1 /*
2 * APIC driver for the Unisys ES7000 chipset.
3 */
4 #define APIC_DEFINITION 1
5 #include <linux/threads.h>
6 #include <linux/cpumask.h>
7 #include <asm/mpspec.h>
8 #include <asm/genapic.h>
9 #include <asm/fixmap.h>
10 #include <asm/apicdef.h>
11 #include <linux/kernel.h>
12 #include <linux/string.h>
13 #include <linux/init.h>
14 #include <asm/es7000/apicdef.h>
15 #include <linux/smp.h>
16 #include <asm/es7000/apic.h>
17 #include <asm/es7000/ipi.h>
18 #include <asm/es7000/mpparse.h>
19 #include <asm/mach-default/mach_wakecpu.h>
20
es7000_update_genapic_to_cluster(void)21 void __init es7000_update_genapic_to_cluster(void)
22 {
23 genapic->target_cpus = target_cpus_cluster;
24 genapic->int_delivery_mode = INT_DELIVERY_MODE_CLUSTER;
25 genapic->int_dest_mode = INT_DEST_MODE_CLUSTER;
26 genapic->no_balance_irq = NO_BALANCE_IRQ_CLUSTER;
27
28 genapic->init_apic_ldr = init_apic_ldr_cluster;
29
30 genapic->cpu_mask_to_apicid = cpu_mask_to_apicid_cluster;
31 }
32
probe_es7000(void)33 static int probe_es7000(void)
34 {
35 /* probed later in mptable/ACPI hooks */
36 return 0;
37 }
38
39 extern void es7000_sw_apic(void);
enable_apic_mode(void)40 static void __init enable_apic_mode(void)
41 {
42 es7000_sw_apic();
43 return;
44 }
45
46 static __init int
mps_oem_check(struct mpc_table * mpc,char * oem,char * productid)47 mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
48 {
49 if (mpc->oemptr) {
50 struct mpc_oemtable *oem_table =
51 (struct mpc_oemtable *)mpc->oemptr;
52 if (!strncmp(oem, "UNISYS", 6))
53 return parse_unisys_oem((char *)oem_table);
54 }
55 return 0;
56 }
57
58 #ifdef CONFIG_ACPI
59 /* Hook from generic ACPI tables.c */
acpi_madt_oem_check(char * oem_id,char * oem_table_id)60 static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
61 {
62 unsigned long oem_addr = 0;
63 int check_dsdt;
64 int ret = 0;
65
66 /* check dsdt at first to avoid clear fix_map for oem_addr */
67 check_dsdt = es7000_check_dsdt();
68
69 if (!find_unisys_acpi_oem_table(&oem_addr)) {
70 if (check_dsdt)
71 ret = parse_unisys_oem((char *)oem_addr);
72 else {
73 setup_unisys();
74 ret = 1;
75 }
76 /*
77 * we need to unmap it
78 */
79 unmap_unisys_acpi_oem_table(oem_addr);
80 }
81 return ret;
82 }
83 #else
acpi_madt_oem_check(char * oem_id,char * oem_table_id)84 static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
85 {
86 return 0;
87 }
88 #endif
89
vector_allocation_domain(int cpu,cpumask_t * retmask)90 static void vector_allocation_domain(int cpu, cpumask_t *retmask)
91 {
92 /* Careful. Some cpus do not strictly honor the set of cpus
93 * specified in the interrupt destination when using lowest
94 * priority interrupt delivery mode.
95 *
96 * In particular there was a hyperthreading cpu observed to
97 * deliver interrupts to the wrong hyperthread when only one
98 * hyperthread was specified in the interrupt desitination.
99 */
100 *retmask = (cpumask_t){ { [0] = APIC_ALL_CPUS, } };
101 }
102
103 struct genapic __initdata_refok apic_es7000 = APIC_INIT("es7000", probe_es7000);
104