mbx.h

RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating sys

/*
 * A collection of structures, addresses, and values associated with
 * the Motorola MBX boards.  This was originally created for the
 * MBX860, and probably needs revisions for other boards (like the 821).
 * When this file gets out of control, we can split it up into more
 * meaningful pieces.
 *
 * Copyright (c) 1997 Dan Malek ([e-mail])
 */
#ifndef __MACH_MBX_DEFS
#define __MACH_MBX_DEFS

/* A Board Information structure that is given to a program when
 * EPPC-Bug starts it up.
 */
typedef struct bd_info {
	unsigned int	bi_tag;		/* Should be 0x42444944 "BDID" */
	unsigned int	bi_size;	/* Size of this structure */
	unsigned int	bi_revision;	/* revision of this structure */
	unsigned int	bi_bdate;	/* EPPCbug date, i.e. 0x11061997 */
	unsigned int	bi_memstart;	/* Memory start address */
	unsigned int	bi_memsize;	/* Memory (end) size in bytes */
	unsigned int	bi_intfreq;	/* Internal Freq, in Hz */
	unsigned int	bi_busfreq;	/* Bus Freq, in Hz */
	unsigned int	bi_clun;	/* Boot device controller */
	unsigned int	bi_dlun;	/* Boot device logical dev */
} bd_t;

/* Memory map for the MBX as configured by EPPC-Bug.  We could reprogram
 * The SIU and PCI bridge, and try to use larger MMU pages, but the
 * performance gain is not measureable and it certainly complicates the
 * generic MMU model.
 *
 * In a effort to minimize memory usage for embedded applications, any
 * PCI driver or ISA driver must request or map the region required by
 * the device.  For convenience (and since we can map up to 4 Mbytes with
 * a single page table page), the MMU initialization will map the
 * NVRAM, Status/Control registers, CPM Dual Port RAM, and the PCI
 * Bridge CSRs 1:1 into the kernel address space.
 */
#define PCI_ISA_IO_ADDR		((unsigned int)0x80000000)
#define PCI_ISA_IO_SIZE		((unsigned int)(512 * 1024 * 1024))
#define PCI_ISA_MEM_ADDR	((unsigned int)0xc0000000)
#define PCI_ISA_MEM_SIZE	((unsigned int)(512 * 1024 * 1024))
#define PCMCIA_MEM_ADDR		((unsigned int)0xe0000000)
#define PCMCIA_MEM_SIZE		((unsigned int)(64 * 1024 * 1024))
#define PCMCIA_DMA_ADDR		((unsigned int)0xe4000000)
#define PCMCIA_DMA_SIZE		((unsigned int)(64 * 1024 * 1024))
#define PCMCIA_ATTRB_ADDR	((unsigned int)0xe8000000)
#define PCMCIA_ATTRB_SIZE	((unsigned int)(64 * 1024 * 1024))
#define PCMCIA_IO_ADDR		((unsigned int)0xec000000)
#define PCMCIA_IO_SIZE		((unsigned int)(64 * 1024 * 1024))
#define NVRAM_ADDR		((unsigned int)0xfa000000)
#define NVRAM_SIZE		((unsigned int)(1 * 1024 * 1024))
#define MBX_CSR_ADDR		((unsigned int)0xfa100000)
#define MBX_CSR_SIZE		((unsigned int)(1 * 1024 * 1024))
#define IMAP_ADDR		((unsigned int)0xfa200000)
#define IMAP_SIZE		((unsigned int)(64 * 1024))
#define PCI_CSR_ADDR		((unsigned int)0xfa210000)
#define PCI_CSR_SIZE		((unsigned int)(64 * 1024))

#define MBX_CSR2 	        (MBX_CSR_ADDR+1)
#endif