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• Program-execution

Init-sys-view

Switches the model to the system-level view and load our default configuration of 1G page tables.

Signature

(init-sys-view paging-base-addr x86) → x86

Returns

x86 — Type (x86p x86), given (and (x86p x86) (unsigned-byte-p 52 paging-base-addr)).

Definitions and Theorems

Function: init-sys-view

(defun init-sys-view (paging-base-addr x86)
 (declare (xargs :stobjs (x86)))
 (declare (type (unsigned-byte 52)
                paging-base-addr))
 (declare (xargs :guard (equal (loghead 12 paging-base-addr)
                               0)))
 (let ((__function__ 'init-sys-view))
   (declare (ignorable __function__))
   (b*
    ((ctx 'init-sys-view)
     ((when (not (mbt (equal (loghead 12 paging-base-addr)
                             0))))
      (!!ms-fresh :misaligned-paging-base-address paging-base-addr))
     (paging-base-addr40 (logtail 12 paging-base-addr))
     (x86 (!app-view nil x86))
     (cr0 (n32 (ctri 0 x86)))
     (cr4 (n21 (ctri 4 x86)))
     (x86 (!ctri 0 (!cr0bits->pg 1 cr0) x86))
     (x86 (!ctri 4 (!cr4bits->pae 1 cr4) x86))
     (x86 (!ctri 3
                 (!cr3bits->pdb paging-base-addr40 (ctri 3 x86))
                 x86))
     (efer (n12 (msri 0 x86)))
     (x86 (!msri 0 (!ia32_eferbits->lme 1 efer)
                 x86))
     (x86 (load-qwords-into-physical-memory-list
               (construct-page-tables paging-base-addr)
               x86)))
    x86)))

Theorem: x86p-of-init-sys-view

(defthm x86p-of-init-sys-view
  (implies (and (x86p x86)
                (unsigned-byte-p 52 paging-base-addr))
           (b* ((x86 (init-sys-view paging-base-addr x86)))
             (x86p x86)))
  :rule-classes :rewrite)