/* head-uc-fr555.S: FR555 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/init.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 __551_DARS0 0xfeff0100 #define __551_DARS1 0xfeff0104 #define __551_DARS2 0xfeff0108 #define __551_DARS3 0xfeff010c #define __551_DAMK0 0xfeff0110 #define __551_DAMK1 0xfeff0114 #define __551_DAMK2 0xfeff0118 #define __551_DAMK3 0xfeff011c #define __551_LCR 0xfeff1100 #define __551_LSBR 0xfeff1c00 __INIT .balign 4 ############################################################################### # # describe the position and layout of the SDRAM controller registers # # ENTRY: EXIT: # GR5 - cacheline size # GR11 - displacement of 2nd SDRAM addr reg from GR14 # GR12 - displacement of 3rd SDRAM addr reg from GR14 # GR13 - displacement of 4th SDRAM addr reg from GR14 # GR14 - address of 1st SDRAM addr reg # GR15 - amount to shift address by to match SDRAM addr reg # GR26 &__head_reference [saved] # GR30 LED address [saved] # CC0 - T if DARS0 is present # CC1 - T if DARS1 is present # CC2 - T if DARS2 is present # CC3 - T if DARS3 is present # ############################################################################### .globl __head_fr555_describe_sdram __head_fr555_describe_sdram: sethi.p %hi(__551_DARS0),gr14 setlo %lo(__551_DARS0),gr14 setlos.p #__551_DARS1-__551_DARS0,gr11 setlos #__551_DARS2-__551_DARS0,gr12 setlos.p #__551_DARS3-__551_DARS0,gr13 setlos #64,gr5 ; cacheline size setlos #20,gr15 ; amount to shift addr by setlos #0x00ff,gr4 movgs gr4,cccr ; extant DARS/DAMK regs bralr ############################################################################### # # rearrange the bus controller registers # # ENTRY: EXIT: # GR26 &__head_reference [saved] # GR30 LED address revised LED address # ############################################################################### .globl __head_fr555_set_busctl __head_fr555_set_busctl: LEDS 0x100f sethi.p %hi(__551_LSBR),gr10 setlo %lo(__551_LSBR),gr10 sethi.p %hi(__551_LCR),gr11 setlo %lo(__551_LCR),gr11 # set the bus controller sethi.p %hi(__region_CS1),gr4 setlo %lo(__region_CS1),gr4 sethi.p %hi(__region_CS1_M),gr5 setlo %lo(__region_CS1_M),gr5 sethi.p %hi(__region_CS1_C),gr6 setlo %lo(__region_CS1_C),gr6 sti gr4,@(gr10,#1*0x08) sti gr5,@(gr10,#1*0x08+0x100) sti gr6,@(gr11,#1*0x08) sethi.p %hi(__region_CS2),gr4 setlo %lo(__region_CS2),gr4 sethi.p %hi(__region_CS2_M),gr5 setlo %lo(__region_CS2_M),gr5 sethi.p %hi(__region_CS2_C),gr6 setlo %lo(__region_CS2_C),gr6 sti gr4,@(gr10,#2*0x08) sti gr5,@(gr10,#2*0x08+0x100) sti gr6,@(gr11,#2*0x08) sethi.p %hi(__region_CS3),gr4 setlo %lo(__region_CS3),gr4 sethi.p %hi(__region_CS3_M),gr5 setlo %lo(__region_CS3_M),gr5 sethi.p %hi(__region_CS3_C),gr6 setlo %lo(__region_CS3_C),gr6 sti gr4,@(gr10,#3*0x08) sti gr5,@(gr10,#3*0x08+0x100) sti gr6,@(gr11,#3*0x08) sethi.p %hi(__region_CS4),gr4 setlo %lo(__region_CS4),gr4 sethi.p %hi(__region_CS4_M),gr5 setlo %lo(__region_CS4_M),gr5 sethi.p %hi(__region_CS4_C),gr6 setlo %lo(__region_CS4_C),gr6 sti gr4,@(gr10,#4*0x08) sti gr5,@(gr10,#4*0x08+0x100) sti gr6,@(gr11,#4*0x08) sethi.p %hi(__region_CS5),gr4 setlo %lo(__region_CS5),gr4 sethi.p %hi(__region_CS5_M),gr5 setlo %lo(__region_CS5_M),gr5 sethi.p %hi(__region_CS5_C),gr6 setlo %lo(__region_CS5_C),gr6 sti gr4,@(gr10,#5*0x08) sti gr5,@(gr10,#5*0x08+0x100) sti gr6,@(gr11,#5*0x08) sethi.p %hi(__region_CS6),gr4 setlo %lo(__region_CS6),gr4 sethi.p %hi(__region_CS6_M),gr5 setlo %lo(__region_CS6_M),gr5 sethi.p %hi(__region_CS6_C),gr6 setlo %lo(__region_CS6_C),gr6 sti gr4,@(gr10,#6*0x08) sti gr5,@(gr10,#6*0x08+0x100) sti gr6,@(gr11,#6*0x08) sethi.p %hi(__region_CS7),gr4 setlo %lo(__region_CS7),gr4 sethi.p %hi(__region_CS7_M),gr5 setlo %lo(__region_CS7_M),gr5 sethi.p %hi(__region_CS7_C),gr6 setlo %lo(__region_CS7_C),gr6 sti gr4,@(gr10,#7*0x08) sti gr5,@(gr10,#7*0x08+0x100) sti gr6,@(gr11,#7*0x08) membar bar # adjust LED bank address #ifdef CONFIG_MB93091_VDK sethi.p %hi(LED_ADDR - 0x20000000 +__region_CS2),gr30 setlo %lo(LED_ADDR - 0x20000000 +__region_CS2),gr30 #endif bralr ############################################################################### # # determine the total SDRAM size # # ENTRY: EXIT: # GR25 - SDRAM size # GR26 &__head_reference [saved] # GR30 LED address [saved] # ############################################################################### .globl __head_fr555_survey_sdram __head_fr555_survey_sdram: sethi.p %hi(__551_DAMK0),gr11 setlo %lo(__551_DAMK0),gr11 sethi.p %hi(__551_DARS0),gr12 setlo %lo(__551_DARS0),gr12 sethi.p %hi(0xfff),gr17 ; unused SDRAM AMK value setlo %lo(0xfff),gr17 setlos #0,gr25 ldi @(gr11,#0x00),gr6 ; DAMK0: bits 11:0 match addr 11:0 subcc gr6,gr17,gr0,icc0 beq icc0,#0,__head_no_DCS0 ldi @(gr12,#0x00),gr4 ; DARS0 add gr25,gr6,gr25 addi gr25,#1,gr25 __head_no_DCS0: ldi @(gr11,#0x04),gr6 ; DAMK1: bits 11:0 match addr 11:0 subcc gr6,gr17,gr0,icc0 beq icc0,#0,__head_no_DCS1 ldi @(gr12,#0x04),gr4 ; DARS1 add gr25,gr6,gr25 addi gr25,#1,gr25 __head_no_DCS1: ldi @(gr11,#0x8),gr6 ; DAMK2: bits 11:0 match addr 11:0 subcc gr6,gr17,gr0,icc0 beq icc0,#0,__head_no_DCS2 ldi @(gr12,#0x8),gr4 ; DARS2 add gr25,gr6,gr25 addi gr25,#1,gr25 __head_no_DCS2: ldi @(gr11,#0xc),gr6 ; DAMK3: bits 11:0 match addr 11:0 subcc gr6,gr17,gr0,icc0 beq icc0,#0,__head_no_DCS3 ldi @(gr12,#0xc),gr4 ; DARS3 add gr25,gr6,gr25 addi gr25,#1,gr25 __head_no_DCS3: slli gr25,#20,gr25 ; shift [11:0] -> [31:20] bralr ############################################################################### # # set the protection map with the I/DAMPR registers # # ENTRY: EXIT: # GR25 SDRAM size saved # GR30 LED address saved # ############################################################################### .globl __head_fr555_set_protection __head_fr555_set_protection: movsg lr,gr27 sethi.p %hi(0xfff00000),gr11 setlo %lo(0xfff00000),gr11 # set the I/O region protection registers for FR555 sethi.p %hi(__region_IO),gr7 setlo %lo(__region_IO),gr7 ori gr7,#xAMPRx_SS_512Mb|xAMPRx_S_KERNEL|xAMPRx_C|xAMPRx_V,gr5 movgs gr0,iampr15 movgs gr0,iamlr15 movgs gr5,dampr15 movgs gr7,damlr15 # 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 # GR8 = base of uncovered RAM # GR9 = top of uncovered RAM # GR11 - mask for DAMLR/IAMLR regs # call __head_split_region movgs gr4,iampr14 movgs gr6,iamlr14 movgs gr5,dampr14 movgs gr7,damlr14 call __head_split_region movgs gr4,iampr13 movgs gr6,iamlr13 movgs gr5,dampr13 movgs gr7,damlr13 call __head_split_region movgs gr4,iampr12 movgs gr6,iamlr12 movgs gr5,dampr12 movgs gr7,damlr12 call __head_split_region movgs gr4,iampr11 movgs gr6,iamlr11 movgs gr5,dampr11 movgs gr7,damlr11 call __head_split_region movgs gr4,iampr10 movgs gr6,iamlr10 movgs gr5,dampr10 movgs gr7,damlr10 call __head_split_region movgs gr4,iampr9 movgs gr6,iamlr9 movgs gr5,dampr9 movgs gr7,damlr9 call __head_split_region movgs gr4,iampr8 movgs gr6,iamlr8 movgs gr5,dampr8 movgs gr7,damlr8 call __head_split_region movgs gr4,iampr7 movgs gr6,iamlr7 movgs gr5,dampr7 movgs gr7,damlr7 call __head_split_region movgs gr4,iampr6 movgs gr6,iamlr6 movgs gr5,dampr6 movgs gr7,damlr6 call __head_split_region movgs gr4,iampr5 movgs gr6,iamlr5 movgs gr5,dampr5 movgs gr7,damlr5 call __head_split_region movgs gr4,iampr4 movgs gr6,iamlr4 movgs gr5,dampr4 movgs gr7,damlr4 call __head_split_region movgs gr4,iampr3 movgs gr6,iamlr3 movgs gr5,dampr3 movgs gr7,damlr3 call __head_split_region movgs gr4,iampr2 movgs gr6,iamlr2 movgs gr5,dampr2 movgs gr7,damlr2 call __head_split_region movgs gr4,iampr1 movgs gr6,iamlr1 movgs gr5,dampr1 movgs gr7,damlr1 # cover kernel core image with kernel-only segment 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 jmpl @(gr27,gr0)