diff options
Diffstat (limited to 'board')
| -rw-r--r-- | board/evb4510/Makefile | 51 | ||||
| -rw-r--r-- | board/evb4510/config.mk | 27 | ||||
| -rw-r--r-- | board/evb4510/evb4510.c | 64 | ||||
| -rw-r--r-- | board/evb4510/flash.c | 539 | ||||
| -rw-r--r-- | board/evb4510/lowlevel_init.S | 157 |
5 files changed, 0 insertions, 838 deletions
diff --git a/board/evb4510/Makefile b/board/evb4510/Makefile deleted file mode 100644 index 102eade..0000000 --- a/board/evb4510/Makefile +++ /dev/null @@ -1,51 +0,0 @@ -# -# (C) Copyright 2000-2006 -# Wolfgang Denk, DENX Software Engineering, wd@denx.de. -# -# 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 $(TOPDIR)/config.mk - -LIB = $(obj)lib$(BOARD).o - -COBJS := evb4510.o flash.o -SOBJS := lowlevel_init.o - -SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) -OBJS := $(addprefix $(obj),$(COBJS)) -SOBJS := $(addprefix $(obj),$(SOBJS)) - -$(LIB): $(obj).depend $(OBJS) $(SOBJS) - $(call cmd_link_o_target, $(OBJS) $(SOBJS)) - -clean: - rm -f $(SOBJS) $(OBJS) - -distclean: clean - rm -f $(LIB) core *.bak $(obj).depend - -######################################################################### - -# defines $(obj).depend target -include $(SRCTREE)/rules.mk - -sinclude $(obj).depend - -######################################################################### diff --git a/board/evb4510/config.mk b/board/evb4510/config.mk deleted file mode 100644 index 140c989..0000000 --- a/board/evb4510/config.mk +++ /dev/null @@ -1,27 +0,0 @@ -# -# Copyright (c) 2004 Cucy Systems (http://www.cucy.com) -# Curt Brune <curt@cucy.com> -# -# (C) Copyright 2000-2004 -# Wolfgang Denk, DENX Software Engineering, wd@denx.de. -# -# 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 -# - -CONFIG_SYS_TEXT_BASE = 0x007d0000 diff --git a/board/evb4510/evb4510.c b/board/evb4510/evb4510.c deleted file mode 100644 index 13abbb7..0000000 --- a/board/evb4510/evb4510.c +++ /dev/null @@ -1,64 +0,0 @@ -/* - * Copyright (c) 2004 Cucy Systems (http://www.cucy.com) - * Curt Brune <curt@cucy.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/hardware.h> -#include <command.h> - -DECLARE_GLOBAL_DATA_PTR; - -#ifdef CONFIG_EVB4510 - -/* ------------------------------------------------------------------------- */ - -/* - * Miscelaneous platform dependent initialisations - */ - -int board_init (void) -{ - icache_enable(); - - /* address for the kernel command line */ - gd->bd->bi_boot_params = 0x800; - - /* enable board LEDs for output */ - PUT_REG( REG_IOPDATA, 0x0); - PUT_REG( REG_IOPMODE, 0xFFFF); - PUT_REG( REG_IOPDATA, 0xFF); - - return 0; -} - -int dram_init (void) -{ - gd->bd->bi_dram[0].start = PHYS_SDRAM_1; - gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE; -#if CONFIG_NR_DRAM_BANKS == 2 - gd->bd->bi_dram[1].start = PHYS_SDRAM_2; - gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE; -#endif - return 0; -} - -#endif diff --git a/board/evb4510/flash.c b/board/evb4510/flash.c deleted file mode 100644 index c9c6e02..0000000 --- a/board/evb4510/flash.c +++ /dev/null @@ -1,539 +0,0 @@ -/* - * - * Copyright (c) 2004 Cucy Systems (http://www.cucy.com) - * Curt Brune <curt@cucy.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/hardware.h> -#include <flash.h> - -flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; - -typedef enum { - FLASH_DEV_U9_512KB = 0, - FLASH_DEV_U7_2MB = 1 -} FLASH_DEV; - -#define FLASH_DQ7 (0x80) -#define FLASH_DQ5 (0x20) - -#define PROG_ADDR (0xAAA) -#define SETUP_ADDR (0xAAA) -#define ID_ADDR (0xAAA) -#define UNLOCK_ADDR1 (0xAAA) -#define UNLOCK_ADDR2 (0x555) - -#define UNLOCK_CMD1 (0xAA) -#define UNLOCK_CMD2 (0x55) -#define ERASE_SUSPEND_CMD (0xB0) -#define ERASE_RESUME_CMD (0x30) -#define RESET_CMD (0xF0) -#define ID_CMD (0x90) -#define SELECT_CMD (0x90) -#define CHIPERASE_CMD (0x10) -#define BYPASS_CMD (0x20) -#define SECERASE_CMD (0x30) -#define PROG_CMD (0xa0) -#define SETUP_CMD (0x80) - -#if 0 -#define WRITE_UNLOCK(addr) { \ - PUT__U8( addr + UNLOCK_ADDR1, UNLOCK_CMD1); \ - PUT__U8( addr + UNLOCK_ADDR2, UNLOCK_CMD2); \ -} - -/* auto select command */ -#define CMD_ID(addr) WRITE_UNLOCK(addr); { \ - PUT__U8( addr + ID_ADDR, ID_CMD); \ -} - -#define CMD_RESET(addr) WRITE_UNLOCK(addr); { \ - PUT__U8( addr + ID_ADDR, RESET_CMD); \ -} - -#define CMD_ERASE_SEC(base, addr) WRITE_UNLOCK(base); \ - PUT__U8( base + SETUP_ADDR, SETUP_CMD); \ - WRITE_UNLOCK(base); \ - PUT__U8( addr, SECERASE_CMD); - -#define CMD_ERASE_CHIP(base) WRITE_UNLOCK(base); \ - PUT__U8( base + SETUP_ADDR, SETUP_CMD); \ - WRITE_UNLOCK(base); \ - PUT__U8( base + SETUP_ADDR, CHIPERASE_CMD); - -/* prepare for bypass programming */ -#define CMD_UNLOCK_BYPASS(addr) WRITE_UNLOCK(addr); { \ - PUT__U8( addr + ID_ADDR, 0x20); \ -} - -/* terminate bypass programming */ -#define CMD_BYPASS_RESET(addr) { \ - PUT__U8(addr, 0x90); \ - PUT__U8(addr, 0x00); \ -} -#endif - -inline static void FLASH_CMD_UNLOCK (FLASH_DEV dev, u32 base) -{ - switch (dev) { - case FLASH_DEV_U7_2MB: - PUT__U8 (base + 0xAAA, 0xAA); - PUT__U8 (base + 0x555, 0x55); - break; - case FLASH_DEV_U9_512KB: - PUT__U8 (base + 0x555, 0xAA); - PUT__U8 (base + 0x2AA, 0x55); - break; - } -} - -inline static void FLASH_CMD_SELECT (FLASH_DEV dev, u32 base) -{ - switch (dev) { - case FLASH_DEV_U7_2MB: - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base + 0xAAA, SELECT_CMD); - break; - case FLASH_DEV_U9_512KB: - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base + 0x555, SELECT_CMD); - break; - } -} - -inline static void FLASH_CMD_RESET (FLASH_DEV dev, u32 base) -{ - switch (dev) { - case FLASH_DEV_U7_2MB: - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base + 0xAAA, RESET_CMD); - break; - case FLASH_DEV_U9_512KB: - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base + 0x555, RESET_CMD); - break; - } -} - -inline static void FLASH_CMD_ERASE_SEC (FLASH_DEV dev, u32 base, u32 addr) -{ - switch (dev) { - case FLASH_DEV_U7_2MB: - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base + 0xAAA, SETUP_CMD); - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (addr, SECERASE_CMD); - break; - case FLASH_DEV_U9_512KB: - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base + 0x555, SETUP_CMD); - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (addr, SECERASE_CMD); - break; - } -} - -inline static void FLASH_CMD_ERASE_CHIP (FLASH_DEV dev, u32 base) -{ - switch (dev) { - case FLASH_DEV_U7_2MB: - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base + 0xAAA, SETUP_CMD); - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base, CHIPERASE_CMD); - break; - case FLASH_DEV_U9_512KB: - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base + 0x555, SETUP_CMD); - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base, CHIPERASE_CMD); - break; - } -} - -inline static void FLASH_CMD_UNLOCK_BYPASS (FLASH_DEV dev, u32 base) -{ - switch (dev) { - case FLASH_DEV_U7_2MB: - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base + 0xAAA, BYPASS_CMD); - break; - case FLASH_DEV_U9_512KB: - FLASH_CMD_UNLOCK (dev, base); - PUT__U8 (base + 0x555, BYPASS_CMD); - break; - } -} - -inline static void FLASH_CMD_BYPASS_RESET (FLASH_DEV dev, u32 base) -{ - PUT__U8 (base, SELECT_CMD); - PUT__U8 (base, 0x0); -} - -/* poll for flash command completion */ -static u16 _flash_poll (FLASH_DEV dev, u32 addr, u16 data, ulong timeOut) -{ - u32 done = 0; - ulong t0; - - u16 error = 0; - volatile u16 flashData; - - data = data & 0xFF; - t0 = get_timer (0); - while (get_timer (t0) < timeOut) { - /* for( i = 0; i < POLL_LOOPS; i++) { */ - /* Read the Data */ - flashData = GET__U8 (addr); - - /* FLASH_DQ7 = Data? */ - if ((flashData & FLASH_DQ7) == (data & FLASH_DQ7)) { - done = 1; - break; - } - - /* Check Timeout (FLASH_DQ5==1) */ - if (flashData & FLASH_DQ5) { - /* Read the Data */ - flashData = GET__U8 (addr); - - /* FLASH_DQ7 = Data? */ - if (!((flashData & FLASH_DQ7) == (data & FLASH_DQ7))) { - printf ("_flash_poll(): FLASH_DQ7 & flashData not equal to write value\n"); - error = ERR_PROG_ERROR; - } - FLASH_CMD_RESET (dev, addr); - done = 1; - break; - } - /* spin delay */ - udelay (10); - } - - - /* error update */ - if (!done) { - printf ("_flash_poll(): Timeout\n"); - error = ERR_TIMOUT; - } - - /* Check the data */ - if (!error) { - /* Read the Data */ - flashData = GET__U8 (addr); - if (flashData != data) { - error = ERR_PROG_ERROR; - printf ("_flash_poll(): flashData(0x%04x) not equal to data(0x%04x)\n", - flashData, data); - } - } - - return error; -} - -/*----------------------------------------------------------------------- - */ -static int _flash_check_protection (flash_info_t * info, int s_first, int s_last) -{ - int sect, prot = 0; - - for (sect = s_first; sect <= s_last; sect++) - if (info->protect[sect]) { - printf (" Flash sector %d protected.\n", sect); - prot++; - } - return prot; -} - -static int _detectFlash (FLASH_DEV dev, u32 base, u8 venId, u8 devId) -{ - - u32 baseAddr = base | CACHE_DISABLE_MASK; - u8 vendorId, deviceId; - - /* printf(__FUNCTION__"(): detecting flash @ 0x%08x\n", base); */ - - /* Send auto select command and read manufacturer info */ - FLASH_CMD_SELECT (dev, baseAddr); - vendorId = GET__U8 (baseAddr); - FLASH_CMD_RESET (dev, baseAddr); - - /* Send auto select command and read device info */ - FLASH_CMD_SELECT (dev, baseAddr); - - if (dev == FLASH_DEV_U7_2MB) { - deviceId = GET__U8 (baseAddr + 2); - } else if (dev == FLASH_DEV_U9_512KB) { - deviceId = GET__U8 (baseAddr + 1); - } else { - return 0; - } - - FLASH_CMD_RESET (dev, baseAddr); - - /* printf (__FUNCTION__"(): found vendorId 0x%04x, deviceId 0x%04x\n", - vendorId, deviceId); - */ - - return (vendorId == venId) && (deviceId == devId); - -} - -/****************************************************************************** - * - * Public u-boot interface functions below - * - *****************************************************************************/ - -/*************************************************************************** - * - * Flash initialization - * - * This board has two banks of flash, but the base addresses depend on - * how the board is jumpered. - * - * The two flash types are: - * - * AMD Am29LV160DB (2MB) sectors layout 16KB, 2x8KB, 32KB, 31x64KB - * - * AMD Am29LV040B (512KB) sectors: 8x64KB - *****************************************************************************/ - -unsigned long flash_init (void) -{ - flash_info_t *info; - u16 i; - u32 flashtest; - s16 amd160 = -1; - u32 amd160base = 0; - -#if CONFIG_SYS_MAX_FLASH_BANKS == 2 - s16 amd040 = -1; - u32 amd040base = 0; -#endif - - /* configure PHYS_FLASH_1 */ - if (_detectFlash (FLASH_DEV_U7_2MB, PHYS_FLASH_1, 0x1, 0x49)) { - amd160 = 0; - amd160base = PHYS_FLASH_1; -#if CONFIG_SYS_MAX_FLASH_BANKS == 1 - } -#else - if (_detectFlash - (FLASH_DEV_U9_512KB, PHYS_FLASH_2, 0x1, 0x4F)) { - amd040 = 1; - amd040base = PHYS_FLASH_2; - } else { - printf (__FUNCTION__ - "(): Unable to detect PHYS_FLASH_2: 0x%08x\n", - PHYS_FLASH_2); - } - } else if (_detectFlash (FLASH_DEV_U9_512KB, PHYS_FLASH_1, 0x1, 0x4F)) { - amd040 = 0; - amd040base = PHYS_FLASH_1; - if (_detectFlash (FLASH_DEV_U7_2MB, PHYS_FLASH_2, 0x1, 0x49)) { - amd160 = 1; - amd160base = PHYS_FLASH_2; - } else { - printf (__FUNCTION__ - "(): Unable to detect PHYS_FLASH_2: 0x%08x\n", - PHYS_FLASH_2); - } - } -#endif - else { - printf ("flash_init(): Unable to detect PHYS_FLASH_1: 0x%08x\n", - PHYS_FLASH_1); - } - - /* Configure AMD Am29LV160DB (2MB) */ - info = &flash_info[amd160]; - info->flash_id = FLASH_DEV_U7_2MB; - info->sector_count = 35; - info->size = 2 * 1024 * 1024; /* 2MB */ - /* 1*16K Boot Block - 2*8K Parameter Block - 1*32K Small Main Block */ - info->start[0] = amd160base; - info->start[1] = amd160base + 0x4000; - info->start[2] = amd160base + 0x6000; - info->start[3] = amd160base + 0x8000; - for (i = 1; i < info->sector_count; i++) - info->start[3 + i] = amd160base + i * (64 * 1024); - - for (i = 0; i < info->sector_count; i++) { - /* Write auto select command sequence and query sector protection */ - FLASH_CMD_SELECT (info->flash_id, - info->start[i] | CACHE_DISABLE_MASK); - flashtest = - GET__U8 (((info->start[i] + 4) | CACHE_DISABLE_MASK)); - FLASH_CMD_RESET (info->flash_id, - amd160base | CACHE_DISABLE_MASK); - info->protect[i] = (flashtest & 0x0001); - } - - /* - * protect monitor and environment sectors in 2MB flash - */ - flash_protect (FLAG_PROTECT_SET, - amd160base, amd160base + monitor_flash_len - 1, info); - - flash_protect (FLAG_PROTECT_SET, - CONFIG_ENV_ADDR, CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, info); - -#if CONFIG_SYS_MAX_FLASH_BANKS == 2 - /* Configure AMD Am29LV040B (512KB) */ - info = &flash_info[amd040]; - info->flash_id = FLASH_DEV_U9_512KB; - info->sector_count = 8; - info->size = 512 * 1024; /* 512KB, 8 x 64KB */ - for (i = 0; i < info->sector_count; i++) { - info->start[i] = amd040base + i * (64 * 1024); - /* Write auto select command sequence and query sector protection */ - FLASH_CMD_SELECT (info->flash_id, - info->start[i] | CACHE_DISABLE_MASK); - flashtest = - GET__U8 (((info->start[i] + 2) | CACHE_DISABLE_MASK)); - FLASH_CMD_RESET (info->flash_id, - amd040base | CACHE_DISABLE_MASK); - info->protect[i] = (flashtest & 0x0001); - } -#endif - - return flash_info[0].size -#if CONFIG_SYS_MAX_FLASH_BANKS == 2 - + flash_info[1].size -#endif - ; -} - -void flash_print_info (flash_info_t * info) -{ - int i; - - if (info->flash_id == FLASH_DEV_U7_2MB) { - printf ("AMD Am29LV160DB (2MB) 16KB,2x8KB,32KB,31x64KB\n"); - } else if (info->flash_id == FLASH_DEV_U9_512KB) { - printf ("AMD Am29LV040B (512KB) 8x64KB\n"); - } else { - printf ("Unknown flash_id ...\n"); - return; - } - - printf (" Size: %ld KB in %d Sectors\n", - info->size >> 10, info->sector_count); - printf (" Sector Start Addresses:"); - for (i = 0; i < info->sector_count; i++) { - if ((i % 4) == 0) - printf ("\n "); - printf (" S%02d @ 0x%08lX%s", i, - info->start[i], info->protect[i] ? " !" : " "); - } - printf ("\n"); -} - -int flash_erase (flash_info_t * info, int s_first, int s_last) -{ - u16 i, error = 0; - - printf ("\n"); - - /* check flash protection bits */ - if (_flash_check_protection (info, s_first, s_last)) { - printf (" Flash erase aborted due to protected sectors\n"); - return ERR_PROTECTED; - } - - if ((s_first < info->sector_count) && (s_first <= s_last)) { - for (i = s_first; i <= s_last && !error; i++) { - printf (" Erasing Sector %d @ 0x%08lx ... ", i, - info->start[i]); - /* bypass the cache to access the flash memory */ - FLASH_CMD_ERASE_SEC (info->flash_id, - (info-> - start[0] | CACHE_DISABLE_MASK), - (info-> - start[i] | CACHE_DISABLE_MASK)); - /* look for sector to become 0xFF after erase */ - error = _flash_poll (info->flash_id, - info-> - start[i] | CACHE_DISABLE_MASK, - 0xFF, CONFIG_SYS_FLASH_ERASE_TOUT); - FLASH_CMD_RESET (info->flash_id, - (info-> - start[0] | CACHE_DISABLE_MASK)); - printf ("done\n"); - if (error) { - break; - } - } - } else - error = ERR_INVAL; - - return error; -} - -int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt) -{ - u16 error = 0, i; - u32 n; - u8 *bp, *bps; - - /* Write Setup */ - /* bypass the cache to access the flash memory */ - FLASH_CMD_UNLOCK_BYPASS (info->flash_id, - (info->start[0] | CACHE_DISABLE_MASK)); - - /* Write the Data to Flash */ - - bp = (u8 *) (addr | CACHE_DISABLE_MASK); - bps = (u8 *) src; - - for (n = 0; n < cnt && !error; n++, bp++, bps++) { - - if (!(n % (cnt / 15))) { - printf ("."); - } - - /* write the flash command for flash memory */ - *bp = 0xA0; - - /* Write the data */ - *bp = *bps; - - /* Check if the write is done */ - for (i = 0; i < 0xff; i++); - error = _flash_poll (info->flash_id, (u32) bp, *bps, - CONFIG_SYS_FLASH_WRITE_TOUT); - if (error) { - return error; - } - } - - /* Reset the Flash Mode to read */ - FLASH_CMD_BYPASS_RESET (info->flash_id, info->start[0]); - - printf (" "); - - return error; -} diff --git a/board/evb4510/lowlevel_init.S b/board/evb4510/lowlevel_init.S deleted file mode 100644 index 7184d72..0000000 --- a/board/evb4510/lowlevel_init.S +++ /dev/null @@ -1,157 +0,0 @@ -/* - * Copyright (c) 2004 Cucy Systems (http://www.cucy.com) - * Curt Brune <curt@cucy.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 <config.h> -#include <version.h> -#include <asm/hardware.h> - -/*********************************************************************** - * Configure Memory Map - * - * This memory map allows us to relocate from FLASH to SRAM. After - * power-on reset the CPU only knows about the FLASH memory at address - * 0x00000000. After lowlevel_init completes the memory map will be: - * - * Memory Addr - * 0x00000000 - * to 8MB SRAM (U5) -- 8MB Map - * 0x00800000 - * - * 0x01000000 - * to 2MB Flash @ 0x00000000 (U7) -- 2MB Map - * 0x01200000 - * - * 0x02000000 - * to 512KB Flash @ 0x02000000 (U9) -- 2MB Map - * 0x02080000 - * - * Load all 12 memory registers with the STMIA instruction since - * memory access is disabled once these registers are written. The - * last register written re-enables memory access. For more info see - * the user's manual for the S3C4510B, available from Samsung's web - * site. Search for part number "S3C4510B". - * - ***********************************************************************/ - -.globl lowlevel_init -lowlevel_init: - - /* preserve the temp register (r12 AKA ip) and remap it. */ - ldr r1, =SRAM_BASE+0xC - add r0, r12, #0x01000000 - str r0, [r1] - - /* remap the link register for when we return */ - add lr, lr, #0x01000000 - - /* store a short program in the on chip SRAM, which is - * unaffected when remapping memory. Note the cache must be - * disabled for the on chip SRAM to be available. - */ - ldr r1, =SRAM_BASE - ldr r0, =0xe8801ffe /* stmia r0, {r1-r12} */ - str r0, [r1] - add r1, r1, #4 - ldr r0, =0xe59fc000 /* ldr r12, [pc, #0] */ - str r0, [r1] - add r1, r1, #4 - ldr r0, =0xe1a0f00e /* mov pc, lr */ - str r0, [r1] - - adr r0, memory_map_data - ldmia r0, {r1-r12} - ldr r0, =REG_EXTDBWTH - - ldr pc, =SRAM_BASE - -.globl reset_cpu -reset_cpu: - /* - * reset the cpu by re-mapping FLASH 0 to 0x0 and jumping to - * address 0x0. We accomplish this by storing a few - * instructions into the on chip SRAM (8KB) and run from - * there. Note the cache must be disabled for the on chip - * SRAM to be available. - * - * load r2 with REG_ROMCON0 - * load r3 with 0x12040060 configure FLASH bank 0 @ 0x00000000 - * load r4 with REG_DRAMCON0 - * load r5 with 0x08000380 configure RAM bank 0 @ 0x01000000 - * load r6 with REG_REFEXTCON - * load r7 with 0x9c218360 - * load r8 with 0x0 - * store str r3,[r2] @ SRAM_BASE - * store str r5,[r4] @ SRAM_BASE + 0x4 - * store str r7,[r6] @ SRAM_BASE + 0x8 - * store mov pc,r8 @ SRAM_BASE + 0xC - * mov pc, SRAM_BASE - * - */ - - /* disable cache */ - ldr r0, =REG_SYSCFG - ldr r1, =0x83ffffa0 /* cache-disabled */ - str r1, [r0] - - ldr r2, =REG_ROMCON0 - ldr r3, =0x02000060 /* Bank0 2MB FLASH @ 0x00000000 */ - ldr r4, =REG_DRAMCON0 - ldr r5, =0x18040380 /* DRAM0 8MB SRAM @ 0x01000000 */ - ldr r6, =REG_REFEXTCON - ldr r7, =0xce278360 - ldr r8, =0x00000000 - ldr r1, =SRAM_BASE - ldr r0, =0xe5823000 /* str r3, [r2] */ - str r0, [r1] - ldr r1, =SRAM_BASE+4 - ldr r0, =0xe5845000 /* str r5, [r4] */ - str r0, [r1] - ldr r1, =SRAM_BASE+8 - ldr r0, =0xe5867000 /* str r7, [r6] */ - str r0, [r1] - ldr r1, =SRAM_BASE+0xC - ldr r0, =0xe1a0f008 /* mov pc, r8 */ - str r0, [r1] - ldr r1, =SRAM_BASE - mov pc, r1 - - /* never return */ - -/************************************************************************ - * Below are twelve 32-bit values for the twelve memory registers of - * the system manager, starting with register REG_EXTDBWTH. - ***********************************************************************/ -memory_map_data: - .long 0x00f03005 /* memory widths */ - .long 0x12040060 /* Bank0 2MB FLASH @ 0x01000000 */ - .long 0x22080060 /* Bank1 512KB FLASH @ 0x02000000 */ - .long 0x00000000 - .long 0x00000000 - .long 0x00000000 - .long 0x00000000 - .long 0x08000380 /* DRAM0 8MB SRAM @ 0x00000000 */ - .long 0x00000000 - .long 0x00000000 - .long 0x00000000 - .long 0x9c218360 /* enable memory */ |