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/**************************************************************************
* arch/z16/src/z16f/z16f_head.S
* Z16F Reset Entry Point
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name NuttX 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
**************************************************************************/
/**************************************************************************
* Included Files
**************************************************************************/
#include <nuttx/config.h>
/**************************************************************************
* External References / External Definitions
**************************************************************************/
xref _z16f_lowinit:EROM
#if defined(CONFIG_ARCH_LOWPUTC) || defined(CONFIG_ARCH_LOWGETC)
xref _z16f_lowuartinit:EROM
#endif
xref _os_start:EROM
xdef _reset
xdef _sysexc_isr
xdef _timer2_isr
xdef _timer1_isr
xdef _timer0_isr
xdef _uart0rx_isr
xdef _uart0tx_isr
xdef _i2c_isr
xdef _spi_isr
xdef _adc_isr
xdef _p7ad_isr
xdef _p6ad_isr
xdef _p5ad_isr
xdef _p4ad_isr
xdef _p3ad_isr
xdef _p2ad_isr
xdef _p1ad_isr
xdef _p0ad_isr
xdef _pwmtimer_isr
xdef _uart1rx_isr
xdef _uart1tx_isr
xdef _pwmfault_isr
xdef _c3_isr
xdef _c2_isr
xdef _c1_isr
xdef _c0_isr
xdef _common_isr
xref _low_nearbss:RAM
xref _len_nearbss
xref _low_farbss:ERAM
xref _len_farbss:ERAM
xref _low_neardata:RAM
xref _len_neardata
xref _low_near_romdata:EROM
xref _low_fardata:ERAM
xref _len_fardata:ERAM
xref _low_far_romdata:EROM
xref far_heapbot:ERAM
xref _far_stack:ERAM
xref _near_stack:RAM
/**************************************************************************
* Flash Option Byte Setup
**************************************************************************/
define FOPTIONSEG, SPACE=ROM, ORG=0
segment FOPTIONSEG
db %FF
db %FF
db %FF
db %FF
/**************************************************************************
* vectors
**************************************************************************/
vector RESET=_reset
vector SYSEXC=_sysexc_isr
vector TIMER2=_timer2_isr
vector TIMER1=_timer1_isr
vector TIMER0=_timer0_isr
vector UART0_RX=_uart0rx_isr
vector UART0_TX=_uart0tx_isr
vector I2C=_i2c_isr
vector SPI=_spi_isr
vector ADC=_adc_isr
vector P7AD=_p7ad_isr
vector P6AD=_p6ad_isr
vector P5AD=_p5ad_isr
vector P4AD=_p4ad_isr
vector P3AD=_p3ad_isr
vector P2AD=_p2ad_isr
vector P1AD=_p1ad_isr
vector P0AD=_p0ad_isr
vector PWM_TIMER=_pwmtimer_isr
vector UART1_RX=_uart1rx_isr
vector UART1_TX=_uart1tx_isr
vector PWM_FAULT=_pwmfault_isr
vector C3=_c3_isr
vector C2=_c3_isr
vector C1=_c2_isr
vector C0=_c0_isr
/**************************************************************************
* Equates
**************************************************************************/
/**************************************************************************
* Data Allocation
**************************************************************************/
/**************************************************************************
* Code
**************************************************************************/
define CODESEG, SPACE=EROM
segment CODESEG
/**************************************************************************
* Name: _reset
*
* Description:
* Reset entry point
*
**************************************************************************/
_reset:
/* Initialize the init/idle task stack */
ld sp, #(_near_stack+1) /* Set Stack Pointer to the top of internal RAM */
clr fp
/* Perform VERY early UART initialization so that we can use it here */
#if defined(CONFIG_ARCH_LOWPUTC) || defined(CONFIG_ARCH_LOWGETC)
call _z16f_lowuartinit /* Initialize the UART for debugging */
#endif
/* Initialize the hardware stack overflow register */
#ifdef CONFIG_Z16F_INITSPOV
ld r0, #(_near_stack_bot+1)
ld spov, r0
#endif
/* Clear BSS */
lea r0, _low_nearbss
ld r1, #_len_nearbss+1
jp _reset2
_reset1:
ld.b (r0++), #0
_reset2:
djnz r1, _reset1
lea r0, _low_farbss
ld r1, #_len_farbss+1
jp _reset4
_reset3:
ld.b (r0++), #0
_reset4:
djnz r1, _reset3
/* Copy ROM data into RAM */
lea r0, _low_near_romdata
lea r1, _low_neardata
ld r2, #_len_neardata+1
jp _reset6
_reset5:
ld.b r3, (r0++)
ld.b (r1++), r3
_reset6:
djnz r2, _reset5
lea r0, _low_far_romdata
lea r1, _low_fardata
ld r2, #_len_fardata+1
jp _reset8
_reset7:
ld.b r3, (r0++)
ld.b (r1++), r3
_reset8:
djnz r2, _reset7
/* Perform low-level hardware initialization */
call _z16f_lowinit /* Perform low-level hardware initialization */
/* Start NuttX */
call _os_start /* Start the operating system */
_halted: /* _os_start() should not return */
halt
jp _halted
/**************************************************************************
* Name: Interrupt handlers
*
* Description:
* All interrupts will be vectored to the following locations.
*
**************************************************************************/
_sysexc_isr:
_timer2_isr:
_timer1_isr:
_timer0_isr:
_uart0rx_isr:
_uart0tx_isr:
_i2c_isr:
_spi_isr:
_adc_isr:
_p7ad_isr:
_p6ad_isr:
_p5ad_isr:
_p4ad_isr:
_p3ad_isr:
_p2ad_isr:
_p1ad_isr:
_p0ad_isr:
_pwmtimer_isr:
_uart1rx_isr:
_uart1tx_isr:
_pwmfault_isr:
_c3_isr:
_c2_isr:
_c1_isr:
_c0_isr:
_common_isr:
nop
iret
end
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