1 #ifndef __ASM_MACH_APIC_H
2 #define __ASM_MACH_APIC_H
6 #define esr_disable (1)
7 #define NO_BALANCE_IRQ (0)
9 /* In clustered mode, the high nibble of APIC ID is a cluster number.
10 * The low nibble is a 4-bit bitmap. */
11 #define XAPIC_DEST_CPUS_SHIFT 4
12 #define XAPIC_DEST_CPUS_MASK ((1u << XAPIC_DEST_CPUS_SHIFT) - 1)
13 #define XAPIC_DEST_CLUSTER_MASK (XAPIC_DEST_CPUS_MASK << XAPIC_DEST_CPUS_SHIFT)
15 #define APIC_DFR_VALUE (APIC_DFR_CLUSTER)
17 static inline cpumask_t target_cpus(void)
19 /* CPU_MASK_ALL (0xff) has undefined behaviour with
20 * dest_LowestPrio mode logical clustered apic interrupt routing
21 * Just start on cpu 0. IRQ balancing will spread load
23 return cpumask_of_cpu(0);
25 #define TARGET_CPUS (target_cpus())
27 #define INT_DELIVERY_MODE (dest_LowestPrio)
28 #define INT_DEST_MODE 1 /* logical delivery broadcast to all procs */
30 static inline unsigned long check_apicid_used(physid_mask_t bitmap, int apicid)
35 /* we don't use the phys_cpu_present_map to indicate apicid presence */
36 static inline unsigned long check_apicid_present(int bit)
41 #define apicid_cluster(apicid) ((apicid) & XAPIC_DEST_CLUSTER_MASK)
43 extern u8 bios_cpu_apicid[];
44 extern u8 cpu_2_logical_apicid[];
46 static inline void init_apic_ldr(void)
48 unsigned long val, id;
50 u8 my_id = (u8)hard_smp_processor_id();
51 u8 my_cluster = (u8)apicid_cluster(my_id);
56 /* Create logical APIC IDs by counting CPUs already in cluster. */
57 for (count = 0, i = NR_CPUS; --i >= 0; ) {
58 lid = cpu_2_logical_apicid[i];
59 if (lid != BAD_APICID && apicid_cluster(lid) == my_cluster)
63 /* We only have a 4 wide bitmap in cluster mode. If a deranged
64 * BIOS puts 5 CPUs in one APIC cluster, we're hosed. */
65 BUG_ON(count >= XAPIC_DEST_CPUS_SHIFT);
66 id = my_cluster | (1UL << count);
67 apic_write_around(APIC_DFR, APIC_DFR_VALUE);
68 val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
69 val |= SET_APIC_LOGICAL_ID(id);
70 apic_write_around(APIC_LDR, val);
73 static inline int multi_timer_check(int apic, int irq)
78 static inline int apic_id_registered(void)
83 static inline void setup_apic_routing(void)
85 printk("Enabling APIC mode: Summit. Using %d I/O APICs\n",
89 static inline int apicid_to_node(int logical_apicid)
92 return apicid_2_node[hard_smp_processor_id()];
98 /* Mapping from cpu number to logical apicid */
99 static inline int cpu_to_logical_apicid(int cpu)
104 return (int)cpu_2_logical_apicid[cpu];
106 return logical_smp_processor_id();
110 static inline int cpu_present_to_apicid(int mps_cpu)
112 if (mps_cpu < NR_CPUS)
113 return (int)bios_cpu_apicid[mps_cpu];
118 static inline physid_mask_t ioapic_phys_id_map(physid_mask_t phys_id_map)
120 /* For clustered we don't have a good way to do this yet - hack */
121 return physids_promote(0x0F);
124 static inline physid_mask_t apicid_to_cpu_present(int apicid)
126 return physid_mask_of_physid(0);
129 static inline int mpc_apic_id(struct mpc_config_processor *m,
130 struct mpc_config_translation *translation_record)
132 printk("Processor #%d %ld:%ld APIC version %d\n",
134 (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
135 (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
137 return (m->mpc_apicid);
140 static inline void setup_portio_remap(void)
144 static inline int check_phys_apicid_present(int boot_cpu_physical_apicid)
149 static inline void enable_apic_mode(void)
153 static inline unsigned int cpu_mask_to_apicid(cpumask_t cpumask)
160 num_bits_set = cpus_weight(cpumask);
161 /* Return id to all */
162 if (num_bits_set == NR_CPUS)
165 * The cpus in the mask must all be on the apic cluster. If are not
166 * on the same apicid cluster return default value of TARGET_CPUS.
168 cpu = first_cpu(cpumask);
169 apicid = cpu_to_logical_apicid(cpu);
170 while (cpus_found < num_bits_set) {
171 if (cpu_isset(cpu, cpumask)) {
172 int new_apicid = cpu_to_logical_apicid(cpu);
173 if (apicid_cluster(apicid) !=
174 apicid_cluster(new_apicid)){
175 printk ("%s: Not a valid mask!\n",__FUNCTION__);
178 apicid = apicid | new_apicid;
186 /* cpuid returns the value latched in the HW at reset, not the APIC ID
187 * register's value. For any box whose BIOS changes APIC IDs, like
188 * clustered APIC systems, we must use hard_smp_processor_id.
190 * See Intel's IA-32 SW Dev's Manual Vol2 under CPUID.
192 static inline u32 phys_pkg_id(u32 cpuid_apic, int index_msb)
194 return hard_smp_processor_id() >> index_msb;
197 #endif /* __ASM_MACH_APIC_H */