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////////////////////////////////////////////////////////////////////////////////

//

// Filename:    zipsys.h

//

// Project:     OpenArty, an entirely open SoC based upon the Arty platform

//

// Purpose:     Declare the capabilities and memory structure of the ZipSystem

//              for programs that must interact with it.

//

// Creator:     Dan Gisselquist, Ph.D.

//              Gisselquist Technology, LLC

//

////////////////////////////////////////////////////////////////////////////////

//

// Copyright (C) 2015-2016, 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.

//

// You should have received a copy of the GNU General Public License along

// with this program.  (It's in the $(ROOT)/doc directory, run make with no

// target there if the PDF file isn't present.)  If not, see

// <http://www.gnu.org/licenses/> for a copy.

//

// License:     GPL, v3, as defined and found on www.gnu.org,

//              http://www.gnu.org/licenses/gpl.html

//

//

////////////////////////////////////////////////////////////////////////////////

//

//

#ifndef ZIPSYS_H

#define ZIPSYS_H

typedef struct  {

        unsigned        ac_ck, ac_mem, ac_pf, ac_icnt;

} ZIPTASKCTRS;

typedef struct  {

        int     d_ctrl, d_len;

        int     *d_rd, *d_wr;

} ZIPDMA;

#define DMA_TRIGGER     0x00008000

#define DMACABORT       0xffed0000

#define DMACLEAR        0xafed0000

#define DMACCOPY        0x0fed0000

#define DMACERR         0x40000000

#define DMA_CONSTSRC    0x20000000

#define DMA_CONSTDST    0x10000000

#define DMAONEATATIME   0x0fed0001

#define DMA_BUSY        0x80000000

#define DMA_ERR         0x40000000

#define DMA_ONINT(INT)  (DMA_TRIGGER|(((INT)&15)<<10))

#define DMA_ONJIFFIES   DMA_ONINT(1)

#define DMA_ONTMC       DMA_ONINT(2)

#define DMA_ONTMB       DMA_ONINT(3)

#define DMA_ONTMA       DMA_ONINT(4)

#define DMA_ONAUX       DMA_ONINT(5)

#define TMR_INTERVAL    0x80000000

typedef struct  {

        int     z_pic, z_wdt, z_wbus, z_apic, z_tma, z_tmb, z_tmc,

                z_jiffies;

#ifdef  _HAVE_ZIPSYS_PERFORMANCE_COUNTERS

        ZIPTASKCTRS     z_m, z_u;

#else

        unsigned        z_nocounters[8];

#endif

#ifdef  _HAVE_ZIPSYS_DMA

        ZIPDMA          z_dma;

#else

        unsigned        z_nodma[4];

#endif

} ZIPSYS;

#define ZIPSYS_ADDR     0xff000000

#define SYSINT_DMAC     0x0001

#define SYSINT_JIFFIES  0x0002

#define SYSINT_TMC      0x0004

#define SYSINT_TMB      0x0008

#define SYSINT_TMA      0x0010

#define SYSINT_AUX      0x0020

//

#define SYSINT(INTID)   (1<<(INTID))

#define ALTINT(INTID)   (1<<(INTID))

#ifdef  _HAVE_ZIPSYS_PERFORMANCE_COUNTERS

#define ALTINT_UIC      ALTINT(0)

#define ALTINT_UTC      ALTINT(3)

#define ALTINT_MIC      ALTINT(4)

#define ALTINT_MTC      ALTINT(7)

#endif

#define INT_ENABLE      0x80000000

#define EINT(A) (INT_ENABLE|((A)<<16))

#define DINT(A) ((A)<<16)

#define CLEARPIC        0x7fff7fff

#define DALLPIC         0x7fff0000      // Disable all PIC interrupt sources

#define INTNOW          0x08000

static  volatile ZIPSYS *const zip = (ZIPSYS *)(ZIPSYS_ADDR);

static inline void      DISABLE_INTS(void) {

        zip->z_pic = 0;

}

static inline void      ENABLE_INTS(void) {

        zip->z_pic = 0x80000000;

}

typedef struct  {

        int     c_r[16];

#ifdef  _HAVE_ZIPSYS_PERFORMANCE_COUNTERS

        unsigned long   c_ck, c_mem, c_pf, c_icnt;

#endif

} ZSYSCONTEXT;

#ifdef  _HAVE_ZIPSYS_PERFORMANCE_COUNTERS

void    save_contextncntrs(ZSYSCONTEXT *c);

void    restore_contextncntrs(ZSYSCONTEXT *c);

#else

#define save_contextncntrs(CONTEXT)     save_context((int *)CONTEXT)

#define restore_contextncntrs(CONTEXT)  restore_context((int *)CONTEXT)

#endif

#endif