hal_diag.c

来自「eCos操作系统源码」· C语言 代码 · 共 618 行 · 第 1/2 页

    int delay_count;
    channel_data_t* chan = (channel_data_t*)__ch_data;
    cyg_bool res;
    CYGARC_HAL_SAVE_GP();

    delay_count = chan->msec_timeout * 10; // delay in .1 ms steps
    for(;;) {
        res = cyg_hal_plf_serial_getc_nonblock(__ch_data, ch);
        if (res || 0 == delay_count--)
            break;
        
        CYGACC_CALL_IF_DELAY_US(100);
    }

    CYGARC_HAL_RESTORE_GP();
    return res;
}

static int
cyg_hal_plf_serial_control(void *__ch_data, __comm_control_cmd_t __func, ...)
{
    static int irq_state = 0;
    channel_data_t* chan = (channel_data_t*)__ch_data;
    
    int ret = 0;
    CYGARC_HAL_SAVE_GP();

    switch (__func) {
    case __COMMCTL_GETBAUD:
        ret = chan->baud_rate;
        break;
    case __COMMCTL_SETBAUD:
        {
        va_list ap;
        va_start(ap, __func);
	
        ret = chan->baud_rate;
        chan->baud_rate = va_arg(ap, cyg_int32);
        init_serial_channel(chan);
	
        va_end(ap);
        }
        break;
    case __COMMCTL_IRQ_ENABLE:
	    // Just enable the interrupt on the IMB3. The debugged application is
        // must make sure that the interrupt is properly decoded
        HAL_INTERRUPT_UNMASK(chan->imb3_vector);
        irq_state = 1;
        break;
    case __COMMCTL_IRQ_DISABLE:
		// Same remark as above
        ret = irq_state;
        irq_state = 0;
        HAL_INTERRUPT_MASK(chan->imb3_vector);
        break;
    case __COMMCTL_DBG_ISR_VECTOR:
        ret = chan->imb3_vector;
        break;
    case __COMMCTL_SET_TIMEOUT:
        {
        va_list ap;
        va_start(ap, __func);

        ret = chan->msec_timeout;
        chan->msec_timeout = va_arg(ap, cyg_uint32);

        va_end(ap);
        }        
        break;
    default:
        break;
    }
    CYGARC_HAL_RESTORE_GP();
    return ret;
}

static int
cyg_hal_plf_serial_isr(void *__ch_data, int* __ctrlc, 
                       CYG_ADDRWORD __vector, CYG_ADDRWORD __data)
{
    int res = 0;
    
    cyg_uint16 status;
    cyg_uint16 control;

    cyg_uint16 * base = ((channel_data_t *)__ch_data)->base;
    
    CYGARC_HAL_SAVE_GP();

    *__ctrlc = 0;

    HAL_READ_UINT16(base+CYG_DEV_SERIAL_RS232_SCSR, status);
    HAL_READ_UINT16(base+CYG_DEV_SERIAL_RS232_SCCR1, control);

    if((status & SCSR_RDRF) && (control & SCCR1_RIE))
    {   // Only if the interrupt was caused by the channel
        cyg_uint8 c;
        c = cyg_hal_plf_serial_getc(__ch_data);
	
        if(cyg_hal_is_break(&c, 1))
	    *__ctrlc = 1;
	
        HAL_INTERRUPT_ACKNOWLEDGE(((channel_data_t *)__ch_data)->imb3_vector);
        res = CYG_ISR_HANDLED;
    }

    CYGARC_HAL_RESTORE_GP();
    return res;
}

static void
cyg_hal_plf_serial_init(void)
{
    hal_virtual_comm_table_t* comm;
    int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);

    // Disable interrupts.
    HAL_INTERRUPT_MASK(channels[0].imb3_vector);
    HAL_INTERRUPT_MASK(channels[1].imb3_vector);

    // Init channels
    init_serial_channel(&channels[0]);
    init_serial_channel(&channels[1]);

    // Setup procs in the vector table

    // Set channel 0
    CYGACC_CALL_IF_SET_CONSOLE_COMM(0);
    comm = CYGACC_CALL_IF_CONSOLE_PROCS();
    CYGACC_COMM_IF_CH_DATA_SET(*comm, &channels[0]);
    CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_plf_serial_write);
    CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_plf_serial_read);
    CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_plf_serial_putc);
    CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_plf_serial_getc);
    CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_plf_serial_control);
    CYGACC_COMM_IF_DBG_ISR_SET(*comm, cyg_hal_plf_serial_isr);
    CYGACC_COMM_IF_GETC_TIMEOUT_SET(*comm, cyg_hal_plf_serial_getc_timeout);

    // Set channel 1
    CYGACC_CALL_IF_SET_CONSOLE_COMM(1);
    comm = CYGACC_CALL_IF_CONSOLE_PROCS();
    CYGACC_COMM_IF_CH_DATA_SET(*comm, &channels[1]);
    CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_plf_serial_write);
    CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_plf_serial_read);
    CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_plf_serial_putc);
    CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_plf_serial_getc);
    CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_plf_serial_control);
    CYGACC_COMM_IF_DBG_ISR_SET(*comm, cyg_hal_plf_serial_isr);
    CYGACC_COMM_IF_GETC_TIMEOUT_SET(*comm, cyg_hal_plf_serial_getc_timeout);
    
    // Restore original console
    CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
}

//=============================================================================
// Compatibility with older stubs
//=============================================================================
#ifndef CYGSEM_HAL_VIRTUAL_VECTOR_DIAG

#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
#include <cyg/hal/hal_stub.h>           // CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION
#endif

//-----------------------------------------------------------------------------
// Assumption: all diagnostic output must be GDB packetized unless
// this is a configuration for a stand-alone ROM system.
#if defined(CYG_HAL_STARTUP_ROM) && !defined(CYGSEM_HAL_ROM_MONITOR)
# define HAL_DIAG_USES_HARDWARE
#endif

#if (CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL == 0)
# define __BASE ((cyg_uint16*)CYG_DEV_SERIAL_BASE_A)
#elif (CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL == 1)
# define __BASE ((cyg_uint16*)CYG_DEV_SERIAL_BASE_B)
#else
# error "Invalid console channel selection"
#endif

static channel_data_t channel = { __BASE, 0, 0 };

#ifdef HAL_DIAG_USES_HARDWARE

void hal_diag_init(void)
{
    init_serial_channel(&channel);
}

void hal_diag_write_char(char __c)
{
    cyg_hal_plf_serial_putc(&channel, __c);
}

void hal_diag_read_char(char *c)
{
    *c = cyg_hal_plf_serial_getc(&channel);
}

#else  // ifdef HAL_DIAG_USES_HARDWARE

// Initialize diag port
void
hal_diag_init(void)
{
    // Init devices
    init_serial_channel(&channel);
}

void 
hal_diag_write_char_serial( char c )
{
    unsigned long __state;
    HAL_DISABLE_INTERRUPTS(__state);
    cyg_hal_plf_serial_putc(&channel, c);
    HAL_RESTORE_INTERRUPTS(__state);
}

void
hal_diag_read_char(char *c)
{
    *c = cyg_hal_plf_serial_getc(&channel);
}

void 
hal_diag_write_char(char c)
{
    static char line[100];
    static int pos = 0;

    // No need to send CRs
    if( c == '\r' ) return;

    line[pos++] = c;

    if( c == '\n' || pos == sizeof(line) )
    {
        CYG_INTERRUPT_STATE old;

        // Disable interrupts. This prevents GDB trying to interrupt us
        // while we are in the middle of sending a packet. The serial
        // receive interrupt will be seen when we re-enable interrupts
        // later.
        
#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
        CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
#else
        HAL_DISABLE_INTERRUPTS(old);
#endif
        
        while(1)
        {
            char c1;
            static char hex[] = "0123456789ABCDEF";
            cyg_uint8 csum = 0;
            int i;
        
            hal_diag_write_char_serial('$');
            hal_diag_write_char_serial('O');
            csum += 'O';
            for( i = 0; i < pos; i++ )
            {
                char ch = line[i];
                char h = hex[(ch>>4)&0xF];
                char l = hex[ch&0xF];
                hal_diag_write_char_serial(h);
                hal_diag_write_char_serial(l);
                csum += h;
                csum += l;
            }
            hal_diag_write_char_serial('#');
            hal_diag_write_char_serial(hex[(csum>>4)&0xF]);
            hal_diag_write_char_serial(hex[csum&0xF]);

            // Wait for the ACK character '+' from GDB here and handle
            // receiving a ^C instead.
            hal_diag_read_char(&c1);

            if( c1 == '+' )
                break;              // a good acknowledge

#ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
            if( 3 == c1 ) {
                // Ctrl-C: breakpoint.
                cyg_hal_gdb_interrupt(
                    (target_register_t)__builtin_return_address(0));
                break;
            }
#endif
            // otherwise, loop round again
        }
        
        pos = 0;

        // And re-enable interrupts
#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
        CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
#else
        HAL_RESTORE_INTERRUPTS(old);
#endif
        
    }
}

#endif  // ifdef HAL_DIAG_USES_HARDWARE

#endif // CYGSEM_HAL_VIRTUAL_VECTOR_DIAG

//-----------------------------------------------------------------------------
// End of hal_diag.c