u-boot/include/configs/incaip.h
Shinya Kuribayashi a55d48174c [MIPS] lib_mips/time.c: Fix CP0 count register usage and timer routines
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>
2008-06-05 22:29:00 +09:00

195 lines
5.5 KiB
C

/*
* (C) Copyright 2003-2005
* 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
*/
/*
* This file contains the configuration parameters for the INCA-IP board.
*/
#ifndef __CONFIG_H
#define __CONFIG_H
#define CONFIG_MIPS32 1 /* MIPS 4Kc CPU core */
#define CONFIG_INCA_IP 1 /* on a INCA-IP Board */
#ifndef CPU_CLOCK_RATE
/* allowed values: 100000000, 133000000, and 150000000 */
#define CPU_CLOCK_RATE 150000000 /* default: 150 MHz clock for the MIPS core */
#endif
#define INFINEON_EBU_BOOTCFG 0x40C4 /* CMULT = 8 */
#define CONFIG_BOOTDELAY 5 /* autoboot after 5 seconds */
#define CONFIG_BAUDRATE 115200
/* valid baudrates */
#define CFG_BAUDRATE_TABLE { 9600, 19200, 38400, 57600, 115200 }
#define CONFIG_TIMESTAMP /* Print image info with timestamp */
#define CONFIG_PREBOOT "echo;" \
"echo Type \\\"run flash_nfs\\\" to mount root filesystem over NFS;" \
"echo"
#undef CONFIG_BOOTARGS
#define CONFIG_EXTRA_ENV_SETTINGS \
"nfsargs=setenv bootargs root=/dev/nfs rw " \
"nfsroot=${serverip}:${rootpath}\0" \
"ramargs=setenv bootargs root=/dev/ram rw\0" \
"addip=setenv bootargs ${bootargs} " \
"ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}" \
":${hostname}:${netdev}:off\0" \
"addmisc=setenv bootargs ${bootargs} " \
"console=ttyS0,${baudrate} " \
"ethaddr=${ethaddr} " \
"panic=1\0" \
"flash_nfs=run nfsargs addip addmisc;" \
"bootm ${kernel_addr}\0" \
"flash_self=run ramargs addip addmisc;" \
"bootm ${kernel_addr} ${ramdisk_addr}\0" \
"net_nfs=tftp 80500000 ${bootfile};" \
"run nfsargs addip addmisc;bootm\0" \
"rootpath=/opt/eldk/mips_4KC\0" \
"bootfile=/tftpboot/INCA/uImage\0" \
"kernel_addr=B0040000\0" \
"ramdisk_addr=B0100000\0" \
"u-boot=/tftpboot/INCA/u-boot.bin\0" \
"load=tftp 80500000 ${u-boot}\0" \
"update=protect off 1:0-2;era 1:0-2;" \
"cp.b 80500000 B0000000 ${filesize}\0" \
""
#define CONFIG_BOOTCOMMAND "run flash_self"
/*
* BOOTP options
*/
#define CONFIG_BOOTP_BOOTFILESIZE
#define CONFIG_BOOTP_BOOTPATH
#define CONFIG_BOOTP_GATEWAY
#define CONFIG_BOOTP_HOSTNAME
/*
* Command line configuration.
*/
#include <config_cmd_default.h>
#define CONFIG_CMD_ASKENV
#define CONFIG_CMD_DHCP
#define CONFIG_CMD_ELF
#define CONFIG_CMD_JFFS2
#define CONFIG_CMD_NFS
#define CONFIG_CMD_PING
#define CONFIG_CMD_SNTP
/*
* Miscellaneous configurable options
*/
#define CFG_LONGHELP /* undef to save memory */
#define CFG_PROMPT "INCA-IP # " /* Monitor Command Prompt */
#define CFG_CBSIZE 256 /* Console I/O Buffer Size */
#define CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16) /* Print Buffer Size */
#define CFG_MAXARGS 16 /* max number of command args*/
#define CFG_MALLOC_LEN 128*1024
#define CFG_BOOTPARAMS_LEN 128*1024
#define CFG_MIPS_TIMER_FREQ (incaip_get_cpuclk() / 2)
#define CFG_HZ 1000
#define CFG_SDRAM_BASE 0x80000000
#define CFG_LOAD_ADDR 0x80100000 /* default load address */
#define CFG_MEMTEST_START 0x80100000
#define CFG_MEMTEST_END 0x80800000
/*-----------------------------------------------------------------------
* FLASH and environment organization
*/
#define CFG_MAX_FLASH_BANKS 2 /* max number of memory banks */
#define CFG_MAX_FLASH_SECT (128) /* max number of sectors on one chip */
#define PHYS_FLASH_1 0xb0000000 /* Flash Bank #1 */
#define PHYS_FLASH_2 0xb0800000 /* Flash Bank #2 */
/* The following #defines are needed to get flash environment right */
#define CFG_MONITOR_BASE TEXT_BASE
#define CFG_MONITOR_LEN (192 << 10)
#define CFG_INIT_SP_OFFSET 0x400000
#define CFG_FLASH_BASE PHYS_FLASH_1
/* timeout values are in ticks */
#define CFG_FLASH_ERASE_TOUT (2 * CFG_HZ) /* Timeout for Flash Erase */
#define CFG_FLASH_WRITE_TOUT (2 * CFG_HZ) /* Timeout for Flash Write */
#define CFG_ENV_IS_IN_FLASH 1
/* Address and size of Primary Environment Sector */
#define CFG_ENV_ADDR 0xB0030000
#define CFG_ENV_SIZE 0x10000
#define CONFIG_FLASH_16BIT
#define CONFIG_NR_DRAM_BANKS 1
#define CONFIG_INCA_IP_SWITCH
#define CONFIG_NET_MULTI
#define CONFIG_INCA_IP_SWITCH_AMDIX
/*
* JFFS2 partitions
*/
/* No command line, one static partition, use all space on the device */
#undef CONFIG_JFFS2_CMDLINE
#define CONFIG_JFFS2_DEV "nor1"
#define CONFIG_JFFS2_PART_SIZE 0xFFFFFFFF
#define CONFIG_JFFS2_PART_OFFSET 0x00000000
/* mtdparts command line support */
/*
#define CONFIG_JFFS2_CMDLINE
#define MTDIDS_DEFAULT "nor0=INCA-IP Bank 0"
#define MTDPARTS_DEFAULT "mtdparts=INCA-IP Bank 0:192k(uboot)," \
"64k(env)," \
"768k(linux)," \
"1m@3m(rootfs)," \
"768k(linux2)," \
"3m@5m(rootfs2)"
*/
/*-----------------------------------------------------------------------
* Cache Configuration
*/
#define CFG_DCACHE_SIZE 4096
#define CFG_ICACHE_SIZE 4096
#define CFG_CACHELINE_SIZE 16
#endif /* __CONFIG_H */