Merge branch 'v6v7' into devel
[linux/fpc-iii.git] / arch / arm / mm / proc-arm740.S
blob6f9d12effee18ccd1bceefa1490093702090c602
1 /*
2  *  linux/arch/arm/mm/arm740.S: utility functions for ARM740
3  *
4  *  Copyright (C) 2004-2006 Hyok S. Choi (hyok.choi@samsung.com)
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  *
10  */
11 #include <linux/linkage.h>
12 #include <linux/init.h>
13 #include <asm/assembler.h>
14 #include <asm/asm-offsets.h>
15 #include <asm/hwcap.h>
16 #include <asm/pgtable-hwdef.h>
17 #include <asm/pgtable.h>
18 #include <asm/ptrace.h>
20         .text
22  * cpu_arm740_proc_init()
23  * cpu_arm740_do_idle()
24  * cpu_arm740_dcache_clean_area()
25  * cpu_arm740_switch_mm()
26  *
27  * These are not required.
28  */
29 ENTRY(cpu_arm740_proc_init)
30 ENTRY(cpu_arm740_do_idle)
31 ENTRY(cpu_arm740_dcache_clean_area)
32 ENTRY(cpu_arm740_switch_mm)
33         mov     pc, lr
36  * cpu_arm740_proc_fin()
37  */
38 ENTRY(cpu_arm740_proc_fin)
39         mrc     p15, 0, r0, c1, c0, 0
40         bic     r0, r0, #0x3f000000             @ bank/f/lock/s
41         bic     r0, r0, #0x0000000c             @ w-buffer/cache
42         mcr     p15, 0, r0, c1, c0, 0           @ disable caches
43         mov     pc, lr
46  * cpu_arm740_reset(loc)
47  * Params  : r0 = address to jump to
48  * Notes   : This sets up everything for a reset
49  */
50 ENTRY(cpu_arm740_reset)
51         mov     ip, #0
52         mcr     p15, 0, ip, c7, c0, 0           @ invalidate cache
53         mrc     p15, 0, ip, c1, c0, 0           @ get ctrl register
54         bic     ip, ip, #0x0000000c             @ ............wc..
55         mcr     p15, 0, ip, c1, c0, 0           @ ctrl register
56         mov     pc, r0
58         __CPUINIT
60         .type   __arm740_setup, #function
61 __arm740_setup:
62         mov     r0, #0
63         mcr     p15, 0, r0, c7, c0, 0           @ invalidate caches
65         mcr     p15, 0, r0, c6, c3              @ disable area 3~7
66         mcr     p15, 0, r0, c6, c4
67         mcr     p15, 0, r0, c6, c5
68         mcr     p15, 0, r0, c6, c6
69         mcr     p15, 0, r0, c6, c7
71         mov     r0, #0x0000003F                 @ base = 0, size = 4GB
72         mcr     p15, 0, r0, c6, c0              @ set area 0, default
74         ldr     r0, =(CONFIG_DRAM_BASE & 0xFFFFF000) @ base[31:12] of RAM
75         ldr     r1, =(CONFIG_DRAM_SIZE >> 12)   @ size of RAM (must be >= 4KB)
76         mov     r2, #10                         @ 11 is the minimum (4KB)
77 1:      add     r2, r2, #1                      @ area size *= 2
78         mov     r1, r1, lsr #1
79         bne     1b                              @ count not zero r-shift
80         orr     r0, r0, r2, lsl #1              @ the area register value
81         orr     r0, r0, #1                      @ set enable bit
82         mcr     p15, 0, r0, c6, c1              @ set area 1, RAM
84         ldr     r0, =(CONFIG_FLASH_MEM_BASE & 0xFFFFF000) @ base[31:12] of FLASH
85         ldr     r1, =(CONFIG_FLASH_SIZE >> 12)  @ size of FLASH (must be >= 4KB)
86         mov     r2, #10                         @ 11 is the minimum (4KB)
87 1:      add     r2, r2, #1                      @ area size *= 2
88         mov     r1, r1, lsr #1
89         bne     1b                              @ count not zero r-shift
90         orr     r0, r0, r2, lsl #1              @ the area register value
91         orr     r0, r0, #1                      @ set enable bit
92         mcr     p15, 0, r0, c6, c2              @ set area 2, ROM/FLASH
94         mov     r0, #0x06
95         mcr     p15, 0, r0, c2, c0              @ Region 1&2 cacheable
96 #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
97         mov     r0, #0x00                       @ disable whole write buffer
98 #else
99         mov     r0, #0x02                       @ Region 1 write bufferred
100 #endif
101         mcr     p15, 0, r0, c3, c0
103         mov     r0, #0x10000
104         sub     r0, r0, #1                      @ r0 = 0xffff
105         mcr     p15, 0, r0, c5, c0              @ all read/write access
107         mrc     p15, 0, r0, c1, c0              @ get control register
108         bic     r0, r0, #0x3F000000             @ set to standard caching mode
109                                                 @ need some benchmark
110         orr     r0, r0, #0x0000000d             @ MPU/Cache/WB
112         mov     pc, lr
114         .size   __arm740_setup, . - __arm740_setup
116         __INITDATA
119  * Purpose : Function pointers used to access above functions - all calls
120  *           come through these
121  */
122         .type   arm740_processor_functions, #object
123 ENTRY(arm740_processor_functions)
124         .word   v4t_late_abort
125         .word   legacy_pabort
126         .word   cpu_arm740_proc_init
127         .word   cpu_arm740_proc_fin
128         .word   cpu_arm740_reset
129         .word   cpu_arm740_do_idle
130         .word   cpu_arm740_dcache_clean_area
131         .word   cpu_arm740_switch_mm
132         .word   0                       @ cpu_*_set_pte
133         .word   0
134         .word   0
135         .word   0
136         .size   arm740_processor_functions, . - arm740_processor_functions
138         .section ".rodata"
140         .type   cpu_arch_name, #object
141 cpu_arch_name:
142         .asciz  "armv4"
143         .size   cpu_arch_name, . - cpu_arch_name
145         .type   cpu_elf_name, #object
146 cpu_elf_name:
147         .asciz  "v4"
148         .size   cpu_elf_name, . - cpu_elf_name
150         .type   cpu_arm740_name, #object
151 cpu_arm740_name:
152         .ascii  "ARM740T"
153         .size   cpu_arm740_name, . - cpu_arm740_name
155         .align
157         .section ".proc.info.init", #alloc, #execinstr
158         .type   __arm740_proc_info,#object
159 __arm740_proc_info:
160         .long   0x41807400
161         .long   0xfffffff0
162         .long   0
163         b       __arm740_setup
164         .long   cpu_arch_name
165         .long   cpu_elf_name
166         .long   HWCAP_SWP | HWCAP_HALF | HWCAP_26BIT
167         .long   cpu_arm740_name
168         .long   arm740_processor_functions
169         .long   0
170         .long   0
171         .long   v3_cache_fns                    @ cache model
172         .size   __arm740_proc_info, . - __arm740_proc_info