swarm_devs.c

一个很好的嵌入式linux平台下的bootloader

    *  Return value:
    *  	   TRUE - X1241 is present
    *  	   FALSE - not present
    ********************************************************************* */

static int board_probe_x1241(int chan,int slaveaddr)
{
    uintptr_t reg;
    int devaddr = 0;
    int err;

    /*
     * Make sure the bus is idle (probably should
     * ignore error here)
     */

    if (board_smbus_waitready(chan) < 0) return FALSE;

    /*
     * Write the device address to the controller. There are two
     * parts, the high part goes in the "CMD" field, and the 
     * low part is the data field.
     */

    reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_CMD));
    SBWRITECSR(reg,((devaddr >> 8) & 0x7));

    /*
     * Write the data to the controller
     */

    reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_DATA));
    SBWRITECSR(reg,((devaddr & 0xFF) & 0xFF));

    /*
     * Start the command
     */

    reg = PHYS_TO_K1(A_SMB_REGISTER(chan,R_SMB_START));
    SBWRITECSR(reg,V_SMB_TT(K_SMB_TT_WR2BYTE) | slaveaddr);

    /*
     * Wait till done
     */

    err = board_smbus_waitready(chan);
    if (err < 0) return FALSE;
    return TRUE;
}

/*  *********************************************************************
    *  board_device_init()
    *  
    *  Initialize and add other devices.  Add everything you need
    *  for bootstrap here, like disk drives, flash memory, UARTs,
    *  network controllers, etc.
    *  
    *  Input parameters: 
    *  	   nothing
    *  	   
    *  Return value:
    *  	   nothing
    ********************************************************************* */

void board_device_init(void)
{
    /*
     * Print out the board version number.
     */
    printf("%s board revision %d\n", CFG_BOARDNAME, swarm_board_rev + 1);

    /*
     * UART channel B
     */

    cfe_add_device(&sb1250_uart,A_DUART,1,0);

    /* 
     * Boot ROM, using "new" flash driver
     */

    cfe_add_device(&newflashdrv,
		   BOOTROM_PHYS,
		   REAL_BOOTROM_SIZE | FLASH_FLG_BUS8 | FLASH_FLG_DEV16,
		   NULL);
    cfe_add_device(&newflashdrv,
		   ALT_BOOTROM_PHYS,
		   REAL_BOOTROM_SIZE | FLASH_FLG_BUS8 | FLASH_FLG_DEV16,
		   NULL);

#ifdef _FUNCSIM_
    /*
     * As a hack, we instantiate another flash at 0x1100_0000 (the PCMCIA area)
     * when running in the functional simulator.  We can preload an image into
     * that region for faster booting.  (see build/broadcom/sim/runcfe)
     */
    cfe_add_device(&newflashdrv,0x11000000,64*1024*1024,NULL);
#endif

    /*
     * This is the 24LC128 on SMBus0.  CFE doesn't use it for anything,
     * but you can load data into it and then boot from it by changing a jumper.
     */

    cfe_add_device(&smbus_24lc128,BIGEEPROM_SMBUS_CHAN,BIGEEPROM_SMBUS_DEV,0);

    /* 
     * MACs - must init after environment, since the hw address is stored there 
     */

    cfe_add_device(&sb1250_ether,A_MAC_BASE_0,0,env_getenv("ETH0_HWADDR"));
    cfe_add_device(&sb1250_ether,A_MAC_BASE_1,1,env_getenv("ETH1_HWADDR"));

    /* 
     * IDE disks
     */

    cfe_add_device(&idedrv,IDE_PHYS+(0x1F0<<5),
     		   IDE_PROBE_MASTER_TYPE(IDE_DEVTYPE_DISK) |
     		   IDE_PROBE_SLAVE_TYPE(IDE_DEVTYPE_NOPROBE),
     	 	   NULL);

    /*
     * PCMCIA support
     */

    cfe_add_device(&pcmciadrv,PCMCIA_PHYS,0,NULL);

#if CFG_PCI
    pci_add_devices(cfe_startflags & CFE_INIT_PCI);
#endif

     /*
      * Clock - depends on the hardware version number, since the older
      * boards have Xicor clocks and the newer boards have ST Micro parts.
      */

     switch (swarm_board_rev) {
	 case SWARM_REV_1:
	     cfe_add_device(&smbus_x1241clock,X1240_SMBUS_CHAN,X1240_SMBUS_DEV,0);
	     break;

	 default:
	 case SWARM_REV_2:
	 case SWARM_REV_3:
	     if (board_probe_x1241(X1240_SMBUS_CHAN,X1240_SMBUS_DEV)) {
		 cfe_add_device(&smbus_x1241clock,X1240_SMBUS_CHAN,X1240_SMBUS_DEV,0);
		 }	
	     else {
		 /* Add ST Micro clock driver here */
		 cfe_add_device(&smbus_m41t81clock,M41T81_SMBUS_CHAN,M41T81_SMBUS_DEV,0);
		 }
	 }

#if CFG_VGACONSOLE
    /*
     * VGA Console - try to init a VGA console, fall back to
     * UART if not there.
     */

    if (cfe_startflags & SWARM_VGA_CONSOLE) {
	cfe_ledstr("vgai");
	vgainit_ok = vga_biosinit();
	if (vgainit_ok == 0) cfe_set_console("pcconsole0");
	else cfe_set_console("uart0");
	}
#endif


    /*
     * Set variable that contains CPU speed, spit out config register
     */

    printf("Config switch: %d\n", swarm_config_switch);

    sb1250_show_cpu_type();

    /*
     * Reset the MAC address for MAC 2, since it's hooked
     * to the video codec.  This prevents the OS from
     * probing it.
     */
    SBWRITECSR(A_MAC_REGISTER(2,R_MAC_ETHERNET_ADDR),0);

    /*
     * Some misc devices go here, mostly for playing.
     */

#if CFG_TCP
    cfe_add_device(&tcpconsole,0,0,0);
#endif

#if CFG_USB
    usb_init(NULL);
    cfe_add_device(&usb_disk,0,0,0);
    cfe_add_device(&usb_uart,0,0,0);
#endif
}



/*  *********************************************************************
    *  board_device_reset()
    *  
    *  Reset devices.  This call is done when the firmware is restarted,
    *  as might happen when an operating system exits, just before the
    *  "reset" command is applied to the installed devices.   You can
    *  do whatever board-specific things are here to keep the system
    *  stable, like stopping DMA sources, interrupts, etc.
    *  
    *  Input parameters: 
    *  	   nothing
    *  	   
    *  Return value:
    *  	   nothing
    ********************************************************************* */

void board_device_reset(void)
{
    /*
     * Reset the MAC address for MAC 2, since it's hooked
     * to the video codec.  This prevents the OS from
     * probing it.
     */
    SBWRITECSR(A_MAC_REGISTER(2,R_MAC_ETHERNET_ADDR),0);
}


/*  *********************************************************************
    *  board_setup_autoboot()
    *  
    *  Set up autoboot methods.  This routine sets up the list of 
    *  places to find a boot program.
    *  
    *  Input parameters: 
    *  	   nothing
    *  
    *  Return value:
    *  	   nothing
    ********************************************************************* */
static void board_setup_autoboot(void)
{
    /*
     * First try PCMCIA.  Try to load an elf file called 'autoboot'
     * from the root directory of the FAT filesystem on the PCMCIA card.
     */

    cfe_add_autoboot(CFE_AUTOBOOT_DISK,0,"pcmcia0","elf","fat","autoboot");

    /*
     * Uncomment to try IDE next.  We leave this disabled for now due
     * to the long timeout if you don't have an IDE disk connected.
     */

    /* cfe_add_autoboot(CFE_AUTOBOOT_DISK,0,"ide0.0","raw","raw",NULL); */

    /*
     * If you had partitioned your flash, you could boot from it like this:
     */

    /* cfe_add_autoboot(CFE_AUTOBOOT_RAW,0,"flash0.os","elf","raw",NULL); */

    /*
     * Now try running a script (file containing CFE commands) from
     * the TFTP server.   Your DHCP server must set option 130
     * to contain the name of the script.  Option 130 gets stored
     * in "BOOT_SCRIPT" when a DHCP reply is received.
     */

    cfe_add_autoboot(CFE_AUTOBOOT_NETWORK,LOADFLG_BATCH,
		     "eth0","raw","tftp","$BOOT_SERVER:$BOOT_SCRIPT");

    /*
     * Finally, try loading whatever the DHCP server says is the boot
     * program.  Do this as an ELF file, and failing that, try a
     * raw binary.
     */

    cfe_add_autoboot(CFE_AUTOBOOT_NETWORK,0,"eth0","elf","tftp",NULL);
    cfe_add_autoboot(CFE_AUTOBOOT_NETWORK,0,"eth0","raw","tftp",NULL);
}


/*  *********************************************************************
    *  board_final_init()
    *  
    *  Do any final initialization, such as adding commands to the
    *  user interface.
    *
    *  If you don't want a user interface, put the startup code here.  
    *  This routine is called just before CFE starts its user interface.
    *  
    *  Input parameters: 
    *  	   nothing
    *  	   
    *  Return value:
    *  	   nothing
    ********************************************************************* */

void board_final_init(void)
{
#if CFG_UI
    ui_init_cpu1cmds();
    ui_init_swarmcmds();
    ui_init_corecmds();
    ui_init_soccmds();
    ui_init_testcmds();
    ui_init_toyclockcmds();
    ui_init_tempsensorcmds();
    ui_init_memtestcmds();
    ui_init_resetcmds();
    ui_init_phycmds();
    ui_init_spdcmds();
#if CFG_USB
    ui_init_usbcmds();
#endif
    ui_init_disktestcmds();
    ui_init_ethertestcmds();
    ui_init_flashtestcmds();
#endif

    board_setup_autoboot();

#if !CFG_UI
    cfe_autoboot(NULL,0);
#endif
}