diff options
Diffstat (limited to 'package/etrax-tools/src/e100boot/cbl/src/common_init.c')
| -rw-r--r-- | package/etrax-tools/src/e100boot/cbl/src/common_init.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/package/etrax-tools/src/e100boot/cbl/src/common_init.c b/package/etrax-tools/src/e100boot/cbl/src/common_init.c new file mode 100644 index 000000000..8104a4df3 --- /dev/null +++ b/package/etrax-tools/src/e100boot/cbl/src/common_init.c @@ -0,0 +1,209 @@ +/***************************************************************************** +*! +*! FILE NAME : common_init.c +*! +*! DESCRIPTION: This piece of code is loaded at bootstrap and is put in the +*! cache at 0x380000F0. Depending of how R_BUS_STATUS<2:1> is +*! set different kinds of bootstrap is performed. +*! +*! 00 - Normal boot. No bootstrap is performed and this code +*! is never loaded. +*! 01 - Serial boot. 784 bytes is loaded and execution starts +*! at 0x380000F0. +*! 11 - Parallel boot. 784 bytes is loaded and execution starts +*! at 0x380000F0. +*! 10 - Network boot. 1484 bytes is loaded and execution start +*! at 0x380000F4. +*! +*! --------------------------------------------------------------------------- +*! HISTORY +*! +*! DATE NAME CHANGES +*! ---- ---- ------- +*! 980326 Ronny Ranerup Initial version +*! Sep 20 1999 Jonas Dellenvall Added port3 debug support +*! 20020206 ronny Yeah, and I removed it again... +*! +*! --------------------------------------------------------------------------- +*! (C) Copyright 1998-2002, Axis Communications AB, LUND, SWEDEN +*!***************************************************************************/ + +/* + + Misc notes: + + It is very important to keep this file short. This and the boot + interface specific parts must fit into the first boot packet. + +*/ + +/****************** INCLUDE FILES SECTION ***********************************/ + +#include "hwregs.h" +#include "e100boot.h" + +/****************** CONSTANT AND MACRO SECTION ******************************/ + +/****************** TYPE DEFINITION SECTION *********************************/ + +/****************** LOCAL FUNCTION DECLARATION SECTION **********************/ + +static int timeout(void); + +/****************** GLOBAL VARIABLE DECLARATION SECTION *********************/ + +udword nbr_read; /* How many bytes has been read from current file */ +byte interface; /* Which I/O interface is the current one */ +byte set_dest; /* Have we set the destination address in tx_header */ +udword last_timeout; + +struct packet_header_T tx_header; +dma_descr_T tx_descr; /* For packet header */ +dma_descr_T tx_descr2; /* packet data */ + +struct packet_header_T rx_header; +dma_descr_T rx_descr; /* For packet header */ +dma_descr_T rx_descr2; /* packet data */ + +udword seq; /* Sequence number of next wanted packet */ +byte serial_up; + +/****************** LOCAL VARIABLE DECLARATION SECTION **********************/ + +/****************** FUNCTION DEFINITION SECTION *****************************/ + +void +crt1(void) +{ + /* Do this only once so we don't reset the timers and destroy the 32 + bit timer-register used as random number generator */ + + REG_SET__R_TIMER_CTRL( + timerdiv1, 0, + timerdiv0, 0, + presc_timer1, normal, + i1, clr, + tm1, run, + clksel1, cascade0, + presc_ext, prescale, + i0, clr, + tm0, run, + clksel0, c9600Hz); + + REG_SET__R_TIMER_CTRL( + timerdiv1, 0, + timerdiv0, 0, + presc_timer1, normal, + i1, nop, + tm1, run, + clksel1, cascade0, + presc_ext, prescale, + i0, nop, + tm0, run, + clksel0, c9600Hz); + + start(); +} + +void +start(void) +{ +#if USE_LEDS + REG_SET__R_PORT_PA_DIR( + dir7, output, + dir6, output, + dir5, output, + dir4, output, + dir3, output, + dir2, output, + dir1, output, + dir0, input); /* not for prodtest */ + + REG_SET__R_PORT_PA_DATA(data_out, 0); + + REG_SET__R_PORT_PB_DIR( + dir7, output, + dir6, output, + dir5, output, + dir4, output, + dir3, output, + dir2, output, + dir1, output, + dir0, output); + + REG_SET__R_PORT_PB_DATA(data_out, 0xff); +#endif + + /* We must initialize all (global) variables here, since the .data + and .bss area are used before they are loaded. */ + + //serial_up = FALSE; + nbr_read = 0; + + /* Get a random value to use as id. */ + tx_header.id = htonl(REG_RD(R_TIMER_DATA)); + + /* timer01 is used as timer. */ + last_timeout = REG_GET(R_TIMER01_DATA, count); + + interface = REG_GET(R_BUS_STATUS, boot) - 1; /* 0,1,2 */ + rx_descr2.status = 0; + + /* Initialize the boot interface */ + init_interface(); + send_ack(); /* Ack the first bootpacket, i.e. this code. seq 0. */ + + while (1) { + if (read_data()) { + if (nbr_read >= (udword)bytes_to_read) { + break; + } + else if (interface == NETWORK) { + REG_SET(R_DMA_CH1_CMD, cmd, start); + } + } + } + +#if USE_LEDS + REG_SET(R_PORT_PA_DATA, data_out, 0x55); +#endif + + level2_boot(); +} + +int +read_data(void) +{ + if (handle_read()) { + return TRUE; + } + + if (timeout()) { + send_ack(); + } + + return FALSE; +} + +int +timeout(void) +{ + volatile int now = REG_GET(R_TIMER01_DATA, count); + int elapsed; + int wait_time = 9600; + + elapsed = last_timeout - now; + + if (elapsed < 0) { + elapsed = -elapsed; + } + + if (elapsed > wait_time) { + last_timeout = now; + return TRUE; + } + + return FALSE; +} + +/****************** END OF FILE common_init.c *******************************/ |