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/*
* QEMU SPAPR Option/Architecture Vector Definitions
*
* Each architecture option is organized/documented by the following
* in LoPAPR 1.1, Table 244:
*
* <vector number>: the bit-vector in which the option is located
* <vector byte>: the byte offset of the vector entry
* <vector bit>: the bit offset within the vector entry
*
* where each vector entry can be one or more bytes.
*
* Firmware expects a somewhat literal encoding of this bit-vector
* structure, where each entry is stored in little-endian so that the
* byte ordering reflects that of the documentation, but where each bit
* offset is from "left-to-right" in the traditional representation of
* a byte value where the MSB is the left-most bit. Thus, each
* individual byte encodes the option bits in reverse order of the
* documented bit.
*
* These definitions/helpers attempt to abstract away this internal
* representation so that we can define/set/test for individual option
* bits using only the documented values. This is done mainly by relying
* on a bitmap to approximate the documented "bit-vector" structure and
* handling conversations to-from the internal representation under the
* covers.
*
* Copyright IBM Corp. 2016
*
* Authors:
* Michael Roth <mdroth@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef _SPAPR_OVEC_H
#define _SPAPR_OVEC_H
#include "cpu.h"
typedef struct sPAPROptionVector sPAPROptionVector;
#define OV_BIT(byte, bit) ((byte - 1) * BITS_PER_BYTE + bit)
/* option vector 5 */
#define OV5_DRCONF_MEMORY OV_BIT(2, 2)
#define OV5_FORM1_AFFINITY OV_BIT(5, 0)
/* interfaces */
sPAPROptionVector *spapr_ovec_new(void);
sPAPROptionVector *spapr_ovec_clone(sPAPROptionVector *ov_orig);
void spapr_ovec_intersect(sPAPROptionVector *ov,
sPAPROptionVector *ov1,
sPAPROptionVector *ov2);
bool spapr_ovec_diff(sPAPROptionVector *ov,
sPAPROptionVector *ov_old,
sPAPROptionVector *ov_new);
void spapr_ovec_cleanup(sPAPROptionVector *ov);
void spapr_ovec_set(sPAPROptionVector *ov, long bitnr);
void spapr_ovec_clear(sPAPROptionVector *ov, long bitnr);
bool spapr_ovec_test(sPAPROptionVector *ov, long bitnr);
sPAPROptionVector *spapr_ovec_parse_vector(target_ulong table_addr, int vector);
int spapr_ovec_populate_dt(void *fdt, int fdt_offset,
sPAPROptionVector *ov, const char *name);
#endif /* !defined (_SPAPR_OVEC_H) */
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