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Adoption of Travis' PPC code. Changed where needed.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5071 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2003-10-17 13:58:41 +00:00
parent 8c911f6ce6
commit 8c1ae50791
5 changed files with 113 additions and 12 deletions
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headers/private/kernel/arch/ppc/arch_mmu.h
+31 -9
View File
@@ -7,8 +7,11 @@
#include <SupportDefs.h>
#include <string.h>
/*** BAT - block address translation ***/
enum bat_length {
BAT_LENGTH_128kB = 0x0000,
BAT_LENGTH_256kB = 0x0001,
@@ -32,11 +35,12 @@ enum bat_protection {
struct block_address_translation {
// upper 32 bit
uint32 page_index : 15; // BEPI, block effective page index
uint32 _reserved0 : 3;
uint32 length : 10;
uint32 kernel_valid : 1;
uint32 user_valid : 1;
uint32 _reserved0 : 4;
uint32 length : 11;
uint32 kernel_valid : 1; // Vs, Supervisor-state valid
uint32 user_valid : 1; // Vp, User-state valid
// lower 32 bit
uint32 physical_block_number : 15; // BPRN
uint32 write_through : 1; // WIMG
uint32 caching_inhibited : 1;
uint32 memory_coherent : 1;
@@ -44,9 +48,19 @@ struct block_address_translation {
uint32 _reserved1 : 1;
uint32 protection : 2;
void Reset()
void SetVirtualAddress(void *address)
{
*((uint32 *)this) = 0;
page_index = uint32(address) >> 17;
}
void SetPhysicalAddress(void *address)
{
physical_block_number = uint32(address) >> 17;
}
void Clear()
{
memset((void *)this, 0, sizeof(block_address_translation));
}
};
@@ -59,11 +73,19 @@ struct segment_descriptor {
uint32 virtual_segment_id : 24;
};
/*** PTE - page table entry ***/
enum pte_protection {
PTE_READ_ONLY = 3,
PTE_READ_WRITE = 2,
};
struct page_table_entry {
// upper 32 bit
uint32 valid : 1;
uint32 virtual_segment_id : 24;
uint32 hash : 1;
uint32 secondary_hash : 1;
uint32 abbr_page_index : 6;
// lower 32 bit
uint32 physical_page_number : 20;
@@ -86,7 +108,7 @@ struct page_table_entry_group {
struct page_table_entry entry[8];
};
extern void ppc_get_page_table(void **_pageTable, size_t *_size);
extern void ppc_set_page_table(void *pageTable, size_t size);
extern void ppc_get_page_table(page_table_entry_group **_pageTable, size_t *_size);
extern void ppc_set_page_table(page_table_entry_group *pageTable, size_t size);
#endif /* _KERNEL_ARCH_PPC_MMU_H */