/*
* SH7750 interrupt support.
*
* Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia
* Author: Victor V. Vengerov <vvv@oktet.ru>
*
* Based on work:
* Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and
* Bernd Becker (becker@faw.uni-ulm.de)
*
* COPYRIGHT (c) 1997-1998, FAW Ulm, Germany
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
*
*
* COPYRIGHT (c) 1998.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* Modified to reflect isp entries for sh7045 processor:
* John M. Mills (jmills@tga.com)
* TGA Technologies, Inc.
* 100 Pinnacle Way, Suite 140
* Norcross, GA 30071 U.S.A.
* August, 1999
*
* This modified file may be copied and distributed in accordance
* the above-referenced license. It is provided for critique and
* developmental purposes without any warranty nor representation
* by the authors or by TGA Technologies.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/score/types.h>
#include <rtems/score/isr.h>
/*
* This is a exception vector table
*
* It has the same structure as the actual vector table (vectab)
*/
#include <rtems/score/ispsh7750.h>
#include <rtems/score/sh4_regs.h>
#include <rtems/score/sh7750_regs.h>
/* VBR register contents saved on startup -- used to hook exception by debug
* agent */
void *_VBR_Saved;
/*PAGE
*
* _CPU_ISR_install_vector
*
* This kernel routine installs the RTEMS handler for the
* specified vector.
*
* Input parameters:
* vector - interrupt vector number
* old_handler - former ISR for this vector number
* new_handler - replacement ISR for this vector number
*
* Output parameters: NONE
*
*/
void _CPU_ISR_install_vector(
unsigned32 vector,
proc_ptr new_handler,
proc_ptr *old_handler
)
{
*old_handler = _ISR_Vector_table[vector];
_ISR_Vector_table[vector] = new_handler;
}
#define __STRINGIFY1__(x) #x
#define __STRINGIFY__(x) __STRINGIFY1__(x)
#define STOP_TIMER \
" mov.l TSTR_k,r0 \n" \
" mov.b @r0,r1 \n" \
" and #" __STRINGIFY__(~SH7750_TSTR_STR0) ",r1\n" \
" mov.b r1,@r0 \n"
#define START_TIMER \
" mov.l TSTR_k,r0 \n" \
" mov.b @r0,r1 \n" \
" or #" __STRINGIFY__(SH7750_TSTR_STR0) ",r1\n" \
" mov.b r1,@r0 \n"
asm (" .text\n"
" .balign 256\n"
" .global __vbr_base\n"
"__vbr_base:\n"
" .org __vbr_base + 0x100\n"
"vbr_100:\n"
" mov.l r0,@-r15\n"
" mov.l r1,@-r15\n"
" mov.l __VBR_Saved100_k, r0\n"
" mov.l offset100_k,r1\n"
" mov.l @r0,r0\n"
" add r1,r0\n"
" mov.l @r15+,r1\n"
" jmp @r0\n"
" mov.l @r15+,r0\n"
" .align 2\n"
"__VBR_Saved100_k:\n"
" .long __VBR_Saved\n"
"offset100_k:\n"
" .long 0x100\n"
" .org __vbr_base + 0x400\n"
"vbr_400:\n"
" mov.l r0,@-r15\n"
" mov.l r1,@-r15\n"
" mov.l __VBR_Saved400_k, r0\n"
" mov.l offset400_k,r1\n"
" mov.l @r0,r0\n"
" add r1,r0\n"
" mov.l @r15+,r1\n"
" jmp @r0\n"
" mov.l @r15+,r0\n"
" .align 2\n"
"__VBR_Saved400_k:\n"
" .long __VBR_Saved\n"
"offset400_k:\n"
" .long 0x400\n"
" .org __vbr_base + 0x600\n"
"vbr_600:\n"
" mov.l r0,@-r15 \n"
" mov.l r1,@-r15 \n"
" stc sr,r0 \n"
" mov.l __vbr_600_sr_and_k,r1\n"
" and r1,r0 \n"
" mov.l __vbr_600_sr_or_k,r1\n"
" or r1,r0 \n"
" ldc r0,sr \n"
" ldc.l @r15+,r1_bank\n"
" ldc.l @r15+,r0_bank\n"
" mov.l r0,@-r15 \n"
" mov.l r1,@-r15 \n"
" mov.l r2,@-r15 \n"
" mov.l r3,@-r15 \n"
" mov.l r4,@-r15 \n"
" mov.l r5,@-r15 \n"
" mov.l r6,@-r15 \n"
" mov.l r7,@-r15 \n"
#if 0
" mov.l r8,@-r15 \n"
" mov.l r9,@-r15 \n"
" mov.l r10,@-r15 \n"
" mov.l r11,@-r15 \n"
" mov.l r12,@-r15 \n"
" mov.l r13,@-r15 \n"
#endif
" mov.l r14,@-r15 \n"
" sts.l fpscr,@-r15\n"
" sts.l fpul,@-r15 \n"
" mov.l __ISR_temp_fpscr_k,r0 \n"
" lds r0,fpscr \n"
" fmov fr0,@-r15 \n"
" fmov fr1,@-r15 \n"
" fmov fr2,@-r15 \n"
" fmov fr3,@-r15 \n"
" fmov fr4,@-r15 \n"
" fmov fr5,@-r15 \n"
" fmov fr6,@-r15 \n"
" fmov fr7,@-r15 \n"
" fmov fr8,@-r15 \n"
" fmov fr9,@-r15 \n"
" fmov fr10,@-r15 \n"
" fmov fr11,@-r15 \n"
" fmov fr12,@-r15 \n"
" fmov fr13,@-r15 \n"
" fmov fr14,@-r15 \n"
" fmov fr15,@-r15 \n"
" sts.l pr,@-r15 \n"
" sts.l mach,@-r15 \n"
" sts.l macl,@-r15 \n"
" stc.l spc,@-r15 \n"
" stc.l ssr,@-r15 \n"
" mov r15,r14 \n"
#if 0
" stc ssr,r0 \n"
" ldc r0,sr \n"
#endif
" mov.l __ISR_Handler_k, r1\n"
" mov.l _INTEVT_k,r4\n"
" mov.l @r4,r4 \n"
" shlr2 r4 \n"
" shlr r4 \n"
" mov.l _ISR_Table_k,r0\n"
" mov.l @r0,r0 \n"
" add r4,r0 \n"
" mov.l @r0,r0 \n"
" cmp/eq #0,r0 \n"
" bt _ipl_hook \n"
" jsr @r1 \n"
" shlr2 r4 \n"
" mov r14,r15 \n"
" ldc.l @r15+,ssr \n"
" ldc.l @r15+,spc \n"
" lds.l @r15+,macl \n"
" lds.l @r15+,mach \n"
" lds.l @r15+,pr \n"
" mov.l __ISR_temp_fpscr_k,r0 \n"
" lds r0,fpscr \n"
" fmov @r15+,fr15 \n"
" fmov @r15+,fr14 \n"
" fmov @r15+,fr13 \n"
" fmov @r15+,fr12 \n"
" fmov @r15+,fr11 \n"
" fmov @r15+,fr10 \n"
" fmov @r15+,fr9 \n"
" fmov @r15+,fr8 \n"
" fmov @r15+,fr7 \n"
" fmov @r15+,fr6 \n"
" fmov @r15+,fr5 \n"
" fmov @r15+,fr4 \n"
" fmov @r15+,fr3 \n"
" fmov @r15+,fr2 \n"
" fmov @r15+,fr1 \n"
" fmov @r15+,fr0 \n"
" lds.l @r15+,fpul \n"
" lds.l @r15+,fpscr\n"
" mov.l @r15+,r14 \n"
#if 0
" mov.l @r15+,r13 \n"
" mov.l @r15+,r12 \n"
" mov.l @r15+,r11 \n"
" mov.l @r15+,r10 \n"
" mov.l @r15+,r9 \n"
" mov.l @r15+,r8 \n"
#endif
" mov.l @r15+,r7 \n"
" mov.l @r15+,r6 \n"
" mov.l @r15+,r5 \n"
" mov.l @r15+,r4 \n"
" mov.l @r15+,r3 \n"
" mov.l @r15+,r2 \n"
" mov.l @r15+,r1 \n"
" mov.l @r15+,r0 \n"
" rte \n"
" nop \n"
" .align 2 \n"
"__vbr_600_sr_and_k: \n"
" .long " __STRINGIFY__(~(SH4_SR_RB | SH4_SR_BL)) "\n"
"__vbr_600_sr_or_k: \n"
" .long " __STRINGIFY__(SH4_SR_IMASK) "\n"
"__ISR_Handler_k: \n"
" .long ___ISR_Handler\n"
"_INTEVT_k: \n"
" .long " __STRINGIFY__(SH7750_INTEVT) "\n"
"_ISR_Table_k: \n"
" .long __ISR_Vector_table\n"
"_ipl_hook: \n"
" mov r14,r15 \n"
" ldc.l @r15+,ssr \n"
" ldc.l @r15+,spc \n"
" lds.l @r15+,macl \n"
" lds.l @r15+,mach \n"
" lds.l @r15+,pr \n"
" mov.l __ISR_temp_fpscr_k,r0 \n"
" lds r0,fpscr \n"
" fmov @r15+,fr15 \n"
" fmov @r15+,fr14 \n"
" fmov @r15+,fr13 \n"
" fmov @r15+,fr12 \n"
" fmov @r15+,fr11 \n"
" fmov @r15+,fr10 \n"
" fmov @r15+,fr9 \n"
" fmov @r15+,fr8 \n"
" fmov @r15+,fr7 \n"
" fmov @r15+,fr6 \n"
" fmov @r15+,fr5 \n"
" fmov @r15+,fr4 \n"
" fmov @r15+,fr3 \n"
" fmov @r15+,fr2 \n"
" fmov @r15+,fr1 \n"
" fmov @r15+,fr0 \n"
" lds.l @r15+,fpul \n"
" lds.l @r15+,fpscr\n"
" mov.l @r15+,r14 \n"
" mov.l @r15+,r13 \n"
" mov.l @r15+,r12 \n"
" mov.l @r15+,r11 \n"
" mov.l @r15+,r10 \n"
" mov.l @r15+,r9 \n"
" mov.l @r15+,r8 \n"
" mov.l @r15+,r7 \n"
" mov.l @r15+,r6 \n"
" mov.l @r15+,r5 \n"
" mov.l @r15+,r4 \n"
" mov.l @r15+,r3 \n"
" mov.l @r15+,r2 \n"
" mov.l __VBR_Saved600_k, r0\n"
" mov.l offset600_k,r1\n"
" mov.l @r0,r0\n"
" add r1,r0\n"
" mov.l @r15+,r1\n"
" jmp @r0\n"
" mov.l @r15+,r0\n"
" .align 2\n"
"__ISR_temp_fpscr_k: \n"
" .long " __STRINGIFY__(SH4_FPSCR_PR) " \n"
"__VBR_Saved600_k:\n"
" .long __VBR_Saved\n"
"offset600_k:\n"
" .long 0x600\n"
);
/************************************************
* Dummy interrupt service procedure for
* interrupts being not allowed --> Trap 2
************************************************/
asm(" .section .text
.global __dummy_isp
__dummy_isp:
mov.l r14,@-r15
mov r15, r14
trapa #2
mov.l @r15+,r14
rte
nop");
