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icswx.h
/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * ICSWX api * * Copyright (C) 2015 IBM Corp. * * This provides the Initiate Coprocessor Store Word Indexed (ICSWX) * instruction. This instruction is used to communicate with PowerPC * coprocessors. This also provides definitions of the structures used * to communicate with the coprocessor. * * The RFC02130: Coprocessor Architecture document is the reference for * everything in this file unless otherwise noted. */ #ifndef _ARCH_POWERPC_INCLUDE_ASM_ICSWX_H_ #define _ARCH_POWERPC_INCLUDE_ASM_ICSWX_H_ #include <asm/ppc-opcode.h> /* for PPC_ICSWX */ /* Chapter 6.5.8 Coprocessor-Completion Block (CCB) */ #define CCB_VALUE (0x3fffffffffffffff) #define CCB_ADDRESS (0xfffffffffffffff8) #define CCB_CM (0x0000000000000007) #define CCB_CM0 (0x0000000000000004) #define CCB_CM12 (0x0000000000000003) #define CCB_CM0_ALL_COMPLETIONS (0x0) #define CCB_CM0_LAST_IN_CHAIN (0x4) #define CCB_CM12_STORE (0x0) #define CCB_CM12_INTERRUPT (0x1) #define CCB_SIZE (0x10) #define CCB_ALIGN CCB_SIZE struct coprocessor_completion_block { __be64 value; __be64 address; } __packed __aligned(CCB_ALIGN); /* Chapter 6.5.7 Coprocessor-Status Block (CSB) */ #define CSB_V (0x80) #define CSB_F (0x04) #define CSB_CH (0x03) #define CSB_CE_INCOMPLETE (0x80) #define CSB_CE_TERMINATION (0x40) #define CSB_CE_TPBC (0x20) #define CSB_CC_SUCCESS (0) #define CSB_CC_INVALID_ALIGN (1) #define CSB_CC_OPERAND_OVERLAP (2) #define CSB_CC_DATA_LENGTH (3) #define CSB_CC_TRANSLATION (5) #define CSB_CC_PROTECTION (6) #define CSB_CC_RD_EXTERNAL (7) #define CSB_CC_INVALID_OPERAND (8) #define CSB_CC_PRIVILEGE (9) #define CSB_CC_INTERNAL (10) #define CSB_CC_WR_EXTERNAL (12) #define CSB_CC_NOSPC (13) #define CSB_CC_EXCESSIVE_DDE (14) #define CSB_CC_WR_TRANSLATION (15) #define CSB_CC_WR_PROTECTION (16) #define CSB_CC_UNKNOWN_CODE (17) #define CSB_CC_ABORT (18) #define CSB_CC_EXCEED_BYTE_COUNT (19) /* P9 or later */ #define CSB_CC_TRANSPORT (20) #define CSB_CC_INVALID_CRB (21) /* P9 or later */ #define CSB_CC_INVALID_DDE (30) /* P9 or later */ #define CSB_CC_SEGMENTED_DDL (31) #define CSB_CC_PROGRESS_POINT (32) #define CSB_CC_DDE_OVERFLOW (33) #define CSB_CC_SESSION (34) #define CSB_CC_PROVISION (36) #define CSB_CC_CHAIN (37) #define CSB_CC_SEQUENCE (38) #define CSB_CC_HW (39) /* P9 DD2 NX Workbook 3.2 (Table 4-36): Address translation fault */ #define CSB_CC_FAULT_ADDRESS (250) #define CSB_SIZE (0x10) #define CSB_ALIGN CSB_SIZE struct coprocessor_status_block { u8 flags; u8 cs; u8 cc; u8 ce; __be32 count; __be64 address; } __packed __aligned(CSB_ALIGN); /* Chapter 6.5.10 Data-Descriptor List (DDL) * each list contains one or more Data-Descriptor Entries (DDE) */ #define DDE_P (0x8000) #define DDE_SIZE (0x10) #define DDE_ALIGN DDE_SIZE struct data_descriptor_entry { __be16 flags; u8 count; u8 index; __be32 length; __be64 address; } __packed __aligned(DDE_ALIGN); /* 4.3.2 NX-stamped Fault CRB */ #define NX_STAMP_ALIGN (0x10) struct nx_fault_stamp { __be64 fault_storage_addr; __be16 reserved; __u8 flags; __u8 fault_status; __be32 pswid; } __packed __aligned(NX_STAMP_ALIGN); /* Chapter 6.5.2 Coprocessor-Request Block (CRB) */ #define CRB_SIZE (0x80) #define CRB_ALIGN (0x100) /* Errata: requires 256 alignment */ /* Coprocessor Status Block field * ADDRESS address of CSB * C CCB is valid * AT 0 = addrs are virtual, 1 = addrs are phys * M enable perf monitor */ #define CRB_CSB_ADDRESS (0xfffffffffffffff0) #define CRB_CSB_C (0x0000000000000008) #define CRB_CSB_AT (0x0000000000000002) #define CRB_CSB_M (0x0000000000000001) struct coprocessor_request_block { __be32 ccw; __be32 flags; __be64 csb_addr; struct data_descriptor_entry source; struct data_descriptor_entry target; struct coprocessor_completion_block ccb; union { struct nx_fault_stamp nx; u8 reserved[16]; } stamp; u8 reserved[32]; struct coprocessor_status_block csb; } __aligned(128); /* RFC02167 Initiate Coprocessor Instructions document * Chapter 8.2.1.1.1 RS * Chapter 8.2.3 Coprocessor Directive * Chapter 8.2.4 Execution * * The CCW must be converted to BE before passing to icswx() */ #define CCW_PS (0xff000000) #define CCW_CT (0x00ff0000) #define CCW_CD (0x0000ffff) #define CCW_CL (0x0000c000) /* RFC02167 Initiate Coprocessor Instructions document * Chapter 8.2.1 Initiate Coprocessor Store Word Indexed (ICSWX) * Chapter 8.2.4.1 Condition Register 0 */ #define ICSWX_INITIATED (0x8) #define ICSWX_BUSY (0x4) #define ICSWX_REJECTED (0x2) #define ICSWX_XERS0 (0x1) /* undefined or set from XERSO. */ static inline int icswx(__be32 ccw, struct coprocessor_request_block *crb) { __be64 ccw_reg = ccw; u32 cr; /* NB: the same structures are used by VAS-NX */ BUILD_BUG_ON(sizeof(*crb) != 128); __asm__ __volatile__( PPC_ICSWX(%1,0,%2) "\n" "mfcr %0\n" : "=r" (cr) : "r" (ccw_reg), "r" (crb) : "cr0", "memory"); return (int)((cr >> 28) & 0xf); } #endif /* _ARCH_POWERPC_INCLUDE_ASM_ICSWX_H_ */
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