Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier...
[linux-2.6] / arch / m32r / boot / setup.S
1 /*
2  *  linux/arch/m32r/boot/setup.S -- A setup code.
3  *
4  *  Copyright (C) 2001-2005   Hiroyuki Kondo, Hirokazu Takata,
5  *                            Hitoshi Yamamoto, Hayato Fujiwara
6  *
7  */
8
9 #include <linux/linkage.h>
10 #include <asm/segment.h>
11 #include <asm/page.h>
12 #include <asm/pgtable.h>
13
14 #include <asm/assembler.h>
15 #include <asm/mmu_context.h>
16 #include <asm/m32r.h>
17
18 /*
19  * References to members of the boot_cpu_data structure.
20  */
21
22 #define CPU_PARAMS      boot_cpu_data
23 #define M32R_MCICAR      0xfffffff0
24 #define M32R_MCDCAR      0xfffffff4
25 #define M32R_MCCR        0xfffffffc
26 #define M32R_BSCR0       0xffffffd2
27
28 ;BSEL
29 #define BSEL0CR0         0x00ef5000
30 #define BSEL0CR1         0x00ef5004
31 #define BSEL1CR0         0x00ef5100
32 #define BSEL1CR1         0x00ef5104
33 #define BSEL0CR0_VAL     0x00000000
34 #define BSEL0CR1_VAL     0x01200100
35 #define BSEL1CR0_VAL     0x01018000
36 #define BSEL1CR1_VAL     0x00200001
37
38 ;SDRAMC
39 #define SDRAMC_SDRF0     0x00ef6000
40 #define SDRAMC_SDRF1     0x00ef6004
41 #define SDRAMC_SDIR0     0x00ef6008
42 #define SDRAMC_SDIR1     0x00ef600c
43 #define SDRAMC_SD0ADR    0x00ef6020
44 #define SDRAMC_SD0ER     0x00ef6024
45 #define SDRAMC_SD0TR     0x00ef6028
46 #define SDRAMC_SD0MOD    0x00ef602c
47 #define SDRAMC_SD1ADR    0x00ef6040
48 #define SDRAMC_SD1ER     0x00ef6044
49 #define SDRAMC_SD1TR     0x00ef6048
50 #define SDRAMC_SD1MOD    0x00ef604c
51 #define SDRAM0           0x18000000
52 #define SDRAM1           0x1c000000
53
54 /*------------------------------------------------------------------------
55  * start up
56  */
57
58 /*------------------------------------------------------------------------
59  * Kernel entry
60  */
61         .section .boot, "ax"
62 ENTRY(boot)
63
64 /* Set cache mode */
65 #if defined(CONFIG_CHIP_XNUX2)
66         ldi     r0, #-2              ;LDIMM     (r0, M32R_MCCR)
67         ldi     r1, #0x0101             ; cache on (with invalidation)
68 ;       ldi     r1, #0x00               ; cache off
69         sth     r1, @r0
70 #elif defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_VDEC2) \
71     || defined(CONFIG_CHIP_OPSP)
72         ldi     r0, #-4              ;LDIMM     (r0, M32R_MCCR)
73         ldi     r1, #0x73               ; cache on (with invalidation)
74 ;       ldi     r1, #0x00               ; cache off
75         st      r1, @r0
76 #elif defined(CONFIG_CHIP_M32102)
77         ldi     r0, #-4              ;LDIMM     (r0, M32R_MCCR)
78         ldi     r1, #0x101              ; cache on (with invalidation)
79 ;       ldi     r1, #0x00               ; cache off
80         st      r1, @r0
81 #elif defined(CONFIG_CHIP_M32104)
82         ldi     r0, #-96                ; DNCR0
83         seth    r1, #0x0060             ;  from 0x00600000
84         or3     r1, r1, #0x0005         ;  size 2MB
85         st      r1, @r0
86         seth    r1, #0x0100             ;  from 0x01000000
87         or3     r1, r1, #0x0003         ;  size 16MB
88         st      r1, @+r0
89         seth    r1, #0x0200             ;  from 0x02000000
90         or3     r1, r1, #0x0002         ;  size 32MB
91         st      r1, @+r0
92         ldi     r0, #-4              ;LDIMM     (r0, M32R_MCCR)
93         ldi     r1, #0x703              ; cache on (with invalidation)
94         st      r1, @r0
95 #else
96 #error unknown chip configuration
97 #endif
98
99 #ifdef CONFIG_SMP
100         ;; if not BSP (CPU#0) goto AP_loop
101         seth    r5, #shigh(M32R_CPUID_PORTL)
102         ld      r5, @(low(M32R_CPUID_PORTL), r5)
103         bnez    r5, AP_loop
104 #if !defined(CONFIG_PLAT_USRV)
105         ;; boot AP
106         ld24    r5, #0xeff2f8           ; IPICR7
107         ldi     r6, #0x2                ; IPI to CPU1
108         st      r6, @r5
109 #endif
110 #endif
111
112 /*
113  *  Now, Jump to stext
114  *        if with MMU,    TLB on.
115  *        if with no MMU, only jump.
116  */
117         .global eit_vector
118 mmu_on:
119         LDIMM   (r13, stext)
120 #ifdef CONFIG_MMU
121         bl      init_tlb
122         LDIMM   (r2, eit_vector)                ; set EVB(cr5)
123         mvtc    r2, cr5
124         seth    r0, #high(MMU_REG_BASE)         ; Set MMU_REG_BASE higher
125         or3     r0, r0, #low(MMU_REG_BASE)      ; Set MMU_REG_BASE lower
126         ldi     r1, #0x01
127         st      r1, @(MATM_offset,r0)           ; Set MATM (T bit ON)
128         ld      r0, @(MATM_offset,r0)           ; Check
129 #else
130 #if defined(CONFIG_CHIP_M32700)
131         seth    r0,#high(M32R_MCDCAR)
132         or3     r0,r0,#low(M32R_MCDCAR)
133         ld24    r1,#0x8080
134         st      r1,@r0
135 #elif defined(CONFIG_CHIP_M32104)
136         LDIMM   (r2, eit_vector)                ; set EVB(cr5)
137         mvtc    r2, cr5
138 #endif
139 #endif  /* CONFIG_MMU */
140         jmp     r13
141         nop
142         nop
143
144 #ifdef CONFIG_SMP
145 /*
146  * AP wait loop
147  */
148 ENTRY(AP_loop)
149         ;; disable interrupt
150         clrpsw  #0x40
151         ;; reset EVB
152         LDIMM   (r4, _AP_RE)
153         seth    r5, #high(__PAGE_OFFSET)
154         or3     r5, r5, #low(__PAGE_OFFSET)
155         not     r5, r5
156         and     r4, r5
157         mvtc    r4, cr5
158         ;; disable maskable interrupt
159         seth    r4, #high(M32R_ICU_IMASK_PORTL)
160         or3     r4, r4, #low(M32R_ICU_IMASK_PORTL)
161         ldi     r5, #0
162         st      r5, @r4
163         ld      r5, @r4
164         ;; enable only IPI
165         setpsw  #0x40
166         ;; LOOOOOOOOOOOOOOP!!!
167         .fillinsn
168 2:
169         nop
170         nop
171         bra     2b
172         nop
173         nop
174
175 #ifdef CONFIG_CHIP_M32700_TS1
176         .global dcache_dummy
177         .balign 16, 0
178 dcache_dummy:
179         .byte   16
180 #endif  /* CONFIG_CHIP_M32700_TS1 */
181 #endif  /* CONFIG_SMP */
182
183         .end
184