diff options
Diffstat (limited to 'arch/sh/mm')
| -rw-r--r-- | arch/sh/mm/pmb.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index 9a516b89839..9429355c18c 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c @@ -68,6 +68,8 @@ static DEFINE_RWLOCK(pmb_rwlock); static struct pmb_entry pmb_entry_list[NR_PMB_ENTRIES]; static DECLARE_BITMAP(pmb_map, NR_PMB_ENTRIES); +static unsigned int pmb_iomapping_enabled; + static __always_inline unsigned long mk_pmb_entry(unsigned int entry) { return (entry & PMB_E_MASK) << PMB_E_SHIFT; @@ -284,6 +286,9 @@ void __iomem *pmb_remap_caller(phys_addr_t phys, unsigned long size, unsigned long aligned; struct vm_struct *area; + if (!pmb_iomapping_enabled) + return NULL; + /* * Small mappings need to go through the TLB. */ @@ -684,6 +689,18 @@ static void __init pmb_resize(void) } #endif +static int __init early_pmb(char *p) +{ + if (!p) + return 0; + + if (strstr(p, "iomap")) + pmb_iomapping_enabled = 1; + + return 0; +} +early_param("pmb", early_pmb); + void __init pmb_init(void) { /* Synchronize software state */ |