WebSVN – HelenOS – Diff – /trunk/kernel/arch/ia32/src/mm/page.c



   
        /*
         * PA2KA(identity) mapping for all frames until last_frame.
         */
        for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
            flags = PAGE_CACHEABLE | PAGE_WRITE;
            if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))
                flags |= PAGE_GLOBAL;
            page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
        }
 
        exc_register(14, "page_fault", (iroutine) page_fault);
        write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
 
    } else
        write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
 
 
    paging_on();
}
 
 

        panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
   
    uintptr_t virtaddr = PA2KA(last_frame);
    pfn_t i;
    for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
        page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE | PAGE_WRITE);
   
    last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
   
    return virtaddr;
}

Subversion Repositories HelenOS

(root)/trunk/kernel/arch/ia32/src/mm/page.c – Rev 2106 → 2222

Rev 2106		Rev 2222
Line 59...		Line 59...
59		59
60	/*	60	/*
61	* PA2KA(identity) mapping for all frames until last_frame.	61	* PA2KA(identity) mapping for all frames until last_frame.
62	*/	62	*/
63	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {	63	for (cur = 0; cur < last_frame; cur += FRAME_SIZE) {
64	flags = PAGE_CACHEABLE;	64	flags = PAGE_CACHEABLE \| PAGE_WRITE;
65	if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))	65	if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size))
66	flags \|= PAGE_GLOBAL;	66	flags \|= PAGE_GLOBAL;
67	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);	67	page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags);
68	}	68	}
69		69
70	exc_register(14, "page_fault", (iroutine) page_fault);	70	exc_register(14, "page_fault", (iroutine) page_fault);
71	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);	71	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
72	}	-
73	else {	72	} else
74	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);	73	write_cr3((uintptr_t) AS_KERNEL->genarch.page_table);
75	}	-
76		74
77	paging_on();	75	paging_on();
78	}	76	}
79		77
80		78
Line 84...		Line 82...
84	panic("Unable to map physical memory %p (%d bytes)", physaddr, size)	82	panic("Unable to map physical memory %p (%d bytes)", physaddr, size)
85		83
86	uintptr_t virtaddr = PA2KA(last_frame);	84	uintptr_t virtaddr = PA2KA(last_frame);
87	pfn_t i;	85	pfn_t i;
88	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)	86	for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++)
89	page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE);	87	page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE \| PAGE_WRITE);
90		88
91	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);	89	last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);
92		90
93	return virtaddr;	91	return virtaddr;
94	}	92	}