diff options
Diffstat (limited to 'arch/um/kernel/physmem.c')
| -rw-r--r-- | arch/um/kernel/physmem.c | 74 |
1 files changed, 40 insertions, 34 deletions
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c index abafa64b872..638f3b5f609 100644 --- a/arch/um/kernel/physmem.c +++ b/arch/um/kernel/physmem.c @@ -40,7 +40,7 @@ static struct rb_node **find_rb(void *virt) while(*n != NULL){ d = rb_entry(*n, struct phys_desc, rb); if(d->virt == virt) - return(n); + return n; if(d->virt > virt) n = &(*n)->rb_left; @@ -48,7 +48,7 @@ static struct rb_node **find_rb(void *virt) n = &(*n)->rb_right; } - return(n); + return n; } static struct phys_desc *find_phys_mapping(void *virt) @@ -56,9 +56,9 @@ static struct phys_desc *find_phys_mapping(void *virt) struct rb_node **n = find_rb(virt); if(*n == NULL) - return(NULL); + return NULL; - return(rb_entry(*n, struct phys_desc, rb)); + return rb_entry(*n, struct phys_desc, rb); } static void insert_phys_mapping(struct phys_desc *desc) @@ -89,10 +89,10 @@ static struct desc_mapping *find_mapping(int fd) list_for_each(ele, &descriptor_mappings){ desc = list_entry(ele, struct desc_mapping, list); if(desc->fd == fd) - return(desc); + return desc; } - return(NULL); + return NULL; } static struct desc_mapping *descriptor_mapping(int fd) @@ -101,11 +101,11 @@ static struct desc_mapping *descriptor_mapping(int fd) desc = find_mapping(fd); if(desc != NULL) - return(desc); + return desc; desc = kmalloc(sizeof(*desc), GFP_ATOMIC); if(desc == NULL) - return(NULL); + return NULL; *desc = ((struct desc_mapping) { .fd = fd, @@ -113,7 +113,7 @@ static struct desc_mapping *descriptor_mapping(int fd) .pages = LIST_HEAD_INIT(desc->pages) }); list_add(&desc->list, &descriptor_mappings); - return(desc); + return desc; } int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w) @@ -125,11 +125,11 @@ int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w) fd_maps = descriptor_mapping(fd); if(fd_maps == NULL) - return(-ENOMEM); + return -ENOMEM; phys = __pa(virt); desc = find_phys_mapping(virt); - if(desc != NULL) + if(desc != NULL) panic("Address 0x%p is already substituted\n", virt); err = -ENOMEM; @@ -155,7 +155,7 @@ int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w) rb_erase(&desc->rb, &phys_mappings); kfree(desc); out: - return(err); + return err; } static int physmem_fd = -1; @@ -182,10 +182,10 @@ int physmem_remove_mapping(void *virt) virt = (void *) ((unsigned long) virt & PAGE_MASK); desc = find_phys_mapping(virt); if(desc == NULL) - return(0); + return 0; remove_mapping(desc); - return(1); + return 1; } void physmem_forget_descriptor(int fd) @@ -239,9 +239,9 @@ void arch_free_page(struct page *page, int order) int is_remapped(void *virt) { - struct phys_desc *desc = find_phys_mapping(virt); + struct phys_desc *desc = find_phys_mapping(virt); - return(desc != NULL); + return desc != NULL; } /* Changed during early boot */ @@ -276,7 +276,7 @@ int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem) else map = alloc_bootmem_low_pages(total_len); if(map == NULL) - return(-ENOMEM); + return -ENOMEM; for(i = 0; i < total_pages; i++){ p = &map[i]; @@ -286,7 +286,7 @@ int init_maps(unsigned long physmem, unsigned long iomem, unsigned long highmem) } max_mapnr = total_pages; - return(0); + return 0; } /* Changed during early boot */ @@ -296,7 +296,7 @@ unsigned long get_kmem_end(void) { if(kmem_top == 0) kmem_top = CHOOSE_MODE(kmem_end_tt, kmem_end_skas); - return(kmem_top); + return kmem_top; } void map_memory(unsigned long virt, unsigned long phys, unsigned long len, @@ -379,7 +379,7 @@ int phys_mapping(unsigned long phys, __u64 *offset_out) *offset_out = phys - iomem_size; } - return(fd); + return fd; } static int __init uml_mem_setup(char *line, int *add) @@ -398,6 +398,23 @@ __uml_setup("mem=", uml_mem_setup, " Example: mem=64M\n\n" ); +extern int __init parse_iomem(char *str, int *add); + +__uml_setup("iomem=", parse_iomem, +"iomem=<name>,<file>\n" +" Configure <file> as an IO memory region named <name>.\n\n" +); + +/* + * This list is constructed in parse_iomem and addresses filled in in + * setup_iomem, both of which run during early boot. Afterwards, it's + * unchanged. + */ +struct iomem_region *iomem_regions = NULL; + +/* Initialized in parse_iomem */ +int iomem_size = 0; + unsigned long find_iomem(char *driver, unsigned long *len_out) { struct iomem_region *region = iomem_regions; @@ -405,13 +422,13 @@ unsigned long find_iomem(char *driver, unsigned long *len_out) while(region != NULL){ if(!strcmp(region->driver, driver)){ *len_out = region->size; - return(region->virt); + return region->virt; } region = region->next; } - return(0); + return 0; } int setup_iomem(void) @@ -435,18 +452,7 @@ int setup_iomem(void) region = region->next; } - return(0); + return 0; } __initcall(setup_iomem); - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ |