1 /* 2 * QEMU SPAPR Option/Architecture Vector Definitions 3 * 4 * Each architecture option is organized/documented by the following 5 * in LoPAPR 1.1, Table 244: 6 * 7 * <vector number>: the bit-vector in which the option is located 8 * <vector byte>: the byte offset of the vector entry 9 * <vector bit>: the bit offset within the vector entry 10 * 11 * where each vector entry can be one or more bytes. 12 * 13 * Firmware expects a somewhat literal encoding of this bit-vector 14 * structure, where each entry is stored in little-endian so that the 15 * byte ordering reflects that of the documentation, but where each bit 16 * offset is from "left-to-right" in the traditional representation of 17 * a byte value where the MSB is the left-most bit. Thus, each 18 * individual byte encodes the option bits in reverse order of the 19 * documented bit. 20 * 21 * These definitions/helpers attempt to abstract away this internal 22 * representation so that we can define/set/test for individual option 23 * bits using only the documented values. This is done mainly by relying 24 * on a bitmap to approximate the documented "bit-vector" structure and 25 * handling conversations to-from the internal representation under the 26 * covers. 27 * 28 * Copyright IBM Corp. 2016 29 * 30 * Authors: 31 * Michael Roth <mdroth@linux.vnet.ibm.com> 32 * 33 * This work is licensed under the terms of the GNU GPL, version 2 or later. 34 * See the COPYING file in the top-level directory. 35 */ 36 #ifndef _SPAPR_OVEC_H 37 #define _SPAPR_OVEC_H 38 39 #include "cpu.h" 40 41 typedef struct sPAPROptionVector sPAPROptionVector; 42 43 #define OV_BIT(byte, bit) ((byte - 1) * BITS_PER_BYTE + bit) 44 45 /* option vector 5 */ 46 #define OV5_DRCONF_MEMORY OV_BIT(2, 2) 47 #define OV5_FORM1_AFFINITY OV_BIT(5, 0) 48 49 /* interfaces */ 50 sPAPROptionVector *spapr_ovec_new(void); 51 sPAPROptionVector *spapr_ovec_clone(sPAPROptionVector *ov_orig); 52 void spapr_ovec_intersect(sPAPROptionVector *ov, 53 sPAPROptionVector *ov1, 54 sPAPROptionVector *ov2); 55 bool spapr_ovec_diff(sPAPROptionVector *ov, 56 sPAPROptionVector *ov_old, 57 sPAPROptionVector *ov_new); 58 void spapr_ovec_cleanup(sPAPROptionVector *ov); 59 void spapr_ovec_set(sPAPROptionVector *ov, long bitnr); 60 void spapr_ovec_clear(sPAPROptionVector *ov, long bitnr); 61 bool spapr_ovec_test(sPAPROptionVector *ov, long bitnr); 62 sPAPROptionVector *spapr_ovec_parse_vector(target_ulong table_addr, int vector); 63 int spapr_ovec_populate_dt(void *fdt, int fdt_offset, 64 sPAPROptionVector *ov, const char *name); 65 66 #endif /* !defined (_SPAPR_OVEC_H) */ 67