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authorSam Ravnborg <sam@ravnborg.org>2012-07-26 11:02:15 +0000
committerDavid S. Miller <davem@davemloft.net>2012-07-26 16:46:15 -0700
commit7cdfbc74c8820cd33367fb3d61edcbe9829a06c5 (patch)
tree96364b90a0a2f1406e5cc0dcbf53eba324c43450 /arch
parentf71a2aacc63e3185e27ee45e8ebc2bebad9bec28 (diff)
sparc32: beautify srmmu_inherit_prom_mappings()
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
-rw-r--r--arch/sparc/mm/srmmu.c26
1 files changed, 16 insertions, 10 deletions
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index 146742bee39..ab62595cf36 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -677,44 +677,48 @@ static inline unsigned long srmmu_probe(unsigned long vaddr)
static void __init srmmu_inherit_prom_mappings(unsigned long start,
unsigned long end)
{
+ unsigned long probed;
+ unsigned long addr;
pgd_t *pgdp;
pmd_t *pmdp;
pte_t *ptep;
- int what = 0; /* 0 = normal-pte, 1 = pmd-level pte, 2 = pgd-level pte */
- unsigned long prompte;
+ int what; /* 0 = normal-pte, 1 = pmd-level pte, 2 = pgd-level pte */
while (start <= end) {
if (start == 0)
break; /* probably wrap around */
if (start == 0xfef00000)
start = KADB_DEBUGGER_BEGVM;
- if (!(prompte = srmmu_probe(start))) {
+ probed = srmmu_probe(start);
+ if (!probed) {
+ /* continue probing until we find an entry */
start += PAGE_SIZE;
continue;
}
/* A red snapper, see what it really is. */
what = 0;
+ addr = start - PAGE_SIZE;
if (!(start & ~(SRMMU_REAL_PMD_MASK))) {
- if (srmmu_probe((start - PAGE_SIZE) + SRMMU_REAL_PMD_SIZE) == prompte)
+ if (srmmu_probe(addr + SRMMU_REAL_PMD_SIZE) == probed)
what = 1;
}
if (!(start & ~(SRMMU_PGDIR_MASK))) {
- if (srmmu_probe((start-PAGE_SIZE) + SRMMU_PGDIR_SIZE) ==
- prompte)
+ if (srmmu_probe(addr + SRMMU_PGDIR_SIZE) == probed)
what = 2;
}
pgdp = pgd_offset_k(start);
if (what == 2) {
- *(pgd_t *)__nocache_fix(pgdp) = __pgd(prompte);
+ *(pgd_t *)__nocache_fix(pgdp) = __pgd(probed);
start += SRMMU_PGDIR_SIZE;
continue;
}
if (pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
- pmdp = __srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
+ pmdp = __srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE,
+ SRMMU_PMD_TABLE_SIZE);
if (pmdp == NULL)
early_pgtable_allocfail("pmd");
memset(__nocache_fix(pmdp), 0, SRMMU_PMD_TABLE_SIZE);
@@ -734,13 +738,15 @@ static void __init srmmu_inherit_prom_mappings(unsigned long start,
* good hardware PTE piece. Alternatives seem worse.
*/
unsigned int x; /* Index of HW PMD in soft cluster */
+ unsigned long *val;
x = (start >> PMD_SHIFT) & 15;
- *(unsigned long *)__nocache_fix(&pmdp->pmdv[x]) = prompte;
+ val = &pmdp->pmdv[x];
+ *(unsigned long *)__nocache_fix(val) = probed;
start += SRMMU_REAL_PMD_SIZE;
continue;
}
ptep = pte_offset_kernel(__nocache_fix(pmdp), start);
- *(pte_t *)__nocache_fix(ptep) = __pte(prompte);
+ *(pte_t *)__nocache_fix(ptep) = __pte(probed);
start += PAGE_SIZE;
}
}