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[S390] sclp: introduce some new interfaces.

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Introduce some new interfaces so that random subsystems don't have to
mess around with sclp internal structures.

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
2007-07-10 11:24:09 +02:00
committed by Martin Schwidefsky
parent bccdbdc9bd
commit 05dd25307c
5 changed files with 122 additions and 102 deletions
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44
arch/s390/kernel/early.c
View File

@ -171,37 +171,6 @@ static inline int memory_fast_detect(void)
}
#endif
#define ADDR2G (1UL << 31)
static noinline __init unsigned long sclp_memory_detect(void)
{
struct sclp_readinfo_sccb *sccb;
unsigned long long memsize;
sccb = &s390_readinfo_sccb;
if (sccb->header.response_code != 0x10)
return 0;
if (sccb->rnsize)
memsize = sccb->rnsize << 20;
else
memsize = sccb->rnsize2 << 20;
if (sccb->rnmax)
memsize *= sccb->rnmax;
else
memsize *= sccb->rnmax2;
#ifndef CONFIG_64BIT
/*
* Can't deal with more than 2G in 31 bit addressing mode, so
* limit the value in order to avoid strange side effects.
*/
if (memsize > ADDR2G)
memsize = ADDR2G;
#endif
return (unsigned long) memsize;
}
static inline __init unsigned long __tprot(unsigned long addr)
{
int cc = -1;
@ -218,6 +187,7 @@ static inline __init unsigned long __tprot(unsigned long addr)
/* Checking memory in 128KB increments. */
#define CHUNK_INCR (1UL << 17)
#define ADDR2G (1UL << 31)
static noinline __init void find_memory_chunks(unsigned long memsize)
{
@ -293,7 +263,7 @@ static noinline __init void setup_lowcore_early(void)
*/
void __init startup_init(void)
{
unsigned long memsize;
unsigned long long memsize;
ipl_save_parameters();
clear_bss_section();
@ -306,7 +276,15 @@ void __init startup_init(void)
setup_lowcore_early();
sclp_readinfo_early();
memsize = sclp_memory_detect();
#ifndef CONFIG_64BIT
/*
* Can't deal with more than 2G in 31 bit addressing mode, so
* limit the value in order to avoid strange side effects.
*/
if (memsize > ADDR2G)
memsize = ADDR2G;
#endif
if (memory_fast_detect() < 0)
find_memory_chunks(memsize);
find_memory_chunks((unsigned long) memsize);
lockdep_on();
}

17
arch/s390/kernel/ipl.c
View File

@ -25,10 +25,6 @@
#define IPL_PARM_BLOCK_VERSION 0
#define SCCB_VALID (s390_readinfo_sccb.header.response_code == 0x10)
#define SCCB_LOADPARM (&s390_readinfo_sccb.loadparm)
#define SCCB_FLAG (s390_readinfo_sccb.flags)
#define IPL_UNKNOWN_STR "unknown"
#define IPL_CCW_STR "ccw"
#define IPL_FCP_STR "fcp"
@ -146,6 +142,8 @@ static struct ipl_parameter_block *dump_block_ccw;
static enum shutdown_action on_panic_action = SHUTDOWN_STOP;
static struct sclp_ipl_info sclp_ipl_info;
int diag308(unsigned long subcode, void *addr)
{
register unsigned long _addr asm("0") = (unsigned long) addr;
@ -375,9 +373,9 @@ static ssize_t ipl_ccw_loadparm_show(struct kset *kset, char *page)
{
char loadparm[LOADPARM_LEN + 1] = {};
if (!SCCB_VALID)
if (!sclp_ipl_info.is_valid)
return sprintf(page, "#unknown#\n");
memcpy(loadparm, SCCB_LOADPARM, LOADPARM_LEN);
memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
EBCASC(loadparm, LOADPARM_LEN);
strstrip(loadparm);
return sprintf(page, "%s\n", loadparm);
@ -910,9 +908,9 @@ static int __init reipl_ccw_init(void)
reipl_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
/* check if read scp info worked and set loadparm */
if (SCCB_VALID)
if (sclp_ipl_info.is_valid)
memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
SCCB_LOADPARM, LOADPARM_LEN);
&sclp_ipl_info.loadparm, LOADPARM_LEN);
else
/* read scp info failed: set empty loadparm (EBCDIC blanks) */
memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
@ -1007,7 +1005,7 @@ static int __init dump_fcp_init(void)
{
int rc;
if(!(SCCB_FLAG & 0x2) || !SCCB_VALID)
if (!sclp_ipl_info.has_dump)
return 0; /* LDIPL DUMP is not installed */
if (!diag308_set_works)
return 0;
@ -1088,6 +1086,7 @@ static int __init s390_ipl_init(void)
{
int rc;
sclp_get_ipl_info(&sclp_ipl_info);
reipl_probe();
rc = ipl_init();
if (rc)