38e17b68e3
The x86 paging code has been rewritten to support another paging mode and non-identity virtual mappings. - Paging code now uses an array of paging level characteristics and walks tables using for loops. This is opposed to having different functions for every paging level and lots of #ifdefs. The code is now more concise and adding new paging modes should be trivial. - We now support 32-bit, PAE, and IA-32e page tables. - The page tables created by gen_mmu.py are now installed at early boot. There are no longer separate "flat" page tables. These tables are mutable at any time. - The x86_mmu code now has a private header. Many definitions that did not need to be in public scope have been moved out of mmustructs.h and either placed in the C file or in the private header. - Improvements to dumping page table information, with the physical mapping and flags all shown - arch_mem_map() implemented - x86 userspace/memory domain code ported to use the new infrastructure. - add logic for physical -> virtual instruction pointer transition, including cleaning up identity mappings after this takes place. Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
/*
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* Copyright (c) 2019 Intel Corporation
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <kernel.h>
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#include <ksched.h>
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#include <kernel_structs.h>
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#include <kernel_internal.h>
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#include <offsets_short.h>
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#include <x86_mmu.h>
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extern void x86_sse_init(struct k_thread *); /* in locore.S */
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struct x86_initial_frame {
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/* zeroed return address for ABI */
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uint64_t rip;
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};
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void arch_new_thread(struct k_thread *thread, k_thread_stack_t *stack,
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char *stack_ptr, k_thread_entry_t entry,
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void *p1, void *p2, void *p3)
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{
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void *switch_entry;
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struct x86_initial_frame *iframe;
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#if CONFIG_X86_STACK_PROTECTION
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z_x86_set_stack_guard(stack);
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#endif
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#ifdef CONFIG_USERSPACE
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switch_entry = z_x86_userspace_prepare_thread(thread);
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thread->arch.cs = X86_KERNEL_CS;
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thread->arch.ss = X86_KERNEL_DS;
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#else
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switch_entry = z_thread_entry;
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#endif
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iframe = Z_STACK_PTR_TO_FRAME(struct x86_initial_frame, stack_ptr);
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iframe->rip = 0;
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thread->callee_saved.rsp = (long) iframe;
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thread->callee_saved.rip = (long) switch_entry;
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thread->callee_saved.rflags = EFLAGS_INITIAL;
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/* Parameters to entry point, which is populated in
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* thread->callee_saved.rip
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*/
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thread->arch.rdi = (long) entry;
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thread->arch.rsi = (long) p1;
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thread->arch.rdx = (long) p2;
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thread->arch.rcx = (long) p3;
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x86_sse_init(thread);
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thread->arch.flags = X86_THREAD_FLAG_ALL;
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thread->switch_handle = thread;
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}
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