[IA64-SGI] - Pass OS logical cpu number to the SN prom (bios)
authorJack Steiner <steiner@sgi.com>
Fri, 28 Apr 2006 01:01:05 +0000 (20:01 -0500)
committerTony Luck <tony.luck@intel.com>
Wed, 28 Jun 2006 16:56:55 +0000 (09:56 -0700)
Pass the OS logical cpu number to the PROM. This allows PROM
to log the OS logical cpu number in error records viewed thru POD.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
arch/ia64/sn/kernel/setup.c
include/asm-ia64/sn/sn_sal.h

index 93577ab..9757934 100644 (file)
@@ -577,7 +577,8 @@ void __init sn_cpu_init(void)
        int i;
        static int wars_have_been_checked;
 
-       if (smp_processor_id() == 0 && IS_MEDUSA()) {
+       cpuid = smp_processor_id();
+       if (cpuid == 0 && IS_MEDUSA()) {
                if (ia64_sn_is_fake_prom())
                        sn_prom_type = 2;
                else
@@ -597,6 +598,12 @@ void __init sn_cpu_init(void)
        sn_hub_info->as_shift = sn_hub_info->nasid_shift - 2;
 
        /*
+        * Don't check status. The SAL call is not supported on all PROMs
+        * but a failure is harmless.
+        */
+       (void) ia64_sn_set_cpu_number(cpuid);
+
+       /*
         * The boot cpu makes this call again after platform initialization is
         * complete.
         */
@@ -607,7 +614,6 @@ void __init sn_cpu_init(void)
                if (ia64_sn_get_prom_feature_set(i, &sn_prom_features[i]) != 0)
                        break;
 
-       cpuid = smp_processor_id();
        cpuphyid = get_sapicid();
 
        if (ia64_sn_get_sapic_info(cpuphyid, &nasid, &subnode, &slice))
index cd490b2..bd4452b 100644 (file)
@@ -85,6 +85,7 @@
 #define  SN_SAL_GET_PROM_FEATURE_SET              0x02000065
 #define  SN_SAL_SET_OS_FEATURE_SET                0x02000066
 #define  SN_SAL_INJECT_ERROR                      0x02000067
+#define  SN_SAL_SET_CPU_NUMBER                    0x02000068
 
 /*
  * Service-specific constants
@@ -1150,4 +1151,13 @@ sn_inject_error(u64 paddr, u64 *data, u64 *ecc)
        local_irq_restore(irq_flags);
        return ret_stuff.status;
 }
+
+static inline int
+ia64_sn_set_cpu_number(int cpu)
+{
+       struct ia64_sal_retval rv;
+
+       SAL_CALL_NOLOCK(rv, SN_SAL_SET_CPU_NUMBER, cpu, 0, 0, 0, 0, 0, 0);
+       return rv.status;
+}
 #endif /* _ASM_IA64_SN_SN_SAL_H */