/* * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef _ASM_ARC_ARCREGS_H #define _ASM_ARC_ARCREGS_H #ifdef __KERNEL__ /* Build Configuration Registers */ #define ARC_REG_VECBASE_BCR 0x68 #define ARC_REG_MMU_BCR 0x6f /* status32 Bits Positions */ #define STATUS_H_BIT 0 /* CPU Halted */ #define STATUS_E1_BIT 1 /* Int 1 enable */ #define STATUS_E2_BIT 2 /* Int 2 enable */ #define STATUS_A1_BIT 3 /* Int 1 active */ #define STATUS_A2_BIT 4 /* Int 2 active */ #define STATUS_AE_BIT 5 /* Exception active */ #define STATUS_DE_BIT 6 /* PC is in delay slot */ #define STATUS_U_BIT 7 /* User/Kernel mode */ #define STATUS_L_BIT 12 /* Loop inhibit */ /* These masks correspond to the status word(STATUS_32) bits */ #define STATUS_H_MASK (1<= 2) #define TLBWriteNI 0x5 /* write JTLB without inv uTLBs */ #define TLBIVUTLB 0x6 /* explicitly inv uTLBs */ #else #undef TLBWriteNI /* These cmds don't exist on older MMU */ #undef TLBIVUTLB #endif /* Instruction cache related Auxiliary registers */ #define ARC_REG_IC_BCR 0x77 /* Build Config reg */ #define ARC_REG_IC_IVIC 0x10 #define ARC_REG_IC_CTRL 0x11 #define ARC_REG_IC_IVIL 0x19 #if (CONFIG_ARC_MMU_VER > 2) #define ARC_REG_IC_PTAG 0x1E #endif /* Bit val in IC_CTRL */ #define IC_CTRL_CACHE_DISABLE 0x1 /* Data cache related Auxiliary registers */ #define ARC_REG_DC_BCR 0x72 #define ARC_REG_DC_IVDC 0x47 #define ARC_REG_DC_CTRL 0x48 #define ARC_REG_DC_IVDL 0x4A #define ARC_REG_DC_FLSH 0x4B #define ARC_REG_DC_FLDL 0x4C #if (CONFIG_ARC_MMU_VER > 2) #define ARC_REG_DC_PTAG 0x5C #endif /* Bit val in DC_CTRL */ #define DC_CTRL_INV_MODE_FLUSH 0x40 #define DC_CTRL_FLUSH_STATUS 0x100 /* MMU Management regs */ #define ARC_REG_PID 0x409 #define ARC_REG_SCRATCH_DATA0 0x418 /* Bits in MMU PID register */ #define MMU_ENABLE (1 << 31) /* Enable MMU for process */ /* * Floating Pt Registers * Status regs are read-only (build-time) so need not be saved/restored */ #define ARC_AUX_FP_STAT 0x300 #define ARC_AUX_DPFP_1L 0x301 #define ARC_AUX_DPFP_1H 0x302 #define ARC_AUX_DPFP_2L 0x303 #define ARC_AUX_DPFP_2H 0x304 #define ARC_AUX_DPFP_STAT 0x305 #ifndef __ASSEMBLY__ /* ****************************************************************** * Inline ASM macros to read/write AUX Regs * Essentially invocation of lr/sr insns from "C" */ #if 1 #define read_aux_reg(reg) __builtin_arc_lr(reg) /* gcc builtin sr needs reg param to be long immediate */ #define write_aux_reg(reg_immed, val) \ __builtin_arc_sr((unsigned int)val, reg_immed) #else #define read_aux_reg(reg) \ ({ \ unsigned int __ret; \ __asm__ __volatile__( \ " lr %0, [%1]" \ : "=r"(__ret) \ : "i"(reg)); \ __ret; \ }) /* * Aux Reg address is specified as long immediate by caller * e.g. * write_aux_reg(0x69, some_val); * This generates tightest code. */ #define write_aux_reg(reg_imm, val) \ ({ \ __asm__ __volatile__( \ " sr %0, [%1] \n" \ : \ : "ir"(val), "i"(reg_imm)); \ }) /* * Aux Reg address is specified in a variable * * e.g. * reg_num = 0x69 * write_aux_reg2(reg_num, some_val); * This has to generate glue code to load the reg num from * memory to a reg hence not recommended. */ #define write_aux_reg2(reg_in_var, val) \ ({ \ unsigned int tmp; \ \ __asm__ __volatile__( \ " ld %0, [%2] \n\t" \ " sr %1, [%0] \n\t" \ : "=&r"(tmp) \ : "r"(val), "memory"(®_in_var)); \ }) #endif #define READ_BCR(reg, into) \ { \ unsigned int tmp; \ tmp = read_aux_reg(reg); \ if (sizeof(tmp) == sizeof(into)) { \ into = *((typeof(into) *)&tmp); \ } else { \ extern void bogus_undefined(void); \ bogus_undefined(); \ } \ } #define WRITE_BCR(reg, into) \ { \ unsigned int tmp; \ if (sizeof(tmp) == sizeof(into)) { \ tmp = (*(unsigned int *)(into)); \ write_aux_reg(reg, tmp); \ } else { \ extern void bogus_undefined(void); \ bogus_undefined(); \ } \ } /* Helpers */ #define TO_KB(bytes) ((bytes) >> 10) #define TO_MB(bytes) (TO_KB(bytes) >> 10) #define PAGES_TO_KB(n_pages) ((n_pages) << (PAGE_SHIFT - 10)) #define PAGES_TO_MB(n_pages) (PAGES_TO_KB(n_pages) >> 10) #ifdef CONFIG_ARC_FPU_SAVE_RESTORE /* These DPFP regs need to be saved/restored across ctx-sw */ struct arc_fpu { struct { unsigned int l, h; } aux_dpfp[2]; }; #endif /* *************************************************************** * Build Configuration Registers, with encoded hardware config */ struct bcr_mmu_1_2 { #ifdef CONFIG_CPU_BIG_ENDIAN unsigned int ver:8, ways:4, sets:4, u_itlb:8, u_dtlb:8; #else unsigned int u_dtlb:8, u_itlb:8, sets:4, ways:4, ver:8; #endif }; struct bcr_mmu_3 { #ifdef CONFIG_CPU_BIG_ENDIAN unsigned int ver:8, ways:4, sets:4, osm:1, reserv:3, pg_sz:4, u_itlb:4, u_dtlb:4; #else unsigned int u_dtlb:4, u_itlb:4, pg_sz:4, reserv:3, osm:1, sets:4, ways:4, ver:8; #endif }; struct bcr_cache { #ifdef CONFIG_CPU_BIG_ENDIAN unsigned int pad:12, line_len:4, sz:4, config:4, ver:8; #else unsigned int ver:8, config:4, sz:4, line_len:4, pad:12; #endif }; /* ******************************************************************* * Generic structures to hold build configuration used at runtime */ struct cpuinfo_arc_mmu { unsigned int ver, pg_sz, sets, ways, u_dtlb, u_itlb, num_tlb; }; struct cpuinfo_arc_cache { unsigned int has_aliasing, sz, line_len, assoc, ver; }; struct cpuinfo_arc { struct cpuinfo_arc_cache icache, dcache; struct cpuinfo_arc_mmu mmu; }; extern struct cpuinfo_arc cpuinfo_arc700[]; #endif /* __ASEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_ARC_ARCREGS_H */