sh: Use bootmem ontop of lmb
Rework the bootmem allocator to use the lmb framework. Signed-off-by: Matt Fleming <matt@console-pimps.org> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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47220f623c
commit
c601a51af1
3 changed files with 61 additions and 21 deletions
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@ -10,6 +10,7 @@ config SUPERH
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select EMBEDDED
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select HAVE_CLK
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select HAVE_IDE
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select HAVE_LMB
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select HAVE_OPROFILE
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select HAVE_GENERIC_DMA_COHERENT
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select HAVE_IOREMAP_PROT if MMU
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6
arch/sh/include/asm/lmb.h
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6
arch/sh/include/asm/lmb.h
Normal file
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@ -0,0 +1,6 @@
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#ifndef __ASM_SH_LMB_H
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#define __ASM_SH_LMB_H
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#define LMB_REAL_LIMIT 0
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#endif /* __ASM_SH_LMB_H */
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@ -30,6 +30,7 @@
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/lmb.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/page.h>
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@ -233,39 +234,45 @@ void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
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void __init setup_bootmem_allocator(unsigned long free_pfn)
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{
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unsigned long bootmap_size;
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unsigned long bootmap_pages, bootmem_paddr;
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u64 total_pages = (lmb_end_of_DRAM() - __MEMORY_START) >> PAGE_SHIFT;
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int i;
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bootmap_pages = bootmem_bootmap_pages(total_pages);
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bootmem_paddr = lmb_alloc(bootmap_pages << PAGE_SHIFT, PAGE_SIZE);
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/*
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* Find a proper area for the bootmem bitmap. After this
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* bootstrap step all allocations (until the page allocator
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* is intact) must be done via bootmem_alloc().
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*/
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bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn,
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bootmap_size = init_bootmem_node(NODE_DATA(0),
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bootmem_paddr >> PAGE_SHIFT,
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min_low_pfn, max_low_pfn);
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__add_active_range(0, min_low_pfn, max_low_pfn);
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/* Add active regions with valid PFNs. */
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for (i = 0; i < lmb.memory.cnt; i++) {
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unsigned long start_pfn, end_pfn;
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start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT;
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end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i);
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__add_active_range(0, start_pfn, end_pfn);
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}
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/*
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* Add all physical memory to the bootmem map and mark each
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* area as present.
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*/
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register_bootmem_low_pages();
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/* Reserve the sections we're already using. */
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for (i = 0; i < lmb.reserved.cnt; i++)
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reserve_bootmem(lmb.reserved.region[i].base,
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lmb_size_bytes(&lmb.reserved, i),
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BOOTMEM_DEFAULT);
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node_set_online(0);
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/*
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* Reserve the kernel text and
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* Reserve the bootmem bitmap. We do this in two steps (first step
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* was init_bootmem()), because this catches the (definitely buggy)
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* case of us accidentally initializing the bootmem allocator with
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* an invalid RAM area.
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*/
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reserve_bootmem(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
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(PFN_PHYS(free_pfn) + bootmap_size + PAGE_SIZE - 1) -
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(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET),
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BOOTMEM_DEFAULT);
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/*
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* Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
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*/
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if (CONFIG_ZERO_PAGE_OFFSET != 0)
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reserve_bootmem(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET,
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BOOTMEM_DEFAULT);
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sparse_memory_present_with_active_regions(0);
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#ifdef CONFIG_BLK_DEV_INITRD
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@ -296,12 +303,37 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
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static void __init setup_memory(void)
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{
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unsigned long start_pfn;
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u64 base = min_low_pfn << PAGE_SHIFT;
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u64 size = (max_low_pfn << PAGE_SHIFT) - base;
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/*
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* Partially used pages are not usable - thus
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* we are rounding upwards:
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*/
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start_pfn = PFN_UP(__pa(_end));
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lmb_add(base, size);
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/*
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* Reserve the kernel text and
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* Reserve the bootmem bitmap. We do this in two steps (first step
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* was init_bootmem()), because this catches the (definitely buggy)
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* case of us accidentally initializing the bootmem allocator with
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* an invalid RAM area.
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*/
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lmb_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
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(PFN_PHYS(start_pfn) + PAGE_SIZE - 1) -
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(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET));
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/*
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* Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
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*/
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if (CONFIG_ZERO_PAGE_OFFSET != 0)
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lmb_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET);
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lmb_analyze();
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lmb_dump_all();
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setup_bootmem_allocator(start_pfn);
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}
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#else
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@ -402,6 +434,7 @@ void __init setup_arch(char **cmdline_p)
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nodes_clear(node_online_map);
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/* Setup bootmem with available RAM */
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lmb_init();
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setup_memory();
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sparse_init();
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