xref: /openbmc/linux/arch/arm/mm/proc-arm7tdmi.S (revision 2169e6da) 
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 *  linux/arch/arm/mm/proc-arm7tdmi.S: utility functions for ARM7TDMI
4 *
5 *  Copyright (C) 2003-2006 Hyok S. Choi <hyok.choi@samsung.com>
6 */
7#include <linux/linkage.h>
8#include <linux/init.h>
9#include <asm/assembler.h>
10#include <asm/asm-offsets.h>
11#include <asm/hwcap.h>
12#include <asm/pgtable-hwdef.h>
13#include <asm/pgtable.h>
14#include <asm/ptrace.h>
15
16#include "proc-macros.S"
17
18	.text
19/*
20 * cpu_arm7tdmi_proc_init()
21 * cpu_arm7tdmi_do_idle()
22 * cpu_arm7tdmi_dcache_clean_area()
23 * cpu_arm7tdmi_switch_mm()
24 *
25 * These are not required.
26 */
27ENTRY(cpu_arm7tdmi_proc_init)
28ENTRY(cpu_arm7tdmi_do_idle)
29ENTRY(cpu_arm7tdmi_dcache_clean_area)
30ENTRY(cpu_arm7tdmi_switch_mm)
31		ret	lr
32
33/*
34 * cpu_arm7tdmi_proc_fin()
35 */
36ENTRY(cpu_arm7tdmi_proc_fin)
37		ret	lr
38
39/*
40 * Function: cpu_arm7tdmi_reset(loc)
41 * Params  : loc(r0)	address to jump to
42 * Purpose : Sets up everything for a reset and jump to the location for soft reset.
43 */
44		.pushsection	.idmap.text, "ax"
45ENTRY(cpu_arm7tdmi_reset)
46		ret	r0
47ENDPROC(cpu_arm7tdmi_reset)
48		.popsection
49
50		.type	__arm7tdmi_setup, #function
51__arm7tdmi_setup:
52		ret	lr
53		.size	__arm7tdmi_setup, . - __arm7tdmi_setup
54
55		__INITDATA
56
57		@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
58		define_processor_functions arm7tdmi, dabort=v4t_late_abort, pabort=legacy_pabort, nommu=1
59
60		.section ".rodata"
61
62		string	cpu_arch_name, "armv4t"
63		string	cpu_elf_name, "v4"
64		string	cpu_arm7tdmi_name, "ARM7TDMI"
65		string	cpu_triscenda7_name, "Triscend-A7x"
66		string	cpu_at91_name, "Atmel-AT91M40xxx"
67		string	cpu_s3c3410_name, "Samsung-S3C3410"
68		string	cpu_s3c44b0x_name, "Samsung-S3C44B0x"
69		string	cpu_s3c4510b_name, "Samsung-S3C4510B"
70		string	cpu_s3c4530_name, "Samsung-S3C4530"
71		string	cpu_netarm_name, "NETARM"
72
73		.align
74
75		.section ".proc.info.init", #alloc
76
77.macro arm7tdmi_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req, \
78	extra_hwcaps=0
79		.type	__\name\()_proc_info, #object
80__\name\()_proc_info:
81		.long	\cpu_val
82		.long	\cpu_mask
83		.long	0
84		.long	0
85		initfn	__arm7tdmi_setup, __\name\()_proc_info
86		.long	cpu_arch_name
87		.long	cpu_elf_name
88		.long	HWCAP_SWP | HWCAP_26BIT | ( \extra_hwcaps )
89		.long	\cpu_name
90		.long	arm7tdmi_processor_functions
91		.long	0
92		.long	0
93		.long	v4_cache_fns
94		.size	__\name\()_proc_info, . - __\name\()_proc_info
95.endm
96
97		arm7tdmi_proc_info arm7tdmi, 0x41007700, 0xfff8ff00, \
98			cpu_arm7tdmi_name
99		arm7tdmi_proc_info triscenda7, 0x0001d2ff, 0x0001ffff, \
100			cpu_triscenda7_name, extra_hwcaps=HWCAP_THUMB
101		arm7tdmi_proc_info at91, 0x14000040, 0xfff000e0, \
102			cpu_at91_name, extra_hwcaps=HWCAP_THUMB
103		arm7tdmi_proc_info s3c4510b, 0x36365000, 0xfffff000, \
104			cpu_s3c4510b_name, extra_hwcaps=HWCAP_THUMB
105		arm7tdmi_proc_info s3c4530, 0x4c000000, 0xfff000e0, \
106			cpu_s3c4530_name, extra_hwcaps=HWCAP_THUMB
107		arm7tdmi_proc_info s3c3410, 0x34100000, 0xffff0000, \
108			cpu_s3c3410_name, extra_hwcaps=HWCAP_THUMB
109		arm7tdmi_proc_info s3c44b0x, 0x44b00000, 0xffff0000, \
110			cpu_s3c44b0x_name, extra_hwcaps=HWCAP_THUMB
111