Fix common misspellings
[linux-2.6.git] / arch / arm / mm / proc-arm720.S
1 /*
2  *  linux/arch/arm/mm/proc-arm720.S: MMU functions for ARM720
3  *
4  *  Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
5  *                     Rob Scott (rscott@mtrob.fdns.net)
6  *  Copyright (C) 2000 ARM Limited, Deep Blue Solutions Ltd.
7  *  hacked for non-paged-MM by Hyok S. Choi, 2004.
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22  *
23  *
24  * These are the low level assembler for performing cache and TLB
25  * functions on the ARM720T.  The ARM720T has a writethrough IDC
26  * cache, so we don't need to clean it.
27  *
28  *  Changelog:
29  *   05-09-2000 SJH     Created by moving 720 specific functions
30  *                      out of 'proc-arm6,7.S' per RMK discussion
31  *   07-25-2000 SJH     Added idle function.
32  *   08-25-2000 DBS     Updated for integration of ARM Ltd version.
33  *   04-20-2004 HSC     modified for non-paged memory management mode.
34  */
35 #include <linux/linkage.h>
36 #include <linux/init.h>
37 #include <asm/assembler.h>
38 #include <asm/asm-offsets.h>
39 #include <asm/hwcap.h>
40 #include <asm/pgtable-hwdef.h>
41 #include <asm/pgtable.h>
42 #include <asm/ptrace.h>
43
44 #include "proc-macros.S"
45
46 /*
47  * Function: arm720_proc_init (void)
48  *         : arm720_proc_fin (void)
49  *
50  * Notes   : This processor does not require these
51  */
52 ENTRY(cpu_arm720_dcache_clean_area)
53 ENTRY(cpu_arm720_proc_init)
54                 mov     pc, lr
55
56 ENTRY(cpu_arm720_proc_fin)
57                 mrc     p15, 0, r0, c1, c0, 0
58                 bic     r0, r0, #0x1000                 @ ...i............
59                 bic     r0, r0, #0x000e                 @ ............wca.
60                 mcr     p15, 0, r0, c1, c0, 0           @ disable caches
61                 mov     pc, lr
62
63 /*
64  * Function: arm720_proc_do_idle(void)
65  * Params  : r0 = unused
66  * Purpose : put the processor in proper idle mode
67  */
68 ENTRY(cpu_arm720_do_idle)
69                 mov     pc, lr
70
71 /*
72  * Function: arm720_switch_mm(unsigned long pgd_phys)
73  * Params  : pgd_phys   Physical address of page table
74  * Purpose : Perform a task switch, saving the old process' state and restoring
75  *           the new.
76  */
77 ENTRY(cpu_arm720_switch_mm)
78 #ifdef CONFIG_MMU
79                 mov     r1, #0
80                 mcr     p15, 0, r1, c7, c7, 0           @ invalidate cache
81                 mcr     p15, 0, r0, c2, c0, 0           @ update page table ptr
82                 mcr     p15, 0, r1, c8, c7, 0           @ flush TLB (v4)
83 #endif
84                 mov     pc, lr
85
86 /*
87  * Function: arm720_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext)
88  * Params  : r0 = Address to set
89  *         : r1 = value to set
90  * Purpose : Set a PTE and flush it out of any WB cache
91  */
92         .align  5
93 ENTRY(cpu_arm720_set_pte_ext)
94 #ifdef CONFIG_MMU
95         armv3_set_pte_ext wc_disable=0
96 #endif
97         mov     pc, lr
98
99 /*
100  * Function: arm720_reset
101  * Params  : r0 = address to jump to
102  * Notes   : This sets up everything for a reset
103  */
104 ENTRY(cpu_arm720_reset)
105                 mov     ip, #0
106                 mcr     p15, 0, ip, c7, c7, 0           @ invalidate cache
107 #ifdef CONFIG_MMU
108                 mcr     p15, 0, ip, c8, c7, 0           @ flush TLB (v4)
109 #endif
110                 mrc     p15, 0, ip, c1, c0, 0           @ get ctrl register
111                 bic     ip, ip, #0x000f                 @ ............wcam
112                 bic     ip, ip, #0x2100                 @ ..v....s........
113                 mcr     p15, 0, ip, c1, c0, 0           @ ctrl register
114                 mov     pc, r0
115
116         __CPUINIT
117
118         .type   __arm710_setup, #function
119 __arm710_setup:
120         mov     r0, #0
121         mcr     p15, 0, r0, c7, c7, 0           @ invalidate caches
122 #ifdef CONFIG_MMU
123         mcr     p15, 0, r0, c8, c7, 0           @ flush TLB (v4)
124 #endif
125         mrc     p15, 0, r0, c1, c0              @ get control register
126         ldr     r5, arm710_cr1_clear
127         bic     r0, r0, r5
128         ldr     r5, arm710_cr1_set
129         orr     r0, r0, r5
130         mov     pc, lr                          @ __ret (head.S)
131         .size   __arm710_setup, . - __arm710_setup
132
133         /*
134          *  R
135          * .RVI ZFRS BLDP WCAM
136          * .... 0001 ..11 1101
137          * 
138          */
139         .type   arm710_cr1_clear, #object
140         .type   arm710_cr1_set, #object
141 arm710_cr1_clear:
142         .word   0x0f3f
143 arm710_cr1_set:
144         .word   0x013d
145
146         .type   __arm720_setup, #function
147 __arm720_setup:
148         mov     r0, #0
149         mcr     p15, 0, r0, c7, c7, 0           @ invalidate caches
150 #ifdef CONFIG_MMU
151         mcr     p15, 0, r0, c8, c7, 0           @ flush TLB (v4)
152 #endif
153         adr     r5, arm720_crval
154         ldmia   r5, {r5, r6}
155         mrc     p15, 0, r0, c1, c0              @ get control register
156         bic     r0, r0, r5
157         orr     r0, r0, r6
158         mov     pc, lr                          @ __ret (head.S)
159         .size   __arm720_setup, . - __arm720_setup
160
161         /*
162          *  R
163          * .RVI ZFRS BLDP WCAM
164          * ..1. 1001 ..11 1101
165          * 
166          */
167         .type   arm720_crval, #object
168 arm720_crval:
169         crval   clear=0x00002f3f, mmuset=0x0000213d, ucset=0x00000130
170
171                 __INITDATA
172
173 /*
174  * Purpose : Function pointers used to access above functions - all calls
175  *           come through these
176  */
177                 .type   arm720_processor_functions, #object
178 ENTRY(arm720_processor_functions)
179                 .word   v4t_late_abort
180                 .word   legacy_pabort
181                 .word   cpu_arm720_proc_init
182                 .word   cpu_arm720_proc_fin
183                 .word   cpu_arm720_reset
184                 .word   cpu_arm720_do_idle
185                 .word   cpu_arm720_dcache_clean_area
186                 .word   cpu_arm720_switch_mm
187                 .word   cpu_arm720_set_pte_ext
188                 .word   0
189                 .word   0
190                 .word   0
191                 .size   arm720_processor_functions, . - arm720_processor_functions
192
193                 .section ".rodata"
194
195                 .type   cpu_arch_name, #object
196 cpu_arch_name:  .asciz  "armv4t"
197                 .size   cpu_arch_name, . - cpu_arch_name
198
199                 .type   cpu_elf_name, #object
200 cpu_elf_name:   .asciz  "v4"
201                 .size   cpu_elf_name, . - cpu_elf_name
202
203                 .type   cpu_arm710_name, #object
204 cpu_arm710_name:
205                 .asciz  "ARM710T"
206                 .size   cpu_arm710_name, . - cpu_arm710_name
207
208                 .type   cpu_arm720_name, #object
209 cpu_arm720_name:
210                 .asciz  "ARM720T"
211                 .size   cpu_arm720_name, . - cpu_arm720_name
212
213                 .align
214
215 /*
216  * See <asm/procinfo.h> for a definition of this structure.
217  */
218         
219                 .section ".proc.info.init", #alloc, #execinstr
220
221                 .type   __arm710_proc_info, #object
222 __arm710_proc_info:
223                 .long   0x41807100                              @ cpu_val
224                 .long   0xffffff00                              @ cpu_mask
225                 .long   PMD_TYPE_SECT | \
226                         PMD_SECT_BUFFERABLE | \
227                         PMD_SECT_CACHEABLE | \
228                         PMD_BIT4 | \
229                         PMD_SECT_AP_WRITE | \
230                         PMD_SECT_AP_READ
231                 .long   PMD_TYPE_SECT | \
232                         PMD_BIT4 | \
233                         PMD_SECT_AP_WRITE | \
234                         PMD_SECT_AP_READ
235                 b       __arm710_setup                          @ cpu_flush
236                 .long   cpu_arch_name                           @ arch_name
237                 .long   cpu_elf_name                            @ elf_name
238                 .long   HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB    @ elf_hwcap
239                 .long   cpu_arm710_name                         @ name
240                 .long   arm720_processor_functions
241                 .long   v4_tlb_fns
242                 .long   v4wt_user_fns
243                 .long   v4_cache_fns
244                 .size   __arm710_proc_info, . - __arm710_proc_info
245
246                 .type   __arm720_proc_info, #object
247 __arm720_proc_info:
248                 .long   0x41807200                              @ cpu_val
249                 .long   0xffffff00                              @ cpu_mask
250                 .long   PMD_TYPE_SECT | \
251                         PMD_SECT_BUFFERABLE | \
252                         PMD_SECT_CACHEABLE | \
253                         PMD_BIT4 | \
254                         PMD_SECT_AP_WRITE | \
255                         PMD_SECT_AP_READ
256                 .long   PMD_TYPE_SECT | \
257                         PMD_BIT4 | \
258                         PMD_SECT_AP_WRITE | \
259                         PMD_SECT_AP_READ
260                 b       __arm720_setup                          @ cpu_flush
261                 .long   cpu_arch_name                           @ arch_name
262                 .long   cpu_elf_name                            @ elf_name
263                 .long   HWCAP_SWP | HWCAP_HALF | HWCAP_THUMB    @ elf_hwcap
264                 .long   cpu_arm720_name                         @ name
265                 .long   arm720_processor_functions
266                 .long   v4_tlb_fns
267                 .long   v4wt_user_fns
268                 .long   v4_cache_fns
269                 .size   __arm720_proc_info, . - __arm720_proc_info