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gerrit.cesnet.cz / github / trini / u-boot / 4b11dba975268c5ee6fec588772562f3c5f162d6 / . / board / evb64260 / misc.S
blob: f09528d42958c429f7e77c33ce22266922386980 [file] [log] [blame]
wdenkefee1702002-07-20 20:14:13 +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 <galileo/gt64260R.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 */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]19 lis r11, CONFIG_SYS_GT_REGS@h
wdenkefee1702002-07-20 20:14:13 +0000[diff] [blame]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
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]32 * which happens to be TOP_OF_RAM - CONFIG_SYS_MONITOR_LEN */
wdenkefee1702002-07-20 20:14:13 +0000[diff] [blame]33
34 /* now that we're running from ram, init the rest of main memory
35 * for ECC use */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]36 lis r8, CONFIG_SYS_MONITOR_LEN@h
37 ori r8, r8, CONFIG_SYS_MONITOR_LEN@l
wdenkefee1702002-07-20 20:14:13 +0000[diff] [blame]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
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]123#ifdef CONFIG_SYS_BOARD_ASM_INIT
wdenkefee1702002-07-20 20:14:13 +0000[diff] [blame]124 /* NOTE: trashes r3-r7 */
125 .globl board_asm_init
126board_asm_init:
127 /* just move the GT registers to where they belong */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200[diff] [blame]128 lis r3, CONFIG_SYS_DFL_GT_REGS@h
129 ori r3, r3, CONFIG_SYS_DFL_GT_REGS@l
130 lis r4, CONFIG_SYS_GT_REGS@h
131 ori r4, r4, CONFIG_SYS_GT_REGS@l
wdenkefee1702002-07-20 20:14:13 +0000[diff] [blame]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 rlwinm r7, r4, 12, 16, 31
138 cmp cr0, r7, r6
139 beqlr
140
141 /* nope, have to move the registers */
142 lwbrx r6, r5, r3
143 andis. r6, r6, 0xffff
144 or r6, r6, r7
145 stwbrx r6, r5, r3
146
147 /* now, poll for the change */
1481: lwbrx r7, r5, r4
149 cmp cr0, r7, r6
150 bne 1b
151
152 /* done! */
153 blr
154#endif
155
156/* For use of the debug LEDs */
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]157 .global led_on0
wdenkefee1702002-07-20 20:14:13 +0000[diff] [blame]158led_on0:
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]159 xor r18, r18, r18
160 lis r18, 0x1c80
161 ori r18, r18, 0x8000
162 stw r18, 0x0(r18)
163 sync
164 blr
wdenkefee1702002-07-20 20:14:13 +0000[diff] [blame]165
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]166 .global led_on1
wdenkefee1702002-07-20 20:14:13 +0000[diff] [blame]167led_on1:
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]168 xor r18, r18, r18
169 lis r18, 0x1c80
170 ori r18, r18, 0xc000
171 stw r18, 0x0(r18)
172 sync
173 blr
wdenkefee1702002-07-20 20:14:13 +0000[diff] [blame]174
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]175 .global led_on2
wdenkefee1702002-07-20 20:14:13 +0000[diff] [blame]176led_on2:
wdenk8bde7f72003-06-27 21:31:46 +0000[diff] [blame]177 xor r18, r18, r18
178 lis r18, 0x1c81
179 ori r18, r18, 0x0000
180 stw r18, 0x0(r18)
181 sync
182 blr