[openocd.git] / src / ecosboard.c

/***************************************************************************
 *   Copyright (C) 2007-2009 by Øyvind Harboe                              *
 *                                                                         *
 *   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.             *
 ***************************************************************************/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <helper/types.h>
#include <jtag/jtag.h>
#include <helper/ioutil.h>
#include <helper/configuration.h>

#include <server/server.h>
#include <server/telnet_server.h>
#include <server/gdb_server.h>
#include <openocd.h>

#include <helper/time_support.h>

#include <sys/time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>

#include <cyg/io/flash.h>
#include <pkgconf/fs_jffs2.h>   // Address of JFFS2
#include <network.h>

#include <fcntl.h>
#include <sys/stat.h>
#include <cyg/fileio/fileio.h>
#include <dirent.h>
#include <cyg/athttpd/http.h>
#include <cyg/athttpd/socket.h>
#include <cyg/athttpd/handler.h>
#include <cyg/athttpd/cgi.h>
#include <cyg/athttpd/forms.h>
#include <cyg/discover/discover.h>
#include <cyg/io/io.h>
#include <cyg/io/serialio.h>
#include <netinet/tcp.h>
#include <cyg/hal/hal_diag.h>

#include "rom.h"

#ifdef CYGPKG_HAL_NIOS2
#include <cyg/hal/io.h>
#define ZY1000_SER_DEV "/dev/uart_0"
#else
#define ZY1000_SER_DEV "/dev/ser0"

#endif


#define MAX_IFS 64
#if defined(CYGPKG_NET_FREEBSD_STACK)
#include <tftp_support.h>
/* posix compatibility broken*/
struct tftpd_fileops fileops =
{
        (int (*)(const char *, int))open,
        close,
        (int (*)(int, const void *, int))write,
        (int (*)(int, void *, int))read
};

#endif


void diag_write(char *buf, int len)
{
        int j;
        for (j = 0; j < len; j++)
        {
                diag_printf("%c", buf[j]);
        }
}

static bool serialLog = true;
static bool writeLog = true;

char hwaddr[512];

#ifdef CYGPKG_PROFILE_GPROF
#include <cyg/profile/profile.h>

extern char _stext, _etext; // Defined by the linker

static char *start_of_code=&_stext;
static char *end_of_code=&_etext;

void start_profile(void)
{
        // This starts up the system-wide profiling, gathering
        // profile information on all of the code, with a 16 byte
        // "bucket" size, at a rate of 100us/profile hit.
        // Note: a bucket size of 16 will give pretty good function
        //       resolution.  Much smaller and the buffer becomes
        //       much too large for very little gain.
        // Note: a timer period of 100us is also a reasonable
        //       compromise.  Any smaller and the overhead of
        //       handling the timter (profile) interrupt could
        //       swamp the system.  A fast processor might get
        //       by with a smaller value, but a slow one could
        //       even be swamped by this value.  If the value is
        //       too large, the usefulness of the profile is reduced.

        // no more interrupts than 1/10ms.
        //profile_on((void *)0, (void *)0x40000, 16, 10000); // SRAM
        //      profile_on(0, &_etext, 16, 10000); // SRAM & DRAM
        profile_on(start_of_code, end_of_code, 16, 10000); // Nios DRAM
}
#endif

static FILE *log;

static char reboot_stack[2048];

static void zylinjtag_reboot(cyg_addrword_t data)
{
        serialLog = true;
        diag_printf("Rebooting in 500 ticks..\n");
        cyg_thread_delay(500);
        diag_printf("Unmounting /config..\n");
        umount("/config");
        diag_printf("Rebooting..\n");
#ifdef CYGPKG_HAL_NIOS2
        /* This will reboot & reconfigure the FPGA from the bootloader
         * and on.
         */
        IOWR(REMOTE_UPDATE_BASE, 0x20, 0x1);
#else
        HAL_PLATFORM_RESET();
#endif
}
static cyg_thread zylinjtag_thread_object;
static cyg_handle_t zylinjtag_thread_handle;

void reboot(void)
{
        cyg_thread_create(1, zylinjtag_reboot, (cyg_addrword_t) 0, "reboot Thread",
                        (void *) reboot_stack, sizeof(reboot_stack),
                        &zylinjtag_thread_handle, &zylinjtag_thread_object);
        cyg_thread_resume(zylinjtag_thread_handle);
}

static char zylinjtag_reboot_port_stack[2048];
static cyg_thread zylinjtag_reboot_port_thread_object;
static cyg_handle_t zylinjtag_reboot_port_thread_handle;

static void zylinjtag_reboot_port_task(cyg_addrword_t data)
{
        int so_reuseaddr_option = 1;

        int fd;
        if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
        {
                LOG_ERROR("error creating socket: %s", strerror(errno));
                exit(-1);
        }

        setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void*) &so_reuseaddr_option,
                        sizeof(int));

        struct sockaddr_in sin;
        unsigned int address_size;
        address_size = sizeof(sin);
        memset(&sin, 0, sizeof(sin));
        sin.sin_family = AF_INET;
        sin.sin_addr.s_addr = INADDR_ANY;
        sin.sin_port = htons(1234);

        if (bind(fd, (struct sockaddr *) &sin, sizeof(sin)) == -1)
        {
                LOG_ERROR("couldn't bind to socket: %s", strerror(errno));
                exit(-1);
        }

        if (listen(fd, 1) == -1)
        {
                LOG_ERROR("couldn't listen on socket: %s", strerror(errno));
                exit(-1);
        }
        //      socket_nonblock(fd);


        accept(fd, (struct sockaddr *) &sin, &address_size);

        diag_printf("Got reboot signal on port 1234");

        reboot();

}

void reboot_port(void)
{
        cyg_thread_create(1, zylinjtag_reboot_port_task, (cyg_addrword_t) 0, "wait for reboot signal on port 1234",
                        (void *) zylinjtag_reboot_port_stack, sizeof(zylinjtag_reboot_port_stack),
                        &zylinjtag_reboot_port_thread_handle, &zylinjtag_reboot_port_thread_object);
        cyg_thread_resume(zylinjtag_reboot_port_thread_handle);
}

int configuration_output_handler(struct command_context *context,
                const char* line)
{
        diag_printf("%s", line);

        return ERROR_OK;
}

int zy1000_configuration_output_handler_log(struct command_context *context,
                const char* line)
{
        LOG_USER_N("%s", line);

        return ERROR_OK;
}

#ifdef CYGPKG_PROFILE_GPROF
//extern int64_t totaltime;

static int zylinjtag_Jim_Command_profile(Jim_Interp *interp, int argc,
                Jim_Obj * const *argv)
{
        if ((argc == 2) && (strcmp(Jim_GetString(argv[1], NULL), "stats")==0))
        {
//              profile_off();
                //LOG_USER("Stats %dms sleeping in select()", (int)totaltime);
        } else
        {
                LOG_USER("Profiling started");
                start_profile();
                //totaltime = 0;
        }
        return ERROR_OK;
}

#endif

externC void phi_init_all_network_interfaces(void);

struct command_context *cmd_ctx;

static bool webRunning = false;

void keep_webserver(void)
{
        // Target initialisation is only attempted at startup, so we sleep forever and
        // let the http server bail us out(i.e. get config files set up).
        diag_printf("OpenOCD has invoked exit().\n"
                "Use web server to correct any configuration settings and reboot.\n");
        if (!webRunning)
                reboot();

        // exit() will terminate the current thread and we we'll then sleep eternally or
        // we'll have a reboot scheduled.
}

extern void printDccChar(char c);

static char logBuffer[128 * 1024];
static const int logSize = sizeof(logBuffer);
int writePtr = 0;
int logCount = 0;

void _zylinjtag_diag_write_char(char c, void **param)
{
        if (writeLog)
        {
                logBuffer[writePtr] = c;
                writePtr = (writePtr + 1) % logSize;
                logCount++;
        }
        if (serialLog)
        {
                if (c == '\n')
                {
                        HAL_DIAG_WRITE_CHAR('\r');
                }
                HAL_DIAG_WRITE_CHAR(c);
        }

#ifdef CYGPKG_HAL_ZYLIN_PHI
        printDccChar(c);
#endif
}

void copyfile(char *name2, char *name1);

void copydir(char *name, char *destdir);

#if 0
MTAB_ENTRY(romfs_mte1,
                "/rom",
                "romfs",
                "",
                (CYG_ADDRWORD) &filedata[0]);
#endif

void openocd_sleep_prelude(void)
{
        cyg_mutex_unlock(&httpstate.jim_lock);
}

void openocd_sleep_postlude(void)
{
        cyg_mutex_lock(&httpstate.jim_lock);
}

void format(void)
{
#ifdef CYGDAT_IO_FLASH_BLOCK_DEVICE_NAME_1
        diag_printf("Formatting JFFS2...\n");

        cyg_io_handle_t handle;

        Cyg_ErrNo err;
        err = cyg_io_lookup(CYGDAT_IO_FLASH_BLOCK_DEVICE_NAME_1, &handle);
        if (err != ENOERR)
        {
                diag_printf("Flash Error cyg_io_lookup: %d\n", err);
                reboot();
        }

        cyg_uint32 len;
        cyg_io_flash_getconfig_devsize_t ds;
        len = sizeof(ds);
        err = cyg_io_get_config(handle, CYG_IO_GET_CONFIG_FLASH_DEVSIZE, &ds, &len);
        if (err != ENOERR)
        {
                diag_printf("Flash error cyg_io_get_config %d\n", err);
                reboot();
        }

        cyg_io_flash_getconfig_erase_t e;
        len = sizeof(e);

        e.offset = 0;
        e.len = ds.dev_size;

        diag_printf("Formatting 0x%08x bytes\n", (int)ds.dev_size);
        err = cyg_io_get_config(handle, CYG_IO_GET_CONFIG_FLASH_ERASE, &e, &len);
        if (err != ENOERR)
        {
                diag_printf("Flash erase error %d offset 0x%08x\n", err, e.err_address);
                reboot();
        }

        diag_printf("Flash formatted successfully\n");
#endif

        reboot();
}

static int zylinjtag_Jim_Command_format_jffs2(Jim_Interp *interp, int argc,
                Jim_Obj * const *argv)
{
        if (argc != 1)
        {
                return JIM_ERR;
        }

        format();
        for (;;)
                ;
}

static int zylinjtag_Jim_Command_threads(Jim_Interp *interp, int argc,
                Jim_Obj * const *argv)
{
        cyg_handle_t thread = 0;
        cyg_uint16 id = 0;
        Jim_Obj *threads = Jim_NewListObj(interp, NULL, 0);

        /* Loop over the threads, and generate a table row for
         * each.
         */
        while (cyg_thread_get_next(&thread, &id))
        {
                Jim_Obj *threadObj = Jim_NewListObj(interp, NULL, 0);

                cyg_thread_info info;
                char *state_string;

                cyg_thread_get_info(thread, id, &info);

                if (info.name == NULL)
                        info.name = "<no name>";

                Jim_ListAppendElement(interp, threadObj, Jim_NewStringObj(interp,
                                info.name, strlen(info.name)));

                /* Translate the state into a string.
                 */
                if (info.state == 0)
                        state_string = "RUN";
                else if (info.state & 0x04)
                        state_string = "SUSP";
                else
                        switch (info.state & 0x1b)
                        {
                        case 0x01:
                                state_string = "SLEEP";
                                break;
                        case 0x02:
                                state_string = "CNTSLEEP";
                                break;
                        case 0x08:
                                state_string = "CREATE";
                                break;
                        case 0x10:
                                state_string = "EXIT";
                                break;
                        default:
                                state_string = "????";
                                break;
                        }

                Jim_ListAppendElement(interp, threadObj, Jim_NewStringObj(interp,
                                state_string, strlen(state_string)));

                Jim_ListAppendElement(interp, threadObj, Jim_NewIntObj(interp, id));
                Jim_ListAppendElement(interp, threadObj, Jim_NewIntObj(interp,
                                info.set_pri));
                Jim_ListAppendElement(interp, threadObj, Jim_NewIntObj(interp,
                                info.cur_pri));

                Jim_ListAppendElement(interp, threads, threadObj);
        }
        Jim_SetResult(interp, threads);

        return JIM_OK;
}

static int zylinjtag_Jim_Command_log(Jim_Interp *interp, int argc,
                Jim_Obj * const *argv)
{
        Jim_Obj *tclOutput = Jim_NewStringObj(interp, "", 0);

        if (logCount >= logSize)
        {
                Jim_AppendString(httpstate.jim_interp, tclOutput, logBuffer + logCount
                                % logSize, logSize - logCount % logSize);
        }
        Jim_AppendString(httpstate.jim_interp, tclOutput, logBuffer, writePtr);

        Jim_SetResult(interp, tclOutput);
        return JIM_OK;
}

static int zylinjtag_Jim_Command_reboot(Jim_Interp *interp, int argc,
                Jim_Obj * const *argv)
{
        reboot();
        return JIM_OK;
}

static void zylinjtag_startNetwork(void)
{
        // Bring TCP/IP up immediately before we're ready to accept commands.
        //
        // That is as soon as a PING responds, we're accepting telnet sessions.
#if defined(CYGPKG_NET_FREEBSD_STACK)
        phi_init_all_network_interfaces();
#else
        lwip_init();
#endif
        if (!eth0_up)
        {
                diag_printf("Network not up and running\n");
                exit(-1);
        }

        /* very first thing we want is a reboot capability */
        reboot_port();

#if defined(CYGPKG_NET_FREEBSD_STACK)
        /*start TFTP*/
        tftpd_start(69, &fileops);
#endif

        cyg_httpd_init_tcl_interpreter();

        Jim_CreateCommand(httpstate.jim_interp, "log", zylinjtag_Jim_Command_log,
                        NULL, NULL);
        Jim_CreateCommand(httpstate.jim_interp, "zy1000_reboot",
                        zylinjtag_Jim_Command_reboot, NULL, NULL);
        Jim_CreateCommand(httpstate.jim_interp, "threads",
                        zylinjtag_Jim_Command_threads, NULL, NULL);
        Jim_CreateCommand(httpstate.jim_interp, "format_jffs2",
                        zylinjtag_Jim_Command_format_jffs2, NULL, NULL);

        cyg_httpd_start();

        webRunning = true;

        diag_printf("Web server running\n");

        int s;
        struct ifreq ifr;
        s = socket(AF_INET, SOCK_DGRAM, 0);
        if (s >= 0)
        {
                strcpy(ifr.ifr_name, "eth0");
                int res;
                res = ioctl(s, SIOCGIFHWADDR, &ifr);
                close(s);

                if (res < 0)
                {
                        diag_printf("Can't obtain MAC address\n");
                        reboot();
                }
        }

        sprintf(hwaddr, "%02x:%02x:%02x:%02x:%02x:%02x",
                        (int) ((unsigned char *) &ifr.ifr_hwaddr.sa_data)[0],
                        (int) ((unsigned char *) &ifr.ifr_hwaddr.sa_data)[1],
                        (int) ((unsigned char *) &ifr.ifr_hwaddr.sa_data)[2],
                        (int) ((unsigned char *) &ifr.ifr_hwaddr.sa_data)[3],
                        (int) ((unsigned char *) &ifr.ifr_hwaddr.sa_data)[4],
                        (int) ((unsigned char *) &ifr.ifr_hwaddr.sa_data)[5]);

        discover_message
                        = alloc_printf("ZY1000 Zylin JTAG debugger MAC %s", hwaddr);

        discover_launch();
}

static void print_exception_handler(cyg_addrword_t data, cyg_code_t exception,
                cyg_addrword_t info)
{
        writeLog = false;
        serialLog = true;
        char *infoStr = "unknown";
        switch (exception)
        {
#ifdef CYGNUM_HAL_VECTOR_UNDEF_INSTRUCTION
        case CYGNUM_HAL_VECTOR_UNDEF_INSTRUCTION:
        infoStr = "undefined instruction";
        break;
        case CYGNUM_HAL_VECTOR_SOFTWARE_INTERRUPT:
        infoStr = "software interrupt";
        break;
        case CYGNUM_HAL_VECTOR_ABORT_PREFETCH:
        infoStr = "abort prefetch";
        break;
        case CYGNUM_HAL_VECTOR_ABORT_DATA:
        infoStr = "abort data";
        break;
#endif
        default:
                break;
        }

        diag_printf("Exception: %08x(%s) %08x\n", exception, infoStr, info);

        diag_printf("Dumping log\n---\n");
        if (logCount >= logSize)
        {
                diag_write(logBuffer + logCount % logSize, logSize - logCount % logSize);
        }
        diag_write(logBuffer, writePtr);

        diag_printf("---\nLogdump complete.\n");
        diag_printf("Exception: %08x(%s) %08x\n", exception, infoStr, info);
        diag_printf("\n---\nRebooting\n");
        HAL_PLATFORM_RESET();

}

#ifdef CYGNUM_HAL_VECTOR_UNDEF_INSTRUCTION
static void setHandler(cyg_code_t exception)
{
        cyg_exception_handler_t *old_handler;
        cyg_addrword_t old_data;

        cyg_exception_set_handler(exception, print_exception_handler, 0,
                        &old_handler, &old_data);
}
#endif

static cyg_thread zylinjtag_uart_thread_object;
static cyg_handle_t zylinjtag_uart_thread_handle;
static char uart_stack[4096];

static char forwardBuffer[1024]; // NB! must be smaller than a TCP/IP packet!!!!!
static char backwardBuffer[1024];

void setNoDelay(int session, int flag)
{
#if 1
        // This decreases latency dramatically for e.g. GDB load which
        // does not have a sliding window protocol
        //
        // Can cause *lots* of TCP/IP packets to be sent and it would have
        // to be enabled/disabled on the fly to avoid the CPU being
        // overloaded...
        setsockopt(session, /* socket affected */
        IPPROTO_TCP, /* set option at TCP level */
        TCP_NODELAY, /* name of option */
        (char *) &flag, /* the cast is historical
         cruft */
        sizeof(int)); /* length of option value */
#endif
}

#define TEST_TCPIP() 0

#if TEST_TCPIP
struct
{
        int req;
        int actual;
        int req2;
        int actual2;
} tcpipSent[512 * 1024];
int cur;
#endif

static void zylinjtag_uart(cyg_addrword_t data)
{
        int so_reuseaddr_option = 1;

        int fd;
        if ((fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
        {
                LOG_ERROR("error creating socket: %s", strerror(errno));
                exit(-1);
        }

        setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void*) &so_reuseaddr_option,
                        sizeof(int));

        struct sockaddr_in sin;
        unsigned int address_size;
        address_size = sizeof(sin);
        memset(&sin, 0, sizeof(sin));
        sin.sin_family = AF_INET;
        sin.sin_addr.s_addr = INADDR_ANY;
        sin.sin_port = htons(5555);

        if (bind(fd, (struct sockaddr *) &sin, sizeof(sin)) == -1)
        {
                LOG_ERROR("couldn't bind to socket: %s", strerror(errno));
                exit(-1);
        }

        if (listen(fd, 1) == -1)
        {
                LOG_ERROR("couldn't listen on socket: %s", strerror(errno));
                exit(-1);
        }
        //      socket_nonblock(fd);


        for (;;)
        {
                int session = accept(fd, (struct sockaddr *) &sin, &address_size);
                if (session < 0)
                {
                        continue;
                }

                setNoDelay(session, 1);
                int oldopts = fcntl(session, F_GETFL, 0);
                fcntl(session, F_SETFL, oldopts | O_NONBLOCK); //

                int serHandle = open(ZY1000_SER_DEV, O_RDWR | O_NONBLOCK);
                if (serHandle < 0)
                {
                        close(session);
                        continue;
                }

#ifdef CYGPKG_PROFILE_GPROF
                start_profile();
#endif
                size_t actual = 0;
                size_t actual2 = 0;
                size_t pos, pos2;
                pos = 0;
                pos2 = 0;
#if TEST_TCPIP
                cur = 0;
#endif
                for (;;)
                {
                        fd_set write_fds;
                        fd_set read_fds;
                        FD_ZERO(&write_fds);
                        FD_ZERO(&read_fds);
                        int fd_max = -1;
                        FD_SET(session, &read_fds);
                        fd_max = session;
                        FD_SET(serHandle, &read_fds);
                        if (serHandle > fd_max)
                        {
                                fd_max = serHandle;
                        }
                        /* Wait... */

                        cyg_thread_delay(5); // 50ms fixed delay to wait for data to be sent/received
                        if ((actual == 0) && (actual2 == 0))
                        {
                                int retval = select(fd_max + 1, &read_fds, NULL, NULL, NULL);
                                if (retval <= 0)
                                {
                                        break;
                                }
                        }

                        if (actual2 <= 0)
                        {
                                memset(backwardBuffer, 's', sizeof(backwardBuffer));
                                int t;
                                t = read(serHandle, backwardBuffer,
                                                sizeof(backwardBuffer));
                                actual2 = t;
                                if (t < 0)
                                {
                                        if (errno != EAGAIN)
                                        {
                                                goto closeSession;
                                        }
                                        actual2 = 0;
                                }
                                pos2 = 0;
                        }

                        size_t y = 0;
                        if (actual2 > 0)
                        {
                                int written = write(session, backwardBuffer + pos2, actual2);
                                if (written <= 0)
                                        goto closeSession;
                                actual2 -= written;
                                pos2 += written;
                                y = written;
                        }

                        if (FD_ISSET(session, &read_fds)
                                        && (sizeof(forwardBuffer) > actual))
                        {
                                // NB! Here it is important that we empty the TCP/IP read buffer
                                // to make transmission tick right
                                memmove(forwardBuffer, forwardBuffer + pos, actual);
                                pos = 0;
                                int t;
                                // this will block if there is no data at all
                                t = read_socket(session, forwardBuffer + actual,
                                                sizeof(forwardBuffer) - actual);
                                if (t <= 0)
                                {
                                        goto closeSession;
                                }
                                actual += t;
                        }

                        int y2 = 0;
                        if (actual > 0)
                        {
                                /* Do not put things into the serial buffer if it has something to send
                                 * as that can cause a single byte to be sent at the time.
                                 *
                                 *
                                 */
                                int written = write(serHandle, forwardBuffer + pos, actual);
                                if (written < 0)
                                {
                                        if (errno != EAGAIN)
                                        {
                                                goto closeSession;
                                        }
                                        // The serial buffer is full
                                        written = 0;
                                }
                                else
                                {
                                        actual -= written;
                                        pos += written;
                                }
                                y2 = written;
                        }
#if TEST_TCPIP
                        if (cur < 1024)
                        {
                                tcpipSent[cur].req = x;
                                tcpipSent[cur].actual = y;
                                tcpipSent[cur].req2 = x2;
                                tcpipSent[cur].actual2 = y2;
                                cur++;
                        }
#endif
                }
                closeSession: close(session);
                close(serHandle);

#if TEST_TCPIP
                int i;
                for (i = 0; i < 1024; i++)
                {
                        diag_printf("%d %d %d %d\n", tcpipSent[i].req, tcpipSent[i].actual,
                                        tcpipSent[i].req2, tcpipSent[i].actual2);

                }
#endif
        }
        close(fd);

}

void startUart(void)
{
        cyg_thread_create(1, zylinjtag_uart, (cyg_addrword_t) 0, "uart thread",
                        (void *) uart_stack, sizeof(uart_stack),
                        &zylinjtag_uart_thread_handle, &zylinjtag_uart_thread_object);
        cyg_thread_set_priority(zylinjtag_uart_thread_handle, 1); // low priority as it sits in a busy loop
        cyg_thread_resume(zylinjtag_uart_thread_handle);
}

static int zylinjtag_Jim_Command_uart(Jim_Interp *interp, int argc,
                Jim_Obj * const *argv)
{
        static int current_baud = 38400;
        if (argc == 1)
        {
                Jim_SetResult(interp, Jim_NewIntObj(interp, current_baud));
                return JIM_OK;
        }
        else if (argc != 2)
        {
                return JIM_ERR;
        }

        long new_baudrate;
        if (Jim_GetLong(interp, argv[1], &new_baudrate) != JIM_OK)
                return JIM_ERR;

        current_baud = new_baudrate;

        int baud;
        switch (current_baud)
        {
        case 9600:
                baud = CYGNUM_SERIAL_BAUD_9600;
                break;
        case 19200:
                baud = CYGNUM_SERIAL_BAUD_19200;
                break;
        case 38400:
                baud = CYGNUM_SERIAL_BAUD_38400;
                break;
        case 57600:
                baud = CYGNUM_SERIAL_BAUD_57600;
                break;
        case 115200:
                baud = CYGNUM_SERIAL_BAUD_115200;
                break;
        case 230400:
                baud = CYGNUM_SERIAL_BAUD_230400;
                break;
        default:
                Jim_SetResult(interp, Jim_NewStringObj(interp, "unsupported baudrate", -1));
                return JIM_ERR;
        }

        cyg_serial_info_t buf;
        cyg_uint32 len = 1;
        //get existing serial configuration
        len = sizeof(cyg_serial_info_t);
        int err;
        cyg_io_handle_t serial_handle;

        err = cyg_io_lookup(ZY1000_SER_DEV, &serial_handle);
        if (err != ENOERR)
        {
                Jim_SetResult(interp, Jim_NewStringObj(interp, "Could not open serial port", -1));
                return JIM_ERR;
        }

        err = cyg_io_get_config(serial_handle,
                        CYG_IO_GET_CONFIG_SERIAL_OUTPUT_DRAIN, &buf, &len);
        err = cyg_io_get_config(serial_handle, CYG_IO_GET_CONFIG_SERIAL_INFO, &buf,
                        &len);
        if (err != ENOERR)
        {
                Jim_SetResult(interp, Jim_NewStringObj(interp, "Failed to get serial port settings", -1));
                return JIM_ERR;
        }
        buf.baud = baud;

        err = cyg_io_set_config(serial_handle, CYG_IO_SET_CONFIG_SERIAL_INFO, &buf,
                        &len);
        if (err != ENOERR)
        {
                Jim_SetResult(interp, Jim_NewStringObj(interp, "Failed to set serial port settings", -1));
                return JIM_ERR;
        }

        return JIM_OK;
}

bool logAllToSerial = false;


int boolParam(char *var);


static const char *zylin_config_dir="/config/settings";

static int add_default_dirs(void)
{
        add_script_search_dir(zylin_config_dir);
        add_script_search_dir("/rom/lib/openocd");
        add_script_search_dir("/rom");
        return ERROR_OK;
}

int main(int argc, char *argv[])
{
        /* ramblockdevice will be the same address every time. The deflate app uses a buffer 16mBytes out, so we
         * need to allocate towards the end of the heap.  */

#ifdef CYGNUM_HAL_VECTOR_UNDEF_INSTRUCTION
        setHandler(CYGNUM_HAL_VECTOR_UNDEF_INSTRUCTION);
        setHandler(CYGNUM_HAL_VECTOR_ABORT_PREFETCH);
        setHandler(CYGNUM_HAL_VECTOR_ABORT_DATA);
#endif

        int err;

        atexit(keep_webserver);

        diag_init_putc(_zylinjtag_diag_write_char);
        // We want this in the log.
#ifdef CYGPKG_HAL_NIOS2
        diag_printf("Zylin ZY1000 PCB revc.\n");
#else
        diag_printf("Zylin ZY1000 PCB revb.\n");
#endif

        err = mount("", "/ram", "ramfs");
        if (err < 0)
        {
                diag_printf("unable to mount ramfs\n");
        }
        chdir("/ram");

        char address[16];
        sprintf(address, "%p", &filedata[0]);
        err = mount(address, "/rom", "romfs");
        if (err < 0)
        {
                diag_printf("unable to mount /rom\n");
        }

        err = mount("", "/log", "logfs");
        if (err < 0)
        {
                diag_printf("unable to mount logfs\n");
        }

        err = mount("", "/tftp", "tftpfs");
        if (err < 0)
        {
                diag_printf("unable to mount logfs\n");
        }

        log = fopen("/log/log", "w");
        if (log == NULL)
        {
                diag_printf("Could not open log file /ram/log\n");
                exit(-1);
        }


        copydir("/rom", "/ram/cgi");

#ifdef CYGPKG_HAL_NIOS2
        cyg_flashaddr_t err_address;
#define UNCACHED_EXT_FLASH_BASE (0x80000000 + EXT_FLASH_BASE)
        /* The revc flash is locked upon reset, unlock it */
#ifdef CYGHWR_IO_FLASH_BLOCK_LOCKING
        if ((err = flash_unlock((void *) UNCACHED_EXT_FLASH_BASE, EXT_FLASH_SPAN,
                        (void **) &err_address)) != 0)
        {
                diag_printf("Error: could not unlock flash\n");
        }
#endif
#endif


        err = mount("/dev/flash1", "/config", "jffs2");
        if (err < 0)
        {
                diag_printf("unable to mount jffs2, falling back to ram disk..\n");
                err = mount("", "/config", "ramfs");
                if (err < 0)
                {
                        diag_printf("unable to mount /config as ramdisk.\n");
                        reboot();
                }
        }
        else
        {
                /* are we using a ram disk instead of a flash disk? This is used
                 * for ZY1000 live demo...
                 *
                 * copy over flash disk to ram block device
                 */
                if (boolParam("ramdisk"))
                {
                        diag_printf("Unmounting /config from flash and using ram instead\n");
                        err = umount("/config");
                        if (err < 0)
                        {
                                diag_printf("unable to unmount jffs\n");
                                reboot();
                        }

                        err = mount("/dev/flash1", "/config2", "jffs2");
                        if (err < 0)
                        {
                                diag_printf("unable to mount jffs\n");
                                reboot();
                        }

                        err = mount("", "/config", "ramfs");
                        if (err < 0)
                        {
                                diag_printf("unable to mount ram block device\n");
                                reboot();
                        }

                        //              copydir("/config2", "/config");
                        copyfile("/config2/ip", "/config/ip");
                        copydir("/config2/settings", "/config/settings");

                        umount("/config2");
                }
        }

        mkdir(zylin_config_dir, 0777);
        char *dirname = alloc_printf("%s/target", zylin_config_dir);
        mkdir(dirname, 0777);
        free(dirname);
        dirname = alloc_printf("%s/board", zylin_config_dir);
        mkdir(dirname, 0777);
        free(dirname);
        dirname = alloc_printf("%s/event", zylin_config_dir);
        mkdir(dirname, 0777);
        free(dirname);

        logAllToSerial = boolParam("logserial");

        // We need the network & web server in case there is something wrong with
        // the config files that invoke exit()
        zylinjtag_startNetwork();

        /* we're going to access the jim interpreter from here on... */
        openocd_sleep_postlude();
        startUart();

        add_default_dirs();

        /* initialize commandline interface */
        struct command_context * cmd_ctx;
        struct command_context *setup_command_handler(Jim_Interp *interp);
        cmd_ctx = setup_command_handler(httpstate.jim_interp);
        command_set_output_handler(cmd_ctx, configuration_output_handler, NULL);
        command_context_mode(cmd_ctx, COMMAND_CONFIG);

        if (ioutil_init(cmd_ctx) != ERROR_OK)
                return EXIT_FAILURE;

#ifdef CYGPKG_PROFILE_GPROF
        Jim_CreateCommand(httpstate.jim_interp, "zy1000_profile", zylinjtag_Jim_Command_profile,
                        NULL, NULL);
#endif

        Jim_CreateCommand(httpstate.jim_interp, "zy1000_uart", zylinjtag_Jim_Command_uart, NULL, NULL);


        log_init();

        set_log_output(cmd_ctx, log);

        LOG_DEBUG("log init complete");

        //      diag_printf("Executing config files\n");

        if (logAllToSerial)
        {
                diag_printf(
                                 "%s/logserial = 1 => sending log output to serial port using \"debug_level 3\" as default.\n", zylin_config_dir);
                command_run_line(cmd_ctx, "debug_level 3");
        }

        command_run_linef(cmd_ctx, "script /rom/openocd.cfg");

        int ret;
        ret = server_init(cmd_ctx);
        if (ERROR_OK != ret)
                return EXIT_FAILURE;

        /* we MUST always run the init command as it will launch telnet sessions */
        command_run_line(cmd_ctx, "init");

        // FIX!!!  Yuk!
        // diag_printf() is really invoked from many more places than we trust it
        // not to cause instabilities(e.g. invoking fputc() from an interrupt is *BAD*).
        //
        // Disabling it here is safe and gives us enough logged debug output for now. Crossing
        // fingers that it doesn't cause any crashes.
        diag_printf("Init complete, GDB & telnet servers launched.\n");
        command_set_output_handler(cmd_ctx,
                        zy1000_configuration_output_handler_log, NULL);
        if (!logAllToSerial)
        {
                serialLog = false;
        }

        /* handle network connections */
        server_loop(cmd_ctx);
        openocd_sleep_prelude();

        /* shut server down */
        server_quit();

        /* free commandline interface */
        command_done(cmd_ctx);
        umount("/config");

        exit(0);
        for (;;)
                ;
}

cyg_int32 cyg_httpd_exec_cgi_tcl(char *file_name);
cyg_int32 homeForm(CYG_HTTPD_STATE *p)
{
        cyg_httpd_exec_cgi_tcl("/ram/cgi/index.tcl");
        return 0;
}

CYG_HTTPD_HANDLER_TABLE_ENTRY(root_label, "/", homeForm);

CYG_HTTPD_MIME_TABLE_ENTRY(text_mime_label, "text", "text/plain");
CYG_HTTPD_MIME_TABLE_ENTRY(bin_mime_label, "bin", "application/octet-stream");

#include <pkgconf/system.h>
#include <pkgconf/hal.h>
#include <pkgconf/kernel.h>
#include <pkgconf/io_fileio.h>
#include <pkgconf/fs_rom.h>

#include <cyg/kernel/ktypes.h>         // base kernel types
#include <cyg/infra/cyg_trac.h>        // tracing macros
#include <cyg/infra/cyg_ass.h>         // assertion macros
#include <cyg/fileio/fileio.h>
#include <cyg/kernel/kapi.h>
#include <cyg/infra/diag.h>

//==========================================================================
// Eventually we want to eXecute In Place from the ROM in a protected
// environment, so we'll need executables to be aligned to a boundary
// suitable for MMU protection. A suitable boundary would be the 4k
// boundary in all the CPU architectures I am currently aware of.

// Forward definitions

// Filesystem operations
static int tftpfs_mount(cyg_fstab_entry *fste, cyg_mtab_entry *mte);
static int tftpfs_umount(cyg_mtab_entry *mte);
static int tftpfs_open(cyg_mtab_entry *mte, cyg_dir dir, const char *name,
                int mode, cyg_file *fte);
static int tftpfs_fo_read(struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio);
static int tftpfs_fo_write(struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio);

// File operations
static int tftpfs_fo_fsync(struct CYG_FILE_TAG *fp, int mode);
static int tftpfs_fo_close(struct CYG_FILE_TAG *fp);
static int tftpfs_fo_lseek(struct CYG_FILE_TAG *fp, off_t *apos, int whence);

//==========================================================================
// Filesystem table entries

// -------------------------------------------------------------------------
// Fstab entry.
// This defines the entry in the filesystem table.
// For simplicity we use _FILESYSTEM synchronization for all accesses since
// we should never block in any filesystem operations.
#if 1
FSTAB_ENTRY(tftpfs_fste, "tftpfs", 0,
                CYG_SYNCMODE_NONE,
                tftpfs_mount,
                tftpfs_umount,
                tftpfs_open,
                (cyg_fsop_unlink *)cyg_fileio_erofs,
                (cyg_fsop_mkdir *)cyg_fileio_erofs,
                (cyg_fsop_rmdir *)cyg_fileio_erofs,
                (cyg_fsop_rename *)cyg_fileio_erofs,
                (cyg_fsop_link *)cyg_fileio_erofs,
                (cyg_fsop_opendir *)cyg_fileio_erofs,
                (cyg_fsop_chdir *)cyg_fileio_erofs,
                (cyg_fsop_stat *)cyg_fileio_erofs,
                (cyg_fsop_getinfo *)cyg_fileio_erofs,
                (cyg_fsop_setinfo *)cyg_fileio_erofs);
#endif

// -------------------------------------------------------------------------
// mtab entry.
// This defines a single ROMFS loaded into ROM at the configured address
//
// MTAB_ENTRY(rom_mte,  // structure name
//              "/rom",         // mount point
//              "romfs",        // FIlesystem type
//              "",             // hardware device
//  (CYG_ADDRWORD) CYGNUM_FS_ROM_BASE_ADDRESS   // Address in ROM
//);


// -------------------------------------------------------------------------
// File operations.
// This set of file operations are used for normal open files.

static cyg_fileops tftpfs_fileops =
{ tftpfs_fo_read, tftpfs_fo_write, tftpfs_fo_lseek,
                (cyg_fileop_ioctl *) cyg_fileio_erofs, cyg_fileio_seltrue,
                tftpfs_fo_fsync, tftpfs_fo_close,
                (cyg_fileop_fstat *) cyg_fileio_erofs,
                (cyg_fileop_getinfo *) cyg_fileio_erofs,
                (cyg_fileop_setinfo *) cyg_fileio_erofs, };

// -------------------------------------------------------------------------
// tftpfs_mount()
// Process a mount request. This mainly finds root for the
// filesystem.

static int tftpfs_mount(cyg_fstab_entry *fste, cyg_mtab_entry *mte)
{
        return ENOERR;
}

static int tftpfs_umount(cyg_mtab_entry *mte)
{
        return ENOERR;
}

struct Tftp
{
        int write;
        int readFile;
        cyg_uint8 *mem;
        int actual;
        char *server;
        char *file;
};

static void freeTftp(struct Tftp *t)
{
        if (t == NULL)
                return;
        if (t->mem)
                free(t->mem);
        if (t->server)
                free(t->server);
        if (t->file)
                free(t->file);
        free(t);
}

static const int tftpMaxSize = 8192 * 1024;
static int tftpfs_open(cyg_mtab_entry *mte, cyg_dir dir, const char *name,
                int mode, cyg_file *file)
{
        struct Tftp *tftp;
        tftp = malloc(sizeof(struct Tftp));
        if (tftp == NULL)
                return EMFILE;
        memset(tftp, 0, sizeof(struct Tftp));

        file->f_flag |= mode & CYG_FILE_MODE_MASK;
        file->f_type = CYG_FILE_TYPE_FILE;
        file->f_ops = &tftpfs_fileops;
        file->f_offset = 0;
        file->f_data = 0;
        file->f_xops = 0;

        tftp->mem = malloc(tftpMaxSize);
        if (tftp->mem == NULL)
        {
                freeTftp(tftp);
                return EMFILE;
        }

        char *server = strchr(name, '/');
        if (server == NULL)
        {
                freeTftp(tftp);
                return EMFILE;
        }

        tftp->server = malloc(server - name + 1);
        if (tftp->server == NULL)
        {
                freeTftp(tftp);
                return EMFILE;
        }
        strncpy(tftp->server, name, server - name);
        tftp->server[server - name] = 0;

        tftp->file = strdup(server + 1);
        if (tftp->file == NULL)
        {
                freeTftp(tftp);
                return EMFILE;
        }

        file->f_data = (CYG_ADDRWORD) tftp;

        return ENOERR;
}

static int fetchTftp(struct Tftp *tftp)
{
        if (!tftp->readFile)
        {
                int err;
                tftp->actual = tftp_client_get(tftp->file, tftp->server, 0, tftp->mem,
                                tftpMaxSize, TFTP_OCTET, &err);

                if (tftp->actual < 0)
                {
                        return EMFILE;
                }
                tftp->readFile = 1;
        }
        return ENOERR;
}

// -------------------------------------------------------------------------
// tftpfs_fo_write()
// Read data from file.

static int tftpfs_fo_read(struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio)
{
        struct Tftp *tftp = (struct Tftp *) fp->f_data;

        if (fetchTftp(tftp) != ENOERR)
                return EMFILE;

        int i;
        off_t pos = fp->f_offset;
        int resid = 0;
        for (i = 0; i < uio->uio_iovcnt; i++)
        {
                cyg_iovec *iov = &uio->uio_iov[i];
                char *buf = (char *) iov->iov_base;
                off_t len = iov->iov_len;

                if (len + pos > tftp->actual)
                {
                        len = tftp->actual - pos;
                }
                resid += iov->iov_len - len;

                memcpy(buf, tftp->mem + pos, len);
                pos += len;

        }
        uio->uio_resid = resid;
        fp->f_offset = pos;

        return ENOERR;
}

static int tftpfs_fo_write(struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio)
{
        struct Tftp *tftp = (struct Tftp *) fp->f_data;

        int i;
        off_t pos = fp->f_offset;
        int resid = 0;
        for (i = 0; i < uio->uio_iovcnt; i++)
        {
                cyg_iovec *iov = &uio->uio_iov[i];
                char *buf = (char *) iov->iov_base;
                off_t len = iov->iov_len;

                if (len + pos > tftpMaxSize)
                {
                        len = tftpMaxSize - pos;
                }
                resid += iov->iov_len - len;

                memcpy(tftp->mem + pos, buf, len);
                pos += len;

        }
        uio->uio_resid = resid;
        fp->f_offset = pos;

        tftp->write = 1;

        return ENOERR;
}

static int tftpfs_fo_fsync(struct CYG_FILE_TAG *fp, int mode)
{
        int error = ENOERR;
        return error;
}

// -------------------------------------------------------------------------
// romfs_fo_close()
// Close a file. We just clear out the data pointer.

static int tftpfs_fo_close(struct CYG_FILE_TAG *fp)
{
        struct Tftp *tftp = (struct Tftp *) fp->f_data;
        int error = ENOERR;

        if (tftp->write)
        {
                tftp_client_put(tftp->file, tftp->server, 0, tftp->mem, fp->f_offset,
                                TFTP_OCTET, &error);
        }

        freeTftp(tftp);
        fp->f_data = 0;
        return error;
}

// -------------------------------------------------------------------------
// romfs_fo_lseek()
// Seek to a new file position.

static int tftpfs_fo_lseek(struct CYG_FILE_TAG *fp, off_t *apos, int whence)
{
        struct Tftp *tftp = (struct Tftp *) fp->f_data;
        off_t pos = *apos;

        if (fetchTftp(tftp) != ENOERR)
                return EMFILE;

        switch (whence)
        {
        case SEEK_SET:
                // Pos is already where we want to be.
                break;

        case SEEK_CUR:
                // Add pos to current offset.
                pos += fp->f_offset;
                break;

        case SEEK_END:
                // Add pos to file size.
                pos += tftp->actual;
                break;

        default:
                return EINVAL;
        }

        // Check that pos is still within current file size, or at the
        // very end.
        if (pos < 0 || pos > tftp->actual)
                return EINVAL;

        // All OK, set fp offset and return new position.
        *apos = fp->f_offset = pos;

        return ENOERR;
}

void usleep(int us)
{
        if (us > 10000)
                cyg_thread_delay(us / 10000 + 1);
        else
                HAL_DELAY_US(us);
}

// Chunked version.
cyg_int32 show_log_entry(CYG_HTTPD_STATE *phttpstate)
{
        cyg_httpd_start_chunked("text");
        if (logCount >= logSize)
        {
                cyg_httpd_write_chunked(logBuffer + logCount % logSize, logSize
                                - logCount % logSize);
        }
        cyg_httpd_write_chunked(logBuffer, writePtr);
        cyg_httpd_end_chunked();
        return -1;
}

CYG_HTTPD_HANDLER_TABLE_ENTRY(show_log, "/ram/log", show_log_entry);

// Filesystem operations
static int logfs_mount(cyg_fstab_entry *fste, cyg_mtab_entry *mte);
static int logfs_umount(cyg_mtab_entry *mte);
static int logfs_open(cyg_mtab_entry *mte, cyg_dir dir, const char *name,
                int mode, cyg_file *fte);
static int logfs_fo_write(struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio);

// File operations
static int logfs_fo_fsync(struct CYG_FILE_TAG *fp, int mode);
static int logfs_fo_close(struct CYG_FILE_TAG *fp);

#include <cyg/io/devtab.h>

//==========================================================================
// Filesystem table entries

// -------------------------------------------------------------------------
// Fstab entry.
// This defines the entry in the filesystem table.
// For simplicity we use _FILESYSTEM synchronization for all accesses since
// we should never block in any filesystem operations.
FSTAB_ENTRY(logfs_fste, "logfs", 0,
                CYG_SYNCMODE_FILE_FILESYSTEM | CYG_SYNCMODE_IO_FILESYSTEM,
                logfs_mount,
                logfs_umount,
                logfs_open,
                (cyg_fsop_unlink *)cyg_fileio_erofs,
                (cyg_fsop_mkdir *)cyg_fileio_erofs,
                (cyg_fsop_rmdir *)cyg_fileio_erofs,
                (cyg_fsop_rename *)cyg_fileio_erofs,
                (cyg_fsop_link *)cyg_fileio_erofs,
                (cyg_fsop_opendir *)cyg_fileio_erofs,
                (cyg_fsop_chdir *)cyg_fileio_erofs,
                (cyg_fsop_stat *)cyg_fileio_erofs,
                (cyg_fsop_getinfo *)cyg_fileio_erofs,
                (cyg_fsop_setinfo *)cyg_fileio_erofs);

// -------------------------------------------------------------------------
// File operations.
// This set of file operations are used for normal open files.

static cyg_fileops logfs_fileops =
{ (cyg_fileop_read *) cyg_fileio_erofs, (cyg_fileop_write *) logfs_fo_write,
                (cyg_fileop_lseek *) cyg_fileio_erofs,
                (cyg_fileop_ioctl *) cyg_fileio_erofs, cyg_fileio_seltrue,
                logfs_fo_fsync, logfs_fo_close, (cyg_fileop_fstat *) cyg_fileio_erofs,
                (cyg_fileop_getinfo *) cyg_fileio_erofs,
                (cyg_fileop_setinfo *) cyg_fileio_erofs, };

// -------------------------------------------------------------------------
// logfs_mount()
// Process a mount request. This mainly finds root for the
// filesystem.

static int logfs_mount(cyg_fstab_entry *fste, cyg_mtab_entry *mte)
{
        return ENOERR;
}

static int logfs_umount(cyg_mtab_entry *mte)
{
        return ENOERR;
}

static int logfs_open(cyg_mtab_entry *mte, cyg_dir dir, const char *name,
                int mode, cyg_file *file)
{
        file->f_flag |= mode & CYG_FILE_MODE_MASK;
        file->f_type = CYG_FILE_TYPE_FILE;
        file->f_ops = &logfs_fileops;
        file->f_offset = 0;
        file->f_data = 0;
        file->f_xops = 0;
        return ENOERR;
}

// -------------------------------------------------------------------------
// logfs_fo_write()
// Write data to file.

static int logfs_fo_write(struct CYG_FILE_TAG *fp, struct CYG_UIO_TAG *uio)
{
        int i;
        for (i = 0; i < uio->uio_iovcnt; i++)
        {
                cyg_iovec *iov = &uio->uio_iov[i];
                char *buf = (char *) iov->iov_base;
                off_t len = iov->iov_len;

                diag_write(buf, len);
        }
        uio->uio_resid = 0;

        return ENOERR;
}
static int logfs_fo_fsync(struct CYG_FILE_TAG *fp, int mode)
{
        return ENOERR;
}

// -------------------------------------------------------------------------
// romfs_fo_close()
// Close a file. We just clear out the data pointer.

static int logfs_fo_close(struct CYG_FILE_TAG *fp)
{
        return ENOERR;
}

int loadFile(const char *fileName, void **data, int *len);

/* boolean parameter stored on config */
int boolParam(char *var)
{
        bool result = false;
        char *name = alloc_printf("%s/%s", zylin_config_dir, var);
        if (name == NULL)
                return result;

        void *data;
        int len;
        if (loadFile(name, &data, &len) == ERROR_OK)
        {
                if (len > 1)
                        len = 1;
                result = strncmp((char *) data, "1", len) == 0;
                free(data);
        }
        free(name);
        return result;
}