diff options
| author | Sam Ravnborg <sam@ravnborg.org> | 2012-07-26 11:02:15 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-26 16:46:15 -0700 |
| commit | 7cdfbc74c8820cd33367fb3d61edcbe9829a06c5 (patch) | |
| tree | 96364b90a0a2f1406e5cc0dcbf53eba324c43450 /arch/sparc | |
| parent | f71a2aacc63e3185e27ee45e8ebc2bebad9bec28 (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/sparc')
| -rw-r--r-- | arch/sparc/mm/srmmu.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c index 146742bee39a..ab62595cf366 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; } } |