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[S390] Convert memory detection into C code.
Hopefully this will make it more maintainable and less error prone. Code makes use of search_exception_tables(). Since it calls this function before the kernel exeception table is sorted, there is an early call to sort_main_extable(). This way it's easy to use the already present infrastructure of fixup sections. Also this would allows to easily convert the rest of head[31|64].S into C code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
Martin Schwidefsky
parent
31ee4b2f40
commit
ab14de6c37
@ -433,7 +433,6 @@ CONFIG_TN3270_CONSOLE=y
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CONFIG_TN3215=y
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CONFIG_TN3215_CONSOLE=y
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CONFIG_CCW_CONSOLE=y
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CONFIG_SCLP=y
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CONFIG_SCLP_TTY=y
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CONFIG_SCLP_CONSOLE=y
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CONFIG_SCLP_VT220_TTY=y
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@ -4,7 +4,7 @@
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EXTRA_AFLAGS := -traditional
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obj-y := bitmap.o traps.o time.o process.o reset.o \
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obj-y := bitmap.o traps.o time.o process.o base.o early.o \
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setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
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semaphore.o s390_ext.o debug.o irq.o ipl.o
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150
arch/s390/kernel/base.S
Normal file
150
arch/s390/kernel/base.S
Normal file
@ -0,0 +1,150 @@
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/*
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* arch/s390/kernel/base.S
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*
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* Copyright IBM Corp. 2006,2007
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
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* Michael Holzheu <holzheu@de.ibm.com>
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*/
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#include <asm/ptrace.h>
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#include <asm/lowcore.h>
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#ifdef CONFIG_64BIT
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.globl s390_base_mcck_handler
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s390_base_mcck_handler:
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basr %r13,0
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0: lg %r15,__LC_PANIC_STACK # load panic stack
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aghi %r15,-STACK_FRAME_OVERHEAD
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larl %r1,s390_base_mcck_handler_fn
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lg %r1,0(%r1)
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ltgr %r1,%r1
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jz 1f
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basr %r14,%r1
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1: la %r1,4095
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lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
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lpswe __LC_MCK_OLD_PSW
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.section .bss
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.globl s390_base_mcck_handler_fn
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s390_base_mcck_handler_fn:
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.quad 0
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.previous
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.globl s390_base_ext_handler
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s390_base_ext_handler:
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stmg %r0,%r15,__LC_SAVE_AREA
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basr %r13,0
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0: aghi %r15,-STACK_FRAME_OVERHEAD
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larl %r1,s390_base_ext_handler_fn
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lg %r1,0(%r1)
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ltgr %r1,%r1
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jz 1f
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basr %r14,%r1
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1: lmg %r0,%r15,__LC_SAVE_AREA
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ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
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lpswe __LC_EXT_OLD_PSW
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.section .bss
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.globl s390_base_ext_handler_fn
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s390_base_ext_handler_fn:
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.quad 0
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.previous
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.globl s390_base_pgm_handler
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s390_base_pgm_handler:
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stmg %r0,%r15,__LC_SAVE_AREA
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basr %r13,0
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0: aghi %r15,-STACK_FRAME_OVERHEAD
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larl %r1,s390_base_pgm_handler_fn
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lg %r1,0(%r1)
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ltgr %r1,%r1
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jz 1f
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basr %r14,%r1
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lmg %r0,%r15,__LC_SAVE_AREA
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lpswe __LC_PGM_OLD_PSW
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1: lpswe disabled_wait_psw-0b(%r13)
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.align 8
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disabled_wait_psw:
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.quad 0x0002000180000000,0x0000000000000000 + s390_base_pgm_handler
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.section .bss
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.globl s390_base_pgm_handler_fn
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s390_base_pgm_handler_fn:
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.quad 0
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.previous
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#else /* CONFIG_64BIT */
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.globl s390_base_mcck_handler
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s390_base_mcck_handler:
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basr %r13,0
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0: l %r15,__LC_PANIC_STACK # load panic stack
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ahi %r15,-STACK_FRAME_OVERHEAD
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l %r1,2f-0b(%r13)
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l %r1,0(%r1)
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ltr %r1,%r1
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jz 1f
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basr %r14,%r1
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1: lm %r0,%r15,__LC_GPREGS_SAVE_AREA
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lpsw __LC_MCK_OLD_PSW
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2: .long s390_base_mcck_handler_fn
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.section .bss
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.globl s390_base_mcck_handler_fn
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s390_base_mcck_handler_fn:
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.long 0
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.previous
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.globl s390_base_ext_handler
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s390_base_ext_handler:
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stm %r0,%r15,__LC_SAVE_AREA
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basr %r13,0
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0: ahi %r15,-STACK_FRAME_OVERHEAD
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l %r1,2f-0b(%r13)
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l %r1,0(%r1)
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ltr %r1,%r1
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jz 1f
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basr %r14,%r1
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1: lm %r0,%r15,__LC_SAVE_AREA
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ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit
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lpsw __LC_EXT_OLD_PSW
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2: .long s390_base_ext_handler_fn
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.section .bss
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.globl s390_base_ext_handler_fn
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s390_base_ext_handler_fn:
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.long 0
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.previous
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.globl s390_base_pgm_handler
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s390_base_pgm_handler:
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stm %r0,%r15,__LC_SAVE_AREA
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basr %r13,0
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0: ahi %r15,-STACK_FRAME_OVERHEAD
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l %r1,2f-0b(%r13)
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l %r1,0(%r1)
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ltr %r1,%r1
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jz 1f
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basr %r14,%r1
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lm %r0,%r15,__LC_SAVE_AREA
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lpsw __LC_PGM_OLD_PSW
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1: lpsw disabled_wait_psw-0b(%r13)
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2: .long s390_base_pgm_handler_fn
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disabled_wait_psw:
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.align 8
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.long 0x000a0000,0x00000000 + s390_base_pgm_handler
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.section .bss
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.globl s390_base_pgm_handler_fn
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s390_base_pgm_handler_fn:
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.long 0
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.previous
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#endif /* CONFIG_64BIT */
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307
arch/s390/kernel/early.c
Normal file
307
arch/s390/kernel/early.c
Normal file
@ -0,0 +1,307 @@
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/*
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* arch/s390/kernel/early.c
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*
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* Copyright IBM Corp. 2007
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* Author(s): Hongjie Yang <hongjie@us.ibm.com>,
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* Heiko Carstens <heiko.carstens@de.ibm.com>
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*/
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#include <linux/lockdep.h>
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#include <linux/module.h>
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#include <linux/pfn.h>
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#include <linux/uaccess.h>
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#include <asm/lowcore.h>
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#include <asm/processor.h>
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#include <asm/sections.h>
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#include <asm/setup.h>
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#include <asm/cpcmd.h>
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#include <asm/sclp.h>
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/*
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* Create a Kernel NSS if the SAVESYS= parameter is defined
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*/
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#define DEFSYS_CMD_SIZE 96
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#define SAVESYS_CMD_SIZE 32
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extern int _eshared;
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char kernel_nss_name[NSS_NAME_SIZE + 1];
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#ifdef CONFIG_SHARED_KERNEL
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static noinline __init void create_kernel_nss(void)
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{
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unsigned int i, stext_pfn, eshared_pfn, end_pfn, min_size;
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#ifdef CONFIG_BLK_DEV_INITRD
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unsigned int sinitrd_pfn, einitrd_pfn;
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#endif
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int response;
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char *savesys_ptr;
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char upper_command_line[COMMAND_LINE_SIZE];
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char defsys_cmd[DEFSYS_CMD_SIZE];
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char savesys_cmd[SAVESYS_CMD_SIZE];
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/* Do nothing if we are not running under VM */
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if (!MACHINE_IS_VM)
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return;
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/* Convert COMMAND_LINE to upper case */
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for (i = 0; i < strlen(COMMAND_LINE); i++)
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upper_command_line[i] = toupper(COMMAND_LINE[i]);
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savesys_ptr = strstr(upper_command_line, "SAVESYS=");
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if (!savesys_ptr)
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return;
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savesys_ptr += 8; /* Point to the beginning of the NSS name */
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for (i = 0; i < NSS_NAME_SIZE; i++) {
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if (savesys_ptr[i] == ' ' || savesys_ptr[i] == '\0')
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break;
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kernel_nss_name[i] = savesys_ptr[i];
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}
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stext_pfn = PFN_DOWN(__pa(&_stext));
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eshared_pfn = PFN_DOWN(__pa(&_eshared));
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end_pfn = PFN_UP(__pa(&_end));
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min_size = end_pfn << 2;
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sprintf(defsys_cmd, "DEFSYS %s 00000-%.5X EW %.5X-%.5X SR %.5X-%.5X",
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kernel_nss_name, stext_pfn - 1, stext_pfn, eshared_pfn - 1,
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eshared_pfn, end_pfn);
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#ifdef CONFIG_BLK_DEV_INITRD
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if (INITRD_START && INITRD_SIZE) {
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sinitrd_pfn = PFN_DOWN(__pa(INITRD_START));
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einitrd_pfn = PFN_UP(__pa(INITRD_START + INITRD_SIZE));
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min_size = einitrd_pfn << 2;
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sprintf(defsys_cmd, "%s EW %.5X-%.5X", defsys_cmd,
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sinitrd_pfn, einitrd_pfn);
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}
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#endif
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sprintf(defsys_cmd, "%s EW MINSIZE=%.7iK", defsys_cmd, min_size);
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sprintf(savesys_cmd, "SAVESYS %s \n IPL %s",
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kernel_nss_name, kernel_nss_name);
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__cpcmd(defsys_cmd, NULL, 0, &response);
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if (response != 0)
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return;
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__cpcmd(savesys_cmd, NULL, 0, &response);
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if (response != strlen(savesys_cmd))
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return;
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ipl_flags = IPL_NSS_VALID;
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}
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#else /* CONFIG_SHARED_KERNEL */
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static inline void create_kernel_nss(void) { }
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#endif /* CONFIG_SHARED_KERNEL */
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/*
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* Clear bss memory
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*/
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static noinline __init void clear_bss_section(void)
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{
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memset(__bss_start, 0, _end - __bss_start);
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}
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/*
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* Initialize storage key for kernel pages
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*/
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static noinline __init void init_kernel_storage_key(void)
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{
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unsigned long end_pfn, init_pfn;
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end_pfn = PFN_UP(__pa(&_end));
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for (init_pfn = 0 ; init_pfn < end_pfn; init_pfn++)
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page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
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}
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static noinline __init void detect_machine_type(void)
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{
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struct cpuinfo_S390 *cpuinfo = &S390_lowcore.cpu_data;
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asm volatile("stidp %0" : "=m" (S390_lowcore.cpu_data.cpu_id));
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/* Running under z/VM ? */
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if (cpuinfo->cpu_id.version == 0xff)
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machine_flags |= 1;
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/* Running on a P/390 ? */
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if (cpuinfo->cpu_id.machine == 0x7490)
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machine_flags |= 4;
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}
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static noinline __init int memory_fast_detect(void)
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{
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unsigned long val0 = 0;
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unsigned long val1 = 0xc;
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int ret = -ENOSYS;
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if (ipl_flags & IPL_NSS_VALID)
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return -ENOSYS;
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asm volatile(
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" diag %1,%2,0x260\n"
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"0: lhi %0,0\n"
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"1:\n"
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EX_TABLE(0b,1b)
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: "+d" (ret), "+d" (val0), "+d" (val1) : : "cc");
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if (ret || val0 != val1)
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return -ENOSYS;
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memory_chunk[0].size = val0;
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return 0;
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}
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#define ADDR2G (1UL << 31)
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static noinline __init unsigned long sclp_memory_detect(void)
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{
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struct sclp_readinfo_sccb *sccb;
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unsigned long long memsize;
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sccb = &s390_readinfo_sccb;
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if (sccb->header.response_code != 0x10)
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return 0;
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if (sccb->rnsize)
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memsize = sccb->rnsize << 20;
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else
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memsize = sccb->rnsize2 << 20;
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if (sccb->rnmax)
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memsize *= sccb->rnmax;
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else
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memsize *= sccb->rnmax2;
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#ifndef CONFIG_64BIT
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/*
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* Can't deal with more than 2G in 31 bit addressing mode, so
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* limit the value in order to avoid strange side effects.
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*/
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if (memsize > ADDR2G)
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memsize = ADDR2G;
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#endif
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return (unsigned long) memsize;
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}
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static inline __init unsigned long __tprot(unsigned long addr)
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{
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int cc = -1;
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asm volatile(
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" tprot 0(%1),0\n"
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"0: ipm %0\n"
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" srl %0,28\n"
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"1:\n"
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EX_TABLE(0b,1b)
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: "+d" (cc) : "a" (addr) : "cc");
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return (unsigned long)cc;
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}
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/* Checking memory in 128KB increments. */
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#define CHUNK_INCR (1UL << 17)
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static noinline __init void find_memory_chunks(unsigned long memsize)
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{
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unsigned long addr = 0, old_addr = 0;
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unsigned long old_cc = CHUNK_READ_WRITE;
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unsigned long cc;
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int chunk = 0;
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while (chunk < MEMORY_CHUNKS) {
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cc = __tprot(addr);
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while (cc == old_cc) {
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addr += CHUNK_INCR;
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cc = __tprot(addr);
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#ifndef CONFIG_64BIT
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if (addr == ADDR2G)
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break;
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#endif
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}
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if (old_addr != addr &&
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(old_cc == CHUNK_READ_WRITE || old_cc == CHUNK_READ_ONLY)) {
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memory_chunk[chunk].addr = old_addr;
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memory_chunk[chunk].size = addr - old_addr;
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memory_chunk[chunk].type = old_cc;
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chunk++;
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}
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old_addr = addr;
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old_cc = cc;
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#ifndef CONFIG_64BIT
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if (addr == ADDR2G)
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break;
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#endif
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/*
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* Finish memory detection at the first hole, unless
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* - we reached the hsa -> skip it.
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* - we know there must be more.
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*/
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if (cc == -1UL && !memsize && old_addr != ADDR2G)
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break;
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if (memsize && addr >= memsize)
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break;
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}
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}
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static __init void early_pgm_check_handler(void)
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{
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unsigned long addr;
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const struct exception_table_entry *fixup;
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addr = S390_lowcore.program_old_psw.addr;
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fixup = search_exception_tables(addr & PSW_ADDR_INSN);
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if (!fixup)
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disabled_wait(0);
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S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE;
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}
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static noinline __init void setup_lowcore_early(void)
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{
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psw_t psw;
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psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
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psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_ext_handler;
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S390_lowcore.external_new_psw = psw;
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psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
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S390_lowcore.program_new_psw = psw;
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s390_base_pgm_handler_fn = early_pgm_check_handler;
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}
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/*
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||||
* Save ipl parameters, clear bss memory, initialize storage keys
|
||||
* and create a kernel NSS at startup if the SAVESYS= parm is defined
|
||||
*/
|
||||
void __init startup_init(void)
|
||||
{
|
||||
unsigned long memsize;
|
||||
|
||||
ipl_save_parameters();
|
||||
clear_bss_section();
|
||||
init_kernel_storage_key();
|
||||
lockdep_init();
|
||||
lockdep_off();
|
||||
detect_machine_type();
|
||||
create_kernel_nss();
|
||||
sort_main_extable();
|
||||
setup_lowcore_early();
|
||||
sclp_readinfo_early();
|
||||
memsize = sclp_memory_detect();
|
||||
if (memory_fast_detect() < 0)
|
||||
find_memory_chunks(memsize);
|
||||
lockdep_on();
|
||||
}
|
||||
@ -58,145 +58,6 @@ startup_continue:
|
||||
l %r14,.Lstartup_init-.LPG1(%r13)
|
||||
basr %r14,%r14
|
||||
|
||||
l %r2,.Lrcp-.LPG1(%r13) # Read SCP forced command word
|
||||
.Lservicecall:
|
||||
stosm .Lpmask-.LPG1(%r13),0x01 # authorize ext interrupts
|
||||
|
||||
stctl %r0, %r0,.Lcr-.LPG1(%r13) # get cr0
|
||||
la %r1,0x200 # set bit 22
|
||||
o %r1,.Lcr-.LPG1(%r13) # or old cr0 with r1
|
||||
st %r1,.Lcr-.LPG1(%r13)
|
||||
lctl %r0, %r0,.Lcr-.LPG1(%r13) # load modified cr0
|
||||
|
||||
mvc __LC_EXT_NEW_PSW(8),.Lpcext-.LPG1(%r13) # set postcall psw
|
||||
la %r1, .Lsclph-.LPG1(%r13)
|
||||
a %r1,__LC_EXT_NEW_PSW+4 # set handler
|
||||
st %r1,__LC_EXT_NEW_PSW+4
|
||||
|
||||
l %r4,.Lsccbaddr-.LPG1(%r13) # %r4 is our index for sccb stuff
|
||||
lr %r1,%r4 # our sccb
|
||||
.insn rre,0xb2200000,%r2,%r1 # service call
|
||||
ipm %r1
|
||||
srl %r1,28 # get cc code
|
||||
xr %r3, %r3
|
||||
chi %r1,3
|
||||
be .Lfchunk-.LPG1(%r13) # leave
|
||||
chi %r1,2
|
||||
be .Lservicecall-.LPG1(%r13)
|
||||
lpsw .Lwaitsclp-.LPG1(%r13)
|
||||
.Lsclph:
|
||||
lh %r1,.Lsccbr-.Lsccb(%r4)
|
||||
chi %r1,0x10 # 0x0010 is the sucess code
|
||||
je .Lprocsccb # let's process the sccb
|
||||
chi %r1,0x1f0
|
||||
bne .Lfchunk-.LPG1(%r13) # unhandled error code
|
||||
c %r2, .Lrcp-.LPG1(%r13) # Did we try Read SCP forced
|
||||
bne .Lfchunk-.LPG1(%r13) # if no, give up
|
||||
l %r2, .Lrcp2-.LPG1(%r13) # try with Read SCP
|
||||
b .Lservicecall-.LPG1(%r13)
|
||||
.Lprocsccb:
|
||||
lhi %r1,0
|
||||
icm %r1,3,.Lscpincr1-.Lsccb(%r4) # use this one if != 0
|
||||
jnz .Lscnd
|
||||
lhi %r1,0x800 # otherwise report 2GB
|
||||
.Lscnd:
|
||||
lhi %r3,0x800 # limit reported memory size to 2GB
|
||||
cr %r1,%r3
|
||||
jl .Lno2gb
|
||||
lr %r1,%r3
|
||||
.Lno2gb:
|
||||
xr %r3,%r3 # same logic
|
||||
ic %r3,.Lscpa1-.Lsccb(%r4)
|
||||
chi %r3,0x00
|
||||
jne .Lcompmem
|
||||
l %r3,.Lscpa2-.Lsccb(%r4)
|
||||
.Lcompmem:
|
||||
mr %r2,%r1 # mem in MB on 128-bit
|
||||
l %r1,.Lonemb-.LPG1(%r13)
|
||||
mr %r2,%r1 # mem size in bytes in %r3
|
||||
b .Lfchunk-.LPG1(%r13)
|
||||
|
||||
.align 4
|
||||
.Linittu:
|
||||
.long init_thread_union
|
||||
.Lstartup_init:
|
||||
.long startup_init
|
||||
.Lpmask:
|
||||
.byte 0
|
||||
.align 8
|
||||
.Lpcext:.long 0x00080000,0x80000000
|
||||
.Lcr:
|
||||
.long 0x00 # place holder for cr0
|
||||
.align 8
|
||||
.Lwaitsclp:
|
||||
.long 0x010a0000,0x80000000 + .Lsclph
|
||||
.Lrcp:
|
||||
.int 0x00120001 # Read SCP forced code
|
||||
.Lrcp2:
|
||||
.int 0x00020001 # Read SCP code
|
||||
.Lonemb:
|
||||
.int 0x100000
|
||||
.Lfchunk:
|
||||
|
||||
#
|
||||
# find memory chunks.
|
||||
#
|
||||
lr %r9,%r3 # end of mem
|
||||
mvc __LC_PGM_NEW_PSW(8),.Lpcmem-.LPG1(%r13)
|
||||
la %r1,1 # test in increments of 128KB
|
||||
sll %r1,17
|
||||
l %r3,.Lmchunk-.LPG1(%r13) # get pointer to memory_chunk array
|
||||
slr %r4,%r4 # set start of chunk to zero
|
||||
slr %r5,%r5 # set end of chunk to zero
|
||||
slr %r6,%r6 # set access code to zero
|
||||
la %r10,MEMORY_CHUNKS # number of chunks
|
||||
.Lloop:
|
||||
tprot 0(%r5),0 # test protection of first byte
|
||||
ipm %r7
|
||||
srl %r7,28
|
||||
clr %r6,%r7 # compare cc with last access code
|
||||
be .Lsame-.LPG1(%r13)
|
||||
lhi %r8,0 # no program checks
|
||||
b .Lsavchk-.LPG1(%r13)
|
||||
.Lsame:
|
||||
ar %r5,%r1 # add 128KB to end of chunk
|
||||
bno .Lloop-.LPG1(%r13) # r1 < 0x80000000 -> loop
|
||||
.Lchkmem: # > 2GB or tprot got a program check
|
||||
lhi %r8,1 # set program check flag
|
||||
.Lsavchk:
|
||||
clr %r4,%r5 # chunk size > 0?
|
||||
be .Lchkloop-.LPG1(%r13)
|
||||
st %r4,0(%r3) # store start address of chunk
|
||||
lr %r0,%r5
|
||||
slr %r0,%r4
|
||||
st %r0,4(%r3) # store size of chunk
|
||||
st %r6,8(%r3) # store type of chunk
|
||||
la %r3,12(%r3)
|
||||
ahi %r10,-1 # update chunk number
|
||||
.Lchkloop:
|
||||
lr %r6,%r7 # set access code to last cc
|
||||
# we got an exception or we're starting a new
|
||||
# chunk , we must check if we should
|
||||
# still try to find valid memory (if we detected
|
||||
# the amount of available storage), and if we
|
||||
# have chunks left
|
||||
xr %r0,%r0
|
||||
clr %r0,%r9 # did we detect memory?
|
||||
je .Ldonemem # if not, leave
|
||||
chi %r10,0 # do we have chunks left?
|
||||
je .Ldonemem
|
||||
chi %r8,1 # program check ?
|
||||
je .Lpgmchk
|
||||
lr %r4,%r5 # potential new chunk
|
||||
alr %r5,%r1 # add 128KB to end of chunk
|
||||
j .Llpcnt
|
||||
.Lpgmchk:
|
||||
alr %r5,%r1 # add 128KB to end of chunk
|
||||
lr %r4,%r5 # potential new chunk
|
||||
.Llpcnt:
|
||||
clr %r5,%r9 # should we go on?
|
||||
jl .Lloop
|
||||
.Ldonemem:
|
||||
l %r12,.Lmflags-.LPG1(%r13) # get address of machine_flags
|
||||
#
|
||||
# find out if we have an IEEE fpu
|
||||
@ -273,7 +134,6 @@ startup_continue:
|
||||
.long 0 # cr15: linkage stack operations
|
||||
.Lduct: .long 0,0,0,0,0,0,0,0
|
||||
.long 0,0,0,0,0,0,0,0
|
||||
.Lpcmem:.long 0x00080000,0x80000000 + .Lchkmem
|
||||
.Lpcfpu:.long 0x00080000,0x80000000 + .Lchkfpu
|
||||
.Lpccsp:.long 0x00080000,0x80000000 + .Lchkcsp
|
||||
.Lpcmvpg:.long 0x00080000,0x80000000 + .Lchkmvpg
|
||||
@ -284,7 +144,9 @@ startup_continue:
|
||||
.Lbss_bgn: .long __bss_start
|
||||
.Lbss_end: .long _end
|
||||
.Lparmaddr: .long PARMAREA
|
||||
.Lsccbaddr: .long .Lsccb
|
||||
.Linittu: .long init_thread_union
|
||||
.Lstartup_init:
|
||||
.long startup_init
|
||||
|
||||
.globl ipl_schib
|
||||
ipl_schib:
|
||||
@ -300,26 +162,6 @@ ipl_devno:
|
||||
.word 0
|
||||
|
||||
.org 0x12000
|
||||
.globl s390_readinfo_sccb
|
||||
s390_readinfo_sccb:
|
||||
.Lsccb:
|
||||
.hword 0x1000 # length, one page
|
||||
.byte 0x00,0x00,0x00
|
||||
.byte 0x80 # variable response bit set
|
||||
.Lsccbr:
|
||||
.hword 0x00 # response code
|
||||
.Lscpincr1:
|
||||
.hword 0x00
|
||||
.Lscpa1:
|
||||
.byte 0x00
|
||||
.fill 89,1,0
|
||||
.Lscpa2:
|
||||
.int 0x00
|
||||
.Lscpincr2:
|
||||
.quad 0x00
|
||||
.fill 3984,1,0
|
||||
.org 0x13000
|
||||
|
||||
#ifdef CONFIG_SHARED_KERNEL
|
||||
.org 0x100000
|
||||
#endif
|
||||
|
||||
@ -65,162 +65,6 @@ startup_continue:
|
||||
brasl %r14,startup_init
|
||||
# set program check new psw mask
|
||||
mvc __LC_PGM_NEW_PSW(8),.Lpcmsk-.LPG1(%r13)
|
||||
larl %r1,.Lslowmemdetect # set program check address
|
||||
stg %r1,__LC_PGM_NEW_PSW+8
|
||||
lghi %r1,0xc
|
||||
diag %r0,%r1,0x260 # get memory size of virtual machine
|
||||
cgr %r0,%r1 # different? -> old detection routine
|
||||
jne .Lslowmemdetect
|
||||
larl %r3,ipl_flags
|
||||
llgt %r3,0(%r3)
|
||||
chi %r3,4 # ipled from an kernel NSS
|
||||
je .Lslowmemdetect
|
||||
aghi %r1,1 # size is one more than end
|
||||
larl %r2,memory_chunk
|
||||
stg %r1,8(%r2) # store size of chunk
|
||||
|
||||
.Lslowmemdetect:
|
||||
l %r2,.Lrcp-.LPG1(%r13) # Read SCP forced command word
|
||||
.Lservicecall:
|
||||
stosm .Lpmask-.LPG1(%r13),0x01 # authorize ext interrupts
|
||||
|
||||
stctg %r0,%r0,.Lcr-.LPG1(%r13) # get cr0
|
||||
la %r1,0x200 # set bit 22
|
||||
og %r1,.Lcr-.LPG1(%r13) # or old cr0 with r1
|
||||
stg %r1,.Lcr-.LPG1(%r13)
|
||||
lctlg %r0,%r0,.Lcr-.LPG1(%r13) # load modified cr0
|
||||
|
||||
mvc __LC_EXT_NEW_PSW(8),.Lpcmsk-.LPG1(%r13) # set postcall psw
|
||||
larl %r1,.Lsclph
|
||||
stg %r1,__LC_EXT_NEW_PSW+8 # set handler
|
||||
|
||||
larl %r4,.Lsccb # %r4 is our index for sccb stuff
|
||||
lgr %r1,%r4 # our sccb
|
||||
.insn rre,0xb2200000,%r2,%r1 # service call
|
||||
ipm %r1
|
||||
srl %r1,28 # get cc code
|
||||
xr %r3,%r3
|
||||
chi %r1,3
|
||||
be .Lfchunk-.LPG1(%r13) # leave
|
||||
chi %r1,2
|
||||
be .Lservicecall-.LPG1(%r13)
|
||||
lpswe .Lwaitsclp-.LPG1(%r13)
|
||||
.Lsclph:
|
||||
lh %r1,.Lsccbr-.Lsccb(%r4)
|
||||
chi %r1,0x10 # 0x0010 is the sucess code
|
||||
je .Lprocsccb # let's process the sccb
|
||||
chi %r1,0x1f0
|
||||
bne .Lfchunk-.LPG1(%r13) # unhandled error code
|
||||
c %r2,.Lrcp-.LPG1(%r13) # Did we try Read SCP forced
|
||||
bne .Lfchunk-.LPG1(%r13) # if no, give up
|
||||
l %r2,.Lrcp2-.LPG1(%r13) # try with Read SCP
|
||||
b .Lservicecall-.LPG1(%r13)
|
||||
.Lprocsccb:
|
||||
lghi %r1,0
|
||||
icm %r1,3,.Lscpincr1-.Lsccb(%r4) # use this one if != 0
|
||||
jnz .Lscnd
|
||||
lg %r1,.Lscpincr2-.Lsccb(%r4) # otherwise use this one
|
||||
.Lscnd:
|
||||
xr %r3,%r3 # same logic
|
||||
ic %r3,.Lscpa1-.Lsccb(%r4)
|
||||
chi %r3,0x00
|
||||
jne .Lcompmem
|
||||
l %r3,.Lscpa2-.Lsccb(%r4)
|
||||
.Lcompmem:
|
||||
mlgr %r2,%r1 # mem in MB on 128-bit
|
||||
l %r1,.Lonemb-.LPG1(%r13)
|
||||
mlgr %r2,%r1 # mem size in bytes in %r3
|
||||
b .Lfchunk-.LPG1(%r13)
|
||||
|
||||
.align 4
|
||||
.Lpmask:
|
||||
.byte 0
|
||||
.align 8
|
||||
.Lcr:
|
||||
.quad 0x00 # place holder for cr0
|
||||
.Lwaitsclp:
|
||||
.quad 0x0102000180000000,.Lsclph
|
||||
.Lrcp:
|
||||
.int 0x00120001 # Read SCP forced code
|
||||
.Lrcp2:
|
||||
.int 0x00020001 # Read SCP code
|
||||
.Lonemb:
|
||||
.int 0x100000
|
||||
|
||||
.Lfchunk:
|
||||
|
||||
#
|
||||
# find memory chunks.
|
||||
#
|
||||
larl %r9,memory_chunk # skip tprot loop if diag260
|
||||
lg %r9,8(%r9) # memory detection was successful
|
||||
ltgr %r9,%r9
|
||||
jne .Ldonemem
|
||||
|
||||
lgr %r9,%r3 # end of mem
|
||||
larl %r1,.Lchkmem # set program check address
|
||||
stg %r1,__LC_PGM_NEW_PSW+8
|
||||
la %r1,1 # test in increments of 128KB
|
||||
sllg %r1,%r1,17
|
||||
larl %r3,memory_chunk
|
||||
slgr %r4,%r4 # set start of chunk to zero
|
||||
slgr %r5,%r5 # set end of chunk to zero
|
||||
slr %r6,%r6 # set access code to zero
|
||||
la %r10,MEMORY_CHUNKS # number of chunks
|
||||
.Lloop:
|
||||
tprot 0(%r5),0 # test protection of first byte
|
||||
ipm %r7
|
||||
srl %r7,28
|
||||
clr %r6,%r7 # compare cc with last access code
|
||||
je .Lsame
|
||||
lghi %r8,0 # no program checks
|
||||
j .Lsavchk
|
||||
.Lsame:
|
||||
algr %r5,%r1 # add 128KB to end of chunk
|
||||
# no need to check here,
|
||||
brc 12,.Lloop # this is the same chunk
|
||||
.Lchkmem: # > 16EB or tprot got a program check
|
||||
lghi %r8,1 # set program check flag
|
||||
.Lsavchk:
|
||||
clgr %r4,%r5 # chunk size > 0?
|
||||
je .Lchkloop
|
||||
stg %r4,0(%r3) # store start address of chunk
|
||||
lgr %r0,%r5
|
||||
slgr %r0,%r4
|
||||
stg %r0,8(%r3) # store size of chunk
|
||||
st %r6,20(%r3) # store type of chunk
|
||||
la %r3,24(%r3)
|
||||
ahi %r10,-1 # update chunk number
|
||||
.Lchkloop:
|
||||
lr %r6,%r7 # set access code to last cc
|
||||
# we got an exception or we're starting a new
|
||||
# chunk , we must check if we should
|
||||
# still try to find valid memory (if we detected
|
||||
# the amount of available storage), and if we
|
||||
# have chunks left
|
||||
lghi %r4,1
|
||||
sllg %r4,%r4,31
|
||||
clgr %r5,%r4
|
||||
je .Lhsaskip
|
||||
xr %r0, %r0
|
||||
clgr %r0, %r9 # did we detect memory?
|
||||
je .Ldonemem # if not, leave
|
||||
chi %r10, 0 # do we have chunks left?
|
||||
je .Ldonemem
|
||||
.Lhsaskip:
|
||||
chi %r8,1 # program check ?
|
||||
je .Lpgmchk
|
||||
lgr %r4,%r5 # potential new chunk
|
||||
algr %r5,%r1 # add 128KB to end of chunk
|
||||
j .Llpcnt
|
||||
.Lpgmchk:
|
||||
algr %r5,%r1 # add 128KB to end of chunk
|
||||
lgr %r4,%r5 # potential new chunk
|
||||
.Llpcnt:
|
||||
clgr %r5,%r9 # should we go on?
|
||||
jl .Lloop
|
||||
.Ldonemem:
|
||||
|
||||
larl %r12,machine_flags
|
||||
#
|
||||
# find out if we have the MVPG instruction
|
||||
@ -324,25 +168,6 @@ ipl_devno:
|
||||
.word 0
|
||||
|
||||
.org 0x12000
|
||||
.globl s390_readinfo_sccb
|
||||
s390_readinfo_sccb:
|
||||
.Lsccb:
|
||||
.hword 0x1000 # length, one page
|
||||
.byte 0x00,0x00,0x00
|
||||
.byte 0x80 # variable response bit set
|
||||
.Lsccbr:
|
||||
.hword 0x00 # response code
|
||||
.Lscpincr1:
|
||||
.hword 0x00
|
||||
.Lscpa1:
|
||||
.byte 0x00
|
||||
.fill 89,1,0
|
||||
.Lscpa2:
|
||||
.int 0x00
|
||||
.Lscpincr2:
|
||||
.quad 0x00
|
||||
.fill 3984,1,0
|
||||
.org 0x13000
|
||||
|
||||
#ifdef CONFIG_SHARED_KERNEL
|
||||
.org 0x100000
|
||||
|
||||
@ -20,14 +20,13 @@
|
||||
#include <asm/cio.h>
|
||||
#include <asm/ebcdic.h>
|
||||
#include <asm/reset.h>
|
||||
#include <asm/sclp.h>
|
||||
|
||||
#define IPL_PARM_BLOCK_VERSION 0
|
||||
#define LOADPARM_LEN 8
|
||||
|
||||
extern char s390_readinfo_sccb[];
|
||||
#define SCCB_VALID (*((__u16*)&s390_readinfo_sccb[6]) == 0x0010)
|
||||
#define SCCB_LOADPARM (&s390_readinfo_sccb[24])
|
||||
#define SCCB_FLAG (s390_readinfo_sccb[91])
|
||||
#define SCCB_VALID (s390_readinfo_sccb.header.response_code == 0x10)
|
||||
#define SCCB_LOADPARM (&s390_readinfo_sccb.loadparm)
|
||||
#define SCCB_FLAG (s390_readinfo_sccb.flags)
|
||||
|
||||
enum ipl_type {
|
||||
IPL_TYPE_NONE = 1,
|
||||
@ -1080,8 +1079,6 @@ static void do_reset_calls(void)
|
||||
reset->fn();
|
||||
}
|
||||
|
||||
extern void reset_mcck_handler(void);
|
||||
extern void reset_pgm_handler(void);
|
||||
extern __u32 dump_prefix_page;
|
||||
|
||||
void s390_reset_system(void)
|
||||
@ -1105,12 +1102,12 @@ void s390_reset_system(void)
|
||||
/* Set new machine check handler */
|
||||
S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
|
||||
S390_lowcore.mcck_new_psw.addr =
|
||||
PSW_ADDR_AMODE | (unsigned long) &reset_mcck_handler;
|
||||
PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
|
||||
|
||||
/* Set new program check handler */
|
||||
S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
|
||||
S390_lowcore.program_new_psw.addr =
|
||||
PSW_ADDR_AMODE | (unsigned long) &reset_pgm_handler;
|
||||
PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
|
||||
|
||||
do_reset_calls();
|
||||
}
|
||||
|
||||
@ -1,90 +0,0 @@
|
||||
/*
|
||||
* arch/s390/kernel/reset.S
|
||||
*
|
||||
* Copyright (C) IBM Corp. 2006
|
||||
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
|
||||
* Michael Holzheu <holzheu@de.ibm.com>
|
||||
*/
|
||||
|
||||
#include <asm/ptrace.h>
|
||||
#include <asm/lowcore.h>
|
||||
|
||||
#ifdef CONFIG_64BIT
|
||||
|
||||
.globl reset_mcck_handler
|
||||
reset_mcck_handler:
|
||||
basr %r13,0
|
||||
0: lg %r15,__LC_PANIC_STACK # load panic stack
|
||||
aghi %r15,-STACK_FRAME_OVERHEAD
|
||||
lg %r1,s390_reset_mcck_handler-0b(%r13)
|
||||
ltgr %r1,%r1
|
||||
jz 1f
|
||||
basr %r14,%r1
|
||||
1: la %r1,4095
|
||||
lmg %r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)
|
||||
lpswe __LC_MCK_OLD_PSW
|
||||
|
||||
.globl s390_reset_mcck_handler
|
||||
s390_reset_mcck_handler:
|
||||
.quad 0
|
||||
|
||||
.globl reset_pgm_handler
|
||||
reset_pgm_handler:
|
||||
stmg %r0,%r15,__LC_SAVE_AREA
|
||||
basr %r13,0
|
||||
0: lg %r15,__LC_PANIC_STACK # load panic stack
|
||||
aghi %r15,-STACK_FRAME_OVERHEAD
|
||||
lg %r1,s390_reset_pgm_handler-0b(%r13)
|
||||
ltgr %r1,%r1
|
||||
jz 1f
|
||||
basr %r14,%r1
|
||||
lmg %r0,%r15,__LC_SAVE_AREA
|
||||
lpswe __LC_PGM_OLD_PSW
|
||||
1: lpswe disabled_wait_psw-0b(%r13)
|
||||
.globl s390_reset_pgm_handler
|
||||
s390_reset_pgm_handler:
|
||||
.quad 0
|
||||
.align 8
|
||||
disabled_wait_psw:
|
||||
.quad 0x0002000180000000,0x0000000000000000 + reset_pgm_handler
|
||||
|
||||
#else /* CONFIG_64BIT */
|
||||
|
||||
.globl reset_mcck_handler
|
||||
reset_mcck_handler:
|
||||
basr %r13,0
|
||||
0: l %r15,__LC_PANIC_STACK # load panic stack
|
||||
ahi %r15,-STACK_FRAME_OVERHEAD
|
||||
l %r1,s390_reset_mcck_handler-0b(%r13)
|
||||
ltr %r1,%r1
|
||||
jz 1f
|
||||
basr %r14,%r1
|
||||
1: lm %r0,%r15,__LC_GPREGS_SAVE_AREA
|
||||
lpsw __LC_MCK_OLD_PSW
|
||||
|
||||
.globl s390_reset_mcck_handler
|
||||
s390_reset_mcck_handler:
|
||||
.long 0
|
||||
|
||||
.globl reset_pgm_handler
|
||||
reset_pgm_handler:
|
||||
stm %r0,%r15,__LC_SAVE_AREA
|
||||
basr %r13,0
|
||||
0: l %r15,__LC_PANIC_STACK # load panic stack
|
||||
ahi %r15,-STACK_FRAME_OVERHEAD
|
||||
l %r1,s390_reset_pgm_handler-0b(%r13)
|
||||
ltr %r1,%r1
|
||||
jz 1f
|
||||
basr %r14,%r1
|
||||
lm %r0,%r15,__LC_SAVE_AREA
|
||||
lpsw __LC_PGM_OLD_PSW
|
||||
|
||||
1: lpsw disabled_wait_psw-0b(%r13)
|
||||
.globl s390_reset_pgm_handler
|
||||
s390_reset_pgm_handler:
|
||||
.long 0
|
||||
disabled_wait_psw:
|
||||
.align 8
|
||||
.long 0x000a0000,0x00000000 + reset_pgm_handler
|
||||
|
||||
#endif /* CONFIG_64BIT */
|
||||
@ -284,140 +284,6 @@ static void __init conmode_default(void)
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Create a Kernel NSS if the SAVESYS= parameter is defined
|
||||
*/
|
||||
#define DEFSYS_CMD_SIZE 96
|
||||
#define SAVESYS_CMD_SIZE 32
|
||||
|
||||
extern int _eshared;
|
||||
char kernel_nss_name[NSS_NAME_SIZE + 1];
|
||||
|
||||
#ifdef CONFIG_SHARED_KERNEL
|
||||
static __init void create_kernel_nss(void)
|
||||
{
|
||||
unsigned int i, stext_pfn, eshared_pfn, end_pfn, min_size;
|
||||
#ifdef CONFIG_BLK_DEV_INITRD
|
||||
unsigned int sinitrd_pfn, einitrd_pfn;
|
||||
#endif
|
||||
int response;
|
||||
char *savesys_ptr;
|
||||
char upper_command_line[COMMAND_LINE_SIZE];
|
||||
char defsys_cmd[DEFSYS_CMD_SIZE];
|
||||
char savesys_cmd[SAVESYS_CMD_SIZE];
|
||||
|
||||
/* Do nothing if we are not running under VM */
|
||||
if (!MACHINE_IS_VM)
|
||||
return;
|
||||
|
||||
/* Convert COMMAND_LINE to upper case */
|
||||
for (i = 0; i < strlen(COMMAND_LINE); i++)
|
||||
upper_command_line[i] = toupper(COMMAND_LINE[i]);
|
||||
|
||||
savesys_ptr = strstr(upper_command_line, "SAVESYS=");
|
||||
|
||||
if (!savesys_ptr)
|
||||
return;
|
||||
|
||||
savesys_ptr += 8; /* Point to the beginning of the NSS name */
|
||||
for (i = 0; i < NSS_NAME_SIZE; i++) {
|
||||
if (savesys_ptr[i] == ' ' || savesys_ptr[i] == '\0')
|
||||
break;
|
||||
kernel_nss_name[i] = savesys_ptr[i];
|
||||
}
|
||||
|
||||
stext_pfn = PFN_DOWN(__pa(&_stext));
|
||||
eshared_pfn = PFN_DOWN(__pa(&_eshared));
|
||||
end_pfn = PFN_UP(__pa(&_end));
|
||||
min_size = end_pfn << 2;
|
||||
|
||||
sprintf(defsys_cmd, "DEFSYS %s 00000-%.5X EW %.5X-%.5X SR %.5X-%.5X",
|
||||
kernel_nss_name, stext_pfn - 1, stext_pfn, eshared_pfn - 1,
|
||||
eshared_pfn, end_pfn);
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_INITRD
|
||||
if (INITRD_START && INITRD_SIZE) {
|
||||
sinitrd_pfn = PFN_DOWN(__pa(INITRD_START));
|
||||
einitrd_pfn = PFN_UP(__pa(INITRD_START + INITRD_SIZE));
|
||||
min_size = einitrd_pfn << 2;
|
||||
sprintf(defsys_cmd, "%s EW %.5X-%.5X", defsys_cmd,
|
||||
sinitrd_pfn, einitrd_pfn);
|
||||
}
|
||||
#endif
|
||||
|
||||
sprintf(defsys_cmd, "%s EW MINSIZE=%.7iK", defsys_cmd, min_size);
|
||||
sprintf(savesys_cmd, "SAVESYS %s \n IPL %s",
|
||||
kernel_nss_name, kernel_nss_name);
|
||||
|
||||
__cpcmd(defsys_cmd, NULL, 0, &response);
|
||||
|
||||
if (response != 0)
|
||||
return;
|
||||
|
||||
__cpcmd(savesys_cmd, NULL, 0, &response);
|
||||
|
||||
if (response != strlen(savesys_cmd))
|
||||
return;
|
||||
|
||||
ipl_flags = IPL_NSS_VALID;
|
||||
}
|
||||
|
||||
#else /* CONFIG_SHARED_KERNEL */
|
||||
|
||||
static inline void create_kernel_nss(void) { }
|
||||
|
||||
#endif /* CONFIG_SHARED_KERNEL */
|
||||
|
||||
/*
|
||||
* Clear bss memory
|
||||
*/
|
||||
static __init void clear_bss_section(void)
|
||||
{
|
||||
memset(__bss_start, 0, _end - __bss_start);
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize storage key for kernel pages
|
||||
*/
|
||||
static __init void init_kernel_storage_key(void)
|
||||
{
|
||||
unsigned long end_pfn, init_pfn;
|
||||
|
||||
end_pfn = PFN_UP(__pa(&_end));
|
||||
|
||||
for (init_pfn = 0 ; init_pfn < end_pfn; init_pfn++)
|
||||
page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY);
|
||||
}
|
||||
|
||||
static __init void detect_machine_type(void)
|
||||
{
|
||||
struct cpuinfo_S390 *cpuinfo = &S390_lowcore.cpu_data;
|
||||
|
||||
asm volatile("stidp %0" : "=m" (S390_lowcore.cpu_data.cpu_id));
|
||||
|
||||
/* Running under z/VM ? */
|
||||
if (cpuinfo->cpu_id.version == 0xff)
|
||||
machine_flags |= 1;
|
||||
|
||||
/* Running on a P/390 ? */
|
||||
if (cpuinfo->cpu_id.machine == 0x7490)
|
||||
machine_flags |= 4;
|
||||
}
|
||||
|
||||
/*
|
||||
* Save ipl parameters, clear bss memory, initialize storage keys
|
||||
* and create a kernel NSS at startup if the SAVESYS= parm is defined
|
||||
*/
|
||||
void __init startup_init(void)
|
||||
{
|
||||
ipl_save_parameters();
|
||||
clear_bss_section();
|
||||
init_kernel_storage_key();
|
||||
lockdep_init();
|
||||
detect_machine_type();
|
||||
create_kernel_nss();
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
void (*_machine_restart)(char *command) = machine_restart_smp;
|
||||
void (*_machine_halt)(void) = machine_halt_smp;
|
||||
|
||||
@ -103,14 +103,8 @@ config CCW_CONSOLE
|
||||
depends on TN3215_CONSOLE || TN3270_CONSOLE
|
||||
default y
|
||||
|
||||
config SCLP
|
||||
bool "Support for SCLP"
|
||||
help
|
||||
Include support for the SCLP interface to the service element.
|
||||
|
||||
config SCLP_TTY
|
||||
bool "Support for SCLP line mode terminal"
|
||||
depends on SCLP
|
||||
help
|
||||
Include support for IBM SCLP line-mode terminals.
|
||||
|
||||
@ -123,7 +117,6 @@ config SCLP_CONSOLE
|
||||
|
||||
config SCLP_VT220_TTY
|
||||
bool "Support for SCLP VT220-compatible terminal"
|
||||
depends on SCLP
|
||||
help
|
||||
Include support for an IBM SCLP VT220-compatible terminal.
|
||||
|
||||
@ -136,7 +129,6 @@ config SCLP_VT220_CONSOLE
|
||||
|
||||
config SCLP_CPI
|
||||
tristate "Control-Program Identification"
|
||||
depends on SCLP
|
||||
help
|
||||
This option enables the hardware console interface for system
|
||||
identification. This is commonly used for workload management and
|
||||
|
||||
@ -2,7 +2,8 @@
|
||||
# S/390 character devices
|
||||
#
|
||||
|
||||
obj-y += ctrlchar.o keyboard.o defkeymap.o
|
||||
obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
|
||||
sclp_info.o
|
||||
|
||||
obj-$(CONFIG_TN3270) += raw3270.o
|
||||
obj-$(CONFIG_TN3270_CONSOLE) += con3270.o
|
||||
@ -11,7 +12,6 @@ obj-$(CONFIG_TN3270_FS) += fs3270.o
|
||||
|
||||
obj-$(CONFIG_TN3215) += con3215.o
|
||||
|
||||
obj-$(CONFIG_SCLP) += sclp.o sclp_rw.o sclp_quiesce.o
|
||||
obj-$(CONFIG_SCLP_TTY) += sclp_tty.o
|
||||
obj-$(CONFIG_SCLP_CONSOLE) += sclp_con.o
|
||||
obj-$(CONFIG_SCLP_VT220_TTY) += sclp_vt220.o
|
||||
|
||||
@ -96,8 +96,8 @@ static int sclp_init_mask(int calculate);
|
||||
static int sclp_init(void);
|
||||
|
||||
/* Perform service call. Return 0 on success, non-zero otherwise. */
|
||||
static int
|
||||
service_call(sclp_cmdw_t command, void *sccb)
|
||||
int
|
||||
sclp_service_call(sclp_cmdw_t command, void *sccb)
|
||||
{
|
||||
int cc;
|
||||
|
||||
@ -173,7 +173,7 @@ __sclp_start_request(struct sclp_req *req)
|
||||
if (sclp_running_state != sclp_running_state_idle)
|
||||
return 0;
|
||||
del_timer(&sclp_request_timer);
|
||||
rc = service_call(req->command, req->sccb);
|
||||
rc = sclp_service_call(req->command, req->sccb);
|
||||
req->start_count++;
|
||||
|
||||
if (rc == 0) {
|
||||
@ -325,7 +325,7 @@ __sclp_make_read_req(void)
|
||||
sccb = (struct sccb_header *) sclp_read_sccb;
|
||||
clear_page(sccb);
|
||||
memset(&sclp_read_req, 0, sizeof(struct sclp_req));
|
||||
sclp_read_req.command = SCLP_CMDW_READDATA;
|
||||
sclp_read_req.command = SCLP_CMDW_READ_EVENT_DATA;
|
||||
sclp_read_req.status = SCLP_REQ_QUEUED;
|
||||
sclp_read_req.start_count = 0;
|
||||
sclp_read_req.callback = sclp_read_cb;
|
||||
@ -628,7 +628,7 @@ __sclp_make_init_req(u32 receive_mask, u32 send_mask)
|
||||
sccb = (struct init_sccb *) sclp_init_sccb;
|
||||
clear_page(sccb);
|
||||
memset(&sclp_init_req, 0, sizeof(struct sclp_req));
|
||||
sclp_init_req.command = SCLP_CMDW_WRITEMASK;
|
||||
sclp_init_req.command = SCLP_CMDW_WRITE_EVENT_MASK;
|
||||
sclp_init_req.status = SCLP_REQ_FILLED;
|
||||
sclp_init_req.start_count = 0;
|
||||
sclp_init_req.callback = NULL;
|
||||
@ -831,7 +831,7 @@ sclp_check_interface(void)
|
||||
for (retry = 0; retry <= SCLP_INIT_RETRY; retry++) {
|
||||
__sclp_make_init_req(0, 0);
|
||||
sccb = (struct init_sccb *) sclp_init_req.sccb;
|
||||
rc = service_call(sclp_init_req.command, sccb);
|
||||
rc = sclp_service_call(sclp_init_req.command, sccb);
|
||||
if (rc == -EIO)
|
||||
break;
|
||||
sclp_init_req.status = SCLP_REQ_RUNNING;
|
||||
|
||||
@ -12,7 +12,7 @@
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/list.h>
|
||||
|
||||
#include <asm/sclp.h>
|
||||
#include <asm/ebcdic.h>
|
||||
|
||||
/* maximum number of pages concerning our own memory management */
|
||||
@ -49,9 +49,11 @@
|
||||
|
||||
typedef unsigned int sclp_cmdw_t;
|
||||
|
||||
#define SCLP_CMDW_READDATA 0x00770005
|
||||
#define SCLP_CMDW_WRITEDATA 0x00760005
|
||||
#define SCLP_CMDW_WRITEMASK 0x00780005
|
||||
#define SCLP_CMDW_READ_EVENT_DATA 0x00770005
|
||||
#define SCLP_CMDW_WRITE_EVENT_DATA 0x00760005
|
||||
#define SCLP_CMDW_WRITE_EVENT_MASK 0x00780005
|
||||
#define SCLP_CMDW_READ_SCP_INFO 0x00020001
|
||||
#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
|
||||
|
||||
#define GDS_ID_MDSMU 0x1310
|
||||
#define GDS_ID_MDSRouteInfo 0x1311
|
||||
@ -66,13 +68,6 @@ typedef unsigned int sclp_cmdw_t;
|
||||
|
||||
typedef u32 sccb_mask_t; /* ATTENTION: assumes 32bit mask !!! */
|
||||
|
||||
struct sccb_header {
|
||||
u16 length;
|
||||
u8 function_code;
|
||||
u8 control_mask[3];
|
||||
u16 response_code;
|
||||
} __attribute__((packed));
|
||||
|
||||
struct gds_subvector {
|
||||
u8 length;
|
||||
u8 key;
|
||||
@ -131,6 +126,7 @@ void sclp_unregister(struct sclp_register *reg);
|
||||
int sclp_remove_processed(struct sccb_header *sccb);
|
||||
int sclp_deactivate(void);
|
||||
int sclp_reactivate(void);
|
||||
int sclp_service_call(sclp_cmdw_t command, void *sccb);
|
||||
|
||||
/* useful inlines */
|
||||
|
||||
|
||||
@ -169,7 +169,7 @@ cpi_prepare_req(void)
|
||||
}
|
||||
|
||||
/* prepare request data structure presented to SCLP driver */
|
||||
req->command = SCLP_CMDW_WRITEDATA;
|
||||
req->command = SCLP_CMDW_WRITE_EVENT_DATA;
|
||||
req->sccb = sccb;
|
||||
req->status = SCLP_REQ_FILLED;
|
||||
req->callback = cpi_callback;
|
||||
|
||||
57
drivers/s390/char/sclp_info.c
Normal file
57
drivers/s390/char/sclp_info.c
Normal file
@ -0,0 +1,57 @@
|
||||
/*
|
||||
* drivers/s390/char/sclp_info.c
|
||||
*
|
||||
* Copyright IBM Corp. 2007
|
||||
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/string.h>
|
||||
#include <asm/sclp.h>
|
||||
#include "sclp.h"
|
||||
|
||||
struct sclp_readinfo_sccb s390_readinfo_sccb;
|
||||
|
||||
void __init sclp_readinfo_early(void)
|
||||
{
|
||||
sclp_cmdw_t command;
|
||||
struct sccb_header *sccb;
|
||||
int ret;
|
||||
|
||||
__ctl_set_bit(0, 9); /* enable service signal subclass mask */
|
||||
|
||||
sccb = &s390_readinfo_sccb.header;
|
||||
command = SCLP_CMDW_READ_SCP_INFO_FORCED;
|
||||
while (1) {
|
||||
u16 response;
|
||||
|
||||
memset(&s390_readinfo_sccb, 0, sizeof(s390_readinfo_sccb));
|
||||
sccb->length = sizeof(s390_readinfo_sccb);
|
||||
sccb->control_mask[2] = 0x80;
|
||||
|
||||
ret = sclp_service_call(command, &s390_readinfo_sccb);
|
||||
|
||||
if (ret == -EIO)
|
||||
goto out;
|
||||
if (ret == -EBUSY)
|
||||
continue;
|
||||
|
||||
__load_psw_mask(PSW_BASE_BITS | PSW_MASK_EXT |
|
||||
PSW_MASK_WAIT | PSW_DEFAULT_KEY);
|
||||
local_irq_disable();
|
||||
barrier();
|
||||
|
||||
response = sccb->response_code;
|
||||
|
||||
if (response == 0x10)
|
||||
break;
|
||||
|
||||
if (response != 0x1f0 || command == SCLP_CMDW_READ_SCP_INFO)
|
||||
break;
|
||||
|
||||
command = SCLP_CMDW_READ_SCP_INFO;
|
||||
}
|
||||
out:
|
||||
__ctl_clear_bit(0, 9); /* disable service signal subclass mask */
|
||||
}
|
||||
@ -460,7 +460,7 @@ sclp_emit_buffer(struct sclp_buffer *buffer,
|
||||
sccb->msg_buf.header.type = EvTyp_PMsgCmd;
|
||||
else
|
||||
return -ENOSYS;
|
||||
buffer->request.command = SCLP_CMDW_WRITEDATA;
|
||||
buffer->request.command = SCLP_CMDW_WRITE_EVENT_DATA;
|
||||
buffer->request.status = SCLP_REQ_FILLED;
|
||||
buffer->request.callback = sclp_writedata_callback;
|
||||
buffer->request.callback_data = buffer;
|
||||
|
||||
@ -207,7 +207,7 @@ __sclp_vt220_emit(struct sclp_vt220_request *request)
|
||||
request->sclp_req.status = SCLP_REQ_FAILED;
|
||||
return -EIO;
|
||||
}
|
||||
request->sclp_req.command = SCLP_CMDW_WRITEDATA;
|
||||
request->sclp_req.command = SCLP_CMDW_WRITE_EVENT_DATA;
|
||||
request->sclp_req.status = SCLP_REQ_FILLED;
|
||||
request->sclp_req.callback = sclp_vt220_callback;
|
||||
request->sclp_req.callback_data = (void *) request;
|
||||
|
||||
@ -895,11 +895,11 @@ static int stsch_reset(struct subchannel_id schid, volatile struct schib *addr)
|
||||
int rc;
|
||||
|
||||
pgm_check_occured = 0;
|
||||
s390_reset_pgm_handler = cio_reset_pgm_check_handler;
|
||||
s390_base_pgm_handler_fn = cio_reset_pgm_check_handler;
|
||||
rc = stsch(schid, addr);
|
||||
s390_reset_pgm_handler = NULL;
|
||||
s390_base_pgm_handler_fn = NULL;
|
||||
|
||||
/* The program check handler could have changed pgm_check_occured */
|
||||
/* The program check handler could have changed pgm_check_occured. */
|
||||
barrier();
|
||||
|
||||
if (pgm_check_occured)
|
||||
@ -957,7 +957,7 @@ static void css_reset(void)
|
||||
/* Reset subchannels. */
|
||||
for_each_subchannel(__shutdown_subchannel_easy, NULL);
|
||||
/* Reset channel paths. */
|
||||
s390_reset_mcck_handler = s390_reset_chpids_mcck_handler;
|
||||
s390_base_mcck_handler_fn = s390_reset_chpids_mcck_handler;
|
||||
/* Enable channel report machine checks. */
|
||||
__ctl_set_bit(14, 28);
|
||||
/* Temporarily reenable machine checks. */
|
||||
@ -982,7 +982,7 @@ static void css_reset(void)
|
||||
local_mcck_disable();
|
||||
/* Disable channel report machine checks. */
|
||||
__ctl_clear_bit(14, 28);
|
||||
s390_reset_mcck_handler = NULL;
|
||||
s390_base_mcck_handler_fn = NULL;
|
||||
}
|
||||
|
||||
static struct reset_call css_reset_call = {
|
||||
|
||||
@ -330,6 +330,18 @@ static inline void disabled_wait(unsigned long code)
|
||||
#endif /* __s390x__ */
|
||||
}
|
||||
|
||||
/*
|
||||
* Basic Machine Check/Program Check Handler.
|
||||
*/
|
||||
|
||||
extern void s390_base_mcck_handler(void);
|
||||
extern void s390_base_pgm_handler(void);
|
||||
extern void s390_base_ext_handler(void);
|
||||
|
||||
extern void (*s390_base_mcck_handler_fn)(void);
|
||||
extern void (*s390_base_pgm_handler_fn)(void);
|
||||
extern void (*s390_base_ext_handler_fn)(void);
|
||||
|
||||
/*
|
||||
* CPU idle notifier chain.
|
||||
*/
|
||||
|
||||
@ -18,7 +18,4 @@ struct reset_call {
|
||||
extern void register_reset_call(struct reset_call *reset);
|
||||
extern void unregister_reset_call(struct reset_call *reset);
|
||||
extern void s390_reset_system(void);
|
||||
extern void (*s390_reset_mcck_handler)(void);
|
||||
extern void (*s390_reset_pgm_handler)(void);
|
||||
|
||||
#endif /* _ASM_S390_RESET_H */
|
||||
|
||||
39
include/asm-s390/sclp.h
Normal file
39
include/asm-s390/sclp.h
Normal file
@ -0,0 +1,39 @@
|
||||
/*
|
||||
* include/asm-s390/sclp.h
|
||||
*
|
||||
* Copyright IBM Corp. 2007
|
||||
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
|
||||
*/
|
||||
|
||||
#ifndef _ASM_S390_SCLP_H
|
||||
#define _ASM_S390_SCLP_H
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
struct sccb_header {
|
||||
u16 length;
|
||||
u8 function_code;
|
||||
u8 control_mask[3];
|
||||
u16 response_code;
|
||||
} __attribute__((packed));
|
||||
|
||||
#define LOADPARM_LEN 8
|
||||
|
||||
struct sclp_readinfo_sccb {
|
||||
struct sccb_header header; /* 0-7 */
|
||||
u16 rnmax; /* 8-9 */
|
||||
u8 rnsize; /* 10 */
|
||||
u8 _reserved0[24 - 11]; /* 11-23 */
|
||||
u8 loadparm[LOADPARM_LEN]; /* 24-31 */
|
||||
u8 _reserved1[91 - 32]; /* 32-90 */
|
||||
u8 flags; /* 91 */
|
||||
u8 _reserved2[100 - 92]; /* 92-99 */
|
||||
u32 rnsize2; /* 100-103 */
|
||||
u64 rnmax2; /* 104-111 */
|
||||
u8 _reserved3[4096 - 112]; /* 112-4095 */
|
||||
} __attribute__((packed, aligned(4096)));
|
||||
|
||||
extern struct sclp_readinfo_sccb s390_readinfo_sccb;
|
||||
extern void sclp_readinfo_early(void);
|
||||
|
||||
#endif /* _ASM_S390_SCLP_H */
|
||||
Loading…
Reference in New Issue
Block a user