[PATCH] sh: Drop hp690 discontig support

There was only one board using this (hp690 specifically), and it just so
happens that it's only physically discontiguous at the "normal" P1 offset.  If
we bump up the P1 offset, it's possible to hit a shadowed region of memory
where we suddenly become magically contiguous.

As people have been using this shadowed region workaround for quite some time
(and without any adverse effects), it's time to drop the left over discontig
bits that no longer have any practical use (it was always very much
hp690-centric to begin with).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 7d31d628cdec8407f7f4557dee460e0b568fc6da..64f5ae0ff96d1474c3f4052848ced900c78d5a1f 100644 (file)
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -490,16 +490,6 @@ config CPU_SUBTYPE_ST40
        depends on CPU_SUBTYPE_ST40STB1 || CPU_SUBTYPE_ST40GX1
        default y
 
-config ARCH_DISCONTIGMEM_ENABLE
-       bool
-       depends on SH_HP690
-       default y
-       help
-         Say Y to upport efficient handling of discontiguous physical memory,
-         for architectures which are either NUMA (Non-Uniform Memory Access)
-         or have huge holes in the physical address space for other reasons.
-         See <file:Documentation/vm/numa> for more.
-
 source "mm/Kconfig"
 
 config ZERO_PAGE_OFFSET

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 25b9d9ebe858b83163f00b83666a839124379b01..036050b377cdd6458ae1cf1858bfb445a4aad4aa 100644 (file)
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -83,9 +83,9 @@ static struct sh_machine_vector* __init get_mv_byname(const char* name);
 /* ... */
 #define COMMAND_LINE ((char *) (PARAM+0x100))
 
-#define RAMDISK_IMAGE_START_MASK       0x07FF
+#define RAMDISK_IMAGE_START_MASK       0x07FF
 #define RAMDISK_PROMPT_FLAG            0x8000
-#define RAMDISK_LOAD_FLAG              0x4000  
+#define RAMDISK_LOAD_FLAG              0x4000
 
 static char command_line[COMMAND_LINE_SIZE] = { 0, };
 
@@ -284,18 +284,6 @@ void __init setup_arch(char **cmdline_p)
 #define PFN_DOWN(x)    ((x) >> PAGE_SHIFT)
 #define PFN_PHYS(x)    ((x) << PAGE_SHIFT)
 
-#ifdef CONFIG_DISCONTIGMEM
-       NODE_DATA(0)->bdata = &discontig_node_bdata[0];
-       NODE_DATA(1)->bdata = &discontig_node_bdata[1];
-
-       bootmap_size = init_bootmem_node(NODE_DATA(1), 
-                                        PFN_UP(__MEMORY_START_2ND),
-                                        PFN_UP(__MEMORY_START_2ND),
-                                        PFN_DOWN(__MEMORY_START_2ND+__MEMORY_SIZE_2ND));
-       free_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, __MEMORY_SIZE_2ND);
-       reserve_bootmem_node(NODE_DATA(1), __MEMORY_START_2ND, bootmap_size);
-#endif
-
        /*
         * Find the highest page frame number we have available
         */
@@ -306,10 +294,10 @@ void __init setup_arch(char **cmdline_p)
         */
        max_low_pfn = max_pfn;
 
-       /*
+       /*
         * Partially used pages are not usable - thus
         * we are rounding upwards:
-        */
+        */
        start_pfn = PFN_UP(__pa(_end));
 
        /*
@@ -360,12 +348,12 @@ void __init setup_arch(char **cmdline_p)
        reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE);
 
 #ifdef CONFIG_BLK_DEV_INITRD
-       ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
-       if (&__rd_start != &__rd_end) {
+       ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
+       if (&__rd_start != &__rd_end) {
                LOADER_TYPE = 1;
                INITRD_START = PHYSADDR((unsigned long)&__rd_start) - __MEMORY_START;
                INITRD_SIZE = (unsigned long)&__rd_end - (unsigned long)&__rd_start;
-       }
+       }
 
        if (LOADER_TYPE && INITRD_START) {
                if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) {

diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 4e9c854845a4461155b5fd040de85dcdf4c19784..e342565f75fbc464684faf8e54f28e05134475ea 100644 (file)
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -51,11 +51,6 @@ unsigned long mmu_context_cache = NO_CONTEXT;
 #define MAX_LOW_PFN    (NODE_DATA(0)->bdata->node_low_pfn)
 #endif
 
-#ifdef CONFIG_DISCONTIGMEM
-pg_data_t discontig_page_data[MAX_NUMNODES];
-bootmem_data_t discontig_node_bdata[MAX_NUMNODES];
-#endif
-
 void (*copy_page)(void *from, void *to);
 void (*clear_page)(void *to);
 
@@ -216,15 +211,6 @@ void __init paging_init(void)
 #endif
        NODE_DATA(0)->node_mem_map = NULL;
        free_area_init_node(0, NODE_DATA(0), zones_size, __MEMORY_START >> PAGE_SHIFT, 0);
-
-#ifdef CONFIG_DISCONTIGMEM
-       /*
-        * And for discontig, do some more fixups on the zone sizes..
-        */
-       zones_size[ZONE_DMA] = __MEMORY_SIZE_2ND >> PAGE_SHIFT;
-       zones_size[ZONE_NORMAL] = 0;
-       free_area_init_node(1, NODE_DATA(1), zones_size, __MEMORY_START_2ND >> PAGE_SHIFT, 0);
-#endif
 }
 
 void __init mem_init(void)
@@ -248,7 +234,7 @@ void __init mem_init(void)
        memset(empty_zero_page, 0, PAGE_SIZE);
        __flush_wback_region(empty_zero_page, PAGE_SIZE);
 
-       /* 
+       /*
         * Setup wrappers for copy/clear_page(), these will get overridden
         * later in the boot process if a better method is available.
         */
@@ -257,9 +243,6 @@ void __init mem_init(void)
 
        /* this will put all low memory onto the freelists */
        totalram_pages += free_all_bootmem_node(NODE_DATA(0));
-#ifdef CONFIG_DISCONTIGMEM
-       totalram_pages += free_all_bootmem_node(NODE_DATA(1));
-#endif
        reservedpages = 0;
        for (tmp = 0; tmp < num_physpages; tmp++)
                /*
@@ -286,7 +269,7 @@ void __init mem_init(void)
 void free_initmem(void)
 {
        unsigned long addr;
-       
+
        addr = (unsigned long)(&__init_begin);
        for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
                ClearPageReserved(virt_to_page(addr));

diff --git a/include/asm-sh/mmzone.h b/include/asm-sh/mmzone.h
deleted file mode 100644 (file)
index 0e74066..0000000
--- a/include/asm-sh/mmzone.h
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- *  linux/include/asm-sh/mmzone.h
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#ifndef __ASM_SH_MMZONE_H
-#define __ASM_SH_MMZONE_H
-
-#include <linux/config.h>
-
-#ifdef CONFIG_DISCONTIGMEM
-
-/* Currently, just for HP690 */
-#define PHYSADDR_TO_NID(phys)  ((((phys) - __MEMORY_START) >= 0x01000000)?1:0)
-
-extern pg_data_t discontig_page_data[MAX_NUMNODES];
-extern bootmem_data_t discontig_node_bdata[MAX_NUMNODES];
-
-/*
- * Following are macros that each numa implmentation must define.
- */
-
-/*
- * Given a kernel address, find the home node of the underlying memory.
- */
-#define KVADDR_TO_NID(kaddr)   PHYSADDR_TO_NID(__pa(kaddr))
-
-/*
- * Return a pointer to the node data for node n.
- */
-#define NODE_DATA(nid)         (&discontig_page_data[nid])
-
-/*
- * NODE_MEM_MAP gives the kaddr for the mem_map of the node.
- */
-#define NODE_MEM_MAP(nid)      (NODE_DATA(nid)->node_mem_map)
-
-#define phys_to_page(phys)                                             \
-({ unsigned int node = PHYSADDR_TO_NID(phys);                          \
-   NODE_MEM_MAP(node)                                                  \
-     + (((phys) - NODE_DATA(node)->node_start_paddr) >> PAGE_SHIFT); })
-
-static inline int is_valid_page(struct page *page)
-{
-       unsigned int i;
-
-       for (i = 0; i < MAX_NUMNODES; i++) {
-               if (page >= NODE_MEM_MAP(i) &&
-                   page < NODE_MEM_MAP(i) + NODE_DATA(i)->node_size)
-                       return 1;
-       }
-       return 0;
-}
-
-#define VALID_PAGE(page)       is_valid_page(page)
-#define page_to_phys(page)     PHYSADDR(page_address(page))
-
-#endif /* CONFIG_DISCONTIGMEM */
-#endif

diff --git a/include/asm-sh/page.h b/include/asm-sh/page.h
index 324e6cc5ecf71c90d66fa90fe459e944791f6c86..972c3f655b2a01030f78fc720056264361f1af88 100644 (file)
--- a/include/asm-sh/page.h
+++ b/include/asm-sh/page.h
@@ -93,11 +93,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
 
 #define __MEMORY_START         CONFIG_MEMORY_START
 #define __MEMORY_SIZE          CONFIG_MEMORY_SIZE
-#ifdef CONFIG_DISCONTIGMEM
-/* Just for HP690, for now.. */
-#define __MEMORY_START_2ND     (__MEMORY_START+0x02000000)
-#define __MEMORY_SIZE_2ND      0x001000000 /* 16MB */
-#endif
 
 #define PAGE_OFFSET            (0x80000000UL)
 #define __pa(x)                        ((unsigned long)(x)-PAGE_OFFSET)
@@ -105,10 +100,8 @@ typedef struct { unsigned long pgprot; } pgprot_t;
 
 #define MAP_NR(addr)           (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
 
-#ifndef CONFIG_DISCONTIGMEM
 #define phys_to_page(phys)     (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT))
 #define page_to_phys(page)     (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START)
-#endif
 
 /* PFN start number, because of __MEMORY_START */
 #define PFN_START              (__MEMORY_START >> PAGE_SHIFT)