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m68k: switch to MEMBLOCK + NO_BOOTMEM

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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>
This commit is contained in:
Mike Rapoport
2018-07-04 09:28:16 +03:00
committed by Geert Uytterhoeven
parent 9e09221957
commit 1008a11590
7 changed files with 28 additions and 60 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
arch/m68k/kernel/setup_mm.c
View File

@@ -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);

20
arch/m68k/kernel/setup_no.c
View File

@@ -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) */
/*