--- arch/i386/cpu/sc520/Makefile | 2 +- arch/i386/cpu/sc520/sc520.c | 110 ------- arch/i386/cpu/sc520/sc520_asm.S | 608 ------------------------------------- arch/i386/cpu/sc520/sc520_sdram.c | 522 +++++++++++++++++++++++++++++++ arch/i386/cpu/start.S | 48 +-- arch/i386/include/asm/ic/sc520.h | 36 +++ arch/i386/lib/board.c | 8 +- board/eNET/eNET.c | 6 - board/eNET/eNET_start.S | 10 - board/eNET/eNET_start16.S | 5 - include/configs/eNET.h | 2 +- 11 files changed, 580 insertions(+), 777 deletions(-) delete mode 100644 arch/i386/cpu/sc520/sc520_asm.S create mode 100644 arch/i386/cpu/sc520/sc520_sdram.c
diff --git a/arch/i386/cpu/sc520/Makefile b/arch/i386/cpu/sc520/Makefile index 3c25cba..54260b6 100644 --- a/arch/i386/cpu/sc520/Makefile +++ b/arch/i386/cpu/sc520/Makefile @@ -33,10 +33,10 @@ LIB := $(obj)lib$(SOC).o
COBJS-$(CONFIG_SYS_SC520) += sc520.o COBJS-$(CONFIG_PCI) += sc520_pci.o +COBJS-$(CONFIG_SYS_SC520) += sc520_sdram.o COBJS-$(CONFIG_SYS_SC520_SSI) += sc520_ssi.o COBJS-$(CONFIG_SYS_SC520_TIMER) += sc520_timer.o
-SOBJS-$(CONFIG_SYS_SC520) += sc520_asm.o SOBJS-$(CONFIG_SYS_SC520) += sc520_car.o
SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) diff --git a/arch/i386/cpu/sc520/sc520.c b/arch/i386/cpu/sc520/sc520.c index 956b561..19c7100 100644 --- a/arch/i386/cpu/sc520/sc520.c +++ b/arch/i386/cpu/sc520/sc520.c @@ -31,13 +31,6 @@
DECLARE_GLOBAL_DATA_PTR;
-/* - * utility functions for boards based on the AMD sc520 - * - * void init_sc520(void) - * unsigned long init_sc520_dram(void) - */ - volatile sc520_mmcr_t *sc520_mmcr = (sc520_mmcr_t *)SC520_MMCR_BASE;
int cpu_init_f(void) @@ -65,109 +58,6 @@ int cpu_init_f(void) return x86_cpu_init_f(); }
-unsigned long init_sc520_dram(void) -{ - bd_t *bd = gd->bd; - - u32 dram_present=0; - u32 dram_ctrl; - -#ifdef CONFIG_SYS_SDRAM_DRCTMCTL - /* these memory control registers are set up in the assember part, - * in sc520_asm.S, during 'mem_init'. If we muck with them here, - * after we are running a stack in RAM, we have troubles. Besides, - * these refresh and delay values are better ? simply specified - * outright in the include/configs/{cfg} file since the HW designer - * simply dictates it. - */ -#else - u8 tmp; - u8 val; - - int cas_precharge_delay = CONFIG_SYS_SDRAM_PRECHARGE_DELAY; - int refresh_rate = CONFIG_SYS_SDRAM_REFRESH_RATE; - int ras_cas_delay = CONFIG_SYS_SDRAM_RAS_CAS_DELAY; - - /* set SDRAM speed here */ - - refresh_rate /= 78; - if (refresh_rate <= 1) { - val = 0; /* 7.8us */ - } else if (refresh_rate == 2) { - val = 1; /* 15.6us */ - } else if (refresh_rate == 3 || refresh_rate == 4) { - val = 2; /* 31.2us */ - } else { - val = 3; /* 62.4us */ - } - - tmp = (readb(&sc520_mmcr->drcctl) & 0xcf) | (val<<4); - writeb(tmp, &sc520_mmcr->drcctl); - - val = readb(&sc520_mmcr->drctmctl) & 0xf0; - - if (cas_precharge_delay==3) { - val |= 0x04; /* 3T */ - } else if (cas_precharge_delay==4) { - val |= 0x08; /* 4T */ - } else if (cas_precharge_delay>4) { - val |= 0x0c; - } - - if (ras_cas_delay > 3) { - val |= 2; - } else { - val |= 1; - } - writeb(val, &c520_mmcr->drctmctl); -#endif - - /* - * We read-back the configuration of the dram - * controller that the assembly code wrote - */ - dram_ctrl = readl(&sc520_mmcr->drcbendadr); - - bd->bi_dram[0].start = 0; - if (dram_ctrl & 0x80) { - /* bank 0 enabled */ - dram_present = bd->bi_dram[1].start = (dram_ctrl & 0x7f) << 22; - bd->bi_dram[0].size = bd->bi_dram[1].start; - } else { - bd->bi_dram[0].size = 0; - bd->bi_dram[1].start = bd->bi_dram[0].start; - } - - if (dram_ctrl & 0x8000) { - /* bank 1 enabled */ - dram_present = bd->bi_dram[2].start = (dram_ctrl & 0x7f00) << 14; - bd->bi_dram[1].size = bd->bi_dram[2].start - bd->bi_dram[1].start; - } else { - bd->bi_dram[1].size = 0; - bd->bi_dram[2].start = bd->bi_dram[1].start; - } - - if (dram_ctrl & 0x800000) { - /* bank 2 enabled */ - dram_present = bd->bi_dram[3].start = (dram_ctrl & 0x7f0000) << 6; - bd->bi_dram[2].size = bd->bi_dram[3].start - bd->bi_dram[2].start; - } else { - bd->bi_dram[2].size = 0; - bd->bi_dram[3].start = bd->bi_dram[2].start; - } - - if (dram_ctrl & 0x80000000) { - /* bank 3 enabled */ - dram_present = (dram_ctrl & 0x7f000000) >> 2; - bd->bi_dram[3].size = dram_present - bd->bi_dram[3].start; - } else { - bd->bi_dram[3].size = 0; - } - gd->ram_size = dram_present; - - return dram_present; -} - #ifdef CONFIG_SYS_SC520_RESET void reset_cpu(ulong addr) { diff --git a/arch/i386/cpu/sc520/sc520_asm.S b/arch/i386/cpu/sc520/sc520_asm.S deleted file mode 100644 index 2e85370..0000000 --- a/arch/i386/cpu/sc520/sc520_asm.S +++ /dev/null @@ -1,608 +0,0 @@ -/* - * (C) Copyright 2002 - * Daniel Engström, Omicron Ceti AB daniel@omicron.se. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * 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 - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -/* This file is largely based on code obtned from AMD. AMD's original - * copyright is included below - */ - -/* TITLE SIZER - Aspen DRAM Sizing Routine. - * ============================================================================= - * - * Copyright 1999 Advanced Micro Devices, Inc. - * You may redistribute this program and/or modify this program under the terms - * of the GNU General Public License as published by the Free Software Foundation; - * either version 2 of the License, or (at your option) any later version. - * - * This program is distributed WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED - * WARRANTY OF 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 along with - * this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - * - * THE MATERIALS ARE PROVIDED "AS IS" WITHOUT ANY EXPRESS OR IMPLIED WARRANTY - * OF ANY KIND INCLUDING WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT OF - * THIRD-PARTY INTELLECTUAL PROPERTY, OR FITNESS FOR ANY PARTICULAR PURPOSE. - * IN NO EVENT SHALL AMD OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER - * (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS - * INTERRUPTION, LOSS OF INFORMATION) ARISING OUT OF THE USE OF OR INABILITY - * TO USE THE MATERIALS, EVEN IF AMD HAS BEEN ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGES. BECAUSE SOME JURSIDICTIONS PROHIBIT THE EXCLUSION OR - * LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE - * LIMITATION MAY NOT APPLY TO YOU. - * - * AMD does not assume any responsibility for any errors that may appear in - * the Materials nor any responsibility to support or update the Materials. - * AMD retains the right to make changes to its test specifications at any - * time, without notice. - * ============================================================================== - */ - -/* - ****************************************************************************** - * - * FILE : sizer.asm - SDRAM DIMM Sizing Algorithm - * - * - * - * FUNCTIONS : sizemem() - jumped to, not called. To be executed after - * reset to determine the size of the SDRAM DIMMs. Initializes - * the memory subsystem. - * - * - * AUTHOR : Buddy Fey - Original. - * - * - * DESCRIPTION : Performs sizing on SDRAM DIMMs on ASPEN processor. - * NOTE: This is a small memory model version - * - * - * INPUTS : BP contains return address offset - * CACHE is assumed to be disabled. - * The FS segment limit has already been set to big real mode - * (full 32-bit addressing capability) - * - * - * OUTPUTS : None - * - * - * REG USE : ax,bx,cx,dx,di,si,bp, fs - * - * - * REVISION : See PVCS info below - * - * - * TEST PLAN CROSS REFERENCE: - * - * - * $Workfile: $ - * $Revision: 1.2 $ - * $Date: 1999/09/22 12:49:33 $ - * $Author: chipf $ - * $Log: sizer.asm $ - * Revision 1.2 1999/09/22 12:49:33 chipf - * Add legal header - * - ******************************************************************************* - */ - - -/******************************************************************************* - * FUNCTIONAL DESCRIPTION: - * This routine is called to autodetect the geometry of the DRAM. - * - * This routine is called to determine the number of column bits for the DRAM - * devices in this external bank. This routine assumes that the external bank - * has been configured for an 11-bit column and for 4 internal banks. This gives - * us the maximum address reach in memory. By writing a test value to the max - * address and locating where it aliases to, we can determine the number of valid - * column bits. - * - * This routine is called to determine the number of internal banks each DRAM - * device has. The external bank (under test) is configured for maximum reach - * with 11-bit columns and 4 internal banks. This routine will write to a max - * address (BA1 and BA0 = 1) and then read from an address with BA1=0 to see if - * that column is a "don't care". If BA1 does not affect write/read of data, - * then this device has only 2 internal banks. - * - * This routine is called to determine the ending address for this external - * bank of SDRAM. We write to a max address with a data value and then disable - * row address bits looking for "don't care" locations. Each "don't care" bit - * represents a dividing of the maximum density (128M) by 2. By dividing the - * maximum of 32 4M chunks in an external bank down by all the "don't care" bits - * determined during sizing, we set the proper density. - * - * WARNINGS. - * bp must be preserved because it is used for return linkage. - * - * EXIT - * nothing returned - but the memory subsystem is enabled - ******************************************************************************* - */ - -#include <config.h> -#include <asm/ic/sc520.h> - -.section .text -.equ CACHELINESZ, 0x00000010 /* size of our cache line (read buffer) */ -.equ COL11_ADR, 0x0e001e00 /* 11 col addrs */ -.equ COL10_ADR, 0x0e000e00 /* 10 col addrs */ -.equ COL09_ADR, 0x0e000600 /* 9 col addrs */ -.equ COL08_ADR, 0x0e000200 /* 8 col addrs */ -.equ ROW14_ADR, 0x0f000000 /* 14 row addrs */ -.equ ROW13_ADR, 0x07000000 /* 13 row addrs */ -.equ ROW12_ADR, 0x03000000 /* 12 row addrs */ -.equ ROW11_ADR, 0x01000000 /* 11 row addrs/also bank switch */ -.equ ROW10_ADR, 0x00000000 /* 10 row addrs/also bank switch */ -.equ COL11_DATA, 0x0b0b0b0b /* 11 col addrs */ -.equ COL10_DATA, 0x0a0a0a0a /* 10 col data */ -.equ COL09_DATA, 0x09090909 /* 9 col data */ -.equ COL08_DATA, 0x08080808 /* 8 col data */ -.equ ROW14_DATA, 0x3f3f3f3f /* 14 row data (MASK) */ -.equ ROW13_DATA, 0x1f1f1f1f /* 13 row data (MASK) */ -.equ ROW12_DATA, 0x0f0f0f0f /* 12 row data (MASK) */ -.equ ROW11_DATA, 0x07070707 /* 11 row data/also bank switch (MASK) */ -.equ ROW10_DATA, 0xaaaaaaaa /* 10 row data/also bank switch (MASK) */ - -.globl mem_init -mem_init: - /* Preserve Boot Flags */ - movl %ebx, %ebp - - /* initialize dram controller registers */ - xorw %ax, %ax - movl $SC520_DBCTL, %edi - movb %al, (%edi) /* disable write buffer */ - - movl $SC520_ECCCTL, %edi - movb %al, (%edi) /* disable ECC */ - - movl $SC520_DRCTMCTL, %edi - movb $0x1e, %al /* Set SDRAM timing for slowest */ - movb %al, (%edi) - - /* setup loop to do 4 external banks starting with bank 3 */ - movl $0xff000000, %eax /* enable last bank and setup */ - movl $SC520_DRCBENDADR, %edi /* ending address register */ - movl %eax, (%edi) - - movl $SC520_DRCCFG, %edi /* setup */ - movw $0xbbbb, %ax /* dram config register for */ - movw %ax, (%edi) - - /* issue a NOP to all DRAMs */ - movl $SC520_DRCCTL, %edi /* setup DRAM control register with */ - movb $0x01, %al /* Disable refresh,disable write buffer */ - movb %al, (%edi) - movl $CACHELINESZ, %esi /* just a dummy address to write for */ - movw %ax, (%esi) - - /* delay for 100 usec? */ - movw $100, %cx -sizdelay: - loop sizdelay - - /* issue all banks precharge */ - movb $0x02, %al - movb %al, (%edi) - movw %ax, (%esi) - - /* issue 2 auto refreshes to all banks */ - movb $0x04, %al /* Auto refresh cmd */ - movb %al, (%edi) - movw $0x02, %cx -refresh1: - movw %ax, (%esi) - loop refresh1 - - /* issue LOAD MODE REGISTER command */ - movb $0x03, %al /* Load mode register cmd */ - movb %al, (%edi) - movw %ax, (%esi) - - /* issue 8 more auto refreshes to all banks */ - movb $0x04, %al /* Auto refresh cmd */ - movb %al, (%edi) - movw $0x0008, %cx -refresh2: - movw %ax, (%esi) - loop refresh2 - - /* set control register to NORMAL mode */ - movb $0x00, %al /* Normal mode value */ - movb %al, (%edi) - - /* - * size dram starting with external bank 3 - * moving to external bank 0 - */ - movl $0x3, %ecx /* start with external bank 3 */ - -nextbank: - - /* write col 11 wrap adr */ - movl $COL11_ADR, %esi /* set address to max col (11) wrap addr */ - movl $COL11_DATA, %eax /* pattern for max supported columns(11) */ - movl %eax, (%esi) /* write max col pattern at max col adr */ - movl (%esi), %ebx /* optional read */ - cmpl %ebx, %eax /* to verify write */ - jnz bad_ram /* this ram is bad */ - - /* write col 10 wrap adr */ - movl $COL10_ADR, %esi /* set address to 10 col wrap address */ - movl $COL10_DATA, %eax /* pattern for 10 col wrap */ - movl %eax, (%esi) /* write 10 col pattern @ 10 col wrap adr */ - movl (%esi), %ebx /* optional read */ - cmpl %ebx, %eax /* to verify write */ - jnz bad_ram /* this ram is bad */ - - /* write col 9 wrap adr */ - movl $COL09_ADR, %esi /* set address to 9 col wrap address */ - movl $COL09_DATA, %eax /* pattern for 9 col wrap */ - movl %eax, (%esi) /* write 9 col pattern @ 9 col wrap adr */ - movl (%esi), %ebx /* optional read */ - cmpl %ebx, %eax /* to verify write */ - jnz bad_ram /* this ram is bad */ - - /* write col 8 wrap adr */ - movl $COL08_ADR, %esi /* set address to min(8) col wrap address */ - movl $COL08_DATA, %eax /* pattern for min (8) col wrap */ - movl %eax, (%esi) /* write min col pattern @ min col adr */ - movl (%esi), %ebx /* optional read */ - cmpl %ebx, %eax /* to verify write */ - jnz bad_ram /* this ram is bad */ - - /* write row 14 wrap adr */ - movl $ROW14_ADR, %esi /* set address to max row (14) wrap addr */ - movl $ROW14_DATA, %eax /* pattern for max supported rows(14) */ - movl %eax, (%esi) /* write max row pattern at max row adr */ - movl (%esi), %ebx /* optional read */ - cmpl %ebx, %eax /* to verify write */ - jnz bad_ram /* this ram is bad */ - - /* write row 13 wrap adr */ - movl $ROW13_ADR, %esi /* set address to 13 row wrap address */ - movl $ROW13_DATA, %eax /* pattern for 13 row wrap */ - movl %eax, (%esi) /* write 13 row pattern @ 13 row wrap adr */ - movl (%esi), %ebx /* optional read */ - cmpl %ebx, %eax /* to verify write */ - jnz bad_ram /* this ram is bad */ - - /* write row 12 wrap adr */ - movl $ROW12_ADR, %esi /* set address to 12 row wrap address */ - movl $ROW12_DATA, %eax /* pattern for 12 row wrap */ - movl %eax, (%esi) /* write 12 row pattern @ 12 row wrap adr */ - movl (%esi), %ebx /* optional read */ - cmpl %ebx, %eax /* to verify write */ - jnz bad_ram /* this ram is bad */ - - /* write row 11 wrap adr */ - movl $ROW11_ADR, %edi /* set address to 11 row wrap address */ - movl $ROW11_DATA, %eax /* pattern for 11 row wrap */ - movl %eax, (%edi) /* write 11 row pattern @ 11 row wrap adr */ - movl (%edi), %ebx /* optional read */ - cmpl %ebx, %eax /* to verify write */ - jnz bad_ram /* this ram is bad */ - - /* - * write row 10 wrap adr --- this write is really to determine - * number of banks - */ - movl $ROW10_ADR, %edi /* set address to 10 row wrap address */ - movl $ROW10_DATA, %eax /* pattern for 10 row wrap (AA) */ - movl %eax, (%edi) /* write 10 row pattern @ 10 row wrap adr */ - movl (%edi), %ebx /* optional read */ - cmpl %ebx, %eax /* to verify write */ - jnz bad_ram /* this ram is bad */ - - /* - * read data @ row 12 wrap adr to determine * banks, - * and read data @ row 14 wrap adr to determine * rows. - * if data @ row 12 wrap adr is not AA, 11 or 12 we have bad RAM. - * if data @ row 12 wrap == AA, we only have 2 banks, NOT 4 - * if data @ row 12 wrap == 11 or 12, we have 4 banks, - */ - xorw %di, %di /* value for 2 banks in DI */ - movl (%esi), %ebx /* read from 12 row wrap to check banks */ - /* (esi is setup from the write to row 12 wrap) */ - cmpl %ebx, %eax /* check for AA pattern (eax holds the aa pattern) */ - jz only2 /* if pattern == AA, we only have 2 banks */ - - /* 4 banks */ - - movw $0x008, %di /* value for 4 banks in DI (BNK_CNT bit) */ - cmpl $ROW11_DATA, %ebx /* only other legitimate values are 11 */ - jz only2 - cmpl $ROW12_DATA, %ebx /* and 12 */ - jnz bad_ram /* its bad if not 11 or 12! */ - - /* fall through */ -only2: - /* - * validate row mask - */ - movl $ROW14_ADR, %esi /* set address back to max row wrap addr */ - movl (%esi), %eax /* read actual number of rows @ row14 adr */ - - cmpl $ROW11_DATA, %eax /* row must be greater than 11 pattern */ - jb bad_ram - - cmpl $ROW14_DATA, %eax /* and row must be less than 14 pattern */ - ja bad_ram - - cmpb %ah, %al /* verify all 4 bytes of dword same */ - jnz bad_ram - movl %eax, %ebx - shrl $16, %ebx - cmpw %bx, %ax - jnz bad_ram - - /* - * read col 11 wrap adr for real column data value - */ - movl $COL11_ADR, %esi /* set address to max col (11) wrap addr */ - movl (%esi), %eax /* read real col number at max col adr */ - - /* - * validate column data - */ - cmpl $COL08_DATA, %eax /* col must be greater than 8 pattern */ - jb bad_ram - - cmpl $COL11_DATA, %eax /* and row must be less than 11 pattern */ - ja bad_ram - - subl $COL08_DATA, %eax /* normalize column data to zero */ - jc bad_ram - cmpb %ah, %al /* verify all 4 bytes of dword equal */ - jnz bad_ram - movl %eax, %edx - shrl $16, %edx - cmpw %dx, %ax - jnz bad_ram - - /* - * merge bank and col data together - */ - addw %di, %dx /* merge of bank and col info in dl */ - - /* - * fix ending addr mask based upon col info - */ - movb $0x03, %al - subb %dh, %al /* dh contains the overflow from the bank/col merge */ - movb %bl, %dh /* bl contains the row mask (aa, 07, 0f, 1f or 3f) */ - xchgw %cx, %ax /* cx = ax = 3 or 2 depending on 2 or 4 bank device */ - shrb %cl, %dh - incb %dh /* ending addr is 1 greater than real end */ - xchgw %cx, %ax /* cx is bank number again */ - -bad_reint: - /* - * issue all banks precharge - */ - movl $SC520_DRCCTL, %esi /* setup DRAM control register with */ - movb $0x02, %al /* All banks precharge */ - movb %al, (%esi) - movl $CACHELINESZ, %esi /* address to init read buffer */ - movw %ax, (%esi) - - /* - * update ENDING ADDRESS REGISTER - */ - movl $SC520_DRCBENDADR, %edi /* DRAM ending address register */ - movl %ecx, %ebx - addl %ebx, %edi - movb %dh, (%edi) - - /* - * update CONFIG REGISTER - */ - xorb %dh, %dh - movw $0x000f, %bx - movw %cx, %ax - shlw $2, %ax - xchgw %cx, %ax - shlw %cl, %dx - shlw %cl, %bx - notw %bx - xchgw %cx, %ax - movl $SC520_DRCCFG, %edi - movw (%edi), %ax - andw %bx, %ax - orw %dx, %ax - movw %ax, (%edi) - jcxz cleanup - - decw %cx - movl %ecx, %ebx - movl $SC520_DRCBENDADR, %edi /* DRAM ending address register */ - movb $0xff, %al - addl %ebx, %edi - movb %al, (%edi) - - /* - * set control register to NORMAL mode - */ - movl $SC520_DRCCTL, %esi /* setup DRAM control register with */ - movb $0x00, %al /* Normal mode value */ - movb %al, (%esi) - movl $CACHELINESZ, %esi /* address to init read buffer */ - movw %ax, (%esi) - jmp nextbank - -cleanup: - movl $SC520_DRCBENDADR, %edi /* DRAM ending address register */ - movw $0x04, %cx - xorw %ax, %ax -cleanuplp: - movb (%edi), %al - orb %al, %al - jz emptybank - - addb %ah, %al - jns nottoomuch - - movb $0x7f, %al -nottoomuch: - movb %al, %ah - orb $0x80, %al - movb %al, (%edi) -emptybank: - incl %edi - loop cleanuplp - -#if defined CONFIG_SYS_SDRAM_DRCTMCTL - /* just have your hardware desinger _GIVE_ you what you need here! */ - movl $SC520_DRCTMCTL, %edi - movb $CONFIG_SYS_SDRAM_DRCTMCTL, %al - movb %al, (%edi) -#else -#if defined(CONFIG_SYS_SDRAM_CAS_LATENCY_2T) || defined(CONFIG_SYS_SDRAM_CAS_LATENCY_3T) - /* - * Set the CAS latency now since it is hard to do - * when we run from the RAM - */ - movl $SC520_DRCTMCTL, %edi /* DRAM timing register */ - movb (%edi), %al -#ifdef CONFIG_SYS_SDRAM_CAS_LATENCY_2T - andb $0xef, %al -#endif -#ifdef CONFIG_SYS_SDRAM_CAS_LATENCY_3T - orb $0x10, %al -#endif - movb %al, (%edi) -#endif -#endif - movl $SC520_DRCCTL, %edi /* DRAM Control register */ - movb $0x03, %al /* Load mode register cmd */ - movb %al, (%edi) - movw %ax, (%esi) - - - movl $SC520_DRCCTL, %edi /* DRAM Control register */ - movb $0x18, %al /* Enable refresh and NORMAL mode */ - movb %al, (%edi) - - jmp dram_done - -bad_ram: - xorl %edx, %edx - xorl %edi, %edi - jmp bad_reint - -dram_done: - /* Restore Boot Flags */ - movl %ebx, %ebp - ret - -#if CONFIG_SYS_SDRAM_ECC_ENABLE -.globl init_ecc -init_ecc: - /* A nominal memory test: just a byte at each address line */ - movl %eax, %ecx - shrl $0x1, %ecx - movl $0x1, %edi -memtest0: - movb $0xa5, (%edi) - cmpb $0xa5, (%edi) - jne out - shrl $0x1, %ecx - andl %ecx, %ecx - jz set_ecc - shll $0x1, %edi - jmp memtest0 - -set_ecc: - /* clear all ram with a memset */ - movl %eax, %ecx - xorl %esi, %esi - xorl %edi, %edi - xorl %eax, %eax - shrl $0x2, %ecx - cld - rep stosl - - /* enable read, write buffers */ - movb $0x11, %al - movl $SC520_DBCTL, %edi - movb %al, (%edi) - - /* enable NMI mapping for ECC */ - movl $SC520_ECCINT, %edi - movb $0x10, %al - movb %al, (%edi) - - /* Turn on ECC */ - movl $SC520_ECCCTL, %edi - movb $0x05, %al - movb %al,(%edi) - -out: - ret -#endif - -/* - * Read and decode the sc520 DRCBENDADR MMCR and return the number of - * available ram bytes in %eax - */ -.globl get_mem_size -get_mem_size: - movl $SC520_DRCBENDADR, %edi /* DRAM ending address register */ - -bank0: movl (%edi), %eax - movl %eax, %ecx - andl $0x00000080, %ecx - jz bank1 - andl $0x0000007f, %eax - shll $22, %eax - movl %eax, %edx - -bank1: movl (%edi), %eax - movl %eax, %ecx - andl $0x00008000, %ecx - jz bank2 - andl $0x00007f00, %eax - shll $14, %eax - movl %eax, %edx - -bank2: movl (%edi), %eax - movl %eax, %ecx - andl $0x00800000, %ecx - jz bank3 - andl $0x007f0000, %eax - shll $6, %eax - movl %eax, %edx - -bank3: movl (%edi), %eax - movl %eax, %ecx - andl $0x80000000, %ecx - jz done - andl $0x7f000000, %eax - shrl $2, %eax - movl %eax, %edx - -done: - movl %edx, %eax - ret diff --git a/arch/i386/cpu/sc520/sc520_sdram.c b/arch/i386/cpu/sc520/sc520_sdram.c new file mode 100644 index 0000000..74f8233 --- /dev/null +++ b/arch/i386/cpu/sc520/sc520_sdram.c @@ -0,0 +1,522 @@ +/* + * (C) Copyright 2010 + * Graeme Russ graeme.russ@gmail.com. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/processor-flags.h> +#include <asm/ic/sc520.h> + +DECLARE_GLOBAL_DATA_PTR; + +struct sc520_sdram_info { + u8 banks; + u8 columns; + u8 rows; + u8 size; +}; + +static void sc520_sizemem(void); +static void sc520_set_dram_timing(void); +static void sc520_set_dram_refresh_rate(void); +static void sc520_enable_dram_refresh(void); +static void sc520_enable_sdram(void); +#if CONFIG_SYS_SDRAM_ECC_ENABLE +static void sc520_enable_ecc(void) +#endif + +int dram_init_f(void) +{ + sc520_sizemem(); + sc520_set_dram_timing(); + sc520_set_dram_refresh_rate(); + sc520_enable_dram_refresh(); + sc520_enable_sdram(); +#if CONFIG_SYS_SDRAM_ECC_ENABLE + sc520_enable_ecc(); +#endif + + return 0; +} + +static inline void sc520_dummy_write(void) +{ + writew(0x0000, CACHELINESZ); +} +static inline void sc520_issue_sdram_op_mode_select(u8 command) +{ + writeb(command, &sc520_mmcr->drcctl); + sc520_dummy_write(); +} + +static inline int check_long(u32 test_long) +{ + u8 i; + u8 tmp_byte = (u8)(test_long & 0x000000ff); + + for (i=1; i<4; i++) { + if ((u8)((test_long >> (i * 8)) & 0x000000ff) != tmp_byte) + return -1; + } + + return 0; +} + +static inline int write_and_test(u32 data, u32 address) +{ + writel(data, address); + if (readl(address) == data) + return 0; /* Good */ + else + return -1; /* Bad */ +} + +static void sc520_enable_sdram(void) +{ + u32 par_config; + + /* Enable Writes, Caching and Code Execution to SDRAM */ + par_config = readl(&sc520_mmcr->par[3]); + par_config &= ~(SC520_PAR_EXEC_DIS | + SC520_PAR_CACHE_DIS | + SC520_PAR_WRITE_DIS); + writel(par_config, &sc520_mmcr->par[3]); + + par_config = readl(&sc520_mmcr->par[4]); + par_config &= ~(SC520_PAR_EXEC_DIS | + SC520_PAR_CACHE_DIS | + SC520_PAR_WRITE_DIS); + writel(par_config, &sc520_mmcr->par[4]); +} + +static void sc520_set_dram_timing(void) +{ + u8 drctmctl = 0x00; + +#if defined CONFIG_SYS_SDRAM_DRCTMCTL + /* just have your hardware designer _GIVE_ you what you need here! */ + drctmctl = CONFIG_SYS_SDRAM_DRCTMCTL; +#else + switch (CONFIG_SYS_SDRAM_RAS_CAS_DELAY) { + case 2: + break; + case 3: + drctmctl |= 0x01; + break; + case 4: + default: + drctmctl |= 0x02; + break; + } + + switch (CONFIG_SYS_SDRAM_PRECHARGE_DELAY) { + case 2: + break; + case 3: + drctmctl |= 0x04; + break; + case 4: + default: + drctmctl |= 0x08; + break; + + case 6: + drctmctl |= 0x0c; + break; + } + + switch (CONFIG_SYS_SDRAM_CAS_LATENCY) { + case 2: + break; + case 3: + default: + drctmctl |= 0x10; + break; + } +#endif + writeb(drctmctl, &sc520_mmcr->drctmctl); + + /* Issue load mode register command */ + sc520_issue_sdram_op_mode_select(0x03); +} + +static void sc520_set_dram_refresh_rate(void) +{ + u8 drctl; + + drctl = readb(&sc520_mmcr->drcctl); + drctl &= 0xcf; + + switch (CONFIG_SYS_SDRAM_REFRESH_RATE) { + case 78: + break; + case 156: + default: + drctl |= 0x10; + break; + case 312: + drctl |= 0x20; + break; + case 624: + drctl |= 0x30; + break; + } + + writeb(drctl, &sc520_mmcr->drcctl); +} + +static void sc520_enable_dram_refresh(void) +{ + u8 drctl; + + drctl = readb(&sc520_mmcr->drcctl); + drctl &= 0x30; /* keep refresh rate */ + drctl |= 0x08; /* enable refresh, normal mode */ + + writeb(drctl, &sc520_mmcr->drcctl); +} + +static void sc520_get_bank_info(int bank, struct sc520_sdram_info *bank_info) +{ + u32 col_data; + u32 row_data; + + u32 drcbendadr; + u16 drccfg; + + u8 banks = 0x00; + u8 columns = 0x00; + u8 rows = 0x00; + + bank_info->banks = 0x00; + bank_info->columns = 0x00; + bank_info->rows = 0x00; + bank_info->size = 0x00; + + if ((bank < 0) || (bank >3)) { + printf("Bad Bank ID\n"); + return; + } + + /* Save configuration */ + drcbendadr = readl(&sc520_mmcr->drcbendadr); + drccfg = readw(&sc520_mmcr->drccfg); + + /* Setup SDRAM Bank to largest possible size */ + writew(0x000b << (bank * 4), &sc520_mmcr->drccfg); + + /* Set ending address for this bank */ + writel(0x000000ff << (bank * 8), &sc520_mmcr->drcbendadr); + + /* write col 11 wrap adr */ + if (write_and_test(COL11_DATA, COL11_ADR) != 0) + goto restore_and_exit; + + /* write col 10 wrap adr */ + if (write_and_test(COL10_DATA, COL10_ADR) != 0) + goto restore_and_exit; + + /* write col 9 wrap adr */ + if (write_and_test(COL09_DATA, COL09_ADR) != 0) + goto restore_and_exit; + + /* write col 8 wrap adr */ + if (write_and_test(COL08_DATA, COL08_ADR) != 0) + goto restore_and_exit; + + col_data = readl(COL11_ADR); + + /* All four bytes in the read long must be the same */ + if (check_long(col_data) < 0) + goto restore_and_exit; + + if ((col_data >= COL08_DATA) && (col_data <= COL11_DATA)) + columns = (u8)(col_data & 0x000000ff); + else + goto restore_and_exit; + + /* write row 14 wrap adr */ + if (write_and_test(ROW14_DATA, ROW14_ADR) != 0) + goto restore_and_exit; + + /* write row 13 wrap adr */ + if (write_and_test(ROW13_DATA, ROW13_ADR) != 0) + goto restore_and_exit; + + /* write row 12 wrap adr */ + if (write_and_test(ROW12_DATA, ROW12_ADR) != 0) + goto restore_and_exit; + + /* write row 11 wrap adr */ + if (write_and_test(ROW11_DATA, ROW11_ADR) != 0) + goto restore_and_exit; + + if (write_and_test(ROW10_DATA, ROW10_ADR) != 0) + goto restore_and_exit; + + /* + * read data @ row 12 wrap adr to determine number of banks, + * and read data @ row 14 wrap adr to determine number of rows. + * if data @ row 12 wrap adr is not AA, 11 or 12 we have bad RAM. + * if data @ row 12 wrap == AA, we only have 2 banks, NOT 4 + * if data @ row 12 wrap == 11 or 12, we have 4 banks, + */ + row_data = readl(ROW12_ADR); + + /* All four bytes in the read long must be the same */ + if (check_long(row_data) != 0) + goto restore_and_exit; + + switch (row_data) { + case ROW10_DATA: + banks = 2; + break; + + case ROW11_DATA: + case ROW12_DATA: + banks = 4; + break; + + default: + goto restore_and_exit; + } + + row_data = readl(ROW14_ADR); + + /* All four bytes in the read long must be the same */ + if (check_long(row_data) != 0) + goto restore_and_exit; + + switch (row_data) { + case ROW11_DATA: + case ROW12_DATA: + case ROW13_DATA: + case ROW14_DATA: + rows = (u8)(row_data & 0x000000ff); + break; + + default: + goto restore_and_exit; + } + + bank_info->banks = banks; + bank_info->columns = columns; + bank_info->rows = rows; + + if ((bank_info->banks != 0) && + (bank_info->columns != 0) && + (bank_info->rows != 0)) { + bank_info->size = bank_info->rows; + bank_info->size >>= (11 - bank_info->columns); + bank_info->size++; + } + +restore_and_exit: + /* Restore configuration */ + writel(drcbendadr, &sc520_mmcr->drcbendadr); + writew(drccfg, &sc520_mmcr->drccfg); +} + +static void sc520_setup_sizemem(void) +{ + u8 i; + + /* Setup PARs for 256MB of non-cached SDRAM */ + writel(SC520_SDRAM1_PAR, &sc520_mmcr->par[3]); + writel(SC520_SDRAM2_PAR, &sc520_mmcr->par[4]); + + /* Disable write buffer */ + writeb(0x00, &sc520_mmcr->dbctl); + + /* Disable ECC */ + writeb(0x00, &sc520_mmcr->eccctl); + + /* Set slowest SDRAM timing */ + writeb(0x1e, &sc520_mmcr->drctmctl); + + /* Issue a NOP to all SDRAM banks */ + sc520_issue_sdram_op_mode_select(0x01); + + /* Delay for 100 microseconds */ + udelay(100); + + /* Issue 'All Banks Precharge' command */ + sc520_issue_sdram_op_mode_select(0x02); + + /* Issue 2 'Auto Refresh Enable' command */ + sc520_issue_sdram_op_mode_select(0x04); + sc520_dummy_write(); + + /* Issue 'Load Mode Register' command */ + sc520_issue_sdram_op_mode_select(0x03); + + /* Issue 8 more 'Auto Refresh Enable' commands */ + sc520_issue_sdram_op_mode_select(0x04); + for (i=0; i<7; i++) + sc520_dummy_write(); + + /* Set control register to 'Normal Mode' */ + writeb(0x00, &sc520_mmcr->drcctl); +} + +static void sc520_sizemem(void) +{ + struct sc520_sdram_info sdram_info[4]; + u8 bank_config = 0x00; + u8 end_addr = 0x00; + u16 drccfg = 0x0000; + u32 drcbendadr = 0x00000000; + u8 i; + + sc520_setup_sizemem(); + + gd->ram_size = 0; + + /* Size each SDRAM bank */ + for (i=0; i<=3; i++) { + sc520_get_bank_info(i, &sdram_info[i]); + + if (sdram_info[i].banks != 0) { + /* Update Configuration register */ + bank_config = sdram_info[i].columns - 8; + + if (sdram_info[i].banks == 4) + bank_config |= 0x08; + + drccfg |= bank_config << (i * 4); + + /* Update End Address register */ + end_addr += sdram_info[i].size; + drcbendadr |= (end_addr | 0x80) << (i * 8); + + gd->ram_size += sdram_info[i].size << 22; + } + + /* Issue 'All Banks Precharge' command */ + sc520_issue_sdram_op_mode_select(0x02); + + /* Set control register to 'Normal Mode' */ + writeb(0x00, &sc520_mmcr->drcctl); + } + + writel(drcbendadr, &sc520_mmcr->drcbendadr); + writew(drccfg, &sc520_mmcr->drccfg); +} + +#if CONFIG_SYS_SDRAM_ECC_ENABLE +static void sc520_enable_ecc(void) + + /* A nominal memory test: just a byte at each address line */ + movl %eax, %ecx + shrl $0x1, %ecx + movl $0x1, %edi +memtest0: + movb $0xa5, (%edi) + cmpb $0xa5, (%edi) + jne out + shrl $0x1, %ecx + andl %ecx, %ecx + jz set_ecc + shll $0x1, %edi + jmp memtest0 + +set_ecc: + /* clear all ram with a memset */ + movl %eax, %ecx + xorl %esi, %esi + xorl %edi, %edi + xorl %eax, %eax + shrl $0x2, %ecx + cld + rep stosl + + /* enable read, write buffers */ + movb $0x11, %al + movl $DBCTL, %edi + movb %al, (%edi) + + /* enable NMI mapping for ECC */ + movl $ECCINT, %edi + movb $0x10, %al + movb %al, (%edi) + + /* Turn on ECC */ + movl $ECCCTL, %edi + movb $0x05, %al + movb %al,(%edi) + +out: + jmp init_ecc_ret +} +#endif + +int dram_init(void) +{ + ulong dram_ctrl; + ulong dram_present = 0x00000000; + + /* + * We read-back the configuration of the dram + * controller that the assembly code wrote + */ + dram_ctrl = readl(&sc520_mmcr->drcbendadr); + + gd->bd->bi_dram[0].start = 0; + if (dram_ctrl & 0x80) { + /* bank 0 enabled */ + dram_present = gd->bd->bi_dram[1].start = (dram_ctrl & 0x7f) << 22; + gd->bd->bi_dram[0].size = gd->bd->bi_dram[1].start; + } else { + gd->bd->bi_dram[0].size = 0; + gd->bd->bi_dram[1].start = gd->bd->bi_dram[0].start; + } + + if (dram_ctrl & 0x8000) { + /* bank 1 enabled */ + dram_present = gd->bd->bi_dram[2].start = (dram_ctrl & 0x7f00) << 14; + gd->bd->bi_dram[1].size = gd->bd->bi_dram[2].start - gd->bd->bi_dram[1].start; + } else { + gd->bd->bi_dram[1].size = 0; + gd->bd->bi_dram[2].start = gd->bd->bi_dram[1].start; + } + + if (dram_ctrl & 0x800000) { + /* bank 2 enabled */ + dram_present = gd->bd->bi_dram[3].start = (dram_ctrl & 0x7f0000) << 6; + gd->bd->bi_dram[2].size = gd->bd->bi_dram[3].start - gd->bd->bi_dram[2].start; + } else { + gd->bd->bi_dram[2].size = 0; + gd->bd->bi_dram[3].start = gd->bd->bi_dram[2].start; + } + + if (dram_ctrl & 0x80000000) { + /* bank 3 enabled */ + dram_present = (dram_ctrl & 0x7f000000) >> 2; + gd->bd->bi_dram[3].size = dram_present - gd->bd->bi_dram[3].start; + } else { + gd->bd->bi_dram[3].size = 0; + } + + gd->ram_size = dram_present; + + return 0; +} diff --git a/arch/i386/cpu/start.S b/arch/i386/cpu/start.S index df9ca0d..95be5a2 100644 --- a/arch/i386/cpu/start.S +++ b/arch/i386/cpu/start.S @@ -82,29 +82,22 @@ car_init_ret: * starting at CONFIG_SYS_CAR_ADDR to be used as a temporary stack */ movl $CONFIG_SYS_INIT_SP_ADDR, %esp + movl $CONFIG_SYS_INIT_GD_ADDR, %ebp
- /* Skip memory initialization if not starting from cold-reset */ - movl %ebx, %ecx - andl $GD_FLG_COLD_BOOT, %ecx - jz skip_mem_init + /* Set Boot Flags in Global Data */ + movl %ebx, (GD_FLAGS * 4)(%ebp)
- /* size memory */ - call mem_init - -skip_mem_init: - /* fetch memory size (into %eax) */ - call get_mem_size - movl %eax, %esp + /* Determine our load offset (and put in Global Data) */ + call 1f +1: popl %ecx + subl $1b, %ecx + movl %ecx, (GD_LOAD_OFF * 4)(%ebp)
-#if CONFIG_SYS_SDRAM_ECC_ENABLE - /* Skip ECC initialization if not starting from cold-reset */ - movl %ebx, %ecx - andl $GD_FLG_COLD_BOOT, %ecx - jz skip_ecc_init - call init_ecc + /* size memory */ + call dram_init_f
-skip_init_ecc: -#endif + /* Setup stack in SDRAM */ + movl (GD_RAM_SIZE * 4)(%ebp), %esp
/* Test the stack */ pushl $0 @@ -118,21 +111,8 @@ skip_init_ecc:
wbinvd
- /* Determine our load offset */ - call 1f -1: popl %ecx - subl $1b, %ecx - - /* Set the upper memory limit parameter */ - subl $CONFIG_SYS_STACK_SIZE, %eax - - /* Pointer to temporary global data */ - movl $CONFIG_SYS_INIT_GD_ADDR, %edx - - /* %edx points to the global data structure */ - movl %esp, (GD_RAM_SIZE * 4)(%edx) - movl %ebx, (GD_FLAGS * 4)(%edx) - movl %ecx, (GD_LOAD_OFF * 4)(%edx) + /* Set parameter to board_init_f() to boot flags */ + movl (GD_FLAGS * 4)(%ebp), %eax
call board_init_f /* Enter, U-boot! */
diff --git a/arch/i386/include/asm/ic/sc520.h b/arch/i386/include/asm/ic/sc520.h index fe217ea..74a544e 100644 --- a/arch/i386/include/asm/ic/sc520.h +++ b/arch/i386/include/asm/ic/sc520.h @@ -285,6 +285,15 @@ extern volatile sc520_mmcr_t *sc520_mmcr; #define SC520_PAR14 (SC520_PAR0 + (0x04 * 14)) #define SC520_PAR15 (SC520_PAR0 + (0x04 * 15))
+#define SC520_PAR_WRITE_DIS 0x04000000 +#define SC520_PAR_CACHE_DIS 0x08000000 +#define SC520_PAR_EXEC_DIS 0x10000000 + +/* + * Programmable Address Regions to cover 256MB SDRAM (Maximum supported) + * required for DRAM sizing code + */ + /* MMCR Register bits (not all of them :) ) */
/* SSI Stuff */ @@ -315,6 +324,33 @@ extern volatile sc520_mmcr_t *sc520_mmcr; #define UART2_DIS 0x02 /* UART2 Disable */ #define UART1_DIS 0x01 /* UART1 Disable */
+/* + * Defines used for SDRAM Sizing (number of columns and rows) + * Refer to section 10.6.4 - SDRAM Sizing Algorithm in the + * Elan SC520 Microcontroller User's Manual (Order #22004B) + */ +#define CACHELINESZ 0x00000010 + +#define COL11_ADR 0x0e001e00 +#define COL10_ADR 0x0e000e00 +#define COL09_ADR 0x0e000600 +#define COL08_ADR 0x0e000200 +#define COL11_DATA 0x0b0b0b0b +#define COL10_DATA 0x0a0a0a0a +#define COL09_DATA 0x09090909 +#define COL08_DATA 0x08080808 + +#define ROW14_ADR 0x0f000000 +#define ROW13_ADR 0x07000000 +#define ROW12_ADR 0x03000000 +#define ROW11_ADR 0x01000000 +#define ROW10_ADR 0x00000000 +#define ROW14_DATA 0x3f3f3f3f +#define ROW13_DATA 0x1f1f1f1f +#define ROW12_DATA 0x0f0f0f0f +#define ROW11_DATA 0x07070707 +#define ROW10_DATA 0xaaaaaaaa + /* 0x28000000 - 0x3fffffff is used by the flash banks */
/* 0x40000000 - 0xffffffff is not adressable by the SC520 */ diff --git a/arch/i386/lib/board.c b/arch/i386/lib/board.c index 460a5e9..0dcd828 100644 --- a/arch/i386/lib/board.c +++ b/arch/i386/lib/board.c @@ -176,7 +176,7 @@ gd_t *gd; /* * Load U-Boot into RAM, initialize BSS, perform relocation adjustments */ -void board_init_f (ulong mem_top) +void board_init_f (ulong boot_flags) { void *text_start = &__text_start; void *data_end = &__data_end; @@ -194,8 +194,12 @@ void board_init_f (ulong mem_top) Elf32_Rel *re_src; Elf32_Rel *re_end;
+ gd->flags = boot_flags; + /* Calculate destination RAM Address and relocation offset */ - dest_addr = (void *)mem_top - (bss_end - text_start); + dest_addr = (void *)gd->ram_size; + dest_addr -= CONFIG_SYS_STACK_SIZE; + dest_addr -= (bss_end - text_start); rel_offset = text_start - dest_addr;
/* Perform low-level initialization only when cold booted */ diff --git a/board/eNET/eNET.c b/board/eNET/eNET.c index c585771..ae8ce96 100644 --- a/board/eNET/eNET.c +++ b/board/eNET/eNET.c @@ -157,12 +157,6 @@ int board_early_init_r(void) return 0; }
-int dram_init(void) -{ - init_sc520_dram(); - return 0; -} - void show_boot_progress(int val) { uchar led_mask; diff --git a/board/eNET/eNET_start.S b/board/eNET/eNET_start.S index c9e95ee..f920f80 100644 --- a/board/eNET/eNET_start.S +++ b/board/eNET/eNET_start.S @@ -28,16 +28,6 @@ /* board early intialization */ .globl early_board_init early_board_init: - /* Map PAR for first 128MB of RAM */ - movl $SC520_PAR3, %edi - movl $SC520_SDRAM1_PAR, %eax - movl %eax, (%di) - - /* Map PAR for second 128MB of RAM */ - movl $SC520_PAR4, %edi - movl $SC520_SDRAM2_PAR, %eax - movl %eax, (%di) - jmp early_board_init_ret
.globl cpu_halt_asm diff --git a/board/eNET/eNET_start16.S b/board/eNET/eNET_start16.S index 6db72ee..b6f2d63 100644 --- a/board/eNET/eNET_start16.S +++ b/board/eNET/eNET_start16.S @@ -56,11 +56,6 @@ board_init16: movl $CONFIG_SYS_SC520_LLIO_PAR, %eax movl %eax, (%di)
- /* Disable SDRAM write buffer */ - movw $(SC520_DBCTL - SC520_MMCR_BASE), %di - xorw %ax, %ax - movb %al, (%di) - /* Disabe MMCR alias */ movw $0xfffc, %dx movl $0x000000cb, %eax diff --git a/include/configs/eNET.h b/include/configs/eNET.h index 4b9d649..36c10a6 100644 --- a/include/configs/eNET.h +++ b/include/configs/eNET.h @@ -146,11 +146,11 @@ * SDRAM Configuration */ #define CONFIG_SYS_SDRAM_DRCTMCTL 0x18 +#define CONFIG_SYS_SDRAM_REFRESH_RATE 156 #define CONFIG_NR_DRAM_BANKS 4
/* CONFIG_SYS_SDRAM_DRCTMCTL Overrides the following*/ #undef CONFIG_SYS_SDRAM_PRECHARGE_DELAY -#undef CONFIG_SYS_SDRAM_REFRESH_RATE #undef CONFIG_SYS_SDRAM_RAS_CAS_DELAY #undef CONFIG_SYS_SDRAM_CAS_LATENCY_2T #undef CONFIG_SYS_SDRAM_CAS_LATENCY_3T -- 1.7.1.422.g049e9