202 lines
5.8 KiB
C
202 lines
5.8 KiB
C
/*
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* Machine dependent constants for MIPS32.
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*
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* Copyright (c) 1986 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*/
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#ifndef ENDIAN
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/*
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* Definitions for byte order,
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* according to byte significance from low address to high.
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*/
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#define LITTLE 1234 /* least-significant byte first (vax) */
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#define BIG 4321 /* most-significant byte first */
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#define PDP 3412 /* LSB first in word, MSW first in long (pdp) */
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#define ENDIAN LITTLE /* byte order on pic32 */
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/*
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* The time for a process to be blocked before being very swappable.
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* This is a number of seconds which the system takes as being a non-trivial
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* amount of real time. You probably shouldn't change this;
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* it is used in subtle ways (fractions and multiples of it are, that is, like
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* half of a ``long time'', almost a long time, etc.)
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* It is related to human patience and other factors which don't really
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* change over time.
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*/
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#define MAXSLP 20
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/*
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* Clock ticks per second. The HZ value must be an integer factor of 1000.
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*/
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#ifndef HZ
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#define HZ 200
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#endif
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/*
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* System parameter formulae.
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*/
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#ifndef NBUF
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#define NBUF 10 /* number of i/o buffers */
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#endif
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#ifndef MAXUSERS
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#define MAXUSERS 1 /* number of user logins */
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#endif
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#ifndef NPROC
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#define NPROC 10 /* number of processes */
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#endif
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#ifndef NINODE
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#define NINODE 24
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#endif
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#ifndef NFILE
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#define NFILE 24
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#endif
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#define NNAMECACHE (NINODE * 11/10)
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#define NCALL (16 + 2 * MAXUSERS)
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#define NCLIST 32 /* number or CBSIZE blocks */
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#ifndef SMAPSIZ
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#define SMAPSIZ NPROC /* size of swap allocation map */
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#endif
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/*
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* Disk blocks.
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*/
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#define DEV_BSIZE 1024 /* the same as MAXBSIZE */
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#define DEV_BSHIFT 10 /* log2(DEV_BSIZE) */
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#define DEV_BMASK (DEV_BSIZE-1)
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/* Bytes to disk blocks */
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#define btod(x) (((x) + DEV_BSIZE-1) >> DEV_BSHIFT)
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/*
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* On PIC32, there are total 512 kbytes of flash and 128 kbytes of RAM.
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* We reserve for kernel 192 kbytes of flash and 32 kbytes of RAM.
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*/
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#define FLASH_SIZE (512*1024)
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#define DATA_SIZE (128*1024)
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#define KERNEL_FLASH_SIZE (192*1024)
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#ifdef KERNEL_EXECUTABLE_RAM
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extern void _keram_start(), _keram_end();
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#define KERAM_SIZE ((unsigned)((char*)&_keram_end-(char*)&_keram_start))
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#define KERNEL_DATA_SIZE (32*1024-KERAM_SIZE)
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#else
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#define KERNEL_DATA_SIZE (32*1024)
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#endif
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#define KERNEL_FLASH_START 0x9d000000
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#define USER_FLASH_START (KERNEL_FLASH_START + KERNEL_FLASH_SIZE)
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#define USER_FLASH_END (KERNEL_FLASH_START + FLASH_SIZE)
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#define KERNEL_DATA_START 0x80000000
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#define KERNEL_DATA_END (KERNEL_DATA_START + KERNEL_DATA_SIZE)
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#ifdef KERNEL_EXECUTABLE_RAM
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#define USER_DATA_START (0x7f000000 + KERNEL_DATA_SIZE+KERAM_SIZE)
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#else
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#define USER_DATA_START (0x7f000000 + KERNEL_DATA_SIZE)
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#endif
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#define USER_DATA_END (0x7f000000 + DATA_SIZE)
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#define stacktop(siz) (USER_DATA_END)
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#define stackbas(siz) (USER_DATA_END-(siz))
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/*
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* User area: a user structure, followed by the kernel
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* stack. The number for USIZE is determined empirically.
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*
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* Note that the SBASE and STOP constants are only used by the assembly code,
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* but are defined here to localize information about the user area's
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* layout (see pdp/genassym.c). Note also that a networking stack is always
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* allocated even for non-networking systems. This prevents problems with
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* applications having to be recompiled for networking versus non-networking
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* systems.
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*/
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#define USIZE 3072
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#define SSIZE 2048 /* initial stack size (bytes) */
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#ifdef KERNEL
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#include "machine/io.h"
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/*
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* Macros to decode processor status word.
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*/
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#define USERMODE(ps) (((ps) & ST_UM) != 0)
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#define BASEPRI(ps) (CA_RIPL(ps) == 0)
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#define splbio() mips_intr_disable()
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#define spltty() mips_intr_disable()
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#define splclock() mips_intr_disable()
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#define splhigh() mips_intr_disable()
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#define splnet() mips_intr_enable()
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#define splsoftclock() mips_intr_enable()
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#define spl0() mips_intr_enable()
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#define splx(s) mips_intr_restore(s)
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#define noop() asm volatile("nop")
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/*
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* Wait for something to happen.
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*/
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void idle(void);
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/*
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* Microsecond delay routine.
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*/
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void udelay(unsigned usec);
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/*
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* Setup system timer for `hz' timer interrupts per second.
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*/
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void clkstart(void);
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/*
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* Control LEDs, installed on the board.
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*/
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#define LED_MISC4 0x80
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#define LED_MISC3 0x40
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#define LED_MISC2 0x20
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#define LED_MISC1 0x10
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#define LED_TTY 0x08
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#define LED_SWAP 0x04
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#define LED_DISK 0x02
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#define LED_KERNEL 0x01
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void led_control(int mask, int on);
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/*
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* Port i/o access, relative to TRIS base.
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*/
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#define TRIS_VAL(p) (&p)[0]
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#define TRIS_CLR(p) (&p)[1]
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#define TRIS_SET(p) (&p)[2]
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#define TRIS_INV(p) (&p)[3]
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#define PORT_VAL(p) (&p)[4]
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#define PORT_CLR(p) (&p)[5]
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#define PORT_SET(p) (&p)[6]
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#define PORT_INV(p) (&p)[7]
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#define LAT_VAL(p) (&p)[8]
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#define LAT_CLR(p) (&p)[9]
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#define LAT_SET(p) (&p)[10]
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#define LAT_INV(p) (&p)[11]
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/*
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* SD timeouts, for sysctl.
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*/
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extern int sd_timo_cmd;
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extern int sd_timo_send_op;
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extern int sd_timo_send_csd;
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extern int sd_timo_read;
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extern int sd_timo_wait_cmd;
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extern int sd_timo_wait_wdata;
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extern int sd_timo_wait_wdone;
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extern int sd_timo_wait_wstop;
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extern int sd_timo_wait_widle;
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#endif /* KERNEL */
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#endif /* ENDIAN */
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