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-rw-r--r--arch/s390/kernel/head.S65
1 files changed, 47 insertions, 18 deletions
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index 22596d70fc2..6d227413cbe 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -1,7 +1,5 @@
/*
- * arch/s390/kernel/head.S
- *
- * Copyright (C) IBM Corp. 1999,2006
+ * Copyright IBM Corp. 1999,2009
*
* Author(s): Hartmut Penner <hp@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
@@ -479,27 +477,58 @@ startup:basr %r13,0 # get base
mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
mvc __LC_EXIT_TIMER(8),5f-.LPG0(%r13)
#ifndef CONFIG_MARCH_G5
- # check processor version against MARCH_{G5,Z900,Z990,Z9_109,Z10}
- stidp __LC_CPUID # store cpuid
- lhi %r0,(3f-2f) / 2
- la %r1,2f-.LPG0(%r13)
-0: clc __LC_CPUID+4(2),0(%r1)
- jne 3f
- lpsw 1f-.LPG0(13) # machine type not good enough, crash
+ # check capabilities against MARCH_{G5,Z900,Z990,Z9_109,Z10}
+ xc __LC_STFL_FAC_LIST(8),__LC_STFL_FAC_LIST
+ stfl __LC_STFL_FAC_LIST # store facility list
+ tm __LC_STFL_FAC_LIST,0x01 # stfle available ?
+ jz 0f
+ la %r0,0
+ .insn s,0xb2b00000,__LC_STFL_FAC_LIST # store facility list extended
+0: l %r0,__LC_STFL_FAC_LIST
+ n %r0,2f+8-.LPG0(%r13)
+ cl %r0,2f+8-.LPG0(%r13)
+ jne 1f
+ l %r0,__LC_STFL_FAC_LIST+4
+ n %r0,2f+12-.LPG0(%r13)
+ cl %r0,2f+12-.LPG0(%r13)
+ je 3f
+1: l %r15,.Lstack-.LPG0(%r13)
+ ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE
+ ahi %r15,-96
+ la %r2,.Lals_string-.LPG0(%r13)
+ l %r3,.Lsclp_print-.LPG0(%r13)
+ basr %r14,%r3
+ lpsw 2f-.LPG0(%r13) # machine type not good enough, crash
+.Lals_string:
+ .asciz "The Linux kernel requires more recent processor hardware"
+.Lsclp_print:
+ .long _sclp_print_early
+.Lstack:
+ .long init_thread_union
.align 16
-1: .long 0x000a0000,0x00000000
-2:
+2: .long 0x000a0000,0x8badcccc
+#if defined(CONFIG_64BIT)
#if defined(CONFIG_MARCH_Z10)
- .short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086, 0x2094, 0x2096
+ .long 0xc100efe3, 0xf0680000
#elif defined(CONFIG_MARCH_Z9_109)
- .short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086
+ .long 0xc100efc3, 0x00000000
#elif defined(CONFIG_MARCH_Z990)
- .short 0x9672, 0x2064, 0x2066
+ .long 0xc0002000, 0x00000000
#elif defined(CONFIG_MARCH_Z900)
- .short 0x9672
+ .long 0xc0000000, 0x00000000
+#endif
+#else
+#if defined(CONFIG_MARCH_Z10)
+ .long 0x8100c880, 0x00000000
+#elif defined(CONFIG_MARCH_Z9_109)
+ .long 0x8100c880, 0x00000000
+#elif defined(CONFIG_MARCH_Z990)
+ .long 0x80002000, 0x00000000
+#elif defined(CONFIG_MARCH_Z900)
+ .long 0x80000000, 0x00000000
+#endif
#endif
-3: la %r1,2(%r1)
- brct %r0,0b
+3:
#endif
l %r13,4f-.LPG0(%r13)