diff options
Diffstat (limited to 'board/exbitgen/init.S')
| -rw-r--r-- | board/exbitgen/init.S | 1009 |
1 files changed, 0 insertions, 1009 deletions
diff --git a/board/exbitgen/init.S b/board/exbitgen/init.S deleted file mode 100644 index 0e6cd04ba8..0000000000 --- a/board/exbitgen/init.S +++ /dev/null @@ -1,1009 +0,0 @@ -/*----------------------------------------------------------------------+ - * - * This source code has been made available to you by IBM on an AS-IS - * basis. Anyone receiving this source is licensed under IBM - * copyrights to use it in any way he or she deems fit, including - * copying it, modifying it, compiling it, and redistributing it either - * with or without modifications. No license under IBM patents or - * patent applications is to be implied by the copyright license. - * - * Any user of this software should understand that IBM cannot provide - * technical support for this software and will not be responsible for - * any consequences resulting from the use of this software. - * - * Any person who transfers this source code or any derivative work - * must include the IBM copyright notice, this paragraph, and the - * preceding two paragraphs in the transferred software. - * - * COPYRIGHT I B M CORPORATION 1995 - * LICENSED MATERIAL - PROGRAM PROPERTY OF I B M - *----------------------------------------------------------------------- - */ - -#include <config.h> -#include <ppc4xx.h> -#include "config.h" - -#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */ -#define FPGA_BRDC 0xF0300004 - -#include <ppc_asm.tmpl> -#include <ppc_defs.h> - -#include <asm/cache.h> -#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). */ -/*--------------------------------------------------------------------- */ -#define I2C_REGISTERS_BASE_ADDRESS 0xEF600500 -#define IIC_MDBUF (I2C_REGISTERS_BASE_ADDRESS+IICMDBUF) -#define IIC_SDBUF (I2C_REGISTERS_BASE_ADDRESS+IICSDBUF) -#define IIC_LMADR (I2C_REGISTERS_BASE_ADDRESS+IICLMADR) -#define IIC_HMADR (I2C_REGISTERS_BASE_ADDRESS+IICHMADR) -#define IIC_CNTL (I2C_REGISTERS_BASE_ADDRESS+IICCNTL) -#define IIC_MDCNTL (I2C_REGISTERS_BASE_ADDRESS+IICMDCNTL) -#define IIC_STS (I2C_REGISTERS_BASE_ADDRESS+IICSTS) -#define IIC_EXTSTS (I2C_REGISTERS_BASE_ADDRESS+IICEXTSTS) -#define IIC_LSADR (I2C_REGISTERS_BASE_ADDRESS+IICLSADR) -#define IIC_HSADR (I2C_REGISTERS_BASE_ADDRESS+IICHSADR) -#define IIC_CLKDIV (I2C_REGISTERS_BASE_ADDRESS+IICCLKDIV) -#define IIC_INTRMSK (I2C_REGISTERS_BASE_ADDRESS+IICINTRMSK) -#define IIC_XFRCNT (I2C_REGISTERS_BASE_ADDRESS+IICXFRCNT) -#define IIC_XTCNTLSS (I2C_REGISTERS_BASE_ADDRESS+IICXTCNTLSS) -#define IIC_DIRECTCNTL (I2C_REGISTERS_BASE_ADDRESS+IICDIRECTCNTL) - -/* MDCNTL Register Bit definition */ -#define IIC_MDCNTL_HSCL 0x01 -#define IIC_MDCNTL_EUBS 0x02 -#define IIC_MDCNTL_FMDB 0x40 -#define IIC_MDCNTL_FSDB 0x80 - -/* CNTL Register Bit definition */ -#define IIC_CNTL_PT 0x01 -#define IIC_CNTL_READ 0x02 -#define IIC_CNTL_CHT 0x04 - -/* STS Register Bit definition */ -#define IIC_STS_PT 0X01 -#define IIC_STS_ERR 0X04 -#define IIC_STS_MDBS 0X20 - -/* EXTSTS Register Bit definition */ -#define IIC_EXTSTS_XFRA 0X01 -#define IIC_EXTSTS_ICT 0X02 -#define IIC_EXTSTS_LA 0X04 - -/* LED codes used for inditing progress and errors during read of DIMM SPD. */ -/*--------------------------------------------------------------------- */ -#define LED_SDRAM_CODE_1 0xef -#define LED_SDRAM_CODE_2 0xee -#define LED_SDRAM_CODE_3 0xed -#define LED_SDRAM_CODE_4 0xec -#define LED_SDRAM_CODE_5 0xeb -#define LED_SDRAM_CODE_6 0xea -#define LED_SDRAM_CODE_7 0xe9 -#define LED_SDRAM_CODE_8 0xe8 -#define LED_SDRAM_CODE_9 0xe7 -#define LED_SDRAM_CODE_10 0xe6 -#define LED_SDRAM_CODE_11 0xe5 -#define LED_SDRAM_CODE_12 0xe4 -#define LED_SDRAM_CODE_13 0xe3 -#define LED_SDRAM_CODE_14 0xe2 -#define LED_SDRAM_CODE_15 0xe1 -#define LED_SDRAM_CODE_16 0xe0 - - -#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_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 - -/*--------------------------------------------------------------------- - * Function: ext_bus_cntlr_init - * 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 - * execute the code that modifies bank 0 timings from ROM, so - * we run it from cache. - * Bank 0 - Boot flash - * Bank 1-4 - application flash - * Bank 5 - CPLD - * Bank 6 - not used - * Bank 7 - Heathrow chip - *--------------------------------------------------------------------- - */ - .globl ext_bus_cntlr_init -ext_bus_cntlr_init: - 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) */ -..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 */ - - mflr r31 /* save link register */ - - /*----------------------------------------------------------- - * 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 - *----------------------------------------------------------- - */ - - addis r3,0,0x0 - ori r3,r3,0xA000 /* ensure 200usec have passed since reset */ - mtctr r3 -..spinlp: - bdnz ..spinlp /* spin loop */ - - /*--------------------------------------------------------------- - * 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 - *--------------------------------------------------------------- - */ - WDCR_EBC(pb5ap, 0x01010040) -/*jsa recommendation: WDCR_EBC(pb5ap, 0x00010040) */ - WDCR_EBC(pb5cr, 0x10038000) - - /*--------------------------------------------------------------- */ - /* 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) - cmpi 0, r3, 1 /* if (HW_ID==1) */ - beq setup_h2evalboard /* then jump */ - cmpi 0, r3, 2 /* if (HW_ID==2) */ - beq setup_genieboard /* then jump */ - cmpi 0, r3, 3 /* if (HW_ID==3) */ - beq setup_genieboard /* then jump */ - -setup_genieboard: - /*--------------------------------------------------------------- */ - /* 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 */ - -/* WDCR_EBC(pb1cr, 0x20098000) /###* 16 MB */ - WDCR_EBC(pb1cr, 0x200B8000) /* 32 MB */ - - /*--------------------------------------------------------------- */ - /* 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 */ - /*--------------------------------------------------------------- */ - 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 */ - /*--------------------------------------------------------------- */ - WDCR_EBC(pb1ap, 0x7b015480) /* T.B.M. */ -/*3010 WDCR_EBC(pb1ap, 0x7F8FFE80) /###* T.B.M. */ - WDCR_EBC(pb1cr, 0x20058000) - - /*--------------------------------------------------------------- */ - /* 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) - - /*--------------------------------------------------------------- */ - /* 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) - - /*--------------------------------------------------------------- */ - /* 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 */ - /*--------------------------------------------------------------- */ - WDCR_EBC(pb7ap, 0x02000280) /* No Ready, 4 wait states */ - WDCR_EBC(pb7cr, 0X4001A000) - -setup_continue: - - - mtlr r31 /* restore lr */ - nop /* pass2 DCR errata #8 */ - blr - -/*--------------------------------------------------------------------- */ -/* Function: sdram_init */ -/* Description: Configures SDRAM memory banks. */ -/*--------------------------------------------------------------------- */ - .globl sdram_init - -sdram_init: -#if CFG_MONITOR_BASE < CFG_FLASH_BASE - blr -#else - mflr r31 - - /* output SDRAM code on LEDs */ - addi r4, 0, LED_SDRAM_CODE_1 - addis r5, 0, 0x1000 - ori r5, r5, 0x0001 - stb r4,0(r5) - eieio - - /* Read contents of spd */ - /*--------------------- */ - bl read_spd - - /*----------------------------------------------------------- */ - /* */ - /* */ - /* Update SDRAM timing register */ - /* */ - /* */ - /*----------------------------------------------------------- */ - - /* Read PLL feedback divider and calculate clock period of local bus in */ - /* granularity of 10 ps. Save clock period in r30 */ - /*-------------------------------------------------------------- */ - mfdcr r4, pllmd - addi r9, 0, 25 - srw r4, r4, r9 - andi. r4, r4, 0x07 - addis r5, 0, TIMEBASE_10PS@h - ori r5, r5, TIMEBASE_10PS@l - divwu r30, r5, r4 - - /* Determine CASL */ - /*--------------- */ - bl find_casl /* Returns CASL in r3 */ - - /* Calc trp_clocks = (trp * 100 + (clk - 1)) / clk */ - /* (trp read from byte 27 in granularity of 1 ns) */ - /*------------------------------------------------ */ - mulli r16, r16, 100 - add r16, r16, r30 - addi r6, 0, 1 - subf r16, r6, r16 - divwu r16, r16, r30 - - /* Calc trcd_clocks = (trcd * 100 + (clk - 1) ) / clk */ - /* (trcd read from byte 29 in granularity of 1 ns) */ - /*--------------------------------------------------- */ - mulli r17, r17, 100 - add r17, r17, r30 - addi r6, 0, 1 - subf r17, r6, r17 - divwu r17, r17, r30 - - /* Calc tras_clocks = (tras * 100 + (clk - 1) ) / clk */ - /* (tras read from byte 30 in granularity of 1 ns) */ - /*--------------------------------------------------- */ - mulli r18, r18, 100 - add r18, r18, r30 - addi r6, 0, 1 - subf r18, r6, r18 - divwu r18, r18, r30 - - /* Calc trc_clocks = trp_clocks + tras_clocks */ - /*------------------------------------------- */ - add r18, r18, r16 - - /* CASL value */ - /*----------- */ - addi r9, 0, 23 - slw r4, r3, r9 - - /* PTA = trp_clocks - 1 */ - /*--------------------- */ - addi r6, 0, 1 - subf r5, r6, r16 - addi r9, 0, 18 - slw r5, r5, r9 - or r4, r4, r5 - - /* CTP = trc_clocks - trp_clocks - trcd_clocks - 1 */ - /*------------------------------------------------ */ - addi r5, r18, 0 - subf r5, r16, r5 - subf r5, r17, r5 - addi r6, 0, 1 - subf r5, r6, r5 - addi r9, 0, 16 - slw r5, r5, r9 - or r4, r4, r5 - - /* LDF = 1 */ - /*-------- */ - ori r4, r4, 0x4000 - - /* RFTA = trc_clocks - 4 */ - /*---------------------- */ - addi r6, 0, 4 - subf r5, r6, r18 - addi r9, 0, 2 - slw r5, r5, r9 - or r4, r4, r5 - - /* RCD = trcd_clocks - 1 */ - /*---------------------- */ - addi r6, 0, 1 - subf r5, r6, r17 - or r4, r4, r5 - - /*----------------------------------------------------------- */ - /* Set SDTR1 */ - /*----------------------------------------------------------- */ - addi r5,0,mem_sdtr1 - mtdcr memcfga,r5 - mtdcr memcfgd,r4 - - /*----------------------------------------------------------- */ - /* */ - /* */ - /* Update memory bank 0-3 configuration registers */ - /* */ - /* */ - /*----------------------------------------------------------- */ - - /* Build contents of configuration register for bank 0 into r6 */ - /*------------------------------------------------------------ */ - bl find_mode /* returns addressing mode in r3 */ - addi r29, r3, 0 /* save mode temporarily in r29 */ - bl find_size_code /* returns size code in r3 */ - addi r9, 0, 17 /* bit offset of size code in configuration register */ - slw r3, r3, r9 /* */ - addi r9, 0, 13 /* bit offset of addressing mode in configuration register */ - slw r29, r29, r9 /* */ - or r3, r29, r3 /* merge size code and addressing mode */ - ori r6, r3, CFG_SDRAM_BASE + 1 /* insert base address and enable bank */ - - /* Calculate banksize r15 = (density << 22) / 2 */ - /*--------------------------------------------- */ - addi r9, 0, 21 - slw r15, r15, r9 - - /* Set SDRAM bank 0 register and adjust r6 for next bank */ - /*------------------------------------------------------ */ - addi r7,0,mem_mb0cf - mtdcr memcfga,r7 - mtdcr memcfgd,r6 - - add r6, r6, r15 /* add bank size to base address for next bank */ - - /* If two rows/banks then set SDRAM bank 1 register and adjust r6 for next bank */ - /*---------------------------------------------------------------------------- */ - cmpi 0, r12, 2 - bne b1skip - - addi r7,0,mem_mb1cf - mtdcr memcfga,r7 - mtdcr memcfgd,r6 - - add r6, r6, r15 /* add bank size to base address for next bank */ - - /* Set SDRAM bank 2 register and adjust r6 for next bank */ - /*------------------------------------------------------ */ -b1skip: addi r7,0,mem_mb2cf - mtdcr memcfga,r7 - mtdcr memcfgd,r6 - - add r6, r6, r15 /* add bank size to base address for next bank */ - - /* If two rows/banks then set SDRAM bank 3 register */ - /*------------------------------------------------ */ - cmpi 0, r12, 2 - bne b3skip - - addi r7,0,mem_mb3cf - mtdcr memcfga,r7 - mtdcr memcfgd,r6 -b3skip: - - /*----------------------------------------------------------- */ - /* Set RTR */ - /*----------------------------------------------------------- */ - cmpi 0, r30, 1600 - bge rtr_1 - 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 -..spinlp2: - bdnz ..spinlp2 /* spin loop */ - - /*----------------------------------------------------------- */ - /* 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 */ - ori r4,r4,0x0000 - 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. */ - /*----------------------------------------------------------- */ - addis r3,0,0x001E - ori r3,r3,0x8480 /* ensure 10msec have passed since reset */ - mtctr r3 -..spinlp3: - bdnz ..spinlp3 /* spin loop */ - - /* output SDRAM code on LEDs */ - addi r4, 0, LED_SDRAM_CODE_16 - addis r5, 0, 0x1000 - ori r5, r5, 0x0001 - stb r4,0(r5) - eieio - - mtlr r31 /* restore lr */ - blr - -/*--------------------------------------------------------------------- */ -/* Function: read_spd */ -/* Description: Reads contents of SPD and saves parameters to be used for */ -/* configuration in dedicated registers (see code below). */ -/*--------------------------------------------------------------------- */ - -#define WRITE_I2C(reg,val) \ - addi r3,0,val;\ - 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 - -read_spd: - - mflr r5 - - /* Initialize i2c */ - /*--------------- */ - WRITE_I2C(IICLMADR, 0x00) /* clear lo master address */ - WRITE_I2C(IICHMADR, 0x00) /* clear hi master address */ - WRITE_I2C(IICLSADR, 0x00) /* clear lo slave address */ - WRITE_I2C(IICHSADR, 0x00) /* clear hi slave address */ - WRITE_I2C(IICSTS, 0x08) /* update status register */ - WRITE_I2C(IICEXTSTS, 0x8f) - WRITE_I2C(IICCLKDIV, 0x05) - WRITE_I2C(IICINTRMSK, 0x00) /* no interrupts */ - WRITE_I2C(IICXFRCNT, 0x00) /* clear transfer count */ - WRITE_I2C(IICXTCNTLSS, 0xf0) /* clear extended control & stat */ - WRITE_I2C(IICMDCNTL, IIC_MDCNTL_FSDB | IIC_MDCNTL_FMDB) /* mode control */ - READ_I2C(IICMDCNTL) - ori r3, r3, IIC_MDCNTL_EUBS | IIC_MDCNTL_HSCL - WRITE_I2C(IICMDCNTL, r3) /* mode control */ - WRITE_I2C(IICCNTL, 0x00) /* clear control reg */ - - /* Wait until initialization completed */ - /*------------------------------------ */ - bl wait_i2c_transfer_done - - WRITE_I2C(IICHMADR, 0x00) /* 7-bit addressing */ - WRITE_I2C(IICLMADR, SDRAM_SPD_WRITE_ADDRESS) - - /* Write 0 into buffer(start address) */ - /*----------------------------------- */ - WRITE_I2C(IICMDBUF, 0x00); - - /* Wait a little */ - /*-------------- */ - addis r3,0,0x0000 - ori r3,r3,0xA000 - mtctr r3 -in02: bdnz in02 - - /* Issue write command */ - /*-------------------- */ - WRITE_I2C(IICCNTL, IIC_CNTL_PT) - bl wait_i2c_transfer_done - - /* Read 128 bytes */ - /*--------------- */ - addi r7, 0, 0 /* byte counter in r7 */ - addi r8, 0, 0 /* checksum in r8 */ -rdlp: - /* issue read command */ - /*------------------- */ - cmpi 0, r7, 127 - blt rd01 - 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 - - /* 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 -rd10: cmpi 0, r7, 4 /* Save byte 4 in r11 */ - bne rd11 - addi r11, r3, 0 -rd11: cmpi 0, r7, 5 /* Save byte 5 in r12 */ - bne rd12 - addi r12, r3, 0 -rd12: cmpi 0, r7, 17 /* Save byte 17 in r13 */ - bne rd13 - addi r13, r3, 0 -rd13: cmpi 0, r7, 18 /* Save byte 18 in r14 */ - bne rd14 - addi r14, r3, 0 -rd14: cmpi 0, r7, 31 /* Save byte 31 in r15 */ - bne rd15 - addi r15, r3, 0 -rd15: cmpi 0, r7, 27 /* Save byte 27 in r16 */ - bne rd16 - addi r16, r3, 0 -rd16: cmpi 0, r7, 29 /* Save byte 29 in r17 */ - bne rd17 - addi r17, r3, 0 -rd17: cmpi 0, r7, 30 /* Save byte 30 in r18 */ - bne rd18 - addi r18, r3, 0 -rd18: cmpi 0, r7, 9 /* Save byte 9 in r19 */ - bne rd19 - addi r19, r3, 0 -rd19: cmpi 0, r7, 23 /* Save byte 23 in r20 */ - bne rd20 - addi r20, r3, 0 -rd20: cmpi 0, r7, 25 /* Save byte 25 in r21 */ - bne rd21 - addi r21, r3, 0 -rd21: - - /* Calculate checksum of the first 63 bytes */ - /*----------------------------------------- */ - cmpi 0, r7, 63 - bgt rd31 - beq rd30 - add r8, r8, r3 - bl rd31 - - /* Verify checksum at byte 63 */ - /*--------------------------- */ -rd30: andi. r8, r8, 0xff /* use only 8 bits */ - cmp 0, r8, r3 - beq rd31 - addi r4, 0, LED_SDRAM_CODE_8 - addis r5, 0, 0x1000 - ori r5, r5, 0x0001 - stb r4,0(r5) - eieio -rderr: bl rderr - -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 */ - blr - -wait_i2c_transfer_done: - mflr r6 -wt01: READ_I2C(IICSTS) - andi. r4, r3, IIC_STS_PT - cmpi 0, r4, IIC_STS_PT - beq wt01 - mtlr r6 /* restore lr */ - blr - -/*--------------------------------------------------------------------- */ -/* Function: find_mode */ -/* Description: Determines addressing mode to be used dependent on */ -/* number of rows (r10 = byte 3 from SPD), number of columns (r11 = */ -/* byte 4 from SPD) and number of banks (r13 = byte 17 from SPD). */ -/* mode is returned in r3. */ -/* (It would be nicer having a table, pnc). */ -/*--------------------------------------------------------------------- */ -find_mode: - - mflr r5 - - cmpi 0, r10, 11 - bne fm01 - cmpi 0, r11, 9 - bne fm01 - cmpi 0, r13, 2 - bne fm01 - addi r3, 0, 1 - bl fmfound - -fm01: cmpi 0, r10, 11 - bne fm02 - cmpi 0, r11, 10 - bne fm02 - cmpi 0, r13, 2 - bne fm02 - addi r3, 0, 1 - bl fmfound - -fm02: cmpi 0, r10, 12 - bne fm03 - cmpi 0, r11, 9 - bne fm03 - cmpi 0, r13, 4 - bne fm03 - addi r3, 0, 2 - bl fmfound - -fm03: cmpi 0, r10, 12 - bne fm04 - cmpi 0, r11, 10 - bne fm04 - cmpi 0, r13, 4 - bne fm04 - addi r3, 0, 2 - bl fmfound - -fm04: cmpi 0, r10, 13 - bne fm05 - cmpi 0, r11, 9 - bne fm05 - cmpi 0, r13, 4 - bne fm05 - addi r3, 0, 3 - bl fmfound - -fm05: cmpi 0, r10, 13 - bne fm06 - cmpi 0, r11, 10 - bne fm06 - cmpi 0, r13, 4 - bne fm06 - addi r3, 0, 3 - bl fmfound - -fm06: cmpi 0, r10, 13 - bne fm07 - cmpi 0, r11, 11 - bne fm07 - cmpi 0, r13, 4 - bne fm07 - addi r3, 0, 3 - bl fmfound - -fm07: cmpi 0, r10, 12 - bne fm08 - cmpi 0, r11, 8 - bne fm08 - cmpi 0, r13, 2 - bne fm08 - addi r3, 0, 4 - bl fmfound - -fm08: cmpi 0, r10, 12 - bne fm09 - cmpi 0, r11, 8 - bne fm09 - cmpi 0, r13, 4 - bne fm09 - addi r3, 0, 4 - bl fmfound - -fm09: cmpi 0, r10, 11 - bne fm10 - cmpi 0, r11, 8 - bne fm10 - cmpi 0, r13, 2 - bne fm10 - addi r3, 0, 5 - bl fmfound - -fm10: cmpi 0, r10, 11 - bne fm11 - cmpi 0, r11, 8 - bne fm11 - cmpi 0, r13, 4 - bne fm11 - addi r3, 0, 5 - bl fmfound - -fm11: cmpi 0, r10, 13 - bne fm12 - cmpi 0, r11, 8 - bne fm12 - cmpi 0, r13, 2 - bne fm12 - addi r3, 0, 6 - bl fmfound - -fm12: cmpi 0, r10, 13 - bne fm13 - cmpi 0, r11, 8 - bne fm13 - cmpi 0, r13, 4 - bne fm13 - addi r3, 0, 6 - bl fmfound - -fm13: cmpi 0, r10, 13 - bne fm14 - cmpi 0, r11, 9 - bne fm14 - cmpi 0, r13, 2 - bne fm14 - addi r3, 0, 7 - bl fmfound - -fm14: cmpi 0, r10, 13 - bne fm15 - cmpi 0, r11, 10 - bne fm15 - cmpi 0, r13, 2 - bne fm15 - addi r3, 0, 7 - bl fmfound - -fm15: - /* not found, error code to be issued on LEDs */ - addi r7, 0, LED_SDRAM_CODE_2 - addis r6, 0, 0x1000 - ori r6, r6, 0x0001 - stb r7,0(r6) - eieio -fmerr: bl fmerr - -fmfound:addi r6, 0, 1 - subf r3, r6, r3 - - mtlr r5 /* restore lr */ - blr - -/*--------------------------------------------------------------------- */ -/* Function: find_size_code */ -/* Description: Determines size code to be used in configuring SDRAM controller */ -/* dependent on density (r15 = byte 31 from SPD) */ -/*--------------------------------------------------------------------- */ -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 - addi r9, 0, 1 - srw r3, r3, r9 - bl fs01 - - /* not found, error code to be issued on LEDs */ -fs02: addi r4, 0, LED_SDRAM_CODE_3 - addis r8, 0, 0x1000 - ori r8, r8, 0x0001 - stb r4,0(r8) - eieio -fs03: bl fs03 - -fs04: addi r3, r7, 0 - cmpi 0, r3, 0 - beq fs05 - addi r6, 0, 1 - subf r3, r6, r3 -fs05: - mtlr r5 /* restore lr */ - blr - -/*--------------------------------------------------------------------- */ -/* Function: find_casl */ -/* Description: Determines CAS latency */ -/*--------------------------------------------------------------------- */ -find_casl: - - mflr r5 - - andi. r14, r14, 0x7f /* r14 holds supported CAS latencies */ - addi r3, 0, 0xff /* preset determined CASL */ - addi r4, 0, 6 /* Start at bit 6 of supported CAS latencies */ - addi r2, 0, 0 /* Start finding highest CAS latency */ - -fc01: srw r6, r14, r4 /* */ - andi. r6, r6, 0x01 /* */ - cmpi 0, r6, 1 /* Check bit for current latency */ - bne fc06 /* If not supported, go to next */ - - cmpi 0, r2, 2 /* Check if third-highest latency */ - bge fc04 /* If so, go calculate with another format */ - - cmpi 0, r2, 0 /* Check if highest latency */ - bgt fc02 /* */ - addi r7, r19, 0 /* SDRAM cycle time for highest CAS latenty */ - - bl fc03 -fc02: - addi r7, r20, 0 /* SDRAM cycle time for next-highest CAS latenty */ -fc03: - addi r8, r7, 0 - addi r9, 0, 4 - srw r7, r7, r9 - andi. r7, r7, 0x0f - mulli r7, r7, 100 - andi. r8, r8, 0x0f - mulli r8, r8, 10 - add r7, r7, r8 - cmp 0, r7, r30 - bgt fc05 - addi r3, r2, 0 - bl fc05 -fc04: - addi r7, r21, 0 /* SDRAM cycle time for third-highest CAS latenty */ - addi r8, r7, 0 - addi r9, 0, 2 - srw r7, r7, r9 - andi. r7, r7, 0x3f - mulli r7, r7, 100 - andi. r8, r8, 0x03 - mulli r8, r8, 25 - add r7, r7, r8 - - cmp 0, r7, r30 - bgt fc05 - addi r3, r2, 0 - -fc05: addi r2, r2, 1 /* next latency */ - cmpi 0, r2, 3 - bge fc07 -fc06: addi r6, 0, 1 - subf r4, r6, r4 - cmpi 0, r4, 0 - bne fc01 - -fc07: - - mtlr r5 /* restore lr */ - blr -#endif - - -/* Peripheral Bank 1 Access Parameters */ -/* 0 BME = 1 ; burstmode enabled */ -/* " 1:8" TWT=00110110 ;Transfer wait (details below) */ -/* 1:5 FWT=00110 ; first wait = 6 cycles */ -/* 6:8 BWT=110 ; burst wait = 6 cycles */ -/* 9:11 000 ; reserved */ -/* 12:13 CSN=00 ; chip select on timing = 0 */ -/* 14:15 OEN=01 ; output enable */ -/* 16:17 WBN=01 ; write byte enable on timing 1 cycle */ -/* 18:19 WBF=01 ; write byte enable off timing 1 cycle */ -/* 20:22 TH=010 ; transfer hold = 2 cycles */ -/* 23 RE=0 ; ready enable = disabled */ -/* 24 SOR=1 ; sample on ready = same PerClk */ -/* 25 BEM=0 ; byte enable mode = only for write cycles */ -/* 26 PEN=0 ; parity enable = disable */ -/* 27:31 00000 ;reserved */ -/* */ -/* 1 + 00110 + 110 + 000 + 00 + 01 + 01 + 01 + 010 + 0 + 1 + 0 + 0 + 00000 = 0x9b015480 */ -/* */ -/* */ -/* Code for BDI probe: */ -/* */ -/* WDCR 18 0x00000011 ;Select PB1AP */ -/* WDCR 19 0x1b015480 ;PB1AP: Flash */ -/* */ -/* Peripheral Bank 0 Access Parameters */ -/* 0:11 BAS=0x200 ; base address select = 0x200 * 0x100000 (1MB) = */ -/* 12:14 BS=100 ; bank size = 16MB (100) / 32MB (101) */ -/* 15:16 BU=11 ; bank usage = read/write */ -/* 17:18 BW=00 ; bus width = 8-bit */ -/* 19:31 ; reserved */ -/* */ -/* 0x200 + 100 + 11 + 00 + 0 0000 0000 0000 = 0x20098000 */ -/* WDCR 18 0x00000001 ;Select PB1CR */ -/* WDCR 19 0x20098000 ;PB1CR: 1MB at 0x00100000, r/w, 8bit */ - -/* For CPLD */ -/* 0 + 00000 + 010 + 000 + 00 + 01 + 00 + 00 + 000 + 0 + 0 + 1 + 0 + 00000 */ -/* WDCR_EBC(pb5ap, 0x01010040) */ -/*jsa recommendation: WDCR_EBC(pb5ap, 0x00010040) */ -/* WDCR_EBC(pb5cr, 0X10018000) */ -/* Access parms */ -/* 100 3 8 0 0 0 */ -/* 0x100 + 001 + 11 + 00 + 0 0000 0000 0000 = 0x10038000 */ -/* Address : 0x10000000 */ -/* Size: 2 MB */ -/* Usage: read/write */ -/* Width: 32 bit */ - -/* For Genie onboard fpga 32 bit interface */ -/* 0 1 0 1 0 0 0 0 */ -/* 0 + 00000 + 010 + 000 + 00 + 01 + 00 + 00 + 000 + 0 + 0 + 0 + 0 + 00000 */ -/* 0x01010000 */ -/* Access parms */ -/* 102 1 c 0 0 0 */ -/* 0x102 + 000 + 11 + 10 + 0 0000 0000 0000 = 0x1021c000 */ -/* Address : 0x10200000 */ -/* 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 */ -/* Walnut fpga pb7cr */ -/* 0xF0318000 */ -/* */ |