/****************************************************************************
* arch/z80/src/z8/z8_registerdump.c
*
* Copyright (C) 2008-2009,2011 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>
#include <stdint.h>
#include <debug.h>
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include "chip/switch.h"
#include "os_internal.h"
#include "up_internal.h"
/****************************************************************************
* Definitions
****************************************************************************/
/* Output debug info if stack dump is selected -- even if
* debug is not selected.
*/
#ifdef CONFIG_ARCH_STACKDUMP
# undef lldbg
# define lldbg lib_lowprintf
#endif
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
#ifdef CONFIG_ARCH_STACKDUMP
static inline void z8_dumpregs(FAR chipret_t *regs)
{
lldbg("REGS: %04x %04x %04x %04x %04x %04x %04x %04x\n",
regs[XCPT_RR0], regs[XCPT_RR2], regs[XCPT_RR4], regs[XCPT_RR6],
regs[XCPT_RR8], regs[XCPT_RR10], regs[XCPT_RR12], regs[XCPT_RR14]);
}
static inline void z8_dumpstate(chipreg_t sp, chipreg_t pc, uint8_t irqctl,
chipreg_t rpflags)
{
lldbg("SP: %04x PC: %04x IRQCTL: %02x RP: %02x FLAGS: %02x\n",
sp, pc, irqctl & 0xff, rpflags >> 8, rpflags & 0xff);
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: z8_registerdump
****************************************************************************/
#ifdef CONFIG_ARCH_STACKDUMP
void z8_registerdump(void)
{
FAR chipret_t *regs;
FAR chipret_t *state;
chipreg_t sp;
uint16_t rp;
switch (g_z8irqstate.state)
{
case Z8_IRQSTATE_ENTRY:
/* Calculate the source address based on the saved RP value */
rp = g_z8irqstate.regs[Z8_IRQSAVE_RPFLAGS] >> 8;
regs = (FAR uint16_t*)(rp & 0xf0);
/* Then dump the register values */
z8_dumpregs(regs);
/* Dump the saved machine state:
* The g_z8irqstate.regs pointer is the value of the stack pointer at
* the time that up_doirq() was called. Therefore, we can calculate
* the correct value for the stack pointer on return from interrupt:
*/
sp = ((chipreg_t)g_z8irqstate.regs) + Z8_IRQSAVE_SIZE;
z8_dumpstate(sp, g_z8irqstate.regs[Z8_IRQSAVE_PC], 0x80,
g_z8irqstate.regs[Z8_IRQSAVE_RPFLAGS]);
break;
case Z8_IRQSTATE_SAVED:
regs = g_z8irqstate.regs;
z8_dumpregs(regs);
z8_dumpstate(regs[XCPT_SP], regs[XCPT_PC],
regs[XCPT_IRQCTL], regs[XCPT_RPFLAGS]);
break;
case Z8_IRQSTATE_NONE:
default:
break;
}
}
#endif
