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parisc: use memblock_alloc() instead of custom get_memblock()

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The get_memblock() function implements custom bottom-up memblock allocator.
Setting 'memblock_bottom_up = true' before any memblock allocation is done
allows replacing get_memblock() calls with memblock_alloc().

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Tested-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Mike Rapoport 2019-02-12 17:16:12 +02:00 committed by Helge Deller
parent c11ef0a883
commit 6a5280012d
1 changed files with 19 additions and 33 deletions
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52
arch/parisc/mm/init.c
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@ -79,36 +79,6 @@ static struct resource sysram_resources[MAX_PHYSMEM_RANGES] __read_mostly;
physmem_range_t pmem_ranges[MAX_PHYSMEM_RANGES] __read_mostly;
int npmem_ranges __read_mostly;
/*
* get_memblock() allocates pages via memblock.
* We can't use memblock_find_in_range(0, KERNEL_INITIAL_SIZE) here since it
* doesn't allocate from bottom to top which is needed because we only created
* the initial mapping up to KERNEL_INITIAL_SIZE in the assembly bootup code.
*/
static void * __init get_memblock(unsigned long size)
{
static phys_addr_t search_addr __initdata;
phys_addr_t phys;
if (!search_addr)
search_addr = PAGE_ALIGN(__pa((unsigned long) &_end));
search_addr = ALIGN(search_addr, size);
while (!memblock_is_region_memory(search_addr, size) ||
memblock_is_region_reserved(search_addr, size)) {
search_addr += size;
}
phys = search_addr;
if (phys)
memblock_reserve(phys, size);
else
panic("get_memblock() failed.\n");
memset(__va(phys), 0, size);
return __va(phys);
}
#ifdef CONFIG_64BIT
#define MAX_MEM (~0UL)
#else /* !CONFIG_64BIT */
@ -321,6 +291,13 @@ static void __init setup_bootmem(void)
max_pfn = start_pfn + npages;
}
/*
* We can't use memblock top-down allocations because we only
* created the initial mapping up to KERNEL_INITIAL_SIZE in
* the assembly bootup code.
*/
memblock_set_bottom_up(true);
/* IOMMU is always used to access "high mem" on those boxes
* that can support enough mem that a PCI device couldn't
* directly DMA to any physical addresses.
@ -442,7 +419,10 @@ static void __init map_pages(unsigned long start_vaddr,
*/
if (!pmd) {
pmd = (pmd_t *) get_memblock(PAGE_SIZE << PMD_ORDER);
pmd = memblock_alloc(PAGE_SIZE << PMD_ORDER,
PAGE_SIZE << PMD_ORDER);
if (!pmd)
panic("pmd allocation failed.\n");
pmd = (pmd_t *) __pa(pmd);
}
@ -461,7 +441,10 @@ static void __init map_pages(unsigned long start_vaddr,
pg_table = (pte_t *)pmd_address(*pmd);
if (!pg_table) {
pg_table = (pte_t *) get_memblock(PAGE_SIZE);
pg_table = memblock_alloc(PAGE_SIZE,
PAGE_SIZE);
if (!pg_table)
panic("page table allocation failed\n");
pg_table = (pte_t *) __pa(pg_table);
}
@ -700,7 +683,10 @@ static void __init pagetable_init(void)
}
#endif
empty_zero_page = get_memblock(PAGE_SIZE);
empty_zero_page = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
if (!empty_zero_page)
panic("zero page allocation failed.\n");
}
static void __init gateway_init(void)