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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/atomic.h>#include <linux/cpumask.h>#include <linux/sizes.h>#include <linux/threads.h>
#include <asm/cachectl.h>#include <asm/cpu.h>#include <asm/cpu-info.h>#include <asm/dsemul.h>#include <asm/mipsregs.h>#include <asm/prefetch.h>#include <asm/vdso/processor.h>
/* * System setup and hardware flags.. */
extern unsigned int vced_count, vcei_count;extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
#ifdef CONFIG_32BIT/* * User space process size: 2GB. This is hardcoded into a few places, * so don't change it unless you know what you are doing. */#define TASK_SIZE 0x80000000UL
#define STACK_TOP_MAX TASK_SIZE
#define TASK_IS_32BIT_ADDR 1
#endif
#ifdef CONFIG_64BIT/* * User space process size: 1TB. This is hardcoded into a few places, * so don't change it unless you know what you are doing. TASK_SIZE * is limited to 1TB by the R4000 architecture; R10000 and better can * support 16TB; the architectural reserve for future expansion is * 8192EB ... */#define TASK_SIZE32 0x7fff8000UL#ifdef CONFIG_MIPS_VA_BITS_48#define TASK_SIZE64 (0x1UL << ((cpu_data[0].vmbits>48)?48:cpu_data[0].vmbits))#else#define TASK_SIZE64 0x10000000000UL#endif#define TASK_SIZE (test_thread_flag(TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE64)#define STACK_TOP_MAX TASK_SIZE64
#define TASK_SIZE_OF(tsk) \ (test_tsk_thread_flag(tsk, TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE64)
#define TASK_IS_32BIT_ADDR test_thread_flag(TIF_32BIT_ADDR)
#endif
#define VDSO_RANDOMIZE_SIZE (TASK_IS_32BIT_ADDR ? SZ_1M : SZ_64M)
extern unsigned long mips_stack_top(void);#define STACK_TOP mips_stack_top()
/* * This decides where the kernel will search for a free chunk of vm * space during mmap's. */#define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3)
#define NUM_FPU_REGS 32
#ifdef CONFIG_CPU_HAS_MSA# define FPU_REG_WIDTH 128#else# define FPU_REG_WIDTH 64#endif
union fpureg { __u32 val32[FPU_REG_WIDTH / 32]; __u64 val64[FPU_REG_WIDTH / 64];};
#ifdef CONFIG_CPU_LITTLE_ENDIAN# define FPR_IDX(width, idx) (idx)#else# define FPR_IDX(width, idx) ((idx) ^ ((64 / (width)) - 1))#endif
#define BUILD_FPR_ACCESS(width) \static inline u##width get_fpr##width(union fpureg *fpr, unsigned idx) \{ \ return fpr->val##width[FPR_IDX(width, idx)]; \} \ \static inline void set_fpr##width(union fpureg *fpr, unsigned idx, \ u##width val) \{ \ fpr->val##width[FPR_IDX(width, idx)] = val; \}
BUILD_FPR_ACCESS(32)BUILD_FPR_ACCESS(64)
/* * It would be nice to add some more fields for emulator statistics, * the additional information is private to the FPU emulator for now. * See arch/mips/include/asm/fpu_emulator.h. */
struct mips_fpu_struct { union fpureg fpr[NUM_FPU_REGS]; unsigned int fcr31; unsigned int msacsr;};
#define NUM_DSP_REGS 6
typedef unsigned long dspreg_t;
struct mips_dsp_state { dspreg_t dspr[NUM_DSP_REGS]; unsigned int dspcontrol;};
#define INIT_CPUMASK { \ {0,} \}
struct mips3264_watch_reg_state { /* The width of watchlo is 32 in a 32 bit kernel and 64 in a 64 bit kernel. We use unsigned long as it has the same property. */ unsigned long watchlo[NUM_WATCH_REGS]; /* Only the mask and IRW bits from watchhi. */ u16 watchhi[NUM_WATCH_REGS];};
union mips_watch_reg_state { struct mips3264_watch_reg_state mips3264;};
#if defined(CONFIG_CPU_CAVIUM_OCTEON)
struct octeon_cop2_state { /* DMFC2 rt, 0x0201 */ unsigned long cop2_crc_iv; /* DMFC2 rt, 0x0202 (Set with DMTC2 rt, 0x1202) */ unsigned long cop2_crc_length; /* DMFC2 rt, 0x0200 (set with DMTC2 rt, 0x4200) */ unsigned long cop2_crc_poly; /* DMFC2 rt, 0x0402; DMFC2 rt, 0x040A */ unsigned long cop2_llm_dat[2]; /* DMFC2 rt, 0x0084 */ unsigned long cop2_3des_iv; /* DMFC2 rt, 0x0080; DMFC2 rt, 0x0081; DMFC2 rt, 0x0082 */ unsigned long cop2_3des_key[3]; /* DMFC2 rt, 0x0088 (Set with DMTC2 rt, 0x0098) */ unsigned long cop2_3des_result; /* DMFC2 rt, 0x0111 (FIXME: Read Pass1 Errata) */ unsigned long cop2_aes_inp0; /* DMFC2 rt, 0x0102; DMFC2 rt, 0x0103 */ unsigned long cop2_aes_iv[2]; /* DMFC2 rt, 0x0104; DMFC2 rt, 0x0105; DMFC2 rt, 0x0106; DMFC2 * rt, 0x0107 */ unsigned long cop2_aes_key[4]; /* DMFC2 rt, 0x0110 */ unsigned long cop2_aes_keylen; /* DMFC2 rt, 0x0100; DMFC2 rt, 0x0101 */ unsigned long cop2_aes_result[2]; /* DMFC2 rt, 0x0240; DMFC2 rt, 0x0241; DMFC2 rt, 0x0242; DMFC2 * rt, 0x0243; DMFC2 rt, 0x0244; DMFC2 rt, 0x0245; DMFC2 rt, * 0x0246; DMFC2 rt, 0x0247; DMFC2 rt, 0x0248; DMFC2 rt, * 0x0249; DMFC2 rt, 0x024A; DMFC2 rt, 0x024B; DMFC2 rt, * 0x024C; DMFC2 rt, 0x024D; DMFC2 rt, 0x024E - Pass2 */ unsigned long cop2_hsh_datw[15]; /* DMFC2 rt, 0x0250; DMFC2 rt, 0x0251; DMFC2 rt, 0x0252; DMFC2 * rt, 0x0253; DMFC2 rt, 0x0254; DMFC2 rt, 0x0255; DMFC2 rt, * 0x0256; DMFC2 rt, 0x0257 - Pass2 */ unsigned long cop2_hsh_ivw[8]; /* DMFC2 rt, 0x0258; DMFC2 rt, 0x0259 - Pass2 */ unsigned long cop2_gfm_mult[2]; /* DMFC2 rt, 0x025E - Pass2 */ unsigned long cop2_gfm_poly; /* DMFC2 rt, 0x025A; DMFC2 rt, 0x025B - Pass2 */ unsigned long cop2_gfm_result[2]; /* DMFC2 rt, 0x24F, DMFC2 rt, 0x50, OCTEON III */ unsigned long cop2_sha3[2];};#define COP2_INIT \ .cp2 = {0,},
#if defined(CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE) && \ CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0struct octeon_cvmseg_state { unsigned long cvmseg[CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE] [cpu_dcache_line_size() / sizeof(unsigned long)];};#endif#else#define COP2_INIT#endif
#ifdef CONFIG_CPU_HAS_MSA# define ARCH_MIN_TASKALIGN 16# define FPU_ALIGN __aligned(16)#else# define ARCH_MIN_TASKALIGN 8# define FPU_ALIGN#endif
struct mips_abi;
/* * If you change thread_struct remember to change the #defines below too! */struct thread_struct { /* Saved main processor registers. */ unsigned long reg16; unsigned long reg17, reg18, reg19, reg20, reg21, reg22, reg23; unsigned long reg29, reg30, reg31;
/* Saved cp0 stuff. */ unsigned long cp0_status;
#ifdef CONFIG_MIPS_FP_SUPPORT /* Saved fpu/fpu emulator stuff. */ struct mips_fpu_struct fpu FPU_ALIGN; /* Assigned branch delay slot 'emulation' frame */ atomic_t bd_emu_frame; /* PC of the branch from a branch delay slot 'emulation' */ unsigned long bd_emu_branch_pc; /* PC to continue from following a branch delay slot 'emulation' */ unsigned long bd_emu_cont_pc;#endif#ifdef CONFIG_MIPS_MT_FPAFF /* Emulated instruction count */ unsigned long emulated_fp; /* Saved per-thread scheduler affinity mask */ cpumask_t user_cpus_allowed;#endif /* CONFIG_MIPS_MT_FPAFF */
/* Saved state of the DSP ASE, if available. */ struct mips_dsp_state dsp;
/* Saved watch register state, if available. */ union mips_watch_reg_state watch;
/* Other stuff associated with the thread. */ unsigned long cp0_badvaddr; /* Last user fault */ unsigned long cp0_baduaddr; /* Last kernel fault accessing USEG */ unsigned long error_code; unsigned long trap_nr;#ifdef CONFIG_CPU_CAVIUM_OCTEON struct octeon_cop2_state cp2 __attribute__ ((__aligned__(128)));#if defined(CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE) && \ CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0 struct octeon_cvmseg_state cvmseg __attribute__ ((__aligned__(128)));#endif#endif struct mips_abi *abi;};
#ifdef CONFIG_MIPS_MT_FPAFF#define FPAFF_INIT \ .emulated_fp = 0, \ .user_cpus_allowed = INIT_CPUMASK,#else#define FPAFF_INIT#endif /* CONFIG_MIPS_MT_FPAFF */
#ifdef CONFIG_MIPS_FP_SUPPORT# define FPU_INIT \ .fpu = { \ .fpr = {{{0,},},}, \ .fcr31 = 0, \ .msacsr = 0, \ }, \ /* Delay slot emulation */ \ .bd_emu_frame = ATOMIC_INIT(BD_EMUFRAME_NONE), \ .bd_emu_branch_pc = 0, \ .bd_emu_cont_pc = 0,#else# define FPU_INIT#endif
#define INIT_THREAD { \ /* \ * Saved main processor registers \ */ \ .reg16 = 0, \ .reg17 = 0, \ .reg18 = 0, \ .reg19 = 0, \ .reg20 = 0, \ .reg21 = 0, \ .reg22 = 0, \ .reg23 = 0, \ .reg29 = 0, \ .reg30 = 0, \ .reg31 = 0, \ /* \ * Saved cp0 stuff \ */ \ .cp0_status = 0, \ /* \ * Saved FPU/FPU emulator stuff \ */ \ FPU_INIT \ /* \ * FPU affinity state (null if not FPAFF) \ */ \ FPAFF_INIT \ /* \ * Saved DSP stuff \ */ \ .dsp = { \ .dspr = {0, }, \ .dspcontrol = 0, \ }, \ /* \ * saved watch register stuff \ */ \ .watch = {{{0,},},}, \ /* \ * Other stuff associated with the process \ */ \ .cp0_badvaddr = 0, \ .cp0_baduaddr = 0, \ .error_code = 0, \ .trap_nr = 0, \ /* \ * Platform specific cop2 registers(null if no COP2) \ */ \ COP2_INIT \}
struct task_struct;
/* * Do necessary setup to start up a newly executed thread. */extern void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp);
static inline void flush_thread(void){}
unsigned long __get_wchan(struct task_struct *p);
#define __KSTK_TOS(tsk) ((unsigned long)task_stack_page(tsk) + \ THREAD_SIZE - 32 - sizeof(struct pt_regs))#define task_pt_regs(tsk) ((struct pt_regs *)__KSTK_TOS(tsk))#define KSTK_EIP(tsk) (task_pt_regs(tsk)->cp0_epc)#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29])#define KSTK_STATUS(tsk) (task_pt_regs(tsk)->cp0_status)
/* * Return_address is a replacement for __builtin_return_address(count) * which on certain architectures cannot reasonably be implemented in GCC * (MIPS, Alpha) or is unusable with -fomit-frame-pointer (i386). * Note that __builtin_return_address(x>=1) is forbidden because GCC * aborts compilation on some CPUs. It's simply not possible to unwind * some CPU's stackframes. * * __builtin_return_address works only for non-leaf functions. We avoid the * overhead of a function call by forcing the compiler to save the return * address register on the stack. */#define return_address() ({__asm__ __volatile__("":::"$31");__builtin_return_address(0);})
#ifdef CONFIG_CPU_HAS_PREFETCH
#define ARCH_HAS_PREFETCH#define prefetch(x) __builtin_prefetch((x), 0, 1)
#define ARCH_HAS_PREFETCHW#define prefetchw(x) __builtin_prefetch((x), 1, 1)
#endif
/* * Functions & macros implementing the PR_GET_FP_MODE & PR_SET_FP_MODE options * to the prctl syscall. */extern int mips_get_process_fp_mode(struct task_struct *task);extern int mips_set_process_fp_mode(struct task_struct *task, unsigned int value);
#define GET_FP_MODE(task) mips_get_process_fp_mode(task)#define SET_FP_MODE(task,value) mips_set_process_fp_mode(task, value)
void show_registers(struct pt_regs *regs);
#endif /* _ASM_PROCESSOR_H */