0,0 → 1,74 |
# |
# Copyright (c) 2006 Jakub Jermar |
# All rights reserved. |
# |
# Redistribution and use in source and binary forms, with or without |
# modification, are permitted provided that the following conditions |
# are met: |
# |
# - Redistributions of source code must retain the above copyright |
# notice, this list of conditions and the following disclaimer. |
# - Redistributions in binary form must reproduce the above copyright |
# notice, this list of conditions and the following disclaimer in the |
# documentation and/or other materials provided with the distribution. |
# - The name of the author may not be used to endorse or promote products |
# derived from this software without specific prior written permission. |
# |
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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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 |