9989f41fd3
- add arm64 dependent codes with GICv3 and SVE support - fix bugs based on architecture separation requests
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/* thread_info.h COPYRIGHT FUJITSU LIMITED 2015-2017 */
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#ifndef __HEADER_ARM64_COMMON_THREAD_INFO_H
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#define __HEADER_ARM64_COMMON_THREAD_INFO_H
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#define KERNEL_STACK_SIZE 32768 /* 8 page */
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#define THREAD_START_SP KERNEL_STACK_SIZE - 16
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#ifndef __ASSEMBLY__
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#define ALIGN_UP(x, align) ALIGN_DOWN((x) + (align) - 1, align)
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#define ALIGN_DOWN(x, align) ((x) & ~((align) - 1))
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#include <process.h>
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#include <prctl.h>
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struct cpu_context {
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unsigned long x19;
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unsigned long x20;
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unsigned long x21;
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unsigned long x22;
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unsigned long x23;
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unsigned long x24;
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unsigned long x25;
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unsigned long x26;
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unsigned long x27;
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unsigned long x28;
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unsigned long fp;
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unsigned long sp;
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unsigned long pc;
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};
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struct thread_info {
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unsigned long flags; /* low level flags */
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// mm_segment_t addr_limit; /* address limit */
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// struct task_struct *task; /* main task structure */
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// struct exec_domain *exec_domain; /* execution domain */
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// struct restart_block restart_block;
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// int preempt_count; /* 0 => preemptable, <0 => bug */
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int cpu; /* cpu */
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struct cpu_context cpu_context; /* kernel_context */
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void *sve_state; /* SVE registers, if any */
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uint16_t sve_vl; /* SVE vector length */
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uint16_t sve_vl_onexec; /* SVE vl after next exec */
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uint16_t sve_flags; /* SVE related flags */
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unsigned long fault_address; /* fault info */
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unsigned long fault_code; /* ESR_EL1 value */
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};
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/* Flags for sve_flags (intentionally defined to match the prctl flags) */
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/* Inherit sve_vl and sve_flags across execve(): */
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#define THREAD_VL_INHERIT PR_SVE_SET_VL_INHERIT
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struct arm64_cpu_local_thread {
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struct thread_info thread_info;
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unsigned long paniced; /* 136 */
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uint64_t panic_regs[34]; /* 144 */
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};
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union arm64_cpu_local_variables {
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struct arm64_cpu_local_thread arm64_cpu_local_thread;
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unsigned long stack[KERNEL_STACK_SIZE / sizeof(unsigned long)];
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};
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extern union arm64_cpu_local_variables init_thread_info;
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/*
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* how to get the current stack pointer from C
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*/
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register unsigned long current_stack_pointer asm ("sp");
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/*
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* how to get the thread information struct from C
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*/
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static inline struct thread_info *current_thread_info(void)
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{
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unsigned long ti = 0;
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ti = ALIGN_DOWN(current_stack_pointer, KERNEL_STACK_SIZE);
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return (struct thread_info *)ti;
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}
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/*
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* how to get the pt_regs struct from C
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*/
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static inline struct pt_regs *current_pt_regs(void)
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{
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unsigned long regs = 0;
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regs = ALIGN_DOWN(current_stack_pointer, KERNEL_STACK_SIZE);
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regs += THREAD_START_SP - sizeof(struct pt_regs);
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return (struct pt_regs *)regs;
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}
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#endif /* !__ASSEMBLY__ */
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#define TIF_SINGLESTEP 21
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#endif /* !__HEADER_ARM64_COMMON_THREAD_INFO_H */
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