diff options
Diffstat (limited to 'arch/s390/kernel/head.S')
| -rw-r--r-- | arch/s390/kernel/head.S | 67 |
1 files changed, 48 insertions, 19 deletions
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S index 22596d70fc2e..ec6882348520 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> @@ -64,7 +62,7 @@ __HEAD .org 0x100 # # subroutine for loading from tape -# Paramters: +# Parameters: # R1 = device number # R2 = load address .Lloader: @@ -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) |