/***********************license start*************** * Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights * reserved. * * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * Neither the name of Cavium Networks nor the names of * its contributors may be used to endorse or promote products * derived from this software without specific prior written * permission. * This Software, including technical data, may be subject to U.S. export control * laws, including the U.S. Export Administration Act and its associated * regulations, and may be subject to export or import regulations in other * countries. * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" * AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR * WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO * THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR * DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM * SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE, * MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF * VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR * CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR * PERFORMANCE OF THE SOFTWARE LIES WITH YOU. ***********************license end**************************************/ #ifdef CVMX_BUILD_FOR_LINUX_KERNEL #include #include #include #include #include #include int cvmx_debug_uart = 1; #else #include #include "executive-config.h" #include "cvmx.h" #include "cvmx-debug.h" #include "cvmx-uart.h" #include "cvmx-spinlock.h" #ifndef __OCTEON_NEWLIB__ #include "../../bootloader/u-boot/include/octeon_mem_map.h" #else #include "octeon-boot-info.h" #endif #endif #ifdef __OCTEON_NEWLIB__ #pragma weak cvmx_uart_enable_intr int cvmx_debug_uart = 1; #endif /* Default to second uart port for backward compatibility. The default (if -debug does not set the uart number) can now be overridden with CVMX_DEBUG_COMM_UART_NUM. */ #ifndef CVMX_DEBUG_COMM_UART_NUM # define CVMX_DEBUG_COMM_UART_NUM 1 #endif static CVMX_SHARED cvmx_spinlock_t cvmx_debug_uart_lock; /** * Interrupt handler for debugger Control-C interrupts. * * @param irq_number IRQ interrupt number * @param registers CPU registers at the time of the interrupt * @param user_arg Unused user argument */ void cvmx_debug_uart_process_debug_interrupt(int irq_number, uint64_t registers[32], void *user_arg) { cvmx_uart_lsr_t lsrval; /* Check for a Control-C interrupt from the debugger. This loop will eat all input received on the uart */ lsrval.u64 = cvmx_read_csr(CVMX_MIO_UARTX_LSR(cvmx_debug_uart)); while (lsrval.s.dr) { int c = cvmx_read_csr(CVMX_MIO_UARTX_RBR(cvmx_debug_uart)); if (c == '\003') { register uint64_t tmp; #ifndef CVMX_BUILD_FOR_LINUX_KERNEL fflush(stderr); fflush(stdout); #endif /* Pulse MCD0 signal on Ctrl-C to stop all the cores. Also set the MCD0 to be not masked by this core so we know the signal is received by someone */ asm volatile ( "dmfc0 %0, $22\n" "ori %0, %0, 0x1110\n" "dmtc0 %0, $22\n" : "=r" (tmp)); } lsrval.u64 = cvmx_read_csr(CVMX_MIO_UARTX_LSR(cvmx_debug_uart)); } } static void cvmx_debug_uart_init(void) { if (cvmx_debug_uart == -1) cvmx_debug_uart = CVMX_DEBUG_COMM_UART_NUM; } static void cvmx_debug_uart_install_break_handler(void) { #ifndef CVMX_BUILD_FOR_LINUX_KERNEL #ifdef __OCTEON_NEWLIB__ if (cvmx_uart_enable_intr) #endif cvmx_uart_enable_intr(cvmx_debug_uart, cvmx_debug_uart_process_debug_interrupt); #endif } /* Get a packet from the UART, return 0 on failure and 1 on success. */ static int cvmx_debug_uart_getpacket(char *buffer, size_t size) { while (1) { unsigned char checksum; int timedout = 0; size_t count; char ch; ch = cvmx_uart_read_byte_with_timeout(cvmx_debug_uart, &timedout, __SHRT_MAX__); if (timedout) return 0; /* if this is not the start character, ignore it. */ if (ch != '$') continue; retry: checksum = 0; count = 0; /* now, read until a # or end of buffer is found */ while (count < size) { ch = cvmx_uart_read_byte(cvmx_debug_uart); if (ch == '$') goto retry; if (ch == '#') break; checksum = checksum + ch; buffer[count] = ch; count = count + 1; } buffer[count] = 0; if (ch == '#') { char csumchars[2]; unsigned xmitcsum; int n; csumchars[0] = cvmx_uart_read_byte(cvmx_debug_uart); csumchars[1] = cvmx_uart_read_byte(cvmx_debug_uart); n = sscanf(csumchars, "%2x", &xmitcsum); if (n != 1) return 1; return checksum == xmitcsum; } } return 0; } static int cvmx_debug_uart_putpacket(char *packet) { size_t i; unsigned char csum; unsigned char *ptr = (unsigned char *) packet; char csumstr[3]; for (csum = 0, i = 0; ptr[i]; i++) csum += ptr[i]; sprintf(csumstr, "%02x", csum); cvmx_spinlock_lock(&cvmx_debug_uart_lock); cvmx_uart_write_byte(cvmx_debug_uart, '$'); cvmx_uart_write_string(cvmx_debug_uart, packet); cvmx_uart_write_byte(cvmx_debug_uart, '#'); cvmx_uart_write_string(cvmx_debug_uart, csumstr); cvmx_spinlock_unlock(&cvmx_debug_uart_lock); return 0; } static void cvmx_debug_uart_change_core(int oldcore, int newcore) { #ifndef CVMX_BUILD_FOR_LINUX_KERNEL cvmx_ciu_intx0_t irq_control; irq_control.u64 = cvmx_read_csr(CVMX_CIU_INTX_EN0(newcore * 2)); irq_control.s.uart |= (1<