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-rw-r--r--board/exbitgen/init.S296
1 files changed, 148 insertions, 148 deletions
diff --git a/board/exbitgen/init.S b/board/exbitgen/init.S
index 96b0aba..0e6cd04 100644
--- a/board/exbitgen/init.S
+++ b/board/exbitgen/init.S
@@ -34,7 +34,7 @@
#include <asm/mmu.h>
#include "exbitgen.h"
-
+
/* IIC declarations (This is an extract from 405gp_i2c.h, which also contains some */
/* c-code declarations and consequently can't be included here). */
/* (Possibly to be solved somehow else). */
@@ -100,25 +100,25 @@
#define TIMEBASE_10PS (1000000000 / CONFIG_SYS_CLK_FREQ) * 100
#define FLASH_8bit_AP 0x9B015480
-#define FLASH_8bit_CR 0xFFF18000 /* 1MB(min), 8bit, R/W */
+#define FLASH_8bit_CR 0xFFF18000 /* 1MB(min), 8bit, R/W */
#define FLASH_32bit_AP 0x9B015480
#define FLASH_32bit_CR 0xFFE3C000 /* 2MB, 32bit, R/W */
#define WDCR_EBC(reg,val) addi r4,0,reg;\
- mtdcr ebccfga,r4;\
- addis r4,0,val@h;\
- ori r4,r4,val@l;\
- mtdcr ebccfgd,r4
+ mtdcr ebccfga,r4;\
+ addis r4,0,val@h;\
+ ori r4,r4,val@l;\
+ mtdcr ebccfgd,r4
/*---------------------------------------------------------------------
* Function: ext_bus_cntlr_init
- * Description: Initializes the External Bus Controller for the external
- * peripherals. IMPORTANT: For pass1 this code must run from
+ * Description: Initializes the External Bus Controller for the external
+ * peripherals. IMPORTANT: For pass1 this code must run from
* cache since you can not reliably change a peripheral banks
* timing register (pbxap) while running code from that bank.
- * For ex., since we are running from ROM on bank 0, we can NOT
+ * For ex., since we are running from ROM on bank 0, we can NOT
* execute the code that modifies bank 0 timings from ROM, so
* we run it from cache.
* Bank 0 - Boot flash
@@ -126,63 +126,63 @@
* Bank 5 - CPLD
* Bank 6 - not used
* Bank 7 - Heathrow chip
- *---------------------------------------------------------------------
+ *---------------------------------------------------------------------
*/
- .globl ext_bus_cntlr_init
+ .globl ext_bus_cntlr_init
ext_bus_cntlr_init:
- mflr r4 /* save link register */
- bl ..getAddr
+ mflr r4 /* save link register */
+ bl ..getAddr
..getAddr:
- mflr r3 /* get address of ..getAddr */
- mtlr r4 /* restore link register */
- addi r4,0,14 /* set ctr to 10; used to prefetch */
- mtctr r4 /* 10 cache lines to fit this function */
- /* in cache (gives us 8x10=80 instrctns) */
+ mflr r3 /* get address of ..getAddr */
+ mtlr r4 /* restore link register */
+ addi r4,0,14 /* set ctr to 10; used to prefetch */
+ mtctr r4 /* 10 cache lines to fit this function */
+ /* in cache (gives us 8x10=80 instrctns) */
..ebcloop:
- icbt r0,r3 /* prefetch cache line for addr in r3 */
- addi r3,r3,32 /* move to next cache line */
- bdnz ..ebcloop /* continue for 10 cache lines */
+ icbt r0,r3 /* prefetch cache line for addr in r3 */
+ addi r3,r3,32 /* move to next cache line */
+ bdnz ..ebcloop /* continue for 10 cache lines */
mflr r31 /* save link register */
-
- /*-----------------------------------------------------------
- * Delay to ensure all accesses to ROM are complete before changing
+
+ /*-----------------------------------------------------------
+ * Delay to ensure all accesses to ROM are complete before changing
* bank 0 timings. 200usec should be enough.
- * 200,000,000 (cycles/sec) X .000200 (sec) = 0x9C40 cycles
- *-----------------------------------------------------------
+ * 200,000,000 (cycles/sec) X .000200 (sec) = 0x9C40 cycles
+ *-----------------------------------------------------------
*/
addis r3,0,0x0
- ori r3,r3,0xA000 /* ensure 200usec have passed since reset */
- mtctr r3
+ ori r3,r3,0xA000 /* ensure 200usec have passed since reset */
+ mtctr r3
..spinlp:
- bdnz ..spinlp /* spin loop */
+ bdnz ..spinlp /* spin loop */
- /*---------------------------------------------------------------
- * Memory Bank 0 (Boot Flash) initialization
- *---------------------------------------------------------------
+ /*---------------------------------------------------------------
+ * Memory Bank 0 (Boot Flash) initialization
+ *---------------------------------------------------------------
*/
WDCR_EBC(pb0ap, FLASH_32bit_AP)
WDCR_EBC(pb0cr, 0xffe38000)
/*pnc WDCR_EBC(pb0cr, FLASH_32bit_CR) */
-
- /*---------------------------------------------------------------
- * Memory Bank 5 (CPLD) initialization
- *---------------------------------------------------------------
+
+ /*---------------------------------------------------------------
+ * Memory Bank 5 (CPLD) initialization
+ *---------------------------------------------------------------
*/
WDCR_EBC(pb5ap, 0x01010040)
/*jsa recommendation: WDCR_EBC(pb5ap, 0x00010040) */
WDCR_EBC(pb5cr, 0x10038000)
- /*--------------------------------------------------------------- */
- /* Memory Bank 6 (not used) initialization */
- /*--------------------------------------------------------------- */
+ /*--------------------------------------------------------------- */
+ /* Memory Bank 6 (not used) initialization */
+ /*--------------------------------------------------------------- */
WDCR_EBC(pb6cr, 0x00000000)
/* Read HW ID to determine whether old H2 board or new generic CPU board */
addis r3, 0, HW_ID_ADDR@h
ori r3, r3, HW_ID_ADDR@l
- lbz r3,0x0000(r3)
+ lbz r3,0x0000(r3)
cmpi 0, r3, 1 /* if (HW_ID==1) */
beq setup_h2evalboard /* then jump */
cmpi 0, r3, 2 /* if (HW_ID==2) */
@@ -191,9 +191,9 @@ ext_bus_cntlr_init:
beq setup_genieboard /* then jump */
setup_genieboard:
- /*--------------------------------------------------------------- */
- /* Memory Bank 1 (Application Flash) initialization for generic CPU board */
- /*--------------------------------------------------------------- */
+ /*--------------------------------------------------------------- */
+ /* Memory Bank 1 (Application Flash) initialization for generic CPU board */
+ /*--------------------------------------------------------------- */
/* WDCR_EBC(pb1ap, 0x7b015480) /###* T.B.M. */
/* WDCR_EBC(pb1ap, 0x7F8FFE80) /###* T.B.M. */
WDCR_EBC(pb1ap, 0x9b015480) /* hlb-20020207: burst 8 bit 6 cycles */
@@ -201,68 +201,68 @@ setup_genieboard:
/* WDCR_EBC(pb1cr, 0x20098000) /###* 16 MB */
WDCR_EBC(pb1cr, 0x200B8000) /* 32 MB */
- /*--------------------------------------------------------------- */
- /* Memory Bank 4 (Onboard FPGA) initialization for generic CPU board */
- /*--------------------------------------------------------------- */
+ /*--------------------------------------------------------------- */
+ /* Memory Bank 4 (Onboard FPGA) initialization for generic CPU board */
+ /*--------------------------------------------------------------- */
WDCR_EBC(pb4ap, 0x01010000) /* */
WDCR_EBC(pb4cr, 0x1021c000) /* */
- /*--------------------------------------------------------------- */
- /* Memory Bank 7 (Heathrow chip on Reference board) initialization */
- /*--------------------------------------------------------------- */
+ /*--------------------------------------------------------------- */
+ /* Memory Bank 7 (Heathrow chip on Reference board) initialization */
+ /*--------------------------------------------------------------- */
WDCR_EBC(pb7ap, 0x200ffe80) /* No Ready, many wait states (let reflections die out) */
WDCR_EBC(pb7cr, 0X4001A000)
bl setup_continue
-
+
setup_h2evalboard:
- /*--------------------------------------------------------------- */
- /* Memory Bank 1 (Application Flash) initialization */
- /*--------------------------------------------------------------- */
+ /*--------------------------------------------------------------- */
+ /* Memory Bank 1 (Application Flash) initialization */
+ /*--------------------------------------------------------------- */
WDCR_EBC(pb1ap, 0x7b015480) /* T.B.M. */
/*3010 WDCR_EBC(pb1ap, 0x7F8FFE80) /###* T.B.M. */
- WDCR_EBC(pb1cr, 0x20058000)
+ WDCR_EBC(pb1cr, 0x20058000)
- /*--------------------------------------------------------------- */
- /* Memory Bank 2 (Application Flash) initialization */
- /*--------------------------------------------------------------- */
+ /*--------------------------------------------------------------- */
+ /* Memory Bank 2 (Application Flash) initialization */
+ /*--------------------------------------------------------------- */
WDCR_EBC(pb2ap, 0x7b015480) /* T.B.M. */
/*3010 WDCR_EBC(pb2ap, 0x7F8FFE80) /###* T.B.M. */
- WDCR_EBC(pb2cr, 0x20458000)
+ WDCR_EBC(pb2cr, 0x20458000)
/*--------------------------------------------------------------- */
- /* Memory Bank 3 (Application Flash) initialization */
- /*--------------------------------------------------------------- */
+ /* Memory Bank 3 (Application Flash) initialization */
+ /*--------------------------------------------------------------- */
WDCR_EBC(pb3ap, 0x7b015480) /* T.B.M. */
/*3010 WDCR_EBC(pb3ap, 0x7F8FFE80) /###* T.B.M. */
- WDCR_EBC(pb3cr, 0x20858000)
+ WDCR_EBC(pb3cr, 0x20858000)
- /*--------------------------------------------------------------- */
- /* Memory Bank 4 (Application Flash) initialization */
- /*--------------------------------------------------------------- */
+ /*--------------------------------------------------------------- */
+ /* Memory Bank 4 (Application Flash) initialization */
+ /*--------------------------------------------------------------- */
WDCR_EBC(pb4ap, 0x7b015480) /* T.B.M. */
/*3010 WDCR_EBC(pb4ap, 0x7F8FFE80) /###* T.B.M. */
WDCR_EBC(pb4cr, 0x20C58000)
- /*--------------------------------------------------------------- */
- /* Memory Bank 7 (Heathrow chip) initialization */
- /*--------------------------------------------------------------- */
+ /*--------------------------------------------------------------- */
+ /* Memory Bank 7 (Heathrow chip) initialization */
+ /*--------------------------------------------------------------- */
WDCR_EBC(pb7ap, 0x02000280) /* No Ready, 4 wait states */
WDCR_EBC(pb7cr, 0X4001A000)
setup_continue:
-
- mtlr r31 /* restore lr */
+
+ mtlr r31 /* restore lr */
nop /* pass2 DCR errata #8 */
- blr
+ blr
/*--------------------------------------------------------------------- */
/* Function: sdram_init */
/* Description: Configures SDRAM memory banks. */
/*--------------------------------------------------------------------- */
- .globl sdram_init
+ .globl sdram_init
sdram_init:
#if CFG_MONITOR_BASE < CFG_FLASH_BASE
@@ -377,12 +377,12 @@ sdram_init:
subf r5, r6, r17
or r4, r4, r5
- /*----------------------------------------------------------- */
- /* Set SDTR1 */
- /*----------------------------------------------------------- */
- addi r5,0,mem_sdtr1
- mtdcr memcfga,r5
- mtdcr memcfgd,r4
+ /*----------------------------------------------------------- */
+ /* Set SDTR1 */
+ /*----------------------------------------------------------- */
+ addi r5,0,mem_sdtr1
+ mtdcr memcfga,r5
+ mtdcr memcfgd,r4
/*----------------------------------------------------------- */
/* */
@@ -444,36 +444,36 @@ b1skip: addi r7,0,mem_mb2cf
addi r7,0,mem_mb3cf
mtdcr memcfga,r7
mtdcr memcfgd,r6
-b3skip:
+b3skip:
- /*----------------------------------------------------------- */
- /* Set RTR */
- /*----------------------------------------------------------- */
+ /*----------------------------------------------------------- */
+ /* Set RTR */
+ /*----------------------------------------------------------- */
cmpi 0, r30, 1600
bge rtr_1
- addis r7, 0, 0x05F0 /* RTR value for 100Mhz */
+ addis r7, 0, 0x05F0 /* RTR value for 100Mhz */
bl rtr_2
rtr_1: addis r7, 0, 0x03F8
rtr_2: addi r4,0,mem_rtr
mtdcr memcfga,r4
mtdcr memcfgd,r7
- /*----------------------------------------------------------- */
- /* Delay to ensure 200usec have elapsed since reset. Assume worst */
- /* case that the core is running 200Mhz: */
- /* 200,000,000 (cycles/sec) X .000200 (sec) = 0x9C40 cycles */
- /*----------------------------------------------------------- */
- addis r3,0,0x0000
- ori r3,r3,0xA000 /* ensure 200usec have passed since reset */
- mtctr r3
+ /*----------------------------------------------------------- */
+ /* Delay to ensure 200usec have elapsed since reset. Assume worst */
+ /* case that the core is running 200Mhz: */
+ /* 200,000,000 (cycles/sec) X .000200 (sec) = 0x9C40 cycles */
+ /*----------------------------------------------------------- */
+ addis r3,0,0x0000
+ ori r3,r3,0xA000 /* ensure 200usec have passed since reset */
+ mtctr r3
..spinlp2:
- bdnz ..spinlp2 /* spin loop */
+ bdnz ..spinlp2 /* spin loop */
- /*----------------------------------------------------------- */
- /* Set memory controller options reg, MCOPT1. */
+ /*----------------------------------------------------------- */
+ /* Set memory controller options reg, MCOPT1. */
/* Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst */
/* read/prefetch. */
- /*----------------------------------------------------------- */
+ /*----------------------------------------------------------- */
addi r4,0,mem_mcopt1
mtdcr memcfga,r4
addis r4,0,0x80C0 /* set DC_EN=1 */
@@ -481,13 +481,13 @@ rtr_2: addi r4,0,mem_rtr
mtdcr memcfgd,r4
- /*----------------------------------------------------------- */
- /* Delay to ensure 10msec have elapsed since reset. This is */
- /* required for the MPC952 to stabalize. Assume worst */
- /* case that the core is running 200Mhz: */
- /* 200,000,000 (cycles/sec) X .010 (sec) = 0x1E8480 cycles */
- /* This delay should occur before accessing SDRAM. */
- /*----------------------------------------------------------- */
+ /*----------------------------------------------------------- */
+ /* Delay to ensure 10msec have elapsed since reset. This is */
+ /* required for the MPC952 to stabalize. Assume worst */
+ /* case that the core is running 200Mhz: */
+ /* 200,000,000 (cycles/sec) X .010 (sec) = 0x1E8480 cycles */
+ /* This delay should occur before accessing SDRAM. */
+ /*----------------------------------------------------------- */
addis r3,0,0x001E
ori r3,r3,0x8480 /* ensure 10msec have passed since reset */
mtctr r3
@@ -501,8 +501,8 @@ rtr_2: addi r4,0,mem_rtr
stb r4,0(r5)
eieio
- mtlr r31 /* restore lr */
- blr
+ mtlr r31 /* restore lr */
+ blr
/*--------------------------------------------------------------------- */
/* Function: read_spd */
@@ -512,21 +512,21 @@ rtr_2: addi r4,0,mem_rtr
#define WRITE_I2C(reg,val) \
addi r3,0,val;\
- addis r4, 0, 0xef60;\
- ori r4, r4, 0x0500 + reg;\
- stb r3, 0(r4);\
- eieio
+ addis r4, 0, 0xef60;\
+ ori r4, r4, 0x0500 + reg;\
+ stb r3, 0(r4);\
+ eieio
#define READ_I2C(reg) \
- addis r3, 0, 0xef60;\
- ori r3, r3, 0x0500 + reg;\
- lbz r3, 0x0000(r3);\
- eieio
+ addis r3, 0, 0xef60;\
+ ori r3, r3, 0x0500 + reg;\
+ lbz r3, 0x0000(r3);\
+ eieio
read_spd:
mflr r5
-
+
/* Initialize i2c */
/*--------------- */
WRITE_I2C(IICLMADR, 0x00) /* clear lo master address */
@@ -558,9 +558,9 @@ read_spd:
/* Wait a little */
/*-------------- */
- addis r3,0,0x0000
- ori r3,r3,0xA000
- mtctr r3
+ addis r3,0,0x0000
+ ori r3,r3,0xA000
+ mtctr r3
in02: bdnz in02
/* Issue write command */
@@ -572,12 +572,12 @@ in02: bdnz in02
/*--------------- */
addi r7, 0, 0 /* byte counter in r7 */
addi r8, 0, 0 /* checksum in r8 */
-rdlp:
+rdlp:
/* issue read command */
/*------------------- */
cmpi 0, r7, 127
blt rd01
- WRITE_I2C(IICCNTL, IIC_CNTL_READ | IIC_CNTL_PT)
+ WRITE_I2C(IICCNTL, IIC_CNTL_READ | IIC_CNTL_PT)
bl rd02
rd01: WRITE_I2C(IICCNTL, IIC_CNTL_READ | IIC_CNTL_CHT | IIC_CNTL_PT)
rd02: bl wait_i2c_transfer_done
@@ -585,46 +585,46 @@ rd02: bl wait_i2c_transfer_done
/* Fetch byte from buffer */
/*----------------------- */
READ_I2C(IICMDBUF)
-
+
/* Retrieve parameters that are going to be used during configuration. */
/* Save them in dedicated registers. */
/*------------------------------------------------------------ */
cmpi 0, r7, 3 /* Save byte 3 in r10 */
bne rd10
- addi r10, r3, 0
+ addi r10, r3, 0
rd10: cmpi 0, r7, 4 /* Save byte 4 in r11 */
bne rd11
- addi r11, r3, 0
+ addi r11, r3, 0
rd11: cmpi 0, r7, 5 /* Save byte 5 in r12 */
bne rd12
- addi r12, r3, 0
+ addi r12, r3, 0
rd12: cmpi 0, r7, 17 /* Save byte 17 in r13 */
bne rd13
- addi r13, r3, 0
+ addi r13, r3, 0
rd13: cmpi 0, r7, 18 /* Save byte 18 in r14 */
bne rd14
- addi r14, r3, 0
+ addi r14, r3, 0
rd14: cmpi 0, r7, 31 /* Save byte 31 in r15 */
bne rd15
- addi r15, r3, 0
+ addi r15, r3, 0
rd15: cmpi 0, r7, 27 /* Save byte 27 in r16 */
bne rd16
- addi r16, r3, 0
+ addi r16, r3, 0
rd16: cmpi 0, r7, 29 /* Save byte 29 in r17 */
bne rd17
- addi r17, r3, 0
+ addi r17, r3, 0
rd17: cmpi 0, r7, 30 /* Save byte 30 in r18 */
bne rd18
- addi r18, r3, 0
+ addi r18, r3, 0
rd18: cmpi 0, r7, 9 /* Save byte 9 in r19 */
bne rd19
- addi r19, r3, 0
+ addi r19, r3, 0
rd19: cmpi 0, r7, 23 /* Save byte 23 in r20 */
bne rd20
- addi r20, r3, 0
+ addi r20, r3, 0
rd20: cmpi 0, r7, 25 /* Save byte 25 in r21 */
bne rd21
- addi r21, r3, 0
+ addi r21, r3, 0
rd21:
/* Calculate checksum of the first 63 bytes */
@@ -647,16 +647,16 @@ rd30: andi. r8, r8, 0xff /* use only 8 bits */
eieio
rderr: bl rderr
-rd31:
-
+rd31:
+
/* Increment byte counter and check whether all bytes have been read. */
/*------------------------------------------------------------------- */
addi r7, r7, 1
cmpi 0, r7, 127
bgt rd05
bl rdlp
-rd05:
- mtlr r5 /* restore lr */
+rd05:
+ mtlr r5 /* restore lr */
blr
wait_i2c_transfer_done:
@@ -664,8 +664,8 @@ wait_i2c_transfer_done:
wt01: READ_I2C(IICSTS)
andi. r4, r3, IIC_STS_PT
cmpi 0, r4, IIC_STS_PT
- beq wt01
- mtlr r6 /* restore lr */
+ beq wt01
+ mtlr r6 /* restore lr */
blr
/*--------------------------------------------------------------------- */
@@ -696,7 +696,7 @@ fm01: cmpi 0, r10, 11
cmpi 0, r13, 2
bne fm02
addi r3, 0, 1
- bl fmfound
+ bl fmfound
fm02: cmpi 0, r10, 12
bne fm03
@@ -815,7 +815,7 @@ fm14: cmpi 0, r10, 13
addi r3, 0, 7
bl fmfound
-fm15:
+fm15:
/* not found, error code to be issued on LEDs */
addi r7, 0, LED_SDRAM_CODE_2
addis r6, 0, 0x1000
@@ -827,7 +827,7 @@ fmerr: bl fmerr
fmfound:addi r6, 0, 1
subf r3, r6, r3
- mtlr r5 /* restore lr */
+ mtlr r5 /* restore lr */
blr
/*--------------------------------------------------------------------- */
@@ -838,13 +838,13 @@ fmfound:addi r6, 0, 1
find_size_code:
mflr r5
-
+
addi r3, r15, 0 /* density */
addi r7, 0, 0
fs01: andi. r6, r3, 0x01
cmpi 0, r6, 1
beq fs04
-
+
addi r7, r7, 1
cmpi 0, r7, 7
bge fs02
@@ -866,7 +866,7 @@ fs04: addi r3, r7, 0
addi r6, 0, 1
subf r3, r6, r3
fs05:
- mtlr r5 /* restore lr */
+ mtlr r5 /* restore lr */
blr
/*--------------------------------------------------------------------- */
@@ -895,9 +895,9 @@ fc01: srw r6, r14, r4 /* */
addi r7, r19, 0 /* SDRAM cycle time for highest CAS latenty */
bl fc03
-fc02:
+fc02:
addi r7, r20, 0 /* SDRAM cycle time for next-highest CAS latenty */
-fc03:
+fc03:
addi r8, r7, 0
addi r9, 0, 4
srw r7, r7, r9
@@ -910,7 +910,7 @@ fc03:
bgt fc05
addi r3, r2, 0
bl fc05
-fc04:
+fc04:
addi r7, r21, 0 /* SDRAM cycle time for third-highest CAS latenty */
addi r8, r7, 0
addi r9, 0, 2
@@ -933,9 +933,9 @@ fc06: addi r6, 0, 1
cmpi 0, r4, 0
bne fc01
-fc07:
+fc07:
- mtlr r5 /* restore lr */
+ mtlr r5 /* restore lr */
blr
#endif
@@ -1000,7 +1000,7 @@ fc07:
/* Size: 2 MB */
/* Usage: read/write */
/* Width: 32 bit */
-
+
/* Walnut fpga pb7ap */
/* 0 1 8 1 5 2 8 0 */
/* 0 + 00000 + 011 + 000 + 00 + 01 + 01 + 01 + 001 + 0 + 1 + 0 + 0 + 00000 */
generated by cgit v0.10.2 at 2024-11-05 07:28:18 (GMT)