support from the Cheetah IPI send functions
  in order to be able to more easily and efficiently implement support
  for more than 32 target CPUs as well as a workaround for Cheetah+
  erratum 25 for the latter.

1 files changed, 5 insertions, 6 deletions

diff --git a/sys/sparc64/include/smp.h b/sys/sparc64/include/smp.h
index 315e5f6..dcefabf 100644
--- a/sys/sparc64/include/smp.h
+++ b/sys/sparc64/include/smp.h
@@ -98,6 +98,8 @@ void	cpu_mp_shutdown(void);
 
 typedef	void cpu_ipi_selected_t(u_int, u_long, u_long, u_long);
 extern	cpu_ipi_selected_t *cpu_ipi_selected;
+typedef	void cpu_ipi_single_t(u_int, u_long, u_long, u_long);
+extern	cpu_ipi_single_t *cpu_ipi_single;
 
 void	mp_init(u_int cpu_impl);
 
@@ -139,11 +141,7 @@ static __inline void
 ipi_cpu(int cpu, u_int ipi)
 {
 
-	/*
-	 * XXX: Not ideal, but would require more work to add a cpu_ipi_cpu
-	 * function pointer.
-	 */
-	cpu_ipi_selected(1 << cpu, 0, (u_long)tl_ipi_level, ipi);
+	cpu_ipi_single(cpu, 0, (u_long)tl_ipi_level, ipi);
 }
 
 #if defined(_MACHINE_PMAP_H_) && defined(_SYS_MUTEX_H_)
@@ -243,7 +241,8 @@ ipi_tlb_range_demap(struct pmap *pm, vm_offset_t start, vm_offset_t end)
 	ita->ita_pmap = pm;
 	ita->ita_start = start;
 	ita->ita_end = end;
-	cpu_ipi_selected(cpus, 0, (u_long)tl_ipi_tlb_range_demap, (u_long)ita);
+	cpu_ipi_selected(cpus, 0, (u_long)tl_ipi_tlb_range_demap,
+	    (u_long)ita);
 	return (&ita->ita_mask);
 }