+++ /dev/null
-/*****************************************************************************
-*!
-*! 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 *******************************/
projects / openwrt / svn-archive / archive.git / blobdiff