| /* 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/config.h> |
| #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) |
