0,0 → 1,190 |
# |
# Copyright (c) 2005 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, |
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
# |
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#include <arch/register.h> |
#include <arch/mm/page.h> |
#include <arch/mm/asid.h> |
#include <mm/asid.h> |
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#define RR_MASK (0xFFFFFFFF00000002) |
#define RID_SHIFT 8 |
#define PS_SHIFT 2 |
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#define KERNEL_TRANSLATION_I 0x0010000000000661 |
#define KERNEL_TRANSLATION_D 0x0010000000000661 |
#define KERNEL_TRANSLATION_VIO 0x0010000000000671 |
#define KERNEL_TRANSLATION_IO 0x00100FFFFC000671 |
#define VIO_OFFSET 0x0002000000000000 |
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#define IO_OFFSET 0x0001000000000000 |
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.section K_TEXT_START, "ax" |
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.global kernel_image_start |
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stack0: |
kernel_image_start: |
.auto |
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mov psr.l = r0 |
srlz.i |
srlz.d |
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# Fill TR.i and TR.d using Region Register #VRN_KERNEL |
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movl r8 = (VRN_KERNEL << VRN_SHIFT) |
mov r9 = rr[r8] |
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movl r10 = (RR_MASK) |
and r9 = r10, r9 |
movl r10 = ((RID_KERNEL << RID_SHIFT) | (KERNEL_PAGE_WIDTH << PS_SHIFT)) |
or r9 = r10, r9 |
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mov rr[r8] = r9 |
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movl r8 = (VRN_KERNEL << VRN_SHIFT) |
mov cr.ifa = r8 |
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mov r11 = cr.itir ;; |
movl r10 = (KERNEL_PAGE_WIDTH << PS_SHIFT);; |
or r10 =r10 , r11 ;; |
mov cr.itir = r10;; |
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movl r10 = (KERNEL_TRANSLATION_I) |
itr.i itr[r0] = r10 |
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movl r10 = (KERNEL_TRANSLATION_D) |
itr.d dtr[r0] = r10 |
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movl r7 = 1 |
movl r8 = (VRN_KERNEL << VRN_SHIFT) | VIO_OFFSET |
mov cr.ifa = r8 |
movl r10 = (KERNEL_TRANSLATION_VIO) |
itr.d dtr[r7] = r10 |
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mov r11 = cr.itir ;; |
movl r10 = ~0xfc;; |
and r10 =r10 , r11 ;; |
movl r11 = (IO_PAGE_WIDTH << PS_SHIFT);; |
or r10 =r10 , r11 ;; |
mov cr.itir = r10;; |
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movl r7 = 2 |
movl r8 = (VRN_KERNEL << VRN_SHIFT) | IO_OFFSET |
mov cr.ifa = r8 |
movl r10 = (KERNEL_TRANSLATION_IO) |
itr.d dtr[r7] = r10 |
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# initialize PSR |
movl r10 = (PSR_DT_MASK | PSR_RT_MASK | PSR_IT_MASK | PSR_IC_MASK) /* Enable paging */ |
mov r9 = psr |
or r10 = r10, r9 |
mov cr.ipsr = r10 |
mov cr.ifs = r0 |
movl r8 = paging_start |
mov cr.iip = r8 |
srlz.d |
srlz.i |
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.explicit |
/* |
* Return From Interupt is the only the way to fill upper half word of PSR. |
*/ |
rfi;; |
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.global paging_start |
paging_start: |
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/* |
* Now we are paging. |
*/ |
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# switch to register bank 1 |
bsw.1 |
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# initialize register stack |
mov ar.rsc = r0 |
movl r8 = (VRN_KERNEL << VRN_SHIFT) ;; |
mov ar.bspstore = r8 |
loadrs |
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# initialize memory stack to some sane value |
movl r12 = stack0 ;; |
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add r12 = -16, r12 /* allocate a scratch area on the stack */ |
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# initialize gp (Global Pointer) register |
movl r20 = (VRN_KERNEL << VRN_SHIFT);; |
or r20 = r20,r1;; |
movl r1 = _hardcoded_load_address |
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/* |
* Initialize hardcoded_* variables. |
*/ |
movl r14 = _hardcoded_ktext_size |
movl r15 = _hardcoded_kdata_size |
movl r16 = _hardcoded_load_address ;; |
addl r17 = @gprel(hardcoded_ktext_size), gp |
addl r18 = @gprel(hardcoded_kdata_size), gp |
addl r19 = @gprel(hardcoded_load_address), gp |
addl r21 = @gprel(bootinfo), gp |
;; |
st8 [r17] = r14 |
st8 [r18] = r15 |
st8 [r19] = r16 |
st8 [r21] = r20 |
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ssm (1 << 19) ;; /* Disable f32 - f127 */ |
srlz.i |
srlz.d ;; |
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br.call.sptk.many b0 = arch_pre_main |
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movl r18 = main_bsp ;; |
mov b1 = r18 ;; |
br.call.sptk.many b0 = b1 |
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0: |
br 0b |