diff options
Diffstat (limited to 'arch/s390/include/asm/processor.h')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 48 |
1 files changed, 30 insertions, 18 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index a4b6229e5d4..5f33d37d032 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -33,6 +33,8 @@ static inline void get_cpu_id(struct cpuid *ptr) extern void s390_adjust_jiffies(void); extern int get_cpu_capability(unsigned int *); +extern const struct seq_operations cpuinfo_op; +extern int sysctl_ieee_emulation_warnings; /* * User space process size: 2GB for 31 bit, 4TB or 8PT for 64 bit. @@ -118,17 +120,17 @@ struct stack_frame { /* * Do necessary setup to start up a new thread. */ -#define start_thread(regs, new_psw, new_stackp) do { \ - regs->psw.mask = psw_user_bits; \ - regs->psw.addr = new_psw | PSW_ADDR_AMODE; \ - regs->gprs[15] = new_stackp; \ +#define start_thread(regs, new_psw, new_stackp) do { \ + regs->psw.mask = psw_user_bits | PSW_MASK_EA | PSW_MASK_BA; \ + regs->psw.addr = new_psw | PSW_ADDR_AMODE; \ + regs->gprs[15] = new_stackp; \ } while (0) -#define start_thread31(regs, new_psw, new_stackp) do { \ - regs->psw.mask = psw_user32_bits; \ - regs->psw.addr = new_psw | PSW_ADDR_AMODE; \ - regs->gprs[15] = new_stackp; \ - crst_table_downgrade(current->mm, 1UL << 31); \ +#define start_thread31(regs, new_psw, new_stackp) do { \ + regs->psw.mask = psw_user_bits | PSW_MASK_BA; \ + regs->psw.addr = new_psw | PSW_ADDR_AMODE; \ + regs->gprs[15] = new_stackp; \ + crst_table_downgrade(current->mm, 1UL << 31); \ } while (0) /* Forward declaration, a strange C thing */ @@ -187,7 +189,6 @@ static inline void __load_psw(psw_t psw) * Set PSW mask to specified value, while leaving the * PSW addr pointing to the next instruction. */ - static inline void __load_psw_mask (unsigned long mask) { unsigned long addr; @@ -212,26 +213,37 @@ static inline void __load_psw_mask (unsigned long mask) : "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc"); #endif /* __s390x__ */ } - + /* - * Function to stop a processor until an interruption occurred + * Rewind PSW instruction address by specified number of bytes. */ -static inline void enabled_wait(void) +static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc) { - __load_psw_mask(PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT | - PSW_MASK_MCHECK | PSW_MASK_WAIT | PSW_DEFAULT_KEY); -} +#ifndef __s390x__ + if (psw.addr & PSW_ADDR_AMODE) + /* 31 bit mode */ + return (psw.addr - ilc) | PSW_ADDR_AMODE; + /* 24 bit mode */ + return (psw.addr - ilc) & ((1UL << 24) - 1); +#else + unsigned long mask; + mask = (psw.mask & PSW_MASK_EA) ? -1UL : + (psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 : + (1UL << 24) - 1; + return (psw.addr - ilc) & mask; +#endif +} + /* * Function to drop a processor into disabled wait state */ - static inline void ATTRIB_NORET disabled_wait(unsigned long code) { unsigned long ctl_buf; psw_t dw_psw; - dw_psw.mask = PSW_BASE_BITS | PSW_MASK_WAIT; + dw_psw.mask = PSW_MASK_BASE | PSW_MASK_WAIT | PSW_MASK_BA | PSW_MASK_EA; dw_psw.addr = code; /* * Store status and then load disabled wait psw, |