diff options
Diffstat (limited to 'arch/arc/mm')
| -rw-r--r-- | arch/arc/mm/highmem.c | 28 | ||||
| -rw-r--r-- | arch/arc/mm/init.c | 41 |
2 files changed, 17 insertions, 52 deletions
diff --git a/arch/arc/mm/highmem.c b/arch/arc/mm/highmem.c index fc8849e4f72e..479b0d72d3cf 100644 --- a/arch/arc/mm/highmem.c +++ b/arch/arc/mm/highmem.c @@ -49,38 +49,23 @@ extern pte_t * pkmap_page_table; static pte_t * fixmap_page_table; -void *kmap(struct page *page) -{ - BUG_ON(in_interrupt()); - if (!PageHighMem(page)) - return page_address(page); - - return kmap_high(page); -} -EXPORT_SYMBOL(kmap); - -void *kmap_atomic(struct page *page) +void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) { int idx, cpu_idx; unsigned long vaddr; - preempt_disable(); - pagefault_disable(); - if (!PageHighMem(page)) - return page_address(page); - cpu_idx = kmap_atomic_idx_push(); idx = cpu_idx + KM_TYPE_NR * smp_processor_id(); vaddr = FIXMAP_ADDR(idx); set_pte_at(&init_mm, vaddr, fixmap_page_table + idx, - mk_pte(page, kmap_prot)); + mk_pte(page, prot)); return (void *)vaddr; } -EXPORT_SYMBOL(kmap_atomic); +EXPORT_SYMBOL(kmap_atomic_high_prot); -void __kunmap_atomic(void *kv) +void kunmap_atomic_high(void *kv) { unsigned long kvaddr = (unsigned long)kv; @@ -102,11 +87,8 @@ void __kunmap_atomic(void *kv) kmap_atomic_idx_pop(); } - - pagefault_enable(); - preempt_enable(); } -EXPORT_SYMBOL(__kunmap_atomic); +EXPORT_SYMBOL(kunmap_atomic_high); static noinline pte_t * __init alloc_kmap_pgtable(unsigned long kvaddr) { diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index 0920c969c466..e7bdc2ac1c87 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -63,11 +63,13 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) low_mem_sz = size; in_use = 1; + memblock_add_node(base, size, 0); } else { #ifdef CONFIG_HIGHMEM high_mem_start = base; high_mem_sz = size; in_use = 1; + memblock_add_node(base, size, 1); #endif } @@ -75,6 +77,11 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) base, TO_MB(size), !in_use ? "Not used":""); } +bool arch_has_descending_max_zone_pfns(void) +{ + return !IS_ENABLED(CONFIG_ARC_HAS_PAE40); +} + /* * First memory setup routine called from setup_arch() * 1. setup swapper's mm @init_mm @@ -83,8 +90,7 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) */ void __init setup_arch_memory(void) { - unsigned long zones_size[MAX_NR_ZONES]; - unsigned long zones_holes[MAX_NR_ZONES]; + unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 }; init_mm.start_code = (unsigned long)_text; init_mm.end_code = (unsigned long)_etext; @@ -115,7 +121,6 @@ void __init setup_arch_memory(void) * the crash */ - memblock_add_node(low_mem_start, low_mem_sz, 0); memblock_reserve(CONFIG_LINUX_LINK_BASE, __pa(_end) - CONFIG_LINUX_LINK_BASE); @@ -133,22 +138,7 @@ void __init setup_arch_memory(void) memblock_dump_all(); /*----------------- node/zones setup --------------------------*/ - memset(zones_size, 0, sizeof(zones_size)); - memset(zones_holes, 0, sizeof(zones_holes)); - - zones_size[ZONE_NORMAL] = max_low_pfn - min_low_pfn; - zones_holes[ZONE_NORMAL] = 0; - - /* - * We can't use the helper free_area_init(zones[]) because it uses - * PAGE_OFFSET to compute the @min_low_pfn which would be wrong - * when our kernel doesn't start at PAGE_OFFSET, i.e. - * PAGE_OFFSET != CONFIG_LINUX_RAM_BASE - */ - free_area_init_node(0, /* node-id */ - zones_size, /* num pages per zone */ - min_low_pfn, /* first pfn of node */ - zones_holes); /* holes */ + max_zone_pfn[ZONE_NORMAL] = max_low_pfn; #ifdef CONFIG_HIGHMEM /* @@ -168,20 +158,13 @@ void __init setup_arch_memory(void) min_high_pfn = PFN_DOWN(high_mem_start); max_high_pfn = PFN_DOWN(high_mem_start + high_mem_sz); - zones_size[ZONE_NORMAL] = 0; - zones_holes[ZONE_NORMAL] = 0; - - zones_size[ZONE_HIGHMEM] = max_high_pfn - min_high_pfn; - zones_holes[ZONE_HIGHMEM] = 0; - - free_area_init_node(1, /* node-id */ - zones_size, /* num pages per zone */ - min_high_pfn, /* first pfn of node */ - zones_holes); /* holes */ + max_zone_pfn[ZONE_HIGHMEM] = max_high_pfn; high_memory = (void *)(min_high_pfn << PAGE_SHIFT); kmap_init(); #endif + + free_area_init(max_zone_pfn); } /* |