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检测处理器核心数量

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This commit is contained in:
fslongjin
2022-04-04 18:42:22 +08:00
parent e667fff256
commit 60dc9f4932
10 changed files with 103 additions and 35 deletions
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35
kernel/driver/interrupt/apic/apic.c
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@ -24,7 +24,6 @@ void apic_io_apic_init()
{
ul madt_addr;
kdebug("madt_addr = %#018lx", (ul)madt_addr);
acpi_iter_SDT(acpi_get_MADT, &madt_addr);
madt = (struct acpi_Multiple_APIC_Description_Table_t *)madt_addr;
@ -453,4 +452,38 @@ void apic_ioapic_edge_ack(ul irq_num) // 边沿触发
"movq $0x80b, %%rcx \n\t"
"wrmsr \n\t" ::
: "memory");
}
/**
* @brief 读取指定类型的 Interrupt Control Structure
*
* @param type ics的类型
* @param ret_vaddr 对应的ICS的虚拟地址数组
* @param total 返回数组的元素总个数
* @return uint
*/
uint apic_get_ics(const uint type, ul *ret_vaddr[], uint *total)
{
void *ent = (void *)(madt) + sizeof(struct acpi_Multiple_APIC_Description_Table_t);
struct apic_Interrupt_Controller_Structure_header_t *header = (struct apic_Interrupt_Controller_Structure_header_t *)ent;
bool flag = false;
uint cnt = 0;
while (header->length > 2)
{
header = (struct apic_Interrupt_Controller_Structure_header_t *)ent;
if (header->type == type)
{
*(ret_vaddr[cnt++]) = (ul)ent;
flag = true;
}
ent += header->length;
}
*total = cnt;
if (!flag)
return APIC_E_NOTFOUND;
else
return APIC_SUCCESS;
}