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sh: Various nommu fixes.
This fixes up some of the various outstanding nommu bugs on SH. Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Yoshinori Sato
Paul Mundt
parent
e7f93a355c
commit
e96636ccfa
8 changed files with 50 additions and 23 deletions
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@ -21,11 +21,17 @@ endif
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CONFIG_PAGE_OFFSET ?= 0x80000000
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CONFIG_MEMORY_START ?= 0x0c000000
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CONFIG_BOOT_LINK_OFFSET ?= 0x00800000
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IMAGE_OFFSET := $(shell printf "0x%8x" $$[$(CONFIG_PAGE_OFFSET)+$(CONFIG_MEMORY_START)+$(CONFIG_BOOT_LINK_OFFSET)])
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IMAGE_OFFSET := $(shell printf "0x%8x" $$[$(CONFIG_PAGE_OFFSET) + \
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$(CONFIG_MEMORY_START) + \
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$(CONFIG_BOOT_LINK_OFFSET)])
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LIBGCC := $(shell $(CC) $(CFLAGS) -print-libgcc-file-name)
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LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup -T $(obj)/../../kernel/vmlinux.lds
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$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o FORCE
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$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o $(LIBGCC) FORCE
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$(call if_changed,ld)
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@:
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@ -248,8 +248,13 @@ void __init mem_init(void)
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* Setup wrappers for copy/clear_page(), these will get overridden
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* later in the boot process if a better method is available.
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*/
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#ifdef CONFIG_MMU
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copy_page = copy_page_slow;
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clear_page = clear_page_slow;
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#else
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copy_page = copy_page_nommu;
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clear_page = clear_page_nommu;
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#endif
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/* this will put all low memory onto the freelists */
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totalram_pages += free_all_bootmem_node(NODE_DATA(0));
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@ -14,23 +14,24 @@
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#include <linux/string.h>
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#include <asm/page.h>
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static void copy_page_nommu(void *to, void *from)
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void copy_page_nommu(void *to, void *from)
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{
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memcpy(to, from, PAGE_SIZE);
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}
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static void clear_page_nommu(void *to)
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void clear_page_nommu(void *to)
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{
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memset(to, 0, PAGE_SIZE);
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}
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static int __init pg_nommu_init(void)
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__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n)
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{
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copy_page = copy_page_nommu;
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clear_page = clear_page_nommu;
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memcpy(to, from, n);
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return 0;
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}
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subsys_initcall(pg_nommu_init);
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__kernel_size_t __clear_user(void *to, __kernel_size_t n)
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{
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memset(to, 0, n);
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return 0;
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}
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@ -14,11 +14,19 @@
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#include <asm/cpu/addrspace.h>
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/* Memory segments (32bit Privileged mode addresses) */
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#ifdef CONFIG_MMU
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#define P0SEG 0x00000000
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#define P1SEG 0x80000000
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#define P2SEG 0xa0000000
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#define P3SEG 0xc0000000
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#define P4SEG 0xe0000000
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#else
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#define P0SEG 0x00000000
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#define P1SEG 0x00000000
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#define P2SEG 0x20000000
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#define P3SEG 0x40000000
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#define P4SEG 0x80000000
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#endif
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/* Returns the privileged segment base of a given address */
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#define PXSEG(a) (((unsigned long)(a)) & 0xe0000000)
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@ -13,7 +13,7 @@
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#define __ASM_SH_FLAT_H
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#define flat_stack_align(sp) /* nothing needed */
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#define flat_argvp_envp_on_stack() 1
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#define flat_argvp_envp_on_stack() 0
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#define flat_old_ram_flag(flags) (flags)
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#define flat_reloc_valid(reloc, size) ((reloc) <= (size))
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#define flat_get_addr_from_rp(rp, relval, flags) get_unaligned(rp)
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@ -3,19 +3,8 @@
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#if !defined(CONFIG_MMU)
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struct mm_rblock_struct {
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int size;
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int refcount;
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void *kblock;
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};
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struct mm_tblock_struct {
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struct mm_rblock_struct *rblock;
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struct mm_tblock_struct *next;
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};
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typedef struct {
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struct mm_tblock_struct tblock;
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struct vm_list_struct *vmlist;
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unsigned long end_brk;
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} mm_context_t;
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@ -38,8 +38,13 @@
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extern void (*clear_page)(void *to);
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extern void (*copy_page)(void *to, void *from);
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#ifdef CONFIG_MMU
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extern void clear_page_slow(void *to);
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extern void copy_page_slow(void *to, void *from);
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#else
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extern void clear_page_nommu(void *to);
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extern void copy_page_nommu(void *to, void *from);
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#endif
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#if defined(CONFIG_MMU) && (defined(CONFIG_CPU_SH4) || \
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defined(CONFIG_SH7705_CACHE_32KB))
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@ -168,6 +168,7 @@ do { \
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__gu_err; \
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})
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#ifdef CONFIG_MMU
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#define __get_user_check(x,ptr,size) \
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({ \
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long __gu_err, __gu_val; \
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@ -257,6 +258,18 @@ __asm__("stc r7_bank, %1\n\t" \
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: "r" (addr) \
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: "t"); \
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})
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#else /* CONFIG_MMU */
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#define __get_user_check(x,ptr,size) \
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({ \
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long __gu_err, __gu_val; \
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if (__access_ok((unsigned long)(ptr), (size))) { \
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__get_user_size(__gu_val, (ptr), (size), __gu_err); \
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(x) = (__typeof__(*(ptr)))__gu_val; \
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} else \
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__gu_err = -EFAULT; \
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__gu_err; \
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})
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#endif
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#define __get_user_asm(x, addr, err, insn) \
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({ \
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