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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <smp/smp.h> |
29 | #include <smp/smp.h> |
- | 30 | #include <arch/smp/smp.h> |
|
- | 31 | #include <arch/smp/mps.h> |
|
- | 32 | #include <arch/smp/ap.h> |
|
30 | #include <arch/acpi/acpi.h> |
33 | #include <arch/acpi/acpi.h> |
31 | #include <arch/acpi/madt.h> |
34 | #include <arch/acpi/madt.h> |
32 | #include <arch/smp/mps.h> |
- | |
33 | #include <config.h> |
35 | #include <config.h> |
- | 36 | #include <synch/waitq.h> |
|
- | 37 | #include <arch/pm.h> |
|
- | 38 | #include <func.h> |
|
- | 39 | #include <panic.h> |
|
- | 40 | #include <debug.h> |
|
- | 41 | #include <arch/asm.h> |
|
- | 42 | #include <mm/frame.h> |
|
- | 43 | #include <mm/page.h> |
|
- | 44 | #include <mm/heap.h> |
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34 | 45 | ||
35 | #ifdef __SMP__ |
46 | #ifdef __SMP__ |
36 | 47 | ||
- | 48 | static struct smp_config_operations *ops = NULL; |
|
- | 49 | ||
37 | void smp_init(void) |
50 | void smp_init(void) |
38 | { |
51 | { |
39 | if (acpi_madt) { |
52 | if (acpi_madt) { |
40 | acpi_madt_parse(); |
53 | acpi_madt_parse(); |
41 | } |
54 | } |
42 | if (config.cpu_count == 1) |
55 | if (config.cpu_count == 1) { |
43 | mps_init(); |
56 | mps_init(); |
- | 57 | ops = &mps_config_operations; |
|
- | 58 | } |
|
44 | } |
59 | } |
45 | 60 | ||
- | 61 | /* |
|
- | 62 | * Kernel thread for bringing up application processors. It becomes clear |
|
- | 63 | * that we need an arrangement like this (AP's being initialized by a kernel |
|
- | 64 | * thread), for a thread has its dedicated stack. (The stack used during the |
|
- | 65 | * BSP initialization (prior the very first call to scheduler()) will be used |
|
- | 66 | * as an initialization stack for each AP.) |
|
- | 67 | */ |
|
- | 68 | void kmp(void *arg) |
|
- | 69 | { |
|
- | 70 | __address src, dst; |
|
- | 71 | int i; |
|
- | 72 | ||
- | 73 | ASSERT(ops != NULL); |
|
- | 74 | ||
- | 75 | waitq_initialize(&ap_completion_wq); |
|
- | 76 | ||
- | 77 | /* |
|
- | 78 | * We need to access data in frame 0. |
|
- | 79 | * We boldly make use of kernel address space mapping. |
|
- | 80 | */ |
|
- | 81 | ||
- | 82 | /* |
|
- | 83 | * Set the warm-reset vector to the real-mode address of 4K-aligned ap_boot() |
|
- | 84 | */ |
|
- | 85 | *((__u16 *) (PA2KA(0x467+0))) = ((__address) ap_boot) >> 4; /* segment */ |
|
- | 86 | *((__u16 *) (PA2KA(0x467+2))) = 0; /* offset */ |
|
- | 87 | ||
- | 88 | /* |
|
- | 89 | * Save 0xa to address 0xf of the CMOS RAM. |
|
- | 90 | * BIOS will not do the POST after the INIT signal. |
|
- | 91 | */ |
|
- | 92 | outb(0x70,0xf); |
|
- | 93 | outb(0x71,0xa); |
|
- | 94 | ||
- | 95 | cpu_priority_high(); |
|
- | 96 | ||
- | 97 | pic_disable_irqs(0xffff); |
|
- | 98 | apic_init(); |
|
- | 99 | ||
- | 100 | for (i = 0; i < ops->cpu_count(); i++) { |
|
- | 101 | struct descriptor *gdt_new; |
|
- | 102 | ||
- | 103 | /* |
|
- | 104 | * Skip processors marked unusable. |
|
- | 105 | */ |
|
- | 106 | if (!ops->cpu_enabled(i)) |
|
- | 107 | continue; |
|
- | 108 | ||
- | 109 | /* |
|
- | 110 | * The bootstrap processor is already up. |
|
- | 111 | */ |
|
- | 112 | if (ops->cpu_bootstrap(i)) |
|
- | 113 | continue; |
|
- | 114 | ||
- | 115 | if (ops->cpu_apic_id(i) == l_apic_id()) { |
|
- | 116 | printf("kmp: bad processor entry #%d, will not send IPI to myself\n", i); |
|
- | 117 | continue; |
|
- | 118 | } |
|
- | 119 | ||
- | 120 | /* |
|
- | 121 | * Prepare new GDT for CPU in question. |
|
- | 122 | */ |
|
- | 123 | if (!(gdt_new = (struct descriptor *) malloc(GDT_ITEMS*sizeof(struct descriptor)))) |
|
- | 124 | panic("couldn't allocate memory for GDT\n"); |
|
- | 125 | ||
- | 126 | memcopy(gdt, gdt_new, GDT_ITEMS*sizeof(struct descriptor)); |
|
- | 127 | memsetb(&gdt_new[TSS_DES], sizeof(struct descriptor), 0); |
|
- | 128 | gdtr.base = KA2PA((__address) gdt_new); |
|
- | 129 | ||
- | 130 | if (l_apic_send_init_ipi(ops->cpu_apic_id(i))) { |
|
- | 131 | /* |
|
- | 132 | * There may be just one AP being initialized at |
|
- | 133 | * the time. After it comes completely up, it is |
|
- | 134 | * supposed to wake us up. |
|
- | 135 | */ |
|
- | 136 | waitq_sleep(&ap_completion_wq); |
|
- | 137 | cpu_priority_high(); |
|
- | 138 | } |
|
- | 139 | else { |
|
- | 140 | printf("INIT IPI for l_apic%d failed\n", ops->cpu_apic_id(i)); |
|
- | 141 | } |
|
- | 142 | } |
|
- | 143 | ||
- | 144 | /* |
|
- | 145 | * Wakeup the kinit thread so that |
|
- | 146 | * system initialization can go on. |
|
- | 147 | */ |
|
- | 148 | waitq_wakeup(&kmp_completion_wq, WAKEUP_FIRST); |
|
- | 149 | } |
|
46 | 150 | ||
47 | #endif /* __SMP__ */ |
151 | #endif /* __SMP__ */ |