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| -rw-r--r-- | arch/powerpc/include/asm/processor.h | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h new file mode 100644 index 0000000000..b2c51d337e --- /dev/null +++ b/arch/powerpc/include/asm/processor.h @@ -0,0 +1,453 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef _ASM_POWERPC_PROCESSOR_H +#define _ASM_POWERPC_PROCESSOR_H + +/* + * Copyright (C) 2001 PPC 64 Team, IBM Corp + */ + +#include <vdso/processor.h> + +#include <asm/reg.h> + +#ifdef CONFIG_VSX +#define TS_FPRWIDTH 2 + +#ifdef __BIG_ENDIAN__ +#define TS_FPROFFSET 0 +#define TS_VSRLOWOFFSET 1 +#else +#define TS_FPROFFSET 1 +#define TS_VSRLOWOFFSET 0 +#endif + +#else +#define TS_FPRWIDTH 1 +#define TS_FPROFFSET 0 +#endif + +#ifdef CONFIG_PPC64 +/* Default SMT priority is set to 3. Use 11- 13bits to save priority. */ +#define PPR_PRIORITY 3 +#ifdef __ASSEMBLY__ +#define DEFAULT_PPR (PPR_PRIORITY << 50) +#else +#define DEFAULT_PPR ((u64)PPR_PRIORITY << 50) +#endif /* __ASSEMBLY__ */ +#endif /* CONFIG_PPC64 */ + +#ifndef __ASSEMBLY__ +#include <linux/types.h> +#include <linux/thread_info.h> +#include <asm/ptrace.h> +#include <asm/hw_breakpoint.h> + +/* We do _not_ want to define new machine types at all, those must die + * in favor of using the device-tree + * -- BenH. + */ + +/* PREP sub-platform types. Unused */ +#define _PREP_Motorola 0x01 /* motorola prep */ +#define _PREP_Firm 0x02 /* firmworks prep */ +#define _PREP_IBM 0x00 /* ibm prep */ +#define _PREP_Bull 0x03 /* bull prep */ + +/* CHRP sub-platform types. These are arbitrary */ +#define _CHRP_Motorola 0x04 /* motorola chrp, the cobra */ +#define _CHRP_IBM 0x05 /* IBM chrp, the longtrail and longtrail 2 */ +#define _CHRP_Pegasos 0x06 /* Genesi/bplan's Pegasos and Pegasos2 */ +#define _CHRP_briq 0x07 /* TotalImpact's briQ */ + +#if defined(__KERNEL__) && defined(CONFIG_PPC32) + +extern int _chrp_type; + +#endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */ + +#ifdef __KERNEL__ + +#ifdef CONFIG_PPC64 +#include <asm/task_size_64.h> +#else +#include <asm/task_size_32.h> +#endif + +struct task_struct; +void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp); + +#define TS_FPR(i) fp_state.fpr[i][TS_FPROFFSET] +#define TS_CKFPR(i) ckfp_state.fpr[i][TS_FPROFFSET] + +/* FP and VSX 0-31 register set */ +struct thread_fp_state { + u64 fpr[32][TS_FPRWIDTH] __attribute__((aligned(16))); + u64 fpscr; /* Floating point status */ +}; + +/* Complete AltiVec register set including VSCR */ +struct thread_vr_state { + vector128 vr[32] __attribute__((aligned(16))); + vector128 vscr __attribute__((aligned(16))); +}; + +struct debug_reg { +#ifdef CONFIG_PPC_ADV_DEBUG_REGS + /* + * The following help to manage the use of Debug Control Registers + * om the BookE platforms. + */ + uint32_t dbcr0; + uint32_t dbcr1; +#ifdef CONFIG_BOOKE + uint32_t dbcr2; +#endif + /* + * The stored value of the DBSR register will be the value at the + * last debug interrupt. This register can only be read from the + * user (will never be written to) and has value while helping to + * describe the reason for the last debug trap. Torez + */ + uint32_t dbsr; + /* + * The following will contain addresses used by debug applications + * to help trace and trap on particular address locations. + * The bits in the Debug Control Registers above help define which + * of the following registers will contain valid data and/or addresses. + */ + unsigned long iac1; + unsigned long iac2; +#if CONFIG_PPC_ADV_DEBUG_IACS > 2 + unsigned long iac3; + unsigned long iac4; +#endif + unsigned long dac1; + unsigned long dac2; +#if CONFIG_PPC_ADV_DEBUG_DVCS > 0 + unsigned long dvc1; + unsigned long dvc2; +#endif +#endif +}; + +struct thread_struct { + unsigned long ksp; /* Kernel stack pointer */ + +#ifdef CONFIG_PPC64 + unsigned long ksp_vsid; +#endif + struct pt_regs *regs; /* Pointer to saved register state */ +#ifdef CONFIG_BOOKE + /* BookE base exception scratch space; align on cacheline */ + unsigned long normsave[8] ____cacheline_aligned; +#endif +#ifdef CONFIG_PPC32 + void *pgdir; /* root of page-table tree */ +#ifdef CONFIG_PPC_RTAS + unsigned long rtas_sp; /* stack pointer for when in RTAS */ +#endif +#if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_PPC_KUAP) + unsigned long kuap; /* opened segments for user access */ +#endif + unsigned long srr0; + unsigned long srr1; + unsigned long dar; + unsigned long dsisr; +#ifdef CONFIG_PPC_BOOK3S_32 + unsigned long r0, r3, r4, r5, r6, r8, r9, r11; + unsigned long lr, ctr; + unsigned long sr0; +#endif +#endif /* CONFIG_PPC32 */ +#if defined(CONFIG_BOOKE_OR_40x) && defined(CONFIG_PPC_KUAP) + unsigned long pid; /* value written in PID reg. at interrupt exit */ +#endif + /* Debug Registers */ + struct debug_reg debug; +#ifdef CONFIG_PPC_FPU_REGS + struct thread_fp_state fp_state; + struct thread_fp_state *fp_save_area; +#endif + int fpexc_mode; /* floating-point exception mode */ + unsigned int align_ctl; /* alignment handling control */ +#ifdef CONFIG_HAVE_HW_BREAKPOINT + struct perf_event *ptrace_bps[HBP_NUM_MAX]; +#endif /* CONFIG_HAVE_HW_BREAKPOINT */ + struct arch_hw_breakpoint hw_brk[HBP_NUM_MAX]; /* hardware breakpoint info */ + unsigned long trap_nr; /* last trap # on this thread */ + u8 load_slb; /* Ages out SLB preload cache entries */ + u8 load_fp; +#ifdef CONFIG_ALTIVEC + u8 load_vec; + struct thread_vr_state vr_state; + struct thread_vr_state *vr_save_area; + unsigned long vrsave; + int used_vr; /* set if process has used altivec */ +#endif /* CONFIG_ALTIVEC */ +#ifdef CONFIG_VSX + /* VSR status */ + int used_vsr; /* set if process has used VSX */ +#endif /* CONFIG_VSX */ +#ifdef CONFIG_SPE + struct_group(spe, + unsigned long evr[32]; /* upper 32-bits of SPE regs */ + u64 acc; /* Accumulator */ + ); + unsigned long spefscr; /* SPE & eFP status */ + unsigned long spefscr_last; /* SPEFSCR value on last prctl + call or trap return */ + int used_spe; /* set if process has used spe */ +#endif /* CONFIG_SPE */ +#ifdef CONFIG_PPC_TRANSACTIONAL_MEM + u8 load_tm; + u64 tm_tfhar; /* Transaction fail handler addr */ + u64 tm_texasr; /* Transaction exception & summary */ + u64 tm_tfiar; /* Transaction fail instr address reg */ + struct pt_regs ckpt_regs; /* Checkpointed registers */ + + unsigned long tm_tar; + unsigned long tm_ppr; + unsigned long tm_dscr; + unsigned long tm_amr; + + /* + * Checkpointed FP and VSX 0-31 register set. + * + * When a transaction is active/signalled/scheduled etc., *regs is the + * most recent set of/speculated GPRs with ckpt_regs being the older + * checkpointed regs to which we roll back if transaction aborts. + * + * These are analogous to how ckpt_regs and pt_regs work + */ + struct thread_fp_state ckfp_state; /* Checkpointed FP state */ + struct thread_vr_state ckvr_state; /* Checkpointed VR state */ + unsigned long ckvrsave; /* Checkpointed VRSAVE */ +#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ +#ifdef CONFIG_KVM_BOOK3S_32_HANDLER + void* kvm_shadow_vcpu; /* KVM internal data */ +#endif /* CONFIG_KVM_BOOK3S_32_HANDLER */ +#if defined(CONFIG_KVM) && defined(CONFIG_BOOKE) + struct kvm_vcpu *kvm_vcpu; +#endif +#ifdef CONFIG_PPC64 + unsigned long dscr; + unsigned long fscr; + /* + * This member element dscr_inherit indicates that the process + * has explicitly attempted and changed the DSCR register value + * for itself. Hence kernel wont use the default CPU DSCR value + * contained in the PACA structure anymore during process context + * switch. Once this variable is set, this behaviour will also be + * inherited to all the children of this process from that point + * onwards. + */ + int dscr_inherit; + unsigned long tidr; +#endif +#ifdef CONFIG_PPC_BOOK3S_64 + unsigned long tar; + unsigned long ebbrr; + unsigned long ebbhr; + unsigned long bescr; + unsigned long siar; + unsigned long sdar; + unsigned long sier; + unsigned long mmcr2; + unsigned mmcr0; + + unsigned used_ebb; + unsigned long mmcr3; + unsigned long sier2; + unsigned long sier3; + unsigned long hashkeyr; + +#endif +}; + +#define ARCH_MIN_TASKALIGN 16 + +#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack) +#define INIT_SP_LIMIT ((unsigned long)&init_stack) + +#ifdef CONFIG_SPE +#define SPEFSCR_INIT \ + .spefscr = SPEFSCR_FINVE | SPEFSCR_FDBZE | SPEFSCR_FUNFE | SPEFSCR_FOVFE, \ + .spefscr_last = SPEFSCR_FINVE | SPEFSCR_FDBZE | SPEFSCR_FUNFE | SPEFSCR_FOVFE, +#else +#define SPEFSCR_INIT +#endif + +#ifdef CONFIG_PPC_BOOK3S_32 +#define SR0_INIT .sr0 = IS_ENABLED(CONFIG_PPC_KUEP) ? SR_NX : 0, +#else +#define SR0_INIT +#endif + +#if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_PPC_KUAP) +#define INIT_THREAD { \ + .ksp = INIT_SP, \ + .pgdir = swapper_pg_dir, \ + .kuap = ~0UL, /* KUAP_NONE */ \ + .fpexc_mode = MSR_FE0 | MSR_FE1, \ + SPEFSCR_INIT \ + SR0_INIT \ +} +#elif defined(CONFIG_PPC32) +#define INIT_THREAD { \ + .ksp = INIT_SP, \ + .pgdir = swapper_pg_dir, \ + .fpexc_mode = MSR_FE0 | MSR_FE1, \ + SPEFSCR_INIT \ + SR0_INIT \ +} +#else +#define INIT_THREAD { \ + .ksp = INIT_SP, \ + .fpexc_mode = 0, \ +} +#endif + +#define task_pt_regs(tsk) ((tsk)->thread.regs) + +unsigned long __get_wchan(struct task_struct *p); + +#define KSTK_EIP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0) +#define KSTK_ESP(tsk) ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0) + +/* Get/set floating-point exception mode */ +#define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr)) +#define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val)) + +extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr); +extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val); + +#define GET_ENDIAN(tsk, adr) get_endian((tsk), (adr)) +#define SET_ENDIAN(tsk, val) set_endian((tsk), (val)) + +extern int get_endian(struct task_struct *tsk, unsigned long adr); +extern int set_endian(struct task_struct *tsk, unsigned int val); + +#define GET_UNALIGN_CTL(tsk, adr) get_unalign_ctl((tsk), (adr)) +#define SET_UNALIGN_CTL(tsk, val) set_unalign_ctl((tsk), (val)) + +extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr); +extern int set_unalign_ctl(struct task_struct *tsk, unsigned int val); + +extern void load_fp_state(struct thread_fp_state *fp); +extern void store_fp_state(struct thread_fp_state *fp); +extern void load_vr_state(struct thread_vr_state *vr); +extern void store_vr_state(struct thread_vr_state *vr); + +static inline unsigned int __unpack_fe01(unsigned long msr_bits) +{ + return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8); +} + +static inline unsigned long __pack_fe01(unsigned int fpmode) +{ + return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1); +} + +#ifdef CONFIG_PPC64 + +#define spin_begin() \ + asm volatile(ASM_FTR_IFCLR( \ + "or 1,1,1", /* HMT_LOW */ \ + "nop", /* v3.1 uses pause_short in cpu_relax instead */ \ + %0) :: "i" (CPU_FTR_ARCH_31) : "memory") + +#define spin_cpu_relax() \ + asm volatile(ASM_FTR_IFCLR( \ + "nop", /* Before v3.1 use priority nops in spin_begin/end */ \ + PPC_WAIT(2, 0), /* aka pause_short */ \ + %0) :: "i" (CPU_FTR_ARCH_31) : "memory") + +#define spin_end() \ + asm volatile(ASM_FTR_IFCLR( \ + "or 2,2,2", /* HMT_MEDIUM */ \ + "nop", \ + %0) :: "i" (CPU_FTR_ARCH_31) : "memory") + +#endif + +/* + * Check that a certain kernel stack pointer is a valid (minimum sized) + * stack frame in task_struct p. + */ +int validate_sp(unsigned long sp, struct task_struct *p); + +/* + * validate the stack frame of a particular minimum size, used for when we are + * looking at a certain object in the stack beyond the minimum. + */ +int validate_sp_size(unsigned long sp, struct task_struct *p, + unsigned long nbytes); + +/* + * Prefetch macros. + */ +#define ARCH_HAS_PREFETCH +#define ARCH_HAS_PREFETCHW + +static inline void prefetch(const void *x) +{ + if (unlikely(!x)) + return; + + __asm__ __volatile__ ("dcbt 0,%0" : : "r" (x)); +} + +static inline void prefetchw(const void *x) +{ + if (unlikely(!x)) + return; + + __asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x)); +} + +/* asm stubs */ +extern unsigned long isa300_idle_stop_noloss(unsigned long psscr_val); +extern unsigned long isa300_idle_stop_mayloss(unsigned long psscr_val); +extern unsigned long isa206_idle_insn_mayloss(unsigned long type); +#ifdef CONFIG_PPC_970_NAP +extern void power4_idle_nap(void); +void power4_idle_nap_return(void); +#endif + +extern unsigned long cpuidle_disable; +enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF}; + +extern int powersave_nap; /* set if nap mode can be used in idle loop */ + +extern void power7_idle_type(unsigned long type); +extern void arch300_idle_type(unsigned long stop_psscr_val, + unsigned long stop_psscr_mask); +void pnv_power9_force_smt4_catch(void); +void pnv_power9_force_smt4_release(void); + +extern int fix_alignment(struct pt_regs *); + +#ifdef CONFIG_PPC64 +/* + * We handle most unaligned accesses in hardware. On the other hand + * unaligned DMA can be very expensive on some ppc64 IO chips (it does + * powers of 2 writes until it reaches sufficient alignment). + * + * Based on this we disable the IP header alignment in network drivers. + */ +#define NET_IP_ALIGN 0 +#endif + +int do_mathemu(struct pt_regs *regs); +int do_spe_mathemu(struct pt_regs *regs); +int speround_handler(struct pt_regs *regs); + +/* VMX copying */ +int enter_vmx_usercopy(void); +int exit_vmx_usercopy(void); +int enter_vmx_ops(void); +void *exit_vmx_ops(void *dest); + +#endif /* __KERNEL__ */ +#endif /* __ASSEMBLY__ */ +#endif /* _ASM_POWERPC_PROCESSOR_H */ |