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authorHeiko Carstens <heiko.carstens@de.ibm.com>2007-07-10 11:24:09 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-07-10 11:24:42 +0200
commit05dd25307ca67cbfa0207bbba2e6c79fa97d125b (patch)
tree4601c5732e71883bffab31a4a786f838e8473f58 /arch/s390
parentbccdbdc9bd7db3a32c14d8a47f1fb66e3de3c92f (diff)
downloadlinux-2.6.34-ux500-05dd25307ca67cbfa0207bbba2e6c79fa97d125b.tar.gz
[S390] sclp: introduce some new interfaces.
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>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kernel/early.c44
-rw-r--r--arch/s390/kernel/ipl.c17
2 files changed, 19 insertions, 42 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 50538e54561..9fcf3f1f47b 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -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();
}
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 367caf92ea7..82b131ddd7f 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -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)