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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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df1f6d200c
FRV is placing some code in the .text.init section but does not reference that section in its linker scripts. This change moves this code from the .text.init section to the .init.text section, which is presumably where it belongs. Signed-off-by: Tim Abbott <tabbott@mit.edu> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
312 lines
8.6 KiB
ArmAsm
312 lines
8.6 KiB
ArmAsm
/* head-uc-fr401.S: FR401/3/5 uc-linux specific bits of initialisation
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*
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* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/threads.h>
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#include <linux/linkage.h>
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#include <asm/ptrace.h>
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#include <asm/page.h>
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#include <asm/spr-regs.h>
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#include <asm/mb86943a.h>
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#include "head.inc"
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#define __400_DBR0 0xfe000e00
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#define __400_DBR1 0xfe000e08
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#define __400_DBR2 0xfe000e10 /* not on FR401 */
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#define __400_DBR3 0xfe000e18 /* not on FR401 */
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#define __400_DAM0 0xfe000f00
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#define __400_DAM1 0xfe000f08
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#define __400_DAM2 0xfe000f10 /* not on FR401 */
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#define __400_DAM3 0xfe000f18 /* not on FR401 */
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#define __400_LGCR 0xfe000010
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#define __400_LCR 0xfe000100
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#define __400_LSBR 0xfe000c00
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__INIT
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.balign 4
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###############################################################################
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#
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# describe the position and layout of the SDRAM controller registers
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#
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# ENTRY: EXIT:
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# GR5 - cacheline size
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# GR11 - displacement of 2nd SDRAM addr reg from GR14
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# GR12 - displacement of 3rd SDRAM addr reg from GR14
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# GR13 - displacement of 4th SDRAM addr reg from GR14
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# GR14 - address of 1st SDRAM addr reg
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# GR15 - amount to shift address by to match SDRAM addr reg
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# GR26 &__head_reference [saved]
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# GR30 LED address [saved]
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# CC0 - T if DBR0 is present
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# CC1 - T if DBR1 is present
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# CC2 - T if DBR2 is present (not FR401/FR401A)
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# CC3 - T if DBR3 is present (not FR401/FR401A)
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#
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###############################################################################
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.globl __head_fr401_describe_sdram
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__head_fr401_describe_sdram:
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sethi.p %hi(__400_DBR0),gr14
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setlo %lo(__400_DBR0),gr14
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setlos.p #__400_DBR1-__400_DBR0,gr11
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setlos #__400_DBR2-__400_DBR0,gr12
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setlos.p #__400_DBR3-__400_DBR0,gr13
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setlos #32,gr5 ; cacheline size
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setlos.p #0,gr15 ; amount to shift addr reg by
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# specify which DBR regs are present
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setlos #0x00ff,gr4
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movgs gr4,cccr
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movsg psr,gr3 ; check for FR401/FR401A
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srli gr3,#25,gr3
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subicc gr3,#0x20>>1,gr0,icc0
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bnelr icc0,#1
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setlos #0x000f,gr4
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movgs gr4,cccr
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bralr
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###############################################################################
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#
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# rearrange the bus controller registers
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#
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# ENTRY: EXIT:
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# GR26 &__head_reference [saved]
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# GR30 LED address revised LED address
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#
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###############################################################################
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.globl __head_fr401_set_busctl
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__head_fr401_set_busctl:
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sethi.p %hi(__400_LGCR),gr4
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setlo %lo(__400_LGCR),gr4
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sethi.p %hi(__400_LSBR),gr10
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setlo %lo(__400_LSBR),gr10
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sethi.p %hi(__400_LCR),gr11
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setlo %lo(__400_LCR),gr11
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# set the bus controller
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ldi @(gr4,#0),gr5
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ori gr5,#0xff,gr5 ; make sure all chip-selects are enabled
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sti gr5,@(gr4,#0)
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sethi.p %hi(__region_CS1),gr4
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setlo %lo(__region_CS1),gr4
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sethi.p %hi(__region_CS1_M),gr5
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setlo %lo(__region_CS1_M),gr5
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sethi.p %hi(__region_CS1_C),gr6
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setlo %lo(__region_CS1_C),gr6
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sti gr4,@(gr10,#1*0x08)
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sti gr5,@(gr10,#1*0x08+0x100)
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sti gr6,@(gr11,#1*0x08)
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sethi.p %hi(__region_CS2),gr4
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setlo %lo(__region_CS2),gr4
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sethi.p %hi(__region_CS2_M),gr5
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setlo %lo(__region_CS2_M),gr5
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sethi.p %hi(__region_CS2_C),gr6
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setlo %lo(__region_CS2_C),gr6
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sti gr4,@(gr10,#2*0x08)
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sti gr5,@(gr10,#2*0x08+0x100)
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sti gr6,@(gr11,#2*0x08)
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sethi.p %hi(__region_CS3),gr4
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setlo %lo(__region_CS3),gr4
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sethi.p %hi(__region_CS3_M),gr5
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setlo %lo(__region_CS3_M),gr5
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sethi.p %hi(__region_CS3_C),gr6
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setlo %lo(__region_CS3_C),gr6
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sti gr4,@(gr10,#3*0x08)
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sti gr5,@(gr10,#3*0x08+0x100)
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sti gr6,@(gr11,#3*0x08)
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sethi.p %hi(__region_CS4),gr4
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setlo %lo(__region_CS4),gr4
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sethi.p %hi(__region_CS4_M),gr5
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setlo %lo(__region_CS4_M),gr5
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sethi.p %hi(__region_CS4_C),gr6
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setlo %lo(__region_CS4_C),gr6
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sti gr4,@(gr10,#4*0x08)
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sti gr5,@(gr10,#4*0x08+0x100)
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sti gr6,@(gr11,#4*0x08)
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sethi.p %hi(__region_CS5),gr4
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setlo %lo(__region_CS5),gr4
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sethi.p %hi(__region_CS5_M),gr5
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setlo %lo(__region_CS5_M),gr5
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sethi.p %hi(__region_CS5_C),gr6
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setlo %lo(__region_CS5_C),gr6
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sti gr4,@(gr10,#5*0x08)
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sti gr5,@(gr10,#5*0x08+0x100)
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sti gr6,@(gr11,#5*0x08)
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sethi.p %hi(__region_CS6),gr4
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setlo %lo(__region_CS6),gr4
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sethi.p %hi(__region_CS6_M),gr5
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setlo %lo(__region_CS6_M),gr5
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sethi.p %hi(__region_CS6_C),gr6
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setlo %lo(__region_CS6_C),gr6
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sti gr4,@(gr10,#6*0x08)
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sti gr5,@(gr10,#6*0x08+0x100)
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sti gr6,@(gr11,#6*0x08)
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sethi.p %hi(__region_CS7),gr4
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setlo %lo(__region_CS7),gr4
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sethi.p %hi(__region_CS7_M),gr5
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setlo %lo(__region_CS7_M),gr5
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sethi.p %hi(__region_CS7_C),gr6
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setlo %lo(__region_CS7_C),gr6
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sti gr4,@(gr10,#7*0x08)
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sti gr5,@(gr10,#7*0x08+0x100)
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sti gr6,@(gr11,#7*0x08)
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membar
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bar
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# adjust LED bank address
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sethi.p %hi(LED_ADDR - 0x20000000 +__region_CS2),gr30
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setlo %lo(LED_ADDR - 0x20000000 +__region_CS2),gr30
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bralr
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###############################################################################
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#
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# determine the total SDRAM size
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#
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# ENTRY: EXIT:
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# GR25 - SDRAM size
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# GR26 &__head_reference [saved]
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# GR30 LED address [saved]
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#
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###############################################################################
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.globl __head_fr401_survey_sdram
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__head_fr401_survey_sdram:
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sethi.p %hi(__400_DAM0),gr11
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setlo %lo(__400_DAM0),gr11
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sethi.p %hi(__400_DBR0),gr12
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setlo %lo(__400_DBR0),gr12
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sethi.p %hi(0xfe000000),gr17 ; unused SDRAM DBR value
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setlo %lo(0xfe000000),gr17
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setlos #0,gr25
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ldi @(gr12,#0x00),gr4 ; DAR0
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subcc gr4,gr17,gr0,icc0
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beq icc0,#0,__head_no_DCS0
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ldi @(gr11,#0x00),gr6 ; DAM0: bits 31:20 match addr 31:20
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add gr25,gr6,gr25
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addi gr25,#1,gr25
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__head_no_DCS0:
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ldi @(gr12,#0x08),gr4 ; DAR1
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subcc gr4,gr17,gr0,icc0
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beq icc0,#0,__head_no_DCS1
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ldi @(gr11,#0x08),gr6 ; DAM1: bits 31:20 match addr 31:20
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add gr25,gr6,gr25
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addi gr25,#1,gr25
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__head_no_DCS1:
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# FR401/FR401A does not have DCS2/3
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movsg psr,gr3
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srli gr3,#25,gr3
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subicc gr3,#0x20>>1,gr0,icc0
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beq icc0,#0,__head_no_DCS3
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ldi @(gr12,#0x10),gr4 ; DAR2
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subcc gr4,gr17,gr0,icc0
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beq icc0,#0,__head_no_DCS2
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ldi @(gr11,#0x10),gr6 ; DAM2: bits 31:20 match addr 31:20
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add gr25,gr6,gr25
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addi gr25,#1,gr25
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__head_no_DCS2:
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ldi @(gr12,#0x18),gr4 ; DAR3
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subcc gr4,gr17,gr0,icc0
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beq icc0,#0,__head_no_DCS3
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ldi @(gr11,#0x18),gr6 ; DAM3: bits 31:20 match addr 31:20
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add gr25,gr6,gr25
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addi gr25,#1,gr25
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__head_no_DCS3:
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bralr
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###############################################################################
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#
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# set the protection map with the I/DAMPR registers
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#
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# ENTRY: EXIT:
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# GR25 SDRAM size [saved]
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# GR26 &__head_reference [saved]
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# GR30 LED address [saved]
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#
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###############################################################################
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.globl __head_fr401_set_protection
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__head_fr401_set_protection:
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movsg lr,gr27
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# set the I/O region protection registers for FR401/3/5
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sethi.p %hi(__region_IO),gr5
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setlo %lo(__region_IO),gr5
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ori gr5,#xAMPRx_SS_512Mb|xAMPRx_S_KERNEL|xAMPRx_C|xAMPRx_V,gr5
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movgs gr0,iampr7
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movgs gr5,dampr7 ; General I/O tile
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# need to tile the remaining IAMPR/DAMPR registers to cover as much of the RAM as possible
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# - start with the highest numbered registers
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sethi.p %hi(__kernel_image_end),gr8
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setlo %lo(__kernel_image_end),gr8
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sethi.p %hi(32768),gr4 ; allow for a maximal allocator bitmap
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setlo %lo(32768),gr4
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add gr8,gr4,gr8
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sethi.p %hi(1024*2048-1),gr4 ; round up to nearest 2MiB
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setlo %lo(1024*2048-1),gr4
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add.p gr8,gr4,gr8
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not gr4,gr4
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and gr8,gr4,gr8
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sethi.p %hi(__page_offset),gr9
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setlo %lo(__page_offset),gr9
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add gr9,gr25,gr9
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# GR8 = base of uncovered RAM
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# GR9 = top of uncovered RAM
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#ifdef CONFIG_MB93093_PDK
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sethi.p %hi(__region_CS2),gr4
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setlo %lo(__region_CS2),gr4
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ori gr4,#xAMPRx_SS_1Mb|xAMPRx_S_KERNEL|xAMPRx_C|xAMPRx_V,gr4
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movgs gr4,dampr6
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movgs gr0,iampr6
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#else
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call __head_split_region
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movgs gr4,iampr6
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movgs gr5,dampr6
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#endif
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call __head_split_region
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movgs gr4,iampr5
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movgs gr5,dampr5
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call __head_split_region
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movgs gr4,iampr4
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movgs gr5,dampr4
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call __head_split_region
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movgs gr4,iampr3
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movgs gr5,dampr3
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call __head_split_region
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movgs gr4,iampr2
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movgs gr5,dampr2
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call __head_split_region
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movgs gr4,iampr1
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movgs gr5,dampr1
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# cover kernel core image with kernel-only segment
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sethi.p %hi(__page_offset),gr8
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setlo %lo(__page_offset),gr8
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call __head_split_region
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#ifdef CONFIG_PROTECT_KERNEL
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ori.p gr4,#xAMPRx_S_KERNEL,gr4
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ori gr5,#xAMPRx_S_KERNEL,gr5
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#endif
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movgs gr4,iampr0
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movgs gr5,dampr0
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jmpl @(gr27,gr0)
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