arch/mips/include/asm/dec/prom.h

Source file repositories/reference/linux-study-clean/arch/mips/include/asm/dec/prom.h

File Facts

System
Linux kernel
Corpus path
arch/mips/include/asm/dec/prom.h
Extension
.h
Size
5494 bytes
Lines
176
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _ASM_DEC_PROM_H
#define _ASM_DEC_PROM_H

#include <linux/types.h>

#include <asm/addrspace.h>

/*
 * PMAX/3MAX PROM entry points for DS2100/3100's and DS5000/2xx's.
 * Many of these will work for MIPSen as well!
 */
#define VEC_RESET		(u64 *)CKSEG1ADDR(0x1fc00000)
							/* Prom base address */

#define PMAX_PROM_ENTRY(x)	(VEC_RESET + (x))	/* Prom jump table */

#define PMAX_PROM_HALT		PMAX_PROM_ENTRY(2)	/* valid on MIPSen */
#define PMAX_PROM_AUTOBOOT	PMAX_PROM_ENTRY(5)	/* valid on MIPSen */
#define PMAX_PROM_OPEN		PMAX_PROM_ENTRY(6)
#define PMAX_PROM_READ		PMAX_PROM_ENTRY(7)
#define PMAX_PROM_CLOSE		PMAX_PROM_ENTRY(10)
#define PMAX_PROM_LSEEK		PMAX_PROM_ENTRY(11)
#define PMAX_PROM_GETCHAR	PMAX_PROM_ENTRY(12)
#define PMAX_PROM_PUTCHAR	PMAX_PROM_ENTRY(13)	/* 12 on MIPSen */
#define PMAX_PROM_GETS		PMAX_PROM_ENTRY(15)
#define PMAX_PROM_PRINTF	PMAX_PROM_ENTRY(17)
#define PMAX_PROM_GETENV	PMAX_PROM_ENTRY(33)	/* valid on MIPSen */


/*
 * Magic number indicating REX PROM available on DECstation.  Found in
 * register a2 on transfer of control to program from PROM.
 */
#define REX_PROM_MAGIC		0x30464354

/* KN04 and KN05 are REX PROMs, so only do the check for R3k systems.  */
static inline bool prom_is_rex(u32 magic)
{
	return !IS_ENABLED(CONFIG_CPU_R3000) || magic == REX_PROM_MAGIC;
}

/*
 * 3MIN/MAXINE PROM entry points for DS5000/1xx's, DS5000/xx's and
 * DS5000/2x0.
 */
#define REX_PROM_GETBITMAP	0x84/4	/* get mem bitmap */
#define REX_PROM_GETCHAR	0x24/4	/* getch() */
#define REX_PROM_GETENV		0x64/4	/* get env. variable */
#define REX_PROM_GETSYSID	0x80/4	/* get system id */
#define REX_PROM_GETTCINFO	0xa4/4
#define REX_PROM_PRINTF		0x30/4	/* printf() */
#define REX_PROM_SLOTADDR	0x6c/4	/* slotaddr */
#define REX_PROM_BOOTINIT	0x54/4	/* open() */
#define REX_PROM_BOOTREAD	0x58/4	/* read() */
#define REX_PROM_CLEARCACHE	0x7c/4


/*
 * Used by rex_getbitmap().
 */
typedef struct {
	int pagesize;
	unsigned char bitmap[];
} memmap;


/*
 * Function pointers as read from a PROM's callback vector.
 */
extern int (*__rex_bootinit)(void);
extern int (*__rex_bootread)(void);
extern int (*__rex_getbitmap)(memmap *);
extern unsigned long *(*__rex_slot_address)(int);
extern void *(*__rex_gettcinfo)(void);
extern int (*__rex_getsysid)(void);
extern void (*__rex_clear_cache)(void);

extern int (*__prom_getchar)(void);
extern char *(*__prom_getenv)(char *);
extern int (*__prom_printf)(char *, ...);

extern int (*__pmax_open)(char*, int);
extern int (*__pmax_lseek)(int, long, int);
extern int (*__pmax_read)(int, void *, int);
extern int (*__pmax_close)(int);


#ifdef CONFIG_64BIT

#define O32_STK_SIZE 512

Annotation

Implementation Notes