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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 771e05be07589ca159d361142387e03fd26d2f6d / . / board / esd / cpci750 / misc.S
blob: ec5d9ecc489406b95e89a48971e23626e63ad339 [file] [log] [blame]
stroese771e05b2004-12-16 18:21:17 +0000[diff] [blame^]1#include <config.h>
2#include <74xx_7xx.h>
3#include "version.h"
4
5#include <ppc_asm.tmpl>
6#include <ppc_defs.h>
7
8#include <asm/cache.h>
9#include <asm/mmu.h>
10
11#include "../../Marvell/include/mv_gen_reg.h"
12
13#ifdef CONFIG_ECC
14 /* Galileo specific asm code for initializing ECC */
15 .globl board_relocate_rom
16board_relocate_rom:
17 mflr r7
18 /* update the location of the GT registers */
19 lis r11, CFG_GT_REGS@h
20 /* if we're using ECC, we must use the DMA engine to copy ourselves */
21 bl start_idma_transfer_0
22 bl wait_for_idma_0
23 bl stop_idma_engine_0
24
25 mtlr r7
26 blr
27
28 .globl board_init_ecc
29board_init_ecc:
30 mflr r7
31 /* NOTE: r10 still contains the location we've been relocated to
32 * which happens to be TOP_OF_RAM - CFG_MONITOR_LEN */
33
34 /* now that we're running from ram, init the rest of main memory
35 * for ECC use */
36 lis r8, CFG_MONITOR_LEN@h
37 ori r8, r8, CFG_MONITOR_LEN@l
38
39 divw r3, r10, r8
40
41 /* set up the counter, and init the starting address */
42 mtctr r3
43 li r12, 0
44
45 /* bytes per transfer */
46 mr r5, r8
47about_to_init_ecc:
481: mr r3, r12
49 mr r4, r12
50 bl start_idma_transfer_0
51 bl wait_for_idma_0
52 bl stop_idma_engine_0
53 add r12, r12, r8
54 bdnz 1b
55
56 mtlr r7
57 blr
58
59 /* r3: dest addr
60 * r4: source addr
61 * r5: byte count
62 * r11: gt regbase
63 * trashes: r6, r5
64 */
65start_idma_transfer_0:
66 /* set the byte count, including the OWN bit */
67 mr r6, r11
68 ori r6, r6, CHANNEL0_DMA_BYTE_COUNT
69 stwbrx r5, 0, (r6)
70
71 /* set the source address */
72 mr r6, r11
73 ori r6, r6, CHANNEL0_DMA_SOURCE_ADDRESS
74 stwbrx r4, 0, (r6)
75
76 /* set the dest address */
77 mr r6, r11
78 ori r6, r6, CHANNEL0_DMA_DESTINATION_ADDRESS
79 stwbrx r3, 0, (r6)
80
81 /* set the next record pointer */
82 li r5, 0
83 mr r6, r11
84 ori r6, r6, CHANNEL0NEXT_RECORD_POINTER
85 stwbrx r5, 0, (r6)
86
87 /* set the low control register */
88 /* bit 9 is NON chained mode, bit 31 is new style descriptors.
89 bit 12 is channel enable */
90 ori r5, r5, (1 << 12) | (1 << 12) | (1 << 11)
91 /* 15 shifted by 16 (oris) == bit 31 */
92 oris r5, r5, (1 << 15)
93 mr r6, r11
94 ori r6, r6, CHANNEL0CONTROL
95 stwbrx r5, 0, (r6)
96
97 blr
98
99 /* this waits for the bytecount to return to zero, indicating
100 * that the trasfer is complete */
101wait_for_idma_0:
102 mr r5, r11
103 lis r6, 0xff
104 ori r6, r6, 0xffff
105 ori r5, r5, CHANNEL0_DMA_BYTE_COUNT
1061: lwbrx r4, 0, (r5)
107 and. r4, r4, r6
108 bne 1b
109
110 blr
111
112 /* this turns off channel 0 of the idma engine */
113stop_idma_engine_0:
114 /* shut off the DMA engine */
115 li r5, 0
116 mr r6, r11
117 ori r6, r6, CHANNEL0CONTROL
118 stwbrx r5, 0, (r6)
119
120 blr
121#endif
122
123#ifdef CFG_BOARD_ASM_INIT
124 /* NOTE: trashes r3-r7 */
125 .globl board_asm_init
126board_asm_init:
127 /* just move the GT registers to where they belong */
128 lis r3, CFG_DFL_GT_REGS@h
129 ori r3, r3, CFG_DFL_GT_REGS@l
130 lis r4, CFG_GT_REGS@h
131 ori r4, r4, CFG_GT_REGS@l
132 li r5, INTERNAL_SPACE_DECODE
133
134 /* test to see if we've already moved */
135 lwbrx r6, r5, r4
136 andi. r6, r6, 0xffff
137 /* check loading of R7 is: 0x0F80 should: 0xf800: DONE */
138/* rlwinm r7, r4, 8, 16, 31
139 rlwinm r7, r4, 12, 16, 31 */ /* original */
140 rlwinm r7, r4, 16, 16, 31
141 /* -----------------------------------------------------*/
142 cmp cr0, r7, r6
143 beqlr
144
145 /* nope, have to move the registers */
146 lwbrx r6, r5, r3
147 andis. r6, r6, 0xffff
148 or r6, r6, r7
149 stwbrx r6, r5, r3
150
151 /* now, poll for the change */
1521: lwbrx r7, r5, r4
153 cmp cr0, r7, r6
154 bne 1b
155
156 lis r3, CFG_INT_SRAM_BASE@h
157 ori r3, r3, CFG_INT_SRAM_BASE@l
158 rlwinm r3, r3, 16, 16, 31
159 lis r4, CFG_GT_REGS@h
160 ori r4, r4, CFG_GT_REGS@l
161 li r5, INTEGRATED_SRAM_BASE_ADDR
162 stwbrx r3, r5, r4
163
1642: lwbrx r6, r5, r4
165 cmp cr0, r3, r6
166 bne 2b
167
168 /* done! */
169 blr
170#endif
171
172/* For use of the debug LEDs */
173 .global led_on0_relocated
174led_on0_relocated:
175 xor r21, r21, r21
176 xor r18, r18, r18
177 lis r18, 0xFC80
178 ori r18, r18, 0x8000
179/* stw r21, 0x0(r18) */
180 sync
181 blr
182
183 .global led_off0_relocated
184led_off0_relocated:
185 xor r21, r21, r21
186 xor r18, r18, r18
187 lis r18, 0xFC81
188 ori r18, r18, 0x4000
189/* stw r21, 0x0(r18) */
190 sync
191 blr
192
193 .global led_on0
194led_on0:
195 xor r18, r18, r18
196 lis r18, 0x1c80
197 ori r18, r18, 0x8000
198/* stw r18, 0x0(r18) */
199 sync
200 blr
201
202 .global led_off0
203led_off0:
204 xor r18, r18, r18
205 lis r18, 0x1c81
206 ori r18, r18, 0x4000
207/* stw r18, 0x0(r18) */
208 sync
209 blr
210
211 .global led_on1
212led_on1:
213 xor r18, r18, r18
214 lis r18, 0x1c80
215 ori r18, r18, 0xc000
216/* stw r18, 0x0(r18) */
217 sync
218 blr
219
220 .global led_off1
221led_off1:
222 xor r18, r18, r18
223 lis r18, 0x1c81
224 ori r18, r18, 0x8000
225/* stw r18, 0x0(r18) */
226 sync
227 blr
228
229 .global led_on2
230led_on2:
231 xor r18, r18, r18
232 lis r18, 0x1c81
233 ori r18, r18, 0x0000
234/* stw r18, 0x0(r18) */
235 sync
236 blr
237
238 .global led_off2
239led_off2:
240 xor r18, r18, r18
241 lis r18, 0x1c81
242 ori r18, r18, 0xc000
243/* stw r18, 0x0(r18) */
244 sync
245 blr