2026-02-08 11:34:21 +00:00
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#ifndef ARCH_TSS_H_
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#define ARCH_TSS_H_
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2026-02-19 18:54:48 +00:00
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#include <kernel/compiler.h>
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#include <kernel/types.h>
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2026-02-08 11:34:21 +00:00
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#include <stdint.h>
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#define TSS_GDT_INDEX 5
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struct tss {
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uint32_t res0;
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uint64_t rsp0;
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uint64_t rsp1;
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uint64_t rsp2;
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uint64_t res1;
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uint64_t ist1;
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uint64_t ist2;
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uint64_t ist3;
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uint64_t ist4;
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uint64_t ist5;
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uint64_t ist6;
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uint64_t ist7;
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uint64_t res2;
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uint16_t res3;
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uint16_t iomap_offset;
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} __packed;
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struct tss_gdt_entry {
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/* these fields are copied from struct gdt_entry */
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uint16_t ge_limit_low;
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uint16_t ge_base_low;
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uint8_t ge_base_mid;
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uint8_t ge_access;
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uint8_t ge_gran;
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uint8_t ge_base_hi;
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/* these fields are specific to the TSS entry */
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uint32_t ge_base_ext;
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uint32_t ge_reserved;
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} __packed;
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struct tss_ptr {
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uint16_t tss_limit;
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uint64_t tss_base;
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} __packed;
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extern void tss_init(struct tss *tss, struct tss_ptr *ptr);
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extern void tss_load(struct tss *tss);
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extern virt_addr_t tss_get_kstack(struct tss *tss);
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extern virt_addr_t tss_get_ustack(struct tss *tss);
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extern void tss_set_kstack(struct tss *tss, virt_addr_t sp);
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extern void tss_set_ustack(struct tss *tss, virt_addr_t sp);
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#endif
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