mirror of
https://github.com/AsahiLinux/u-boot
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a55d48174c
MIPS port has two problems in timer routines. One is now we assume CFG_HZ equals to CP0 counter frequency, but this is wrong. CFG_HZ has to be 1000 in the U-Boot system. The other is we don't have a proper time management counter like timestamp other ARCHs have. We need the 32-bit millisecond clock counter. This patch introduces timestamp and CYCLES_PER_JIFFY. timestamp is a 32-bit non-overflowing CFG_HZ counter, and CYCLES_PER_JIFFY is the number of calculated CP0 counter cycles in a CFG_HZ. STRATEGY: * Fix improper CFG_HZ value to have 1000 * Use CFG_MIPS_TIMER_FREQ for timer counter frequency, instead. * timer_init: initialize timestamp and set up the first timer expiration. Note that we don't need to initialize CP0 count/compare registers here as they have been already zeroed out on the system reset. Leave them as they are. * get_timer: calculate how many timestamps have been passed, then return base-relative timestamp. Make sure we can easily count missed timestamps regardless of CP0 count/compare value. * get_ticks: return the current timestamp, that is get_timer(0). Most parts are from good old Linux v2.6.16 kernel. v2: - Remove FIXME comments as they turned out to be trivial. - Use CP0 compare register as a global variable for expirelo. - Kill a global variable 'cycles_per_jiffy'. Use #define CYCLES_PER_JIFFY instead. Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
173 lines
4.5 KiB
C
173 lines
4.5 KiB
C
/*
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* (C) Copyright 2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* This file contains the configuration parameters for qemu-mips target.
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*/
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#ifndef __CONFIG_H
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#define __CONFIG_H
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#define CONFIG_MIPS32 1 /* MIPS32 CPU core */
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#define CONFIG_QEMU_MIPS 1
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#define CONFIG_MISC_INIT_R
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/*IP address is default used by Qemu*/
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#define CONFIG_IPADDR 10.0.2.15 /* Our IP address */
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#define CONFIG_SERVERIP 10.0.2.2 /* Server IP address */
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#define CONFIG_BOOTDELAY 10 /* autoboot after 10 seconds */
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#define CONFIG_BAUDRATE 115200
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/* valid baudrates */
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#define CFG_BAUDRATE_TABLE { 9600, 19200, 38400, 57600, 115200 }
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#define CONFIG_TIMESTAMP /* Print image info with timestamp */
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#undef CONFIG_BOOTARGS
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#define CONFIG_EXTRA_ENV_SETTINGS \
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"addmisc=setenv bootargs ${bootargs} " \
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"console=ttyS0,${baudrate} " \
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"panic=1\0" \
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"bootfile=/tftpboot/vmlinux\0" \
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"load=tftp 80500000 ${u-boot}\0" \
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""
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#define CONFIG_BOOTCOMMAND "bootp;bootelf"
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/*
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* BOOTP options
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*/
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#define CONFIG_BOOTP_BOOTFILESIZE
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#define CONFIG_BOOTP_BOOTPATH
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#define CONFIG_BOOTP_GATEWAY
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#define CONFIG_BOOTP_HOSTNAME
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/*
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* Command line configuration.
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*/
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#include <config_cmd_default.h>
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#define CONFIG_CMD_ELF
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#define CONFIG_CMD_FAT
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#define CONFIG_CMD_EXT2
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#undef CONFIG_CMD_LOADB
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#undef CONFIG_CMD_LOADS
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#define CONFIG_CMD_DHCP
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#define CONFIG_DRIVER_NE2000
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#define CONFIG_DRIVER_NE2000_BASE (0xb4000300)
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#define CFG_NS16550
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#define CFG_NS16550_SERIAL
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#define CFG_NS16550_REG_SIZE 1
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#define CFG_NS16550_CLK 115200
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#define CFG_NS16550_COM1 (0xb40003f8)
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#define CONFIG_CONS_INDEX 1
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#define CONFIG_CMD_IDE
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#define CONFIG_DOS_PARTITION
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#define CFG_IDE_MAXBUS 2
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#define CFG_ATA_IDE0_OFFSET (0x1f0)
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#define CFG_ATA_IDE1_OFFSET (0x170)
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#define CFG_ATA_DATA_OFFSET (0)
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#define CFG_ATA_REG_OFFSET (0)
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#define CFG_ATA_BASE_ADDR (0xb4000000)
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#define CFG_IDE_MAXDEVICE (4)
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/*
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* Miscellaneous configurable options
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*/
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#define CFG_LONGHELP /* undef to save memory */
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#define CFG_PROMPT "qemu-mips # " /* Monitor Command Prompt */
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#define CONFIG_AUTO_COMPLETE
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#define CONFIG_CMDLINE_EDITING
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#define CFG_HUSH_PARSER
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#define CFG_PROMPT_HUSH_PS2 "> "
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#define CFG_CBSIZE 256 /* Console I/O Buffer Size */
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#define CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16) /* Print Buffer Size */
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#define CFG_MAXARGS 16 /* max number of command args */
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#define CFG_MALLOC_LEN 128*1024
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#define CFG_BOOTPARAMS_LEN 128*1024
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#define CFG_MHZ 132
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#define CFG_MIPS_TIMER_FREQ (CFG_MHZ * 1000000)
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#define CFG_HZ 1000
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#define CFG_SDRAM_BASE 0x80000000 /* Cached addr */
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#define CFG_LOAD_ADDR 0x81000000 /* default load address */
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#define CFG_MEMTEST_START 0x80100000
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#define CFG_MEMTEST_END 0x80800000
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/*-----------------------------------------------------------------------
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* FLASH and environment organization
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*/
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/* The following #defines are needed to get flash environment right */
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#define CFG_MONITOR_BASE TEXT_BASE
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#define CFG_MONITOR_LEN (192 << 10)
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#define CFG_INIT_SP_OFFSET 0x400000
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/* We boot from this flash, selected with dip switch */
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#define CFG_FLASH_BASE 0xbfc00000
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#define CFG_MAX_FLASH_BANKS 1
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#define CFG_MAX_FLASH_SECT 128
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#define CFG_FLASH_CFI 1 /* Flash memory is CFI compliant */
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#define CFG_FLASH_CFI_DRIVER 1
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#define CFG_FLASH_USE_BUFFER_WRITE 1
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#define CFG_ENV_IS_IN_FLASH 1
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#define CFG_ENV_ADDR (CFG_FLASH_BASE + 0x40000)
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/* Address and size of Primary Environment Sector */
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#define CFG_ENV_SIZE 0x8000
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#define CONFIG_ENV_OVERWRITE 1
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#undef CONFIG_NET_MULTI
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#define MEM_SIZE 128
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#undef CONFIG_MEMSIZE_IN_BYTES
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/*-----------------------------------------------------------------------
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* Cache Configuration
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*/
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#define CFG_DCACHE_SIZE 16384
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#define CFG_ICACHE_SIZE 16384
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#define CFG_CACHELINE_SIZE 32
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#endif /* __CONFIG_H */
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