cregit-Linux how code gets into the kernel

Release 4.14 arch/powerpc/include/asm/ohare.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_OHARE_H

#define _ASM_POWERPC_OHARE_H
#ifdef __KERNEL__
/*
 * ohare.h: definitions for using the "O'Hare" I/O controller chip.
 *
 * Copyright (C) 1997 Paul Mackerras.
 *
 * BenH: Changed to match those of heathrow (but not all of them). Please
 *       check if I didn't break anything (especially the media bay).
 */

/* offset from ohare base for feature control register */

#define OHARE_MBCR	0x34

#define OHARE_FCR	0x38

/*
 * Bits in feature control register.
 * These were mostly derived by experiment on a powerbook 3400
 * and may differ for other machines.
 */

#define OH_SCC_RESET		1

#define OH_BAY_POWER_N		2	
/* a guess */

#define OH_BAY_PCI_ENABLE	4	
/* a guess */

#define OH_BAY_IDE_ENABLE	8

#define OH_BAY_FLOPPY_ENABLE	0x10

#define OH_IDE0_ENABLE		0x20

#define OH_IDE0_RESET_N		0x40	
/* a guess */

#define OH_BAY_DEV_MASK		0x1c

#define OH_BAY_RESET_N		0x80

#define OH_IOBUS_ENABLE		0x100	
/* IOBUS seems to be IDE */

#define OH_SCC_ENABLE		0x200

#define OH_MESH_ENABLE		0x400

#define OH_FLOPPY_ENABLE	0x800

#define OH_SCCA_IO		0x4000

#define OH_SCCB_IO		0x8000

#define OH_VIA_ENABLE		0x10000	
/* Is apparently wrong, to be verified */

#define OH_IDE1_RESET_N		0x800000

/*
 * Bits to set in the feature control register on PowerBooks.
 */

#define PBOOK_FEATURES		(OH_IDE_ENABLE | OH_SCC_ENABLE | \
                                 OH_MESH_ENABLE | OH_SCCA_IO | OH_SCCB_IO)

/*
 * A magic value to put into the feature control register of the
 * "ohare" I/O controller on Starmaxes to enable the IDE CD interface.
 * Contributed by Harry Eaton.
 */

#define STARMAX_FEATURES	0xbeff7a

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_OHARE_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8476.36%444.44%
Arnd Bergmann1311.82%111.11%
Paul Mackerras1110.00%222.22%
Tom Rini10.91%111.11%
Greg Kroah-Hartman10.91%111.11%
Total110100.00%9100.00%
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