57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
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/* 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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static void set_ttbr(struct proc *p, u32_t ttbr, u32_t *v)
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{
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/* Set process TTBR. */
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p->p_seg.p_ttbr = ttbr;
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assert(p->p_seg.p_ttbr);
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p->p_seg.p_ttbr_v = v;
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if(p == get_cpulocal_var(ptproc)) {
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write_ttbr0(p->p_seg.p_ttbr);
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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 (TTBR). */
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m_ptr->SVMCTL_VALUE = p->p_seg.p_ttbr;
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return OK;
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case VMCTL_SETADDRSPACE:
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set_ttbr(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_ttbr0();
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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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