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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1a4baafa7d
The CPU reset functions disable the MMU and therefore must be executed with an identity mapping in place. This patch places the CPU reset functions into the .idmap.text section, causing the idmap code to include them as part of the identity mapping. Acked-by: Dave Martin <dave.martin@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
117 lines
3.1 KiB
ArmAsm
117 lines
3.1 KiB
ArmAsm
/*
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* linux/arch/arm/mm/proc-arm7tdmi.S: utility functions for ARM7TDMI
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*
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* Copyright (C) 2003-2006 Hyok S. Choi <hyok.choi@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/linkage.h>
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#include <linux/init.h>
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#include <asm/assembler.h>
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#include <asm/asm-offsets.h>
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#include <asm/hwcap.h>
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#include <asm/pgtable-hwdef.h>
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#include <asm/pgtable.h>
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#include <asm/ptrace.h>
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#include "proc-macros.S"
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.text
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/*
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* cpu_arm7tdmi_proc_init()
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* cpu_arm7tdmi_do_idle()
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* cpu_arm7tdmi_dcache_clean_area()
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* cpu_arm7tdmi_switch_mm()
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*
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* These are not required.
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*/
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ENTRY(cpu_arm7tdmi_proc_init)
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ENTRY(cpu_arm7tdmi_do_idle)
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ENTRY(cpu_arm7tdmi_dcache_clean_area)
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ENTRY(cpu_arm7tdmi_switch_mm)
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mov pc, lr
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/*
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* cpu_arm7tdmi_proc_fin()
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*/
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ENTRY(cpu_arm7tdmi_proc_fin)
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mov pc, lr
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/*
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* Function: cpu_arm7tdmi_reset(loc)
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* Params : loc(r0) address to jump to
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* Purpose : Sets up everything for a reset and jump to the location for soft reset.
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*/
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.pushsection .idmap.text, "ax"
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ENTRY(cpu_arm7tdmi_reset)
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mov pc, r0
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ENDPROC(cpu_arm7tdmi_reset)
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.popsection
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__CPUINIT
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.type __arm7tdmi_setup, #function
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__arm7tdmi_setup:
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mov pc, lr
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.size __arm7tdmi_setup, . - __arm7tdmi_setup
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__INITDATA
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@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
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define_processor_functions arm7tdmi, dabort=v4t_late_abort, pabort=legacy_pabort, nommu=1
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.section ".rodata"
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string cpu_arch_name, "armv4t"
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string cpu_elf_name, "v4"
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string cpu_arm7tdmi_name, "ARM7TDMI"
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string cpu_triscenda7_name, "Triscend-A7x"
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string cpu_at91_name, "Atmel-AT91M40xxx"
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string cpu_s3c3410_name, "Samsung-S3C3410"
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string cpu_s3c44b0x_name, "Samsung-S3C44B0x"
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string cpu_s3c4510b_name, "Samsung-S3C4510B"
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string cpu_s3c4530_name, "Samsung-S3C4530"
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string cpu_netarm_name, "NETARM"
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.align
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.section ".proc.info.init", #alloc, #execinstr
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.macro arm7tdmi_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req, \
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extra_hwcaps=0
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.type __\name\()_proc_info, #object
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__\name\()_proc_info:
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.long \cpu_val
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.long \cpu_mask
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.long 0
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.long 0
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b __arm7tdmi_setup
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.long cpu_arch_name
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.long cpu_elf_name
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.long HWCAP_SWP | HWCAP_26BIT | ( \extra_hwcaps )
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.long \cpu_name
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.long arm7tdmi_processor_functions
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.long 0
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.long 0
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.long v4_cache_fns
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.size __\name\()_proc_info, . - __\name\()_proc_info
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.endm
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arm7tdmi_proc_info arm7tdmi, 0x41007700, 0xfff8ff00, \
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cpu_arm7tdmi_name
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arm7tdmi_proc_info triscenda7, 0x0001d2ff, 0x0001ffff, \
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cpu_triscenda7_name, extra_hwcaps=HWCAP_THUMB
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arm7tdmi_proc_info at91, 0x14000040, 0xfff000e0, \
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cpu_at91_name, extra_hwcaps=HWCAP_THUMB
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arm7tdmi_proc_info s3c4510b, 0x36365000, 0xfffff000, \
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cpu_s3c4510b_name, extra_hwcaps=HWCAP_THUMB
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arm7tdmi_proc_info s3c4530, 0x4c000000, 0xfff000e0, \
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cpu_s3c4530_name, extra_hwcaps=HWCAP_THUMB
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arm7tdmi_proc_info s3c3410, 0x34100000, 0xffff0000, \
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cpu_s3c3410_name, extra_hwcaps=HWCAP_THUMB
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arm7tdmi_proc_info s3c44b0x, 0x44b00000, 0xffff0000, \
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cpu_s3c44b0x_name, extra_hwcaps=HWCAP_THUMB
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