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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <mm/page.h> |
29 | #include <mm/page.h> |
- | 30 | #include <mm/frame.h> |
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30 | #include <arch/mm/page.h> |
31 | #include <arch/mm/page.h> |
- | 32 | #include <arch/interrupt.h> |
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- | 33 | #include <arch/asm.h> |
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- | 34 | #include <config.h> |
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- | 35 | ||
- | 36 | #include <memstr.h> |
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- | 37 | ||
- | 38 | ||
- | 39 | __address bootstrap_dba; |
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31 | 40 | ||
32 | void page_arch_init(void) |
41 | void page_arch_init(void) |
33 | { |
42 | { |
- | 43 | __address dba; |
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- | 44 | count_t i; |
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- | 45 | ||
- | 46 | if (config.cpu_active == 1) { |
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- | 47 | dba = frame_alloc(FRAME_KA | FRAME_PANIC); |
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- | 48 | memsetb(dba, PAGE_SIZE, 0); |
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- | 49 | ||
- | 50 | bootstrap_dba = dba; |
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- | 51 | ||
- | 52 | /* |
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- | 53 | * Identity mapping for all frames. |
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- | 54 | * PA2KA(identity) mapping for all frames. |
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- | 55 | */ |
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- | 56 | for (i = 0; i < frames; i++) { |
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- | 57 | map_page_to_frame(i * PAGE_SIZE, i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba)); |
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- | 58 | map_page_to_frame(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE | PAGE_EXEC, KA2PA(dba)); |
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- | 59 | } |
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- | 60 | ||
- | 61 | trap_register(14, page_fault); |
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- | 62 | write_cr3(KA2PA(dba)); |
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- | 63 | } |
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- | 64 | else { |
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- | 65 | /* |
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- | 66 | * Application processors need to create their own view of the |
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- | 67 | * virtual address space. Because of that, each AP copies |
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- | 68 | * already-initialized paging information from the bootstrap |
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- | 69 | * processor and adjusts it to fulfill its needs. |
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- | 70 | */ |
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- | 71 | ||
- | 72 | dba = frame_alloc(FRAME_KA | FRAME_PANIC); |
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- | 73 | memcpy((void *)dba, (void *)bootstrap_dba , PAGE_SIZE); |
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- | 74 | write_cr3(KA2PA(dba)); |
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- | 75 | } |
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34 | } |
76 | } |