62c666566e
- kernel detects CPUs by searching ACPI tables for local apic nodes - each CPU has its own TSS that points to its own stack. All cpus boot on the same boot stack (in sequence) but switch to its private stack as soon as they can. - final booting code in main() placed in bsp_finish_booting() which is executed only after the BSP switches to its final stack - apic functions to send startup interrupts - assembler functions to handle CPU features not needed for single cpu mode like memory barries, HT detection etc. - new files kernel/smp.[ch], kernel/arch/i386/arch_smp.c and kernel/arch/i386/include/arch_smp.h - 16-bit trampoline code for the APs. It is executed by each AP after receiving startup IPIs it brings up the CPUs to 32bit mode and let them spin in an infinite loop so they don't do any damage. - implementation of kernel spinlock - CONFIG_SMP and CONFIG_MAX_CPUS set by the build system
97 lines
2 KiB
C
97 lines
2 KiB
C
#ifndef __ACPI_H__
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#define __ACPI_H__
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#include "kernel/kernel.h"
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/* ACPI root system description pointer */
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struct acpi_rsdp {
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char signature[8]; /* must be "RSD PTR " */
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u8_t checksum;
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char oemid[6];
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u8_t revision;
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u32_t rsdt_addr;
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u32_t length;
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};
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#define ACPI_SDT_SIGNATURE_LEN 4
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#define ACPI_SDT_SIGNATURE(name) #name
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/* header common to all system description tables */
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struct acpi_sdt_header {
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char signature[ACPI_SDT_SIGNATURE_LEN];
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u32_t length;
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u8_t revision;
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u8_t checksum;
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char oemid[6];
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char oem_table_id[8];
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u32_t oem_revision;
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u32_t creator_id;
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u32_t creator_revision;
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};
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struct acpi_madt_hdr {
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struct acpi_sdt_header hdr;
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u32_t local_apic_address;
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u32_t flags;
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};
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#define ACPI_MADT_TYPE_LAPIC 0
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#define ACPI_MADT_TYPE_IOAPIC 1
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#define ACPI_MADT_TYPE_INT_SRC 2
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#define ACPI_MADT_TYPE_NMI_SRC 3
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#define ACPI_MADT_TYPE_LAPIC_NMI 4
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#define ACPI_MADT_TYPE_LAPIC_ADRESS 5
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#define ACPI_MADT_TYPE_IOSAPIC 6
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#define ACPI_MADT_TYPE_LSAPIC 7
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#define ACPI_MADT_TYPE_PLATFORM_INT_SRC 8
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#define ACPI_MADT_TYPE_Lx2APIC 9
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#define ACPI_MADT_TYPE_Lx2APIC_NMI 10
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struct acpi_madt_item_hdr{
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u8_t type;
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u8_t length;
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};
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struct acpi_madt_lapic {
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struct acpi_madt_item_hdr hdr;
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u8_t acpi_cpu_id;
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u8_t apic_id;
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u32_t flags;
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};
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struct acpi_madt_ioapic {
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struct acpi_madt_item_hdr hdr;
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u8_t id;
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u8_t __reserved;
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u32_t address;
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u32_t global_int_base;
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};
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struct acpi_madt_int_src {
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struct acpi_madt_item_hdr hdr;
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u8_t bus;
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u8_t bus_int;
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u32_t global_int;
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u16_t mps_flags;
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};
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struct acpi_madt_nmi {
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struct acpi_madt_item_hdr hdr;
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u16_t flags;
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u32_t global_int;
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};
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_PROTOTYPE(void acpi_init, (void));
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/*
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* Returns a pointer to the io acpi structure in the MADT table in ACPI. The
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* pointer is valid only until paging is turned off. No memory is allocated in
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* this function thus no memory needs to be freed
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*/
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_PROTOTYPE(struct acpi_madt_ioapic * acpi_get_ioapic_next, (void));
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/* same as above for local APICs */
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_PROTOTYPE(struct acpi_madt_lapic * acpi_get_lapic_next, (void));
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#endif /* __ACPI_H__ */
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