ppc64: Use the merged lmb routines

The only real change here is that lmb_enforce_memory_limit now takes
the memory_limit as a parameter instead of as a global variable.

Signed-off-by: Paul Mackerras <paulus@samba.org>

3 files changed, 4 insertions, 302 deletions

diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index 2fdcc4b63d40..32fd3f1c7935 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -12,7 +12,7 @@ obj-y               :=	setup.o entry.o irq.o idle.o dma.o \
                         align.o semaphore.o bitops.o pacaData.o \
                         udbg.o binfmt_elf32.o sys_ppc32.o ioctl32.o \
                         ptrace32.o signal32.o rtc.o init_task.o \
-                        lmb.o cputable.o cpu_setup_power4.o \
+                        cputable.o cpu_setup_power4.o \
                         iommu.o sysfs.o vdso.o pmc.o firmware.o prom.o
 obj-y += vdso32/ vdso64/
 
diff --git a/arch/ppc64/kernel/lmb.c b/arch/ppc64/kernel/lmb.c
deleted file mode 100644
index 5adaca2ddc9d..000000000000
--- a/arch/ppc64/kernel/lmb.c
+++ /dev/null
@@ -1,299 +0,0 @@
-/*
- * Procedures for interfacing to Open Firmware.
- *
- * 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>
-#include <asm/abs_addr.h>
-
-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 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;
-        } else 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 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;
-
-        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 = _ALIGN_DOWN(min(lmbbase+lmbsize,max_addr)-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(void)
-{
-        extern 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;
-        }
-}
diff --git a/arch/ppc64/kernel/prom.c b/arch/ppc64/kernel/prom.c
index 7035deb6de92..a0866f12647f 100644
--- a/arch/ppc64/kernel/prom.c
+++ b/arch/ppc64/kernel/prom.c
@@ -78,6 +78,7 @@ typedef int interpret_func(struct device_node *, unsigned long *,
 extern struct rtas_t rtas;
 extern struct lmb lmb;
 extern unsigned long klimit;
+extern unsigned long memory_limit;
 
 static int __initdata dt_root_addr_cells;
 static int __initdata dt_root_size_cells;
@@ -1063,7 +1064,7 @@ static int __init early_init_dt_scan_chosen(unsigned long node,
 {
         u32 *prop;
         u64 *prop64;
-        extern unsigned long memory_limit, tce_alloc_start, tce_alloc_end;
+        extern unsigned long tce_alloc_start, tce_alloc_end;
 
         DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
 
@@ -1237,7 +1238,7 @@ void __init early_init_devtree(void *params)
         lmb_init();
         scan_flat_dt(early_init_dt_scan_root, NULL);
         scan_flat_dt(early_init_dt_scan_memory, NULL);
-        lmb_enforce_memory_limit();
+        lmb_enforce_memory_limit(memory_limit);
         lmb_analyze();
         systemcfg->physicalMemorySize = lmb_phys_mem_size();
         lmb_reserve(0, __pa(klimit));