68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/* The kernel call implemented in this file:
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* m_type: SYS_VMCTL
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*
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* The parameters for this kernel call are:
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* SVMCTL_WHO which process
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* SVMCTL_PARAM set this setting (VMCTL_*)
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* SVMCTL_VALUE to this value
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*/
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#include "kernel/system.h"
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#include <assert.h>
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#include <minix/type.h>
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#include "arch_proto.h"
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extern phys_bytes video_mem_vaddr;
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extern char *video_mem;
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static void setcr3(struct proc *p, u32_t cr3, u32_t *v)
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{
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/* Set process CR3. */
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p->p_seg.p_cr3 = cr3;
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assert(p->p_seg.p_cr3);
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p->p_seg.p_cr3_v = v;
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if(p == get_cpulocal_var(ptproc)) {
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write_cr3(p->p_seg.p_cr3);
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}
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if(p->p_nr == VM_PROC_NR) {
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if (arch_enable_paging(p) != OK)
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panic("arch_enable_paging failed");
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}
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RTS_UNSET(p, RTS_VMINHIBIT);
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}
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/*===========================================================================*
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* arch_do_vmctl *
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*===========================================================================*/
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int arch_do_vmctl(m_ptr, p)
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register message *m_ptr; /* pointer to request message */
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struct proc *p;
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{
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switch(m_ptr->SVMCTL_PARAM) {
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case VMCTL_GET_PDBR:
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/* Get process page directory base reg (CR3). */
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m_ptr->SVMCTL_VALUE = p->p_seg.p_cr3;
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return OK;
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case VMCTL_SETADDRSPACE:
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setcr3(p, m_ptr->SVMCTL_PTROOT, (u32_t *) m_ptr->SVMCTL_PTROOT_V);
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return OK;
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case VMCTL_FLUSHTLB:
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{
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reload_cr3();
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return OK;
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}
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case VMCTL_I386_INVLPG:
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{
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i386_invlpg(m_ptr->SVMCTL_VALUE);
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return OK;
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}
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}
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printf("arch_do_vmctl: strange param %d\n", m_ptr->SVMCTL_PARAM);
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return EINVAL;
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}
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