patch-2.4.2 linux/include/asm-s390/processor.h

• Lines: 76
• Date: Tue Feb 13 14:13:44 2001
• Orig file: v2.4.1/linux/include/asm-s390/processor.h
• Orig date: Sat Dec 30 09:35:41 2000

diff -u --recursive --new-file v2.4.1/linux/include/asm-s390/processor.h linux/include/asm-s390/processor.h
@@ -41,7 +41,7 @@
         cpuid_t  cpu_id;
         __u16    cpu_addr;
         __u16    cpu_nr;
-        unsigned long loops_per_sec;
+        unsigned long loops_per_jiffy;
         unsigned long *pgd_quick;
         unsigned long *pte_quick;
         unsigned long pgtable_cache_sz;
@@ -87,13 +87,15 @@
         /* perform syscall argument validation (get/set_fs) */
         mm_segment_t fs;
         per_struct per_info;/* Must be aligned on an 4 byte boundary*/
+	addr_t  ieee_instruction_pointer; 
+	/* Used to give failing instruction back to user for ieee exceptions */
 };
 
 typedef struct thread_struct thread_struct;
 
 #define INIT_MMAP \
 { &init_mm, 0, 0, NULL, PAGE_SHARED, \
-VM_READ | VM_WRITE | VM_EXEC, 1, NULL, &init_mm.mmap }
+VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
 
 #define INIT_THREAD { (struct pt_regs *) 0,                       \
                     { 0,{{0},{0},{0},{0},{0},{0},{0},{0},{0},{0}, \
@@ -108,12 +110,8 @@
 
 /* need to define ... */
 #define start_thread(regs, new_psw, new_stackp) do {            \
-        unsigned long *u_stack = new_stackp;                    \
         regs->psw.mask  = _USER_PSW_MASK;                       \
-        regs->psw.addr  = new_psw | 0x80000000 ;                \
-        get_user(regs->gprs[2],u_stack);                        \
-        get_user(regs->gprs[3],u_stack+1);                      \
-        get_user(regs->gprs[4],u_stack+2);                      \
+        regs->psw.addr  = new_psw | 0x80000000;                 \
         regs->gprs[15]  = new_stackp ;                          \
 } while (0)
 
@@ -172,13 +170,33 @@
 static inline void disabled_wait(unsigned long code)
 {
         char psw_buffer[2*sizeof(psw_t)];
+        char ctl_buf[4];
         psw_t *dw_psw = (psw_t *)(((unsigned long) &psw_buffer+sizeof(psw_t)-1)
                                   & -sizeof(psw_t));
 
         dw_psw->mask = 0x000a0000;
         dw_psw->addr = code;
-        /* load disabled wait psw, the processor is dead afterwards */
-        asm volatile ("lpsw 0(%0)" : : "a" (dw_psw));
+        /* 
+         * Store status and then load disabled wait psw,
+         * the processor is dead afterwards
+         */
+
+        asm volatile ("    stctl 0,0,0(%1)\n"
+                      "    ni    0(%1),0xef\n" /* switch off protection */
+                      "    lctl  0,0,0(%1)\n"
+                      "    stpt  0xd8\n"       /* store timer */
+                      "    stckc 0xe0\n"       /* store clock comparator */
+                      "    stpx  0x108\n"      /* store prefix register */
+                      "    stam  0,15,0x120\n" /* store access registers */
+                      "    std   0,0x160\n"    /* store f0 */
+                      "    std   2,0x168\n"    /* store f2 */
+                      "    std   4,0x170\n"    /* store f4 */
+                      "    std   6,0x178\n"    /* store f6 */
+                      "    stm   0,15,0x180\n" /* store general registers */
+                      "    stctl 0,15,0x1c0\n" /* store control registers */
+                      "    oi    0(%1),0x10\n" /* fake protection bit */
+                      "    lpsw 0(%0)"
+                      : : "a" (dw_psw), "a" (&ctl_buf));
 }
 
 #endif                                 /* __ASM_S390_PROCESSOR_H           */