[75] | 1 | /* |
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| 2 | * soclib_tty.c - soclib tty driver implementation. |
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| 3 | * |
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| 4 | * Author Alain Greiner (2016) |
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| 5 | * |
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| 6 | * Copyright (c) UPMC Sorbonne Universites |
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| 7 | * |
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| 8 | * This file is part of ALMOS-MKH.. |
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| 9 | * |
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| 10 | * ALMOS-MKH. is free software; you can redistribute it and/or modify it |
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| 11 | * under the terms of the GNU General Public License as published by |
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| 12 | * the Free Software Foundation; version 2.0 of the License. |
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| 13 | * |
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| 14 | * ALMOS-MKH. is distributed in the hope that it will be useful, but |
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| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 17 | * General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with ALMOS-MKH.; if not, write to the Free Software Foundation, |
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| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 22 | */ |
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| 23 | |
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| 24 | #include <dev_txt.h> |
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| 25 | #include <chdev.h> |
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| 26 | #include <soclib_tty.h> |
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| 27 | #include <remote_spinlock.h> |
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| 28 | #include <thread.h> |
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[407] | 29 | #include <printk.h> |
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[75] | 30 | #include <hal_special.h> |
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| 31 | |
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[438] | 32 | #if (DEBUG_SYS_READ & 1) |
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[435] | 33 | extern uint32_t enter_tty_cmd_read; |
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| 34 | extern uint32_t exit_tty_cmd_read; |
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[407] | 35 | |
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[435] | 36 | extern uint32_t enter_tty_isr_read; |
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| 37 | extern uint32_t exit_tty_isr_read; |
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[407] | 38 | #endif |
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| 39 | |
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[438] | 40 | #if (DEBUG_SYS_WRITE & 1) |
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[435] | 41 | extern uint32_t enter_tty_cmd_write; |
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| 42 | extern uint32_t exit_tty_cmd_write; |
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| 43 | |
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| 44 | extern uint32_t enter_tty_isr_write; |
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| 45 | extern uint32_t exit_tty_isr_write; |
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| 46 | #endif |
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| 47 | |
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[436] | 48 | //////////////////////////////////////////////////////////////////////////////////// |
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| 49 | // These global variables implement the TTY_RX FIFOs (one per channel) |
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| 50 | //////////////////////////////////////////////////////////////////////////////////// |
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| 51 | |
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| 52 | __attribute__((section(".kdata"))) |
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| 53 | tty_fifo_t tty_rx_fifo[CONFIG_MAX_TXT_CHANNELS]; |
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| 54 | |
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| 55 | __attribute__((section(".kdata"))) |
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| 56 | tty_fifo_t tty_tx_fifo[CONFIG_MAX_TXT_CHANNELS]; |
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| 57 | |
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[75] | 58 | /////////////////////////////////////// |
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| 59 | void soclib_tty_init( chdev_t * chdev ) |
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| 60 | { |
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[407] | 61 | xptr_t reg_xp; |
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| 62 | |
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[436] | 63 | // initialise function pointers in chdev |
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[77] | 64 | chdev->cmd = &soclib_tty_cmd; |
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| 65 | chdev->isr = &soclib_tty_isr; |
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[407] | 66 | chdev->aux = &soclib_tty_aux; |
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[77] | 67 | |
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[407] | 68 | // get TTY channel and extended pointer on TTY peripheral base address |
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| 69 | xptr_t tty_xp = chdev->base; |
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| 70 | uint32_t channel = chdev->channel; |
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[436] | 71 | bool_t is_rx = chdev->is_rx; |
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[75] | 72 | |
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| 73 | // get SOCLIB_TTY device cluster and local pointer |
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| 74 | cxy_t tty_cxy = GET_CXY( tty_xp ); |
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[435] | 75 | uint32_t * tty_ptr = GET_PTR( tty_xp ); |
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[75] | 76 | |
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[435] | 77 | // set TTY_RX_IRQ_ENABLE |
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[407] | 78 | reg_xp = XPTR( tty_cxy , tty_ptr + (channel * TTY_SPAN) + TTY_RX_IRQ_ENABLE ); |
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[435] | 79 | hal_remote_sw( reg_xp , 1 ); |
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[407] | 80 | |
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| 81 | // reset TTY_TX_IRQ_ENABLE |
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| 82 | reg_xp = XPTR( tty_cxy , tty_ptr + (channel * TTY_SPAN) + TTY_TX_IRQ_ENABLE ); |
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| 83 | hal_remote_sw( reg_xp , 0 ); |
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[75] | 84 | |
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[436] | 85 | // reset relevant FIFO |
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| 86 | if( is_rx ) |
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| 87 | { |
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| 88 | tty_rx_fifo[channel].sts = 0; |
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| 89 | tty_rx_fifo[channel].ptr = 0; |
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| 90 | tty_rx_fifo[channel].ptw = 0; |
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| 91 | } |
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| 92 | else |
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| 93 | { |
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| 94 | tty_tx_fifo[channel].sts = 0; |
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| 95 | tty_tx_fifo[channel].ptr = 0; |
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| 96 | tty_tx_fifo[channel].ptw = 0; |
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| 97 | } |
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| 98 | } // end soclib_tty_init() |
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| 99 | |
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[75] | 100 | ////////////////////////////////////////////////////////////// |
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| 101 | void __attribute__ ((noinline)) soclib_tty_cmd( xptr_t th_xp ) |
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| 102 | { |
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[436] | 103 | tty_fifo_t * fifo; // TTY_RX or TTY_TX FIFO |
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| 104 | char byte; // byte value |
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| 105 | uint32_t done; // number of bytes moved |
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[407] | 106 | |
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[436] | 107 | // get client thread cluster and local pointer |
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| 108 | cxy_t th_cxy = GET_CXY( th_xp ); |
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| 109 | thread_t * th_ptr = GET_PTR( th_xp ); |
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| 110 | |
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| 111 | // get command arguments |
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| 112 | uint32_t type = hal_remote_lw ( XPTR( th_cxy , &th_ptr->txt_cmd.type ) ); |
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| 113 | xptr_t buf_xp = hal_remote_lwd( XPTR( th_cxy , &th_ptr->txt_cmd.buf_xp ) ); |
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| 114 | uint32_t count = hal_remote_lw ( XPTR( th_cxy , &th_ptr->txt_cmd.count ) ); |
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| 115 | xptr_t error_xp = XPTR( th_cxy , &th_ptr->txt_cmd.error ); |
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| 116 | |
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[438] | 117 | #if (DEBUG_SYS_READ & 1) |
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[435] | 118 | if( type == TXT_READ) enter_tty_cmd_read = (uint32_t)hal_get_cycles(); |
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[407] | 119 | #endif |
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| 120 | |
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[438] | 121 | #if (DEBUG_SYS_WRITE & 1) |
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[435] | 122 | if( type == TXT_WRITE) enter_tty_cmd_write = (uint32_t)hal_get_cycles(); |
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[432] | 123 | #endif |
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[407] | 124 | |
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[438] | 125 | #if DEBUG_HAL_TXT_RX |
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[436] | 126 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 127 | if( (DEBUG_HAL_TXT_RX < cycle) && (type == TXT_READ) ) |
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[436] | 128 | printk("\n[DBG] %s : thread %x enter for RX / cycle %d\n", |
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| 129 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
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| 130 | #endif |
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[75] | 131 | |
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[438] | 132 | #if DEBUG_HAL_TXT_TX |
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[435] | 133 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 134 | if( (DEBUG_HAL_TXT_TX < cycle) && (type == TXT_WRITE) ) |
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[436] | 135 | printk("\n[DBG] %s : thread %x enter for TX / cycle %d\n", |
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| 136 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
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[435] | 137 | #endif |
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[407] | 138 | |
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[440] | 139 | // get TXT device cluster and pointers |
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| 140 | xptr_t dev_xp = (xptr_t)hal_remote_lwd( XPTR( th_cxy , &th_ptr->txt_cmd.dev_xp ) ); |
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| 141 | cxy_t dev_cxy = GET_CXY( dev_xp ); |
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| 142 | chdev_t * dev_ptr = GET_PTR( dev_xp ); |
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[436] | 143 | |
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[440] | 144 | // get cluster and pointers for SOCLIB_TTY peripheral base segment |
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| 145 | xptr_t tty_xp = (xptr_t)hal_remote_lwd( XPTR( dev_cxy , &dev_ptr->base ) ); |
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[436] | 146 | cxy_t tty_cxy = GET_CXY( tty_xp ); |
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| 147 | uint32_t * tty_ptr = GET_PTR( tty_xp ); |
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| 148 | |
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| 149 | // get TTY channel index and channel base address |
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| 150 | uint32_t channel = hal_remote_lw( XPTR( dev_cxy , &dev_ptr->channel ) ); |
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| 151 | uint32_t * base = tty_ptr + TTY_SPAN * channel; |
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| 152 | |
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| 153 | /////////////////////// |
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| 154 | if( type == TXT_WRITE ) // write bytes to TTY_TX FIFO |
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[435] | 155 | { |
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[436] | 156 | fifo = &tty_tx_fifo[channel]; |
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[75] | 157 | |
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[436] | 158 | done = 0; |
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[75] | 159 | |
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[436] | 160 | while( done < count ) |
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| 161 | { |
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| 162 | if( fifo->sts < TTY_FIFO_DEPTH ) // put one byte to FIFO if TX_FIFO not full |
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| 163 | { |
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| 164 | // get one byte from command buffer |
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| 165 | byte = hal_remote_lb( buf_xp + done ); |
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[75] | 166 | |
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[436] | 167 | // write byte to FIFO |
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| 168 | fifo->data[fifo->ptw] = byte; |
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[75] | 169 | |
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[436] | 170 | // prevent race |
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| 171 | hal_fence(); |
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[75] | 172 | |
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[436] | 173 | // update FIFO state |
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| 174 | fifo->ptw = (fifo->ptw + 1) % TTY_FIFO_DEPTH; |
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| 175 | hal_atomic_add( &fifo->sts , 1 ); |
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[75] | 176 | |
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[436] | 177 | // udate number of bytes moved |
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| 178 | done++; |
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[75] | 179 | |
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[436] | 180 | // enable TX_IRQ |
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| 181 | hal_remote_sw( XPTR( tty_cxy , base + TTY_TX_IRQ_ENABLE ) , 1 ); |
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| 182 | } |
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| 183 | else // block & deschedule if TX_FIFO full |
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| 184 | { |
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| 185 | // block on ISR |
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| 186 | thread_block( XPTR( local_cxy , CURRENT_THREAD ) , THREAD_BLOCKED_ISR ); |
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| 187 | |
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| 188 | // deschedule |
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| 189 | sched_yield( "TTY_TX_FIFO full" ); |
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| 190 | } |
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| 191 | } |
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| 192 | |
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| 193 | // set error status in command and return |
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| 194 | hal_remote_sw( error_xp , 0 ); |
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[435] | 195 | } |
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[436] | 196 | /////////////////////////// |
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| 197 | else if( type == TXT_READ ) // read bytes from TTY_RX FIFO |
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[435] | 198 | { |
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[436] | 199 | fifo = &tty_rx_fifo[channel]; |
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[75] | 200 | |
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[436] | 201 | done = 0; |
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| 202 | |
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| 203 | while( done < count ) |
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| 204 | { |
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| 205 | if( fifo->sts > 0 ) // get byte from FIFO if not empty |
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| 206 | { |
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| 207 | // get one byte from FIFO |
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| 208 | char byte = fifo->data[fifo->ptr]; |
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| 209 | |
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| 210 | // update FIFO state |
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| 211 | fifo->ptr = (fifo->ptr + 1) % TTY_FIFO_DEPTH; |
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| 212 | hal_atomic_add( &fifo->sts , -1 ); |
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| 213 | |
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| 214 | // set byte to command buffer |
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| 215 | hal_remote_sb( buf_xp + done , byte ); |
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| 216 | |
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| 217 | // udate number of bytes |
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| 218 | done++; |
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| 219 | } |
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| 220 | else // deschedule if FIFO empty |
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| 221 | { |
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| 222 | // block on ISR |
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| 223 | thread_block( XPTR( local_cxy , CURRENT_THREAD ) , THREAD_BLOCKED_ISR ); |
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| 224 | |
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| 225 | // deschedule |
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| 226 | sched_yield( "TTY_TX_FIFO_RX empty" ); |
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| 227 | } |
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| 228 | } // end while |
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| 229 | |
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| 230 | // set error status in command |
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| 231 | hal_remote_sw( error_xp , 0 ); |
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[435] | 232 | } |
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| 233 | else |
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| 234 | { |
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| 235 | assert( false , __FUNCTION__ , "illegal TXT command\n" ); |
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| 236 | } |
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| 237 | |
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[438] | 238 | #if DEBUG_HAL_TXT_RX |
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[432] | 239 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 240 | if( (DEBUG_HAL_TXT_RX < cycle) && (type == TXT_READ) ) |
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[436] | 241 | printk("\n[DBG] %s : thread %x exit after RX / cycle %d\n", |
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| 242 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
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[432] | 243 | #endif |
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[407] | 244 | |
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[438] | 245 | #if DEBUG_HAL_TXT_TX |
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[436] | 246 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 247 | if( (DEBUG_HAL_TXT_TX < cycle) && (type == TXT_WRITE) ) |
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[436] | 248 | printk("\n[DBG] %s : thread %x exit after TX / cycle %d\n", |
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| 249 | __FUNCTION__ , CURRENT_THREAD , cycle ); |
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| 250 | #endif |
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| 251 | |
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[438] | 252 | #if (DEBUG_SYS_READ & 1) |
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[435] | 253 | if( type == TXT_READ ) exit_tty_cmd_read = (uint32_t)hal_get_cycles(); |
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[407] | 254 | #endif |
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| 255 | |
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[438] | 256 | #if (DEBUG_SYS_WRITE & 1) |
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[435] | 257 | if( type == TXT_WRITE ) exit_tty_cmd_write = (uint32_t)hal_get_cycles(); |
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| 258 | #endif |
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| 259 | |
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[407] | 260 | } // end soclib_tty_cmd() |
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| 261 | |
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[75] | 262 | ///////////////////////////////////////////////////////////////// |
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| 263 | void __attribute__ ((noinline)) soclib_tty_isr( chdev_t * chdev ) |
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| 264 | { |
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[436] | 265 | thread_t * server; // pointer on TXT chdev server thread |
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| 266 | lid_t server_lid; // local index of core running the server thread |
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| 267 | uint32_t channel; // TXT chdev channel |
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| 268 | bool_t is_rx; // TXT chdev direction |
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| 269 | char byte; // byte value |
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| 270 | xptr_t owner_xp; // extended pointer on foreground process in owner cluster |
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| 271 | cxy_t owner_cxy; |
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| 272 | process_t * owner_ptr; |
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| 273 | pid_t owner_pid; |
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| 274 | tty_fifo_t * fifo; // pointer on TTY_TX or TTY_RX FIFO |
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| 275 | cxy_t tty_cxy; // soclib_tty cluster |
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| 276 | uint32_t * tty_ptr; // soclib_tty segment base address |
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| 277 | uint32_t * base; // soclib_tty channel base address |
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| 278 | xptr_t status_xp; // extended pointer on TTY_STATUS register |
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| 279 | xptr_t write_xp; // extended pointer on TTY_WRITE register |
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| 280 | xptr_t read_xp; // extended pointer on TTY_READ register |
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[75] | 281 | |
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[436] | 282 | // get TXT chdev channel, direction and server thread |
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| 283 | channel = chdev->channel; |
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| 284 | is_rx = chdev->is_rx; |
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| 285 | server = chdev->server; |
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| 286 | server_lid = server->core->lid; |
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| 287 | |
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[438] | 288 | #if (DEBUG_SYS_READ & 1) |
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[436] | 289 | if( is_rx ) enter_tty_isr_read = (uint32_t)hal_get_cycles(); |
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[407] | 290 | #endif |
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| 291 | |
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[438] | 292 | #if (DEBUG_SYS_WRITE & 1) |
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[436] | 293 | if( is_rx == 0 ) enter_tty_isr_write = (uint32_t)hal_get_cycles(); |
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[435] | 294 | #endif |
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| 295 | |
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[438] | 296 | #if DEBUG_HAL_TXT_RX |
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[432] | 297 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 298 | if( (DEBUG_HAL_TXT_RX < cycle) && is_rx ) |
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[436] | 299 | printk("\n[DBG] %s : enter for RX / cycle %d\n", __FUNCTION__ , cycle ); |
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[432] | 300 | #endif |
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| 301 | |
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[438] | 302 | #if DEBUG_HAL_TXT_TX |
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[436] | 303 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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[438] | 304 | if( (DEBUG_HAL_TXT_TX < cycle) && (is_rx == 0) ) |
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[436] | 305 | printk("\n[DBG] %s : enter for TX / cycle %d\n", __FUNCTION__ , cycle ); |
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| 306 | #endif |
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[75] | 307 | |
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[424] | 308 | // get SOCLIB_TTY peripheral cluster and local pointer |
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[436] | 309 | tty_cxy = GET_CXY( chdev->base ); |
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| 310 | tty_ptr = GET_PTR( chdev->base ); |
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[424] | 311 | |
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| 312 | // get channel base address |
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[436] | 313 | base = tty_ptr + TTY_SPAN * channel; |
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[424] | 314 | |
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| 315 | // get extended pointer on TTY registers |
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| 316 | status_xp = XPTR( tty_cxy , base + TTY_STATUS ); |
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| 317 | write_xp = XPTR( tty_cxy , base + TTY_WRITE ); |
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| 318 | read_xp = XPTR( tty_cxy , base + TTY_READ ); |
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| 319 | |
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[436] | 320 | /////////////////////////// handle RX ////////////////////// |
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| 321 | if( is_rx ) |
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[424] | 322 | { |
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[436] | 323 | fifo = &tty_rx_fifo[channel]; |
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[424] | 324 | |
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[436] | 325 | // try to move bytes until TTY_READ register empty |
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| 326 | while( hal_remote_lw( status_xp ) & TTY_STATUS_RX_FULL ) |
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[435] | 327 | { |
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[436] | 328 | // get one byte from TTY_READ register & acknowledge RX_IRQ |
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| 329 | byte = (char)hal_remote_lb( read_xp ); |
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[424] | 330 | |
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[436] | 331 | // filter special character ^Z |
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| 332 | if( byte == 0x1A ) |
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| 333 | { |
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| 334 | // get pointers on TXT owner process in owner cluster |
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| 335 | owner_xp = process_txt_get_owner( channel ); |
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| 336 | |
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| 337 | // check process exist |
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| 338 | assert( (owner_xp != XPTR_NULL) , __FUNCTION__, |
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| 339 | "TXT owner process not found\n" ); |
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[435] | 340 | |
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[436] | 341 | // get relevant infos on owner process |
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| 342 | owner_cxy = GET_CXY( owner_xp ); |
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| 343 | owner_ptr = GET_PTR( owner_xp ); |
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| 344 | owner_pid = hal_remote_lw( XPTR( owner_cxy , &owner_ptr->pid ) ); |
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[424] | 345 | |
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[440] | 346 | // block owner process only if it is not INIT or KSH |
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[436] | 347 | if( process_get_ppid( owner_xp ) > 1 ) |
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| 348 | { |
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| 349 | // send stop signal to owner process |
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| 350 | process_sigaction( owner_pid , BLOCK_ALL_THREADS ); |
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[424] | 351 | |
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[436] | 352 | // atomically update owner process termination state |
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| 353 | hal_remote_atomic_or( XPTR( owner_cxy , &owner_ptr->term_state ) , |
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| 354 | PROCESS_TERM_STOP ); |
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| 355 | return; |
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| 356 | } |
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| 357 | } |
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| 358 | |
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| 359 | // filter special character ^C |
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| 360 | if( byte == 0x03 ) |
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| 361 | { |
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[440] | 362 | // get pointer on TXT owner process in owner cluster |
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[436] | 363 | owner_xp = process_txt_get_owner( channel ); |
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| 364 | |
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| 365 | // check process exist |
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| 366 | assert( (owner_xp != XPTR_NULL) , __FUNCTION__, |
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| 367 | "TXT owner process not found\n" ); |
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| 368 | |
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| 369 | // get relevant infos on TXT owner process |
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| 370 | owner_cxy = GET_CXY( owner_xp ); |
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| 371 | owner_ptr = GET_PTR( owner_xp ); |
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| 372 | owner_pid = hal_remote_lw( XPTR( owner_cxy , &owner_ptr->pid ) ); |
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| 373 | |
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| 374 | // kill TXT owner process only if it is not INIT |
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| 375 | if( owner_pid != 1 ) |
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| 376 | { |
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| 377 | // remove process from TXT list |
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| 378 | process_txt_detach( owner_xp ); |
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| 379 | |
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[440] | 380 | // mark for delete all thread in all clusters, but the main |
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[436] | 381 | process_sigaction( owner_pid , DELETE_ALL_THREADS ); |
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[435] | 382 | |
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[436] | 383 | // get pointer on target process main thread |
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| 384 | xptr_t main_xp = XPTR( owner_cxy , &owner_ptr->th_tbl[0] ); |
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[424] | 385 | |
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[436] | 386 | // block main thread |
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| 387 | thread_block( main_xp , THREAD_BLOCKED_GLOBAL ); |
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[435] | 388 | |
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[436] | 389 | // atomically update owner process termination state |
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| 390 | hal_remote_atomic_or( XPTR( owner_cxy , &owner_ptr->term_state ) , |
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| 391 | PROCESS_TERM_KILL ); |
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| 392 | return; |
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| 393 | } |
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| 394 | } |
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[424] | 395 | |
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[436] | 396 | // write byte in TTY_RX FIFO if not full / discard byte if full |
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| 397 | if ( fifo->sts < TTY_FIFO_DEPTH ) |
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| 398 | { |
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| 399 | // store byte into FIFO |
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| 400 | fifo->data[fifo->ptw] = (char)byte; |
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| 401 | |
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| 402 | // avoid race |
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| 403 | hal_fence(); |
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| 404 | |
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| 405 | // update RX_FIFO state |
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| 406 | fifo->ptw = (fifo->ptw + 1) % TTY_FIFO_DEPTH; |
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| 407 | hal_atomic_add( &fifo->sts , 1 ); |
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| 408 | |
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| 409 | // unblock TXT_RX server thread |
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| 410 | thread_unblock( XPTR( local_cxy , server ) , THREAD_BLOCKED_ISR ); |
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| 411 | |
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| 412 | // send IPI to core running server thread |
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| 413 | dev_pic_send_ipi( local_cxy , server_lid ); |
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| 414 | } |
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| 415 | else |
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| 416 | { |
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| 417 | printk("\n[WARNING] %s : TTY_RX_FIFO[%d] full => discard character <%x>\n", |
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| 418 | __FUNCTION__, channel, (uint32_t)byte ); |
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| 419 | } |
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| 420 | } // end while TTY_READ register full |
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| 421 | |
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| 422 | } // end RX |
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| 423 | |
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| 424 | /////////////////////// handle TX ///////////////////////////// |
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| 425 | else |
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[424] | 426 | { |
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[436] | 427 | fifo = &tty_tx_fifo[channel]; |
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| 428 | |
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| 429 | // try to move bytes until TX_FIFO empty |
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| 430 | while( fifo->sts > 0 ) |
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[424] | 431 | { |
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[436] | 432 | // write one byte to TTY_WRITE register if empty / exit while if full |
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| 433 | if( (hal_remote_lw( status_xp ) & TTY_STATUS_TX_FULL) == 0 ) |
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[424] | 434 | { |
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[436] | 435 | // get one byte from TX_FIFO |
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| 436 | byte = fifo->data[fifo->ptr]; |
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[424] | 437 | |
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[436] | 438 | // update TX_FIFO state |
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| 439 | fifo->ptr = (fifo->ptr + 1) % TTY_FIFO_DEPTH; |
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| 440 | hal_atomic_add( &fifo->sts , -1 ); |
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| 441 | |
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| 442 | // write byte to TTY_WRITE register & acknowledge TX_IRQ |
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[424] | 443 | hal_remote_sb( write_xp , byte ); |
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| 444 | } |
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| 445 | } |
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| 446 | |
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[435] | 447 | // disable TX_IRQ |
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| 448 | hal_remote_sw( XPTR( tty_cxy , base + TTY_TX_IRQ_ENABLE ) , 0 ); |
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[424] | 449 | |
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[436] | 450 | // unblock TXT_TX server thread |
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| 451 | thread_unblock( XPTR( local_cxy , server ) , THREAD_BLOCKED_ISR ); |
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[424] | 452 | |
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[436] | 453 | // send IPI to core running server thread |
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| 454 | dev_pic_send_ipi( local_cxy , server_lid ); |
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| 455 | } // end TX |
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| 456 | |
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[435] | 457 | hal_fence(); |
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[424] | 458 | |
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[438] | 459 | #if DEBUG_HAL_TXT_RX |
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[435] | 460 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 461 | if( (DEBUG_HAL_TXT_RX < cycle) && is_rx ) |
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[436] | 462 | printk("\n[DBG] %s : exit after RX / cycle %d\n", __FUNCTION__, cycle ); |
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[435] | 463 | #endif |
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[424] | 464 | |
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[438] | 465 | #if DEBUG_HAL_TXT_TX |
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[436] | 466 | cycle = (uint32_t)hal_get_cycles(); |
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[438] | 467 | if( (DEBUG_HAL_TXT_TX < cycle) && (is_rx == 0) ) |
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[436] | 468 | printk("\n[DBG] %s : exit after TX / cycle %d\n", __FUNCTION__, cycle ); |
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| 469 | #endif |
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| 470 | |
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[438] | 471 | #if (DEBUG_SYS_READ & 1) |
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[436] | 472 | if( is_rx ) exit_tty_isr_read = (uint32_t)hal_get_cycles(); |
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[424] | 473 | #endif |
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| 474 | |
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[438] | 475 | #if (DEBUG_SYS_WRITE & 1) |
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[436] | 476 | if( is_rx == 0 ) exit_tty_isr_write = (uint32_t)hal_get_cycles(); |
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[435] | 477 | #endif |
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| 478 | |
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[424] | 479 | } // end soclib_tty_isr() |
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| 480 | |
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[436] | 481 | ///////////////////////////////////////////////////////////// |
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| 482 | void __attribute__ ((noinline)) soclib_tty_aux( void * args ) |
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| 483 | { |
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| 484 | uint32_t status; |
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| 485 | bool_t empty; |
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| 486 | uint32_t i; |
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| 487 | |
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| 488 | xptr_t dev_xp = ((txt_sync_args_t *)args)->dev_xp; |
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| 489 | char * buffer = ((txt_sync_args_t *)args)->buffer; |
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| 490 | uint32_t count = ((txt_sync_args_t *)args)->count; |
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| 491 | |
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| 492 | // get TXT0 chdev cluster and local pointer |
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| 493 | cxy_t dev_cxy = GET_CXY( dev_xp ); |
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| 494 | chdev_t * dev_ptr = (chdev_t *)GET_PTR( dev_xp ); |
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| 495 | |
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| 496 | // get extended pointer on TTY channel base address |
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| 497 | xptr_t tty_xp = (xptr_t)hal_remote_lwd( XPTR( dev_cxy , &dev_ptr->base ) ); |
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| 498 | |
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| 499 | // get TTY channel segment cluster and local pointer |
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| 500 | cxy_t tty_cxy = GET_CXY( tty_xp ); |
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| 501 | uint32_t * tty_ptr = (uint32_t *)GET_PTR( tty_xp ); |
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| 502 | |
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| 503 | // get extended pointers on TTY_WRITE & TTY_STATUS registers |
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| 504 | xptr_t write_xp = XPTR( tty_cxy , tty_ptr + TTY_WRITE ); |
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| 505 | xptr_t status_xp = XPTR( tty_cxy , tty_ptr + TTY_STATUS ); |
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| 506 | |
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| 507 | // loop on characters (busy waiting policy) |
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| 508 | for( i = 0 ; i < count ; i++ ) |
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| 509 | { |
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| 510 | do |
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| 511 | { |
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| 512 | // get TTY_STATUS |
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| 513 | status = hal_remote_lw( status_xp ); |
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| 514 | empty = ( (status & TTY_STATUS_TX_FULL) == 0 ); |
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| 515 | |
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| 516 | // transfer one byte if TX buffer empty |
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| 517 | if ( empty ) hal_remote_sb( write_xp , buffer[i] ); |
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| 518 | } |
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| 519 | while ( empty == false ); |
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| 520 | } |
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| 521 | } // end soclib_tty_aux() |
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| 522 | |
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| 523 | |
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| 524 | |
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