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/*
* arch/arm/mm/mm-armv.c
*
* Common routines for ARM v3 and v4 architectures.
*
* Copyright (C) 1998 Russell King
*
* Do not compile this file directly!
*/
#ifndef MAPPING
#error MAPPING not defined - do not compile this file individually
#endif
static const struct mapping {
unsigned long virtual;
unsigned long physical;
unsigned long length;
int domain:4,
prot_read:1,
prot_write:1;
} mapping[] __initdata = {
MAPPING
};
#define SIZEOFMAP (sizeof(mapping) / sizeof(mapping[0]))
__initfunc(unsigned long setup_io_pagetables(unsigned long start_mem))
{
const struct mapping *mp;
int i;
for (i = 0, mp = mapping; i < SIZEOFMAP; i++, mp++) {
unsigned long virtual, physical, length;
int prot;
virtual = mp->virtual;
physical = mp->physical;
length = mp->length;
prot = (mp->prot_read ? PTE_AP_READ : 0) | (mp->prot_write ? PTE_AP_WRITE : 0);
while ((virtual & 1048575 || physical & 1048575) && length >= PAGE_SIZE) {
alloc_init_page(&start_mem, virtual, physical, mp->domain, prot);
length -= PAGE_SIZE;
virtual += PAGE_SIZE;
physical += PAGE_SIZE;
}
prot = (mp->prot_read ? PMD_SECT_AP_READ : 0) |
(mp->prot_write ? PMD_SECT_AP_WRITE : 0);
while (length >= 1048576) {
alloc_init_section(&start_mem, virtual, physical, mp->domain, prot);
length -= 1048576;
virtual += 1048576;
physical += 1048576;
}
prot = (mp->prot_read ? PTE_AP_READ : 0) | (mp->prot_write ? PTE_AP_WRITE : 0);
while (length >= PAGE_SIZE) {
alloc_init_page(&start_mem, virtual, physical, mp->domain, prot);
length -= PAGE_SIZE;
virtual += PAGE_SIZE;
physical += PAGE_SIZE;
}
}
return start_mem;
}
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