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Diffstat (limited to 'board/ns9750dev/lowlevel_init.S')
| -rw-r--r-- | board/ns9750dev/lowlevel_init.S | 298 |
1 files changed, 0 insertions, 298 deletions
diff --git a/board/ns9750dev/lowlevel_init.S b/board/ns9750dev/lowlevel_init.S deleted file mode 100644 index ba5ff81..0000000 --- a/board/ns9750dev/lowlevel_init.S +++ /dev/null @@ -1,298 +0,0 @@ -/* - * Board specific setup info - * - * (C) Copyright 2003 - * Texas Instruments, <www.ti.com> - * Kshitij Gupta <Kshitij@ti.com> - * - * Modified for the NS9750 DevBoard by - * (C) Copyright 2004 by FS Forth-Systeme GmbH. - * Markus Pietrek <mpietrek@fsforth.de> - * @References: [1] NS9750 Hardware Reference/December 2003 - * [2] ns9750_a.cmd from MAJIC configuration - * - * 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 <config.h> -#include <version.h> - -#if defined(CONFIG_NS9750DEV) -# ifndef CONFIG_SKIP_LOWLEVEL_INIT -# include <./ns9750_sys.h> -# include <./ns9750_mem.h> -# endif -#endif - -/*********************************************************************** - * @Function: write_register_block - * @Return: nothing - * @Descr: Copies the register block of register_offset:register value to - * the registers at base r0. The block is assumed to start in RAM at r1 - * and end at r2. The linked RAM base address of U-Boot is assumed to be - * in r5 while the ROM base address we are running from is r6 - * Uses r3 and r4 as tempory registers - ***********************************************************************/ - -.macro write_register_block - @@ map the addresses to high memory - sub r1, r1, r5 - add r1, r1, r6 - sub r2, r2, r5 - add r2, r2, r6 - - @@ copy all -1: - @@ Write register/value pair starting at [r1] to register base r0 - ldr r3, [r1], #4 - ldr r4, [r1], #4 - str r4, [r0,r3] - cmp r1, r2 - blt 1b -.endm - -_TEXT_BASE: - .word CONFIG_SYS_TEXT_BASE @ sdram load addr from config.mk -_PHYS_FLASH: - .word PHYS_FLASH_1 @ real flash address (without mirroring) -_CAS_LATENCY: - .word 0x00022000 @ for CAS2 latency - -#ifndef CONFIG_SKIP_LOWLEVEL_INIT -.globl lowlevel_init -lowlevel_init: - - /* U-Boot may be linked to RAM at 0x780000. But this code will run in - flash from 0x0. But in order to enable RAM we have to disable the - mirror bit, therefore we have to jump to our real flash address - beginning at PHYS_FLASH_1 (CS4 Base). Therefore, - _run_at_real_flash_address may be 0x500003b0 while be linked to - 0x7803b0. So we must modify our linked addresses */ - - @@ branch to high memory address, away from 0x0 - ldr r5, _TEXT_BASE - ldr r6, _PHYS_FLASH - ldr r0, =_run_at_real_flash_address - sub r0, r0, r5 - add r0, r0, r6 - mov pc, r0 - nop @ for pipelining - -_run_at_real_flash_address: - @@ now we are running > PHYS_FLASH_1, safe to enable memory controller - - @@ Write Memory Configuration Registers - - ldr r0, _NS9750_MEM_MODULE_BASE - ldr r1, =_MEM_CONFIG_START - ldr r2, =_MEM_CONFIG_END - - write_register_block - - @@ Give SDRAM some time to settle - @@ @TODO. According to [2] it should be 2 AHB cycles. Check - - ldr r1, =0x50 -_sdram_settle: - subs r1, r1, #1 - bne _sdram_settle - -_enable_mappings: - @@ Enable SDRAM Mode - - ldr r1, =_MEM_MODE_START - ldr r2, =_MEM_MODE_END - - write_register_block - - ldr r3, _CAS_LATENCY @ perform one read from SDRAM - ldr r3, [r3] - - @@ Enable SDRAM and memory mappings - - ldr r1, =_MEM_ENABLE_START - ldr r2, =_MEM_ENABLE_END - - write_register_block - - @@ Activate AHB monitor - - ldr r0, =NS9750_SYS_MODULE_BASE - ldr r1, =_AHB_MONITOR_START - ldr r2, =_AHB_MONITOR_END - - write_register_block -_relocate_lr: - /* lr and ip (from cpu_init_crit) are still based on 0x0, relocate it to - PHYS_FLASH. */ - mov r1, ip - add r1, r1, r6 - mov ip, r1 - - mov r1, lr - add r1, r1, r6 - mov lr, r1 - - @@ back to arch calling code - mov pc, lr - - .ltorg - -_NS9750_MEM_MODULE_BASE: - .word NS9750_MEM_MODULE_BASE - -_MEM_CONFIG_START: - /* Table of 2 32bit entries. First word is register address offset - relative to NS9750_MEM_MODULE_BASE, second one is value. They are - written in order of appearance */ - - @@ Register values taken from [2] - .word NS9750_MEM_CTRL - .word NS9750_MEM_CTRL_E - - .word NS9750_MEM_DYN_REFRESH - .word (0x6 & NS9750_MEM_DYN_REFRESH_MA) - - .word NS9750_MEM_DYN_READ_CFG - .word (0x1 & NS9750_MEM_DYN_READ_CFG_MA) - - .word NS9750_MEM_DYN_TRP - .word (0x1 & NS9750_MEM_DYN_TRP_MA) - - .word NS9750_MEM_DYN_TRAS - .word (0x4 & NS9750_MEM_DYN_TRAS_MA) - - .word NS9750_MEM_DYN_TAPR - .word (0x1 & NS9750_MEM_DYN_TRAS_MA) - - .word NS9750_MEM_DYN_TDAL - .word (0x5 & NS9750_MEM_DYN_TDAL_MA) - - .word NS9750_MEM_DYN_TWR - .word (0x1 & NS9750_MEM_DYN_TWR_MA) - - .word NS9750_MEM_DYN_TRC - .word (0x6 & NS9750_MEM_DYN_TRC_MA) - - .word NS9750_MEM_DYN_TRFC - .word (0x6 & NS9750_MEM_DYN_TRFC_MA) - - .word NS9750_MEM_DYN_TRRD - .word (0x1 & NS9750_MEM_DYN_TRRD_MA) - - .word NS9750_MEM_DYN_TMRD - .word (0x1 & NS9750_MEM_DYN_TMRD_MA) - - @@ CS 4 - .word NS9750_MEM_DYN_CFG(0) - .word (NS9750_MEM_DYN_CFG_AM | \ - (0x280 & NS9750_MEM_DYN_CFG_AM_MA)) - - .word NS9750_MEM_DYN_RAS_CAS(0) - .word ((0x200 & NS9750_MEM_DYN_RAS_CAS_CAS_MA) | \ - (0x03 & NS9750_MEM_DYN_RAS_CAS_RAS_MA)) - - @@ CS 5 - .word NS9750_MEM_DYN_CFG(1) - .word (NS9750_MEM_DYN_CFG_AM | \ - (0x280 & NS9750_MEM_DYN_CFG_AM_MA)) - - .word NS9750_MEM_DYN_RAS_CAS(1) - .word ((0x200 & NS9750_MEM_DYN_RAS_CAS_CAS_MA) | \ - (0x03 & NS9750_MEM_DYN_RAS_CAS_RAS_MA)) - - @@ CS 6 - .word NS9750_MEM_DYN_CFG(2) - .word (NS9750_MEM_DYN_CFG_AM | \ - (0x280 & NS9750_MEM_DYN_CFG_AM_MA)) - - .word NS9750_MEM_DYN_RAS_CAS(2) - .word ((0x200 & NS9750_MEM_DYN_RAS_CAS_CAS_MA) | \ - (0x03 & NS9750_MEM_DYN_RAS_CAS_RAS_MA)) - - @@ CS 7 - .word NS9750_MEM_DYN_CFG(3) - .word (NS9750_MEM_DYN_CFG_AM | \ - (0x280 & NS9750_MEM_DYN_CFG_AM_MA)) - - .word NS9750_MEM_DYN_RAS_CAS(3) - .word ((0x200 & NS9750_MEM_DYN_RAS_CAS_CAS_MA) | \ - (0x03 & NS9750_MEM_DYN_RAS_CAS_RAS_MA)) - - .word NS9750_MEM_DYN_CTRL - .word (NS9750_MEM_DYN_CTRL_I_PALL | \ - NS9750_MEM_DYN_CTRL_SR | \ - NS9750_MEM_DYN_CTRL_CE ) - - .word NS9750_MEM_DYN_REFRESH - .word (0x1 & NS9750_MEM_DYN_REFRESH_MA) - @@ No further register settings after refresh -_MEM_CONFIG_END: - -_MEM_MODE_START: - .word NS9750_MEM_DYN_REFRESH - .word (0x30 & NS9750_MEM_DYN_REFRESH_MA) - - .word NS9750_MEM_DYN_CTRL - .word (NS9750_MEM_DYN_CTRL_I_MODE | \ - NS9750_MEM_DYN_CTRL_SR | \ - NS9750_MEM_DYN_CTRL_CE ) -_MEM_MODE_END: - -_MEM_ENABLE_START: - .word NS9750_MEM_DYN_CTRL - .word (NS9750_MEM_DYN_CTRL_I_NORMAL | \ - NS9750_MEM_DYN_CTRL_SR | \ - NS9750_MEM_DYN_CTRL_CE ) - - @@ CS 4 - .word NS9750_MEM_DYN_CFG(0) - .word (NS9750_MEM_DYN_CFG_BDMC | \ - NS9750_MEM_DYN_CFG_AM | \ - (0x280 & NS9750_MEM_DYN_CFG_AM_MA)) - - @@ CS 5 - .word NS9750_MEM_DYN_CFG(1) - .word (NS9750_MEM_DYN_CFG_BDMC | \ - NS9750_MEM_DYN_CFG_AM | \ - (0x280 & NS9750_MEM_DYN_CFG_AM_MA)) - - @@ CS 6 - .word NS9750_MEM_DYN_CFG(2) - .word (NS9750_MEM_DYN_CFG_BDMC | \ - NS9750_MEM_DYN_CFG_AM | \ - (0x280 & NS9750_MEM_DYN_CFG_AM_MA)) - - @@ CS 7 - .word NS9750_MEM_DYN_CFG(3) - .word (NS9750_MEM_DYN_CFG_BDMC | \ - NS9750_MEM_DYN_CFG_AM | \ - (0x280 & NS9750_MEM_DYN_CFG_AM_MA)) -_MEM_ENABLE_END: - -_AHB_MONITOR_START: - .word NS9750_SYS_AHB_TIMEOUT - .word 0x01000100 @ @TODO not calculated yet - - .word NS9750_SYS_AHB_MON - .word (NS9750_SYS_AHB_MON_BMTC_GEN_IRQ | \ - NS9750_SYS_AHB_MON_BATC_GEN_IRQ) -_AHB_MONITOR_END: - -#endif /* CONFIG_SKIP_LOWLEVEL_INIT */ |