xref: /openbmc/linux/arch/arm/mm/proc-arm9tdmi.S (revision 37744fee) 
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 *  linux/arch/arm/mm/proc-arm9tdmi.S: utility functions for ARM9TDMI
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_arm9tdmi_proc_init()
21 * cpu_arm9tdmi_do_idle()
22 * cpu_arm9tdmi_dcache_clean_area()
23 * cpu_arm9tdmi_switch_mm()
24 *
25 * These are not required.
26 */
27ENTRY(cpu_arm9tdmi_proc_init)
28ENTRY(cpu_arm9tdmi_do_idle)
29ENTRY(cpu_arm9tdmi_dcache_clean_area)
30ENTRY(cpu_arm9tdmi_switch_mm)
31		ret	lr
32
33/*
34 * cpu_arm9tdmi_proc_fin()
35 */
36ENTRY(cpu_arm9tdmi_proc_fin)
37		ret	lr
38
39/*
40 * Function: cpu_arm9tdmi_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_arm9tdmi_reset)
46		ret	r0
47ENDPROC(cpu_arm9tdmi_reset)
48		.popsection
49
50		.type	__arm9tdmi_setup, #function
51__arm9tdmi_setup:
52		ret	lr
53		.size	__arm9tdmi_setup, . - __arm9tdmi_setup
54
55		__INITDATA
56
57		@ define struct processor (see <asm/proc-fns.h> and proc-macros.S)
58		define_processor_functions arm9tdmi, dabort=nommu_early_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_arm9tdmi_name, "ARM9TDMI"
65		string	cpu_p2001_name, "P2001"
66
67		.align
68
69		.section ".proc.info.init", "a"
70
71.macro arm9tdmi_proc_info name:req, cpu_val:req, cpu_mask:req, cpu_name:req
72		.type	__\name\()_proc_info, #object
73__\name\()_proc_info:
74		.long	\cpu_val
75		.long	\cpu_mask
76		.long	0
77		.long	0
78		initfn	__arm9tdmi_setup, __\name\()_proc_info
79		.long	cpu_arch_name
80		.long	cpu_elf_name
81		.long	HWCAP_SWP | HWCAP_THUMB | HWCAP_26BIT
82		.long	\cpu_name
83		.long	arm9tdmi_processor_functions
84		.long	0
85		.long	0
86		.long	v4_cache_fns
87		.size	__\name\()_proc_info, . - __\name\()_proc_info
88.endm
89
90	arm9tdmi_proc_info arm9tdmi, 0x41009900, 0xfff8ff00, cpu_arm9tdmi_name
91	arm9tdmi_proc_info p2001, 0x41029000, 0xffffffff, cpu_p2001_name
92