Commit 7676bef9 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

[S390] Have s390 use add_active_range() and free_area_init_nodes. 



Size zones and holes in an architecture independent manner for s390.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
parent cb601d41

arch/s390/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -233,6 +233,9 @@ config WARN_STACK_SIZE 
	  This allows you to specify the maximum frame size a function may

	  have without the compiler complaining about it.



config ARCH_POPULATES_NODE_MAP

	def_bool y



source "mm/Kconfig"



comment "I/O subsystem configuration"

arch/s390/defconfig

+1 −0
Original line number Diff line number Diff line
@@ -118,6 +118,7 @@ CONFIG_PACK_STACK=y 
CONFIG_CHECK_STACK=y

CONFIG_STACK_GUARD=256

# CONFIG_WARN_STACK is not set

CONFIG_ARCH_POPULATES_NODE_MAP=y

CONFIG_SELECT_MEMORY_MODEL=y

CONFIG_FLATMEM_MANUAL=y

# CONFIG_DISCONTIGMEM_MANUAL is not set

arch/s390/kernel/setup.c

+13 −42
Original line number Diff line number Diff line
@@ -70,7 +70,6 @@ struct { 
#define CHUNK_READ_WRITE 0

#define CHUNK_READ_ONLY 1

volatile int __cpu_logical_map[NR_CPUS]; /* logical cpu to cpu address */

unsigned long __initdata zholes_size[MAX_NR_ZONES];

static unsigned long __initdata memory_end;



/*
@@ -358,21 +357,6 @@ void machine_power_off(void) 
 */

void (*pm_power_off)(void) = machine_power_off;



static void __init

add_memory_hole(unsigned long start, unsigned long end)

{

	unsigned long dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;



	if (end <= dma_pfn)

		zholes_size[ZONE_DMA] += end - start + 1;

	else if (start > dma_pfn)

		zholes_size[ZONE_NORMAL] += end - start + 1;

	else {

		zholes_size[ZONE_DMA] += dma_pfn - start + 1;

		zholes_size[ZONE_NORMAL] += end - dma_pfn;

	}

}



static int __init early_parse_mem(char *p)

{

	memory_end = memparse(p, &p);
@@ -494,7 +478,6 @@ setup_memory(void) 
{

        unsigned long bootmap_size;

	unsigned long start_pfn, end_pfn, init_pfn;

	unsigned long last_rw_end;

	int i;



	/*
@@ -543,46 +526,34 @@ setup_memory(void) 
#endif



	/*

	 * Initialize the boot-time allocator (with low memory only):

	 * Initialize the boot-time allocator

	 */

	bootmap_size = init_bootmem(start_pfn, end_pfn);



	/*

	 * Register RAM areas with the bootmem allocator.

	 */

	last_rw_end = start_pfn;



	for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {

		unsigned long start_chunk, end_chunk;

		unsigned long start_chunk, end_chunk, pfn;



		if (memory_chunk[i].type != CHUNK_READ_WRITE)

			continue;

		start_chunk = (memory_chunk[i].addr + PAGE_SIZE - 1);

		start_chunk >>= PAGE_SHIFT;

		end_chunk = (memory_chunk[i].addr + memory_chunk[i].size);

		end_chunk >>= PAGE_SHIFT;

		if (start_chunk < start_pfn)

			start_chunk = start_pfn;

		if (end_chunk > end_pfn)

			end_chunk = end_pfn;

		if (start_chunk < end_chunk) {

			/* Initialize storage key for RAM pages */

			for (init_pfn = start_chunk ; init_pfn < end_chunk;

			     init_pfn++)

				page_set_storage_key(init_pfn << PAGE_SHIFT,

						     PAGE_DEFAULT_KEY);

			free_bootmem(start_chunk << PAGE_SHIFT,

				     (end_chunk - start_chunk) << PAGE_SHIFT);

			if (last_rw_end < start_chunk)

				add_memory_hole(last_rw_end, start_chunk - 1);

			last_rw_end = end_chunk;

		}

		start_chunk = PFN_DOWN(memory_chunk[i].addr);

		end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size) - 1;

		end_chunk = min(end_chunk, end_pfn);

		if (start_chunk >= end_chunk)

			continue;

		add_active_range(0, start_chunk, end_chunk);

		pfn = max(start_chunk, start_pfn);

		for (; pfn <= end_chunk; pfn++)

			page_set_storage_key(PFN_PHYS(pfn), PAGE_DEFAULT_KEY);

	}



	psw_set_key(PAGE_DEFAULT_KEY);



	if (last_rw_end < end_pfn - 1)

		add_memory_hole(last_rw_end, end_pfn - 1);

	free_bootmem_with_active_regions(0, max_pfn);

	reserve_bootmem(0, PFN_PHYS(start_pfn));



	/*

	 * Reserve the bootmem bitmap itself as well. We do this in two

arch/s390/mm/init.c

+10 −25
Original line number Diff line number Diff line
@@ -82,7 +82,6 @@ void show_mem(void) 
        printk("%d pages swap cached\n",cached);

}



extern unsigned long __initdata zholes_size[];

/*

 * paging_init() sets up the page tables

 */
@@ -99,16 +98,15 @@ void __init paging_init(void) 
        unsigned long pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) | _KERNSEG_TABLE;

        static const int ssm_mask = 0x04000000L;

	unsigned long ro_start_pfn, ro_end_pfn;

	unsigned long zones_size[MAX_NR_ZONES];

	unsigned long max_zone_pfns[MAX_NR_ZONES];



	ro_start_pfn = PFN_DOWN((unsigned long)&__start_rodata);

	ro_end_pfn = PFN_UP((unsigned long)&__end_rodata);



	memset(zones_size, 0, sizeof(zones_size));

	zones_size[ZONE_DMA] = max_low_pfn;

	free_area_init_node(0, &contig_page_data, zones_size,

			    __pa(PAGE_OFFSET) >> PAGE_SHIFT,

			    zholes_size);

	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));

	max_zone_pfns[ZONE_DMA] = max_low_pfn;

	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;

	free_area_init_nodes(max_zone_pfns);



	/* unmap whole virtual address space */
@@ -153,7 +151,6 @@ void __init paging_init(void) 
	__raw_local_irq_ssm(ssm_mask);



        local_flush_tlb();

        return;

}



#else /* CONFIG_64BIT */
@@ -169,26 +166,16 @@ void __init paging_init(void) 
        unsigned long pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) |

          _KERN_REGION_TABLE;

	static const int ssm_mask = 0x04000000L;

	unsigned long zones_size[MAX_NR_ZONES];

	unsigned long dma_pfn, high_pfn;

	unsigned long ro_start_pfn, ro_end_pfn;

	unsigned long max_zone_pfns[MAX_NR_ZONES];



	memset(zones_size, 0, sizeof(zones_size));

	dma_pfn = MAX_DMA_ADDRESS >> PAGE_SHIFT;

	high_pfn = max_low_pfn;

	ro_start_pfn = PFN_DOWN((unsigned long)&__start_rodata);

	ro_end_pfn = PFN_UP((unsigned long)&__end_rodata);



	if (dma_pfn > high_pfn)

		zones_size[ZONE_DMA] = high_pfn;

	else {

		zones_size[ZONE_DMA] = dma_pfn;

		zones_size[ZONE_NORMAL] = high_pfn - dma_pfn;

	}



	/* Initialize mem_map[].  */

	free_area_init_node(0, &contig_page_data, zones_size,

			    __pa(PAGE_OFFSET) >> PAGE_SHIFT, zholes_size);

	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));

	max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS);

	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;

	free_area_init_nodes(max_zone_pfns);



	/*

	 * map whole physical memory to virtual memory (identity mapping)
@@ -237,8 +224,6 @@ void __init paging_init(void) 
	__raw_local_irq_ssm(ssm_mask);



        local_flush_tlb();



        return;

}

#endif /* CONFIG_64BIT */