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powerpc: Merge lmb.c and make MM initialization use it.
This also creates merged versions of do_init_bootmem, paging_init and mem_init and moves them to arch/powerpc/mm/mem.c. It gets rid of the mem_pieces stuff. I made memory_limit a parameter to lmb_enforce_memory_limit rather than a global referenced by that function. This will require some small changes to ppc64 if we want to continue building ARCH=ppc64 using the merged lmb.c. Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Paul Mackerras
parent
9b6b563c0d
commit
7c8c6b9776
@ -2,9 +2,9 @@
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# Makefile for the linux ppc-specific parts of the memory manager.
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#
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obj-y := fault.o mem.o
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obj-y := fault.o mem.o lmb.o
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obj-$(CONFIG_PPC32) += init.o pgtable.o mmu_context.o \
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mem_pieces.o tlb.o
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tlb.o
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obj-$(CONFIG_PPC64) += init64.o pgtable64.o mmu_context64.o
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obj-$(CONFIG_PPC_STD_MMU_32) += ppc_mmu.o hash_32.o
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obj-$(CONFIG_40x) += 4xx_mmu.o
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@ -45,8 +45,9 @@
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#include <asm/tlb.h>
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#include <asm/bootinfo.h>
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#include <asm/prom.h>
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#include <asm/lmb.h>
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#include <asm/sections.h>
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#include "mem_pieces.h"
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#include "mmu_decl.h"
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#if defined(CONFIG_KERNEL_START_BOOL) || defined(CONFIG_LOWMEM_SIZE_BOOL)
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@ -65,17 +66,11 @@ unsigned long total_lowmem;
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unsigned long ppc_memstart;
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unsigned long ppc_memoffset = PAGE_OFFSET;
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int mem_init_done;
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int init_bootmem_done;
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int boot_mapsize;
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#ifdef CONFIG_PPC_PMAC
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unsigned long agp_special_page;
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#endif
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extern char _end[];
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extern char etext[], _stext[];
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extern char __init_begin, __init_end;
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#ifdef CONFIG_HIGHMEM
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pte_t *kmap_pte;
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pgprot_t kmap_prot;
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@ -85,15 +80,15 @@ EXPORT_SYMBOL(kmap_pte);
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#endif
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void MMU_init(void);
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void set_phys_avail(unsigned long total_ram);
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/* XXX should be in current.h -- paulus */
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extern struct task_struct *current_set[NR_CPUS];
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char *klimit = _end;
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struct mem_pieces phys_avail;
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struct device_node *memory_node;
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extern int init_bootmem_done;
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/*
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* this tells the system to map all of ram with the segregs
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* (i.e. page tables) instead of the bats.
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@ -102,84 +97,14 @@ struct device_node *memory_node;
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int __map_without_bats;
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int __map_without_ltlbs;
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/* max amount of RAM to use */
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unsigned long __max_memory;
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/* max amount of low RAM to map in */
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unsigned long __max_low_memory = MAX_LOW_MEM;
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/*
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* Read in a property describing some pieces of memory.
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* limit of what is accessible with initial MMU setup -
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* 256MB usually, but only 16MB on 601.
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*/
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static int __init get_mem_prop(char *name, struct mem_pieces *mp)
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{
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struct reg_property *rp;
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int i, s;
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unsigned int *ip;
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int nac = prom_n_addr_cells(memory_node);
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int nsc = prom_n_size_cells(memory_node);
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ip = (unsigned int *) get_property(memory_node, name, &s);
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if (ip == NULL) {
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printk(KERN_ERR "error: couldn't get %s property on /memory\n",
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name);
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return 0;
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}
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s /= (nsc + nac) * 4;
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rp = mp->regions;
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for (i = 0; i < s; ++i, ip += nac+nsc) {
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if (nac >= 2 && ip[nac-2] != 0)
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continue;
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rp->address = ip[nac-1];
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if (nsc >= 2 && ip[nac+nsc-2] != 0)
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rp->size = ~0U;
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else
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rp->size = ip[nac+nsc-1];
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++rp;
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}
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mp->n_regions = rp - mp->regions;
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/* Make sure the pieces are sorted. */
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mem_pieces_sort(mp);
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mem_pieces_coalesce(mp);
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return 1;
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}
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/*
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* Collect information about physical RAM and which pieces are
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* already in use from the device tree.
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*/
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unsigned long __init find_end_of_memory(void)
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{
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unsigned long a, total;
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struct mem_pieces phys_mem;
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/*
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* Find out where physical memory is, and check that it
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* starts at 0 and is contiguous. It seems that RAM is
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* always physically contiguous on Power Macintoshes.
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*
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* Supporting discontiguous physical memory isn't hard,
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* it just makes the virtual <-> physical mapping functions
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* more complicated (or else you end up wasting space
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* in mem_map).
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*/
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memory_node = find_devices("memory");
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if (memory_node == NULL || !get_mem_prop("reg", &phys_mem)
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|| phys_mem.n_regions == 0)
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panic("No RAM??");
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a = phys_mem.regions[0].address;
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if (a != 0)
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panic("RAM doesn't start at physical address 0");
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total = phys_mem.regions[0].size;
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if (phys_mem.n_regions > 1) {
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printk("RAM starting at 0x%x is not contiguous\n",
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phys_mem.regions[1].address);
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printk("Using RAM from 0 to 0x%lx\n", total-1);
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}
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return total;
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}
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unsigned long __initial_memory_limit = 0x10000000;
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/*
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* Check for command-line options that affect what MMU_init will do.
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@ -194,27 +119,6 @@ void MMU_setup(void)
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if (strstr(cmd_line, "noltlbs")) {
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__map_without_ltlbs = 1;
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}
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/* Look for mem= option on command line */
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if (strstr(cmd_line, "mem=")) {
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char *p, *q;
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unsigned long maxmem = 0;
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for (q = cmd_line; (p = strstr(q, "mem=")) != 0; ) {
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q = p + 4;
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if (p > cmd_line && p[-1] != ' ')
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continue;
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maxmem = simple_strtoul(q, &q, 0);
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if (*q == 'k' || *q == 'K') {
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maxmem <<= 10;
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++q;
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} else if (*q == 'm' || *q == 'M') {
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maxmem <<= 20;
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++q;
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}
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}
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__max_memory = maxmem;
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}
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}
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/*
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@ -227,23 +131,22 @@ void __init MMU_init(void)
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if (ppc_md.progress)
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ppc_md.progress("MMU:enter", 0x111);
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/* 601 can only access 16MB at the moment */
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if (PVR_VER(mfspr(SPRN_PVR)) == 1)
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__initial_memory_limit = 0x01000000;
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/* parse args from command line */
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MMU_setup();
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/*
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* Figure out how much memory we have, how much
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* is lowmem, and how much is highmem. If we were
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* passed the total memory size from the bootloader,
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* just use it.
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*/
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if (boot_mem_size)
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total_memory = boot_mem_size;
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else
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total_memory = find_end_of_memory();
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if (lmb.memory.cnt > 1) {
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lmb.memory.cnt = 1;
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lmb_analyze();
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printk(KERN_WARNING "Only using first contiguous memory region");
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}
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if (__max_memory && total_memory > __max_memory)
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total_memory = __max_memory;
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total_memory = lmb_end_of_DRAM();
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total_lowmem = total_memory;
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#ifdef CONFIG_FSL_BOOKE
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/* Freescale Book-E parts expect lowmem to be mapped by fixed TLB
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* entries, so we need to adjust lowmem to match the amount we can map
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@ -256,7 +159,6 @@ void __init MMU_init(void)
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total_memory = total_lowmem;
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#endif /* CONFIG_HIGHMEM */
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}
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set_phys_avail(total_lowmem);
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/* Initialize the MMU hardware */
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if (ppc_md.progress)
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@ -303,7 +205,8 @@ void __init *early_get_page(void)
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if (init_bootmem_done) {
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p = alloc_bootmem_pages(PAGE_SIZE);
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} else {
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p = mem_pieces_find(PAGE_SIZE, PAGE_SIZE);
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p = __va(lmb_alloc_base(PAGE_SIZE, PAGE_SIZE,
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__initial_memory_limit));
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}
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return p;
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}
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@ -353,229 +256,3 @@ void free_initrd_mem(unsigned long start, unsigned long end)
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}
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}
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#endif
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/*
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* Initialize the bootmem system and give it all the memory we
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* have available.
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*/
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void __init do_init_bootmem(void)
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{
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unsigned long start, size;
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int i;
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/*
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* Find an area to use for the bootmem bitmap.
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* We look for the first area which is at least
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* 128kB in length (128kB is enough for a bitmap
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* for 4GB of memory, using 4kB pages), plus 1 page
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* (in case the address isn't page-aligned).
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*/
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start = 0;
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size = 0;
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for (i = 0; i < phys_avail.n_regions; ++i) {
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unsigned long a = phys_avail.regions[i].address;
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unsigned long s = phys_avail.regions[i].size;
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if (s <= size)
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continue;
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start = a;
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size = s;
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if (s >= 33 * PAGE_SIZE)
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break;
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}
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start = PAGE_ALIGN(start);
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min_low_pfn = start >> PAGE_SHIFT;
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max_low_pfn = (PPC_MEMSTART + total_lowmem) >> PAGE_SHIFT;
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max_pfn = (PPC_MEMSTART + total_memory) >> PAGE_SHIFT;
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boot_mapsize = init_bootmem_node(&contig_page_data, min_low_pfn,
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PPC_MEMSTART >> PAGE_SHIFT,
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max_low_pfn);
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/* remove the bootmem bitmap from the available memory */
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mem_pieces_remove(&phys_avail, start, boot_mapsize, 1);
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/* add everything in phys_avail into the bootmem map */
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for (i = 0; i < phys_avail.n_regions; ++i)
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free_bootmem(phys_avail.regions[i].address,
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phys_avail.regions[i].size);
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init_bootmem_done = 1;
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}
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/*
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* paging_init() sets up the page tables - in fact we've already done this.
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*/
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void __init paging_init(void)
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{
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unsigned long zones_size[MAX_NR_ZONES], i;
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#ifdef CONFIG_HIGHMEM
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map_page(PKMAP_BASE, 0, 0); /* XXX gross */
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pkmap_page_table = pte_offset_kernel(pmd_offset(pgd_offset_k
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(PKMAP_BASE), PKMAP_BASE), PKMAP_BASE);
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map_page(KMAP_FIX_BEGIN, 0, 0); /* XXX gross */
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kmap_pte = pte_offset_kernel(pmd_offset(pgd_offset_k
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(KMAP_FIX_BEGIN), KMAP_FIX_BEGIN), KMAP_FIX_BEGIN);
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kmap_prot = PAGE_KERNEL;
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#endif /* CONFIG_HIGHMEM */
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/*
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* All pages are DMA-able so we put them all in the DMA zone.
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*/
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zones_size[ZONE_DMA] = total_lowmem >> PAGE_SHIFT;
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for (i = 1; i < MAX_NR_ZONES; i++)
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zones_size[i] = 0;
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#ifdef CONFIG_HIGHMEM
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zones_size[ZONE_HIGHMEM] = (total_memory - total_lowmem) >> PAGE_SHIFT;
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#endif /* CONFIG_HIGHMEM */
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free_area_init(zones_size);
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}
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void __init mem_init(void)
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{
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unsigned long addr;
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int codepages = 0;
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int datapages = 0;
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int initpages = 0;
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#ifdef CONFIG_HIGHMEM
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unsigned long highmem_mapnr;
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highmem_mapnr = total_lowmem >> PAGE_SHIFT;
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#endif /* CONFIG_HIGHMEM */
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max_mapnr = total_memory >> PAGE_SHIFT;
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high_memory = (void *) __va(PPC_MEMSTART + total_lowmem);
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num_physpages = max_mapnr; /* RAM is assumed contiguous */
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totalram_pages += free_all_bootmem();
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#ifdef CONFIG_BLK_DEV_INITRD
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/* if we are booted from BootX with an initial ramdisk,
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make sure the ramdisk pages aren't reserved. */
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if (initrd_start) {
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for (addr = initrd_start; addr < initrd_end; addr += PAGE_SIZE)
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ClearPageReserved(virt_to_page(addr));
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}
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#endif /* CONFIG_BLK_DEV_INITRD */
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#ifdef CONFIG_PPC_OF
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/* mark the RTAS pages as reserved */
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if ( rtas_data )
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for (addr = (ulong)__va(rtas_data);
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addr < PAGE_ALIGN((ulong)__va(rtas_data)+rtas_size) ;
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addr += PAGE_SIZE)
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SetPageReserved(virt_to_page(addr));
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#endif
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#ifdef CONFIG_PPC_PMAC
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if (agp_special_page)
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SetPageReserved(virt_to_page(agp_special_page));
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#endif
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for (addr = PAGE_OFFSET; addr < (unsigned long)high_memory;
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addr += PAGE_SIZE) {
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if (!PageReserved(virt_to_page(addr)))
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continue;
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if (addr < (ulong) etext)
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codepages++;
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else if (addr >= (unsigned long)&__init_begin
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&& addr < (unsigned long)&__init_end)
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initpages++;
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else if (addr < (ulong) klimit)
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datapages++;
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}
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#ifdef CONFIG_HIGHMEM
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{
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unsigned long pfn;
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for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) {
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struct page *page = mem_map + pfn;
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ClearPageReserved(page);
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set_page_count(page, 1);
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__free_page(page);
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totalhigh_pages++;
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}
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totalram_pages += totalhigh_pages;
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}
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#endif /* CONFIG_HIGHMEM */
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printk("Memory: %luk available (%dk kernel code, %dk data, %dk init, %ldk highmem)\n",
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(unsigned long)nr_free_pages()<< (PAGE_SHIFT-10),
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codepages<< (PAGE_SHIFT-10), datapages<< (PAGE_SHIFT-10),
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initpages<< (PAGE_SHIFT-10),
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(unsigned long) (totalhigh_pages << (PAGE_SHIFT-10)));
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#ifdef CONFIG_PPC_PMAC
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if (agp_special_page)
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printk(KERN_INFO "AGP special page: 0x%08lx\n", agp_special_page);
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#endif
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mem_init_done = 1;
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}
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/*
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* Set phys_avail to the amount of physical memory,
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* less the kernel text/data/bss.
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*/
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void __init
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set_phys_avail(unsigned long total_memory)
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{
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unsigned long kstart, ksize;
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/*
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* Initially, available physical memory is equivalent to all
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* physical memory.
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*/
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phys_avail.regions[0].address = PPC_MEMSTART;
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phys_avail.regions[0].size = total_memory;
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phys_avail.n_regions = 1;
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/*
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* Map out the kernel text/data/bss from the available physical
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* memory.
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*/
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kstart = __pa(_stext); /* should be 0 */
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ksize = PAGE_ALIGN(klimit - _stext);
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mem_pieces_remove(&phys_avail, kstart, ksize, 0);
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mem_pieces_remove(&phys_avail, 0, 0x4000, 0);
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#if defined(CONFIG_BLK_DEV_INITRD)
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/* Remove the init RAM disk from the available memory. */
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if (initrd_start) {
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mem_pieces_remove(&phys_avail, __pa(initrd_start),
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initrd_end - initrd_start, 1);
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}
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#endif /* CONFIG_BLK_DEV_INITRD */
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#ifdef CONFIG_PPC_OF
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/* remove the RTAS pages from the available memory */
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if (rtas_data)
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mem_pieces_remove(&phys_avail, rtas_data, rtas_size, 1);
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#endif
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#ifdef CONFIG_PPC_PMAC
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/* Because of some uninorth weirdness, we need a page of
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* memory as high as possible (it must be outside of the
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* bus address seen as the AGP aperture). It will be used
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* by the r128 DRM driver
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*
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* FIXME: We need to make sure that page doesn't overlap any of the\
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* above. This could be done by improving mem_pieces_find to be able
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* to do a backward search from the end of the list.
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*/
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if (_machine == _MACH_Pmac && find_devices("uni-north-agp")) {
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agp_special_page = (total_memory - PAGE_SIZE);
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mem_pieces_remove(&phys_avail, agp_special_page, PAGE_SIZE, 0);
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agp_special_page = (unsigned long)__va(agp_special_page);
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}
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#endif /* CONFIG_PPC_PMAC */
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}
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/* Mark some memory as reserved by removing it from phys_avail. */
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void __init reserve_phys_mem(unsigned long start, unsigned long size)
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{
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mem_pieces_remove(&phys_avail, start, size, 1);
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||||
}
|
||||
|
||||
@ -166,77 +166,6 @@ void free_initrd_mem(unsigned long start, unsigned long end)
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Initialize the bootmem system and give it all the memory we
|
||||
* have available.
|
||||
*/
|
||||
#ifndef CONFIG_NEED_MULTIPLE_NODES
|
||||
void __init do_init_bootmem(void)
|
||||
{
|
||||
unsigned long i;
|
||||
unsigned long start, bootmap_pages;
|
||||
unsigned long total_pages = lmb_end_of_DRAM() >> PAGE_SHIFT;
|
||||
int boot_mapsize;
|
||||
|
||||
/*
|
||||
* Find an area to use for the bootmem bitmap. Calculate the size of
|
||||
* bitmap required as (Total Memory) / PAGE_SIZE / BITS_PER_BYTE.
|
||||
* Add 1 additional page in case the address isn't page-aligned.
|
||||
*/
|
||||
bootmap_pages = bootmem_bootmap_pages(total_pages);
|
||||
|
||||
start = lmb_alloc(bootmap_pages<<PAGE_SHIFT, PAGE_SIZE);
|
||||
BUG_ON(!start);
|
||||
|
||||
boot_mapsize = init_bootmem(start >> PAGE_SHIFT, total_pages);
|
||||
|
||||
max_pfn = max_low_pfn;
|
||||
|
||||
/* Add all physical memory to the bootmem map, mark each area
|
||||
* present.
|
||||
*/
|
||||
for (i=0; i < lmb.memory.cnt; i++)
|
||||
free_bootmem(lmb.memory.region[i].base,
|
||||
lmb_size_bytes(&lmb.memory, i));
|
||||
|
||||
/* reserve the sections we're already using */
|
||||
for (i=0; i < lmb.reserved.cnt; i++)
|
||||
reserve_bootmem(lmb.reserved.region[i].base,
|
||||
lmb_size_bytes(&lmb.reserved, i));
|
||||
|
||||
for (i=0; i < lmb.memory.cnt; i++)
|
||||
memory_present(0, lmb_start_pfn(&lmb.memory, i),
|
||||
lmb_end_pfn(&lmb.memory, i));
|
||||
}
|
||||
|
||||
/*
|
||||
* paging_init() sets up the page tables - in fact we've already done this.
|
||||
*/
|
||||
void __init paging_init(void)
|
||||
{
|
||||
unsigned long zones_size[MAX_NR_ZONES];
|
||||
unsigned long zholes_size[MAX_NR_ZONES];
|
||||
unsigned long total_ram = lmb_phys_mem_size();
|
||||
unsigned long top_of_ram = lmb_end_of_DRAM();
|
||||
|
||||
printk(KERN_INFO "Top of RAM: 0x%lx, Total RAM: 0x%lx\n",
|
||||
top_of_ram, total_ram);
|
||||
printk(KERN_INFO "Memory hole size: %ldMB\n",
|
||||
(top_of_ram - total_ram) >> 20);
|
||||
/*
|
||||
* All pages are DMA-able so we put them all in the DMA zone.
|
||||
*/
|
||||
memset(zones_size, 0, sizeof(zones_size));
|
||||
memset(zholes_size, 0, sizeof(zholes_size));
|
||||
|
||||
zones_size[ZONE_DMA] = top_of_ram >> PAGE_SHIFT;
|
||||
zholes_size[ZONE_DMA] = (top_of_ram - total_ram) >> PAGE_SHIFT;
|
||||
|
||||
free_area_init_node(0, NODE_DATA(0), zones_size,
|
||||
__pa(PAGE_OFFSET) >> PAGE_SHIFT, zholes_size);
|
||||
}
|
||||
#endif /* ! CONFIG_NEED_MULTIPLE_NODES */
|
||||
|
||||
static struct kcore_list kcore_vmem;
|
||||
|
||||
static int __init setup_kcore(void)
|
||||
@ -264,61 +193,6 @@ static int __init setup_kcore(void)
|
||||
}
|
||||
module_init(setup_kcore);
|
||||
|
||||
void __init mem_init(void)
|
||||
{
|
||||
#ifdef CONFIG_NEED_MULTIPLE_NODES
|
||||
int nid;
|
||||
#endif
|
||||
pg_data_t *pgdat;
|
||||
unsigned long i;
|
||||
struct page *page;
|
||||
unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize;
|
||||
|
||||
num_physpages = max_low_pfn; /* RAM is assumed contiguous */
|
||||
high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
|
||||
|
||||
#ifdef CONFIG_NEED_MULTIPLE_NODES
|
||||
for_each_online_node(nid) {
|
||||
if (NODE_DATA(nid)->node_spanned_pages != 0) {
|
||||
printk("freeing bootmem node %x\n", nid);
|
||||
totalram_pages +=
|
||||
free_all_bootmem_node(NODE_DATA(nid));
|
||||
}
|
||||
}
|
||||
#else
|
||||
max_mapnr = num_physpages;
|
||||
totalram_pages += free_all_bootmem();
|
||||
#endif
|
||||
|
||||
for_each_pgdat(pgdat) {
|
||||
for (i = 0; i < pgdat->node_spanned_pages; i++) {
|
||||
page = pgdat_page_nr(pgdat, i);
|
||||
if (PageReserved(page))
|
||||
reservedpages++;
|
||||
}
|
||||
}
|
||||
|
||||
codesize = (unsigned long)&_etext - (unsigned long)&_stext;
|
||||
initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin;
|
||||
datasize = (unsigned long)&_edata - (unsigned long)&__init_end;
|
||||
bsssize = (unsigned long)&__bss_stop - (unsigned long)&__bss_start;
|
||||
|
||||
printk(KERN_INFO "Memory: %luk/%luk available (%luk kernel code, "
|
||||
"%luk reserved, %luk data, %luk bss, %luk init)\n",
|
||||
(unsigned long)nr_free_pages() << (PAGE_SHIFT-10),
|
||||
num_physpages << (PAGE_SHIFT-10),
|
||||
codesize >> 10,
|
||||
reservedpages << (PAGE_SHIFT-10),
|
||||
datasize >> 10,
|
||||
bsssize >> 10,
|
||||
initsize >> 10);
|
||||
|
||||
mem_init_done = 1;
|
||||
|
||||
/* Initialize the vDSO */
|
||||
vdso_init();
|
||||
}
|
||||
|
||||
void __iomem * reserve_phb_iospace(unsigned long size)
|
||||
{
|
||||
void __iomem *virt_addr;
|
||||
|
||||
296
arch/powerpc/mm/lmb.c
Normal file
296
arch/powerpc/mm/lmb.c
Normal file
@ -0,0 +1,296 @@
|
||||
/*
|
||||
* Procedures for maintaining information about logical memory blocks.
|
||||
*
|
||||
* Peter Bergner, IBM Corp. June 2001.
|
||||
* Copyright (C) 2001 Peter Bergner.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; either version
|
||||
* 2 of the License, or (at your option) any later version.
|
||||
*/
|
||||
|
||||
#include <linux/config.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/bitops.h>
|
||||
#include <asm/types.h>
|
||||
#include <asm/page.h>
|
||||
#include <asm/prom.h>
|
||||
#include <asm/lmb.h>
|
||||
#ifdef CONFIG_PPC32
|
||||
#include "mmu_decl.h" /* for __max_low_memory */
|
||||
#endif
|
||||
|
||||
struct lmb lmb;
|
||||
|
||||
#undef DEBUG
|
||||
|
||||
void lmb_dump_all(void)
|
||||
{
|
||||
#ifdef DEBUG
|
||||
unsigned long i;
|
||||
|
||||
udbg_printf("lmb_dump_all:\n");
|
||||
udbg_printf(" memory.cnt = 0x%lx\n",
|
||||
lmb.memory.cnt);
|
||||
udbg_printf(" memory.size = 0x%lx\n",
|
||||
lmb.memory.size);
|
||||
for (i=0; i < lmb.memory.cnt ;i++) {
|
||||
udbg_printf(" memory.region[0x%x].base = 0x%lx\n",
|
||||
i, lmb.memory.region[i].base);
|
||||
udbg_printf(" .size = 0x%lx\n",
|
||||
lmb.memory.region[i].size);
|
||||
}
|
||||
|
||||
udbg_printf("\n reserved.cnt = 0x%lx\n",
|
||||
lmb.reserved.cnt);
|
||||
udbg_printf(" reserved.size = 0x%lx\n",
|
||||
lmb.reserved.size);
|
||||
for (i=0; i < lmb.reserved.cnt ;i++) {
|
||||
udbg_printf(" reserved.region[0x%x].base = 0x%lx\n",
|
||||
i, lmb.reserved.region[i].base);
|
||||
udbg_printf(" .size = 0x%lx\n",
|
||||
lmb.reserved.region[i].size);
|
||||
}
|
||||
#endif /* DEBUG */
|
||||
}
|
||||
|
||||
static unsigned long __init lmb_addrs_overlap(unsigned long base1,
|
||||
unsigned long size1, unsigned long base2, unsigned long size2)
|
||||
{
|
||||
return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
|
||||
}
|
||||
|
||||
static long __init lmb_addrs_adjacent(unsigned long base1, unsigned long size1,
|
||||
unsigned long base2, unsigned long size2)
|
||||
{
|
||||
if (base2 == base1 + size1)
|
||||
return 1;
|
||||
else if (base1 == base2 + size2)
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static long __init lmb_regions_adjacent(struct lmb_region *rgn,
|
||||
unsigned long r1, unsigned long r2)
|
||||
{
|
||||
unsigned long base1 = rgn->region[r1].base;
|
||||
unsigned long size1 = rgn->region[r1].size;
|
||||
unsigned long base2 = rgn->region[r2].base;
|
||||
unsigned long size2 = rgn->region[r2].size;
|
||||
|
||||
return lmb_addrs_adjacent(base1, size1, base2, size2);
|
||||
}
|
||||
|
||||
/* Assumption: base addr of region 1 < base addr of region 2 */
|
||||
static void __init lmb_coalesce_regions(struct lmb_region *rgn,
|
||||
unsigned long r1, unsigned long r2)
|
||||
{
|
||||
unsigned long i;
|
||||
|
||||
rgn->region[r1].size += rgn->region[r2].size;
|
||||
for (i=r2; i < rgn->cnt-1; i++) {
|
||||
rgn->region[i].base = rgn->region[i+1].base;
|
||||
rgn->region[i].size = rgn->region[i+1].size;
|
||||
}
|
||||
rgn->cnt--;
|
||||
}
|
||||
|
||||
/* This routine called with relocation disabled. */
|
||||
void __init lmb_init(void)
|
||||
{
|
||||
/* Create a dummy zero size LMB which will get coalesced away later.
|
||||
* This simplifies the lmb_add() code below...
|
||||
*/
|
||||
lmb.memory.region[0].base = 0;
|
||||
lmb.memory.region[0].size = 0;
|
||||
lmb.memory.cnt = 1;
|
||||
|
||||
/* Ditto. */
|
||||
lmb.reserved.region[0].base = 0;
|
||||
lmb.reserved.region[0].size = 0;
|
||||
lmb.reserved.cnt = 1;
|
||||
}
|
||||
|
||||
/* This routine may be called with relocation disabled. */
|
||||
void __init lmb_analyze(void)
|
||||
{
|
||||
int i;
|
||||
|
||||
lmb.memory.size = 0;
|
||||
|
||||
for (i = 0; i < lmb.memory.cnt; i++)
|
||||
lmb.memory.size += lmb.memory.region[i].size;
|
||||
}
|
||||
|
||||
/* This routine called with relocation disabled. */
|
||||
static long __init lmb_add_region(struct lmb_region *rgn, unsigned long base,
|
||||
unsigned long size)
|
||||
{
|
||||
unsigned long i, coalesced = 0;
|
||||
long adjacent;
|
||||
|
||||
/* First try and coalesce this LMB with another. */
|
||||
for (i=0; i < rgn->cnt; i++) {
|
||||
unsigned long rgnbase = rgn->region[i].base;
|
||||
unsigned long rgnsize = rgn->region[i].size;
|
||||
|
||||
adjacent = lmb_addrs_adjacent(base,size,rgnbase,rgnsize);
|
||||
if ( adjacent > 0 ) {
|
||||
rgn->region[i].base -= size;
|
||||
rgn->region[i].size += size;
|
||||
coalesced++;
|
||||
break;
|
||||
}
|
||||
else if ( adjacent < 0 ) {
|
||||
rgn->region[i].size += size;
|
||||
coalesced++;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if ((i < rgn->cnt-1) && lmb_regions_adjacent(rgn, i, i+1) ) {
|
||||
lmb_coalesce_regions(rgn, i, i+1);
|
||||
coalesced++;
|
||||
}
|
||||
|
||||
if (coalesced)
|
||||
return coalesced;
|
||||
if (rgn->cnt >= MAX_LMB_REGIONS)
|
||||
return -1;
|
||||
|
||||
/* Couldn't coalesce the LMB, so add it to the sorted table. */
|
||||
for (i = rgn->cnt-1; i >= 0; i--) {
|
||||
if (base < rgn->region[i].base) {
|
||||
rgn->region[i+1].base = rgn->region[i].base;
|
||||
rgn->region[i+1].size = rgn->region[i].size;
|
||||
} else {
|
||||
rgn->region[i+1].base = base;
|
||||
rgn->region[i+1].size = size;
|
||||
break;
|
||||
}
|
||||
}
|
||||
rgn->cnt++;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* This routine may be called with relocation disabled. */
|
||||
long __init lmb_add(unsigned long base, unsigned long size)
|
||||
{
|
||||
struct lmb_region *_rgn = &(lmb.memory);
|
||||
|
||||
/* On pSeries LPAR systems, the first LMB is our RMO region. */
|
||||
if (base == 0)
|
||||
lmb.rmo_size = size;
|
||||
|
||||
return lmb_add_region(_rgn, base, size);
|
||||
|
||||
}
|
||||
|
||||
long __init lmb_reserve(unsigned long base, unsigned long size)
|
||||
{
|
||||
struct lmb_region *_rgn = &(lmb.reserved);
|
||||
|
||||
return lmb_add_region(_rgn, base, size);
|
||||
}
|
||||
|
||||
long __init lmb_overlaps_region(struct lmb_region *rgn, unsigned long base,
|
||||
unsigned long size)
|
||||
{
|
||||
unsigned long i;
|
||||
|
||||
for (i=0; i < rgn->cnt; i++) {
|
||||
unsigned long rgnbase = rgn->region[i].base;
|
||||
unsigned long rgnsize = rgn->region[i].size;
|
||||
if ( lmb_addrs_overlap(base,size,rgnbase,rgnsize) ) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return (i < rgn->cnt) ? i : -1;
|
||||
}
|
||||
|
||||
unsigned long __init lmb_alloc(unsigned long size, unsigned long align)
|
||||
{
|
||||
return lmb_alloc_base(size, align, LMB_ALLOC_ANYWHERE);
|
||||
}
|
||||
|
||||
unsigned long __init lmb_alloc_base(unsigned long size, unsigned long align,
|
||||
unsigned long max_addr)
|
||||
{
|
||||
long i, j;
|
||||
unsigned long base = 0;
|
||||
|
||||
#ifdef CONFIG_PPC32
|
||||
/* On 32-bit, make sure we allocate lowmem */
|
||||
if (max_addr == LMB_ALLOC_ANYWHERE)
|
||||
max_addr = __max_low_memory;
|
||||
#endif
|
||||
for (i = lmb.memory.cnt-1; i >= 0; i--) {
|
||||
unsigned long lmbbase = lmb.memory.region[i].base;
|
||||
unsigned long lmbsize = lmb.memory.region[i].size;
|
||||
|
||||
if (max_addr == LMB_ALLOC_ANYWHERE)
|
||||
base = _ALIGN_DOWN(lmbbase + lmbsize - size, align);
|
||||
else if (lmbbase < max_addr) {
|
||||
base = min(lmbbase + lmbsize, max_addr);
|
||||
base = _ALIGN_DOWN(base - size, align);
|
||||
} else
|
||||
continue;
|
||||
|
||||
while ((lmbbase <= base) &&
|
||||
((j = lmb_overlaps_region(&lmb.reserved, base, size)) >= 0) )
|
||||
base = _ALIGN_DOWN(lmb.reserved.region[j].base - size,
|
||||
align);
|
||||
|
||||
if ((base != 0) && (lmbbase <= base))
|
||||
break;
|
||||
}
|
||||
|
||||
if (i < 0)
|
||||
return 0;
|
||||
|
||||
lmb_add_region(&lmb.reserved, base, size);
|
||||
|
||||
return base;
|
||||
}
|
||||
|
||||
/* You must call lmb_analyze() before this. */
|
||||
unsigned long __init lmb_phys_mem_size(void)
|
||||
{
|
||||
return lmb.memory.size;
|
||||
}
|
||||
|
||||
unsigned long __init lmb_end_of_DRAM(void)
|
||||
{
|
||||
int idx = lmb.memory.cnt - 1;
|
||||
|
||||
return (lmb.memory.region[idx].base + lmb.memory.region[idx].size);
|
||||
}
|
||||
|
||||
/*
|
||||
* Truncate the lmb list to memory_limit if it's set
|
||||
* You must call lmb_analyze() after this.
|
||||
*/
|
||||
void __init lmb_enforce_memory_limit(unsigned long memory_limit)
|
||||
{
|
||||
unsigned long i, limit;
|
||||
|
||||
if (! memory_limit)
|
||||
return;
|
||||
|
||||
limit = memory_limit;
|
||||
for (i = 0; i < lmb.memory.cnt; i++) {
|
||||
if (limit > lmb.memory.region[i].size) {
|
||||
limit -= lmb.memory.region[i].size;
|
||||
continue;
|
||||
}
|
||||
|
||||
lmb.memory.region[i].size = limit;
|
||||
lmb.memory.cnt = i + 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
@ -45,8 +45,9 @@
|
||||
#include <asm/tlb.h>
|
||||
#include <asm/bootinfo.h>
|
||||
#include <asm/prom.h>
|
||||
#include <asm/lmb.h>
|
||||
#include <asm/sections.h>
|
||||
|
||||
#include "mem_pieces.h"
|
||||
#include "mmu_decl.h"
|
||||
|
||||
#ifndef CPU_FTR_COHERENT_ICACHE
|
||||
@ -54,6 +55,9 @@
|
||||
#define CPU_FTR_NOEXECUTE 0
|
||||
#endif
|
||||
|
||||
int init_bootmem_done;
|
||||
int mem_init_done;
|
||||
|
||||
/*
|
||||
* This is called by /dev/mem to know if a given address has to
|
||||
* be mapped non-cacheable or not
|
||||
@ -130,6 +134,185 @@ void show_mem(void)
|
||||
printk("%ld pages swap cached\n", cached);
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize the bootmem system and give it all the memory we
|
||||
* have available. If we are using highmem, we only put the
|
||||
* lowmem into the bootmem system.
|
||||
*/
|
||||
#ifndef CONFIG_NEED_MULTIPLE_NODES
|
||||
void __init do_init_bootmem(void)
|
||||
{
|
||||
unsigned long i;
|
||||
unsigned long start, bootmap_pages;
|
||||
unsigned long total_pages;
|
||||
int boot_mapsize;
|
||||
|
||||
max_pfn = total_pages = lmb_end_of_DRAM() >> PAGE_SHIFT;
|
||||
#ifdef CONFIG_HIGHMEM
|
||||
total_pages = total_lowmem >> PAGE_SHIFT;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Find an area to use for the bootmem bitmap. Calculate the size of
|
||||
* bitmap required as (Total Memory) / PAGE_SIZE / BITS_PER_BYTE.
|
||||
* Add 1 additional page in case the address isn't page-aligned.
|
||||
*/
|
||||
bootmap_pages = bootmem_bootmap_pages(total_pages);
|
||||
|
||||
start = lmb_alloc(bootmap_pages << PAGE_SHIFT, PAGE_SIZE);
|
||||
BUG_ON(!start);
|
||||
|
||||
boot_mapsize = init_bootmem(start >> PAGE_SHIFT, total_pages);
|
||||
|
||||
/* Add all physical memory to the bootmem map, mark each area
|
||||
* present.
|
||||
*/
|
||||
for (i = 0; i < lmb.memory.cnt; i++) {
|
||||
unsigned long base = lmb.memory.region[i].base;
|
||||
unsigned long size = lmb_size_bytes(&lmb.memory, i);
|
||||
#ifdef CONFIG_HIGHMEM
|
||||
if (base >= total_lowmem)
|
||||
continue;
|
||||
if (base + size > total_lowmem)
|
||||
size = total_lowmem - base;
|
||||
#endif
|
||||
free_bootmem(base, size);
|
||||
}
|
||||
|
||||
/* reserve the sections we're already using */
|
||||
for (i = 0; i < lmb.reserved.cnt; i++)
|
||||
reserve_bootmem(lmb.reserved.region[i].base,
|
||||
lmb_size_bytes(&lmb.reserved, i));
|
||||
|
||||
/* XXX need to clip this if using highmem? */
|
||||
for (i = 0; i < lmb.memory.cnt; i++)
|
||||
memory_present(0, lmb_start_pfn(&lmb.memory, i),
|
||||
lmb_end_pfn(&lmb.memory, i));
|
||||
init_bootmem_done = 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* paging_init() sets up the page tables - in fact we've already done this.
|
||||
*/
|
||||
void __init paging_init(void)
|
||||
{
|
||||
unsigned long zones_size[MAX_NR_ZONES];
|
||||
unsigned long zholes_size[MAX_NR_ZONES];
|
||||
unsigned long total_ram = lmb_phys_mem_size();
|
||||
unsigned long top_of_ram = lmb_end_of_DRAM();
|
||||
|
||||
#ifdef CONFIG_HIGHMEM
|
||||
map_page(PKMAP_BASE, 0, 0); /* XXX gross */
|
||||
pkmap_page_table = pte_offset_kernel(pmd_offset(pgd_offset_k
|
||||
(PKMAP_BASE), PKMAP_BASE), PKMAP_BASE);
|
||||
map_page(KMAP_FIX_BEGIN, 0, 0); /* XXX gross */
|
||||
kmap_pte = pte_offset_kernel(pmd_offset(pgd_offset_k
|
||||
(KMAP_FIX_BEGIN), KMAP_FIX_BEGIN), KMAP_FIX_BEGIN);
|
||||
kmap_prot = PAGE_KERNEL;
|
||||
#endif /* CONFIG_HIGHMEM */
|
||||
|
||||
printk(KERN_INFO "Top of RAM: 0x%lx, Total RAM: 0x%lx\n",
|
||||
top_of_ram, total_ram);
|
||||
printk(KERN_INFO "Memory hole size: %ldMB\n",
|
||||
(top_of_ram - total_ram) >> 20);
|
||||
/*
|
||||
* All pages are DMA-able so we put them all in the DMA zone.
|
||||
*/
|
||||
memset(zones_size, 0, sizeof(zones_size));
|
||||
memset(zholes_size, 0, sizeof(zholes_size));
|
||||
|
||||
zones_size[ZONE_DMA] = top_of_ram >> PAGE_SHIFT;
|
||||
zholes_size[ZONE_DMA] = (top_of_ram - total_ram) >> PAGE_SHIFT;
|
||||
|
||||
#ifdef CONFIG_HIGHMEM
|
||||
zones_size[ZONE_DMA] = total_lowmem >> PAGE_SHIFT;
|
||||
zones_size[ZONE_HIGHMEM] = (total_memory - total_lowmem) >> PAGE_SHIFT;
|
||||
zholes_size[ZONE_HIGHMEM] = (top_of_ram - total_ram) >> PAGE_SHIFT;
|
||||
#else
|
||||
zones_size[ZONE_DMA] = top_of_ram >> PAGE_SHIFT;
|
||||
zholes_size[ZONE_DMA] = (top_of_ram - total_ram) >> PAGE_SHIFT;
|
||||
#endif /* CONFIG_HIGHMEM */
|
||||
|
||||
free_area_init_node(0, NODE_DATA(0), zones_size,
|
||||
__pa(PAGE_OFFSET) >> PAGE_SHIFT, zholes_size);
|
||||
}
|
||||
#endif /* ! CONFIG_NEED_MULTIPLE_NODES */
|
||||
|
||||
void __init mem_init(void)
|
||||
{
|
||||
#ifdef CONFIG_NEED_MULTIPLE_NODES
|
||||
int nid;
|
||||
#endif
|
||||
pg_data_t *pgdat;
|
||||
unsigned long i;
|
||||
struct page *page;
|
||||
unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize;
|
||||
|
||||
num_physpages = max_pfn; /* RAM is assumed contiguous */
|
||||
high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
|
||||
|
||||
#ifdef CONFIG_NEED_MULTIPLE_NODES
|
||||
for_each_online_node(nid) {
|
||||
if (NODE_DATA(nid)->node_spanned_pages != 0) {
|
||||
printk("freeing bootmem node %x\n", nid);
|
||||
totalram_pages +=
|
||||
free_all_bootmem_node(NODE_DATA(nid));
|
||||
}
|
||||
}
|
||||
#else
|
||||
max_mapnr = num_physpages;
|
||||
totalram_pages += free_all_bootmem();
|
||||
#endif
|
||||
for_each_pgdat(pgdat) {
|
||||
for (i = 0; i < pgdat->node_spanned_pages; i++) {
|
||||
page = pgdat_page_nr(pgdat, i);
|
||||
if (PageReserved(page))
|
||||
reservedpages++;
|
||||
}
|
||||
}
|
||||
|
||||
codesize = (unsigned long)&_sdata - (unsigned long)&_stext;
|
||||
datasize = (unsigned long)&__init_begin - (unsigned long)&_sdata;
|
||||
initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin;
|
||||
bsssize = (unsigned long)&__bss_stop - (unsigned long)&__bss_start;
|
||||
|
||||
#ifdef CONFIG_HIGHMEM
|
||||
{
|
||||
unsigned long pfn, highmem_mapnr;
|
||||
|
||||
highmem_mapnr = total_lowmem >> PAGE_SHIFT;
|
||||
for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) {
|
||||
struct page *page = pfn_to_page(pfn);
|
||||
|
||||
ClearPageReserved(page);
|
||||
set_page_count(page, 1);
|
||||
__free_page(page);
|
||||
totalhigh_pages++;
|
||||
}
|
||||
totalram_pages += totalhigh_pages;
|
||||
printk(KERN_INFO "High memory: %luk\n",
|
||||
totalhigh_pages << (PAGE_SHIFT-10));
|
||||
}
|
||||
#endif /* CONFIG_HIGHMEM */
|
||||
|
||||
printk(KERN_INFO "Memory: %luk/%luk available (%luk kernel code, "
|
||||
"%luk reserved, %luk data, %luk bss, %luk init)\n",
|
||||
(unsigned long)nr_free_pages() << (PAGE_SHIFT-10),
|
||||
num_physpages << (PAGE_SHIFT-10),
|
||||
codesize >> 10,
|
||||
reservedpages << (PAGE_SHIFT-10),
|
||||
datasize >> 10,
|
||||
bsssize >> 10,
|
||||
initsize >> 10);
|
||||
|
||||
mem_init_done = 1;
|
||||
|
||||
#ifdef CONFIG_PPC64
|
||||
/* Initialize the vDSO */
|
||||
vdso_init();
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
* This is called when a page has been modified by the kernel.
|
||||
* It just marks the page as not i-cache clean. We do the i-cache
|
||||
|
||||
@ -1,163 +0,0 @@
|
||||
/*
|
||||
* Copyright (c) 1996 Paul Mackerras <paulus@cs.anu.edu.au>
|
||||
* Changes to accommodate Power Macintoshes.
|
||||
* Cort Dougan <cort@cs.nmt.edu>
|
||||
* Rewrites.
|
||||
* Grant Erickson <grant@lcse.umn.edu>
|
||||
* General rework and split from mm/init.c.
|
||||
*
|
||||
* Module name: mem_pieces.c
|
||||
*
|
||||
* Description:
|
||||
* Routines and data structures for manipulating and representing
|
||||
* phyiscal memory extents (i.e. address/length pairs).
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/config.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/stddef.h>
|
||||
#include <linux/init.h>
|
||||
#include <asm/page.h>
|
||||
|
||||
#include "mem_pieces.h"
|
||||
|
||||
extern struct mem_pieces phys_avail;
|
||||
|
||||
static void mem_pieces_print(struct mem_pieces *);
|
||||
|
||||
/*
|
||||
* Scan a region for a piece of a given size with the required alignment.
|
||||
*/
|
||||
void __init *
|
||||
mem_pieces_find(unsigned int size, unsigned int align)
|
||||
{
|
||||
int i;
|
||||
unsigned a, e;
|
||||
struct mem_pieces *mp = &phys_avail;
|
||||
|
||||
for (i = 0; i < mp->n_regions; ++i) {
|
||||
a = mp->regions[i].address;
|
||||
e = a + mp->regions[i].size;
|
||||
a = (a + align - 1) & -align;
|
||||
if (a + size <= e) {
|
||||
mem_pieces_remove(mp, a, size, 1);
|
||||
return (void *) __va(a);
|
||||
}
|
||||
}
|
||||
panic("Couldn't find %u bytes at %u alignment\n", size, align);
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Remove some memory from an array of pieces
|
||||
*/
|
||||
void __init
|
||||
mem_pieces_remove(struct mem_pieces *mp, unsigned int start, unsigned int size,
|
||||
int must_exist)
|
||||
{
|
||||
int i, j;
|
||||
unsigned int end, rs, re;
|
||||
struct reg_property *rp;
|
||||
|
||||
end = start + size;
|
||||
for (i = 0, rp = mp->regions; i < mp->n_regions; ++i, ++rp) {
|
||||
if (end > rp->address && start < rp->address + rp->size)
|
||||
break;
|
||||
}
|
||||
if (i >= mp->n_regions) {
|
||||
if (must_exist)
|
||||
printk("mem_pieces_remove: [%x,%x) not in any region\n",
|
||||
start, end);
|
||||
return;
|
||||
}
|
||||
for (; i < mp->n_regions && end > rp->address; ++i, ++rp) {
|
||||
rs = rp->address;
|
||||
re = rs + rp->size;
|
||||
if (must_exist && (start < rs || end > re)) {
|
||||
printk("mem_pieces_remove: bad overlap [%x,%x) with",
|
||||
start, end);
|
||||
mem_pieces_print(mp);
|
||||
must_exist = 0;
|
||||
}
|
||||
if (start > rs) {
|
||||
rp->size = start - rs;
|
||||
if (end < re) {
|
||||
/* need to split this entry */
|
||||
if (mp->n_regions >= MEM_PIECES_MAX)
|
||||
panic("eek... mem_pieces overflow");
|
||||
for (j = mp->n_regions; j > i + 1; --j)
|
||||
mp->regions[j] = mp->regions[j-1];
|
||||
++mp->n_regions;
|
||||
rp[1].address = end;
|
||||
rp[1].size = re - end;
|
||||
}
|
||||
} else {
|
||||
if (end < re) {
|
||||
rp->address = end;
|
||||
rp->size = re - end;
|
||||
} else {
|
||||
/* need to delete this entry */
|
||||
for (j = i; j < mp->n_regions - 1; ++j)
|
||||
mp->regions[j] = mp->regions[j+1];
|
||||
--mp->n_regions;
|
||||
--i;
|
||||
--rp;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void __init
|
||||
mem_pieces_print(struct mem_pieces *mp)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < mp->n_regions; ++i)
|
||||
printk(" [%x, %x)", mp->regions[i].address,
|
||||
mp->regions[i].address + mp->regions[i].size);
|
||||
printk("\n");
|
||||
}
|
||||
|
||||
void __init
|
||||
mem_pieces_sort(struct mem_pieces *mp)
|
||||
{
|
||||
unsigned long a, s;
|
||||
int i, j;
|
||||
|
||||
for (i = 1; i < mp->n_regions; ++i) {
|
||||
a = mp->regions[i].address;
|
||||
s = mp->regions[i].size;
|
||||
for (j = i - 1; j >= 0; --j) {
|
||||
if (a >= mp->regions[j].address)
|
||||
break;
|
||||
mp->regions[j+1] = mp->regions[j];
|
||||
}
|
||||
mp->regions[j+1].address = a;
|
||||
mp->regions[j+1].size = s;
|
||||
}
|
||||
}
|
||||
|
||||
void __init
|
||||
mem_pieces_coalesce(struct mem_pieces *mp)
|
||||
{
|
||||
unsigned long a, s, ns;
|
||||
int i, j, d;
|
||||
|
||||
d = 0;
|
||||
for (i = 0; i < mp->n_regions; i = j) {
|
||||
a = mp->regions[i].address;
|
||||
s = mp->regions[i].size;
|
||||
for (j = i + 1; j < mp->n_regions
|
||||
&& mp->regions[j].address - a <= s; ++j) {
|
||||
ns = mp->regions[j].address + mp->regions[j].size - a;
|
||||
if (ns > s)
|
||||
s = ns;
|
||||
}
|
||||
mp->regions[d].address = a;
|
||||
mp->regions[d].size = s;
|
||||
++d;
|
||||
}
|
||||
mp->n_regions = d;
|
||||
}
|
||||
@ -1,48 +0,0 @@
|
||||
/*
|
||||
* Copyright (c) 1996 Paul Mackerras <paulus@cs.anu.edu.au>
|
||||
* Changes to accommodate Power Macintoshes.
|
||||
* Cort Dougan <cort@cs.nmt.edu>
|
||||
* Rewrites.
|
||||
* Grant Erickson <grant@lcse.umn.edu>
|
||||
* General rework and split from mm/init.c.
|
||||
*
|
||||
* Module name: mem_pieces.h
|
||||
*
|
||||
* Description:
|
||||
* Routines and data structures for manipulating and representing
|
||||
* phyiscal memory extents (i.e. address/length pairs).
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef __MEM_PIECES_H__
|
||||
#define __MEM_PIECES_H__
|
||||
|
||||
#include <asm/prom.h>
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
|
||||
/* Type Definitions */
|
||||
|
||||
#define MEM_PIECES_MAX 32
|
||||
|
||||
struct mem_pieces {
|
||||
int n_regions;
|
||||
struct reg_property regions[MEM_PIECES_MAX];
|
||||
};
|
||||
|
||||
/* Function Prototypes */
|
||||
|
||||
extern void *mem_pieces_find(unsigned int size, unsigned int align);
|
||||
extern void mem_pieces_remove(struct mem_pieces *mp, unsigned int start,
|
||||
unsigned int size, int must_exist);
|
||||
extern void mem_pieces_coalesce(struct mem_pieces *mp);
|
||||
extern void mem_pieces_sort(struct mem_pieces *mp);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* __MEM_PIECES_H__ */
|
||||
@ -36,6 +36,8 @@ extern unsigned long ioremap_base;
|
||||
extern unsigned long ioremap_bot;
|
||||
extern unsigned int rtas_data, rtas_size;
|
||||
|
||||
extern unsigned long __max_low_memory;
|
||||
extern unsigned long __initial_memory_limit;
|
||||
extern unsigned long total_memory;
|
||||
extern unsigned long total_lowmem;
|
||||
extern int mem_init_done;
|
||||
|
||||
@ -190,8 +190,7 @@ __ioremap(phys_addr_t addr, unsigned long size, unsigned long flags)
|
||||
* Don't allow anybody to remap normal RAM that we're using.
|
||||
* mem_init() sets high_memory so only do the check after that.
|
||||
*/
|
||||
if ( mem_init_done && (p < virt_to_phys(high_memory)) )
|
||||
{
|
||||
if (mem_init_done && (p < virt_to_phys(high_memory))) {
|
||||
printk("__ioremap(): phys addr "PHYS_FMT" is RAM lr %p\n", p,
|
||||
__builtin_return_address(0));
|
||||
return NULL;
|
||||
|
||||
@ -32,9 +32,9 @@
|
||||
#include <asm/prom.h>
|
||||
#include <asm/mmu.h>
|
||||
#include <asm/machdep.h>
|
||||
#include <asm/lmb.h>
|
||||
|
||||
#include "mmu_decl.h"
|
||||
#include "mem_pieces.h"
|
||||
|
||||
PTE *Hash, *Hash_end;
|
||||
unsigned long Hash_size, Hash_mask;
|
||||
@ -215,17 +215,6 @@ void __init MMU_init_hw(void)
|
||||
#define MIN_N_HPTEG 1024 /* min 64kB hash table */
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_POWER4
|
||||
/* The hash table has already been allocated and initialized
|
||||
in prom.c */
|
||||
n_hpteg = Hash_size >> LG_HPTEG_SIZE;
|
||||
lg_n_hpteg = __ilog2(n_hpteg);
|
||||
|
||||
/* Remove the hash table from the available memory */
|
||||
if (Hash)
|
||||
reserve_phys_mem(__pa(Hash), Hash_size);
|
||||
|
||||
#else /* CONFIG_POWER4 */
|
||||
/*
|
||||
* Allow 1 HPTE (1/8 HPTEG) for each page of memory.
|
||||
* This is less than the recommended amount, but then
|
||||
@ -245,10 +234,10 @@ void __init MMU_init_hw(void)
|
||||
* Find some memory for the hash table.
|
||||
*/
|
||||
if ( ppc_md.progress ) ppc_md.progress("hash:find piece", 0x322);
|
||||
Hash = mem_pieces_find(Hash_size, Hash_size);
|
||||
Hash = __va(lmb_alloc_base(Hash_size, Hash_size,
|
||||
__initial_memory_limit));
|
||||
cacheable_memzero(Hash, Hash_size);
|
||||
_SDR1 = __pa(Hash) | SDR1_LOW_BITS;
|
||||
#endif /* CONFIG_POWER4 */
|
||||
|
||||
Hash_end = (PTE *) ((unsigned long)Hash + Hash_size);
|
||||
|
||||
|
||||
@ -34,6 +34,17 @@ typedef unsigned long pte_basic_t;
|
||||
#define PTE_FMT "%.8lx"
|
||||
#endif
|
||||
|
||||
/* align addr on a size boundary - adjust address up/down if needed */
|
||||
#define _ALIGN_UP(addr,size) (((addr)+((size)-1))&(~((size)-1)))
|
||||
#define _ALIGN_DOWN(addr,size) ((addr)&(~((size)-1)))
|
||||
|
||||
/* align addr on a size boundary - adjust address up if needed */
|
||||
#define _ALIGN(addr,size) _ALIGN_UP(addr,size)
|
||||
|
||||
/* to align the pointer to the (next) page boundary */
|
||||
#define PAGE_ALIGN(addr) _ALIGN(addr, PAGE_SIZE)
|
||||
|
||||
|
||||
#undef STRICT_MM_TYPECHECKS
|
||||
|
||||
#ifdef STRICT_MM_TYPECHECKS
|
||||
@ -76,13 +87,6 @@ typedef unsigned long pgprot_t;
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
/* align addr on a size boundary - adjust address up if needed -- Cort */
|
||||
#define _ALIGN(addr,size) (((addr)+(size)-1)&(~((size)-1)))
|
||||
|
||||
/* to align the pointer to the (next) page boundary */
|
||||
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
|
||||
|
||||
struct page;
|
||||
extern void clear_pages(void *page, int order);
|
||||
static inline void clear_page(void *page) { clear_pages(page, 0); }
|
||||
|
||||
Loading…
Reference in New Issue
Block a user