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[/] [zipcpu/] [trunk/] [sw/] [zasm/] [sys.i] - Rev 32
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
; Filename: sys.i
;
; Project: Zip CPU -- a small, lightweight, RISC CPU soft core
;
; Purpose: This is the beginnings of a system wide header file for the
; Zip System. It describes and declares the peripherals
; that will the be used and referenced by the assembly files.
;
; Status: As of August, 2015, I have no confidence that the preprocessor
; can properly include this file. It certainly cannot handle
; macros (yet).
;
; Creator: Dan Gisselquist, Ph.D.
; Gisselquist Tecnology, LLC
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
; Copyright (C) 2015, Gisselquist Technology, LLC
;
; This program is free software (firmware): you can redistribute it and/or
; modify it under the terms of the GNU General Public License as published
; by the Free Software Foundation, either version 3 of the License, or (at
; your option) any later version.
;
; This program is distributed in the hope that it will be useful, but WITHOUT
; ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
; for more details.
;
; License: GPL, v3, as defined and found on www.gnu.org,
; http://www.gnu.org/licenses/gpl.html
;
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
sys.bus equ 0xc0000000
sys.breaken equ 0x080
sys.step equ 0x040
sys.gie equ 0x020
sys.sleep equ 0x010
sys.ccv equ 0x008
sys.ccn equ 0x004
sys.ccc equ 0x002
sys.ccz equ 0x001
sys.bu.pic equ 0x000
sys.bus.wdt equ 0x001
sys.bus.cache equ 0x002
sys.bus.ctrpic equ 0x003
sys.bus.tma equ 0x004
; Define the location(s) of our peripherals,
#define sys.base 0xc0000000
#define sys.cache.base 0xc0100000
#struct sys
pic
wdt
cache
ctrpic
tma
tmb
tmc
jiffies
mtask
mstl
mpstl
mastl
utask
ustl
upstl
uastl
#endstruct
; and their associated interrupt vectors ...
#define CACHEINT 0x01
#define JIFFYINT 0x02 ;
#define TMCINT 0x04 ;
#define TMBINT 0x08 ;
#define TMAINT 0x10 ;
#define CTRPICINT 0x20 ; The aux interrupt controller
; Masks to send to enable those same vectors
#define CACHEINTEN 0x80010000
#define JIFFYINTEN 0x80020000
#define TMCINTEN 0x80040000
#define TMBINTEN 0x80080000
#define TMAINTEN 0x80100000
#define CTRPICEN 0x80200000
; And similar masks to disable them
#define CACHEINTDIS 0x00010000
#define JIFFYINTDIS 0x00020000
#define TMCINTDIS 0x00040000
#define TMBINTDIS 0x00080000
#define TMAINTDIS 0x00100000
#define CTRPICDIS 0x00200000
; Define our condition code bits
#define CCZ 0x001
#define CCC 0x002
#define CCN 0x004
#define CCV 0x008
#define CCSLEEP 0x010
#define CCGIE 0x020
#define CCSTEP 0x040
#define CCUBRK 0x080
; Now, some macros
#define PUSH(RG,SP) SUB 1,SP \
STO RG,-1(SP)
#define POP(RG,SP) LOD -1(SP),RG \
ADD 1,SP
#define FJSR(LBL,RG) MOV __here__+2(PC),RG \
JMP LBL
#define FRET(RG) MOV RG,PC
#define JSR(LBL,RG) SUB 1,SP \
MOV __here__+3(PC),RG \
STO RG,-1(SP) \
JMP LBL \
ADD 1,SP
#define RET LOD -1(SP),PC
#define SAVE_USER_CONTEXT(DR,AR) \
MOV -16(uSP),AR \
MOV uPC,DR \
STO DR,-16(AR) \
MOV uCC,DR \
STO DR,-15(AR) \
MOV uSP,DR \
STO DR,-14(AR) \
MOV uR12,DR \
STO DR,-13(AR) \
MOV uR11,DR \
STO DR,-12(AR) \
MOV uR10,DR \
STO DR,-11(AR) \
MOV uR9,DR \
STO DR,-10(AR) \
MOV uR8,DR \
STO DR,-9(AR) \
MOV uR7,DR \
STO DR,-8(AR) \
MOV uR6,DR \
STO DR,-7(AR) \
MOV uR5,DR \
STO DR,-6(AR) \
MOV uR4,DR \
STO DR,-5(AR) \
MOV uR3,DR \
STO DR,-4(AR) \
MOV uR2,DR \
STO DR,-3(AR) \
MOV uR1,DR \
STO DR,-2(AR) \
MOV uR0,DR \
STO DR,-1(AR)
#define RESTORE_USER_CONTEXT(DR,AR) \
LOD -1(AR),DR \
MOV DR,uR0 \
LOD -2(AR),DR \
MOV DR,uR1 \
LOD -3(AR),DR \
MOV DR,uR2 \
LOD -4(AR),DR \
MOV DR,uR3 \
LOD -5(AR),DR \
MOV DR,uR4 \
LOD -6(AR),DR \
MOV DR,uR5 \
LOD -7(AR),DR \
MOV DR,uR6 \
LOD -8(AR),DR \
MOV DR,uR7 \
LOD -9(AR),DR \
MOV DR,uR8 \
LOD -10(AR),DR \
MOV DR,uR9 \
LOD -11(AR),DR \
MOV DR,uR10 \
LOD -12(AR),DR \
MOV DR,uR11 \
LOD -13(AR),DR \
MOV DR,uR12 \
LOD -14(AR),DR \
MOV DR,uSP \
LOD -15(AR),DR \
MOV DR,uCC \
LOD -16(AR),DR \
MOV DR,uPC
#define READ_USER_TRAP(RG) \
MOV uCC,RG \
AND -256,RG
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