[haiku-commits] BRANCH mmu_man-github.sam460ex - headers/private/kernel/arch/ppc
- From: mmu_man-github.sam460ex <community@xxxxxxxxxxxx>
- To: haiku-commits@xxxxxxxxxxxxx
- Date: Sat, 9 Mar 2013 03:45:32 +0100 (CET)
added 1 changeset to branch 'refs/remotes/mmu_man-github/sam460ex'
old head: 6e809753b1678305bcdef617e820be6353791e0f
new head: 0acc7a44b63a0a1351ac2ed837bfc14a98705422
overview: https://github.com/mmuman/haiku/compare/6e80975...0acc7a4
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0acc7a4: PPC: Work-in-progress MMU definitions for AMCC440/460.
Unfinished. the TLB entries require setting 3 registers plus another
field for the PID.
Didn't yet decide how to store this in the page tables.
[ François Revol <revol@xxxxxxx> ]
----------------------------------------------------------------------------
Commit: 0acc7a44b63a0a1351ac2ed837bfc14a98705422
Author: François Revol <revol@xxxxxxx>
Date: Sat Mar 9 02:26:53 2013 UTC
----------------------------------------------------------------------------
1 file changed, 134 insertions(+)
.../private/kernel/arch/ppc/arch_mmu_amcc440.h | 134 +++++++++++++++++++
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diff --git a/headers/private/kernel/arch/ppc/arch_mmu_amcc440.h
b/headers/private/kernel/arch/ppc/arch_mmu_amcc440.h
new file mode 100644
index 0000000..5bc6f9d
--- /dev/null
+++ b/headers/private/kernel/arch/ppc/arch_mmu_amcc440.h
@@ -0,0 +1,134 @@
+/*
+** Copyright 2003, Axel Dörfler, axeld@xxxxxxxxxxxxxxxx. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+#ifndef _KERNEL_ARCH_PPC_MMU_AMCC440_H
+#define _KERNEL_ARCH_PPC_MMU_AMCC440_H
+
+
+#include <SupportDefs.h>
+#include <string.h>
+
+#include <arch_cpu.h>
+
+
+/*** TLB - translation lookaside buffer ***/
+
+#define TLB_COUNT 64
+
+/** valid tlb length values */
+enum tlb_length {
+ TLB_LENGTH_1kB = 0x0,
+ TLB_LENGTH_4kB = 0x1,
+ TLB_LENGTH_16kB = 0x2,
+ TLB_LENGTH_64kB = 0x3,
+ TLB_LENGTH_256kB = 0x4,
+ TLB_LENGTH_1MB = 0x5,
+ TLB_LENGTH_16MB = 0x7,
+ TLB_LENGTH_256MB = 0x9,
+};
+
+#define TLB_V 0x200
+
+/** structure of a real TLB entry */
+//FIXME
+struct tlb_entry {
+ // word 0
+ uint32 effective_page_number : 22;
+ uint32 valid : 1;
+ uint32 translation_address_space : 1;
+ uint32 page_size : 4;
+ uint32 parity_1 : 4;
+ //uint32 translation_id : 8;
+//FIXME:rest is Classic stuff
+ // word 0
+ // upper 32 bit
+ uint32 page_index : 15; // BEPI, block
effective page index
+ 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;
+ uint32 guarded : 1;
+ uint32 _reserved1 : 1;
+ uint32 protection : 2;
+
+ tlb_entry()
+ {
+ Clear();
+ }
+
+ void SetVirtualAddress(void *address)
+ {
+ page_index = uint32(address) >> 17;
+ }
+
+ void SetPhysicalAddress(void *address)
+ {
+ physical_block_number = uint32(address) >> 17;
+ }
+
+ void Clear()
+ {
+ memset((void *)this, 0, sizeof(tlb_entry));
+ }
+};
+
+#if 0 // XXX:Classic
+/*** 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 secondary_hash : 1;
+ uint32 abbr_page_index : 6;
+ // lower 32 bit
+ uint32 physical_page_number : 20;
+ uint32 _reserved0 : 3;
+ uint32 referenced : 1;
+ uint32 changed : 1;
+ uint32 write_through : 1; // WIMG
+ uint32 caching_inhibited : 1;
+ uint32 memory_coherent : 1;
+ uint32 guarded : 1;
+ uint32 _reserved1 : 1;
+ uint32 page_protection : 2;
+
+ static uint32 PrimaryHash(uint32 virtualSegmentID, uint32
virtualAddress);
+ static uint32 SecondaryHash(uint32 virtualSegmentID, uint32
virtualAddress);
+ static uint32 SecondaryHash(uint32 primaryHash);
+};
+
+struct page_table_entry_group {
+ struct page_table_entry entry[8];
+};
+
+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);
+
+static inline segment_descriptor
+ppc_get_segment_register(void *virtualAddress)
+{
+ return (segment_descriptor)get_sr(virtualAddress);
+}
+
+
+static inline void
+ppc_set_segment_register(void *virtualAddress, segment_descriptor segment)
+{
+ set_sr(virtualAddress, *(uint32 *)&segment);
+}
+
+#endif
+
+#endif /* _KERNEL_ARCH_PPC_MMU_AMCC440_H */
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- » [haiku-commits] BRANCH mmu_man-github.sam460ex - headers/private/kernel/arch/ppc - mmu_man-github . sam460ex
