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Length: 2034 (0x7f2)
Types: TextFile
Notes: UNIX file
Names: »mem.h«
└─⟦26887b7e0⟧ Bits:30009717 Comet 32 harddisk image
└─⟦28c352965⟧ »/a« UNIX Filesystem
└─⟦this⟧ »usr/include/sys/mem.h«
/*
* @(#)mem.h 3.3 7/14/83
* @(#)Copyright (C) 1983 by National Semiconductor Corp.
*/
/*
* Memory controller registers
*/
struct mcr {
short m16_mode0; /* (0x000) Set memory to mode 0 */
short m16_mode1; /* (0x002) Set memory to mode 1 */
short m16_mode2; /* (0x004) Set memory to mode 2 */
short m16_foo1;
short m16_mode3; /* (0x008) Set memory to mode 3 */
char m16_foo2[0x36];
short m16_esrlo; /* (0x040) low order half, error status reg. */
char m16_foo3[0x3e];
short m16_esrhi; /* (0x080) hi order half, error status reg. */
char m16_foo4[0x7e];
short m16_mcr; /* (0x100) mode control register */
};
/*
* Compute maximum possible number of memory controllers,
* for sizing of the mcraddr array.
*/
#define MAXNMCR 3
/* Offsets into memory controller register page */
#define M16_MODE0 0x000 /* Set memory to mode 0 */
#define M16_MODE1 0x002 /* Set memory to mode 1 */
#define M16_MODE2 0x004 /* Set memory to mode 2 */
#define M16_MODE3 0x008 /* Set memory to mode 3 */
#define M16_ESRLO 0x040 /* Low order half of Error Status Register */
#define M16_ESRHI 0x080 /* High order half of Error Status Register */
#define M16_MCR 0x100 /* Mode Control Register */
/* Contents of Error Status Register */
#define ECCADDR 0x00ffffff /* Address of ECC error */
#define ECCSYN 0x3f000000 /* Syndrome bits */
#define ECCERR 0x40000000 /* Error flag */
#define ECCOVFL 0x80000000 /* Overflow flag */
/* Macros to return parts of the Error Status Register */
#define M16_ADDR(esr) ((esr) & ECCADDR)
#define M16_SYN(esr) (((esr) & ECCSYN) >> 24)
#define M16_ERR(esr) ((esr) & ECCERR)
#define M16_OVFL(esr) ((esr) & ECCOVFL)
/* Macros to set memory modes */
#define M16_SETM0(mcr) ((mcr)->m16_mode0 = 0)
#define M16_SETM1(mcr) ((mcr)->m16_mode1 = 0)
#define M16_SETM2(mcr) ((mcr)->m16_mode2 = 0)
#define M16_SETM3(mcr) ((mcr)->m16_mode3 = 0)
/* Macro to read memory modes */
#define M16_READM(mcr) ((((mcr)->m16_mcr) >> 1) & 0x3)
#ifdef KERNEL
extern int nmcr;
extern struct mcr *mcraddr[MAXNMCR];
#endif