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
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
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#ifndef _I386_TYPES_H
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#define _I386_TYPES_H
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#include <minix/sys_config.h>
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#include <machine/stackframe.h>
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#include <machine/fpu.h>
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struct segdesc_s { /* segment descriptor for protected mode */
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u16_t limit_low;
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u16_t base_low;
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u8_t base_middle;
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u8_t access; /* |P|DL|1|X|E|R|A| */
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u8_t granularity; /* |G|X|0|A|LIMT| */
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u8_t base_high;
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};
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#define LDT_SIZE (2 + NR_REMOTE_SEGS) /* CS, DS and remote segments */
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/* Fixed local descriptors. */
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#define CS_LDT_INDEX 0 /* process CS */
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#define DS_LDT_INDEX 1 /* process DS=ES=FS=GS=SS */
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#define EXTRA_LDT_INDEX 2 /* first of the extra LDT entries */
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typedef struct segframe {
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reg_t p_ldt_sel; /* selector in gdt with ldt base and limit */
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reg_t p_cr3; /* page table root */
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u32_t *p_cr3_v;
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struct segdesc_s p_ldt[LDT_SIZE]; /* CS, DS and remote */
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} segframe_t;
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/* fpu_state_s is used in kernel proc table.
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* Any changes in this structure requires changes in sconst.h,
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* since this structure is used in proc structure. */
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struct fpu_state_s {
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union fpu_state_u *fpu_save_area_p; /* 16-aligned fpu_save_area */
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/* fpu_image includes 512 bytes of image itself and
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* additional 15 bytes required for manual 16-byte alignment. */
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char fpu_image[527];
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};
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#define INMEMORY(p) (!p->p_seg.p_cr3 || get_cpulocal_var(ptproc) == p)
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typedef u32_t atomic_t; /* access to an aligned 32bit value is atomic on i386 */
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#endif /* #ifndef _I386_TYPES_H */
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