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-rw-r--r--board/delta/lowlevel_init.S230
1 files changed, 115 insertions, 115 deletions
diff --git a/board/delta/lowlevel_init.S b/board/delta/lowlevel_init.S
index 66e7575..498cf7f 100644
--- a/board/delta/lowlevel_init.S
+++ b/board/delta/lowlevel_init.S
@@ -16,7 +16,7 @@
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
@@ -32,33 +32,33 @@
DRAM_SIZE: .long CFG_DRAM_SIZE
/* wait for coprocessor write complete */
- .macro CPWAIT reg
- mrc p15,0,\reg,c2,c0,0
- mov \reg,\reg
- sub pc,pc,#4
- .endm
+.macro CPWAIT reg
+ mrc p15,0,\reg,c2,c0,0
+ mov \reg,\reg
+ sub pc,pc,#4
+.endm
.macro wait time
- ldr r2, =OSCR
- mov r3, #0
- str r3, [r2]
+ ldr r2, =OSCR
+ mov r3, #0
+ str r3, [r2]
0:
- ldr r3, [r2]
- cmp r3, \time
- bls 0b
+ ldr r3, [r2]
+ cmp r3, \time
+ bls 0b
.endm
/*
- * Memory setup
+ * Memory setup
*/
.globl lowlevel_init
lowlevel_init:
/* Set up GPIO pins first ----------------------------------------- */
- mov r10, lr
-
- /* Configure GPIO Pins 97, 98 UART1 / altern. Fkt. 1 */
+ mov r10, lr
+
+ /* Configure GPIO Pins 97, 98 UART1 / altern. Fkt. 1 */
ldr r0, =GPIO97
ldr r1, =0x801
str r1, [r0]
@@ -66,24 +66,24 @@ lowlevel_init:
ldr r0, =GPIO98
ldr r1, =0x801
str r1, [r0]
-
- /* tebrandt - ASCR, clear the RDH bit */
- ldr r0, =ASCR
- ldr r1, [r0]
- bic r1, r1, #0x80000000
- str r1, [r0]
-
+
+ /* tebrandt - ASCR, clear the RDH bit */
+ ldr r0, =ASCR
+ ldr r1, [r0]
+ bic r1, r1, #0x80000000
+ str r1, [r0]
+
/* ---------------------------------------------------------------- */
- /* Enable memory interface */
+ /* Enable memory interface */
/* ---------------------------------------------------------------- */
/* ---------------------------------------------------------------- */
- /* Step 1: Wait for at least 200 microsedonds to allow internal */
- /* clocks to settle. Only necessary after hard reset... */
- /* FIXME: can be optimized later */
+ /* Step 1: Wait for at least 200 microsedonds to allow internal */
+ /* clocks to settle. Only necessary after hard reset... */
+ /* FIXME: can be optimized later */
/* ---------------------------------------------------------------- */
-; wait #300
-
+; wait #300
+
mem_init:
#define NEW_SDRAM_INIT 1
@@ -99,11 +99,11 @@ mem_init:
/* 2. Programm MDCNFG, leaving DMCEN de-asserted */
ldr r0, =MDCNFG
ldr r1, =(MDCNFG_DMAP | MDCNFG_DTYPE | MDCNFG_DTC_2 | MDCNFG_DCSE0 | MDCNFG_DRAC_13)
- /* ldr r1, =0x80000403 */
+ /* ldr r1, =0x80000403 */
str r1, [r0]
ldr r1, [r0] /* delay until written */
- /* 3. wait nop power up waiting period (200ms)
+ /* 3. wait nop power up waiting period (200ms)
* optimization: Steps 4+6 can be done during this
*/
wait #300
@@ -127,7 +127,7 @@ mem_init:
ldr r1, =0x60000033
str r1, [r0]
wait #300
-
+
/* Configure MDREFR */
ldr r0, =MDREFR
ldr r1, =0x00000006
@@ -142,48 +142,48 @@ mem_init:
#else /* NEW_SDRAM_INIT */
-
+
/* configure the MEMCLKCFG register */
- ldr r1, =MEMCLKCFG
- ldr r2, =0x00010001
- str r2, [r1] @ WRITE
- ldr r2, [r1] @ DELAY UNTIL WRITTEN
-
+ ldr r1, =MEMCLKCFG
+ ldr r2, =0x00010001
+ str r2, [r1] @ WRITE
+ ldr r2, [r1] @ DELAY UNTIL WRITTEN
+
/* set CSADRCFG[0] to data flash SRAM mode */
- ldr r1, =CSADRCFG0
- ldr r2, =0x00320809
- str r2, [r1] @ WRITE
- ldr r2, [r1] @ DELAY UNTIL WRITTEN
-
+ ldr r1, =CSADRCFG0
+ ldr r2, =0x00320809
+ str r2, [r1] @ WRITE
+ ldr r2, [r1] @ DELAY UNTIL WRITTEN
+
/* set CSADRCFG[1] to data flash SRAM mode */
- ldr r1, =CSADRCFG1
- ldr r2, =0x00320809
- str r2, [r1] @ WRITE
- ldr r2, [r1] @ DELAY UNTIL WRITTEN
-
+ ldr r1, =CSADRCFG1
+ ldr r2, =0x00320809
+ str r2, [r1] @ WRITE
+ ldr r2, [r1] @ DELAY UNTIL WRITTEN
+
/* set MSC 0 register for SRAM memory */
- ldr r1, =MSC0
- ldr r2, =0x11191119
- str r2, [r1] @ WRITE
- ldr r2, [r1] @ DELAY UNTIL WRITTEN
-
+ ldr r1, =MSC0
+ ldr r2, =0x11191119
+ str r2, [r1] @ WRITE
+ ldr r2, [r1] @ DELAY UNTIL WRITTEN
+
/* set CSADRCFG[2] to data flash SRAM mode */
- ldr r1, =CSADRCFG2
- ldr r2, =0x00320809
- str r2, [r1] @ WRITE
- ldr r2, [r1] @ DELAY UNTIL WRITTEN
-
+ ldr r1, =CSADRCFG2
+ ldr r2, =0x00320809
+ str r2, [r1] @ WRITE
+ ldr r2, [r1] @ DELAY UNTIL WRITTEN
+
/* set CSADRCFG[3] to VLIO mode */
- ldr r1, =CSADRCFG3
- ldr r2, =0x0032080B
- str r2, [r1] @ WRITE
- ldr r2, [r1] @ DELAY UNTIL WRITTEN
+ ldr r1, =CSADRCFG3
+ ldr r2, =0x0032080B
+ str r2, [r1] @ WRITE
+ ldr r2, [r1] @ DELAY UNTIL WRITTEN
/* set MSC 1 register for VLIO memory */
- ldr r1, =MSC1
- ldr r2, =0x123C1119
- str r2, [r1] @ WRITE
- ldr r2, [r1] @ DELAY UNTIL WRITTEN
+ ldr r1, =MSC1
+ ldr r2, =0x123C1119
+ str r2, [r1] @ WRITE
+ ldr r2, [r1] @ DELAY UNTIL WRITTEN
#if 0
/* This does not work in Zylonite. -SC */
@@ -240,11 +240,11 @@ mem_init:
ldr r2, [r1]
/* Hardware DDR Read-Strobe Delay Calibration */
- ldr r0, =DDR_HCAL @ DDR_HCAL
- ldr r1, =0x803ffc07 @ the offset is correct? -SC
- str r1, [r0]
+ ldr r0, =DDR_HCAL @ DDR_HCAL
+ ldr r1, =0x803ffc07 @ the offset is correct? -SC
+ str r1, [r0]
wait #5
- ldr r1, [r0]
+ ldr r1, [r0]
/* Here we assume the hardware calibration alwasy be successful. -SC */
/* Set DMCEN bit in MDCNFG Register */
@@ -254,20 +254,20 @@ mem_init:
str r1, [r0]
#endif /* NEW_SDRAM_INIT */
-
+
#ifndef CFG_SKIP_DRAM_SCRUB
/* scrub/init SDRAM if enabled/present */
ldr r8, =CFG_DRAM_BASE /* base address of SDRAM (CFG_DRAM_BASE) */
ldr r9, =CFG_DRAM_SIZE /* size of memory to scrub (CFG_DRAM_SIZE) */
mov r0, #0 /* scrub with 0x0000:0000 */
mov r1, #0
- mov r2, #0
+ mov r2, #0
mov r3, #0
- mov r4, #0
+ mov r4, #0
mov r5, #0
- mov r6, #0
+ mov r6, #0
mov r7, #0
-10: /* fastScrubLoop */
+10: /* fastScrubLoop */
subs r9, r9, #32 /* 8 words/line */
stmia r8!, {r0-r7}
beq 15f
@@ -281,25 +281,25 @@ mem_init:
/* Disable software and data breakpoints */
mov r0, #0
- mcr p15,0,r0,c14,c8,0 // ibcr0
- mcr p15,0,r0,c14,c9,0 // ibcr1
- mcr p15,0,r0,c14,c4,0 // dbcon
+ mcr p15,0,r0,c14,c8,0 /* ibcr0 */
+ mcr p15,0,r0,c14,c9,0 /* ibcr1 */
+ mcr p15,0,r0,c14,c4,0 /* dbcon */
/* Enable all debug functionality */
mov r0,#0x80000000
- mcr p14,0,r0,c10,c0,0 // dcsr
+ mcr p14,0,r0,c10,c0,0 /* dcsr */
endlowlevel_init:
- mov pc, lr
+ mov pc, lr
/*
@********************************************************************************
@ DDR calibration
-@
+@
@ This function is used to calibrate DQS delay lines.
-@ Monahans supports three ways to do it. One is software
+@ Monahans supports three ways to do it. One is software
@ calibration. Two is hardware calibration. Three is hybrid
@ calibration.
@
@@ -308,15 +308,15 @@ endlowlevel_init:
ddr_calibration:
@ Case 1: Write the correct delay value once
- @ Configure DDR_SCAL Register
- ldr r0, =DDR_SCAL @ DDR_SCAL
-q ldr r1, =0xaf2f2f2f
- str r1, [r0]
- ldr r1, [r0]
+ @ Configure DDR_SCAL Register
+ ldr r0, =DDR_SCAL @ DDR_SCAL
+q ldr r1, =0xaf2f2f2f
+ str r1, [r0]
+ ldr r1, [r0]
*/
/* @ Case 2: Software Calibration
@ Write test pattern to memory
- ldr r5, =0x0faf0faf @ Data Pattern
+ ldr r5, =0x0faf0faf @ Data Pattern
ldr r4, =0xa0000000 @ DDR ram
str r5, [r4]
@@ -328,11 +328,11 @@ ddr_loop1:
cmp r1, =0xf
ble end_loop
mov r3, r1
- mov r0, r1, lsl #30
+ mov r0, r1, lsl #30
orr r3, r3, r0
- mov r0, r1, lsl #22
+ mov r0, r1, lsl #22
orr r3, r3, r0
- mov r0, r1, lsl #14
+ mov r0, r1, lsl #14
orr r3, r3, r0
orr r3, r3, =0x80000000
ldr r2, =DDR_SCAL
@@ -346,16 +346,16 @@ ddr_loop2:
add r1, r1, =0x1
cmp r1, =0xf
ble end_loop
- mov r3, r1
- mov r0, r1, lsl #30
- orr r3, r3, r0
- mov r0, r1, lsl #22
- orr r3, r3, r0
- mov r0, r1, lsl #14
- orr r3, r3, r0
- orr r3, r3, =0x80000000
- ldr r2, =DDR_SCAL
- str r3, [r2]
+ mov r3, r1
+ mov r0, r1, lsl #30
+ orr r3, r3, r0
+ mov r0, r1, lsl #22
+ orr r3, r3, r0
+ mov r0, r1, lsl #14
+ orr r3, r3, r0
+ orr r3, r3, =0x80000000
+ ldr r2, =DDR_SCAL
+ str r3, [r2]
ldr r2, [r4]
cmp r2, r5
@@ -364,22 +364,22 @@ ddr_loop2:
add r3, r6, r7
lsr r3, r3, =0x1
- mov r0, r1, lsl #30
- orr r3, r3, r0
- mov r0, r1, lsl #22
- orr r3, r3, r0
- mov r0, r1, lsl #14
- orr r3, r3, r0
- orr r3, r3, =0x80000000
- ldr r2, =DDR_SCAL
-
+ mov r0, r1, lsl #30
+ orr r3, r3, r0
+ mov r0, r1, lsl #22
+ orr r3, r3, r0
+ mov r0, r1, lsl #14
+ orr r3, r3, r0
+ orr r3, r3, =0x80000000
+ ldr r2, =DDR_SCAL
+
end_loop:
@ Case 3: Hardware Calibratoin
- ldr r0, =DDR_HCAL @ DDR_HCAL
- ldr r1, =0x803ffc07 @ the offset is correct? -SC
- str r1, [r0]
+ ldr r0, =DDR_HCAL @ DDR_HCAL
+ ldr r1, =0x803ffc07 @ the offset is correct? -SC
+ str r1, [r0]
wait #5
- ldr r1, [r0]
- mov pc, lr
+ ldr r1, [r0]
+ mov pc, lr
*/
generated by cgit v1.1 at 2024-11-23 11:10:07 +0000