174 lines
4.0 KiB
ArmAsm
174 lines
4.0 KiB
ArmAsm
/* head-uc-fr451.S: FR451 uc-linux specific bits of initialisation
|
|
*
|
|
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/threads.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/page.h>
|
|
#include <asm/spr-regs.h>
|
|
#include <asm/mb86943a.h>
|
|
#include "head.inc"
|
|
|
|
|
|
#define __400_DBR0 0xfe000e00
|
|
#define __400_DBR1 0xfe000e08
|
|
#define __400_DBR2 0xfe000e10
|
|
#define __400_DBR3 0xfe000e18
|
|
#define __400_DAM0 0xfe000f00
|
|
#define __400_DAM1 0xfe000f08
|
|
#define __400_DAM2 0xfe000f10
|
|
#define __400_DAM3 0xfe000f18
|
|
#define __400_LGCR 0xfe000010
|
|
#define __400_LCR 0xfe000100
|
|
#define __400_LSBR 0xfe000c00
|
|
|
|
.section .text.init,"ax"
|
|
.balign 4
|
|
|
|
###############################################################################
|
|
#
|
|
# set the protection map with the I/DAMPR registers
|
|
#
|
|
# ENTRY: EXIT:
|
|
# GR25 SDRAM size [saved]
|
|
# GR26 &__head_reference [saved]
|
|
# GR30 LED address [saved]
|
|
#
|
|
###############################################################################
|
|
.globl __head_fr451_set_protection
|
|
__head_fr451_set_protection:
|
|
movsg lr,gr27
|
|
|
|
movgs gr0,dampr10
|
|
movgs gr0,damlr10
|
|
movgs gr0,dampr9
|
|
movgs gr0,damlr9
|
|
movgs gr0,dampr8
|
|
movgs gr0,damlr8
|
|
|
|
# set the I/O region protection registers for FR401/3/5
|
|
sethi.p %hi(__region_IO),gr5
|
|
setlo %lo(__region_IO),gr5
|
|
sethi.p %hi(0x1fffffff),gr7
|
|
setlo %lo(0x1fffffff),gr7
|
|
ori gr5,#xAMPRx_SS_512Mb|xAMPRx_S_KERNEL|xAMPRx_C|xAMPRx_V,gr5
|
|
movgs gr5,dampr11 ; General I/O tile
|
|
movgs gr7,damlr11
|
|
|
|
# need to tile the remaining IAMPR/DAMPR registers to cover as much of the RAM as possible
|
|
# - start with the highest numbered registers
|
|
sethi.p %hi(__kernel_image_end),gr8
|
|
setlo %lo(__kernel_image_end),gr8
|
|
sethi.p %hi(32768),gr4 ; allow for a maximal allocator bitmap
|
|
setlo %lo(32768),gr4
|
|
add gr8,gr4,gr8
|
|
sethi.p %hi(1024*2048-1),gr4 ; round up to nearest 2MiB
|
|
setlo %lo(1024*2048-1),gr4
|
|
add.p gr8,gr4,gr8
|
|
not gr4,gr4
|
|
and gr8,gr4,gr8
|
|
|
|
sethi.p %hi(__page_offset),gr9
|
|
setlo %lo(__page_offset),gr9
|
|
add gr9,gr25,gr9
|
|
|
|
sethi.p %hi(0xffffc000),gr11
|
|
setlo %lo(0xffffc000),gr11
|
|
|
|
# GR8 = base of uncovered RAM
|
|
# GR9 = top of uncovered RAM
|
|
# GR11 = xAMLR mask
|
|
LEDS 0x3317
|
|
call __head_split_region
|
|
movgs gr4,iampr7
|
|
movgs gr6,iamlr7
|
|
movgs gr5,dampr7
|
|
movgs gr7,damlr7
|
|
|
|
LEDS 0x3316
|
|
call __head_split_region
|
|
movgs gr4,iampr6
|
|
movgs gr6,iamlr6
|
|
movgs gr5,dampr6
|
|
movgs gr7,damlr6
|
|
|
|
LEDS 0x3315
|
|
call __head_split_region
|
|
movgs gr4,iampr5
|
|
movgs gr6,iamlr5
|
|
movgs gr5,dampr5
|
|
movgs gr7,damlr5
|
|
|
|
LEDS 0x3314
|
|
call __head_split_region
|
|
movgs gr4,iampr4
|
|
movgs gr6,iamlr4
|
|
movgs gr5,dampr4
|
|
movgs gr7,damlr4
|
|
|
|
LEDS 0x3313
|
|
call __head_split_region
|
|
movgs gr4,iampr3
|
|
movgs gr6,iamlr3
|
|
movgs gr5,dampr3
|
|
movgs gr7,damlr3
|
|
|
|
LEDS 0x3312
|
|
call __head_split_region
|
|
movgs gr4,iampr2
|
|
movgs gr6,iamlr2
|
|
movgs gr5,dampr2
|
|
movgs gr7,damlr2
|
|
|
|
LEDS 0x3311
|
|
call __head_split_region
|
|
movgs gr4,iampr1
|
|
movgs gr6,iamlr1
|
|
movgs gr5,dampr1
|
|
movgs gr7,damlr1
|
|
|
|
# cover kernel core image with kernel-only segment
|
|
LEDS 0x3310
|
|
sethi.p %hi(__page_offset),gr8
|
|
setlo %lo(__page_offset),gr8
|
|
call __head_split_region
|
|
|
|
#ifdef CONFIG_PROTECT_KERNEL
|
|
ori.p gr4,#xAMPRx_S_KERNEL,gr4
|
|
ori gr5,#xAMPRx_S_KERNEL,gr5
|
|
#endif
|
|
|
|
movgs gr4,iampr0
|
|
movgs gr6,iamlr0
|
|
movgs gr5,dampr0
|
|
movgs gr7,damlr0
|
|
|
|
# start in TLB context 0 with no page tables
|
|
movgs gr0,cxnr
|
|
movgs gr0,ttbr
|
|
|
|
# the FR451 also has an extra trap base register
|
|
movsg tbr,gr4
|
|
movgs gr4,btbr
|
|
|
|
# turn on the timers as appropriate
|
|
movgs gr0,timerh
|
|
movgs gr0,timerl
|
|
movgs gr0,timerd
|
|
movsg hsr0,gr4
|
|
sethi.p %hi(HSR0_ETMI),gr5
|
|
setlo %lo(HSR0_ETMI),gr5
|
|
or gr4,gr5,gr4
|
|
movgs gr4,hsr0
|
|
|
|
LEDS 0x3300
|
|
jmpl @(gr27,gr0)
|