1 files changed, 185 insertions, 0 deletions

diff --git a/include/asm-x86/summit/apic.h b/include/asm-x86/summit/apic.h
new file mode 100644
index 000000000000..394b00bb5e72
--- /dev/null
+++ b/include/asm-x86/summit/apic.h
@@ -0,0 +1,185 @@
+#ifndef __ASM_SUMMIT_APIC_H
+#define __ASM_SUMMIT_APIC_H
+
+#include <asm/smp.h>
+
+#define esr_disable (1)
+#define NO_BALANCE_IRQ (0)
+
+/* In clustered mode, the high nibble of APIC ID is a cluster number.
+ * The low nibble is a 4-bit bitmap. */
+#define XAPIC_DEST_CPUS_SHIFT   4
+#define XAPIC_DEST_CPUS_MASK    ((1u << XAPIC_DEST_CPUS_SHIFT) - 1)
+#define XAPIC_DEST_CLUSTER_MASK (XAPIC_DEST_CPUS_MASK << XAPIC_DEST_CPUS_SHIFT)
+
+#define APIC_DFR_VALUE  (APIC_DFR_CLUSTER)
+
+static inline cpumask_t target_cpus(void)
+{
+        /* CPU_MASK_ALL (0xff) has undefined behaviour with
+         * dest_LowestPrio mode logical clustered apic interrupt routing
+         * Just start on cpu 0.  IRQ balancing will spread load
+         */
+        return cpumask_of_cpu(0);
+}
+#define TARGET_CPUS     (target_cpus())
+
+#define INT_DELIVERY_MODE (dest_LowestPrio)
+#define INT_DEST_MODE 1     /* logical delivery broadcast to all procs */
+
+static inline unsigned long check_apicid_used(physid_mask_t bitmap, int apicid)
+{
+        return 0;
+}
+
+/* we don't use the phys_cpu_present_map to indicate apicid presence */
+static inline unsigned long check_apicid_present(int bit)
+{
+        return 1;
+}
+
+#define apicid_cluster(apicid) ((apicid) & XAPIC_DEST_CLUSTER_MASK)
+
+extern u8 cpu_2_logical_apicid[];
+
+static inline void init_apic_ldr(void)
+{
+        unsigned long val, id;
+        int count = 0;
+        u8 my_id = (u8)hard_smp_processor_id();
+        u8 my_cluster = (u8)apicid_cluster(my_id);
+#ifdef CONFIG_SMP
+        u8 lid;
+        int i;
+
+        /* Create logical APIC IDs by counting CPUs already in cluster. */
+        for (count = 0, i = NR_CPUS; --i >= 0; ) {
+                lid = cpu_2_logical_apicid[i];
+                if (lid != BAD_APICID && apicid_cluster(lid) == my_cluster)
+                        ++count;
+        }
+#endif
+        /* We only have a 4 wide bitmap in cluster mode.  If a deranged
+         * BIOS puts 5 CPUs in one APIC cluster, we're hosed. */
+        BUG_ON(count >= XAPIC_DEST_CPUS_SHIFT);
+        id = my_cluster | (1UL << count);
+        apic_write(APIC_DFR, APIC_DFR_VALUE);
+        val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
+        val |= SET_APIC_LOGICAL_ID(id);
+        apic_write(APIC_LDR, val);
+}
+
+static inline int multi_timer_check(int apic, int irq)
+{
+        return 0;
+}
+
+static inline int apic_id_registered(void)
+{
+        return 1;
+}
+
+static inline void setup_apic_routing(void)
+{
+        printk("Enabling APIC mode:  Summit.  Using %d I/O APICs\n",
+                                                nr_ioapics);
+}
+
+static inline int apicid_to_node(int logical_apicid)
+{
+#ifdef CONFIG_SMP
+        return apicid_2_node[hard_smp_processor_id()];
+#else
+        return 0;
+#endif
+}
+
+/* Mapping from cpu number to logical apicid */
+static inline int cpu_to_logical_apicid(int cpu)
+{
+#ifdef CONFIG_SMP
+       if (cpu >= NR_CPUS)
+               return BAD_APICID;
+        return (int)cpu_2_logical_apicid[cpu];
+#else
+        return logical_smp_processor_id();
+#endif
+}
+
+static inline int cpu_present_to_apicid(int mps_cpu)
+{
+        if (mps_cpu < NR_CPUS)
+                return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
+        else
+                return BAD_APICID;
+}
+
+static inline physid_mask_t ioapic_phys_id_map(physid_mask_t phys_id_map)
+{
+        /* For clustered we don't have a good way to do this yet - hack */
+        return physids_promote(0x0F);
+}
+
+static inline physid_mask_t apicid_to_cpu_present(int apicid)
+{
+        return physid_mask_of_physid(0);
+}
+
+static inline void setup_portio_remap(void)
+{
+}
+
+static inline int check_phys_apicid_present(int boot_cpu_physical_apicid)
+{
+        return 1;
+}
+
+static inline void enable_apic_mode(void)
+{
+}
+
+static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask)
+{
+        int num_bits_set;
+        int cpus_found = 0;
+        int cpu;
+        int apicid;
+
+        num_bits_set = cpus_weight(cpumask);
+        /* Return id to all */
+        if (num_bits_set == NR_CPUS)
+                return (int) 0xFF;
+        /*
+         * The cpus in the mask must all be on the apic cluster.  If are not
+         * on the same apicid cluster return default value of TARGET_CPUS.
+         */
+        cpu = first_cpu(cpumask);
+        apicid = cpu_to_logical_apicid(cpu);
+        while (cpus_found < num_bits_set) {
+                if (cpu_isset(cpu, cpumask)) {
+                        int new_apicid = cpu_to_logical_apicid(cpu);
+                        if (apicid_cluster(apicid) !=
+                                        apicid_cluster(new_apicid)){
+                                printk ("%s: Not a valid mask!\n", __func__);
+                                return 0xFF;
+                        }
+                        apicid = apicid | new_apicid;
+                        cpus_found++;
+                }
+                cpu++;
+        }
+        return apicid;
+}
+
+/* cpuid returns the value latched in the HW at reset, not the APIC ID
+ * register's value.  For any box whose BIOS changes APIC IDs, like
+ * clustered APIC systems, we must use hard_smp_processor_id.
+ *
+ * See Intel's IA-32 SW Dev's Manual Vol2 under CPUID.
+ */
+static inline u32 phys_pkg_id(u32 cpuid_apic, int index_msb)
+{
+        return hard_smp_processor_id() >> index_msb;
+}
+
+#endif /* __ASM_SUMMIT_APIC_H */