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#
# Copyright (c) 2006 Jakub Jermar
# All rights reserved.
#
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# modification, are permitted provided that the following conditions
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/**
 * @file
 * @brief   MMU trap handlers that do not fit into the trap table.
 */

.register %g2, #scratch
.register %g3, #scratch

.text

#include <arch/trap/sun4v/mmu.h>
#include <arch/trap/trap_table.h>
#include <arch/sun4v/regdef.h>

/*
 * Install mapping for the kernel. The mapping obeys this formula:
 *  virtual address = real address + start of physical memory
 *
 * The routine expects the following values of registers:
 *   %g1    virtual address that has caused the miss
 */
.global install_identity_mapping
install_identity_mapping:

    /* output registers mustn't be clobbered during the hypercall, SAVE is too risky */
    mov %o0, %g3
    mov %o1, %g4
    mov %o2, %g5
    mov %o3, %g6

    /* install mapping for kernel */
    mov %g1, %o0
    set 0, %o1                  ! set context
    setx kernel_8k_tlb_data_template, %g1, %g2  ! g2 <= template of TTE Data
    ldx [%g2], %g2                  ! read the TTE Data template
    add %g2, %o0, %o2               ! template + VA = TTE Data entry
    set MMU_FLAG_DTLB, %o3              ! map in DTLB only
    ta MMU_MAP_ADDR

    /* restore output registers */
    mov %g6, %o3
    mov %g5, %o2
    mov %g4, %o1
    mov %g3, %o0

    retry