[IA64-SGI] - Pass OS logical cpu number to the SN prom (bios)

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>

diff --git a/arch/ia64/sn/kernel/setup.c b/arch/ia64/sn/kernel/setup.c
index 93577abae36da488e4e7bbe87accbf4436a26f80..97579348a54968dbc23665368dc84035dc086934 100644 (file)
--- a/arch/ia64/sn/kernel/setup.c
+++ b/arch/ia64/sn/kernel/setup.c
@@ -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
@@ -596,6 +597,12 @@ void __init sn_cpu_init(void)
                BUG();
        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))

diff --git a/include/asm-ia64/sn/sn_sal.h b/include/asm-ia64/sn/sn_sal.h
index cd490b20d59268cc9723b7b23dd036d1c215d078..bd4452bda357b8e58837daf43093be52d147bade 100644 (file)
--- a/include/asm-ia64/sn/sn_sal.h
+++ b/include/asm-ia64/sn/sn_sal.h
@@ -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 */