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Diffstat (limited to 'board/dave/B2/lowlevel_init.S')
| -rwxr-xr-x | board/dave/B2/lowlevel_init.S | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/board/dave/B2/lowlevel_init.S b/board/dave/B2/lowlevel_init.S new file mode 100755 index 0000000..2f3a364 --- /dev/null +++ b/board/dave/B2/lowlevel_init.S @@ -0,0 +1,167 @@ +/* + * (C) Copyright 2004 + * DAVE Srl + * + * http://www.dave-tech.it + * http://www.wawnet.biz + * mailto:info@wawnet.biz + * + * memsetup-sa1110.S (blob): memory setup for various SA1110 architectures + * Modified By MATTO + * + * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) + * + * 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 + * + */ + +/* + * Documentation: + * Intel Corporation, "Intel StrongARM SA-1110 Microprocessor + * Advanced Developer's manual, December 1999 + * + * Intel has a very hard to find SDRAM configurator on their web site: + * http://appzone.intel.com/hcd/sa1110/memory/index.asp + * + * NOTE: This code assumes that an SA1110 CPU *always* uses SDRAM. This + * appears to be true, but it might be possible that somebody designs a + * board with mixed EDODRAM/SDRAM memory (which is a bad idea). -- Erik + * + * 04-10-2001: SELETZ + * - separated memory config for multiple platform support + * - perform SA1110 Hardware Reset Procedure + * + */ + +.equ B0_Tacs, 0x0 /* 0clk */ +.equ B0_Tcos, 0x0 /* 0clk */ +.equ B0_Tacc, 0x4 /* 6clk */ +.equ B0_Tcoh, 0x0 /* 0clk */ +.equ B0_Tah, 0x0 /* 0clk */ +.equ B0_Tacp, 0x0 /* 0clk */ +.equ B0_PMC, 0x0 /* normal(1data) */ +/* Bank 1 parameter */ +.equ B1_Tacs, 0x3 /* 4clk */ +.equ B1_Tcos, 0x3 /* 4clk */ +.equ B1_Tacc, 0x7 /* 14clkv */ +.equ B1_Tcoh, 0x3 /* 4clk */ +.equ B1_Tah, 0x3 /* 4clk */ +.equ B1_Tacp, 0x3 /* 6clk */ +.equ B1_PMC, 0x0 /* normal(1data) */ + +/* Bank 2 parameter - LAN91C96 */ +.equ B2_Tacs, 0x3 /* 4clk */ +.equ B2_Tcos, 0x3 /* 4clk */ +.equ B2_Tacc, 0x7 /* 14clk */ +.equ B2_Tcoh, 0x3 /* 4clk */ +.equ B2_Tah, 0x3 /* 4clk */ +.equ B2_Tacp, 0x3 /* 6clk */ +.equ B2_PMC, 0x0 /* normal(1data) */ + +/* Bank 3 parameter */ +.equ B3_Tacs, 0x3 /* 4clk */ +.equ B3_Tcos, 0x3 /* 4clk */ +.equ B3_Tacc, 0x7 /* 14clk */ +.equ B3_Tcoh, 0x3 /* 4clk */ +.equ B3_Tah, 0x3 /* 4clk */ +.equ B3_Tacp, 0x3 /* 6clk */ +.equ B3_PMC, 0x0 /* normal(1data) */ + +/* Bank 4 parameter */ +.equ B4_Tacs, 0x3 /* 4clk */ +.equ B4_Tcos, 0x3 /* 4clk */ +.equ B4_Tacc, 0x7 /* 14clk */ +.equ B4_Tcoh, 0x3 /* 4clk */ +.equ B4_Tah, 0x3 /* 4clk */ +.equ B4_Tacp, 0x3 /* 6clk */ +.equ B4_PMC, 0x0 /* normal(1data) */ + +/* Bank 5 parameter */ +.equ B5_Tacs, 0x3 /* 4clk */ +.equ B5_Tcos, 0x3 /* 4clk */ +.equ B5_Tacc, 0x7 /* 14clk */ +.equ B5_Tcoh, 0x3 /* 4clk */ +.equ B5_Tah, 0x3 /* 4clk */ +.equ B5_Tacp, 0x3 /* 6clk */ +.equ B5_PMC, 0x0 /* normal(1data) */ + +/* Bank 6(if SROM) parameter */ +.equ B6_Tacs, 0x3 /* 4clk */ +.equ B6_Tcos, 0x3 /* 4clk */ +.equ B6_Tacc, 0x7 /* 14clk */ +.equ B6_Tcoh, 0x3 /* 4clk */ +.equ B6_Tah, 0x3 /* 4clk */ +.equ B6_Tacp, 0x3 /* 6clk */ +.equ B6_PMC, 0x0 /* normal(1data) */ + +/* Bank 7(if SROM) parameter */ +.equ B7_Tacs, 0x3 /* 4clk */ +.equ B7_Tcos, 0x3 /* 4clk */ +.equ B7_Tacc, 0x7 /* 14clk */ +.equ B7_Tcoh, 0x3 /* 4clk */ +.equ B7_Tah, 0x3 /* 4clk */ +.equ B7_Tacp, 0x3 /* 6clk */ +.equ B7_PMC, 0x0 /* normal(1data) */ + +/* Bank 6 parameter */ +.equ B6_MT, 0x3 /* SDRAM */ +.equ B6_Trcd, 0x0 /* 2clk */ +.equ B6_SCAN, 0x0 /* 10bit */ + +.equ B7_MT, 0x3 /* SDRAM */ +.equ B7_Trcd, 0x0 /* 2clk */ +.equ B7_SCAN, 0x0 /* 10bit */ + + +/* REFRESH parameter */ +.equ REFEN, 0x1 /* Refresh enable */ +.equ TREFMD, 0x0 /* CBR(CAS before RAS)/Auto refresh */ +.equ Trp, 0x0 /* 2clk */ +.equ Trc, 0x3 /* 0x1=5clk 0x3=11clk*/ +.equ Tchr, 0x0 /* 0x2=3clk 0x0=0clks */ +.equ REFCNT, 879 + +MEMORY_CONFIG: + .long 0x12111900 /* Bank0 = OM[1:0] , Bank1-7 16bit, Bank2=Nowait,UB/LB*/ + .word ((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC)) /*GCS0*/ + .word ((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC)) /*GCS1*/ + .word ((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC)) /*GCS2*/ + .word ((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC)) /*GCS3*/ + .word ((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC)) /*GCS4*/ + .word ((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC)) /*GCS5*/ + .word ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN)) /*GCS6*/ + .word ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN)) /*GCS7*/ + .word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT) /*REFRESH RFEN=1, TREFMD=0, trp=3clk, trc=5clk, tchr=3clk,count=1019*/ + .word 0x17 /*SCLK power down mode, BANKSIZE 16M/16M*/ + .word 0x20 /*MRSR6 CL=2clk*/ + .word 0x20 /*MRSR7*/ + + +.globl lowlevel_init +lowlevel_init: + + /* + the next instruction fail due memory relocation... + we'll find the right MEMORY_CONFIG address with the next 3 lines... + */ + /*ldr r0, =MEMORY_CONFIG*/ + mov r0, pc + ldr r1, =(0x38+4) + sub r0, r0, r1 + + ldmia r0, {r1-r13} + ldr r0, =0x01c80000 + stmia r0, {r1-r13} + mov pc, lr |