m68k: switch to MEMBLOCK + NO_BOOTMEM

In m68k the physical memory is described by [memory_start, memory_end] for
!MMU variant and by m68k_memory array of memory ranges for the MMU version.
This information is directly use to register the physical memory with
memblock.

The reserve_bootmem() calls are replaced with memblock_reserve() and the
bootmap bitmap allocation is simply dropped.

Since the MMU variant creates early mappings only for the small part of the
memory we force bottom-up allocations in memblock.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 3f61327..b29f937 100644 (file)
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -26,6 +26,9 @@ config M68K
        select OLD_SIGSUSPEND3
        select OLD_SIGACTION
        select DMA_NONCOHERENT_OPS if HAS_DMA
+       select HAVE_MEMBLOCK
+       select ARCH_DISCARD_MEMBLOCK
+       select NO_BOOTMEM
 
 config CPU_BIG_ENDIAN
        def_bool y

diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
index 0724473..5d3596c 100644 (file)
--- a/arch/m68k/kernel/setup_mm.c
+++ b/arch/m68k/kernel/setup_mm.c
@@ -21,6 +21,7 @@
 #include <linux/string.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
+#include <linux/memblock.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/module.h>
@@ -164,6 +165,8 @@ static void __init m68k_parse_bootinfo(const struct bi_record *record)
                                        be32_to_cpu(m->addr);
                                m68k_memory[m68k_num_memory].size =
                                        be32_to_cpu(m->size);
+                               memblock_add(m68k_memory[m68k_num_memory].addr,
+                                            m68k_memory[m68k_num_memory].size);
                                m68k_num_memory++;
                        } else
                                pr_warn("%s: too many memory chunks\n",
@@ -223,10 +226,6 @@ static void __init m68k_parse_bootinfo(const struct bi_record *record)
 
 void __init setup_arch(char **cmdline_p)
 {
-#ifndef CONFIG_SUN3
-       int i;
-#endif
-
        /* The bootinfo is located right after the kernel */
        if (!CPU_IS_COLDFIRE)
                m68k_parse_bootinfo((const struct bi_record *)_end);
@@ -355,14 +354,9 @@ void __init setup_arch(char **cmdline_p)
 #endif
 
 #ifndef CONFIG_SUN3
-       for (i = 1; i < m68k_num_memory; i++)
-               free_bootmem_node(NODE_DATA(i), m68k_memory[i].addr,
-                                 m68k_memory[i].size);
 #ifdef CONFIG_BLK_DEV_INITRD
        if (m68k_ramdisk.size) {
-               reserve_bootmem_node(__virt_to_node(phys_to_virt(m68k_ramdisk.addr)),
-                                    m68k_ramdisk.addr, m68k_ramdisk.size,
-                                    BOOTMEM_DEFAULT);
+               memblock_reserve(m68k_ramdisk.addr, m68k_ramdisk.size);
                initrd_start = (unsigned long)phys_to_virt(m68k_ramdisk.addr);
                initrd_end = initrd_start + m68k_ramdisk.size;
                pr_info("initrd: %08lx - %08lx\n", initrd_start, initrd_end);

diff --git a/arch/m68k/kernel/setup_no.c b/arch/m68k/kernel/setup_no.c
index 3c53e4c..cfd5475 100644 (file)
--- a/arch/m68k/kernel/setup_no.c
+++ b/arch/m68k/kernel/setup_no.c
@@ -28,6 +28,7 @@
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/bootmem.h>
+#include <linux/memblock.h>
 #include <linux/seq_file.h>
 #include <linux/init.h>
 #include <linux/initrd.h>
@@ -85,8 +86,6 @@ void (*mach_power_off)(void);
 
 void __init setup_arch(char **cmdline_p)
 {
-       int bootmap_size;
-
        memory_start = PAGE_ALIGN(_ramstart);
        memory_end = _ramend;
 
@@ -141,6 +140,8 @@ void __init setup_arch(char **cmdline_p)
        pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
                 __bss_stop, memory_start, memory_start, memory_end);
 
+       memblock_add(memory_start, memory_end - memory_start);
+
        /* Keep a copy of command line */
        *cmdline_p = &command_line[0];
        memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
@@ -157,23 +158,10 @@ void __init setup_arch(char **cmdline_p)
        min_low_pfn = PFN_DOWN(memory_start);
        max_pfn = max_low_pfn = PFN_DOWN(memory_end);
 
-       bootmap_size = init_bootmem_node(
-                       NODE_DATA(0),
-                       min_low_pfn,            /* map goes here */
-                       PFN_DOWN(PAGE_OFFSET),
-                       max_pfn);
-       /*
-        * Free the usable memory, we have to make sure we do not free
-        * the bootmem bitmap so we then reserve it after freeing it :-)
-        */
-       free_bootmem(memory_start, memory_end - memory_start);
-       reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
-
 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
        if ((initrd_start > 0) && (initrd_start < initrd_end) &&
                        (initrd_end < memory_end))
-               reserve_bootmem(initrd_start, initrd_end - initrd_start,
-                                BOOTMEM_DEFAULT);
+               memblock_reserve(initrd_start, initrd_end - initrd_start);
 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 
        /*

diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c
index 8827b7f..38e2b27 100644 (file)
--- a/arch/m68k/mm/init.c
+++ b/arch/m68k/mm/init.c
@@ -71,7 +71,6 @@ void __init m68k_setup_node(int node)
                pg_data_table[i] = pg_data_map + node;
        }
 #endif
-       pg_data_map[node].bdata = bootmem_node_data + node;
        node_set_online(node);
 }
 

diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c
index 2925d79..70dde04 100644 (file)
--- a/arch/m68k/mm/mcfmmu.c
+++ b/arch/m68k/mm/mcfmmu.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/string.h>
 #include <linux/bootmem.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/page.h>
@@ -153,31 +154,31 @@ int cf_tlb_miss(struct pt_regs *regs, int write, int dtlb, int extension_word)
 
 void __init cf_bootmem_alloc(void)
 {
-       unsigned long start_pfn;
        unsigned long memstart;
 
        /* _rambase and _ramend will be naturally page aligned */
        m68k_memory[0].addr = _rambase;
        m68k_memory[0].size = _ramend - _rambase;
 
+       memblock_add(m68k_memory[0].addr, m68k_memory[0].size);
+
        /* compute total pages in system */
        num_pages = PFN_DOWN(_ramend - _rambase);
 
        /* page numbers */
        memstart = PAGE_ALIGN(_ramstart);
        min_low_pfn = PFN_DOWN(_rambase);
-       start_pfn = PFN_DOWN(memstart);
        max_pfn = max_low_pfn = PFN_DOWN(_ramend);
        high_memory = (void *)_ramend;
 
+       /* Reserve kernel text/data/bss */
+       memblock_reserve(memstart, memstart - _rambase);
+
        m68k_virt_to_node_shift = fls(_ramend - 1) - 6;
        module_fixup(NULL, __start_fixup, __stop_fixup);
 
-       /* setup bootmem data */
+       /* setup node data */
        m68k_setup_node(0);
-       memstart += init_bootmem_node(NODE_DATA(0), start_pfn,
-               min_low_pfn, max_low_pfn);
-       free_bootmem_node(NODE_DATA(0), memstart, _ramend - memstart);
 }
 
 /*

diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index e490ecc..4e17ecb 100644 (file)
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -19,6 +19,7 @@
 #include <linux/types.h>
 #include <linux/init.h>
 #include <linux/bootmem.h>
+#include <linux/memblock.h>
 #include <linux/gfp.h>
 
 #include <asm/setup.h>
@@ -208,7 +209,7 @@ void __init paging_init(void)
 {
        unsigned long zones_size[MAX_NR_ZONES] = { 0, };
        unsigned long min_addr, max_addr;
-       unsigned long addr, size, end;
+       unsigned long addr;
        int i;
 
 #ifdef DEBUG
@@ -253,34 +254,20 @@ void __init paging_init(void)
        min_low_pfn = availmem >> PAGE_SHIFT;
        max_pfn = max_low_pfn = max_addr >> PAGE_SHIFT;
 
-       for (i = 0; i < m68k_num_memory; i++) {
-               addr = m68k_memory[i].addr;
-               end = addr + m68k_memory[i].size;
-               m68k_setup_node(i);
-               availmem = PAGE_ALIGN(availmem);
-               availmem += init_bootmem_node(NODE_DATA(i),
-                                             availmem >> PAGE_SHIFT,
-                                             addr >> PAGE_SHIFT,
-                                             end >> PAGE_SHIFT);
-       }
+       /* Reserve kernel text/data/bss and the memory allocated in head.S */
+       memblock_reserve(m68k_memory[0].addr, availmem - m68k_memory[0].addr);
 
        /*
         * Map the physical memory available into the kernel virtual
-        * address space. First initialize the bootmem allocator with
-        * the memory we already mapped, so map_node() has something
-        * to allocate.
+        * address space. Make sure memblock will not try to allocate
+        * pages beyond the memory we already mapped in head.S
         */
-       addr = m68k_memory[0].addr;
-       size = m68k_memory[0].size;
-       free_bootmem_node(NODE_DATA(0), availmem,
-                         min(m68k_init_mapped_size, size) - (availmem - addr));
-       map_node(0);
-       if (size > m68k_init_mapped_size)
-               free_bootmem_node(NODE_DATA(0), addr + m68k_init_mapped_size,
-                                 size - m68k_init_mapped_size);
-
-       for (i = 1; i < m68k_num_memory; i++)
+       memblock_set_bottom_up(true);
+
+       for (i = 0; i < m68k_num_memory; i++) {
+               m68k_setup_node(i);
                map_node(i);
+       }
 
        flush_tlb_all();
 

diff --git a/arch/m68k/sun3/config.c b/arch/m68k/sun3/config.c
index 1d28d38..79a2bb8 100644 (file)
--- a/arch/m68k/sun3/config.c
+++ b/arch/m68k/sun3/config.c
@@ -123,10 +123,6 @@ static void __init sun3_bootmem_alloc(unsigned long memory_start,
        availmem = memory_start;
 
        m68k_setup_node(0);
-       availmem += init_bootmem(start_page, num_pages);
-       availmem = (availmem + (PAGE_SIZE-1)) & PAGE_MASK;
-
-       free_bootmem(__pa(availmem), memory_end - (availmem));
 }