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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [m68k/] [mm/] [kmap.c] - Blame information for rev 1765

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/*
 *  linux/arch/m68k/mm/kmap.c
 *
 *  Copyright (C) 1997 Roman Hodek
 *
 *  10/01/99 cleaned up the code and changing to the same interface
 *           used by other architectures                /Roman Zippel
 */
 
#include <linux/config.h>
#include <linux/mm.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
 
#include <asm/setup.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <asm/io.h>
#include <asm/system.h>
 
#undef DEBUG
 
#define PTRTREESIZE     (256*1024)
 
/*
 * For 040/060 we can use the virtual memory area like other architectures,
 * but for 020/030 we want to use early termination page descriptor and we
 * can't mix this with normal page descriptors, so we have to copy that code
 * (mm/vmalloc.c) and return appriorate aligned addresses.
 */
 
#ifdef CPU_M68040_OR_M68060_ONLY
 
#define IO_SIZE         PAGE_SIZE
 
static inline struct vm_struct *get_io_area(unsigned long size)
{
        return get_vm_area(size, VM_IOREMAP);
}
 
 
static inline void free_io_area(void *addr)
{
        return vfree((void *)(PAGE_MASK & (unsigned long)addr));
}
 
#else
 
#define IO_SIZE         (256*1024)
 
static struct vm_struct *iolist = NULL;
 
static struct vm_struct *get_io_area(unsigned long size)
{
        unsigned long addr;
        struct vm_struct **p, *tmp, *area;
 
        area = (struct vm_struct *)kmalloc(sizeof(*area), GFP_KERNEL);
        if (!area)
                return NULL;
        addr = KMAP_START;
        for (p = &iolist; (tmp = *p) ; p = &tmp->next) {
                if (size + addr < (unsigned long)tmp->addr)
                        break;
                if (addr > KMAP_END-size)
                        return NULL;
                addr = tmp->size + (unsigned long)tmp->addr;
        }
        area->addr = (void *)addr;
        area->size = size + IO_SIZE;    /* leave a gap between */
        area->next = *p;
        *p = area;
        return area;
}
 
static inline void free_io_area(void *addr)
{
        struct vm_struct **p, *tmp;
 
        if (!addr)
                return;
        addr = (void *)((unsigned long)addr & -IO_SIZE);
        for (p = &iolist ; (tmp = *p) ; p = &tmp->next) {
                if (tmp->addr == addr) {
                        *p = tmp->next;
                        if ( tmp->size > IO_SIZE )
                                __iounmap(tmp->addr, tmp->size - IO_SIZE);
                        else
                                printk("free_io_area: Invalid I/O area size %lu\n", tmp->size);
                        kfree(tmp);
                        return;
                }
        }
}
 
#endif
 
/*
 * Map some physical address range into the kernel address space. The
 * code is copied and adapted from map_chunk().
 */
/* Rewritten by Andreas Schwab to remove all races. */
 
void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag)
{
        struct vm_struct *area;
        unsigned long virtaddr, retaddr;
        long offset;
        pgd_t *pgd_dir;
        pmd_t *pmd_dir;
        pte_t *pte_dir;
 
        /*
         * Don't allow mappings that wrap..
         */
        if (!size || size > physaddr + size)
                return NULL;
 
#ifdef CONFIG_AMIGA
        if (MACH_IS_AMIGA) {
                if ((physaddr >= 0x40000000) && (physaddr + size < 0x60000000)
                    && (cacheflag == IOMAP_NOCACHE_SER))
                        return (void *)physaddr;
        }
#endif
 
#ifdef DEBUG
        printk("ioremap: 0x%lx,0x%lx(%d) - ", physaddr, size, cacheflag);
#endif
        /*
         * Mappings have to be aligned
         */
        offset = physaddr & (IO_SIZE - 1);
        physaddr &= -IO_SIZE;
        size = (size + offset + IO_SIZE - 1) & -IO_SIZE;
 
        /*
         * Ok, go for it..
         */
        area = get_io_area(size);
        if (!area)
                return NULL;
 
        virtaddr = (unsigned long)area->addr;
        retaddr = virtaddr + offset;
#ifdef DEBUG
        printk("0x%lx,0x%lx,0x%lx", physaddr, virtaddr, retaddr);
#endif
 
        /*
         * add cache and table flags to physical address
         */
        if (CPU_IS_040_OR_060) {
                physaddr |= (_PAGE_PRESENT | _PAGE_GLOBAL040 |
                             _PAGE_ACCESSED | _PAGE_DIRTY);
                switch (cacheflag) {
                case IOMAP_FULL_CACHING:
                        physaddr |= _PAGE_CACHE040;
                        break;
                case IOMAP_NOCACHE_SER:
                default:
                        physaddr |= _PAGE_NOCACHE_S;
                        break;
                case IOMAP_NOCACHE_NONSER:
                        physaddr |= _PAGE_NOCACHE;
                        break;
                case IOMAP_WRITETHROUGH:
                        physaddr |= _PAGE_CACHE040W;
                        break;
                }
        } else {
                physaddr |= (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
                switch (cacheflag) {
                case IOMAP_NOCACHE_SER:
                case IOMAP_NOCACHE_NONSER:
                default:
                        physaddr |= _PAGE_NOCACHE030;
                        break;
                case IOMAP_FULL_CACHING:
                case IOMAP_WRITETHROUGH:
                        break;
                }
        }
 
        while ((long)size > 0) {
#ifdef DEBUG
                if (!(virtaddr & (PTRTREESIZE-1)))
                        printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr);
#endif
                pgd_dir = pgd_offset_k(virtaddr);
                pmd_dir = pmd_alloc_kernel(pgd_dir, virtaddr);
                if (!pmd_dir) {
                        printk("ioremap: no mem for pmd_dir\n");
                        return NULL;
                }
 
                if (CPU_IS_020_OR_030) {
                        pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr;
                        physaddr += PTRTREESIZE;
                        virtaddr += PTRTREESIZE;
                        size -= PTRTREESIZE;
                } else {
                        pte_dir = pte_alloc_kernel(pmd_dir, virtaddr);
                        if (!pte_dir) {
                                printk("ioremap: no mem for pte_dir\n");
                                return NULL;
                        }
 
                        pte_val(*pte_dir) = physaddr;
                        virtaddr += PAGE_SIZE;
                        physaddr += PAGE_SIZE;
                        size -= PAGE_SIZE;
                }
        }
#ifdef DEBUG
        printk("\n");
#endif
        flush_tlb_all();
 
        return (void *)retaddr;
}
 
/*
 * Unmap a ioremap()ed region again
 */
void iounmap(void *addr)
{
#ifdef CONFIG_AMIGA
        if ((!MACH_IS_AMIGA) ||
            (((unsigned long)addr < 0x40000000) ||
             ((unsigned long)addr > 0x60000000)))
                        free_io_area(addr);
#else
        free_io_area(addr);
#endif
}
 
/*
 * __iounmap unmaps nearly everything, so be careful
 * it doesn't free currently pointer/page tables anymore but it
 * wans't used anyway and might be added later.
 */
void __iounmap(void *addr, unsigned long size)
{
        unsigned long virtaddr = (unsigned long)addr;
        pgd_t *pgd_dir;
        pmd_t *pmd_dir;
        pte_t *pte_dir;
 
        while ((long)size > 0) {
                pgd_dir = pgd_offset_k(virtaddr);
                if (pgd_bad(*pgd_dir)) {
                        printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
                        pgd_clear(pgd_dir);
                        return;
                }
                pmd_dir = pmd_offset(pgd_dir, virtaddr);
 
                if (CPU_IS_020_OR_030) {
                        int pmd_off = (virtaddr/PTRTREESIZE) & 15;
 
                        if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) {
                                pmd_dir->pmd[pmd_off] = 0;
                                virtaddr += PTRTREESIZE;
                                size -= PTRTREESIZE;
                                continue;
                        }
                }
 
                if (pmd_bad(*pmd_dir)) {
                        printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
                        pmd_clear(pmd_dir);
                        return;
                }
                pte_dir = pte_offset(pmd_dir, virtaddr);
 
                pte_val(*pte_dir) = 0;
                virtaddr += PAGE_SIZE;
                size -= PAGE_SIZE;
        }
 
        flush_tlb_all();
}
 
/*
 * Set new cache mode for some kernel address space.
 * The caller must push data for that range itself, if such data may already
 * be in the cache.
 */
void kernel_set_cachemode(void *addr, unsigned long size, int cmode)
{
        unsigned long virtaddr = (unsigned long)addr;
        pgd_t *pgd_dir;
        pmd_t *pmd_dir;
        pte_t *pte_dir;
 
        if (CPU_IS_040_OR_060) {
                switch (cmode) {
                case IOMAP_FULL_CACHING:
                        cmode = _PAGE_CACHE040;
                        break;
                case IOMAP_NOCACHE_SER:
                default:
                        cmode = _PAGE_NOCACHE_S;
                        break;
                case IOMAP_NOCACHE_NONSER:
                        cmode = _PAGE_NOCACHE;
                        break;
                case IOMAP_WRITETHROUGH:
                        cmode = _PAGE_CACHE040W;
                        break;
                }
        } else {
                switch (cmode) {
                case IOMAP_NOCACHE_SER:
                case IOMAP_NOCACHE_NONSER:
                default:
                        cmode = _PAGE_NOCACHE030;
                        break;
                case IOMAP_FULL_CACHING:
                case IOMAP_WRITETHROUGH:
                        cmode = 0;
                }
        }
 
        while ((long)size > 0) {
                pgd_dir = pgd_offset_k(virtaddr);
                if (pgd_bad(*pgd_dir)) {
                        printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
                        pgd_clear(pgd_dir);
                        return;
                }
                pmd_dir = pmd_offset(pgd_dir, virtaddr);
 
                if (CPU_IS_020_OR_030) {
                        int pmd_off = (virtaddr/PTRTREESIZE) & 15;
 
                        if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) {
                                pmd_dir->pmd[pmd_off] = (pmd_dir->pmd[pmd_off] &
                                                         _CACHEMASK040) | cmode;
                                virtaddr += PTRTREESIZE;
                                size -= PTRTREESIZE;
                                continue;
                        }
                }
 
                if (pmd_bad(*pmd_dir)) {
                        printk("iocachemode: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
                        pmd_clear(pmd_dir);
                        return;
                }
                pte_dir = pte_offset(pmd_dir, virtaddr);
 
                pte_val(*pte_dir) = (pte_val(*pte_dir) & _CACHEMASK040) | cmode;
                virtaddr += PAGE_SIZE;
                size -= PAGE_SIZE;
        }
 
        flush_tlb_all();
}

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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [m68k/] [mm/] [kmap.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1275	phoenix	`/*`
2			`* linux/arch/m68k/mm/kmap.c`
3			`*`
4			`* Copyright (C) 1997 Roman Hodek`
5			`*`
6			`* 10/01/99 cleaned up the code and changing to the same interface`
7			`* used by other architectures /Roman Zippel`
8			`*/`
9
10			`#include <linux/config.h>`
11			`#include <linux/mm.h>`
12			`#include <linux/kernel.h>`
13			`#include <linux/string.h>`
14			`#include <linux/types.h>`
15			`#include <linux/slab.h>`
16			`#include <linux/vmalloc.h>`
17
18			`#include <asm/setup.h>`
19			`#include <asm/segment.h>`
20			`#include <asm/page.h>`
21			`#include <asm/pgalloc.h>`
22			`#include <asm/io.h>`
23			`#include <asm/system.h>`
24
25			`#undef DEBUG`
26
27			`#define PTRTREESIZE (256*1024)`
28
29			`/*`
30			`* For 040/060 we can use the virtual memory area like other architectures,`
31			`* but for 020/030 we want to use early termination page descriptor and we`
32			`* can't mix this with normal page descriptors, so we have to copy that code`
33			`* (mm/vmalloc.c) and return appriorate aligned addresses.`
34			`*/`
35
36			`#ifdef CPU_M68040_OR_M68060_ONLY`
37
38			`#define IO_SIZE PAGE_SIZE`
39
40			`static inline struct vm_struct *get_io_area(unsigned long size)`
41			`{`
42			`return get_vm_area(size, VM_IOREMAP);`
43			`}`
44
45
46			`static inline void free_io_area(void *addr)`
47			`{`
48			`return vfree((void *)(PAGE_MASK & (unsigned long)addr));`
49			`}`
50
51			`#else`
52
53			`#define IO_SIZE (256*1024)`
54
55			`static struct vm_struct *iolist = NULL;`
56
57			`static struct vm_struct *get_io_area(unsigned long size)`
58			`{`
59			`unsigned long addr;`
60			`struct vm_struct *p, tmp, *area;`
61
62			`area = (struct vm_struct )kmalloc(sizeof(area), GFP_KERNEL);`
63			`if (!area)`
64			`return NULL;`
65			`addr = KMAP_START;`
66			`for (p = &iolist; (tmp = *p) ; p = &tmp->next) {`
67			`if (size + addr < (unsigned long)tmp->addr)`
68			`break;`
69			`if (addr > KMAP_END-size)`
70			`return NULL;`
71			`addr = tmp->size + (unsigned long)tmp->addr;`
72			`}`
73			`area->addr = (void *)addr;`
74			`area->size = size + IO_SIZE; /* leave a gap between */`
75			`area->next = *p;`
76			`*p = area;`
77			`return area;`
78			`}`
79
80			`static inline void free_io_area(void *addr)`
81			`{`
82			`struct vm_struct *p, tmp;`
83
84			`if (!addr)`
85			`return;`
86			`addr = (void *)((unsigned long)addr & -IO_SIZE);`
87			`for (p = &iolist ; (tmp = *p) ; p = &tmp->next) {`
88			`if (tmp->addr == addr) {`
89			`*p = tmp->next;`
90			`if ( tmp->size > IO_SIZE )`
91			`__iounmap(tmp->addr, tmp->size - IO_SIZE);`
92			`else`
93			`printk("free_io_area: Invalid I/O area size %lu\n", tmp->size);`
94			`kfree(tmp);`
95			`return;`
96			`}`
97			`}`
98			`}`
99
100			`#endif`
101
102			`/*`
103			`* Map some physical address range into the kernel address space. The`
104			`* code is copied and adapted from map_chunk().`
105			`*/`
106			`/* Rewritten by Andreas Schwab to remove all races. */`
107
108			`void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag)`
109			`{`
110			`struct vm_struct *area;`
111			`unsigned long virtaddr, retaddr;`
112			`long offset;`
113			`pgd_t *pgd_dir;`
114			`pmd_t *pmd_dir;`
115			`pte_t *pte_dir;`
116
117			`/*`
118			`* Don't allow mappings that wrap..`
119			`*/`
120			`if (!size \|\| size > physaddr + size)`
121			`return NULL;`
122
123			`#ifdef CONFIG_AMIGA`
124			`if (MACH_IS_AMIGA) {`
125			`if ((physaddr >= 0x40000000) && (physaddr + size < 0x60000000)`
126			`&& (cacheflag == IOMAP_NOCACHE_SER))`
127			`return (void *)physaddr;`
128			`}`
129			`#endif`
130
131			`#ifdef DEBUG`
132			`printk("ioremap: 0x%lx,0x%lx(%d) - ", physaddr, size, cacheflag);`
133			`#endif`
134			`/*`
135			`* Mappings have to be aligned`
136			`*/`
137			`offset = physaddr & (IO_SIZE - 1);`
138			`physaddr &= -IO_SIZE;`
139			`size = (size + offset + IO_SIZE - 1) & -IO_SIZE;`
140
141			`/*`
142			`* Ok, go for it..`
143			`*/`
144			`area = get_io_area(size);`
145			`if (!area)`
146			`return NULL;`
147
148			`virtaddr = (unsigned long)area->addr;`
149			`retaddr = virtaddr + offset;`
150			`#ifdef DEBUG`
151			`printk("0x%lx,0x%lx,0x%lx", physaddr, virtaddr, retaddr);`
152			`#endif`
153
154			`/*`
155			`* add cache and table flags to physical address`
156			`*/`
157			`if (CPU_IS_040_OR_060) {`
158			`physaddr \|= (_PAGE_PRESENT \| _PAGE_GLOBAL040 \|`
159			`_PAGE_ACCESSED \| _PAGE_DIRTY);`
160			`switch (cacheflag) {`
161			`case IOMAP_FULL_CACHING:`
162			`physaddr \|= _PAGE_CACHE040;`
163			`break;`
164			`case IOMAP_NOCACHE_SER:`
165			`default:`
166			`physaddr \|= _PAGE_NOCACHE_S;`
167			`break;`
168			`case IOMAP_NOCACHE_NONSER:`
169			`physaddr \|= _PAGE_NOCACHE;`
170			`break;`
171			`case IOMAP_WRITETHROUGH:`
172			`physaddr \|= _PAGE_CACHE040W;`
173			`break;`
174			`}`
175			`} else {`
176			`physaddr \|= (_PAGE_PRESENT \| _PAGE_ACCESSED \| _PAGE_DIRTY);`
177			`switch (cacheflag) {`
178			`case IOMAP_NOCACHE_SER:`
179			`case IOMAP_NOCACHE_NONSER:`
180			`default:`
181			`physaddr \|= _PAGE_NOCACHE030;`
182			`break;`
183			`case IOMAP_FULL_CACHING:`
184			`case IOMAP_WRITETHROUGH:`
185			`break;`
186			`}`
187			`}`
188
189			`while ((long)size > 0) {`
190			`#ifdef DEBUG`
191			`if (!(virtaddr & (PTRTREESIZE-1)))`
192			`printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr);`
193			`#endif`
194			`pgd_dir = pgd_offset_k(virtaddr);`
195			`pmd_dir = pmd_alloc_kernel(pgd_dir, virtaddr);`
196			`if (!pmd_dir) {`
197			`printk("ioremap: no mem for pmd_dir\n");`
198			`return NULL;`
199			`}`
200
201			`if (CPU_IS_020_OR_030) {`
202			`pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr;`
203			`physaddr += PTRTREESIZE;`
204			`virtaddr += PTRTREESIZE;`
205			`size -= PTRTREESIZE;`
206			`} else {`
207			`pte_dir = pte_alloc_kernel(pmd_dir, virtaddr);`
208			`if (!pte_dir) {`
209			`printk("ioremap: no mem for pte_dir\n");`
210			`return NULL;`
211			`}`
212
213			`pte_val(*pte_dir) = physaddr;`
214			`virtaddr += PAGE_SIZE;`
215			`physaddr += PAGE_SIZE;`
216			`size -= PAGE_SIZE;`
217			`}`
218			`}`
219			`#ifdef DEBUG`
220			`printk("\n");`
221			`#endif`
222			`flush_tlb_all();`
223
224			`return (void *)retaddr;`
225			`}`
226
227			`/*`
228			`* Unmap a ioremap()ed region again`
229			`*/`
230			`void iounmap(void *addr)`
231			`{`
232			`#ifdef CONFIG_AMIGA`
233			`if ((!MACH_IS_AMIGA) \|\|`
234			`(((unsigned long)addr < 0x40000000) \|\|`
235			`((unsigned long)addr > 0x60000000)))`
236			`free_io_area(addr);`
237			`#else`
238			`free_io_area(addr);`
239			`#endif`
240			`}`
241
242			`/*`
243			`* __iounmap unmaps nearly everything, so be careful`
244			`* it doesn't free currently pointer/page tables anymore but it`
245			`* wans't used anyway and might be added later.`
246			`*/`
247			`void __iounmap(void *addr, unsigned long size)`
248			`{`
249			`unsigned long virtaddr = (unsigned long)addr;`
250			`pgd_t *pgd_dir;`
251			`pmd_t *pmd_dir;`
252			`pte_t *pte_dir;`
253
254			`while ((long)size > 0) {`
255			`pgd_dir = pgd_offset_k(virtaddr);`
256			`if (pgd_bad(*pgd_dir)) {`
257			`printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir));`
258			`pgd_clear(pgd_dir);`
259			`return;`
260			`}`
261			`pmd_dir = pmd_offset(pgd_dir, virtaddr);`
262
263			`if (CPU_IS_020_OR_030) {`
264			`int pmd_off = (virtaddr/PTRTREESIZE) & 15;`
265
266			`if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) {`
267			`pmd_dir->pmd[pmd_off] = 0;`
268			`virtaddr += PTRTREESIZE;`
269			`size -= PTRTREESIZE;`
270			`continue;`
271			`}`
272			`}`
273
274			`if (pmd_bad(*pmd_dir)) {`
275			`printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir));`
276			`pmd_clear(pmd_dir);`
277			`return;`
278			`}`
279			`pte_dir = pte_offset(pmd_dir, virtaddr);`
280
281			`pte_val(*pte_dir) = 0;`
282			`virtaddr += PAGE_SIZE;`
283			`size -= PAGE_SIZE;`
284			`}`
285
286			`flush_tlb_all();`
287			`}`
288
289			`/*`
290			`* Set new cache mode for some kernel address space.`
291			`* The caller must push data for that range itself, if such data may already`
292			`* be in the cache.`
293			`*/`
294			`void kernel_set_cachemode(void *addr, unsigned long size, int cmode)`
295			`{`
296			`unsigned long virtaddr = (unsigned long)addr;`
297			`pgd_t *pgd_dir;`
298			`pmd_t *pmd_dir;`
299			`pte_t *pte_dir;`
300
301			`if (CPU_IS_040_OR_060) {`
302			`switch (cmode) {`
303			`case IOMAP_FULL_CACHING:`
304			`cmode = _PAGE_CACHE040;`
305			`break;`
306			`case IOMAP_NOCACHE_SER:`
307			`default:`
308			`cmode = _PAGE_NOCACHE_S;`
309			`break;`
310			`case IOMAP_NOCACHE_NONSER:`
311			`cmode = _PAGE_NOCACHE;`
312			`break;`
313			`case IOMAP_WRITETHROUGH:`
314			`cmode = _PAGE_CACHE040W;`
315			`break;`
316			`}`
317			`} else {`
318			`switch (cmode) {`
319			`case IOMAP_NOCACHE_SER:`
320			`case IOMAP_NOCACHE_NONSER:`
321			`default:`
322			`cmode = _PAGE_NOCACHE030;`
323			`break;`
324			`case IOMAP_FULL_CACHING:`
325			`case IOMAP_WRITETHROUGH:`
326			`cmode = 0;`
327			`}`
328			`}`
329
330			`while ((long)size > 0) {`
331			`pgd_dir = pgd_offset_k(virtaddr);`
332			`if (pgd_bad(*pgd_dir)) {`
333			`printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir));`
334			`pgd_clear(pgd_dir);`
335			`return;`
336			`}`
337			`pmd_dir = pmd_offset(pgd_dir, virtaddr);`
338
339			`if (CPU_IS_020_OR_030) {`
340			`int pmd_off = (virtaddr/PTRTREESIZE) & 15;`
341
342			`if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) {`
343			`pmd_dir->pmd[pmd_off] = (pmd_dir->pmd[pmd_off] &`
344			`_CACHEMASK040) \| cmode;`
345			`virtaddr += PTRTREESIZE;`
346			`size -= PTRTREESIZE;`
347			`continue;`
348			`}`
349			`}`
350
351			`if (pmd_bad(*pmd_dir)) {`
352			`printk("iocachemode: bad pmd (%08lx)\n", pmd_val(*pmd_dir));`
353			`pmd_clear(pmd_dir);`
354			`return;`
355			`}`
356			`pte_dir = pte_offset(pmd_dir, virtaddr);`
357
358			`pte_val(pte_dir) = (pte_val(pte_dir) & _CACHEMASK040) \| cmode;`
359			`virtaddr += PAGE_SIZE;`
360			`size -= PAGE_SIZE;`
361			`}`
362
363			`flush_tlb_all();`
364			`}`