linux/arch/arm/mm/proc-arm7tdmi.S
Ard Biesheuvel bf35706f3d ARM: 8314/1: replace PROCINFO embedded branch with relative offset
This patch replaces the 'branch to setup()' instructions embedded
in the PROCINFO structs with the offset to that setup function
relative to the base of the struct. This preserves the position
independent nature of that field, but uses a data item rather
than an instruction.

This is mainly done to prevent linker failures on large kernels,
where the setup function is out of reach for the branch.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-03-28 15:46:14 +00:00

115 lines
3.1 KiB
ArmAsm

/*
* linux/arch/arm/mm/proc-arm7tdmi.S: utility functions for ARM7TDMI
*
* Copyright (C) 2003-2006 Hyok S. Choi <hyok.choi@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/hwcap.h>
#include <asm/pgtable-hwdef.h>
#include <asm/pgtable.h>
#include <asm/ptrace.h>
#include "proc-macros.S"
.text
/*
* cpu_arm7tdmi_proc_init()
* cpu_arm7tdmi_do_idle()
* cpu_arm7tdmi_dcache_clean_area()
* cpu_arm7tdmi_switch_mm()
*
* These are not required.
*/
ENTRY(cpu_arm7tdmi_proc_init)
ENTRY(cpu_arm7tdmi_do_idle)
ENTRY(cpu_arm7tdmi_dcache_clean_area)
ENTRY(cpu_arm7tdmi_switch_mm)
ret lr
/*
* cpu_arm7tdmi_proc_fin()
*/
ENTRY(cpu_arm7tdmi_proc_fin)
ret lr
/*
* Function: cpu_arm7tdmi_reset(loc)
* Params : loc(r0) address to jump to
* Purpose : Sets up everything for a reset and jump to the location for soft reset.
*/
.pushsection .idmap.text, "ax"
ENTRY(cpu_arm7tdmi_reset)
ret r0
ENDPROC(cpu_arm7tdmi_reset)
.popsection
.type __arm7tdmi_setup, #function
__arm7tdmi_setup:
ret lr
.size __arm7tdmi_setup, . - __arm7tdmi_setup
__INITDATA
@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
define_processor_functions arm7tdmi, dabort=v4t_late_abort, pabort=legacy_pabort, nommu=1
.section ".rodata"
string cpu_arch_name, "armv4t"
string cpu_elf_name, "v4"
string cpu_arm7tdmi_name, "ARM7TDMI"
string cpu_triscenda7_name, "Triscend-A7x"
string cpu_at91_name, "Atmel-AT91M40xxx"
string cpu_s3c3410_name, "Samsung-S3C3410"
string cpu_s3c44b0x_name, "Samsung-S3C44B0x"
string cpu_s3c4510b_name, "Samsung-S3C4510B"
string cpu_s3c4530_name, "Samsung-S3C4530"
string cpu_netarm_name, "NETARM"
.align
.section ".proc.info.init", #alloc
.macro arm7tdmi_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req, \
extra_hwcaps=0
.type __\name\()_proc_info, #object
__\name\()_proc_info:
.long \cpu_val
.long \cpu_mask
.long 0
.long 0
initfn __arm7tdmi_setup, __\name\()_proc_info
.long cpu_arch_name
.long cpu_elf_name
.long HWCAP_SWP | HWCAP_26BIT | ( \extra_hwcaps )
.long \cpu_name
.long arm7tdmi_processor_functions
.long 0
.long 0
.long v4_cache_fns
.size __\name\()_proc_info, . - __\name\()_proc_info
.endm
arm7tdmi_proc_info arm7tdmi, 0x41007700, 0xfff8ff00, \
cpu_arm7tdmi_name
arm7tdmi_proc_info triscenda7, 0x0001d2ff, 0x0001ffff, \
cpu_triscenda7_name, extra_hwcaps=HWCAP_THUMB
arm7tdmi_proc_info at91, 0x14000040, 0xfff000e0, \
cpu_at91_name, extra_hwcaps=HWCAP_THUMB
arm7tdmi_proc_info s3c4510b, 0x36365000, 0xfffff000, \
cpu_s3c4510b_name, extra_hwcaps=HWCAP_THUMB
arm7tdmi_proc_info s3c4530, 0x4c000000, 0xfff000e0, \
cpu_s3c4530_name, extra_hwcaps=HWCAP_THUMB
arm7tdmi_proc_info s3c3410, 0x34100000, 0xffff0000, \
cpu_s3c3410_name, extra_hwcaps=HWCAP_THUMB
arm7tdmi_proc_info s3c44b0x, 0x44b00000, 0xffff0000, \
cpu_s3c44b0x_name, extra_hwcaps=HWCAP_THUMB