From: Heiko Carstens Date: Wed, 1 Jan 2014 15:08:06 +0000 (+0100) Subject: s390/ptrace: add struct psw and accessor function X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1365632bdeb42e5e252566bb08c0d7d68640edd3;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git s390/ptrace: add struct psw and accessor function Introduce a 'struct psw' which makes it easier to decode and test if certain bits in a psw are set or are not set. In addition also add a 'psw_bits()' helper define which allows to directly modify and test a psw_t structure. E.g. psw_t psw; psw_bits(psw).t = 1; /* set dat bit */ Signed-off-by: Heiko Carstens Reviewed-by: Thomas Huth Reviewed-by: Cornelia Huck Signed-off-by: Christian Borntraeger --- diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h index f4783c0b7b43..6e7708f3d866 100644 --- a/arch/s390/include/asm/ptrace.h +++ b/arch/s390/include/asm/ptrace.h @@ -16,6 +16,50 @@ PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_MCHECK | \ PSW_MASK_PSTATE | PSW_ASC_PRIMARY) +struct psw_bits { + unsigned long long : 1; + unsigned long long r : 1; /* PER-Mask */ + unsigned long long : 3; + unsigned long long t : 1; /* DAT Mode */ + unsigned long long i : 1; /* Input/Output Mask */ + unsigned long long e : 1; /* External Mask */ + unsigned long long key : 4; /* PSW Key */ + unsigned long long : 1; + unsigned long long m : 1; /* Machine-Check Mask */ + unsigned long long w : 1; /* Wait State */ + unsigned long long p : 1; /* Problem State */ + unsigned long long as : 2; /* Address Space Control */ + unsigned long long cc : 2; /* Condition Code */ + unsigned long long pm : 4; /* Program Mask */ + unsigned long long ri : 1; /* Runtime Instrumentation */ + unsigned long long : 6; + unsigned long long eaba : 2; /* Addressing Mode */ +#ifdef CONFIG_64BIT + unsigned long long : 31; + unsigned long long ia : 64;/* Instruction Address */ +#else + unsigned long long ia : 31;/* Instruction Address */ +#endif +}; + +enum { + PSW_AMODE_24BIT = 0, + PSW_AMODE_31BIT = 1, + PSW_AMODE_64BIT = 3 +}; + +enum { + PSW_AS_PRIMARY = 0, + PSW_AS_ACCREG = 1, + PSW_AS_SECONDARY = 2, + PSW_AS_HOME = 3 +}; + +#define psw_bits(__psw) (*({ \ + typecheck(psw_t, __psw); \ + &(*(struct psw_bits *)(&(__psw))); \ +})) + /* * The pt_regs struct defines the way the registers are stored on * the stack during a system call.